pancake diff

Created Diff never expires
/**
/**
*Submitted for verification at BscScan.com on 2021-04-23
*Submitted for verification at BscScan.com on 2020-09-19
*/
*/


// File: @uniswap\lib\contracts\libraries\TransferHelper.sol
pragma solidity =0.6.6;


interface IPancakeFactory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);


pragma solidity >=0.6.0;
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;
}


// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
library TransferHelper {
function safeApprove(address token, address to, uint value) internal {
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
}


function safeTransfer(address token, address to, uint value) internal {
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
}


function safeTransferFrom(address token, address from, address to, uint value) internal {
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
(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');
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
}


function safeTransferETH(address to, uint value) internal {
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
}
}


// File: contracts\interfaces\IPancakeRouter01.sol

pragma solidity >=0.6.2;

interface IPancakeRouter01 {
interface IPancakeRouter01 {
function factory() external pure returns (address);
function factory() external pure returns (address);
function WETH() external pure returns (address);
function WETH() external pure returns (address);


function addLiquidity(
function addLiquidity(
address tokenA,
address tokenA,
address tokenB,
address tokenB,
uint amountADesired,
uint amountADesired,
uint amountBDesired,
uint amountBDesired,
uint amountAMin,
uint amountAMin,
uint amountBMin,
uint amountBMin,
address to,
address to,
uint deadline
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
function addLiquidityETH(
address token,
address token,
uint amountTokenDesired,
uint amountTokenDesired,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
function removeLiquidity(
address tokenA,
address tokenA,
address tokenB,
address tokenB,
uint liquidity,
uint liquidity,
uint amountAMin,
uint amountAMin,
uint amountBMin,
uint amountBMin,
address to,
address to,
uint deadline
uint deadline
) external returns (uint amountA, uint amountB);
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
function removeLiquidityETH(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline
uint deadline
) external returns (uint amountToken, uint amountETH);
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
function removeLiquidityWithPermit(
address tokenA,
address tokenA,
address tokenB,
address tokenB,
uint liquidity,
uint liquidity,
uint amountAMin,
uint amountAMin,
uint amountBMin,
uint amountBMin,
address to,
address to,
uint deadline,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
function removeLiquidityETHWithPermit(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
function swapExactTokensForTokens(
uint amountIn,
uint amountIn,
uint amountOutMin,
uint amountOutMin,
address[] calldata path,
address[] calldata path,
address to,
address to,
uint deadline
uint deadline
) external returns (uint[] memory amounts);
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
function swapTokensForExactTokens(
uint amountOut,
uint amountOut,
uint amountInMax,
uint amountInMax,
address[] calldata path,
address[] calldata path,
address to,
address to,
uint deadline
uint deadline
) external returns (uint[] memory amounts);
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
external
payable
payable
returns (uint[] memory amounts);
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
external
returns (uint[] memory amounts);
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
external
returns (uint[] memory amounts);
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
external
payable
payable
returns (uint[] memory amounts);
returns (uint[] memory amounts);


function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
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 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 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 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);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
}


// File: contracts\interfaces\IPancakeRouter02.sol

pragma solidity >=0.6.2;

interface IPancakeRouter02 is IPancakeRouter01 {
interface IPancakeRouter02 is IPancakeRouter01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline
uint deadline
) external returns (uint amountETH);
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
) external returns (uint amountETH);


function swapExactTokensForTokensSupportingFeeOnTransferTokens(
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountIn,
uint amountOutMin,
uint amountOutMin,
address[] calldata path,
address[] calldata path,
address to,
address to,
uint deadline
uint deadline
) external;
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
uint amountOutMin,
address[] calldata path,
address[] calldata path,
address to,
address to,
uint deadline
uint deadline
) external payable;
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountIn,
uint amountOutMin,
uint amountOutMin,
address[] calldata path,
address[] calldata path,
address to,
address to,
uint deadline
uint deadline
) external;
) external;
}
}


