{"Address.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn\u0027t rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length \u003e 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity\u0027s `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn\u0027t, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length \u003e 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n                /// @solidity memory-safe-assembly\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"},"BytesLib.sol":{"content":"// SPDX-License-Identifier: Unlicense\n/*\n * @title Solidity Bytes Arrays Utils\n * @author Gonçalo Sá \[email protected]\u003e\n *\n * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity.\n *      The library lets you concatenate, slice and type cast bytes arrays both in memory and storage.\n */\npragma solidity \u003e=0.8.0 \u003c0.9.0;\n\n\nlibrary BytesLib {\n    function concat(\n        bytes memory _preBytes,\n        bytes memory _postBytes\n    )\n    internal\n    pure\n    returns (bytes memory)\n    {\n        bytes memory tempBytes;\n\n        assembly {\n        // Get a location of some free memory and store it in tempBytes as\n        // Solidity does for memory variables.\n            tempBytes := mload(0x40)\n\n        // Store the length of the first bytes array at the beginning of\n        // the memory for tempBytes.\n            let length := mload(_preBytes)\n            mstore(tempBytes, length)\n\n        // Maintain a memory counter for the current write location in the\n        // temp bytes array by adding the 32 bytes for the array length to\n        // the starting location.\n            let mc := add(tempBytes, 0x20)\n        // Stop copying when the memory counter reaches the length of the\n        // first bytes array.\n            let end := add(mc, length)\n\n            for {\n            // Initialize a copy counter to the start of the _preBytes data,\n            // 32 bytes into its memory.\n                let cc := add(_preBytes, 0x20)\n            } lt(mc, end) {\n            // Increase both counters by 32 bytes each iteration.\n                mc := add(mc, 0x20)\n                cc := add(cc, 0x20)\n            } {\n            // Write the _preBytes data into the tempBytes memory 32 bytes\n            // at a time.\n                mstore(mc, mload(cc))\n            }\n\n        // Add the length of _postBytes to the current length of tempBytes\n        // and store it as the new length in the first 32 bytes of the\n        // tempBytes memory.\n            length := mload(_postBytes)\n            mstore(tempBytes, add(length, mload(tempBytes)))\n\n        // Move the memory counter back from a multiple of 0x20 to the\n        // actual end of the _preBytes data.\n            mc := end\n        // Stop copying when the memory counter reaches the new combined\n        // length of the arrays.\n            end := add(mc, length)\n\n            for {\n                let cc := add(_postBytes, 0x20)\n            } lt(mc, end) {\n                mc := add(mc, 0x20)\n                cc := add(cc, 0x20)\n            } {\n                mstore(mc, mload(cc))\n            }\n\n        // Update the free-memory pointer by padding our last write location\n        // to 32 bytes: add 31 bytes to the end of tempBytes to move to the\n        // next 32 byte block, then round down to the nearest multiple of\n        // 32. If the sum of the length of the two arrays is zero then add\n        // one before rounding down to leave a blank 32 bytes (the length block with 0).\n            mstore(0x40, and(\n            add(add(end, iszero(add(length, mload(_preBytes)))), 31),\n            not(31) // Round down to the nearest 32 bytes.\n            ))\n        }\n\n        return tempBytes;\n    }\n\n    function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal {\n        assembly {\n        // Read the first 32 bytes of _preBytes storage, which is the length\n        // of the array. (We don\u0027t need to use the offset into the slot\n        // because arrays use the entire slot.)\n            let fslot := sload(_preBytes.slot)\n        // Arrays of 31 bytes or less have an even value in their slot,\n        // while longer arrays have an odd value. The actual length is\n        // the slot divided by two for odd values, and the lowest order\n        // byte divided by two for even values.\n        // If the slot is even, bitwise and the slot with 255 and divide by\n        // two to get the length. If the slot is odd, bitwise and the slot\n        // with -1 and divide by two.\n            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)\n            let mlength := mload(_postBytes)\n            let newlength := add(slength, mlength)\n        // slength can contain both the length and contents of the array\n        // if length \u003c 32 bytes so let\u0027s prepare for that\n        // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage\n            switch add(lt(slength, 32), lt(newlength, 32))\n            case 2 {\n            // Since the new array still fits in the slot, we just need to\n            // update the contents of the slot.\n            // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length\n                sstore(\n                _preBytes.slot,\n                // all the modifications to the slot are inside this\n                // next block\n                add(\n                // we can just add to the slot contents because the\n                // bytes we want to change are the LSBs\n                fslot,\n                add(\n                mul(\n                div(\n                // load the bytes from memory\n                mload(add(_postBytes, 0x20)),\n                // zero all bytes to the right\n                exp(0x100, sub(32, mlength))\n                ),\n                // and now shift left the number of bytes to\n                // leave space for the length in the slot\n                exp(0x100, sub(32, newlength))\n                ),\n                // increase length by the double of the memory\n                // bytes length\n                mul(mlength, 2)\n                )\n                )\n                )\n            }\n            case 1 {\n            // The stored value fits in the slot, but the combined value\n            // will exceed it.\n            // get the keccak hash to get the contents of the array\n                mstore(0x0, _preBytes.slot)\n                let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n\n            // save new length\n                sstore(_preBytes.slot, add(mul(newlength, 2), 1))\n\n            // The contents of the _postBytes array start 32 bytes into\n            // the structure. Our first read should obtain the `submod`\n            // bytes that can fit into the unused space in the last word\n            // of the stored array. To get this, we read 32 bytes starting\n            // from `submod`, so the data we read overlaps with the array\n            // contents by `submod` bytes. Masking the lowest-order\n            // `submod` bytes allows us to add that value directly to the\n            // stored value.\n\n                let submod := sub(32, slength)\n                let mc := add(_postBytes, submod)\n                let end := add(_postBytes, mlength)\n                let mask := sub(exp(0x100, submod), 1)\n\n                sstore(\n                sc,\n                add(\n                and(\n                fslot,\n                0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00\n                ),\n                and(mload(mc), mask)\n                )\n                )\n\n                for {\n                    mc := add(mc, 0x20)\n                    sc := add(sc, 1)\n                } lt(mc, end) {\n                    sc := add(sc, 1)\n                    mc := add(mc, 0x20)\n                } {\n                    sstore(sc, mload(mc))\n                }\n\n                mask := exp(0x100, sub(mc, end))\n\n                sstore(sc, mul(div(mload(mc), mask), mask))\n            }\n            default {\n            // get the keccak hash to get the contents of the array\n                mstore(0x0, _preBytes.slot)\n            // Start copying to the last used word of the stored array.\n                let sc := add(keccak256(0x0, 0x20), div(slength, 32))\n\n            // save new length\n                sstore(_preBytes.slot, add(mul(newlength, 2), 1))\n\n            // Copy over the first `submod` bytes of the new data as in\n            // case 1 above.\n                let slengthmod := mod(slength, 32)\n                let mlengthmod := mod(mlength, 32)\n                let submod := sub(32, slengthmod)\n                let mc := add(_postBytes, submod)\n                let end := add(_postBytes, mlength)\n                let mask := sub(exp(0x100, submod), 1)\n\n                sstore(sc, add(sload(sc), and(mload(mc), mask)))\n\n                for {\n                    sc := add(sc, 1)\n                    mc := add(mc, 0x20)\n                } lt(mc, end) {\n                    sc := add(sc, 1)\n                    mc := add(mc, 0x20)\n                } {\n                    sstore(sc, mload(mc))\n                }\n\n                mask := exp(0x100, sub(mc, end))\n\n                sstore(sc, mul(div(mload(mc), mask), mask))\n            }\n        }\n    }\n\n    function slice(\n        bytes memory _bytes,\n        uint256 _start,\n        uint256 _length\n    )\n    internal\n    pure\n    returns (bytes memory)\n    {\n        require(_length + 31 \u003e= _length, \"slice_overflow\");\n        require(_bytes.length \u003e= _start + _length, \"slice_outOfBounds\");\n\n        bytes memory tempBytes;\n\n        assembly {\n            switch iszero(_length)\n            case 0 {\n            // Get a location of some free memory and store it in tempBytes as\n            // Solidity does for memory variables.\n                tempBytes := mload(0x40)\n\n            // The first word of the slice result is potentially a partial\n            // word read from the original array. To read it, we calculate\n            // the length of that partial word and start copying that many\n            // bytes into the array. The first word we copy will start with\n            // data we don\u0027t care about, but the last `lengthmod` bytes will\n            // land at the beginning of the contents of the new array. When\n            // we\u0027re done copying, we overwrite the full first word with\n            // the actual length of the slice.\n                let lengthmod := and(_length, 31)\n\n            // The multiplication in the next line is necessary\n            // because when slicing multiples of 32 bytes (lengthmod == 0)\n            // the following copy loop was copying the origin\u0027s length\n            // and then ending prematurely not copying everything it should.\n                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))\n                let end := add(mc, _length)\n\n                for {\n                // The multiplication in the next line has the same exact purpose\n                // as the one above.\n                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)\n                } lt(mc, end) {\n                    mc := add(mc, 0x20)\n                    cc := add(cc, 0x20)\n                } {\n                    mstore(mc, mload(cc))\n                }\n\n                mstore(tempBytes, _length)\n\n            //update free-memory pointer\n            //allocating the array padded to 32 bytes like the compiler does now\n                mstore(0x40, and(add(mc, 31), not(31)))\n            }\n            //if we want a zero-length slice let\u0027s just return a zero-length array\n            default {\n                tempBytes := mload(0x40)\n            //zero out the 32 bytes slice we are about to return\n            //we need to do it because Solidity does not garbage collect\n                mstore(tempBytes, 0)\n\n                mstore(0x40, add(tempBytes, 0x20))\n            }\n        }\n\n        return tempBytes;\n    }\n\n    function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) {\n        require(_bytes.length \u003e= _start + 20, \"toAddress_outOfBounds\");\n        address tempAddress;\n\n        assembly {\n            tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)\n        }\n\n        return tempAddress;\n    }\n\n    function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) {\n        require(_bytes.length \u003e= _start + 1 , \"toUint8_outOfBounds\");\n        uint8 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x1), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) {\n        require(_bytes.length \u003e= _start + 2, \"toUint16_outOfBounds\");\n        uint16 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x2), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) {\n        require(_bytes.length \u003e= _start + 4, \"toUint32_outOfBounds\");\n        uint32 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x4), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) {\n        require(_bytes.length \u003e= _start + 8, \"toUint64_outOfBounds\");\n        uint64 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x8), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) {\n        require(_bytes.length \u003e= _start + 12, \"toUint96_outOfBounds\");\n        uint96 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0xc), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) {\n        require(_bytes.length \u003e= _start + 16, \"toUint128_outOfBounds\");\n        uint128 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x10), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) {\n        require(_bytes.length \u003e= _start + 32, \"toUint256_outOfBounds\");\n        uint256 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x20), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) {\n        require(_bytes.length \u003e= _start + 32, \"toBytes32_outOfBounds\");\n        bytes32 tempBytes32;\n\n        assembly {\n            tempBytes32 := mload(add(add(_bytes, 0x20), _start))\n        }\n\n        return tempBytes32;\n    }\n\n    function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) {\n        bool success = true;\n\n        assembly {\n            let length := mload(_preBytes)\n\n        // if lengths don\u0027t match the arrays are not equal\n            switch eq(length, mload(_postBytes))\n            case 1 {\n            // cb is a circuit breaker in the for loop since there\u0027s\n            //  no said feature for inline assembly loops\n            // cb = 1 - don\u0027t breaker\n            // cb = 0 - break\n                let cb := 1\n\n                let mc := add(_preBytes, 0x20)\n                let end := add(mc, length)\n\n                for {\n                    let cc := add(_postBytes, 0x20)\n                // the next line is the loop condition:\n                // while(uint256(mc \u003c end) + cb == 2)\n                } eq(add(lt(mc, end), cb), 2) {\n                    mc := add(mc, 0x20)\n                    cc := add(cc, 0x20)\n                } {\n                // if any of these checks fails then arrays are not equal\n                    if iszero(eq(mload(mc), mload(cc))) {\n                    // unsuccess:\n                        success := 0\n                        cb := 0\n                    }\n                }\n            }\n            default {\n            // unsuccess:\n                success := 0\n            }\n        }\n\n        return success;\n    }\n\n    function equalStorage(\n        bytes storage _preBytes,\n        bytes memory _postBytes\n    )\n    internal\n    view\n    returns (bool)\n    {\n        bool success = true;\n\n        assembly {\n        // we know _preBytes_offset is 0\n            let fslot := sload(_preBytes.slot)\n        // Decode the length of the stored array like in concatStorage().\n            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)\n            let mlength := mload(_postBytes)\n\n        // if lengths don\u0027t match the arrays are not equal\n            switch eq(slength, mlength)\n            case 1 {\n            // slength can contain both the length and contents of the array\n            // if length \u003c 32 bytes so let\u0027s prepare for that\n            // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage\n                if iszero(iszero(slength)) {\n                    switch lt(slength, 32)\n                    case 1 {\n                    // blank the last byte which is the length\n                        fslot := mul(div(fslot, 0x100), 0x100)\n\n                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {\n                        // unsuccess:\n                            success := 0\n                        }\n                    }\n                    default {\n                    // cb is a circuit breaker in the for loop since there\u0027s\n                    //  no said feature for inline assembly loops\n                    // cb = 1 - don\u0027t breaker\n                    // cb = 0 - break\n                        let cb := 1\n\n                    // get the keccak hash to get the contents of the array\n                        mstore(0x0, _preBytes.slot)\n                        let sc := keccak256(0x0, 0x20)\n\n                        let mc := add(_postBytes, 0x20)\n                        let end := add(mc, mlength)\n\n                    // the next line is the loop condition:\n                    // while(uint256(mc \u003c end) + cb == 2)\n                        for {} eq(add(lt(mc, end), cb), 2) {\n                            sc := add(sc, 1)\n                            mc := add(mc, 0x20)\n                        } {\n                            if iszero(eq(sload(sc), mload(mc))) {\n                            // unsuccess:\n                                success := 0\n                                cb := 0\n                            }\n                        }\n                    }\n                }\n            }\n            default {\n            // unsuccess:\n                success := 0\n            }\n        }\n\n        return success;\n    }\n}\n"},"Context.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n}\n"},"draft-IERC20Permit.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account\u0027s ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn\u0027t\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\ninterface IERC20Permit {\n    /**\n     * @dev Sets `value` as the allowance of `spender` over ``owner``\u0027s tokens,\n     * given ``owner``\u0027s signed approval.\n     *\n     * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n     * ordering also apply here.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `deadline` must be a timestamp in the future.\n     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n     * over the EIP712-formatted function arguments.\n     * - the signature must use ``owner``\u0027s current nonce (see {nonces}).\n     *\n     * For more information on the signature format, see the\n     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n     * section].\n     */\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external;\n\n    /**\n     * @dev Returns the current nonce for `owner`. This value must be\n     * included whenever a signature is generated for {permit}.\n     *\n     * Every successful call to {permit} increases ``owner``\u0027s nonce by one. This\n     * prevents a signature from being used multiple times.\n     */\n    function nonces(address owner) external view returns (uint256);\n\n    /**\n     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n     */\n    // solhint-disable-next-line func-name-mixedcase\n    function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n"},"ExcessivelySafeCall.sol":{"content":"// SPDX-License-Identifier: MIT OR Apache-2.0\npragma solidity \u003e=0.7.6;\n\nlibrary ExcessivelySafeCall {\n    uint256 constant LOW_28_MASK =\n    0x00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff;\n\n    /// @notice Use when you _really_ really _really_ don\u0027t trust the called\n    /// contract. This prevents the called contract from causing reversion of\n    /// the caller in as many ways as we can.\n    /// @dev The main difference between this and a solidity low-level call is\n    /// that we limit the number of bytes that the callee can cause to be\n    /// copied to caller memory. This prevents stupid things like malicious\n    /// contracts returning 10,000,000 bytes causing a local OOG when copying\n    /// to memory.\n    /// @param _target The address to call\n    /// @param _gas The amount of gas to forward to the remote contract\n    /// @param _maxCopy The maximum number of bytes of returndata to copy\n    /// to memory.\n    /// @param _calldata The data to send to the remote contract\n    /// @return success and returndata, as `.call()`. Returndata is capped to\n    /// `_maxCopy` bytes.\n    function excessivelySafeCall(\n        address _target,\n        uint256 _gas,\n        uint16 _maxCopy,\n        bytes memory _calldata\n    ) internal returns (bool, bytes memory) {\n        // set up for assembly call\n        uint256 _toCopy;\n        bool _success;\n        bytes memory _returnData = new bytes(_maxCopy);\n        // dispatch message to recipient\n        // by assembly calling \"handle\" function\n        // we call via assembly to avoid memcopying a very large returndata\n        // returned by a malicious contract\n        assembly {\n            _success := call(\n            _gas, // gas\n            _target, // recipient\n            0, // ether value\n            add(_calldata, 0x20), // inloc\n            mload(_calldata), // inlen\n            0, // outloc\n            0 // outlen\n            )\n        // limit our copy to 256 bytes\n            _toCopy := returndatasize()\n            if gt(_toCopy, _maxCopy) {\n                _toCopy := _maxCopy\n            }\n        // Store the length of the copied bytes\n            mstore(_returnData, _toCopy)\n        // copy the bytes from returndata[0:_toCopy]\n            returndatacopy(add(_returnData, 0x20), 0, _toCopy)\n        }\n        return (_success, _returnData);\n    }\n\n    /// @notice Use when you _really_ really _really_ don\u0027t trust the called\n    /// contract. This prevents the called contract from causing reversion of\n    /// the caller in as many ways as we can.\n    /// @dev The main difference between this and a solidity low-level call is\n    /// that we limit the number of bytes that the callee can cause to be\n    /// copied to caller memory. This prevents stupid things like malicious\n    /// contracts returning 10,000,000 bytes causing a local OOG when copying\n    /// to memory.\n    /// @param _target The address to call\n    /// @param _gas The amount of gas to forward to the remote contract\n    /// @param _maxCopy The maximum number of bytes of returndata to copy\n    /// to memory.\n    /// @param _calldata The data to send to the remote contract\n    /// @return success and returndata, as `.call()`. Returndata is capped to\n    /// `_maxCopy` bytes.\n    function excessivelySafeStaticCall(\n        address _target,\n        uint256 _gas,\n        uint16 _maxCopy,\n        bytes memory _calldata\n    ) internal view returns (bool, bytes memory) {\n        // set up for assembly call\n        uint256 _toCopy;\n        bool _success;\n        bytes memory _returnData = new bytes(_maxCopy);\n        // dispatch message to recipient\n        // by assembly calling \"handle\" function\n        // we call via assembly to avoid memcopying a very large returndata\n        // returned by a malicious contract\n        assembly {\n            _success := staticcall(\n            _gas, // gas\n            _target, // recipient\n            add(_calldata, 0x20), // inloc\n            mload(_calldata), // inlen\n            0, // outloc\n            0 // outlen\n            )\n        // limit our copy to 256 bytes\n            _toCopy := returndatasize()\n            if gt(_toCopy, _maxCopy) {\n                _toCopy := _maxCopy\n            }\n        // Store the length of the copied bytes\n            mstore(_returnData, _toCopy)\n        // copy the bytes from returndata[0:_toCopy]\n            returndatacopy(add(_returnData, 0x20), 0, _toCopy)\n        }\n        return (_success, _returnData);\n    }\n\n    /**\n     * @notice Swaps function selectors in encoded contract calls\n     * @dev Allows reuse of encoded calldata for functions with identical\n     * argument types but different names. It simply swaps out the first 4 bytes\n     * for the new selector. This function modifies memory in place, and should\n     * only be used with caution.\n     * @param _newSelector The new 4-byte selector\n     * @param _buf The encoded contract args\n     */\n    function swapSelector(bytes4 _newSelector, bytes memory _buf)\n    internal\n    pure\n    {\n        require(_buf.length \u003e= 4);\n        uint256 _mask = LOW_28_MASK;\n        assembly {\n        // load the first word of\n            let _word := mload(add(_buf, 0x20))\n        // mask out the top 4 bytes\n        // /x\n            _word := and(_word, _mask)\n            _word := or(_newSelector, _word)\n            mstore(add(_buf, 0x20), _word)\n        }\n    }\n}\n"},"IERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller\u0027s account to `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller\u0027s tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender\u0027s allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `from` to `to` using the\n     * allowance mechanism. `amount` is then deducted from the caller\u0027s\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 amount\n    ) external returns (bool);\n}\n"},"ILayerZeroEndpoint.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity \u003e=0.5.0;\n\nimport \"./ILayerZeroUserApplicationConfig.sol\";\n\ninterface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {\n    // @notice send a LayerZero message to the specified address at a LayerZero endpoint.\n    // @param _dstChainId - the destination chain identifier\n    // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains\n    // @param _payload - a custom bytes payload to send to the destination contract\n    // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address\n    // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction\n    // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination\n    function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;\n\n    // @notice used by the messaging library to publish verified payload\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source contract (as bytes) at the source chain\n    // @param _dstAddress - the address on destination chain\n    // @param _nonce - the unbound message ordering nonce\n    // @param _gasLimit - the gas limit for external contract execution\n    // @param _payload - verified payload to send to the destination contract\n    function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external;\n\n    // @notice get the inboundNonce of a lzApp from a source chain which could be EVM or non-EVM chain\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source chain contract address\n    function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64);\n\n    // @notice get the outboundNonce from this source chain which, consequently, is always an EVM\n    // @param _srcAddress - the source chain contract address\n    function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64);\n\n    // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery\n    // @param _dstChainId - the destination chain identifier\n    // @param _userApplication - the user app address on this EVM chain\n    // @param _payload - the custom message to send over LayerZero\n    // @param _payInZRO - if false, user app pays the protocol fee in native token\n    // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain\n    function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);\n\n    // @notice get this Endpoint\u0027s immutable source identifier\n    function getChainId() external view returns (uint16);\n\n    // @notice the interface to retry failed message on this Endpoint destination\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source chain contract address\n    // @param _payload - the payload to be retried\n    function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external;\n\n    // @notice query if any STORED payload (message blocking) at the endpoint.\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source chain contract address\n    function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool);\n\n    // @notice query if the _libraryAddress is valid for sending msgs.\n    // @param _userApplication - the user app address on this EVM chain\n    function getSendLibraryAddress(address _userApplication) external view returns (address);\n\n    // @notice query if the _libraryAddress is valid for receiving msgs.\n    // @param _userApplication - the user app address on this EVM chain\n    function getReceiveLibraryAddress(address _userApplication) external view returns (address);\n\n    // @notice query if the non-reentrancy guard for send() is on\n    // @return true if the guard is on. false otherwise\n    function isSendingPayload() external view returns (bool);\n\n    // @notice query if the non-reentrancy guard for receive() is on\n    // @return true if the guard is on. false otherwise\n    function isReceivingPayload() external view returns (bool);\n\n    // @notice get the configuration of the LayerZero messaging library of the specified version\n    // @param _version - messaging library version\n    // @param _chainId - the chainId for the pending config change\n    // @param _userApplication - the contract address of the user application\n    // @param _configType - type of configuration. every messaging library has its own convention.\n    function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);\n\n    // @notice get the send() LayerZero messaging library version\n    // @param _userApplication - the contract address of the user application\n    function getSendVersion(address _userApplication) external view returns (uint16);\n\n    // @notice get the lzReceive() LayerZero messaging library version\n    // @param _userApplication - the contract address of the user application\n    function getReceiveVersion(address _userApplication) external view returns (uint16);\n}\n"},"ILayerZeroReceiver.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity \u003e=0.5.0;\n\ninterface ILayerZeroReceiver {\n    // @notice LayerZero endpoint will invoke this function to deliver the message on the destination\n    // @param _srcChainId - the source endpoint identifier\n    // @param _srcAddress - the source sending contract address from the source chain\n    // @param _nonce - the ordered message nonce\n    // @param _payload - the signed payload is the UA bytes has encoded to be sent\n    function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) external;\n}\n"},"ILayerZeroUserApplicationConfig.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity \u003e=0.5.0;\n\ninterface ILayerZeroUserApplicationConfig {\n    // @notice set the configuration of the LayerZero messaging library of the specified version\n    // @param _version - messaging library version\n    // @param _chainId - the chainId for the pending config change\n    // @param _configType - type of configuration. every messaging library has its own convention.\n    // @param _config - configuration in the bytes. can encode arbitrary content.