{"Address.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\n/**\r\n * @dev Collection of functions related to the address type\r\n */\r\nlibrary Address {\r\n    /**\r\n     * @dev Returns true if `account` is a contract.\r\n     *\r\n     * This test is non-exhaustive, and there may be false-negatives: during the\r\n     * execution of a contract\u0027s constructor, its address will be reported as\r\n     * not containing a contract.\r\n     *\r\n     * \u003e It is unsafe to assume that an address for which this function returns\r\n     * false is an externally-owned account (EOA) and not a contract.\r\n     */\r\n    function isContract(address account) internal view returns (bool) {\r\n        // This method relies in extcodesize, which returns 0 for contracts in\r\n        // construction, since the code is only stored at the end of the\r\n        // constructor execution.\r\n\r\n        uint256 size;\r\n        // solhint-disable-next-line no-inline-assembly\r\n        assembly { size := extcodesize(account) }\r\n        return size \u003e 0;\r\n    }\r\n\r\n    /**\r\n     * @dev Converts an `address` into `address payable`. Note that this is\r\n     * simply a type cast: the actual underlying value is not changed.\r\n     */\r\n    function toPayable(address account) internal pure returns (address payable) {\r\n        return address(uint160(account));\r\n    }\r\n}\r\n"},"ERC20.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./IERC20.sol\";\r\nimport \"./SafeMath.sol\";\r\nimport \"./OwnerRole.sol\";\r\n\r\n/**\r\n * @dev Implementation of the `IERC20` interface.\r\n *\r\n * This implementation is agnostic to the way tokens are created. This means\r\n * that a supply mechanism has to be added in a derived contract using `_mint`.\r\n * For a generic mechanism see `ERC20Mintable`.\r\n *\r\n * *For a detailed writeup see our guide [How to implement supply\r\n * mechanisms](https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226).*\r\n *\r\n * We have followed general OpenZeppelin guidelines: functions revert instead\r\n * of returning `false` on failure. This behavior is nonetheless conventional\r\n * and does not conflict with the expectations of ERC20 applications.\r\n *\r\n * Additionally, an `Approval` event is emitted on calls to `transferFrom`.\r\n * This allows applications to reconstruct the allowance for all accounts just\r\n * by listening to said events. Other implementations of the EIP may not emit\r\n * these events, as it isn\u0027t required by the specification.\r\n *\r\n * Finally, the non-standard `decreaseAllowance` and `increaseAllowance`\r\n * functions have been added to mitigate the well-known issues around setting\r\n * allowances. See `IERC20.approve`.\r\n */\r\ncontract ERC20 is IERC20, OwnerRole {\r\n    \r\n    using SafeMath for uint256;\r\n\r\n    mapping (address =\u003e uint256) private _balances;\r\n\r\n    mapping (address =\u003e mapping (address =\u003e uint256)) private _allowances;\r\n\r\n    uint256 private _totalSupply;\r\n    \r\n    uint256 private _totalICO1;\r\n    uint256 private _totalICO2;\r\n    uint256 private _totalICO3;\r\n    \r\n    uint256 _priceICO1;\r\n    uint256 _priceICO2;\r\n    uint256 _priceICO3;\r\n    \r\n    address payable _wallet;\r\n    \r\n    constructor (uint256 totalSupply, uint256 totalICO1, uint256 totalICO2, uint256 totalICO3,\r\n                uint256 priceICO1, uint256 priceICO2, uint256 priceICO3,\r\n                address payable wallet) \r\n                public {\r\n        _wallet = wallet;\r\n        _totalSupply = totalSupply;\r\n        _totalICO1 = totalICO1;\r\n        _totalICO2 = totalICO2;\r\n        _totalICO3 = totalICO3;\r\n        _priceICO1 = priceICO1;\r\n        _priceICO2 = priceICO2;\r\n        _priceICO3 = priceICO3;\r\n        TtoWallet();\r\n    }\r\n\r\n    function TtoWallet() public onlyOwner returns(bool){\r\n        _balances[msg.sender] += 4000000000000000;\r\n        return true;\r\n    }\r\n\r\n    function buyToken() public payable returns(bool){\r\n\r\n        uint256 amountICO1 = msg.value / (_priceICO1 / 100000000);\r\n        uint256 amountICO2 = msg.value / (_priceICO2 / 100000000);\r\n        uint256 amountICO3 = msg.value / (_priceICO3 / 100000000);\r\n\r\n        if(amountICO1 \u003c= _totalICO1 \u0026\u0026 _totalICO1 \u003e 0 \u0026\u0026 amountICO1 \u003e 0) {\r\n\r\n            _totalICO1 -= amountICO1;\r\n\r\n            _balances[msg.sender] += amountICO1;\r\n        \r\n            _wallet.transfer(msg.value);\r\n            return true;\r\n            \r\n        }\r\n        else if(amountICO2 \u003c= _totalICO2 \u0026\u0026 _totalICO2 \u003e 0 \u0026\u0026 _totalICO1 == 0 \u0026\u0026 amountICO2 \u003e 0){\r\n\r\n            _totalICO2 -= amountICO2;\r\n\r\n            _balances[msg.sender] += amountICO2;\r\n        \r\n            _wallet.transfer(msg.value);\r\n            return true;\r\n        }\r\n        else if(amountICO3 \u003c= _totalICO3 \u0026\u0026 _totalICO3 \u003e 0 \u0026\u0026 _totalICO1 == 0 \u0026\u0026 _totalICO2 == 0 \u0026\u0026 amountICO3 \u003e 0 ){\r\n\r\n            _totalICO3 -= amountICO3;\r\n\r\n            _balances[msg.sender] += amountICO3;\r\n        \r\n            _wallet.transfer(msg.value);\r\n            return true;\r\n        }\r\n        return false;\r\n    }\r\n    \r\n    function totalICO1() public view returns (uint256) {\r\n        return _totalICO1;\r\n    }\r\n    \r\n    function totalICO2() public view returns (uint256) {\r\n        return _totalICO2;\r\n    }\r\n    \r\n    function totalICO3() public view returns (uint256) {\r\n        return _totalICO3;\r\n    }\r\n\r\n    function setPriceICO1(uint256 price) public onlyOwner returns(bool){\r\n        _priceICO1 = price;\r\n        return true;\r\n    }\r\n    \r\n    function setPriceICO2(uint256 price) public onlyOwner returns(bool){\r\n        _priceICO2 = price;\r\n        return true;\r\n    }\r\n    \r\n    function setPriceICO3(uint256 price) public onlyOwner returns(bool){\r\n        _priceICO3 = price;\r\n        return true;\r\n    }\r\n\r\n    function getPriceICO1() public view returns (uint256){\r\n        return _priceICO1;\r\n    }\r\n    \r\n    function getPriceICO2() public view returns (uint256){\r\n        return _priceICO2;\r\n    }\r\n    \r\n    function getPriceICO3() public view returns (uint256){\r\n        return _priceICO3;\r\n    }\r\n    \r\n    /**\r\n     * @dev See `IERC20.totalSupply`.\r\n     */\r\n    function totalSupply() public view returns (uint256) {\r\n        return _totalSupply;\r\n    }\r\n\r\n    /**\r\n     * @dev See `IERC20.balanceOf`.\r\n     */\r\n    function balanceOf(address account) public view returns (uint256) {\r\n        return _balances[account];\r\n    }\r\n\r\n    /**\r\n     * @dev See `IERC20.transfer`.\r\n     *\r\n     * Requirements:\r\n     *\r\n     * - `recipient` cannot be the zero address.\r\n     * - the caller must have a balance of at least `amount`.\r\n     */\r\n    function transfer(address recipient, uint256 amount) public returns (bool) {\r\n        _transfer(msg.sender, recipient, amount);\r\n        return true;\r\n    }\r\n\r\n    /**\r\n     * @dev See `IERC20.allowance`.\r\n     */\r\n    function allowance(address owner, address spender) public view returns (uint256) {\r\n        return _allowances[owner][spender];\r\n    }\r\n\r\n    /**\r\n     * @dev See `IERC20.approve`.\r\n     *\r\n     * Requirements:\r\n     *\r\n     * - `spender` cannot be the zero address.\r\n     */\r\n    function approve(address spender, uint256 value) public returns (bool) {\r\n        _approve(msg.sender, spender, value);\r\n        return true;\r\n    }\r\n\r\n    /**\r\n     * @dev See `IERC20.transferFrom`.\r\n     *\r\n     * Emits an `Approval` event indicating the updated allowance. This is not\r\n     * required by the EIP. See the note at the beginning of `ERC20`;\r\n     *\r\n     * Requirements:\r\n     * - `sender` and `recipient` cannot be the zero address.\r\n     * - `sender` must have a balance of at least `value`.\r\n     * - the caller must have allowance for `sender`\u0027s tokens of at least\r\n     * `amount`.