Merge remote-tracking branch 'upstream/master'

README.md

@@ -2,6 +2,16 @@
 
 Based on https://app.sushiswap.org
 
+## Deployed Contracts / Hash
+
+- SushiToken - https://etherscan.io/token/0x6b3595068778dd592e39a122f4f5a5cf09c90fe2
+- MasterChef - https://etherscan.io/address/0xc2edad668740f1aa35e4d8f227fb8e17dca888cd
+- (Uni|Sushi)swapV2Factory - https://etherscan.io/address/0xc0aee478e3658e2610c5f7a4a2e1777ce9e4f2ac
+- (Uni|Sushi)swapV2Router02 - https://etherscan.io/address/0xd9e1ce17f2641f24ae83637ab66a2cca9c378b9f
+- (Uni|Sushi)swapV2Pair init code hash - `e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303`
+- SushiBar - https://etherscan.io/address/0x8798249c2e607446efb7ad49ec89dd1865ff4272
+- SushiMaker - https://etherscan.io/address/0x54844afe358ca98e4d09aae869f25bfe072e1b1a
+
 ## License
 
 WTFPL

contracts/uniswapv2/UniswapV2Factory.sol

@@ -21,6 +21,10 @@ contract UniswapV2Factory is IUniswapV2Factory {
         return allPairs.length;
     }
 
+    function pairCodeHash() external pure returns (bytes32) {
+        return keccak256(type(UniswapV2Pair).creationCode);
+    }
+
     function createPair(address tokenA, address tokenB) external override returns (address pair) {
         require(tokenA != tokenB, 'UniswapV2: IDENTICAL_ADDRESSES');
         (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);

contracts/uniswapv2/interfaces/IUniswapV2Router01.sol

@@ -0,0 +1,95 @@
+pragma solidity >=0.6.2;
+
+interface IUniswapV2Router01 {
+    function factory() external pure returns (address);
+    function WETH() external pure returns (address);
+
+    function addLiquidity(
+        address tokenA,
+        address tokenB,
+        uint amountADesired,
+        uint amountBDesired,
+        uint amountAMin,
+        uint amountBMin,
+        address to,
+        uint deadline
+    ) external returns (uint amountA, uint amountB, uint liquidity);
+    function addLiquidityETH(
+        address token,
+        uint amountTokenDesired,
+        uint amountTokenMin,
+        uint amountETHMin,
+        address to,
+        uint deadline
+    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
+    function removeLiquidity(
+        address tokenA,
+        address tokenB,
+        uint liquidity,
+        uint amountAMin,
+        uint amountBMin,
+        address to,
+        uint deadline
+    ) external returns (uint amountA, uint amountB);
+    function removeLiquidityETH(
+        address token,
+        uint liquidity,
+        uint amountTokenMin,
+        uint amountETHMin,
+        address to,
+        uint deadline
+    ) external returns (uint amountToken, uint amountETH);
+    function removeLiquidityWithPermit(
+        address tokenA,
+        address tokenB,
+        uint liquidity,
+        uint amountAMin,
+        uint amountBMin,
+        address to,
+        uint deadline,
+        bool approveMax, uint8 v, bytes32 r, bytes32 s
+    ) external returns (uint amountA, uint amountB);
+    function removeLiquidityETHWithPermit(
+        address token,
+        uint liquidity,
+        uint amountTokenMin,
+        uint amountETHMin,
+        address to,
+        uint deadline,
+        bool approveMax, uint8 v, bytes32 r, bytes32 s
+    ) external returns (uint amountToken, uint amountETH);
+    function swapExactTokensForTokens(
+        uint amountIn,
+        uint amountOutMin,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external returns (uint[] memory amounts);
+    function swapTokensForExactTokens(
+        uint amountOut,
+        uint amountInMax,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external returns (uint[] memory amounts);
+    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
+        external
+        payable
+        returns (uint[] memory amounts);
+    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
+        external
+        returns (uint[] memory amounts);
+    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
+        external
+        returns (uint[] memory amounts);
+    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
+        external
+        payable
+        returns (uint[] memory amounts);
+
+    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
+    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
+    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
+    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
+    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
+}