\n    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external;\n\n    // @notice set the send() LayerZero messaging library version to _version\n    // @param _version - new messaging library version\n    function setSendVersion(uint16 _version) external;\n\n    // @notice set the lzReceive() LayerZero messaging library version to _version\n    // @param _version - new messaging library version\n    function setReceiveVersion(uint16 _version) external;\n\n    // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload\n    // @param _srcChainId - the chainId of the source chain\n    // @param _srcAddress - the contract address of the source contract at the source chain\n    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external;\n}\n"},"ITokenBridge.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.6.0;\npragma experimental ABIEncoderV2;\n\nimport \"./LzLib.sol\";\n\ninterface ITokenBridge {\n    enum PacketType {\n        SEND_TO_APTOS,\n        RECEIVE_FROM_APTOS\n    }\n\n    function sendToAptos(\n        address _token,\n        bytes32 _toAddress,\n        uint _amountLD,\n        LzLib.CallParams calldata _callParams,\n        bytes calldata _adapterParams\n    ) external payable;\n\n    function sendETHToAptos(\n        bytes32 _toAddress,\n        uint _amountLD,\n        LzLib.CallParams calldata _callParams,\n        bytes calldata _adapterParams\n    ) external payable;\n\n    function quoteForSend(LzLib.CallParams calldata _callParams, bytes calldata _adapterParams)\n        external\n        view\n        returns (uint nativeFee, uint zroFee);\n\n    event Send(address indexed token, address indexed from, bytes32 indexed to, uint amountLD);\n    event Receive(address indexed token, address indexed to, uint amountLD);\n    event RegisterToken(address token);\n    event SetBridgeBP(uint bridgeFeeBP);\n    event SetWETH(address weth);\n    event SetGlobalPause(bool paused);\n    event SetTokenPause(address token, bool paused);\n    event SetLocalChainId(uint16 localChainId);\n    event SetAptosChainId(uint16 aptosChainId);\n    event SetUseCustomAdapterParams(bool useCustomAdapterParams);\n    event WithdrawFee(address indexed token, address to, uint amountLD);\n    event WithdrawTVL(address indexed token, address to, uint amountLD);\n    event EnableEmergencyWithdraw(bool enabled, uint unlockTime);\n}\n"},"IWETH.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.5.0;\n\ninterface IWETH {\n    function deposit() external payable;\n\n    function transfer(address to, uint value) external returns (bool);\n\n    function withdraw(uint) external;\n\n    function approve(address to, uint value) external returns (bool);\n}\n"},"LzApp.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"./Ownable.sol\";\nimport \"./ILayerZeroReceiver.sol\";\nimport \"./ILayerZeroUserApplicationConfig.sol\";\nimport \"./ILayerZeroEndpoint.sol\";\nimport \"./BytesLib.sol\";\n\n/*\n * a generic LzReceiver implementation\n */\nabstract contract LzApp is Ownable, ILayerZeroReceiver, ILayerZeroUserApplicationConfig {\n    using BytesLib for bytes;\n\n    ILayerZeroEndpoint public immutable lzEndpoint;\n    mapping(uint16 =\u003e bytes) public trustedRemoteLookup;\n    mapping(uint16 =\u003e mapping(uint16 =\u003e uint)) public minDstGasLookup;\n    address public precrime;\n\n    event SetPrecrime(address precrime);\n    event SetTrustedRemote(uint16 _remoteChainId, bytes _path);\n    event SetTrustedRemoteAddress(uint16 _remoteChainId, bytes _remoteAddress);\n    event SetMinDstGas(uint16 _dstChainId, uint16 _type, uint _minDstGas);\n\n    constructor(address _endpoint) {\n        lzEndpoint = ILayerZeroEndpoint(_endpoint);\n    }\n\n    function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) public virtual override {\n        // lzReceive must be called by the endpoint for security\n        require(_msgSender() == address(lzEndpoint), \"LzApp: invalid endpoint caller\");\n\n        bytes memory trustedRemote = trustedRemoteLookup[_srcChainId];\n        // if will still block the message pathway from (srcChainId, srcAddress). should not receive message from untrusted remote.\n        require(_srcAddress.length == trustedRemote.length \u0026\u0026 trustedRemote.length \u003e 0 \u0026\u0026 keccak256(_srcAddress) == keccak256(trustedRemote), \"LzApp: invalid source sending contract\");\n\n        _blockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);\n    }\n\n    // abstract function - the default behaviour of LayerZero is blocking. See: NonblockingLzApp if you dont need to enforce ordered messaging\n    function _blockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual;\n\n    function _lzSend(uint16 _dstChainId, bytes memory _payload, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParams, uint _nativeFee) internal virtual {\n        bytes memory trustedRemote = trustedRemoteLookup[_dstChainId];\n        require(trustedRemote.length != 0, \"LzApp: destination chain is not a trusted source\");\n        lzEndpoint.send{value: _nativeFee}(_dstChainId, trustedRemote, _payload, _refundAddress, _zroPaymentAddress, _adapterParams);\n    }\n\n    function _checkGasLimit(uint16 _dstChainId, uint16 _type, bytes memory _adapterParams, uint _extraGas) internal view virtual {\n        uint providedGasLimit = _getGasLimit(_adapterParams);\n        uint minGasLimit = minDstGasLookup[_dstChainId][_type] + _extraGas;\n        require(minGasLimit \u003e 0, \"LzApp: minGasLimit not set\");\n        require(providedGasLimit \u003e= minGasLimit, \"LzApp: gas limit is too low\");\n    }\n\n    function _getGasLimit(bytes memory _adapterParams) internal pure virtual returns (uint gasLimit) {\n        require(_adapterParams.length \u003e= 34, \"LzApp: invalid adapterParams\");\n        assembly {\n            gasLimit := mload(add(_adapterParams, 34))\n        }\n    }\n\n    //---------------------------UserApplication config----------------------------------------\n    function getConfig(uint16 _version, uint16 _chainId, address, uint _configType) external view returns (bytes memory) {\n        return lzEndpoint.getConfig(_version, _chainId, address(this), _configType);\n    }\n\n    // generic config for LayerZero user Application\n    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external override onlyOwner {\n        lzEndpoint.setConfig(_version, _chainId, _configType, _config);\n    }\n\n    function setSendVersion(uint16 _version) external override onlyOwner {\n        lzEndpoint.setSendVersion(_version);\n    }\n\n    function setReceiveVersion(uint16 _version) external override onlyOwner {\n        lzEndpoint.setReceiveVersion(_version);\n    }\n\n    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external override onlyOwner {\n        lzEndpoint.forceResumeReceive(_srcChainId, _srcAddress);\n    }\n\n    // _path = abi.encodePacked(remoteAddress, localAddress)\n    // this function set the trusted path for the cross-chain communication\n    function setTrustedRemote(uint16 _srcChainId, bytes calldata _path) external onlyOwner {\n        trustedRemoteLookup[_srcChainId] = _path;\n        emit SetTrustedRemote(_srcChainId, _path);\n    }\n\n    function setTrustedRemoteAddress(uint16 _remoteChainId, bytes calldata _remoteAddress) external onlyOwner {\n        trustedRemoteLookup[_remoteChainId] = abi.encodePacked(_remoteAddress, address(this));\n        emit SetTrustedRemoteAddress(_remoteChainId, _remoteAddress);\n    }\n\n    function getTrustedRemoteAddress(uint16 _remoteChainId) external view returns (bytes memory) {\n        bytes memory path = trustedRemoteLookup[_remoteChainId];\n        require(path.length != 0, \"LzApp: no trusted path record\");\n        return path.slice(0, path.length - 20); // the last 20 bytes should be address(this)\n    }\n\n    function setPrecrime(address _precrime) external onlyOwner {\n        precrime = _precrime;\n        emit SetPrecrime(_precrime);\n    }\n\n    function setMinDstGas(uint16 _dstChainId, uint16 _packetType, uint _minGas) external onlyOwner {\n        require(_minGas \u003e 0, \"LzApp: invalid minGas\");\n        minDstGasLookup[_dstChainId][_packetType] = _minGas;\n        emit SetMinDstGas(_dstChainId, _packetType, _minGas);\n    }\n\n    //--------------------------- VIEW FUNCTION ----------------------------------------\n    function isTrustedRemote(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool) {\n        bytes memory trustedSource = trustedRemoteLookup[_srcChainId];\n        return keccak256(trustedSource) == keccak256(_srcAddress);\n    }\n}\n"},"LzLib.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.6.0;\npragma experimental ABIEncoderV2;\n\nlibrary LzLib {\n    // LayerZero communication\n    struct CallParams {\n        address payable refundAddress;\n        address zroPaymentAddress;\n    }\n\n    //---------------------------------------------------------------------------\n    // Address type handling\n\n    struct AirdropParams {\n        uint airdropAmount;\n        bytes32 airdropAddress;\n    }\n\n    function buildAdapterParams(LzLib.AirdropParams memory _airdropParams, uint _uaGasLimit) internal pure returns (bytes memory adapterParams) {\n        if (_airdropParams.airdropAmount == 0 \u0026\u0026 _airdropParams.airdropAddress == bytes32(0x0)) {\n            adapterParams = buildDefaultAdapterParams(_uaGasLimit);\n        } else {\n            adapterParams = buildAirdropAdapterParams(_uaGasLimit, _airdropParams);\n        }\n    }\n\n    // Build Adapter Params\n    function buildDefaultAdapterParams(uint _uaGas) internal pure returns (bytes memory) {\n        // txType 1\n        // bytes  [2       32      ]\n        // fields [txType  extraGas]\n        return abi.encodePacked(uint16(1), _uaGas);\n    }\n\n    function buildAirdropAdapterParams(uint _uaGas, AirdropParams memory _params) internal pure returns (bytes memory) {\n        require(_params.airdropAmount \u003e 0, \"Airdrop amount must be greater than 0\");\n        require(_params.airdropAddress != bytes32(0x0), \"Airdrop address must be set\");\n\n        // txType 2\n        // bytes  [2       32        32            bytes[]         ]\n        // fields [txType  extraGas  dstNativeAmt  dstNativeAddress]\n        return abi.encodePacked(uint16(2), _uaGas, _params.airdropAmount, _params.airdropAddress);\n    }\n\n    function getGasLimit(bytes memory _adapterParams) internal pure returns (uint gasLimit) {\n        require(_adapterParams.length == 34 || _adapterParams.length \u003e 66, \"Invalid adapterParams\");\n        assembly {\n            gasLimit := mload(add(_adapterParams, 34))\n        }\n    }\n\n    // Decode Adapter Params\n    function decodeAdapterParams(bytes memory _adapterParams) internal pure returns (uint16 txType, uint uaGas, uint airdropAmount, address payable airdropAddress) {\n        require(_adapterParams.length == 34 || _adapterParams.length \u003e 66, \"Invalid adapterParams\");\n        assembly {\n            txType := mload(add(_adapterParams, 2))\n            uaGas := mload(add(_adapterParams, 34))\n        }\n        require(txType == 1 || txType == 2, \"Unsupported txType\");\n        require(uaGas \u003e 0, \"Gas too low\");\n\n        if (txType == 2) {\n            assembly {\n                airdropAmount := mload(add(_adapterParams, 66))\n                airdropAddress := mload(add(_adapterParams, 86))\n            }\n        }\n    }\n\n    //---------------------------------------------------------------------------\n    // Address type handling\n    // TODO: testing\n    function bytes32ToAddress(bytes32 _bytes32Address) internal pure returns (address _address) {\n        require(bytes12(_bytes32Address) == bytes12(0), \"Invalid address\"); // first 12 bytes should be empty\n        return address(uint160(uint(_bytes32Address)));\n    }\n\n    function addressToBytes32(address _address) internal pure returns (bytes32 _bytes32Address) {\n        return bytes32(uint(uint160(_address)));\n    }\n}\n"},"NonblockingLzApp.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"./LzApp.sol\";\nimport \"./ExcessivelySafeCall.sol\";\n\n/*\n * the default LayerZero messaging behaviour is blocking, i.e. any failed message will block the channel\n * this abstract class try-catch all fail messages and store locally for future retry. hence, non-blocking\n * NOTE: if the srcAddress is not configured properly, it will still block the message pathway from (srcChainId, srcAddress)\n */\nabstract contract NonblockingLzApp is LzApp {\n    using ExcessivelySafeCall for address;\n\n    constructor(address _endpoint) LzApp(_endpoint) {}\n\n    mapping(uint16 =\u003e mapping(bytes =\u003e mapping(uint64 =\u003e bytes32))) public failedMessages;\n\n    event MessageFailed(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes _payload, bytes _reason);\n    event RetryMessageSuccess(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes32 _payloadHash);\n\n    // overriding the virtual function in LzReceiver\n    function _blockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual override {\n        (bool success, bytes memory reason) = address(this).excessivelySafeCall(gasleft(), 150, abi.encodeWithSelector(this.nonblockingLzReceive.selector, _srcChainId, _srcAddress, _nonce, _payload));\n        // try-catch all errors/exceptions\n        if (!success) {\n            failedMessages[_srcChainId][_srcAddress][_nonce] = keccak256(_payload);\n            emit MessageFailed(_srcChainId, _srcAddress, _nonce, _payload, reason);\n        }\n    }\n\n    function nonblockingLzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) public virtual {\n        // only internal transaction\n        require(_msgSender() == address(this), \"NonblockingLzApp: caller must be LzApp\");\n        _nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);\n    }\n\n    //@notice override this function\n    function _nonblockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual;\n\n    function retryMessage(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) public payable virtual {\n        // assert there is message to retry\n        bytes32 payloadHash = failedMessages[_srcChainId][_srcAddress][_nonce];\n        require(payloadHash != bytes32(0), \"NonblockingLzApp: no stored message\");\n        require(keccak256(_payload) == payloadHash, \"NonblockingLzApp: invalid payload\");\n        // clear the stored message\n        failedMessages[_srcChainId][_srcAddress][_nonce] = bytes32(0);\n        // execute the message. revert if it fails again\n        _nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);\n        emit RetryMessageSuccess(_srcChainId, _srcAddress, _nonce, payloadHash);\n    }\n}\n"},"Ownable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n    address private _owner;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    constructor() {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        _checkOwner();\n        _;\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if the sender is not the owner.\n     */\n    function _checkOwner() internal view virtual {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        _transferOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n}\n"},"ReentrancyGuard.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n    // Booleans are more expensive than uint256 or any type that takes up a full\n    // word because each write operation emits an extra SLOAD to first read the\n    // slot\u0027s contents, replace the bits taken up by the boolean, and then write\n    // back. This is the compiler\u0027s defense against contract upgrades and\n    // pointer aliasing, and it cannot be disabled.\n\n    // The values being non-zero value makes deployment a bit more expensive,\n    // but in exchange the refund on every call to nonReentrant will be lower in\n    // amount. Since refunds are capped to a percentage of the total\n    // transaction\u0027s gas, it is best to keep them low in cases like this one, to\n    // increase the likelihood of the full refund coming into effect.\n    uint256 private constant _NOT_ENTERED = 1;\n    uint256 private constant _ENTERED = 2;\n\n    uint256 private _status;\n\n    constructor() {\n        _status = _NOT_ENTERED;\n    }\n\n    /**\n     * @dev Prevents a contract from calling itself, directly or indirectly.\n     * Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n     * by making the `nonReentrant` function external, and making it call a\n     * `private` function that does the actual work.\n     */\n    modifier nonReentrant() {\n        // On the first call to nonReentrant, _notEntered will be true\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n\n        _;\n\n        // By storing the original value once again, a refund is triggered (see\n        // https://eips.ethereum.org/EIPS/eip-2200)\n        _status = _NOT_ENTERED;\n    }\n}\n"},"SafeERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20.sol\";\nimport \"./draft-IERC20Permit.sol\";\nimport \"./Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n    using Address for address;\n\n    function safeTransfer(\n        IERC20 token,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    function safeTransferFrom(\n        IERC20 token,\n        address from,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    /**\n     * @dev Deprecated. This function has issues similar to the ones found in\n     * {IERC20-approve}, and its usage is discouraged.\n     *\n     * Whenever possible, use {safeIncreaseAllowance} and\n     * {safeDecreaseAllowance} instead.\n     */\n    function safeApprove(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        // safeApprove should only be called when setting an initial allowance,\n        // or when resetting it to zero. To increase and decrease it, use\n        // \u0027safeIncreaseAllowance\u0027 and \u0027safeDecreaseAllowance\u0027\n        require(\n            (value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    function safeIncreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        uint256 newAllowance = token.allowance(address(this), spender) + value;\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n    }\n\n    function safeDecreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(oldAllowance \u003e= value, \"SafeERC20: decreased allowance below zero\");\n            uint256 newAllowance = oldAllowance - value;\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n        }\n    }\n\n    function safePermit(\n        IERC20Permit token,\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal {\n        uint256 nonceBefore = token.nonces(owner);\n        token.permit(owner, spender, value, deadline, v, r, s);\n        uint256 nonceAfter = token.nonces(owner);\n        require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     */\n    function _callOptionalReturn(IERC20 token, bytes memory data) private {\n        // We need to perform a low level call here, to bypass Solidity\u0027s return data size checking mechanism, since\n        // we\u0027re implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n        // the target address contains contract code and also asserts for success in the low-level call.\n\n        bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n        if (returndata.length \u003e 0) {\n            // Return data is optional\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n        }\n    }\n}\n"},"TokenBridge.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity 0.8.15;\n\nimport \"./ReentrancyGuard.sol\";\nimport \"./SafeERC20.sol\";\nimport \"./NonblockingLzApp.sol\";\nimport \"./LzLib.sol\";\n\nimport \"./IWETH.sol\";\nimport \"./ITokenBridge.sol\";\n\ncontract TokenBridge is ITokenBridge, NonblockingLzApp, ReentrancyGuard {\n    using SafeERC20 for IERC20;\n\n    uint public constant BP_DENOMINATOR = 10000;\n    uint8 public constant SHARED_DECIMALS = 6;\n\n    uint16 public aptosChainId;\n\n    uint public bridgeFeeBP;\n\n    mapping(address =\u003e uint64) public tvlSDs; // token address =\u003e tvl\n    mapping(address =\u003e bool) public supportedTokens;\n    mapping(address =\u003e bool) public pausedTokens; // token address =\u003e paused\n    mapping(address =\u003e uint) public ld2sdRates; // token address =\u003e rate\n    address public weth;\n\n    bool public useCustomAdapterParams;\n    bool public globalPaused;\n    bool public emergencyWithdrawEnabled;\n    uint public emergencyWithdrawTime;\n\n    modifier whenNotPaused(address _token) {\n        require(!globalPaused \u0026\u0026 !pausedTokens[_token], \"TokenBridge: paused\");\n        _;\n    }\n\n    modifier emergencyWithdrawUnlocked() {\n        require(emergencyWithdrawEnabled \u0026\u0026 block.timestamp \u003e= emergencyWithdrawTime, \"TokenBridge: emergency withdraw locked\");\n        _;\n    }\n\n    constructor(\n        address _layerZeroEndpoint,\n        uint16 _aptosChainId\n    ) NonblockingLzApp(_layerZeroEndpoint) {\n        aptosChainId = _aptosChainId;\n    }\n\n    function sendToAptos(\n        address _token,\n        bytes32 _toAddress,\n        uint _amountLD,\n        LzLib.CallParams calldata _callParams,\n        bytes calldata _adapterParams\n    ) external payable override whenNotPaused(_token) nonReentrant {\n        require(supportedTokens[_token], \"TokenBridge: token is not supported\");\n\n        // lock token\n        _amountLD = _removeDust(_token, _amountLD);\n        _amountLD = _lockTokenFrom(_token, msg.sender, _amountLD);\n\n        // add tvl\n        uint64 amountSD = _LDtoSD(_token, _amountLD);\n        require(amountSD \u003e 0, \"TokenBridge: amountSD must be greater than 0\");\n        tvlSDs[_token] += amountSD;\n\n        // send to aptos\n        _sendToken(_token, _toAddress, amountSD, _callParams, _adapterParams, msg.value);\n        emit Send(_token, msg.sender, _toAddress, _amountLD);\n    }\n\n    function sendETHToAptos(\n        bytes32 _toAddress,\n        uint _amountLD,\n        LzLib.CallParams calldata _callParams,\n        bytes calldata _adapterParams\n    ) external payable override whenNotPaused(weth) nonReentrant {\n        address _weth = weth; // save gas\n        require(_weth != address(0) \u0026\u0026 supportedTokens[_weth], \"TokenBridge: ETH is not supported\");\n        _amountLD = _removeDust(_weth, _amountLD);\n        require(_amountLD \u003e 0, \"TokenBridge: amount must be greater than 0\");\n        require(msg.value \u003e= _amountLD, \"TokenBridge: fee not enough\");\n\n        // wrap eth and add tvl\n        IWETH(_weth).deposit{value: _amountLD}();\n        uint64 amountSD = _LDtoSD(_weth, _amountLD);\n        tvlSDs[_weth] += amountSD;\n\n        // send to aptos\n        _sendToken(_weth, _toAddress, amountSD, _callParams, _adapterParams, msg.value - _amountLD);\n        emit Send(address(0), msg.sender, _toAddress, _amountLD);\n    }\n\n    function quoteForSend(LzLib.CallParams calldata _callParams, bytes calldata _adapterParams)\n        external\n        view\n        returns (uint nativeFee, uint zroFee)\n    {\n        _checkAdapterParams(_adapterParams);\n        bytes memory payload = _encodeSendPayload(address(0), bytes32(0), 0);\n        bool payInZRO = _callParams.zroPaymentAddress != address(0);\n        return\n            lzEndpoint.estimateFees(aptosChainId, address(this), payload, payInZRO, _adapterParams);\n    }\n\n    // ---------------------- owner functions ----------------------\n    function registerToken(address _token) external onlyOwner {\n        require(_token != address(0), \"TokenBridge: invalid token address\");\n        require(!supportedTokens[_token], \"TokenBridge: token already registered\");\n\n        uint8 localDecimals = _tokenDecimals(_token);\n        require(\n            localDecimals \u003e= SHARED_DECIMALS,\n            \"TokenBridge: decimals must be \u003e= SHARED_DECIMALS\"\n        );\n\n        supportedTokens[_token] = true;\n        ld2sdRates[_token] = 10**(localDecimals - SHARED_DECIMALS);\n        emit RegisterToken(_token);\n    }\n\n    function setBridgeFeeBP(uint _bridgeFeeBP) external onlyOwner {\n        require(_bridgeFeeBP \u003c= BP_DENOMINATOR, \"TokenBridge: bridge fee \u003e 100%\");\n        bridgeFeeBP = _bridgeFeeBP;\n        emit SetBridgeBP(_bridgeFeeBP);\n    }\n\n    function setWETH(address _weth) external onlyOwner {\n        require(_weth != address(0), \"TokenBridge: invalid token address\");\n        weth = _weth;\n        emit SetWETH(_weth);\n    }\n\n    function setGlobalPause(bool _paused) external onlyOwner {\n        globalPaused = _paused;\n        emit SetGlobalPause(_paused);\n    }\n\n    function setTokenPause(address _token, bool _paused) external onlyOwner {\n        pausedTokens[_token] = _paused;\n        emit SetTokenPause(_token, _paused);\n    }\n\n    function setAptosChainId(uint16 _aptosChainId) external onlyOwner {\n        aptosChainId = _aptosChainId;\n        emit SetAptosChainId(_aptosChainId);\n    }\n\n    function setUseCustomAdapterParams(bool _useCustomAdapterParams) external onlyOwner {\n        useCustomAdapterParams = _useCustomAdapterParams;\n        emit SetUseCustomAdapterParams(_useCustomAdapterParams);\n    }\n\n    function withdrawFee(\n        address _token,\n        address _to,\n        uint _amountLD\n    ) public onlyOwner {\n        uint feeLD = accruedFeeLD(_token);\n        require(_amountLD \u003c= feeLD, \"TokenBridge: fee not enough\");\n\n        IERC20(_token).safeTransfer(_to, _amountLD);\n        emit WithdrawFee(_token, _to, _amountLD);\n    }\n\n    function withdrawTVL(\n        address _token,\n        address _to,\n        uint64 _amountSD\n    ) public onlyOwner emergencyWithdrawUnlocked {\n        tvlSDs[_token] -= _amountSD;\n\n        uint amountLD = _SDtoLD(_token, _amountSD);\n        IERC20(_token).safeTransfer(_to, amountLD);\n        emit WithdrawTVL(_token, _to, amountLD);\n    }\n\n    function withdrawEmergency(address _token, address _to) external onlyOwner {\n        // modifier redundant for extra safety\n        withdrawFee(_token, _to, accruedFeeLD(_token));\n        withdrawTVL(_token, _to, tvlSDs[_token]);\n    }\n\n    function enableEmergencyWithdraw(bool enabled) external onlyOwner {\n        emergencyWithdrawEnabled = enabled;\n        emergencyWithdrawTime = enabled ? block.timestamp + 1 weeks : 0; // overrides existing lock time\n        emit EnableEmergencyWithdraw(enabled, emergencyWithdrawTime);\n    }\n\n    // override the renounce ownership inherited by zeppelin ownable\n    function renounceOwnership() public override onlyOwner {}\n\n    // receive ETH from WETH\n    receive() external payable {}\n\n    function accruedFeeLD(address _token) public view returns (uint) {\n        uint tvlLD = _SDtoLD(_token, tvlSDs[_token]);\n        return IERC20(_token).balanceOf(address(this)) - tvlLD;\n    }\n\n    // ---------------------- internal functions ----------------------\n    function _nonblockingLzReceive(\n        uint16 _srcChainId,\n        bytes memory,\n        uint64,\n        bytes memory _payload\n    ) internal override {\n        require(_srcChainId == aptosChainId, \"TokenBridge: invalid source chain id\");\n\n        (address token, address to, uint64 amountSD, bool unwrap) = _decodeReceivePayload(_payload);\n        require(!globalPaused \u0026\u0026 !pausedTokens[token], \"TokenBridge: paused\");\n        require(supportedTokens[token], \"TokenBridge: token is not supported\");\n\n        // sub tvl\n        uint64 tvlSD = tvlSDs[token];\n        require(tvlSD \u003e= amountSD, \"TokenBridge: insufficient liquidity\");\n        tvlSDs[token] = tvlSD - amountSD;\n\n        // pay fee\n        uint amountLD = _SDtoLD(token, amountSD);\n        (amountLD, ) = bridgeFeeBP \u003e 0 ? _payFee(amountLD) : (amountLD, 0);\n\n        // redeem token to receiver\n        if (token == weth \u0026\u0026 unwrap) {\n            _redeemETHTo(weth, payable(to), amountLD);\n            emit Receive(address(0), to, amountLD);\n        } else {\n            to = to == address(0) ? address(0xdEaD) : to; // avoid failure in safeTransfer()\n            IERC20(token).safeTransfer(to, amountLD);\n            emit Receive(token, to, amountLD);\n        }\n    }\n\n    function _redeemETHTo(\n        address _weth,\n        address payable _to,\n        uint _amountLD\n    ) internal {\n        IWETH(_weth).withdraw(_amountLD);\n        _to.transfer(_amountLD);\n    }\n\n    function _lockTokenFrom(\n        address _token,\n        address _from,\n        uint _amountLD\n    ) internal returns (uint) {\n        // support token with transfer fee\n        uint balanceBefore = IERC20(_token).balanceOf(address(this));\n        IERC20(_token).safeTransferFrom(_from, address(this), _amountLD);\n        uint balanceAfter = IERC20(_token).balanceOf(address(this));\n        return balanceAfter - balanceBefore;\n    }\n\n    function _tokenDecimals(address _token) internal view returns (uint8) {\n        (bool success, bytes memory data) = _token.staticcall(\n            abi.encodeWithSignature(\"decimals()\")\n        );\n        require(success, \"TokenBridge: failed to get token decimals\");\n        return abi.decode(data, (uint8));\n    }\n\n    function _payFee(uint _amountLD) internal view returns (uint amountAfterFee, uint fee) {\n        fee = (_amountLD * bridgeFeeBP) / BP_DENOMINATOR;\n        amountAfterFee = _amountLD - fee;\n    }\n\n    function _sendToken(\n        address _token,\n        bytes32 _toAddress,\n        uint64 _amountSD,\n        LzLib.CallParams calldata _callParams,\n        bytes calldata _adapterParams,\n        uint _fee\n    ) internal {\n        _checkAdapterParams(_adapterParams);\n        bytes memory payload = _encodeSendPayload(_token, _toAddress, _amountSD);\n        _lzSend(\n            aptosChainId,\n            payload,\n            _callParams.refundAddress,\n            _callParams.zroPaymentAddress,\n            _adapterParams,\n            _fee\n        );\n    }\n\n    // send payload: packet type(1) + remote token(32) + receiver(32) + amount(8)\n    function _encodeSendPayload(\n        address _token,\n        bytes32 _toAddress,\n        uint64 _amountSD\n    ) internal pure returns (bytes memory) {\n        bytes32 tokenBytes32 = LzLib.addressToBytes32(_token);\n        return\n            abi.encodePacked(uint8(PacketType.SEND_TO_APTOS), tokenBytes32, _toAddress, _amountSD);\n    }\n\n    // receive payload: packet type(1) + remote token(32) + receiver(32) + amount(8) + unwrap flag(1)\n    function _decodeReceivePayload(bytes memory _payload)\n        internal\n        pure\n        returns (\n            address token,\n            address to,\n            uint64 amountSD,\n            bool unwrap\n        )\n    {\n        require(_payload.length == 74, \"TokenBridge: invalid payload length\");\n        PacketType packetType = PacketType(uint8(_payload[0]));\n        require(packetType == PacketType.RECEIVE_FROM_APTOS, \"TokenBridge: unknown packet type\");\n        assembly {\n            token := mload(add(_payload, 33))\n            to := mload(add(_payload, 65))\n            amountSD := mload(add(_payload, 73))\n        }\n        unwrap = uint8(_payload[73]) == 1;\n    }\n\n    function _checkAdapterParams(bytes calldata _adapterParams) internal view {\n        if (useCustomAdapterParams) {\n            _checkGasLimit(aptosChainId, uint16(PacketType.SEND_TO_APTOS), _adapterParams, 0);\n        } else {\n            require(_adapterParams.length == 0, \"TokenBridge: _adapterParams must be empty.\");\n        }\n    }\n\n    function _SDtoLD(address _token, uint64 _amountSD) internal view returns (uint) {\n        return _amountSD * ld2sdRates[_token];\n    }\n\n    function _LDtoSD(address _token, uint _amountLD) internal view returns (uint64) {\n        uint amountSD = _amountLD / ld2sdRates[_token];\n        require(amountSD \u003c= type(uint64).max, \"TokenBridge: amountSD overflow\");\n        return uint64(amountSD);\n    }\n\n    function _removeDust(address _token, uint _amountLD) internal view returns (uint) {\n        return _SDtoLD(_token, _LDtoSD(_token, _amountLD));\n    }\n}\n"}}