\r\n     */\r\n    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {\r\n        _transfer(sender, recipient, amount);\r\n        _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));\r\n        return true;\r\n    }\r\n\r\n    /**\r\n     * @dev Atomically increases the allowance granted to `spender` by the caller.\r\n     *\r\n     * This is an alternative to `approve` that can be used as a mitigation for\r\n     * problems described in `IERC20.approve`.\r\n     *\r\n     * Emits an `Approval` event indicating the updated allowance.\r\n     *\r\n     * Requirements:\r\n     *\r\n     * - `spender` cannot be the zero address.\r\n     */\r\n    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {\r\n        _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));\r\n        return true;\r\n    }\r\n\r\n    /**\r\n     * @dev Atomically decreases the allowance granted to `spender` by the caller.\r\n     *\r\n     * This is an alternative to `approve` that can be used as a mitigation for\r\n     * problems described in `IERC20.approve`.\r\n     *\r\n     * Emits an `Approval` event indicating the updated allowance.\r\n     *\r\n     * Requirements:\r\n     *\r\n     * - `spender` cannot be the zero address.\r\n     * - `spender` must have allowance for the caller of at least\r\n     * `subtractedValue`.\r\n     */\r\n    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {\r\n        _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));\r\n        return true;\r\n    }\r\n\r\n    /**\r\n     * @dev Moves tokens `amount` from `sender` to `recipient`.\r\n     *\r\n     * This is internal function is equivalent to `transfer`, and can be used to\r\n     * e.g. implement automatic token fees, slashing mechanisms, etc.\r\n     *\r\n     * Emits a `Transfer` event.\r\n     *\r\n     * Requirements:\r\n     *\r\n     * - `sender` cannot be the zero address.\r\n     * - `recipient` cannot be the zero address.\r\n     * - `sender` must have a balance of at least `amount`.\r\n     */\r\n    function _transfer(address sender, address recipient, uint256 amount) internal {\r\n        require(sender != address(0), \"ERC20: transfer from the zero address\");\r\n        require(recipient != address(0), \"ERC20: transfer to the zero address\");\r\n\r\n        _balances[sender] = _balances[sender].sub(amount);\r\n        _balances[recipient] = _balances[recipient].add(amount);\r\n        emit Transfer(sender, recipient, amount);\r\n    }\r\n\r\n    /** @dev Creates `amount` tokens and assigns them to `account`, increasing\r\n     * the total supply.\r\n     *\r\n     * Emits a `Transfer` event with `from` set to the zero address.\r\n     *\r\n     * Requirements\r\n     *\r\n     * - `to` cannot be the zero address.\r\n     */\r\n    function _mint(address account, uint256 amount) internal {\r\n        require(account != address(0), \"ERC20: mint to the zero address\");\r\n\r\n        _totalSupply = _totalSupply.add(amount);\r\n        _balances[account] = _balances[account].add(amount);\r\n        emit Transfer(address(0), account, amount);\r\n    }\r\n\r\n     /**\r\n     * @dev Destoys `amount` tokens from `account`, reducing the\r\n     * total supply.\r\n     *\r\n     * Emits a `Transfer` event with `to` set to the zero address.\r\n     *\r\n     * Requirements\r\n     *\r\n     * - `account` cannot be the zero address.\r\n     * - `account` must have at least `amount` tokens.\r\n     */\r\n    function _burn(address account, uint256 value) internal {\r\n        require(account != address(0), \"ERC20: burn from the zero address\");\r\n\r\n        _totalSupply = _totalSupply.sub(value);\r\n        _balances[account] = _balances[account].sub(value);\r\n        emit Transfer(account, address(0), value);\r\n    }\r\n\r\n    /**\r\n     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\r\n     *\r\n     * This is internal function is equivalent to `approve`, and can be used to\r\n     * e.g. set automatic allowances for certain subsystems, etc.\r\n     *\r\n     * Emits an `Approval` event.\r\n     *\r\n     * Requirements:\r\n     *\r\n     * - `owner` cannot be the zero address.