Address Contract Verified
Address
0x2B1Fa7eD2009b68aE48B6406A80030E2cB037588
Balance
0 ETH
Nonce
1
Code Size
24193 bytes
Creator
0x06dcA709...cA4c at tx 0x44b932c1...47340f
Indexed Transactions
0
Contract Bytecode
24193 bytes
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Verified Source Code Full Match
Compiler: v0.6.6+commit.6c089d02
EVM: istanbul
Optimization: Yes (200 runs)
EthRouter.sol 1004 lines
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');
}
}
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);
}
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;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
function INIT_CODE_PAIR_HASH() external view returns (bytes32);
}
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
// File: contracts\interfaces\IUniswapV2Pair.sol
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);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// File: contracts\libraries\UniswapV2Library.sol
pragma solidity >=0.5.0;
library UniswapV2Library {
using SafeMath 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'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // 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);
pairFor(factory, 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 getAmountsOutPre(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 getAmountsInPre(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);
}
}
// 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]);
if (i == 0) {
amounts[i + 1] = getAmountOut(amounts[i].mul(994) / 1000, reserveIn, reserveOut);
} else {
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);
}
// add
amounts[0] = (amounts[0].mul(1000) / 994).add(1);
}
}
// File: contracts\interfaces\IERC20.sol
pragma solidity >=0.5.0;
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view 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);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
// File: contracts\interfaces\IWETH.sol
pragma solidity >=0.5.0;
interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
// File: contracts\UniswapV2Router.sol
pragma solidity =0.6.6;
contract EthRouter is IUniswapV2Router02 {
using SafeMath for uint;
address public immutable override factory;
address public immutable override WETH;
address public owner;
address public feeReceiver = 0x012A4Eb8F6723da99Cfd14EB395200d4F4b92884;
address public feeReceiverA = 0x012A4Eb8F6723da99Cfd14EB395200d4F4b92884;
mapping (address => bool) private feeTokenList;
modifier ensure(uint deadline) {
require(deadline >= block.timestamp, 'UniswapV2Router: EXPIRED');
_;
}
modifier onlyOwner() {
require(owner == msg.sender, "Ownable: caller is not the owner");
_;
}
constructor(address _factory, address _WETH) public {
factory = _factory;
WETH = _WETH;
owner = msg.sender;
}
receive() external payable {
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
}
function setTokenList(address token, bool value) external {
require(msg.sender == owner, "valid caller");
feeTokenList[token] = value;
}
function setMultiTokenList(address[] calldata tokens, bool value) external {
require(msg.sender == owner, "valid caller");
for (uint i; i < tokens.length; i++) {
feeTokenList[tokens[i]] = value;
}
}
function setFeeReceiver(address _feeReceiver) external {
require(msg.sender == owner, "valid caller");
require(_feeReceiver != address(0), "valid feeReceiver");
feeReceiver = _feeReceiver;
}
function setFeeReceiverA(address _feeReceiverA) external {
require(msg.sender == owner, "valid caller");
require(_feeReceiverA != address(0), "valid feeReceiver");
feeReceiverA = _feeReceiverA;
}
function setOwner(address _owner) external {
require(msg.sender == owner, "valid caller");
require(_owner != address(0), "valid owner");
owner = _owner;
}
function getFeeToken(uint amount) private pure returns (uint) {
return amount.mul(6) / 1000;
}
// **** ADD LIQUIDITY ****
function _addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin
) internal virtual returns (uint amountA, uint amountB) {
// create the pair if it doesn't exist yet
if (IUniswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) {
IUniswapV2Factory(factory).createPair(tokenA, tokenB);
}
(uint reserveA, uint reserveB) = UniswapV2Library.getReserves(factory, tokenA, tokenB);
if (reserveA == 0 && reserveB == 0) {
(amountA, amountB) = (amountADesired, amountBDesired);
} else {
uint amountBOptimal = UniswapV2Library.quote(amountADesired, reserveA, reserveB);
if (amountBOptimal <= amountBDesired) {
require(amountBOptimal >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
(amountA, amountB) = (amountADesired, amountBOptimal);
} else {
uint amountAOptimal = UniswapV2Library.quote(amountBDesired, reserveB, reserveA);
assert(amountAOptimal <= amountADesired);
require(amountAOptimal >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