// Copyright (C) 2015, 2016, 2017 Dapphub

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.4.18;

contract WETH9 {
    string public name     = "Wrapped Ether";
    string public symbol   = "WETH";
    uint8  public decimals = 18;

    event  Approval(address indexed src, address indexed guy, uint wad);
    event  Transfer(address indexed src, address indexed dst, uint wad);
    event  Deposit(address indexed dst, uint wad);
    event  Withdrawal(address indexed src, uint wad);

    mapping (address => uint)                       public  balanceOf;
    mapping (address => mapping (address => uint))  public  allowance;

    function() public payable {
        deposit();
    }
    function deposit() public payable {
        balanceOf[msg.sender] += msg.value;
        Deposit(msg.sender, msg.value);
    }
    function withdraw(uint wad) public {
        require(balanceOf[msg.sender] >= wad);
        balanceOf[msg.sender] -= wad;
        msg.sender.transfer(wad);
        Withdrawal(msg.sender, wad);
    }

    function totalSupply() public view returns (uint) {
        return this.balance;
    }

    function approve(address guy, uint wad) public returns (bool) {
        allowance[msg.sender][guy] = wad;
        Approval(msg.sender, guy, wad);
        return true;
    }

    function transfer(address dst, uint wad) public returns (bool) {
        return transferFrom(msg.sender, dst, wad);
    }

    function transferFrom(address src, address dst, uint wad)
        public
        returns (bool)
    {
        require(balanceOf[src] >= wad);

        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
            require(allowance[src][msg.sender] >= wad);
            allowance[src][msg.sender] -= wad;
        }

        balanceOf[src] -= wad;
        balanceOf[dst] += wad;

        Transfer(src, dst, wad);

        return true;
    }
}


/*
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  7. Additional Terms.