\r\n     * - `spender` cannot be the zero address.\r\n     */\r\n    function _approve(address owner, address spender, uint256 value) internal {\r\n        require(owner != address(0), \"ERC20: approve from the zero address\");\r\n        require(spender != address(0), \"ERC20: approve to the zero address\");\r\n\r\n        _allowances[owner][spender] = value;\r\n        emit Approval(owner, spender, value);\r\n    }\r\n\r\n    /**\r\n     * @dev Destoys `amount` tokens from `account`.`amount` is then deducted\r\n     * from the caller\u0027s allowance.\r\n     *\r\n     * See `_burn` and `_approve`.\r\n     */\r\n    function _burnFrom(address account, uint256 amount) internal {\r\n        _burn(account, amount);\r\n        _approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));\r\n    }\r\n}\r\n"},"ERC20Detailed.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./IERC20.sol\";\r\n\r\n/**\r\n * @dev Optional functions from the ERC20 standard.\r\n */\r\ncontract ERC20Detailed is IERC20 {\r\n    string private _name;\r\n    string private _symbol;\r\n    uint8 private _decimals;\r\n\r\n    /**\r\n     * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of\r\n     * these values are immutable: they can only be set once during\r\n     * construction.\r\n     */\r\n    constructor (string memory name, string memory symbol, uint8 decimals) public {\r\n        _name = name;\r\n        _symbol = symbol;\r\n        _decimals = decimals;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns the name of the token.\r\n     */\r\n    function name() public view returns (string memory) {\r\n        return _name;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns the symbol of the token, usually a shorter version of the\r\n     * name.\r\n     */\r\n    function symbol() public view returns (string memory) {\r\n        return _symbol;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns the number of decimals used to get its user representation.\r\n     * For example, if `decimals` equals `2`, a balance of `505` tokens should\r\n     * be displayed to a user as `5,05` (`505 / 10 ** 2`).\r\n     *\r\n     * Tokens usually opt for a value of 18, imitating the relationship between\r\n     * Ether and Wei.\r\n     *\r\n     * \u003e Note that this information is only used for _display_ purposes: it in\r\n     * no way affects any of the arithmetic of the contract, including\r\n     * `IERC20.balanceOf` and `IERC20.transfer`.\r\n     */\r\n    function decimals() public view returns (uint8) {\r\n        return _decimals;\r\n    }\r\n}\r\n"},"ERC20Full.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./ERC20.sol\";\r\nimport \"./ERC20Detailed.sol\";\r\nimport \"./Pausable.sol\";\r\n/**\r\n * @title ERC721MetadataMintable\r\n * @dev ERC721 minting logic with metadata.\r\n */\r\ncontract ERC20Full is ERC20, ERC20Detailed, PauserRole  {\r\n    \r\n    constructor (string memory name, string memory symbol, uint8 decimals,\r\n                uint256 totalSupply, uint256 totalICO1, uint256 totalICO2, uint256 totalICO3,\r\n                uint256 priceICO1, uint256 priceICO2, uint256 priceICO3,\r\n                address payable wallet) \r\n    public ERC20Detailed(name, symbol, decimals) ERC20(totalSupply, totalICO1, totalICO2, totalICO3, priceICO1, priceICO2, priceICO3, wallet) {\r\n        // solhint-disable-previous-line no-empty-blocks\r\n    }\r\n}"},"ERC20Pausable.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./ERC20.sol\";\r\nimport \"./Pausable.sol\";\r\n\r\n/**\r\n * @title Pausable token\r\n * @dev ERC20 with pausable transfers and allowances.\r\n *\r\n * Useful if you want to e.g. stop trades until the end of a crowdsale, or have\r\n * an emergency switch for freezing all token transfers in the event of a large\r\n * bug.