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Create wkFactory.sol #252

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Create wkFactory.sol #252

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30 changes: 30 additions & 0 deletions contracts/wkFactory.sol
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Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./wkSwap.sol";
@@ -8,20 +9,19 @@ contract Factory {
mapping(address => mapping(address => address)) public getPair;
address[] public allPairs;

constructor() public {}

function allPairsLength() external view returns (uint) {
return allPairs.length;
}

function createPair(address tokenA, address tokenB) external returns (address pair) {
function createPair(address tokenA, address tokenB) external returns(address) {
require(tokenA != tokenB, "IDENTICAL_ADDRESSES");
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), "ZERO_ADDRESS");
require(getPair[token0][token1] == address(0), "PAIR_EXISTS");
Swap swap = new Swap(tokenA, tokenB);
getPair[token0][token1] = swap;
getPair[token1][token0] = swap;
allPairs.push(swap);
getPair[token0][token1] = address(swap);
getPair[token1][token0] = address(swap);
allPairs.push(address(swap));
return address(swap);
}
}