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  11. Patents.

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  12. No Surrender of Others' Freedom.

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not convey it at all.  For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
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License would be to refrain entirely from conveying the Program.

  13. Use with the GNU Affero General Public License.

  Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work.  The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.

  14. Revised Versions of this License.

  The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time.  Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

  Each version is given a distinguishing version number.  If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation.  If the Program does not specify a version number of the
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  If the Program specifies that a proxy can decide which future
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  17. Interpretation of Sections 15 and 16.

  If the disclaimer of warranty and limitation of liability provided
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Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".

  You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.

  The GNU General Public License does not permit incorporating your program
into proprietary programs.  If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.  But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 * 
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 * 
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     * 
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())
            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())
            switch result
            // delegatecall returns 0 on error.
            case 0 { revert(0, returndatasize()) }
            default { return(0, returndatasize()) }
        }
    }
    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal virtual view returns (address);
    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     * 
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal {
        _beforeFallback();
        _delegate(_implementation());
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback () payable external {
        _fallback();
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive () payable external {
        _fallback();
    }
    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     * 
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./Proxy.sol";
import "../utils/Address.sol";
/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 * 
 * Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
 * {TransparentUpgradeableProxy}.
 */
contract UpgradeableProxy is Proxy {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     * 
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _setImplementation(_logic);
        if(_data.length > 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool success,) = _logic.delegatecall(_data);
            require(success);
        }
    }
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal override view returns (address impl) {
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            impl := sload(slot)
        }
    }
    /**
     * @dev Upgrades the proxy to a new implementation.
     * 
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "UpgradeableProxy: new implementation is not a contract");
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newImplementation)
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }
    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../openzeppelin/proxy/UpgradeableProxy.sol";
/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative inerface of your proxy.
 */
contract OptimizedTransparentUpgradeableProxy is UpgradeableProxy {
    address internal immutable _ADMIN;
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {UpgradeableProxy-constructor}.
     */
    constructor(
        address initialLogic,
        address initialAdmin,
        bytes memory _data
    ) payable UpgradeableProxy(initialLogic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        bytes32 slot = _ADMIN_SLOT;
        _ADMIN = initialAdmin;
        // still store it to work with EIP-1967
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, initialAdmin)
        }
    }
    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }
    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address) {
        return _admin();
    }
    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address) {
        return _implementation();
    }
    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeTo(newImplementation);
    }
    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeTo(newImplementation);
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = newImplementation.delegatecall(data);
        require(success);
    }
    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view returns (address adm) {
        return _ADMIN;
    }
    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _admin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}