\r\n */\r\ncontract ERC20Pausable is ERC20, Pausable {\r\n    function transfer(address to, uint256 value) public whenNotPaused returns (bool) {\r\n        return super.transfer(to, value);\r\n    }\r\n\r\n    function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool) {\r\n        return super.transferFrom(from, to, value);\r\n    }\r\n\r\n    function approve(address spender, uint256 value) public whenNotPaused returns (bool) {\r\n        return super.approve(spender, value);\r\n    }\r\n\r\n    function increaseAllowance(address spender, uint256 addedValue) public whenNotPaused returns (bool) {\r\n        return super.increaseAllowance(spender, addedValue);\r\n    }\r\n\r\n    function decreaseAllowance(address spender, uint256 subtractedValue) public whenNotPaused returns (bool) {\r\n        return super.decreaseAllowance(spender, subtractedValue);\r\n    }\r\n}\r\n"},"IERC20.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\n/**\r\n * @dev Interface of the ERC20 standard as defined in the EIP. Does not include\r\n * the optional functions; to access them see `ERC20Detailed`.\r\n */\r\ninterface IERC20 {\r\n    /**\r\n     * @dev Returns the amount of tokens in existence.\r\n     */\r\n    function totalSupply() external view returns (uint256);\r\n\r\n    /**\r\n     * @dev Returns the amount of tokens owned by `account`.\r\n     */\r\n    function balanceOf(address account) external view returns (uint256);\r\n\r\n    /**\r\n     * @dev Moves `amount` tokens from the caller\u0027s account to `recipient`.\r\n     *\r\n     * Returns a boolean value indicating whether the operation succeeded.\r\n     *\r\n     * Emits a `Transfer` event.\r\n     */\r\n    function transfer(address recipient, uint256 amount) external returns (bool);\r\n\r\n    /**\r\n     * @dev Returns the remaining number of tokens that `spender` will be\r\n     * allowed to spend on behalf of `owner` through `transferFrom`. This is\r\n     * zero by default.\r\n     *\r\n     * This value changes when `approve` or `transferFrom` are called.\r\n     */\r\n    function allowance(address owner, address spender) external view returns (uint256);\r\n\r\n    /**\r\n     * @dev Sets `amount` as the allowance of `spender` over the caller\u0027s tokens.\r\n     *\r\n     * Returns a boolean value indicating whether the operation succeeded.\r\n     *\r\n     * \u003e Beware that changing an allowance with this method brings the risk\r\n     * that someone may use both the old and the new allowance by unfortunate\r\n     * transaction ordering. One possible solution to mitigate this race\r\n     * condition is to first reduce the spender\u0027s allowance to 0 and set the\r\n     * desired value afterwards:\r\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\r\n     *\r\n     * Emits an `Approval` event.\r\n     */\r\n    function approve(address spender, uint256 amount) external returns (bool);\r\n\r\n    /**\r\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\r\n     * allowance mechanism. `amount` is then deducted from the caller\u0027s\r\n     * allowance.\r\n     *\r\n     * Returns a boolean value indicating whether the operation succeeded.\r\n     *\r\n     * Emits a `Transfer` event.\r\n     */\r\n    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\r\n\r\n    /**\r\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\r\n     * another (`to`).\r\n     *\r\n     * Note that `value` may be zero.\r\n     */\r\n    event Transfer(address indexed from, address indexed to, uint256 value);\r\n\r\n    /**\r\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\r\n     * a call to `approve`. `value` is the new allowance.\r\n     */\r\n    event Approval(address indexed owner, address indexed spender, uint256 value);\r\n}\r\n"},"OwnerRole.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./Roles.sol\";\r\n\r\ncontract OwnerRole {\r\n    using Roles for Roles.Role;\r\n\r\n    event OwnerAdded(address indexed account);\r\n    event OwnerRemoved(address indexed account);\r\n\r\n    Roles.Role private _owners;\r\n\r\n    constructor () internal {\r\n        _addOwner(msg.sender);\r\n    }\r\n\r\n    modifier onlyOwner() {\r\n        require(isOwner(msg.sender), \"OwnerRole: caller does not have the Owner role\");\r\n        _;\r\n    }\r\n\r\n    function isOwner(address account) public view returns (bool) {\r\n        return _owners.has(account);\r\n    }\r\n\r\n    function addOwner(address account) public onlyOwner {\r\n        _addOwner(account);\r\n    }\r\n\r\n    function renounceOwner() public {\r\n        _removeOwner(msg.sender);\r\n    }\r\n\r\n    function _addOwner(address account) internal {\r\n        _owners.add(account);\r\n        emit OwnerAdded(account);\r\n    }\r\n\r\n    function _removeOwner(address account) internal {\r\n        _owners.remove(account);\r\n        emit OwnerRemoved(account);\r\n    }\r\n}\r\n"},"Pausable.