(amountA, amountB) = (amountAOptimal, amountBDesired);
}
}
}
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = IUniswapV2Pair(pair).mint(to);
}
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = UniswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IUniswapV2Pair(pair).mint(to);
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
}
// **** REMOVE LIQUIDITY ****
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
(uint amount0, uint amount1) = IUniswapV2Pair(pair).burn(to);
(address token0,) = UniswapV2Library.sortTokens(tokenA, tokenB);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
require(amountB >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
}
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
(amountToken, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, 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 virtual override returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
}
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountToken, uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
}
// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountETH) {
(, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, IERC20(token).balanceOf(address(this)));
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
token, liquidity, amountTokenMin, amountETHMin, to, deadline
);
}
// **** SWAP ****
// requires the initial amount to have already been sent to the first pair
function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
uint amountOut = amounts[i + 1];
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output)).swap(
amount0Out, amount1Out, to, new bytes(0)
);
}
}
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'PancakeRouter: INSUFFICIENT_OUTPUT_AMOUNT');
if (feeTokenList[path[0]]) {
uint feeToken = getFeeToken(amountIn);
TransferHelper.safeTransferFrom(path[0], msg.sender, feeReceiver, feeToken);
amounts[0] -= feeToken;
} else if (!feeTokenList[path[0]] && !feeTokenList[path[path.length - 1]]) {
uint feeToken = getFeeToken(amountIn);
TransferHelper.safeTransferFrom(path[0], msg.sender, feeReceiverA, feeToken);
amounts[0] -= feeToken;
}
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
if (feeTokenList[path[0]]) {
_swap(amounts, path, to);
} else if (feeTokenList[path[path.length - 1]]) {
// add
uint[] memory amountsPre = UniswapV2Library.getAmountsOutPre(factory, amounts[0], path);
_swap(amountsPre, path, address(this));
TransferHelper.safeTransfer(path[path.length - 1], to, amounts[amounts.length - 1]);
uint left = IERC20(path[path.length - 1]).balanceOf(address(this));
if (left > 0)
TransferHelper.safeTransfer(path[path.length - 1], feeReceiver, left);
} else {
uint[] memory amountsPre = UniswapV2Library.getAmountsOutPre(factory, amounts[0], path);
_swap(amountsPre, path, to);
}
}
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
if (feeTokenList[path[0]]) {
uint feeToken = getFeeToken(amounts[0]);
TransferHelper.safeTransferFrom(path[0], msg.sender, feeReceiver, feeToken);
amounts[0] -= feeToken;
} else if (!feeTokenList[path[0]] && !feeTokenList[path[path.length - 1]]) {
uint feeToken = getFeeToken(amounts[0]);
TransferHelper.safeTransferFrom(path[0], msg.sender, feeReceiverA, feeToken);
amounts[0] -= feeToken;
}
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
if (feeTokenList[path[0]]) {
_swap(amounts, path, to);
} else if (feeTokenList[path[path.length - 1]]) {
// add
uint[] memory amountsPre = UniswapV2Library.getAmountsOutPre(factory, amounts[0], path);
_swap(amountsPre, path, address(this));
TransferHelper.safeTransfer(path[path.length - 1], to, amountOut);
uint left = IERC20(path[path.length - 1]).balanceOf(address(this));
if (left > 0)
TransferHelper.safeTransfer(path[path.length - 1], feeReceiver, left);
} else {
uint[] memory amountsPre = UniswapV2Library.getAmountsOutPre(factory, amounts[0], path);
_swap(amountsPre, path, to);
}
}
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, msg.value, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
uint feeToken = getFeeToken(msg.value);
TransferHelper.safeTransferETH(feeReceiver, feeToken);
amounts[0] -= feeToken;
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
}
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
// add
amounts = UniswapV2Library.getAmountsOutPre(factory, amounts[0], path);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amountOut);
uint left = address(this).balance;
if (left > 0)
TransferHelper.safeTransferETH(feeReceiver, left);
}
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
uint[] memory amountsPre = UniswapV2Library.getAmountsOutPre(factory, amounts[0], path);
_swap(amountsPre, path, address(this));
IWETH(WETH).withdraw(amountsPre[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
uint left = address(this).balance;
if (left > 0)
TransferHelper.safeTransferETH(feeReceiver, left);
}