{"Address.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize, which returns 0 for contracts in\n        // construction, since the code is only stored at the end of the\n        // constructor execution.\n\n        uint256 size;\n        // solhint-disable-next-line no-inline-assembly\n        assembly { size := extcodesize(account) }\n        return size \u003e 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity\u0027s `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance \u003e= amount, \"Address: insufficient balance\");\n\n        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value\n        (bool success, ) = recipient.call{ value: amount }(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain`call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n      return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {\n        require(address(this).balance \u003e= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = target.call{ value: value }(data);\n        return _verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return _verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return _verifyCallResult(success, returndata, errorMessage);\n    }\n\n    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length \u003e 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                // solhint-disable-next-line no-inline-assembly\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"},"Buffer.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\n// https://github.com/ensdomains/buffer\n\npragma solidity ^0.7.0;\n\n/**\n * @dev A library for working with mutable byte buffers in Solidity.\n *\n * Byte buffers are mutable and expandable, and provide a variety of primitives\n * for writing to them. At any time you can fetch a bytes object containing the\n * current contents of the buffer. The bytes object should not be stored between\n * operations, as it may change due to resizing of the buffer.\n */\nlibrary Buffer {\n    /**\n     * @dev Represents a mutable buffer. Buffers have a current value (buf) and\n     *      a capacity. The capacity may be longer than the current value, in\n     *      which case it can be extended without the need to allocate more memory.\n     */\n    struct buffer {\n        bytes buf;\n        uint capacity;\n    }\n\n    /**\n     * @dev Initializes a buffer with an initial capacity.a co\n     * @param buf The buffer to initialize.\n     * @param capacity The number of bytes of space to allocate the buffer.\n     * @return The buffer, for chaining.\n     */\n    function init(buffer memory buf, uint capacity) internal pure returns (buffer memory) {\n        if (capacity % 32 != 0) {\n            capacity += 32 - (capacity % 32);\n        }\n        // Allocate space for the buffer data\n        buf.capacity = capacity;\n        assembly {\n            let ptr := mload(0x40)\n            mstore(buf, ptr)\n            mstore(ptr, 0)\n            mstore(0x40, add(32, add(ptr, capacity)))\n        }\n        return buf;\n    }\n\n\n    /**\n     * @dev Writes a byte string to a buffer. Resizes if doing so would exceed\n     *      the capacity of the buffer.\n     * @param buf The buffer to append to.\n     * @param off The start offset to write to.\n     * @param rawData The data to append.\n     * @param len The number of bytes to copy.\n     * @return The original buffer, for chaining.\n     */\n    function writeRawBytes(\n        buffer memory buf,\n        uint off,\n        bytes memory rawData,\n        uint offData,\n        uint len\n    ) internal pure returns (buffer memory) {\n        if (off + len \u003e buf.capacity) {\n            resize(buf, max(buf.capacity, len + off) * 2);\n        }\n\n        uint dest;\n        uint src;\n        assembly {\n            // Memory address of the buffer data\n            let bufptr := mload(buf)\n            // Length of existing buffer data\n            let buflen := mload(bufptr)\n            // Start address = buffer address + offset + sizeof(buffer length)\n            dest := add(add(bufptr, 32), off)\n            // Update buffer length if we\u0027re extending it\n            if gt(add(len, off), buflen) {\n                mstore(bufptr, add(len, off))\n            }\n            src := add(rawData, offData)\n        }\n\n        // Copy word-length chunks while possible\n        for (; len \u003e= 32; len -= 32) {\n            assembly {\n                mstore(dest, mload(src))\n            }\n            dest += 32;\n            src += 32;\n        }\n\n        // Copy remaining bytes\n        uint mask = 256**(32 - len) - 1;\n        assembly {\n            let srcpart := and(mload(src), not(mask))\n            let destpart := and(mload(dest), mask)\n            mstore(dest, or(destpart, srcpart))\n        }\n\n        return buf;\n    }\n\n    /**\n     * @dev Writes a byte string to a buffer. Resizes if doing so would exceed\n     *      the capacity of the buffer.\n     * @param buf The buffer to append to.\n     * @param off The start offset to write to.\n     * @param data The data to append.\n     * @param len The number of bytes to copy.\n     * @return The original buffer, for chaining.\n     */\n    function write(buffer memory buf, uint off, bytes memory data, uint len) internal pure returns (buffer memory) {\n        require(len \u003c= data.length);\n\n        if (off + len \u003e buf.capacity) {\n            resize(buf, max(buf.capacity, len + off) * 2);\n        }\n\n        uint dest;\n        uint src;\n        assembly {\n        // Memory address of the buffer data\n            let bufptr := mload(buf)\n        // Length of existing buffer data\n            let buflen := mload(bufptr)\n        // Start address = buffer address + offset + sizeof(buffer length)\n            dest := add(add(bufptr, 32), off)\n        // Update buffer length if we\u0027re extending it\n            if gt(add(len, off), buflen) {\n                mstore(bufptr, add(len, off))\n            }\n            src := add(data, 32)\n        }\n\n        // Copy word-length chunks while possible\n        for (; len \u003e= 32; len -= 32) {\n            assembly {\n                mstore(dest, mload(src))\n            }\n            dest += 32;\n            src += 32;\n        }\n\n        // Copy remaining bytes\n        uint mask = 256**(32 - len) - 1;\n        assembly {\n            let srcpart := and(mload(src), not(mask))\n            let destpart := and(mload(dest), mask)\n            mstore(dest, or(destpart, srcpart))\n        }\n\n        return buf;\n    }\n\n    function append(buffer memory buf, bytes memory data) internal pure returns (buffer memory) {\n        return write(buf, buf.buf.length, data, data.length);\n    }\n\n    function resize(buffer memory buf, uint capacity) private pure {\n        bytes memory oldbuf = buf.buf;\n        init(buf, capacity);\n        append(buf, oldbuf);\n    }\n\n    function max(uint a, uint b) private pure returns (uint) {\n        if (a \u003e b) {\n            return a;\n        }\n        return b;\n    }\n}\n"},"Context.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity \u003e=0.6.0 \u003c0.8.0;\n\n/*\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with GSN meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address payable) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes memory) {\n        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\n        return msg.data;\n    }\n}\n"},"IERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller\u0027s account to `recipient`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller\u0027s tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender\u0027s allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\n     * allowance mechanism. `amount` is then deducted from the caller\u0027s\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"},"ILayerZeroEndpoint.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.5.0;\n\nimport \"./ILayerZeroUserApplicationConfig.sol\";\n\ninterface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {\n    // @notice send a LayerZero message to the specified address at a LayerZero endpoint.\n    // @param _dstChainId - the destination chain identifier\n    // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains\n    // @param _payload - a custom bytes payload to send to the destination contract\n    // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address\n    // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction\n    // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination\n    function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;\n\n    // @notice used by the messaging library to publish verified payload\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source contract (as bytes) at the source chain\n    // @param _dstAddress - the address on destination chain\n    // @param _nonce - the unbound message ordering nonce\n    // @param _gasLimit - the gas limit for external contract execution\n    // @param _payload - verified payload to send to the destination contract\n    function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external;\n\n    // @notice get the inboundNonce of a receiver from a source chain which could be EVM or non-EVM chain\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source chain contract address\n    function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64);\n\n    // @notice get the outboundNonce from this source chain which, consequently, is always an EVM\n    // @param _srcAddress - the source chain contract address\n    function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64);\n\n    // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery\n    // @param _dstChainId - the destination chain identifier\n    // @param _userApplication - the user app address on this EVM chain\n    // @param _payload - the custom message to send over LayerZero\n    // @param _payInZRO - if false, user app pays the protocol fee in native token\n    // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain\n    function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);\n\n    // @notice get this Endpoint\u0027s immutable source identifier\n    function getChainId() external view returns (uint16);\n\n    // @notice the interface to retry failed message on this Endpoint destination\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source chain contract address\n    // @param _payload - the payload to be retried\n    function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external;\n\n    // @notice query if any STORED payload (message blocking) at the endpoint.\n    // @param _srcChainId - the source chain identifier\n    // @param _srcAddress - the source chain contract address\n    function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool);\n\n    // @notice query if the _libraryAddress is valid for sending msgs.\n    // @param _userApplication - the user app address on this EVM chain\n    function getSendLibraryAddress(address _userApplication) external view returns (address);\n\n    // @notice query if the _libraryAddress is valid for receiving msgs.\n    // @param _userApplication - the user app address on this EVM chain\n    function getReceiveLibraryAddress(address _userApplication) external view returns (address);\n\n    // @notice query if the non-reentrancy guard for send() is on\n    // @return true if the guard is on. false otherwise\n    function isSendingPayload() external view returns (bool);\n\n    // @notice query if the non-reentrancy guard for receive() is on\n    // @return true if the guard is on. false otherwise\n    function isReceivingPayload() external view returns (bool);\n\n    // @notice get the configuration of the LayerZero messaging library of the specified version\n    // @param _version - messaging library version\n    // @param _chainId - the chainId for the pending config change\n    // @param _userApplication - the contract address of the user application\n    // @param _configType - type of configuration. every messaging library has its own convention.\n    function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);\n\n    // @notice get the send() LayerZero messaging library version\n    // @param _userApplication - the contract address of the user application\n    function getSendVersion(address _userApplication) external view returns (uint16);\n\n    // @notice get the lzReceive() LayerZero messaging library version\n    // @param _userApplication - the contract address of the user application\n    function getReceiveVersion(address _userApplication) external view returns (uint16);\n}\n"},"ILayerZeroMessagingLibrary.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.7.0;\n\nimport \"./ILayerZeroUserApplicationConfig.sol\";\n\ninterface ILayerZeroMessagingLibrary {\n    // send(), messages will be inflight.\n    function send(address _userApplication, uint64 _lastNonce, uint16 _chainId, bytes calldata _destination, bytes calldata _payload, address payable refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;\n\n    // estimate native fee at the send side\n    function estimateFees(uint16 _chainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);\n\n    //---------------------------------------------------------------------------\n    // setConfig / getConfig are User Application (UA) functions to specify Oracle, Relayer, blockConfirmations, libraryVersion\n    function setConfig(uint16 _chainId, address _userApplication, uint _configType, bytes calldata _config) external;\n\n    function getConfig(uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);\n}\n"},"ILayerZeroMessagingLibraryV2.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.7.0;\n\nimport \"./ILayerZeroUserApplicationConfig.sol\";\nimport \"./ILayerZeroMessagingLibrary.sol\";\n\ninterface ILayerZeroMessagingLibraryV2 is ILayerZeroMessagingLibrary {\n    function getOutboundNonce(uint16 _chainId, bytes calldata _path) external view returns (uint64);\n}\n"},"ILayerZeroOracleV2.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.7.0;\n\ninterface ILayerZeroOracleV2 {\n    // @notice query price and assign jobs at the same time\n    // @param _dstChainId - the destination endpoint identifier\n    // @param _outboundProofType - the proof type identifier to specify proof to be relayed\n    // @param _outboundBlockConfirmation - block confirmation delay before relaying blocks\n    // @param _userApplication - the source sending contract address\n    function assignJob(uint16 _dstChainId, uint16 _outboundProofType, uint64 _outboundBlockConfirmation, address _userApplication) external returns (uint price);\n\n    // @notice query the oracle price for relaying block information to the destination chain\n    // @param _dstChainId the destination endpoint identifier\n    // @param _outboundProofType the proof type identifier to specify the data to be relayed\n    // @param _outboundBlockConfirmation - block confirmation delay before relaying blocks\n    // @param _userApplication - the source sending contract address\n    function getFee(uint16 _dstChainId, uint16 _outboundProofType, uint64 _outboundBlockConfirmation, address _userApplication) external view returns (uint price);\n\n    // @notice withdraw the accrued fee in ultra light node\n    // @param _to - the fee receiver\n    // @param _amount - the withdrawal amount\n    function withdrawFee(address payable _to, uint _amount) external;\n}\n"},"ILayerZeroReceiver.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.5.0;\n\ninterface ILayerZeroReceiver {\n    // @notice LayerZero endpoint will invoke this function to deliver the message on the destination\n    // @param _srcChainId - the source endpoint identifier\n    // @param _srcAddress - the source sending contract address from the source chain\n    // @param _nonce - the ordered message nonce\n    // @param _payload - the signed payload is the UA bytes has encoded to be sent\n    function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) external;\n}\n"},"ILayerZeroRelayerV2.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.7.0;\n\ninterface ILayerZeroRelayerV2 {\n    // @notice query price and assign jobs at the same time\n    // @param _dstChainId - the destination endpoint identifier\n    // @param _outboundProofType - the proof type identifier to specify proof to be relayed\n    // @param _userApplication - the source sending contract address. relayers may apply price discrimination to user apps\n    // @param _payloadSize - the length of the payload. it is an indicator of gas usage for relaying cross-chain messages\n    // @param _adapterParams - optional parameters for extra service plugins, e.g. sending dust tokens at the destination chain\n    function assignJob(uint16 _dstChainId, uint16 _outboundProofType, address _userApplication, uint _payloadSize, bytes calldata _adapterParams) external returns (uint price);\n\n    // @notice query the relayer price for relaying the payload and its proof to the destination chain\n    // @param _dstChainId - the destination endpoint identifier\n    // @param _outboundProofType - the proof type identifier to specify proof to be relayed\n    // @param _userApplication - the source sending contract address. relayers may apply price discrimination to user apps\n    // @param _payloadSize - the length of the payload. it is an indicator of gas usage for relaying cross-chain messages\n    // @param _adapterParams - optional parameters for extra service plugins, e.g. sending dust tokens at the destination chain\n    function getFee(uint16 _dstChainId, uint16 _outboundProofType, address _userApplication, uint _payloadSize, bytes calldata _adapterParams) external view returns (uint price);\n\n    // @notice withdraw the accrued fee in ultra light node\n    // @param _to - the fee receiver\n    // @param _amount - the withdrawal amount\n    function withdrawFee(address payable _to, uint _amount) external;\n}\n"},"ILayerZeroTreasury.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.5.0;\n\ninterface ILayerZeroTreasury {\n    function getFees(bool payInZro, uint relayerFee, uint oracleFee) external view returns (uint);\n}\n"},"ILayerZeroUltraLightNodeV2.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.7.0;\npragma abicoder v2;\n\ninterface ILayerZeroUltraLightNodeV2 {\n    // Relayer functions\n    function validateTransactionProof(uint16 _srcChainId, address _dstAddress, uint _gasLimit, bytes32 _lookupHash, bytes32 _blockData, bytes calldata _transactionProof) external;\n\n    // an Oracle delivers the block data using updateHash()\n    function updateHash(uint16 _srcChainId, bytes32 _lookupHash, uint _confirmations, bytes32 _blockData) external;\n\n    // can only withdraw the receivable of the msg.sender\n    function withdrawNative(address payable _to, uint _amount) external;\n\n    function withdrawZRO(address _to, uint _amount) external;\n\n    // view functions\n    function getAppConfig(uint16 _remoteChainId, address _userApplicationAddress) external view returns (ApplicationConfiguration memory);\n\n    function accruedNativeFee(address _address) external view returns (uint);\n\n    struct ApplicationConfiguration {\n        uint16 inboundProofLibraryVersion;\n        uint64 inboundBlockConfirmations;\n        address relayer;\n        uint16 outboundProofType;\n        uint64 outboundBlockConfirmations;\n        address oracle;\n    }\n\n    event HashReceived(uint16 indexed srcChainId, address indexed oracle, bytes32 lookupHash, bytes32 blockData, uint confirmations);\n    event RelayerParams(bytes adapterParams, uint16 outboundProofType);\n    event Packet(bytes payload);\n    event InvalidDst(uint16 indexed srcChainId, bytes srcAddress, address indexed dstAddress, uint64 nonce, bytes32 payloadHash);\n    event PacketReceived(uint16 indexed srcChainId, bytes srcAddress, address indexed dstAddress, uint64 nonce, bytes32 payloadHash);\n    event AppConfigUpdated(address indexed userApplication, uint indexed configType, bytes newConfig);\n    event AddInboundProofLibraryForChain(uint16 indexed chainId, address lib);\n    event EnableSupportedOutboundProof(uint16 indexed chainId, uint16 proofType);\n    event SetChainAddressSize(uint16 indexed chainId, uint size);\n    event SetDefaultConfigForChainId(uint16 indexed chainId, uint16 inboundProofLib, uint64 inboundBlockConfirm, address relayer, uint16 outboundProofType, uint64 outboundBlockConfirm, address oracle);\n    event SetDefaultAdapterParamsForChainId(uint16 indexed chainId, uint16 indexed proofType, bytes adapterParams);\n    event SetLayerZeroToken(address indexed tokenAddress);\n    event SetRemoteUln(uint16 indexed chainId, bytes32 uln);\n    event SetTreasury(address indexed treasuryAddress);\n    event WithdrawZRO(address indexed msgSender, address indexed to, uint amount);\n    event WithdrawNative(address indexed msgSender, address indexed to, uint amount);\n}\n"},"ILayerZeroUserApplicationConfig.