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// SPDX-License-Identifier: MIT
pragma solidity >=0.7.6;
pragma abicoder v2;
interface IERC20 {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
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// File: contracts/interfaces/IUniswapV2Pair.sol
pragma solidity >=0.5.0;
interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);
    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint value) external returns (bool);
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract GGold is ERC20("GGold", "GGOLD"), Ownable {
    mapping(address => bool) public managers;
    function addManager(address _address) external onlyOwner {
        managers[_address] = true;
    }
    function removeManager(address _address) external onlyOwner {
        managers[_address] = false;
    }
    function mint(address _to, uint _amount) external {
        require(managers[msg.sender] == true, "This address is not allowed to interact with the contract");
        _mint(_to, _amount);
    }
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// 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;
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// File: contracts/interfaces/IFireBirdFormula.sol
// SPDX-License-Identifier: SEE LICENSE IN LICENSE
pragma solidity >=0.5.16;
/*
    Bancor Formula interface
*/
interface IFireBirdFormula {
    function getFactoryReserveAndWeights(address factory, address pair, address tokenA, uint8 dexId) external view returns (
        address tokenB,
        uint reserveA,
        uint reserveB,
        uint32 tokenWeightA,
        uint32 tokenWeightB,
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