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
virtual
override
payable
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= msg.value, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
uint amounts0Pre = amounts[0];
uint feeToken = getFeeToken(amounts[0]);
TransferHelper.safeTransferETH(feeReceiver, feeToken);
amounts[0] -= feeToken;
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
// refund dust eth, if any
if (msg.value > amounts0Pre) TransferHelper.safeTransferETH(msg.sender, msg.value - amounts0Pre);
}
// **** SWAP (supporting fee-on-transfer tokens) ****
// requires the initial amount to have already been sent to the first pair
function _swapSupportingFeeOnTransferTokens(address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
IUniswapV2Pair pair = IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output));
uint amountInput;
uint amountOutput;
{ // scope to avoid stack too deep errors
(uint reserve0, uint reserve1,) = pair.getReserves();
(uint reserveInput, uint reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
amountInput = IERC20(input).balanceOf(address(pair)).sub(reserveInput);
amountOutput = UniswapV2Library.getAmountOut(amountInput, reserveInput, reserveOutput);
}
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOutput) : (amountOutput, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
pair.swap(amount0Out, amount1Out, to, new bytes(0));
}
}
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) {
if (feeTokenList[path[0]]) {
uint feeToken = getFeeToken(amountIn);
TransferHelper.safeTransferFrom(path[0], msg.sender, feeReceiver, feeToken);
amountIn -= feeToken;
} else if (!feeTokenList[path[0]] && !feeTokenList[path[path.length - 1]]) {
uint feeToken = getFeeToken(amountIn);
TransferHelper.safeTransferFrom(path[0], msg.sender, feeReceiverA, feeToken);
amountIn -= feeToken;
}
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
if (feeTokenList[path[0]]) {
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
} else if (feeTokenList[path[path.length - 1]]) {
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(address(this));
_swapSupportingFeeOnTransferTokens(path, address(this));
uint balanceAfter = IERC20(path[path.length - 1]).balanceOf(address(this));
require(
balanceAfter.sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
uint feeToken = getFeeToken(balanceAfter - balanceBefore);
TransferHelper.safeTransfer(path[path.length - 1], feeReceiver, feeToken);
uint left = balanceAfter - balanceBefore - feeToken;
TransferHelper.safeTransfer(path[path.length - 1], to, left);
} else {
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
}
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
payable
ensure(deadline)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
uint amountIn = msg.value;
uint feeToken = getFeeToken(amountIn);
TransferHelper.safeTransferETH(feeReceiver, feeToken);
amountIn -= feeToken;
IWETH(WETH).deposit{value: amountIn}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn));
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
ensure(deadline)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
_swapSupportingFeeOnTransferTokens(path, address(this));
uint amountOut = IERC20(WETH).balanceOf(address(this));
require(amountOut >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).withdraw(amountOut);
uint feeToken = getFeeToken(amountOut);
TransferHelper.safeTransferETH(feeReceiver, feeToken);
amountOut -= feeToken;
TransferHelper.safeTransferETH(to, amountOut);
}
// **** LIBRARY FUNCTIONS ****
function quote(uint amountA, uint reserveA, uint reserveB) public pure virtual override returns (uint amountB) {
return UniswapV2Library.quote(amountA, reserveA, reserveB);
}
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountOut)
{
return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut);
}
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountIn)
{
return UniswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut);
}
function getAmountsOut(uint amountIn, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsOut(factory, amountIn, path);
}
function getAmountsIn(uint amountOut, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsIn(factory, amountOut, path);
}
function rescueETH(address to) external onlyOwner {
payable(to).transfer(address(this).balance);
}
function rescueERC20(address token, address to, uint amount) external onlyOwner {
IERC20(token).transfer(to, amount);
}
}
Read Contract
WETH 0xad5c4648 → address
factory 0xc45a0155 → address
feeReceiver 0xb3f00674 → address
feeReceiverA 0xbc045739 → address
getAmountIn 0x85f8c259 → uint256
getAmountOut 0x054d50d4 → uint256
getAmountsIn 0x1f00ca74 → uint256[]
getAmountsOut 0xd06ca61f → uint256[]
owner 0x8da5cb5b → address
quote 0xad615dec → uint256
Write Contract 24 functions
These functions modify contract state and require a wallet transaction to execute.
