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This commit is contained in:
Noah Zinsmeister
2020-01-24 11:26:00 -05:00
parent a55aa4bfed
commit 7c6d60dcc1
5 changed files with 90 additions and 80 deletions
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22
contracts/UniswapV2Factory.sol
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@ -1,14 +1,14 @@
pragma solidity =0.5.16;
import "./interfaces/IUniswapV2Factory.sol";
import "./UniswapV2Exchange.sol";
import "./interfaces/IUniswapV2Exchange.sol";
import './interfaces/IUniswapV2Factory.sol';
import './UniswapV2Exchange.sol';
import './interfaces/IUniswapV2Exchange.sol';
contract UniswapV2Factory is IUniswapV2Factory {
address public feeTo;
address public feeToSetter;
mapping (address => mapping(address => address)) private _getExchange;
mapping(address => mapping(address => address)) private _getExchange;
address[] public exchanges;
event ExchangeCreated(address indexed token0, address indexed token1, address exchange, uint);
@ -18,8 +18,8 @@ contract UniswapV2Factory is IUniswapV2Factory {
}
function sortTokens(address tokenA, address tokenB) public pure returns (address token0, address token1) {
require(tokenA != tokenB, "UniswapV2: SAME_ADDRESS");
require(tokenA != address(0) && tokenB != address(0), "UniswapV2: ZERO_ADDRESS");
require(tokenA != tokenB, 'UniswapV2: SAME_ADDRESS');
require(tokenA != address(0) && tokenB != address(0), 'UniswapV2: ZERO_ADDRESS');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
}
@ -34,10 +34,12 @@ contract UniswapV2Factory is IUniswapV2Factory {
function createExchange(address tokenA, address tokenB) external returns (address exchange) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
require(_getExchange[token0][token1] == address(0), "UniswapV2: EXCHANGE_EXISTS");
require(_getExchange[token0][token1] == address(0), 'UniswapV2: EXCHANGE_EXISTS');
bytes memory exchangeBytecode = type(UniswapV2Exchange).creationCode;
bytes32 salt = keccak256(abi.encodePacked(token0, token1));
assembly { exchange := create2(0, add(exchangeBytecode, 32), mload(exchangeBytecode), salt) }
assembly {
exchange := create2(0, add(exchangeBytecode, 32), mload(exchangeBytecode), salt)
}
IUniswapV2Exchange(exchange).initialize(token0, token1);
_getExchange[token0][token1] = exchange;
exchanges.push(exchange);
@ -45,12 +47,12 @@ contract UniswapV2Factory is IUniswapV2Factory {
}
function setFeeTo(address _feeTo) external {
require(msg.sender == feeToSetter, "UniswapV2: FORBIDDEN");
require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');
feeTo = _feeTo;
}
function setFeeToSetter(address _feeToSetter) external {
require(msg.sender == feeToSetter, "UniswapV2: FORBIDDEN");
require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');
feeToSetter = _feeToSetter;
}
}