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.5.0;\n\ninterface ILayerZeroUserApplicationConfig {\n    // @notice set the configuration of the LayerZero messaging library of the specified version\n    // @param _version - messaging library version\n    // @param _chainId - the chainId for the pending config change\n    // @param _configType - type of configuration. every messaging library has its own convention.\n    // @param _config - configuration in the bytes. can encode arbitrary content.\n    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external;\n\n    // @notice set the send() LayerZero messaging library version to _version\n    // @param _version - new messaging library version\n    function setSendVersion(uint16 _version) external;\n\n    // @notice set the lzReceive() LayerZero messaging library version to _version\n    // @param _version - new messaging library version\n    function setReceiveVersion(uint16 _version) external;\n\n    // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload\n    // @param _srcChainId - the chainId of the source chain\n    // @param _srcAddress - the contract address of the source contract at the source chain\n    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external;\n}\n"},"ILayerZeroValidationLibrary.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity \u003e=0.7.0;\npragma abicoder v2;\n\nimport \"./LayerZeroPacket.sol\";\n\ninterface ILayerZeroValidationLibrary {\n    function validateProof(bytes32 blockData, bytes calldata _data, uint _remoteAddressSize) external returns (LayerZeroPacket.Packet memory packet);\n}\n"},"LayerZeroPacket.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity 0.7.6;\n\nimport \"./Buffer.sol\";\nimport \"./SafeMath.sol\";\n\nlibrary LayerZeroPacket {\n    using Buffer for Buffer.buffer;\n    using SafeMath for uint;\n\n    struct Packet {\n        uint16 srcChainId;\n        uint16 dstChainId;\n        uint64 nonce;\n        address dstAddress;\n        bytes srcAddress;\n        bytes32 ulnAddress;\n        bytes payload;\n    }\n\n    function getPacket(\n        bytes memory data,\n        uint16 srcChain,\n        uint sizeOfSrcAddress,\n        bytes32 ulnAddress\n    ) internal pure returns (LayerZeroPacket.Packet memory) {\n        uint16 dstChainId;\n        address dstAddress;\n        uint size;\n        uint64 nonce;\n\n        // The log consists of the destination chain id and then a bytes payload\n        //      0--------------------------------------------31\n        // 0   |  total bytes size\n        // 32  |  destination chain id\n        // 64  |  bytes offset\n        // 96  |  bytes array size\n        // 128 |  payload\n        assembly {\n            dstChainId := mload(add(data, 32))\n            size := mload(add(data, 96)) /// size of the byte array\n            nonce := mload(add(data, 104)) // offset to convert to uint64  128  is index -24\n            dstAddress := mload(add(data, sub(add(128, sizeOfSrcAddress), 4))) // offset to convert to address 12 -8\n        }\n\n        Buffer.buffer memory srcAddressBuffer;\n        srcAddressBuffer.init(sizeOfSrcAddress);\n        srcAddressBuffer.writeRawBytes(0, data, 136, sizeOfSrcAddress); // 128 + 8\n\n        uint payloadSize = size.sub(28).sub(sizeOfSrcAddress);\n        Buffer.buffer memory payloadBuffer;\n        payloadBuffer.init(payloadSize);\n        payloadBuffer.writeRawBytes(0, data, sizeOfSrcAddress.add(156), payloadSize); // 148 + 8\n        return LayerZeroPacket.Packet(srcChain, dstChainId, nonce, dstAddress, srcAddressBuffer.buf, ulnAddress, payloadBuffer.buf);\n    }\n\n    function getPacketV2(\n        bytes memory data,\n        uint sizeOfSrcAddress,\n        bytes32 ulnAddress\n    ) internal pure returns (LayerZeroPacket.Packet memory) {\n        // packet def: abi.encodePacked(nonce, srcChain, srcAddress, dstChain, dstAddress, payload);\n        // data def: abi.encode(packet) = offset(32) + length(32) + packet\n        //              if from EVM\n        // 0 - 31       0 - 31          |  total bytes size\n        // 32 - 63      32 - 63         |  location\n        // 64 - 95      64 - 95         |  size of the packet\n        // 96 - 103     96 - 103        |  nonce\n        // 104 - 105    104 - 105       |  srcChainId\n        // 106 - P      106 - 125       |  srcAddress, where P = 106 + sizeOfSrcAddress - 1,\n        // P+1 - P+2    126 - 127       |  dstChainId\n        // P+3 - P+22   128 - 147       |  dstAddress\n        // P+23 - END   148 - END       |  payload\n\n        // decode the packet\n        uint256 realSize;\n        uint64 nonce;\n        uint16 srcChain;\n        uint16 dstChain;\n        address dstAddress;\n        assembly {\n            realSize := mload(add(data, 64))\n            nonce := mload(add(data, 72)) // 104 - 32\n            srcChain := mload(add(data, 74)) // 106 - 32\n            dstChain := mload(add(data, add(76, sizeOfSrcAddress))) // P + 3 - 32 = 105 + size + 3 - 32 = 76 + size\n            dstAddress := mload(add(data, add(96, sizeOfSrcAddress))) // P + 23 - 32 = 105 + size + 23 - 32 = 96 + size\n        }\n\n        require(srcChain != 0, \"LayerZeroPacket: invalid packet\");\n\n        Buffer.buffer memory srcAddressBuffer;\n        srcAddressBuffer.init(sizeOfSrcAddress);\n        srcAddressBuffer.writeRawBytes(0, data, 106, sizeOfSrcAddress);\n\n        uint nonPayloadSize = sizeOfSrcAddress.add(32);// 2 + 2 + 8 + 20, 32 + 20 = 52 if sizeOfSrcAddress == 20\n        uint payloadSize = realSize.sub(nonPayloadSize);\n        Buffer.buffer memory payloadBuffer;\n        payloadBuffer.init(payloadSize);\n        payloadBuffer.writeRawBytes(0, data, nonPayloadSize.add(96), payloadSize);\n\n        return LayerZeroPacket.Packet(srcChain, dstChain, nonce, dstAddress, srcAddressBuffer.buf, ulnAddress, payloadBuffer.buf);\n    }\n\n    function getPacketV3(\n        bytes memory data,\n        uint sizeOfSrcAddress,\n        bytes32 ulnAddress\n    ) internal pure returns (LayerZeroPacket.Packet memory) {\n        // data def: abi.encodePacked(nonce, srcChain, srcAddress, dstChain, dstAddress, payload);\n        //              if from EVM\n        // 0 - 31       0 - 31          |  total bytes size\n        // 32 - 39      32 - 39         |  nonce\n        // 40 - 41      40 - 41         |  srcChainId\n        // 42 - P       42 - 61         |  srcAddress, where P = 41 + sizeOfSrcAddress,\n        // P+1 - P+2    62 - 63         |  dstChainId\n        // P+3 - P+22   64 - 83         |  dstAddress\n        // P+23 - END   84 - END        |  payload\n\n        // decode the packet\n        uint256 realSize = data.length;\n        uint nonPayloadSize = sizeOfSrcAddress.add(32);// 2 + 2 + 8 + 20, 32 + 20 = 52 if sizeOfSrcAddress == 20\n        require(realSize \u003e= nonPayloadSize, \"LayerZeroPacket: invalid packet\");\n        uint payloadSize = realSize - nonPayloadSize;\n\n        uint64 nonce;\n        uint16 srcChain;\n        uint16 dstChain;\n        address dstAddress;\n        assembly {\n            nonce := mload(add(data, 8)) // 40 - 32\n            srcChain := mload(add(data, 10)) // 42 - 32\n            dstChain := mload(add(data, add(12, sizeOfSrcAddress))) // P + 3 - 32 = 41 + size + 3 - 32 = 12 + size\n            dstAddress := mload(add(data, add(32, sizeOfSrcAddress))) // P + 23 - 32 = 41 + size + 23 - 32 = 32 + size\n        }\n\n        require(srcChain != 0, \"LayerZeroPacket: invalid packet\");\n\n        Buffer.buffer memory srcAddressBuffer;\n        srcAddressBuffer.init(sizeOfSrcAddress);\n        srcAddressBuffer.writeRawBytes(0, data, 42, sizeOfSrcAddress);\n\n        Buffer.buffer memory payloadBuffer;\n        if (payloadSize \u003e 0) {\n            payloadBuffer.init(payloadSize);\n            payloadBuffer.writeRawBytes(0, data, nonPayloadSize.add(32), payloadSize);\n        }\n\n        return LayerZeroPacket.Packet(srcChain, dstChain, nonce, dstAddress, srcAddressBuffer.buf, ulnAddress, payloadBuffer.buf);\n    }\n}\n"},"NonceContract.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity 0.7.6;\n\nimport \"./ILayerZeroEndpoint.sol\";\n\ncontract NonceContract {\n    ILayerZeroEndpoint public immutable endpoint;\n    // outboundNonce = [dstChainId][remoteAddress + localAddress]\n    mapping(uint16 =\u003e mapping(bytes =\u003e uint64)) public outboundNonce;\n\n    constructor(address _endpoint) {\n        endpoint = ILayerZeroEndpoint(_endpoint);\n    }\n\n    function increment(uint16 _chainId, address _ua, bytes calldata _path) external returns (uint64) {\n        require(endpoint.getSendLibraryAddress(_ua) == msg.sender, \"NonceContract: msg.sender is not valid sendlibrary\");\n        return ++outboundNonce[_chainId][_path];\n    }\n}\n"},"Ownable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\nimport \"./Context.sol\";\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n    address private _owner;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    constructor () {\n        address msgSender = _msgSender();\n        _owner = msgSender;\n        emit OwnershipTransferred(address(0), msgSender);\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n        _;\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        emit OwnershipTransferred(_owner, address(0));\n        _owner = address(0);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        emit OwnershipTransferred(_owner, newOwner);\n        _owner = newOwner;\n    }\n}\n"},"ReentrancyGuard.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n    // Booleans are more expensive than uint256 or any type that takes up a full\n    // word because each write operation emits an extra SLOAD to first read the\n    // slot\u0027s contents, replace the bits taken up by the boolean, and then write\n    // back. This is the compiler\u0027s defense against contract upgrades and\n    // pointer aliasing, and it cannot be disabled.\n\n    // The values being non-zero value makes deployment a bit more expensive,\n    // but in exchange the refund on every call to nonReentrant will be lower in\n    // amount. Since refunds are capped to a percentage of the total\n    // transaction\u0027s gas, it is best to keep them low in cases like this one, to\n    // increase the likelihood of the full refund coming into effect.\n    uint256 private constant _NOT_ENTERED = 1;\n    uint256 private constant _ENTERED = 2;\n\n    uint256 private _status;\n\n    constructor () {\n        _status = _NOT_ENTERED;\n    }\n\n    /**\n     * @dev Prevents a contract from calling itself, directly or indirectly.\n     * Calling a `nonReentrant` function from another `nonReentrant`\n     * function is not supported. It is possible to prevent this from happening\n     * by making the `nonReentrant` function external, and make it call a\n     * `private` function that does the actual work.\n     */\n    modifier nonReentrant() {\n        // On the first call to nonReentrant, _notEntered will be true\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n\n        _;\n\n        // By storing the original value once again, a refund is triggered (see\n        // https://eips.ethereum.org/EIPS/eip-2200)\n        _status = _NOT_ENTERED;\n    }\n}\n"},"SafeERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\nimport \"./IERC20.sol\";\nimport \"./SafeMath.sol\";\nimport \"./Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n    using SafeMath for uint256;\n    using Address for address;\n\n    function safeTransfer(IERC20 token, address to, uint256 value) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    /**\n     * @dev Deprecated. This function has issues similar to the ones found in\n     * {IERC20-approve}, and its usage is discouraged.\n     *\n     * Whenever possible, use {safeIncreaseAllowance} and\n     * {safeDecreaseAllowance} instead.\n     */\n    function safeApprove(IERC20 token, address spender, uint256 value) internal {\n        // safeApprove should only be called when setting an initial allowance,\n        // or when resetting it to zero. To increase and decrease it, use\n        // \u0027safeIncreaseAllowance\u0027 and \u0027safeDecreaseAllowance\u0027\n        // solhint-disable-next-line max-line-length\n        require((value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        uint256 newAllowance = token.allowance(address(this), spender).add(value);\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n    }\n\n    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        uint256 newAllowance = token.allowance(address(this), spender).sub(value, \"SafeERC20: decreased allowance below zero\");\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     */\n    function _callOptionalReturn(IERC20 token, bytes memory data) private {\n        // We need to perform a low level call here, to bypass Solidity\u0027s return data size checking mechanism, since\n        // we\u0027re implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n        // the target address contains contract code and also asserts for success in the low-level call.\n\n        bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n        if (returndata.length \u003e 0) { // Return data is optional\n            // solhint-disable-next-line max-line-length\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n        }\n    }\n}\n"},"SafeMath.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\n/**\n * @dev Wrappers over Solidity\u0027s arithmetic operations with added overflow\n * checks.\n *\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\n * in bugs, because programmers usually assume that an overflow raises an\n * error, which is the standard behavior in high level programming languages.\n * `SafeMath` restores this intuition by reverting the transaction when an\n * operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it\u0027s recommended to use it always.\n */\nlibrary SafeMath {\n    /**\n     * @dev Returns the addition of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        uint256 c = a + b;\n        if (c \u003c a) return (false, 0);\n        return (true, c);\n    }\n\n    /**\n     * @dev Returns the substraction of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        if (b \u003e a) return (false, 0);\n        return (true, a - b);\n    }\n\n    /**\n     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        // Gas optimization: this is cheaper than requiring \u0027a\u0027 not being zero, but the\n        // benefit is lost if \u0027b\u0027 is also tested.\n        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n        if (a == 0) return (true, 0);\n        uint256 c = a * b;\n        if (c / a != b) return (false, 0);\n        return (true, c);\n    }\n\n    /**\n     * @dev Returns the division of two unsigned integers, with a division by zero flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        if (b == 0) return (false, 0);\n        return (true, a / b);\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        if (b == 0) return (false, 0);\n        return (true, a % b);\n    }\n\n    /**\n     * @dev Returns the addition of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity\u0027s `+` operator.\n     *\n     * Requirements:\n     *\n     * - Addition cannot overflow.\n     */\n    function add(uint256 a, uint256 b) internal pure returns (uint256) {\n        uint256 c = a + b;\n        require(c \u003e= a, \"SafeMath: addition overflow\");\n        return c;\n    }\n\n    /**\n     * @dev Returns the subtraction of two unsigned integers, reverting on\n     * overflow (when the result is negative).\n     *\n     * Counterpart to Solidity\u0027s `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n    function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n        require(b \u003c= a, \"SafeMath: subtraction overflow\");\n        return a - b;\n    }\n\n    /**\n     * @dev Returns the multiplication of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity\u0027s `*` operator.\n     *\n     * Requirements:\n     *\n     * - Multiplication cannot overflow.\n     */\n    function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n        if (a == 0) return 0;\n        uint256 c = a * b;\n        require(c / a == b, \"SafeMath: multiplication overflow\");\n        return c;\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers, reverting on\n     * division by zero. The result is rounded towards zero.\n     *\n     * Counterpart to Solidity\u0027s `/` operator. Note: this function uses a\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\n     * uses an invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b) internal pure returns (uint256) {\n        require(b \u003e 0, \"SafeMath: division by zero\");\n        return a / b;\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * reverting when dividing by zero.\n     *\n     * Counterpart to Solidity\u0027s `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n        require(b \u003e 0, \"SafeMath: modulo by zero\");\n        return a % b;\n    }\n\n    /**\n     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n     * overflow (when the result is negative).\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {trySub}.\n     *\n     * Counterpart to Solidity\u0027s `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b \u003c= a, errorMessage);\n        return a - b;\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers, reverting with custom message on\n     * division by zero. The result is rounded towards zero.\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {tryDiv}.\n     *\n     * Counterpart to Solidity\u0027s `/` operator. Note: this function uses a\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\n     * uses an invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b \u003e 0, errorMessage);\n        return a / b;\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * reverting with custom message when dividing by zero.\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {tryMod}.\n     *\n     * Counterpart to Solidity\u0027s `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b \u003e 0, errorMessage);\n        return a % b;\n    }\n}\n"},"UltraLightNodeV2.sol":{"content":"// SPDX-License-Identifier: BUSL-1.1\n\npragma solidity 0.7.6;\npragma abicoder v2;\n\nimport \"./Ownable.sol\";\nimport \"./SafeMath.sol\";\nimport \"./ReentrancyGuard.sol\";\nimport \"./IERC20.sol\";\nimport \"./SafeERC20.sol\";\n\nimport \"./ILayerZeroValidationLibrary.sol\";\nimport \"./ILayerZeroReceiver.sol\";\nimport \"./ILayerZeroTreasury.sol\";\nimport \"./ILayerZeroEndpoint.sol\";\n// v2\nimport \"./ILayerZeroMessagingLibraryV2.sol\";\nimport \"./ILayerZeroOracleV2.sol\";\nimport \"./ILayerZeroUltraLightNodeV2.sol\";\nimport \"./ILayerZeroRelayerV2.sol\";\nimport \"./NonceContract.sol\";\n\ncontract UltraLightNodeV2 is ILayerZeroMessagingLibraryV2, ILayerZeroUltraLightNodeV2, ReentrancyGuard, Ownable {\n    using SafeERC20 for IERC20;\n    using SafeMath for uint;\n\n    // Application config\n    uint public constant CONFIG_TYPE_INBOUND_PROOF_LIBRARY_VERSION = 1;\n    uint public constant CONFIG_TYPE_INBOUND_BLOCK_CONFIRMATIONS = 2;\n    uint public constant CONFIG_TYPE_RELAYER = 3;\n    uint public constant CONFIG_TYPE_OUTBOUND_PROOF_TYPE = 4;\n    uint public constant CONFIG_TYPE_OUTBOUND_BLOCK_CONFIRMATIONS = 5;\n    uint public constant CONFIG_TYPE_ORACLE = 6;\n\n    // Token and Contracts\n    IERC20 public layerZeroToken;\n    ILayerZeroTreasury public treasuryContract;\n\n    mapping(address =\u003e uint) public nativeFees;\n    uint public treasuryZROFees;\n\n    // User Application\n    mapping(address =\u003e mapping(uint16 =\u003e ApplicationConfiguration)) public appConfig; // app address =\u003e chainId =\u003e config\n    mapping(uint16 =\u003e ApplicationConfiguration) public defaultAppConfig; // default UA settings if no version specified\n    mapping(uint16 =\u003e mapping(uint16 =\u003e bytes)) public defaultAdapterParams;\n\n    // Validation\n    mapping(uint16 =\u003e mapping(uint16 =\u003e address)) public inboundProofLibrary; // chainId =\u003e library Id =\u003e inboundProofLibrary contract\n    mapping(uint16 =\u003e uint16) public maxInboundProofLibrary; // chainId =\u003e inboundProofLibrary\n    mapping(uint16 =\u003e mapping(uint16 =\u003e bool)) public supportedOutboundProof; // chainId =\u003e outboundProofType =\u003e enabled\n    mapping(uint16 =\u003e uint) public chainAddressSizeMap;\n    mapping(address =\u003e mapping(uint16 =\u003e mapping(bytes32 =\u003e mapping(bytes32 =\u003e uint)))) public hashLookup; //[oracle][srcChainId][blockhash][datahash] -\u003e confirmation\n    mapping(uint16 =\u003e bytes32) public ulnLookup; // remote ulns\n\n    ILayerZeroEndpoint public immutable endpoint;\n    uint16 public immutable localChainId;\n    NonceContract public immutable nonceContract;\n\n    constructor(address _endpoint, address _nonceContract, uint16 _localChainId) {\n        require(_endpoint != address(0x0), \"LayerZero: endpoint cannot be zero address\");\n        require(_nonceContract != address(0x0), \"LayerZero: nonceContract cannot be zero address\");\n        ILayerZeroEndpoint lzEndpoint = ILayerZeroEndpoint(_endpoint);\n        localChainId = _localChainId;\n        endpoint = lzEndpoint;\n        nonceContract = NonceContract(_nonceContract);\n    }\n\n    // only the endpoint can call SEND() and setConfig()\n    modifier onlyEndpoint() {\n        require(address(endpoint) == msg.sender, \"LayerZero: only endpoint\");\n        _;\n    }\n\n    //----------------------------------------------------------------------------------\n    // PROTOCOL\n    function validateTransactionProof(uint16 _srcChainId, address _dstAddress, uint _gasLimit, bytes32 _lookupHash, bytes32 _blockData, bytes calldata _transactionProof) external override {\n        // retrieve UA\u0027s configuration using the _dstAddress from arguments.