contracts/uniswapv2/interfaces/IUniswapV2Router02.sol

@@ -0,0 +1,44 @@
+pragma solidity >=0.6.2;
+
+import './IUniswapV2Router01.sol';
+
+interface IUniswapV2Router02 is IUniswapV2Router01 {
+    function removeLiquidityETHSupportingFeeOnTransferTokens(
+        address token,
+        uint liquidity,
+        uint amountTokenMin,
+        uint amountETHMin,
+        address to,
+        uint deadline
+    ) external returns (uint amountETH);
+    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
+        address token,
+        uint liquidity,
+        uint amountTokenMin,
+        uint amountETHMin,
+        address to,
+        uint deadline,
+        bool approveMax, uint8 v, bytes32 r, bytes32 s
+    ) external returns (uint amountETH);
+
+    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
+        uint amountIn,
+        uint amountOutMin,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external;
+    function swapExactETHForTokensSupportingFeeOnTransferTokens(
+        uint amountOutMin,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external payable;
+    function swapExactTokensForETHSupportingFeeOnTransferTokens(
+        uint amountIn,
+        uint amountOutMin,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external;
+}

contracts/uniswapv2/interfaces/IWETH.sol

@@ -0,0 +1,7 @@
+pragma solidity >=0.5.0;
+
+interface IWETH {
+    function deposit() external payable;
+    function transfer(address to, uint value) external returns (bool);
+    function withdraw(uint) external;
+}

contracts/uniswapv2/libraries/TransferHelper.sol

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+pragma solidity >=0.6.0;
+
+// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
+library TransferHelper {
+    function safeApprove(address token, address to, uint value) internal {
+        // bytes4(keccak256(bytes('approve(address,uint256)')));
+        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
+        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
+    }
+
+    function safeTransfer(address token, address to, uint value) internal {
+        // bytes4(keccak256(bytes('transfer(address,uint256)')));
+        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
+        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
+    }
+
+    function safeTransferFrom(address token, address from, address to, uint value) internal {
+        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
+        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
+        require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
+    }
+
+    function safeTransferETH(address to, uint value) internal {
+        (bool success,) = to.call{value:value}(new bytes(0));
+        require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
+    }
+}

contracts/uniswapv2/libraries/UniswapV2Library.sol

@@ -0,0 +1,82 @@
+pragma solidity >=0.5.0;
+
+import '../interfaces/IUniswapV2Pair.sol';
+
+import "./SafeMath.sol";
+
+library UniswapV2Library {
+    using SafeMathUniswap for uint;
+
+    // returns sorted token addresses, used to handle return values from pairs sorted in this order
+    function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
+        require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
+        (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
+        require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
+    }
+
+    // calculates the CREATE2 address for a pair without making any external calls
+    function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
+        (address token0, address token1) = sortTokens(tokenA, tokenB);
+        pair = address(uint(keccak256(abi.encodePacked(
+                hex'ff',
+                factory,
+                keccak256(abi.encodePacked(token0, token1)),
+                hex'e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303' // init code hash
+            ))));
+    }
+
+    // fetches and sorts the reserves for a pair
+    function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
+        (address token0,) = sortTokens(tokenA, tokenB);
+        (uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
+        (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
+    }
+
+    // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
+    function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
+        require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
+        require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
+        amountB = amountA.mul(reserveB) / reserveA;
+    }
+
+    // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
+    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
+        require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
+        require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
+        uint amountInWithFee = amountIn.mul(997);
+        uint numerator = amountInWithFee.mul(reserveOut);
+        uint denominator = reserveIn.mul(1000).add(amountInWithFee);
+        amountOut = numerator / denominator;
+    }
+
+    // given an output amount of an asset and pair reserves, returns a required input amount of the other asset
+    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
+        require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
+        require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
+        uint numerator = reserveIn.mul(amountOut).mul(1000);
+        uint denominator = reserveOut.sub(amountOut).mul(997);
+        amountIn = (numerator / denominator).add(1);
+    }
+
+    // performs chained getAmountOut calculations on any number of pairs
+    function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
+        require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
+        amounts = new uint[](path.length);
+        amounts[0] = amountIn;
+        for (uint i; i < path.length - 1; i++) {
+            (uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
+            amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
+        }
+    }
+
+    // performs chained getAmountIn calculations on any number of pairs
+    function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
+        require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
+        amounts = new uint[](path.length);
+        amounts[amounts.length - 1] = amountOut;
+        for (uint i = path.length - 1; i > 0; i--) {
+            (uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
+            amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
+        }
+    }
+}