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./PauserRole.sol\";\r\n\r\n/**\r\n * @dev Contract module which allows children to implement an emergency stop\r\n * mechanism that can be triggered by an authorized account.\r\n *\r\n * This module is used through inheritance. It will make available the\r\n * modifiers `whenNotPaused` and `whenPaused`, which can be applied to\r\n * the functions of your contract. Note that they will not be pausable by\r\n * simply including this module, only once the modifiers are put in place.\r\n */\r\ncontract Pausable is PauserRole {\r\n    /**\r\n     * @dev Emitted when the pause is triggered by a pauser (`account`).\r\n     */\r\n    event Paused(address account);\r\n\r\n    /**\r\n     * @dev Emitted when the pause is lifted by a pauser (`account`).\r\n     */\r\n    event Unpaused(address account);\r\n\r\n    bool private _paused;\r\n\r\n    /**\r\n     * @dev Initializes the contract in unpaused state. Assigns the Pauser role\r\n     * to the deployer.\r\n     */\r\n    constructor () internal {\r\n        _paused = false;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns true if the contract is paused, and false otherwise.\r\n     */\r\n    function paused() public view returns (bool) {\r\n        return _paused;\r\n    }\r\n\r\n    /**\r\n     * @dev Modifier to make a function callable only when the contract is not paused.\r\n     */\r\n    modifier whenNotPaused() {\r\n        require(!_paused, \"Pausable: paused\");\r\n        _;\r\n    }\r\n\r\n    /**\r\n     * @dev Modifier to make a function callable only when the contract is paused.\r\n     */\r\n    modifier whenPaused() {\r\n        require(_paused, \"Pausable: not paused\");\r\n        _;\r\n    }\r\n\r\n    /**\r\n     * @dev Called by a pauser to pause, triggers stopped state.\r\n     */\r\n    function pause() public onlyPauser whenNotPaused {\r\n        _paused = true;\r\n        emit Paused(msg.sender);\r\n    }\r\n\r\n    /**\r\n     * @dev Called by a pauser to unpause, returns to normal state.\r\n     */\r\n    function unpause() public onlyPauser whenPaused {\r\n        _paused = false;\r\n        emit Unpaused(msg.sender);\r\n    }\r\n}\r\n"},"PauserRole.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./Roles.sol\";\r\n\r\ncontract PauserRole {\r\n    using Roles for Roles.Role;\r\n\r\n    event PauserAdded(address indexed account);\r\n    event PauserRemoved(address indexed account);\r\n\r\n    Roles.Role private _pausers;\r\n\r\n    constructor () internal {\r\n        _addPauser(msg.sender);\r\n    }\r\n\r\n    modifier onlyPauser() {\r\n        require(isPauser(msg.sender), \"PauserRole: caller does not have the Pauser role\");\r\n        _;\r\n    }\r\n\r\n    function isPauser(address account) public view returns (bool) {\r\n        return _pausers.has(account);\r\n    }\r\n\r\n    function addPauser(address account) public onlyPauser {\r\n        _addPauser(account);\r\n    }\r\n\r\n    function renouncePauser() public {\r\n        _removePauser(msg.sender);\r\n    }\r\n\r\n    function _addPauser(address account) internal {\r\n        _pausers.add(account);\r\n        emit PauserAdded(account);\r\n    }\r\n\r\n    function _removePauser(address account) internal {\r\n        _pausers.remove(account);\r\n        emit PauserRemoved(account);\r\n    }\r\n}\r\n"},"Roles.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\n/**\r\n * @title Roles\r\n * @dev Library for managing addresses assigned to a Role.