\n        ApplicationConfiguration memory uaConfig = _getAppConfig(_srcChainId, _dstAddress);\n\n        // assert that the caller == UA\u0027s relayer\n        require(uaConfig.relayer == msg.sender, \"LayerZero: invalid relayer\");\n\n        LayerZeroPacket.Packet memory _packet;\n        uint remoteAddressSize = chainAddressSizeMap[_srcChainId];\n        require(remoteAddressSize != 0, \"LayerZero: incorrect remote address size\");\n        {\n            // assert that the data submitted by UA\u0027s oracle have no fewer confirmations than UA\u0027s configuration\n            uint storedConfirmations = hashLookup[uaConfig.oracle][_srcChainId][_lookupHash][_blockData];\n            require(storedConfirmations \u003e 0 \u0026\u0026 storedConfirmations \u003e= uaConfig.inboundBlockConfirmations, \"LayerZero: not enough block confirmations\");\n\n            // decode\n            address inboundProofLib = inboundProofLibrary[_srcChainId][uaConfig.inboundProofLibraryVersion];\n            _packet = ILayerZeroValidationLibrary(inboundProofLib).validateProof(_blockData, _transactionProof, remoteAddressSize);\n        }\n\n        // packet content assertion\n        require(ulnLookup[_srcChainId] == _packet.ulnAddress \u0026\u0026 _packet.ulnAddress != bytes32(0), \"LayerZero: invalid _packet.ulnAddress\");\n        require(_packet.srcChainId == _srcChainId, \"LayerZero: invalid srcChain Id\");\n        // failsafe because the remoteAddress size being passed into validateProof trims the address this should not hit\n        require(_packet.srcAddress.length == remoteAddressSize, \"LayerZero: invalid srcAddress size\");\n        require(_packet.dstChainId == localChainId, \"LayerZero: invalid dstChain Id\");\n        require(_packet.dstAddress == _dstAddress, \"LayerZero: invalid dstAddress\");\n\n        // if the dst is not a contract, then emit and return early. This will break inbound nonces, but this particular\n        // path is already broken and wont ever be able to deliver anyways\n        if (!_isContract(_dstAddress)) {\n            emit InvalidDst(_packet.srcChainId, _packet.srcAddress, _packet.dstAddress, _packet.nonce, keccak256(_packet.payload));\n            return;\n        }\n\n        bytes memory pathData = abi.encodePacked(_packet.srcAddress, _packet.dstAddress);\n        emit PacketReceived(_packet.srcChainId, _packet.srcAddress, _packet.dstAddress, _packet.nonce, keccak256(_packet.payload));\n        endpoint.receivePayload(_srcChainId, pathData, _dstAddress, _packet.nonce, _gasLimit, _packet.payload);\n    }\n\n    function send(address _ua, uint64, uint16 _dstChainId, bytes calldata _path, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable override onlyEndpoint {\n        address ua = _ua;\n        uint16 dstChainId = _dstChainId;\n        require(ulnLookup[dstChainId] != bytes32(0), \"LayerZero: dstChainId does not exist\");\n\n        bytes memory dstAddress;\n        uint64 nonce;\n        // code block for solving \u0027Stack Too Deep\u0027\n        {\n            uint chainAddressSize = chainAddressSizeMap[dstChainId];\n            // path = remoteAddress + localAddress\n            require(chainAddressSize != 0 \u0026\u0026 _path.length == 20 + chainAddressSize, \"LayerZero: incorrect remote address size\");\n            address srcInPath;\n            bytes memory path = _path; // copy to memory\n            assembly {\n                srcInPath := mload(add(add(path, 20), chainAddressSize)) // chainAddressSize + 20\n            }\n            require(ua == srcInPath, \"LayerZero: wrong path data\");\n            dstAddress = _path[0:chainAddressSize];\n            nonce = nonceContract.increment(dstChainId, ua, path);\n        }\n\n        bytes memory payload = _payload;\n        ApplicationConfiguration memory uaConfig = _getAppConfig(dstChainId, ua);\n\n        // compute all the fees\n        uint relayerFee = _handleRelayer(dstChainId, uaConfig, ua, payload.length, _adapterParams);\n        uint oracleFee = _handleOracle(dstChainId, uaConfig, ua);\n        uint nativeProtocolFee = _handleProtocolFee(relayerFee, oracleFee, ua, _zroPaymentAddress);\n\n        // total native fee, does not include ZRO protocol fee\n        uint totalNativeFee = relayerFee.add(oracleFee).add(nativeProtocolFee);\n\n        // assert the user has attached enough native token for this address\n        require(totalNativeFee \u003c= msg.value, \"LayerZero: not enough native for fees\");\n        // refund if they send too much\n        uint amount = msg.value.sub(totalNativeFee);\n        if (amount \u003e 0) {\n            (bool success, ) = _refundAddress.call{value: amount}(\"\");\n            require(success, \"LayerZero: failed to refund\");\n        }\n\n        // emit the data packet\n        bytes memory encodedPayload = abi.encodePacked(nonce, localChainId, ua, dstChainId, dstAddress, payload);\n        emit Packet(encodedPayload);\n    }\n\n    function _handleRelayer(uint16 _dstChainId, ApplicationConfiguration memory _uaConfig, address _ua, uint _payloadSize, bytes memory _adapterParams) internal returns (uint relayerFee) {\n        if (_adapterParams.length == 0) {\n            _adapterParams = defaultAdapterParams[_dstChainId][_uaConfig.outboundProofType];\n        }\n        address relayerAddress = _uaConfig.relayer;\n        ILayerZeroRelayerV2 relayer = ILayerZeroRelayerV2(relayerAddress);\n        relayerFee = relayer.assignJob(_dstChainId, _uaConfig.outboundProofType, _ua, _payloadSize, _adapterParams);\n\n        _creditNativeFee(relayerAddress, relayerFee);\n\n        // emit the param events\n        emit RelayerParams(_adapterParams, _uaConfig.outboundProofType);\n    }\n\n    function _handleOracle(uint16 _dstChainId, ApplicationConfiguration memory _uaConfig, address _ua) internal returns (uint oracleFee) {\n        address oracleAddress = _uaConfig.oracle;\n        oracleFee = ILayerZeroOracleV2(oracleAddress).assignJob(_dstChainId, _uaConfig.outboundProofType, _uaConfig.outboundBlockConfirmations, _ua);\n\n        _creditNativeFee(oracleAddress, oracleFee);\n    }\n\n    function _handleProtocolFee(uint _relayerFee, uint _oracleFee, address _ua, address _zroPaymentAddress) internal returns (uint protocolNativeFee) {\n        // if no ZRO token or not specifying a payment address, pay in native token\n        bool payInNative = _zroPaymentAddress == address(0x0) || address(layerZeroToken) == address(0x0);\n        uint protocolFee = treasuryContract.getFees(!payInNative, _relayerFee, _oracleFee);\n\n        if (protocolFee \u003e 0) {\n            if (payInNative) {\n                address treasuryAddress = address(treasuryContract);\n                _creditNativeFee(treasuryAddress, protocolFee);\n                protocolNativeFee = protocolFee;\n            } else {\n                // zro payment address must equal the ua or the tx.origin otherwise the transaction reverts\n                require(_zroPaymentAddress == _ua || _zroPaymentAddress == tx.origin, \"LayerZero: must be paid by sender or origin\");\n\n                // transfer the LayerZero token to this contract from the payee\n                layerZeroToken.safeTransferFrom(_zroPaymentAddress, address(this), protocolFee);\n\n                treasuryZROFees = treasuryZROFees.add(protocolFee);\n            }\n        }\n    }\n\n    function _creditNativeFee(address _receiver, uint _amount) internal {\n        nativeFees[_receiver] = nativeFees[_receiver].add(_amount);\n    }\n\n    // Can be called by any address to update a block header\n    // can only upload new block data or the same block data with more confirmations\n    function updateHash(uint16 _srcChainId, bytes32 _lookupHash, uint _confirmations, bytes32 _blockData) external override {\n        uint storedConfirmations = hashLookup[msg.sender][_srcChainId][_lookupHash][_blockData];\n\n        // if it has a record, requires a larger confirmation.\n        require(storedConfirmations \u003c _confirmations, \"LayerZero: oracle data can only update if it has more confirmations\");\n\n        // set the new information into storage\n        hashLookup[msg.sender][_srcChainId][_lookupHash][_blockData] = _confirmations;\n\n        emit HashReceived(_srcChainId, msg.sender, _lookupHash, _blockData, _confirmations);\n    }\n\n    //----------------------------------------------------------------------------------\n    // Other Library Interfaces\n\n    // default to DEFAULT setting if ZERO value\n    function getAppConfig(uint16 _remoteChainId, address _ua) external view override returns (ApplicationConfiguration memory) {\n        return _getAppConfig(_remoteChainId, _ua);\n    }\n\n    function _getAppConfig(uint16 _remoteChainId, address _ua) internal view returns (ApplicationConfiguration memory) {\n        ApplicationConfiguration memory config = appConfig[_ua][_remoteChainId];\n        ApplicationConfiguration storage defaultConfig = defaultAppConfig[_remoteChainId];\n\n        if (config.inboundProofLibraryVersion == 0) {\n            config.inboundProofLibraryVersion = defaultConfig.inboundProofLibraryVersion;\n        }\n\n        if (config.inboundBlockConfirmations == 0) {\n            config.inboundBlockConfirmations = defaultConfig.inboundBlockConfirmations;\n        }\n\n        if (config.relayer == address(0x0)) {\n            config.relayer = defaultConfig.relayer;\n        }\n\n        if (config.outboundProofType == 0) {\n            config.outboundProofType = defaultConfig.outboundProofType;\n        }\n\n        if (config.outboundBlockConfirmations == 0) {\n            config.outboundBlockConfirmations = defaultConfig.outboundBlockConfirmations;\n        }\n\n        if (config.oracle == address(0x0)) {\n            config.oracle = defaultConfig.oracle;\n        }\n\n        return config;\n    }\n\n    function setConfig(uint16 _remoteChainId, address _ua, uint _configType, bytes calldata _config) external override onlyEndpoint {\n        ApplicationConfiguration storage uaConfig = appConfig[_ua][_remoteChainId];\n        if (_configType == CONFIG_TYPE_INBOUND_PROOF_LIBRARY_VERSION) {\n            uint16 inboundProofLibraryVersion = abi.decode(_config, (uint16));\n            require(inboundProofLibraryVersion \u003c= maxInboundProofLibrary[_remoteChainId], \"LayerZero: invalid inbound proof library version\");\n            uaConfig.inboundProofLibraryVersion = inboundProofLibraryVersion;\n        } else if (_configType == CONFIG_TYPE_INBOUND_BLOCK_CONFIRMATIONS) {\n            uint64 blockConfirmations = abi.decode(_config, (uint64));\n            uaConfig.inboundBlockConfirmations = blockConfirmations;\n        } else if (_configType == CONFIG_TYPE_RELAYER) {\n            address relayer = abi.decode(_config, (address));\n            uaConfig.relayer = relayer;\n        } else if (_configType == CONFIG_TYPE_OUTBOUND_PROOF_TYPE) {\n            uint16 outboundProofType = abi.decode(_config, (uint16));\n            require(supportedOutboundProof[_remoteChainId][outboundProofType] || outboundProofType == 0, \"LayerZero: invalid outbound proof type\");\n            uaConfig.outboundProofType = outboundProofType;\n        } else if (_configType == CONFIG_TYPE_OUTBOUND_BLOCK_CONFIRMATIONS) {\n            uint64 blockConfirmations = abi.decode(_config, (uint64));\n            uaConfig.outboundBlockConfirmations = blockConfirmations;\n        } else if (_configType == CONFIG_TYPE_ORACLE) {\n            address oracle = abi.decode(_config, (address));\n            uaConfig.oracle = oracle;\n        } else {\n            revert(\"LayerZero: Invalid config type\");\n        }\n\n        emit AppConfigUpdated(_ua, _configType, _config);\n    }\n\n    function getConfig(uint16 _remoteChainId, address _ua, uint _configType) external view override returns (bytes memory) {\n        ApplicationConfiguration storage uaConfig = appConfig[_ua][_remoteChainId];\n\n        if (_configType == CONFIG_TYPE_INBOUND_PROOF_LIBRARY_VERSION) {\n            if (uaConfig.inboundProofLibraryVersion == 0) {\n                return abi.encode(defaultAppConfig[_remoteChainId].inboundProofLibraryVersion);\n            }\n            return abi.encode(uaConfig.inboundProofLibraryVersion);\n        } else if (_configType == CONFIG_TYPE_INBOUND_BLOCK_CONFIRMATIONS) {\n            if (uaConfig.inboundBlockConfirmations == 0) {\n                return abi.encode(defaultAppConfig[_remoteChainId].inboundBlockConfirmations);\n            }\n            return abi.encode(uaConfig.inboundBlockConfirmations);\n        } else if (_configType == CONFIG_TYPE_RELAYER) {\n            if (uaConfig.relayer == address(0x0)) {\n                return abi.encode(defaultAppConfig[_remoteChainId].relayer);\n            }\n            return abi.encode(uaConfig.relayer);\n        } else if (_configType == CONFIG_TYPE_OUTBOUND_PROOF_TYPE) {\n            if (uaConfig.outboundProofType == 0) {\n                return abi.encode(defaultAppConfig[_remoteChainId].outboundProofType);\n            }\n            return abi.encode(uaConfig.outboundProofType);\n        } else if (_configType == CONFIG_TYPE_OUTBOUND_BLOCK_CONFIRMATIONS) {\n            if (uaConfig.outboundBlockConfirmations == 0) {\n                return abi.encode(defaultAppConfig[_remoteChainId].outboundBlockConfirmations);\n            }\n            return abi.encode(uaConfig.outboundBlockConfirmations);\n        } else if (_configType == CONFIG_TYPE_ORACLE) {\n            if (uaConfig.oracle == address(0x0)) {\n                return abi.encode(defaultAppConfig[_remoteChainId].oracle);\n            }\n            return abi.encode(uaConfig.oracle);\n        } else {\n            revert(\"LayerZero: Invalid config type\");\n        }\n    }\n\n    // returns the native fee the UA pays to cover fees\n    function estimateFees(uint16 _dstChainId, address _ua, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParams) external view override returns (uint nativeFee, uint zroFee) {\n        ApplicationConfiguration memory uaConfig = _getAppConfig(_dstChainId, _ua);\n\n        // Relayer Fee\n        bytes memory adapterParams;\n        if (_adapterParams.length \u003e 0) {\n            adapterParams = _adapterParams;\n        } else {\n            adapterParams = defaultAdapterParams[_dstChainId][uaConfig.outboundProofType];\n        }\n        uint relayerFee = ILayerZeroRelayerV2(uaConfig.relayer).getFee(_dstChainId, uaConfig.outboundProofType, _ua, _payload.length, adapterParams);\n\n        // Oracle Fee\n        address ua = _ua; // stack too deep\n        uint oracleFee = ILayerZeroOracleV2(uaConfig.oracle).getFee(_dstChainId, uaConfig.outboundProofType, uaConfig.outboundBlockConfirmations, ua);\n\n        // LayerZero Fee\n        uint protocolFee = treasuryContract.getFees(_payInZRO, relayerFee, oracleFee);\n        _payInZRO ? zroFee = protocolFee : nativeFee = protocolFee;\n\n        // return the sum of fees\n        nativeFee = nativeFee.add(relayerFee).add(oracleFee);\n    }\n\n    //---------------------------------------------------------------------------\n    // Claim Fees\n\n    // universal withdraw ZRO token function\n    function withdrawZRO(address _to, uint _amount) external override nonReentrant {\n        require(msg.sender == address(treasuryContract), \"LayerZero: only treasury\");\n        treasuryZROFees = treasuryZROFees.sub(_amount);\n        layerZeroToken.safeTransfer(_to, _amount);\n        emit WithdrawZRO(msg.sender, _to, _amount);\n    }\n\n    // universal withdraw native token function.\n    // the source contract should perform all the authentication control\n    function withdrawNative(address payable _to, uint _amount) external override nonReentrant {\n        require(_to != address(0x0), \"LayerZero: _to cannot be zero address\");\n        nativeFees[msg.sender] = nativeFees[msg.sender].sub(_amount);\n\n        (bool success, ) = _to.call{value: _amount}(\"\");\n        require(success, \"LayerZero: withdraw failed\");\n        emit WithdrawNative(msg.sender, _to, _amount);\n    }\n\n    //---------------------------------------------------------------------------\n    // Owner calls, configuration only.\n    function setLayerZeroToken(address _layerZeroToken) external onlyOwner {\n        require(_layerZeroToken != address(0x0), \"LayerZero: _layerZeroToken cannot be zero address\");\n        layerZeroToken = IERC20(_layerZeroToken);\n        emit SetLayerZeroToken(_layerZeroToken);\n    }\n\n    function setTreasury(address _treasury) external onlyOwner {\n        require(_treasury != address(0x0), \"LayerZero: treasury cannot be zero address\");\n        treasuryContract = ILayerZeroTreasury(_treasury);\n        emit SetTreasury(_treasury);\n    }\n\n    function addInboundProofLibraryForChain(uint16 _chainId, address _library) external onlyOwner {\n        require(_library != address(0x0), \"LayerZero: library cannot be zero address\");\n        uint16 libId = maxInboundProofLibrary[_chainId];\n        require(libId \u003c 65535, \"LayerZero: can not add new library\");\n        maxInboundProofLibrary[_chainId] = ++libId;\n        inboundProofLibrary[_chainId][libId] = _library;\n        emit AddInboundProofLibraryForChain(_chainId, _library);\n    }\n\n    function enableSupportedOutboundProof(uint16 _chainId, uint16 _proofType) external onlyOwner {\n        supportedOutboundProof[_chainId][_proofType] = true;\n        emit EnableSupportedOutboundProof(_chainId, _proofType);\n    }\n\n    function setDefaultConfigForChainId(uint16 _chainId, uint16 _inboundProofLibraryVersion, uint64 _inboundBlockConfirmations, address _relayer, uint16 _outboundProofType, uint64 _outboundBlockConfirmations, address _oracle) external onlyOwner {\n        require(_inboundProofLibraryVersion \u003c= maxInboundProofLibrary[_chainId] \u0026\u0026 _inboundProofLibraryVersion \u003e 0, \"LayerZero: invalid inbound proof library version\");\n        require(_inboundBlockConfirmations \u003e 0, \"LayerZero: invalid inbound block confirmation\");\n        require(_relayer != address(0x0), \"LayerZero: invalid relayer address\");\n        require(supportedOutboundProof[_chainId][_outboundProofType], \"LayerZero: invalid outbound proof type\");\n        require(_outboundBlockConfirmations \u003e 0, \"LayerZero: invalid outbound block confirmation\");\n        require(_oracle != address(0x0), \"LayerZero: invalid oracle address\");\n        defaultAppConfig[_chainId] = ApplicationConfiguration(_inboundProofLibraryVersion, _inboundBlockConfirmations, _relayer, _outboundProofType, _outboundBlockConfirmations, _oracle);\n        emit SetDefaultConfigForChainId(_chainId, _inboundProofLibraryVersion, _inboundBlockConfirmations, _relayer, _outboundProofType, _outboundBlockConfirmations, _oracle);\n    }\n\n    function setDefaultAdapterParamsForChainId(uint16 _chainId, uint16 _proofType, bytes calldata _adapterParams) external onlyOwner {\n        defaultAdapterParams[_chainId][_proofType] = _adapterParams;\n        emit SetDefaultAdapterParamsForChainId(_chainId, _proofType, _adapterParams);\n    }\n\n    function setRemoteUln(uint16 _remoteChainId, bytes32 _remoteUln) external onlyOwner {\n        require(ulnLookup[_remoteChainId] == bytes32(0), \"LayerZero: remote uln already set\");\n        ulnLookup[_remoteChainId] = _remoteUln;\n        emit SetRemoteUln(_remoteChainId, _remoteUln);\n    }\n\n    function setChainAddressSize(uint16 _chainId, uint _size) external onlyOwner {\n        require(chainAddressSizeMap[_chainId] == 0, \"LayerZero: remote chain address size already set\");\n        chainAddressSizeMap[_chainId] = _size;\n        emit SetChainAddressSize(_chainId, _size);\n    }\n\n    //----------------------------------------------------------------------------------\n    // view functions\n\n    function accruedNativeFee(address _address) external view override returns (uint) {\n        return nativeFees[_address];\n    }\n\n    function getOutboundNonce(uint16 _chainId, bytes calldata _path) external view override returns (uint64) {\n        return nonceContract.outboundNonce(_chainId, _path);\n    }\n\n    function _isContract(address addr) internal view returns (bool) {\n        uint size;\n        assembly {\n            size := extcodesize(addr)\n        }\n        return size != 0;\n    }\n}\n"}}

// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 * 
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 * 
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     * 
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())
            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())
            switch result
            // delegatecall returns 0 on error.
            case 0 { revert(0, returndatasize()) }
            default { return(0, returndatasize()) }
        }
    }
    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal virtual view returns (address);
    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     * 
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal {
        _beforeFallback();
        _delegate(_implementation());
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback () payable external {
        _fallback();
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive () payable external {
        _fallback();
    }
    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     * 
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./Proxy.sol";
import "../utils/Address.sol";
/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 * 
 * Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
 * {TransparentUpgradeableProxy}.
 */
contract UpgradeableProxy is Proxy {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     * 
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _setImplementation(_logic);
        if(_data.length > 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool success,) = _logic.delegatecall(_data);
            require(success);
        }
    }
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal override view returns (address impl) {
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            impl := sload(slot)
        }
    }
    /**
     * @dev Upgrades the proxy to a new implementation.
     * 
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "UpgradeableProxy: new implementation is not a contract");
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newImplementation)
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }
    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../openzeppelin/proxy/UpgradeableProxy.sol";
/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative inerface of your proxy.
 */
contract OptimizedTransparentUpgradeableProxy is UpgradeableProxy {
    address internal immutable _ADMIN;
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {UpgradeableProxy-constructor}.
     */
    constructor(
        address initialLogic,
        address initialAdmin,
        bytes memory _data
    ) payable UpgradeableProxy(initialLogic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        bytes32 slot = _ADMIN_SLOT;
        _ADMIN = initialAdmin;
        // still store it to work with EIP-1967
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, initialAdmin)
        }
    }
    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 private constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }
    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address) {
        return _admin();
    }
    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address) {
        return _implementation();
    }
    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeTo(newImplementation);
    }
    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeTo(newImplementation);
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = newImplementation.delegatecall(data);
        require(success);
    }
    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view returns (address adm) {
        return _ADMIN;
    }
    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _admin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
import "./interfaces/ILayerZeroReceiver.sol";
import "./interfaces/ILayerZeroEndpoint.sol";
import "./interfaces/ILayerZeroMessagingLibrary.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract Endpoint is Ownable, ILayerZeroEndpoint {
    uint16 public immutable chainId;
    // installed libraries and reserved versions
    uint16 public constant BLOCK_VERSION = 65535;
    uint16 public constant DEFAULT_VERSION = 0;
    uint16 public latestVersion;
    mapping(uint16 => ILayerZeroMessagingLibrary) public libraryLookup; // version -> ILayerZeroEndpointLibrary
    // default send/receive libraries
    uint16 public defaultSendVersion;
    uint16 public defaultReceiveVersion;
    ILayerZeroMessagingLibrary public defaultSendLibrary;
    address public defaultReceiveLibraryAddress;
    struct LibraryConfig {
        uint16 sendVersion;
        uint16 receiveVersion;
        address receiveLibraryAddress;
        ILayerZeroMessagingLibrary sendLibrary;
    }
    struct StoredPayload {
        uint64 payloadLength;
        address dstAddress;
        bytes32 payloadHash;
    }
    // user app config = [uaAddress]
    mapping(address => LibraryConfig) public uaConfigLookup;
    // inboundNonce = [srcChainId][srcAddress].
    mapping(uint16 => mapping(bytes => uint64)) public inboundNonce;
    // outboundNonce = [dstChainId][srcAddress].
    mapping(uint16 => mapping(address => uint64)) public outboundNonce;
    // storedPayload = [srcChainId][srcAddress]
    mapping(uint16 => mapping(bytes => StoredPayload)) public storedPayload;
    // library versioning events
    event NewLibraryVersionAdded(uint16 version);
    event DefaultSendVersionSet(uint16 version);
    event DefaultReceiveVersionSet(uint16 version);
    event UaSendVersionSet(address ua, uint16 version);
    event UaReceiveVersionSet(address ua, uint16 version);
    event UaForceResumeReceive(uint16 chainId, bytes srcAddress);
    // payload events
    event PayloadCleared(uint16 srcChainId, bytes srcAddress, uint64 nonce, address dstAddress);
    event PayloadStored(uint16 srcChainId, bytes srcAddress, address dstAddress, uint64 nonce, bytes payload, bytes reason);
    constructor(uint16 _chainId) {
        chainId = _chainId;
    }
    //---------------------------------------------------------------------------
    // send and receive nonreentrant lock
    uint8 internal constant _NOT_ENTERED = 1;
    uint8 internal constant _ENTERED = 2;
    uint8 internal _send_entered_state = 1;
    uint8 internal _receive_entered_state = 1;
    modifier sendNonReentrant() {
        require(_send_entered_state == _NOT_ENTERED, "LayerZero: no send reentrancy");
        _send_entered_state = _ENTERED;
        _;
        _send_entered_state = _NOT_ENTERED;
    }
    modifier receiveNonReentrant() {
        require(_receive_entered_state == _NOT_ENTERED, "LayerZero: no receive reentrancy");
        _receive_entered_state = _ENTERED;
        _;
        _receive_entered_state = _NOT_ENTERED;
    }
    // BLOCK_VERSION is also a valid version
    modifier validVersion(uint16 _version) {
        require(_version <= latestVersion || _version == BLOCK_VERSION, "LayerZero: invalid messaging library version");
        _;
    }
    //---------------------------------------------------------------------------
    // User Application Calls - Endpoint Interface
    function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable override sendNonReentrant {
        LibraryConfig storage uaConfig = uaConfigLookup[msg.sender];
        uint64 nonce = ++outboundNonce[_dstChainId][msg.sender];
        _getSendLibrary(uaConfig).send{value: msg.value}(msg.sender, nonce, _dstChainId, _destination, _payload, _refundAddress, _zroPaymentAddress, _adapterParams);
    }
    //---------------------------------------------------------------------------
    // authenticated Library (msg.sender) Calls to pass through Endpoint to UA (dstAddress)
    function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external override receiveNonReentrant {
        // assert and increment the nonce. no message shuffling
        require(_nonce == ++inboundNonce[_srcChainId][_srcAddress], "LayerZero: wrong nonce");
        LibraryConfig storage uaConfig = uaConfigLookup[_dstAddress];
        // authentication to prevent cross-version message validation
        // protects against a malicious library from passing arbitrary data
        if (uaConfig.receiveVersion == DEFAULT_VERSION) {
            require(defaultReceiveLibraryAddress == msg.sender, "LayerZero: invalid default library");
        } else {
            require(uaConfig.receiveLibraryAddress == msg.sender, "LayerZero: invalid library");
        }
        // block if any message blocking
        StoredPayload storage sp = storedPayload[_srcChainId][_srcAddress];
        require(sp.payloadHash == bytes32(0), "LayerZero: in message blocking");
        try ILayerZeroReceiver(_dstAddress).lzReceive{gas: _gasLimit}(_srcChainId, _srcAddress, _nonce, _payload) {
            // success, do nothing, end of the message delivery
        } catch (bytes memory reason) {
            // revert nonce if any uncaught errors/exceptions if the ua chooses the blocking mode
            storedPayload[_srcChainId][_srcAddress] = StoredPayload(uint64(_payload.length), _dstAddress, keccak256(_payload));
            emit PayloadStored(_srcChainId, _srcAddress, _dstAddress, _nonce, _payload, reason);
        }
    }
    function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external override receiveNonReentrant {
        StoredPayload storage sp = storedPayload[_srcChainId][_srcAddress];
        require(sp.payloadHash != bytes32(0), "LayerZero: no stored payload");
        require(_payload.length == sp.payloadLength && keccak256(_payload) == sp.payloadHash, "LayerZero: invalid payload");
        address dstAddress = sp.dstAddress;
        // empty the storedPayload
        sp.payloadLength = 0;
        sp.dstAddress = address(0);
        sp.payloadHash = bytes32(0);
        uint64 nonce = inboundNonce[_srcChainId][_srcAddress];
        ILayerZeroReceiver(dstAddress).lzReceive(_srcChainId, _srcAddress, nonce, _payload);
        emit PayloadCleared(_srcChainId, _srcAddress, nonce, dstAddress);
    }
    //---------------------------------------------------------------------------
    // Owner Calls, only new library version upgrade (3 steps)
    // note libraryLookup[0] = 0x0, no library implementation
    // LIBRARY UPGRADE step 1: set _newLayerZeroLibraryAddress be the new version
    function newVersion(address _newLayerZeroLibraryAddress) external onlyOwner {
        require(_newLayerZeroLibraryAddress != address(0x0), "LayerZero: new version cannot be zero address");
        require(latestVersion < 65535, "LayerZero: can not add new messaging library");
        latestVersion++;
        libraryLookup[latestVersion] = ILayerZeroMessagingLibrary(_newLayerZeroLibraryAddress);
        emit NewLibraryVersionAdded(latestVersion);
    }
    // LIBRARY UPGRADE step 2: stop sending messages from the old version
    function setDefaultSendVersion(uint16 _newDefaultSendVersion) external onlyOwner validVersion(_newDefaultSendVersion) {
        require(_newDefaultSendVersion != DEFAULT_VERSION, "LayerZero: default send version must > 0");
        defaultSendVersion = _newDefaultSendVersion;
        defaultSendLibrary = libraryLookup[defaultSendVersion];
        emit DefaultSendVersionSet(_newDefaultSendVersion);
    }
    // LIBRARY UPGRADE step 3: stop receiving messages from the old version
    function setDefaultReceiveVersion(uint16 _newDefaultReceiveVersion) external onlyOwner validVersion(_newDefaultReceiveVersion) {
        require(_newDefaultReceiveVersion != DEFAULT_VERSION, "LayerZero: default receive version must > 0");
        defaultReceiveVersion = _newDefaultReceiveVersion;
        defaultReceiveLibraryAddress = address(libraryLookup[defaultReceiveVersion]);
        emit DefaultReceiveVersionSet(_newDefaultReceiveVersion);
    }
    //---------------------------------------------------------------------------
    // User Application Calls - UA set/get Interface
    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external override validVersion(_version) {
        if (_version == DEFAULT_VERSION) {
            require(defaultSendVersion == defaultReceiveVersion, "LayerZero: can not set Config during DEFAULT migration");
            _version = defaultSendVersion;
        }
        require(_version != BLOCK_VERSION, "LayerZero: can not set config for BLOCK_VERSION");
        libraryLookup[_version].setConfig(_chainId, msg.sender, _configType, _config);
    }
    // Migration step 1: set the send version
    // Define what library the UA points too
    function setSendVersion(uint16 _newVersion) external override validVersion(_newVersion) {
        // write into config
        LibraryConfig storage uaConfig = uaConfigLookup[msg.sender];
        uaConfig.sendVersion = _newVersion;
        // the libraryLookup[BLOCK_VERSION || DEFAULT_VERSION] = 0x0
        uaConfig.sendLibrary = libraryLookup[_newVersion];
        emit UaSendVersionSet(msg.sender, _newVersion);
    }
    // Migration step 2: set the receive version
    // after all messages sent from the old version are received
    // the UA can now safely switch to the new receive version
    // it is the UA's responsibility make sure all messages from the old version are processed
    function setReceiveVersion(uint16 _newVersion) external override validVersion(_newVersion) {
        // write into config
        LibraryConfig storage uaConfig = uaConfigLookup[msg.sender];
        uaConfig.receiveVersion = _newVersion;
        // the libraryLookup[BLOCK_VERSION || DEFAULT_VERSION] = 0x0
        uaConfig.receiveLibraryAddress = address(libraryLookup[_newVersion]);
        emit UaReceiveVersionSet(msg.sender, _newVersion);
    }
    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external override {
        StoredPayload storage sp = storedPayload[_srcChainId][_srcAddress];
        // revert if no messages are cached. safeguard malicious UA behaviour
        require(sp.payloadHash != bytes32(0), "LayerZero: no stored payload");
        require(sp.dstAddress == msg.sender, "LayerZero: invalid caller");
        // empty the storedPayload
        sp.payloadLength = 0;
        sp.dstAddress = address(0);
        sp.payloadHash = bytes32(0);
        // emit the event with the new nonce
        emit UaForceResumeReceive(_srcChainId, _srcAddress);
    }
    //---------------------------------------------------------------------------
    // view helper function
    function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParams) external view override returns (uint nativeFee, uint zroFee) {
        LibraryConfig storage uaConfig = uaConfigLookup[_userApplication];
        ILayerZeroMessagingLibrary lib = uaConfig.sendVersion == DEFAULT_VERSION ? defaultSendLibrary : uaConfig.sendLibrary;
        return lib.estimateFees(_dstChainId, _userApplication, _payload, _payInZRO, _adapterParams);
    }
    function _getSendLibrary(LibraryConfig storage uaConfig) internal view returns (ILayerZeroMessagingLibrary) {
        if (uaConfig.sendVersion == DEFAULT_VERSION) {
            // check if the in send-blocking upgrade
            require(defaultSendVersion != BLOCK_VERSION, "LayerZero: default in BLOCK_VERSION");
            return defaultSendLibrary;
        } else {
            // check if the in send-blocking upgrade
            require(uaConfig.sendVersion != BLOCK_VERSION, "LayerZero: in BLOCK_VERSION");
            return uaConfig.sendLibrary;
        }
    }
    function getSendLibraryAddress(address _userApplication) external view override returns (address sendLibraryAddress) {
        LibraryConfig storage uaConfig = uaConfigLookup[_userApplication];
        uint16 sendVersion = uaConfig.sendVersion;
        require(sendVersion != BLOCK_VERSION, "LayerZero: send version is BLOCK_VERSION");
        if (sendVersion == DEFAULT_VERSION) {
            require(defaultSendVersion != BLOCK_VERSION, "LayerZero: send version (default) is BLOCK_VERSION");
            sendLibraryAddress = address(defaultSendLibrary);
        } else {
            sendLibraryAddress = address(uaConfig.sendLibrary);
        }
    }
    function getReceiveLibraryAddress(address _userApplication) external view override returns (address receiveLibraryAddress) {
        LibraryConfig storage uaConfig = uaConfigLookup[_userApplication];
        uint16 receiveVersion = uaConfig.receiveVersion;
        require(receiveVersion != BLOCK_VERSION, "LayerZero: receive version is BLOCK_VERSION");
        if (receiveVersion == DEFAULT_VERSION) {
            require(defaultReceiveVersion != BLOCK_VERSION, "LayerZero: receive version (default) is BLOCK_VERSION");
            receiveLibraryAddress = defaultReceiveLibraryAddress;
        } else {
            receiveLibraryAddress = uaConfig.receiveLibraryAddress;
        }
    }
    function isSendingPayload() external view override returns (bool) {
        return _send_entered_state == _ENTERED;
    }
    function isReceivingPayload() external view override returns (bool) {
        return _receive_entered_state == _ENTERED;
    }
    function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view override returns (uint64) {
        return inboundNonce[_srcChainId][_srcAddress];
    }
    function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view override returns (uint64) {
        return outboundNonce[_dstChainId][_srcAddress];
    }
    function getChainId() external view override returns (uint16) {
        return chainId;
    }
    function getSendVersion(address _userApplication) external view override returns (uint16) {
        LibraryConfig storage uaConfig = uaConfigLookup[_userApplication];
        return uaConfig.sendVersion == DEFAULT_VERSION ? defaultSendVersion : uaConfig.sendVersion;
    }
    function getReceiveVersion(address _userApplication) external view override returns (uint16) {
        LibraryConfig storage uaConfig = uaConfigLookup[_userApplication];
        return uaConfig.receiveVersion == DEFAULT_VERSION ? defaultReceiveVersion : uaConfig.receiveVersion;
    }
    function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view override validVersion(_version) returns (bytes memory) {
        if (_version == DEFAULT_VERSION) {
            require(defaultSendVersion == defaultReceiveVersion, "LayerZero: no DEFAULT config while migration");
            _version = defaultSendVersion;
        }
        require(_version != BLOCK_VERSION, "LayerZero: can not get config for BLOCK_VERSION");
        return libraryLookup[_version].getConfig(_chainId, _userApplication, _configType);
    }
    function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view override returns (bool) {
        StoredPayload storage sp = storedPayload[_srcChainId][_srcAddress];
        return sp.payloadHash != bytes32(0);
    }
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;
interface ILayerZeroReceiver {
    // @notice LayerZero endpoint will invoke this function to deliver the message on the destination
    // @param _srcChainId - the source endpoint identifier
    // @param _srcAddress - the source sending contract address from the source chain
    // @param _nonce - the ordered message nonce
    // @param _payload - the signed payload is the UA bytes has encoded to be sent
    function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) external;
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;
import "./ILayerZeroUserApplicationConfig.sol";
interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {
    // @notice send a LayerZero message to the specified address at a LayerZero endpoint.
    // @param _dstChainId - the destination chain identifier
    // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains
    // @param _payload - a custom bytes payload to send to the destination contract
    // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address
    // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction
    // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination
    function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;
    // @notice used by the messaging library to publish verified payload
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source contract (as bytes) at the source chain
    // @param _dstAddress - the address on destination chain
    // @param _nonce - the unbound message ordering nonce
    // @param _gasLimit - the gas limit for external contract execution
    // @param _payload - verified payload to send to the destination contract
    function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external;
    // @notice get the inboundNonce of a receiver from a source chain which could be EVM or non-EVM chain
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64);
    // @notice get the outboundNonce from this source chain which, consequently, is always an EVM
    // @param _srcAddress - the source chain contract address
    function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64);
    // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery
    // @param _dstChainId - the destination chain identifier
    // @param _userApplication - the user app address on this EVM chain
    // @param _payload - the custom message to send over LayerZero
    // @param _payInZRO - if false, user app pays the protocol fee in native token
    // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain
    function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);
    // @notice get this Endpoint's immutable source identifier
    function getChainId() external view returns (uint16);
    // @notice the interface to retry failed message on this Endpoint destination
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    // @param _payload - the payload to be retried
    function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external;
    // @notice query if any STORED payload (message blocking) at the endpoint.
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool);
    // @notice query if the _libraryAddress is valid for sending msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getSendLibraryAddress(address _userApplication) external view returns (address);
    // @notice query if the _libraryAddress is valid for receiving msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getReceiveLibraryAddress(address _userApplication) external view returns (address);
    // @notice query if the non-reentrancy guard for send() is on
    // @return true if the guard is on. false otherwise
    function isSendingPayload() external view returns (bool);
    // @notice query if the non-reentrancy guard for receive() is on
    // @return true if the guard is on. false otherwise
    function isReceivingPayload() external view returns (bool);
    // @notice get the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _userApplication - the contract address of the user application
    // @param _configType - type of configuration. every messaging library has its own convention.
    function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);
    // @notice get the send() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getSendVersion(address _userApplication) external view returns (uint16);
    // @notice get the lzReceive() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getReceiveVersion(address _userApplication) external view returns (uint16);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.7.0;
import "./ILayerZeroUserApplicationConfig.sol";
interface ILayerZeroMessagingLibrary {
    // send(), messages will be inflight.
    function send(address _userApplication, uint64 _lastNonce, uint16 _chainId, bytes calldata _destination, bytes calldata _payload, address payable refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;
    // estimate native fee at the send side
    function estimateFees(uint16 _chainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);
    //---------------------------------------------------------------------------
    // setConfig / getConfig are User Application (UA) functions to specify Oracle, Relayer, blockConfirmations, libraryVersion
    function setConfig(uint16 _chainId, address _userApplication, uint _configType, bytes calldata _config) external;
    function getConfig(uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../utils/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;
interface ILayerZeroUserApplicationConfig {
    // @notice set the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _configType - type of configuration. every messaging library has its own convention.
    // @param _config - configuration in the bytes. can encode arbitrary content.
    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external;
    // @notice set the send() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setSendVersion(uint16 _version) external;
    // @notice set the lzReceive() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setReceiveVersion(uint16 _version) external;
    // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload
    // @param _srcChainId - the chainId of the source chain
    // @param _srcAddress - the contract address of the source contract at the source chain
    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
import "./interfaces/ILayerZeroEndpoint.sol";
contract NonceContract {
    ILayerZeroEndpoint public immutable endpoint;
    // outboundNonce = [dstChainId][remoteAddress + localAddress]
    mapping(uint16 => mapping(bytes => uint64)) public outboundNonce;
    constructor(address _endpoint) {
        endpoint = ILayerZeroEndpoint(_endpoint);
    }
    function increment(uint16 _chainId, address _ua, bytes calldata _path) external returns (uint64) {
        require(endpoint.getSendLibraryAddress(_ua) == msg.sender, "NonceContract: msg.sender is not valid sendlibrary");
        return ++outboundNonce[_chainId][_path];
    }
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;
import "./ILayerZeroUserApplicationConfig.sol";
interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {
    // @notice send a LayerZero message to the specified address at a LayerZero endpoint.
    // @param _dstChainId - the destination chain identifier
    // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains
    // @param _payload - a custom bytes payload to send to the destination contract
    // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address
    // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction
    // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination
    function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;
    // @notice used by the messaging library to publish verified payload
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source contract (as bytes) at the source chain
    // @param _dstAddress - the address on destination chain
    // @param _nonce - the unbound message ordering nonce
    // @param _gasLimit - the gas limit for external contract execution
    // @param _payload - verified payload to send to the destination contract
    function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external;
    // @notice get the inboundNonce of a receiver from a source chain which could be EVM or non-EVM chain
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64);
    // @notice get the outboundNonce from this source chain which, consequently, is always an EVM
    // @param _srcAddress - the source chain contract address
    function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64);
    // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery
    // @param _dstChainId - the destination chain identifier
    // @param _userApplication - the user app address on this EVM chain
    // @param _payload - the custom message to send over LayerZero
    // @param _payInZRO - if false, user app pays the protocol fee in native token
    // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain
    function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);
    // @notice get this Endpoint's immutable source identifier
    function getChainId() external view returns (uint16);
    // @notice the interface to retry failed message on this Endpoint destination
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    // @param _payload - the payload to be retried
    function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external;
    // @notice query if any STORED payload (message blocking) at the endpoint.
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool);
    // @notice query if the _libraryAddress is valid for sending msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getSendLibraryAddress(address _userApplication) external view returns (address);
    // @notice query if the _libraryAddress is valid for receiving msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getReceiveLibraryAddress(address _userApplication) external view returns (address);
    // @notice query if the non-reentrancy guard for send() is on
    // @return true if the guard is on. false otherwise
    function isSendingPayload() external view returns (bool);
    // @notice query if the non-reentrancy guard for receive() is on
    // @return true if the guard is on. false otherwise
    function isReceivingPayload() external view returns (bool);
    // @notice get the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _userApplication - the contract address of the user application
    // @param _configType - type of configuration. every messaging library has its own convention.
    function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);
    // @notice get the send() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getSendVersion(address _userApplication) external view returns (uint16);
    // @notice get the lzReceive() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getReceiveVersion(address _userApplication) external view returns (uint16);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;
interface ILayerZeroUserApplicationConfig {
    // @notice set the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _configType - type of configuration. every messaging library has its own convention.
    // @param _config - configuration in the bytes. can encode arbitrary content.
    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external;
    // @notice set the send() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setSendVersion(uint16 _version) external;
    // @notice set the lzReceive() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setReceiveVersion(uint16 _version) external;
    // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload
    // @param _srcChainId - the chainId of the source chain
    // @param _srcAddress - the contract address of the source contract at the source chain
    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0-rc.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/ERC1967/ERC1967Proxy.sol)
pragma solidity ^0.8.0;
import "../Proxy.sol";
import "./ERC1967Upgrade.sol";
/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _upgradeToAndCall(_logic, _data, false);
    }
    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0-rc.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
import "../beacon/IBeacon.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";
/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }
    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }
    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }
    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);
    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view virtual returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }
    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);
    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }
    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(Address.isContract(IBeacon(newBeacon).implementation()), "ERC1967: beacon implementation is not a contract");
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0-rc.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())
            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())
            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);
    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }
    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0-rc.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }
    struct BooleanSlot {
        bool value;
    }
    struct Bytes32Slot {
        bytes32 value;
    }
    struct Uint256Slot {
        uint256 value;
    }
    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/transparent/TransparentUpgradeableProxy.sol)
pragma solidity ^0.8.0;
import "../openzeppelin/proxy/ERC1967/ERC1967Proxy.sol";
/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 */
contract OptimizedTransparentUpgradeableProxy is ERC1967Proxy {
    address internal immutable _ADMIN;
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(
        address _logic,
        address admin_,
        bytes memory _data
    ) payable ERC1967Proxy(_logic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        _ADMIN = admin_;
        // still store it to work with EIP-1967
        bytes32 slot = _ADMIN_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, admin_)
        }
        emit AdminChanged(address(0), admin_);
    }
    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _getAdmin()) {
            _;
        } else {
            _fallback();
        }
    }
    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address admin_) {
        admin_ = _getAdmin();
    }
    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address implementation_) {
        implementation_ = _implementation();
    }
    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeToAndCall(newImplementation, bytes(""), false);
    }
    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeToAndCall(newImplementation, data, true);
    }
    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }
    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
    function _getAdmin() internal view virtual override returns (address) {
        return _ADMIN;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
import "./interfaces/ILayerZeroTreasury.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./interfaces/ILayerZeroUltraLightNodeV2.sol";
contract TreasuryV2 is ILayerZeroTreasury, Ownable {
    using SafeMath for uint;
    uint public nativeBP;
    uint public zroFee;
    bool public feeEnabled;
    bool public zroEnabled;
    ILayerZeroUltraLightNodeV2 public uln;
    event NativeBP(uint bp);
    event ZroFee(uint zroFee);
    event FeeEnabled(bool feeEnabled);
    event ZroEnabled(bool zroEnabled);
    constructor(address _ulnv2) {
        uln = ILayerZeroUltraLightNodeV2(_ulnv2);
    }
    function getFees(bool payInZro, uint relayerFee, uint oracleFee) external view override returns (uint) {
        if (feeEnabled) {
            if (payInZro) {
                require(zroEnabled, "LayerZero: ZRO is not enabled");
                return zroFee;
            } else {
                return relayerFee.add(oracleFee).mul(nativeBP).div(10000);
            }
        }
        return 0;
    }
    function setFeeEnabled(bool _feeEnabled) external onlyOwner {
        feeEnabled = _feeEnabled;
        emit FeeEnabled(_feeEnabled);
    }
    function setZroEnabled(bool _zroEnabled) external onlyOwner {
        zroEnabled = _zroEnabled;
        emit ZroEnabled(_zroEnabled);
    }
    function setNativeBP(uint _nativeBP) external onlyOwner {
        nativeBP = _nativeBP;
        emit NativeBP(_nativeBP);
    }
    function setZroFee(uint _zroFee) external onlyOwner {
        zroFee = _zroFee;
        emit ZroFee(_zroFee);
    }
    function withdrawZROFromULN(address _to, uint _amount) external onlyOwner {
        uln.withdrawZRO(_to, _amount);
    }
    function withdrawNativeFromULN(address payable _to, uint _amount) external onlyOwner {
        uln.withdrawNative(_to, _amount);
    }
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;
interface ILayerZeroTreasury {
    function getFees(bool payInZro, uint relayerFee, uint oracleFee) external view returns (uint);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../utils/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }
    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }
    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.7.0;
pragma abicoder v2;
interface ILayerZeroUltraLightNodeV2 {
    // Relayer functions
    function validateTransactionProof(uint16 _srcChainId, address _dstAddress, uint _gasLimit, bytes32 _lookupHash, bytes32 _blockData, bytes calldata _transactionProof) external;
    // an Oracle delivers the block data using updateHash()
    function updateHash(uint16 _srcChainId, bytes32 _lookupHash, uint _confirmations, bytes32 _blockData) external;
    // can only withdraw the receivable of the msg.sender
    function withdrawNative(address payable _to, uint _amount) external;
    function withdrawZRO(address _to, uint _amount) external;
    // view functions
    function getAppConfig(uint16 _remoteChainId, address _userApplicationAddress) external view returns (ApplicationConfiguration memory);
    function accruedNativeFee(address _address) external view returns (uint);
    struct ApplicationConfiguration {
        uint16 inboundProofLibraryVersion;
        uint64 inboundBlockConfirmations;
        address relayer;
        uint16 outboundProofType;
        uint64 outboundBlockConfirmations;
        address oracle;
    }
    event HashReceived(uint16 indexed srcChainId, address indexed oracle, bytes32 lookupHash, bytes32 blockData, uint confirmations);
    event RelayerParams(bytes adapterParams, uint16 outboundProofType);
    event Packet(bytes payload);
    event InvalidDst(uint16 indexed srcChainId, bytes srcAddress, address indexed dstAddress, uint64 nonce, bytes32 payloadHash);
    event PacketReceived(uint16 indexed srcChainId, bytes srcAddress, address indexed dstAddress, uint64 nonce, bytes32 payloadHash);
    event AppConfigUpdated(address indexed userApplication, uint indexed configType, bytes newConfig);
    event AddInboundProofLibraryForChain(uint16 indexed chainId, address lib);
    event EnableSupportedOutboundProof(uint16 indexed chainId, uint16 proofType);
    event SetChainAddressSize(uint16 indexed chainId, uint size);
    event SetDefaultConfigForChainId(uint16 indexed chainId, uint16 inboundProofLib, uint64 inboundBlockConfirm, address relayer, uint16 outboundProofType, uint64 outboundBlockConfirm, address oracle);
    event SetDefaultAdapterParamsForChainId(uint16 indexed chainId, uint16 indexed proofType, bytes adapterParams);
    event SetLayerZeroToken(address indexed tokenAddress);
    event SetRemoteUln(uint16 indexed chainId, bytes32 uln);
    event SetTreasury(address indexed treasuryAddress);
    event WithdrawZRO(address indexed msgSender, address indexed to, uint amount);
    event WithdrawNative(address indexed msgSender, address indexed to, uint amount);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}