52 lines
2.0 KiB
Solidity
52 lines
2.0 KiB
Solidity
pragma solidity =0.5.16;
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import './interfaces/IUniswapV2Factory.sol';
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import './UniswapV2Exchange.sol';
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import './interfaces/IUniswapV2Exchange.sol';
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contract UniswapV2Factory is IUniswapV2Factory {
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address public feeTo;
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address public feeToSetter;
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mapping(address => mapping(address => address)) public getExchange;
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address[] public allExchanges;
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event ExchangeCreated(address indexed token0, address indexed token1, address exchange, uint);
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constructor(address _feeToSetter) public {
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feeToSetter = _feeToSetter;
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}
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function allExchangesLength() external view returns (uint) {
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return allExchanges.length;
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}
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function createExchange(address tokenA, address tokenB) external returns (address exchange) {
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require(tokenA != tokenB, 'UniswapV2: IDENTICAL_ADDRESSES');
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(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
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require(token0 != address(0), 'UniswapV2: ZERO_ADDRESS');
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require(getExchange[token0][token1] == address(0), 'UniswapV2: EXCHANGE_EXISTS');
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require(getExchange[token1][token0] == address(0), 'UniswapV2: EXCHANGE_EXISTS');
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bytes memory exchangeBytecode = type(UniswapV2Exchange).creationCode;
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bytes32 salt = keccak256(abi.encodePacked(token0, token1));
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assembly {
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exchange := create2(0, add(exchangeBytecode, 32), mload(exchangeBytecode), salt)
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}
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IUniswapV2Exchange(exchange).initialize(token0, token1);
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getExchange[token0][token1] = exchange;
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getExchange[token1][token0] = exchange;
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allExchanges.push(exchange);
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emit ExchangeCreated(token0, token1, exchange, allExchanges.length);
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}
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function setFeeTo(address _feeTo) external {
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require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');
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feeTo = _feeTo;
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}
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function setFeeToSetter(address _feeToSetter) external {
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require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');
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feeToSetter = _feeToSetter;
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}
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}
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