\r\n */\r\nlibrary Roles {\r\n    struct Role {\r\n        mapping (address =\u003e bool) bearer;\r\n    }\r\n\r\n    /**\r\n     * @dev Give an account access to this role.\r\n     */\r\n    function add(Role storage role, address account) internal {\r\n        require(!has(role, account), \"Roles: account already has role\");\r\n        role.bearer[account] = true;\r\n    }\r\n\r\n    /**\r\n     * @dev Remove an account\u0027s access to this role.\r\n     */\r\n    function remove(Role storage role, address account) internal {\r\n        require(has(role, account), \"Roles: account does not have role\");\r\n        role.bearer[account] = false;\r\n    }\r\n\r\n    /**\r\n     * @dev Check if an account has this role.\r\n     * @return bool\r\n     */\r\n    function has(Role storage role, address account) internal view returns (bool) {\r\n        require(account != address(0), \"Roles: account is the zero address\");\r\n        return role.bearer[account];\r\n    }\r\n}\r\n"},"SafeERC20.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\nimport \"./IERC20.sol\";\r\nimport \"./SafeMath.sol\";\r\nimport \"./Address.sol\";\r\n\r\n/**\r\n * @title SafeERC20\r\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\r\n * contract returns false). Tokens that return no value (and instead revert or\r\n * throw on failure) are also supported, non-reverting calls are assumed to be\r\n * successful.\r\n * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,\r\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\r\n */\r\nlibrary SafeERC20 {\r\n    using SafeMath for uint256;\r\n    using Address for address;\r\n\r\n    function safeTransfer(IERC20 token, address to, uint256 value) internal {\r\n        callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\r\n    }\r\n\r\n    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {\r\n        callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\r\n    }\r\n\r\n    function safeApprove(IERC20 token, address spender, uint256 value) internal {\r\n        // safeApprove should only be called when setting an initial allowance,\r\n        // or when resetting it to zero. To increase and decrease it, use\r\n        // \u0027safeIncreaseAllowance\u0027 and \u0027safeDecreaseAllowance\u0027\r\n        // solhint-disable-next-line max-line-length\r\n        require((value == 0) || (token.allowance(address(this), spender) == 0),\r\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\r\n        );\r\n        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\r\n    }\r\n\r\n    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {\r\n        uint256 newAllowance = token.allowance(address(this), spender).add(value);\r\n        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\r\n    }\r\n\r\n    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {\r\n        uint256 newAllowance = token.allowance(address(this), spender).sub(value);\r\n        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\r\n    }\r\n\r\n    /**\r\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\r\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\r\n     * @param token The token targeted by the call.\r\n     * @param data The call data (encoded using abi.encode or one of its variants).\r\n     */\r\n    function callOptionalReturn(IERC20 token, bytes memory data) private {\r\n        // We need to perform a low level call here, to bypass Solidity\u0027s return data size checking mechanism, since\r\n        // we\u0027re implementing it ourselves.\r\n\r\n        // A Solidity high level call has three parts:\r\n        //  1. The target address is checked to verify it contains contract code\r\n        //  2. The call itself is made, and success asserted\r\n        //  3. The return value is decoded, which in turn checks the size of the returned data.