addLiquidity 0xe8e33700
address tokenA
address tokenB
uint256 amountADesired
uint256 amountBDesired
uint256 amountAMin
uint256 amountBMin
address to
uint256 deadline
returns: uint256, uint256, uint256
addLiquidityETH 0xf305d719
address token
uint256 amountTokenDesired
uint256 amountTokenMin
uint256 amountETHMin
address to
uint256 deadline
returns: uint256, uint256, uint256
removeLiquidity 0xbaa2abde
address tokenA
address tokenB
uint256 liquidity
uint256 amountAMin
uint256 amountBMin
address to
uint256 deadline
returns: uint256, uint256
removeLiquidityETH 0x02751cec
address token
uint256 liquidity
uint256 amountTokenMin
uint256 amountETHMin
address to
uint256 deadline
returns: uint256, uint256
removeLiquidityETHSupportingFeeOnTransferTokens 0xaf2979eb
address token
uint256 liquidity
uint256 amountTokenMin
uint256 amountETHMin
address to
uint256 deadline
returns: uint256
removeLiquidityETHWithPermit 0xded9382a
address token
uint256 liquidity
uint256 amountTokenMin
uint256 amountETHMin
address to
uint256 deadline
bool approveMax
uint8 v
bytes32 r
bytes32 s
returns: uint256, uint256
removeLiquidityETHWithPermitSupportingFeeOnTransferTokens 0x5b0d5984
address token
uint256 liquidity
uint256 amountTokenMin
uint256 amountETHMin
address to
uint256 deadline
bool approveMax
uint8 v
bytes32 r
bytes32 s
returns: uint256
removeLiquidityWithPermit 0x2195995c
address tokenA
address tokenB
uint256 liquidity
uint256 amountAMin
uint256 amountBMin
address to
uint256 deadline
bool approveMax
uint8 v
bytes32 r
bytes32 s
returns: uint256, uint256
rescueERC20 0xb2118a8d
address token
address to
uint256 amount
rescueETH 0x04824e70
address to
setFeeReceiver 0xefdcd974
address _feeReceiver
setFeeReceiverA 0xebababe3
address _feeReceiverA
setMultiTokenList 0x0adadcaa
address[] tokens
bool value
setOwner 0x13af4035
address _owner
setTokenList 0xcb03ffaa
address token
bool value
swapETHForExactTokens 0xfb3bdb41
uint256 amountOut
address[] path
address to
uint256 deadline
returns: uint256[]
swapExactETHForTokens 0x7ff36ab5
uint256 amountOutMin
address[] path
address to
uint256 deadline
returns: uint256[]
swapExactETHForTokensSupportingFeeOnTransferTokens 0xb6f9de95
uint256 amountOutMin
address[] path
address to
uint256 deadline
swapExactTokensForETH 0x18cbafe5
uint256 amountIn
uint256 amountOutMin
address[] path
address to
uint256 deadline
returns: uint256[]
swapExactTokensForETHSupportingFeeOnTransferTokens 0x791ac947
uint256 amountIn
uint256 amountOutMin
address[] path
address to
uint256 deadline
swapExactTokensForTokens 0x38ed1739
uint256 amountIn
uint256 amountOutMin
address[] path
address to
uint256 deadline
returns: uint256[]
swapExactTokensForTokensSupportingFeeOnTransferTokens 0x5c11d795
uint256 amountIn
uint256 amountOutMin
address[] path
address to
uint256 deadline
swapTokensForExactETH 0x4a25d94a
uint256 amountOut
uint256 amountInMax
address[] path
address to
uint256 deadline
returns: uint256[]
swapTokensForExactTokens 0x8803dbee
uint256 amountOut
uint256 amountInMax
address[] path
address to
uint256 deadline
returns: uint256[]
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