// File: contracts\interfaces\IPancakeFactory.sol

pragma solidity >=0.5.0;

interface IPancakeFactory {
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);
}

// File: contracts\libraries\SafeMath.sol

pragma solidity =0.6.6;

// 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\IPancakePair.sol

pragma solidity >=0.5.0;

interface IPancakePair {
interface IPancakePair {
event Approval(address indexed owner, address indexed spender, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
event Transfer(address indexed from, address indexed to, uint value);


function name() external pure returns (string memory);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);


function approve(address spender, uint value) external returns (bool);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, 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 transferFrom(address from, address to, uint value) external returns (bool);


function DOMAIN_SEPARATOR() external view returns (bytes32);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
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;
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 Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
event Swap(
address indexed sender,
address indexed sender,
uint amount0In,
uint amount0In,
uint amount1In,
uint amount1In,
uint amount0Out,
uint amount0Out,
uint amount1Out,
uint amount1Out,
address indexed to
address indexed to
);
);
event Sync(uint112 reserve0, uint112 reserve1);
event Sync(uint112 reserve0, uint112 reserve1);


function MINIMUM_LIQUIDITY() external pure returns (uint);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function factory() external view returns (address);
function token0() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function kLast() external view returns (uint);


function mint(address to) external returns (uint liquidity);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function skim(address to) external;
function sync() external;
function sync() external;


function initialize(address, address) external;
function initialize(address, address) external;
}
}


// File: contracts\libraries\PancakeLibrary.sol
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)

library SafeMath {
pragma solidity >=0.5.0;
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');
}
}


library PancakeLibrary {
library PancakeLibrary {
using SafeMath for uint;
using SafeMath for uint;


// returns sorted token addresses, used to handle return values from pairs sorted in this order
// 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) {
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'PancakeLibrary: IDENTICAL_ADDRESSES');
require(tokenA != tokenB, 'PancakeLibrary: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'PancakeLibrary: ZERO_ADDRESS');
require(token0 != address(0), 'PancakeLibrary: ZERO_ADDRESS');
}
}


// calculates the CREATE2 address for a pair without making any external calls
// 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) {
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
hex'ff',
factory,
factory,
keccak256(abi.encodePacked(token0, token1)),
keccak256(abi.encodePacked(token0, token1)),
hex'00fb7f630766e6a796048ea87d01acd3068e8ff67d078148a3fa3f4a84f69bd5' // init code hash
hex'd0d4c4cd0848c93cb4fd1f498d7013ee6bfb25783ea21593d5834f5d250ece66' // init code hash
))));
))));
}
}


// fetches and sorts the reserves for a pair
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(address token0,) = sortTokens(tokenA, tokenB);
pairFor(factory, tokenA, tokenB);
pairFor(factory, tokenA, tokenB);
(uint reserve0, uint reserve1,) = IPancakePair(pairFor(factory, tokenA, tokenB)).getReserves();
(uint reserve0, uint reserve1,) = IPancakePair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
(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
// 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) {
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'PancakeLibrary: INSUFFICIENT_AMOUNT');
require(amountA > 0, 'PancakeLibrary: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'PancakeLibrary: INSUFFICIENT_LIQUIDITY');
require(reserveA > 0 && reserveB > 0, 'PancakeLibrary: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
amountB = amountA.mul(reserveB) / reserveA;
}
}


// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
// 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) {
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'PancakeLibrary: INSUFFICIENT_INPUT_AMOUNT');
require(amountIn > 0, 'PancakeLibrary: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'PancakeLibrary: INSUFFICIENT_LIQUIDITY');
require(reserveIn > 0 && reserveOut > 0, 'PancakeLibrary: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(9975);
uint amountInWithFee = amountIn.mul(998);
uint numerator = amountInWithFee.mul(reserveOut);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(10000).add(amountInWithFee);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
amountOut = numerator / denominator;
}
}


// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
// 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) {
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'PancakeLibrary: INSUFFICIENT_OUTPUT_AMOUNT');
require(amountOut > 0, 'PancakeLibrary: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'PancakeLibrary: INSUFFICIENT_LIQUIDITY');
require(reserveIn > 0 && reserveOut > 0, 'PancakeLibrary: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn.mul(amountOut).mul(10000);
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(9975);
uint denominator = reserveOut.sub(amountOut).mul(998);
amountIn = (numerator / denominator).add(1);
amountIn = (numerator / denominator).add(1);
}
}


// performs chained getAmountOut calculations on any number of pairs
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'PancakeLibrary: INVALID_PATH');
require(path.length >= 2, 'PancakeLibrary: INVALID_PATH');
amounts = new uint[](path.length);
amounts = new uint[](path.length);
amounts[0] = amountIn;
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
}
}


// performs chained getAmountIn calculations on any number of pairs
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'PancakeLibrary: INVALID_PATH');
require(path.length >= 2, 'PancakeLibrary: INVALID_PATH');
amounts = new uint[](path.length);
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
}
}
}


// File: contracts\interfaces\IERC20.sol

pragma solidity >=0.5.0;

interface IERC20 {
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
event Transfer(address indexed from, address indexed to, uint value);


function name() external view returns (string memory);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);


function approve(address spender, uint value) external returns (bool);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, 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 transferFrom(address from, address to, uint value) external returns (bool);
}
}

// File: contracts\interfaces\IWETH.sol

pragma solidity >=0.5.0;


interface IWETH {
interface IWETH {
function deposit() external payable;
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
function withdraw(uint) external;
}
}


// File: contracts\PancakeRouter.sol

pragma solidity =0.6.6;







contract PancakeRouter is IPancakeRouter02 {
contract PancakeRouter is IPancakeRouter02 {
using SafeMath for uint;
using SafeMath for uint;


address public immutable override factory;
address public immutable override factory;
address public immutable override WETH;
address public immutable override WETH;


modifier ensure(uint deadline) {
modifier ensure(uint deadline) {
require(deadline >= block.timestamp, 'PancakeRouter: EXPIRED');
require(deadline >= block.timestamp, 'PancakeRouter: EXPIRED');
_;
_;
}
}


constructor(address _factory, address _WETH) public {
constructor(address _factory, address _WETH) public {
factory = _factory;
factory = _factory;
WETH = _WETH;
WETH = _WETH;
}
}


receive() external payable {
receive() external payable {
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
}
}