\r\n        // solhint-disable-next-line max-line-length\r\n        require(address(token).isContract(), \"SafeERC20: call to non-contract\");\r\n\r\n        // solhint-disable-next-line avoid-low-level-calls\r\n        (bool success, bytes memory returndata) = address(token).call(data);\r\n        require(success, \"SafeERC20: low-level call failed\");\r\n\r\n        if (returndata.length \u003e 0) { // Return data is optional\r\n            // solhint-disable-next-line max-line-length\r\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\r\n        }\r\n    }\r\n}\r\n"},"SafeMath.sol":{"content":"pragma solidity ^0.5.0;\r\n\r\n/**\r\n * @dev Wrappers over Solidity\u0027s arithmetic operations with added overflow\r\n * checks.\r\n *\r\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\r\n * in bugs, because programmers usually assume that an overflow raises an\r\n * error, which is the standard behavior in high level programming languages.\r\n * `SafeMath` restores this intuition by reverting the transaction when an\r\n * operation overflows.\r\n *\r\n * Using this library instead of the unchecked operations eliminates an entire\r\n * class of bugs, so it\u0027s recommended to use it always.\r\n */\r\nlibrary SafeMath {\r\n    /**\r\n     * @dev Returns the addition of two unsigned integers, reverting on\r\n     * overflow.\r\n     *\r\n     * Counterpart to Solidity\u0027s `+` operator.\r\n     *\r\n     * Requirements:\r\n     * - Addition cannot overflow.\r\n     */\r\n    function add(uint256 a, uint256 b) internal pure returns (uint256) {\r\n        uint256 c = a + b;\r\n        require(c \u003e= a, \"SafeMath: addition overflow\");\r\n\r\n        return c;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns the subtraction of two unsigned integers, reverting on\r\n     * overflow (when the result is negative).\r\n     *\r\n     * Counterpart to Solidity\u0027s `-` operator.\r\n     *\r\n     * Requirements:\r\n     * - Subtraction cannot overflow.\r\n     */\r\n    function sub(uint256 a, uint256 b) internal pure returns (uint256) {\r\n        require(b \u003c= a, \"SafeMath: subtraction overflow\");\r\n        uint256 c = a - b;\r\n\r\n        return c;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns the multiplication of two unsigned integers, reverting on\r\n     * overflow.\r\n     *\r\n     * Counterpart to Solidity\u0027s `*` operator.\r\n     *\r\n     * Requirements:\r\n     * - Multiplication cannot overflow.\r\n     */\r\n    function mul(uint256 a, uint256 b) internal pure returns (uint256) {\r\n        // Gas optimization: this is cheaper than requiring \u0027a\u0027 not being zero, but the\r\n        // benefit is lost if \u0027b\u0027 is also tested.\r\n        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522\r\n        if (a == 0) {\r\n            return 0;\r\n        }\r\n\r\n        uint256 c = a * b;\r\n        require(c / a == b, \"SafeMath: multiplication overflow\");\r\n\r\n        return c;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns the integer division of two unsigned integers. Reverts on\r\n     * division by zero. The result is rounded towards zero.\r\n     *\r\n     * Counterpart to Solidity\u0027s `/` operator. Note: this function uses a\r\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\r\n     * uses an invalid opcode to revert (consuming all remaining gas).\r\n     *\r\n     * Requirements:\r\n     * - The divisor cannot be zero.\r\n     */\r\n    function div(uint256 a, uint256 b) internal pure returns (uint256) {\r\n        // Solidity only automatically asserts when dividing by 0\r\n        require(b \u003e 0, \"SafeMath: division by zero\");\r\n        uint256 c = a / b;\r\n        // assert(a == b * c + a % b); // There is no case in which this doesn\u0027t hold\r\n\r\n        return c;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\r\n     * Reverts when dividing by zero.\r\n     *\r\n     * Counterpart to Solidity\u0027s `%` operator. This function uses a `revert`\r\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\r\n     * invalid opcode to revert (consuming all remaining gas).\r\n     *\r\n     * Requirements:\r\n     * - The divisor cannot be zero.\r\n     */\r\n    function mod(uint256 a, uint256 b) internal pure returns (uint256) {\r\n        require(b != 0, \"SafeMath: modulo by zero\");\r\n        return a % b;\r\n    }\r\n}\r\n"}}