// **** ADD LIQUIDITY ****
// **** ADD LIQUIDITY ****
function _addLiquidity(
function _addLiquidity(
address tokenA,
address tokenA,
address tokenB,
address tokenB,
uint amountADesired,
uint amountADesired,
uint amountBDesired,
uint amountBDesired,
uint amountAMin,
uint amountAMin,
uint amountBMin
uint amountBMin
) internal virtual returns (uint amountA, uint amountB) {
) internal virtual returns (uint amountA, uint amountB) {
// create the pair if it doesn't exist yet
// create the pair if it doesn't exist yet
if (IPancakeFactory(factory).getPair(tokenA, tokenB) == address(0)) {
if (IPancakeFactory(factory).getPair(tokenA, tokenB) == address(0)) {
IPancakeFactory(factory).createPair(tokenA, tokenB);
IPancakeFactory(factory).createPair(tokenA, tokenB);
}
}
(uint reserveA, uint reserveB) = PancakeLibrary.getReserves(factory, tokenA, tokenB);
(uint reserveA, uint reserveB) = PancakeLibrary.getReserves(factory, tokenA, tokenB);
if (reserveA == 0 && reserveB == 0) {
if (reserveA == 0 && reserveB == 0) {
(amountA, amountB) = (amountADesired, amountBDesired);
(amountA, amountB) = (amountADesired, amountBDesired);
} else {
} else {
uint amountBOptimal = PancakeLibrary.quote(amountADesired, reserveA, reserveB);
uint amountBOptimal = PancakeLibrary.quote(amountADesired, reserveA, reserveB);
if (amountBOptimal <= amountBDesired) {
if (amountBOptimal <= amountBDesired) {
require(amountBOptimal >= amountBMin, 'PancakeRouter: INSUFFICIENT_B_AMOUNT');
require(amountBOptimal >= amountBMin, 'PancakeRouter: INSUFFICIENT_B_AMOUNT');
(amountA, amountB) = (amountADesired, amountBOptimal);
(amountA, amountB) = (amountADesired, amountBOptimal);
} else {
} else {
uint amountAOptimal = PancakeLibrary.quote(amountBDesired, reserveB, reserveA);
uint amountAOptimal = PancakeLibrary.quote(amountBDesired, reserveB, reserveA);
assert(amountAOptimal <= amountADesired);
assert(amountAOptimal <= amountADesired);
require(amountAOptimal >= amountAMin, 'PancakeRouter: INSUFFICIENT_A_AMOUNT');
require(amountAOptimal >= amountAMin, 'PancakeRouter: INSUFFICIENT_A_AMOUNT');
(amountA, amountB) = (amountAOptimal, amountBDesired);
(amountA, amountB) = (amountAOptimal, amountBDesired);
}
}
}
}
}
}
function addLiquidity(
function addLiquidity(
address tokenA,
address tokenA,
address tokenB,
address tokenB,
uint amountADesired,
uint amountADesired,
uint amountBDesired,
uint amountBDesired,
uint amountAMin,
uint amountAMin,
uint amountBMin,
uint amountBMin,
address to,
address to,
uint deadline
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
address pair = PancakeLibrary.pairFor(factory, tokenA, tokenB);
address pair = PancakeLibrary.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = IPancakePair(pair).mint(to);
liquidity = IPancakePair(pair).mint(to);
}
}
function addLiquidityETH(
function addLiquidityETH(
address token,
address token,
uint amountTokenDesired,
uint amountTokenDesired,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
(amountToken, amountETH) = _addLiquidity(
token,
token,
WETH,
WETH,
amountTokenDesired,
amountTokenDesired,
msg.value,
msg.value,
amountTokenMin,
amountTokenMin,
amountETHMin
amountETHMin
);
);
address pair = PancakeLibrary.pairFor(factory, token, WETH);
address pair = PancakeLibrary.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IPancakePair(pair).mint(to);
liquidity = IPancakePair(pair).mint(to);
// refund dust eth, if any
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
}
}


// **** REMOVE LIQUIDITY ****
// **** REMOVE LIQUIDITY ****
function removeLiquidity(
function removeLiquidity(
address tokenA,
address tokenA,
address tokenB,
address tokenB,
uint liquidity,
uint liquidity,
uint amountAMin,
uint amountAMin,
uint amountBMin,
uint amountBMin,
address to,
address to,
uint deadline
uint deadline
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
address pair = PancakeLibrary.pairFor(factory, tokenA, tokenB);
address pair = PancakeLibrary.pairFor(factory, tokenA, tokenB);
IPancakePair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
IPancakePair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
(uint amount0, uint amount1) = IPancakePair(pair).burn(to);
(uint amount0, uint amount1) = IPancakePair(pair).burn(to);
(address token0,) = PancakeLibrary.sortTokens(tokenA, tokenB);
(address token0,) = PancakeLibrary.sortTokens(tokenA, tokenB);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= amountAMin, 'PancakeRouter: INSUFFICIENT_A_AMOUNT');
require(amountA >= amountAMin, 'PancakeRouter: INSUFFICIENT_A_AMOUNT');
require(amountB >= amountBMin, 'PancakeRouter: INSUFFICIENT_B_AMOUNT');
require(amountB >= amountBMin, 'PancakeRouter: INSUFFICIENT_B_AMOUNT');
}
}
function removeLiquidityETH(
function removeLiquidityETH(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline
uint deadline
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
(amountToken, amountETH) = removeLiquidity(
(amountToken, amountETH) = removeLiquidity(
token,
token,
WETH,
WETH,
liquidity,
liquidity,
amountTokenMin,
amountTokenMin,
amountETHMin,
amountETHMin,
address(this),
address(this),
deadline
deadline
);
);
TransferHelper.safeTransfer(token, to, amountToken);
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
}
function removeLiquidityWithPermit(
function removeLiquidityWithPermit(
address tokenA,
address tokenA,
address tokenB,
address tokenB,
uint liquidity,
uint liquidity,
uint amountAMin,
uint amountAMin,
uint amountBMin,
uint amountBMin,
address to,
address to,
uint deadline,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountA, uint amountB) {
) external virtual override returns (uint amountA, uint amountB) {
address pair = PancakeLibrary.pairFor(factory, tokenA, tokenB);
address pair = PancakeLibrary.pairFor(factory, tokenA, tokenB);
uint value = approveMax ? uint(-1) : liquidity;
uint value = approveMax ? uint(-1) : liquidity;
IPancakePair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
IPancakePair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
}
}
function removeLiquidityETHWithPermit(
function removeLiquidityETHWithPermit(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountToken, uint amountETH) {
) external virtual override returns (uint amountToken, uint amountETH) {
address pair = PancakeLibrary.pairFor(factory, token, WETH);
address pair = PancakeLibrary.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
uint value = approveMax ? uint(-1) : liquidity;
IPancakePair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
IPancakePair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
}
}


// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
function removeLiquidityETHSupportingFeeOnTransferTokens(
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline
uint deadline
) public virtual override ensure(deadline) returns (uint amountETH) {
) public virtual override ensure(deadline) returns (uint amountETH) {
(, amountETH) = removeLiquidity(
(, amountETH) = removeLiquidity(
token,
token,
WETH,
WETH,
liquidity,
liquidity,
amountTokenMin,
amountTokenMin,
amountETHMin,
amountETHMin,
address(this),
address(this),
deadline
deadline
);
);
TransferHelper.safeTransfer(token, to, IERC20(token).balanceOf(address(this)));
TransferHelper.safeTransfer(token, to, IERC20(token).balanceOf(address(this)));
IWETH(WETH).withdraw(amountETH);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
}
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
address token,
uint liquidity,
uint liquidity,
uint amountTokenMin,
uint amountTokenMin,
uint amountETHMin,
uint amountETHMin,
address to,
address to,
uint deadline,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountETH) {
) external virtual override returns (uint amountETH) {
address pair = PancakeLibrary.pairFor(factory, token, WETH);
address pair = PancakeLibrary.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
uint value = approveMax ? uint(-1) : liquidity;
IPancakePair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
IPancakePair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
token, liquidity, amountTokenMin, amountETHMin, to, deadline
token, liquidity, amountTokenMin, amountETHMin, to, deadline
);
);
}
}


// **** SWAP ****
// **** SWAP ****
// requires the initial amount to have already been sent to the first pair
// 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 {
function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = PancakeLibrary.sortTokens(input, output);
(address token0,) = PancakeLibrary.sortTokens(input, output);
uint amountOut = amounts[i + 1];
uint amountOut = amounts[i + 1];
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
address to = i < path.length - 2 ? PancakeLibrary.pairFor(factory, output, path[i + 2]) : _to;
address to = i < path.length - 2 ? PancakeLibrary.pairFor(factory, output, path[i + 2]) : _to;
IPancakePair(PancakeLibrary.pairFor(factory, input, output)).swap(
IPancakePair(PancakeLibrary.pairFor(factory, input, output)).swap(
amount0Out, amount1Out, to, new bytes(0)
amount0Out, amount1Out, to, new bytes(0)
);
);
}
}
}
}
function swapExactTokensForTokens(
function swapExactTokensForTokens(
uint amountIn,
uint amountIn,
uint amountOutMin,
uint amountOutMin,
address[] calldata path,
address[] calldata path,
address to,
address to,
uint deadline
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = PancakeLibrary.getAmountsOut(factory,
amounts = PancakeLibrary.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'PancakeRouter: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, PancakeLibrary.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, 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 = PancakeLibrary.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'PancakeRouter: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, Pa