Contract 0x18a3d7b6CA2c7b699218BAf67639aA834E5d5aC3

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0x5ad07f3d69b41bf085d439c5b9c84e6dc5aced27078f520c5e4f0133a84ab9ddApprove133345862021-10-18 14:05:316 days 11 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0xb63f1130e50cd14944a9f12b84fe436b3efd45392bd9da13573652c002acab81Approve133345582021-10-18 14:04:076 days 11 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x5773e395ba0372ecfea1f1c77069c1d50af89af1fb2871994378aaf014e5c4eaApprove133345262021-10-18 14:02:316 days 11 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00044354
0x500c62c6b887c6461553a5a2296f1059ade81fdde78fd67c19026e7985a0857fApprove133338852021-10-18 13:30:286 days 12 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x107926edfd8e1c713eb4cf71c5f7e408c659144bdee91fe78dba69e008029f85Approve133338182021-10-18 13:27:076 days 12 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x2fb1764b8318aa30eee88ca3eac0662b8bb22eacc7b633e7b4c3ffed78b26676Approve133337902021-10-18 13:25:436 days 12 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x5c86af720c249caaa52f8d68a5254b026b44935786619134959a397f09b8b1b1Approve133337662021-10-18 13:24:316 days 12 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x902e377f82ab4bfedadae8a0da169e0c4bb0552585207be59c89e4230881054bApprove133337612021-10-18 13:24:166 days 12 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x279f40d5da869a6f2e7188cbae7675fd9f53cec32f4ff4ccca3c87553da35bf1Approve133337372021-10-18 13:23:046 days 12 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00044354
0x219d5c7f0f56e26a28ff177902ca425442960aedaf943d6aab6c592c6d16d7d6Approve133336982021-10-18 13:21:076 days 12 hrs ago0x1252a457cccb5aa1bf7d86063fcdc2d8363e12e5 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00044354
0xefccfee8ba644ea1cb1219cec69bce0aeb22b976aee222da79360767635a48a0Approve133332632021-10-18 12:59:226 days 12 hrs ago0x978b1ad40b46d4824dee15d0bf5bb1be5c99bc94 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00044354
0x64007ad181515ce1772e9138e262febe4d6f748664eb3c7fb14824b1ef83f0bdApprove133332522021-10-18 12:58:496 days 12 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00044354
0x05e20cfd1e766eead18f38bdf562a7b7438b7b1e80f96f28781f8ee119e0acc5Approve133326312021-10-18 12:27:466 days 13 hrs ago0x3bedf54d9fc3484ec25a2ebc52c35744fbe7e04f IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00044354
0xdcf5e44ca290a9162b61e9eeaa5034b17a1a73cae7ba12190c2795ff2a717fb3Approve133325772021-10-18 12:25:046 days 13 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x50e202da88de3b343e44742c4bc37778cfe15f884ad3631b1afab5cdcef03b67Approve133325532021-10-18 12:23:526 days 13 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0xe04528e4e5504c0bb3c12cc2139e6e5ba699c3216ab8076c91d599cf1cdbf572Approve133325392021-10-18 12:23:106 days 13 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x9f21177a781136c39630c8e0c983dc03c0e3d374a41e08fe2787516aaec92003Approve133325392021-10-18 12:23:106 days 13 hrs ago0x978b1ad40b46d4824dee15d0bf5bb1be5c99bc94 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x133201282cd7d92d974363be5f716672f87f4103c9e2427496015ba8f3f2ce59Approve133321752021-10-18 12:04:586 days 13 hrs ago0x978b1ad40b46d4824dee15d0bf5bb1be5c99bc94 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x6d45eb8e05ab7a0f028564e60100eccaf514a50c17a504be1aace88e2e2cfaceApprove133320982021-10-18 12:01:076 days 13 hrs ago0x978b1ad40b46d4824dee15d0bf5bb1be5c99bc94 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x861bce0ad19c875521471cc56a34380f3db354490684eaf76f24211b4a60fa35Approve133320932021-10-18 12:00:526 days 13 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x8ca5cdba12a0f60f499061cdddf63736dbbbb3a8f04cecfdc4c644ed59f37b42Approve133320852021-10-18 12:00:286 days 13 hrs ago0x978b1ad40b46d4824dee15d0bf5bb1be5c99bc94 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x8ad328227f68ebf4f2fe562848ec85828270de37dc1fb3c87135137c97e183aeApprove133320802021-10-18 12:00:136 days 13 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0xeb002a77ecf90376969c633099addefee8b1f5863520d06eeb11c50e863bdc39Approve133320722021-10-18 11:59:496 days 13 hrs ago0x978b1ad40b46d4824dee15d0bf5bb1be5c99bc94 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0xa74a3e85591c705d28c6e1adcb935bbde1fb17df4880ef32fdbe7362b1a7ab1eApprove133320672021-10-18 11:59:346 days 13 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
0x86f48c7541ffa8244d8f1c27514a97ba18a168e9c06e6df2372a116fe6627617Approve133320502021-10-18 11:58:436 days 13 hrs ago0xdd094342c13f9e4340e2c07c63d9fd98e7ba1c63 IN  0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB0.00025154
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0x7ea54a0b54d59431a9576eba74f23b0f9fd7141f179ff9dad830049cfe06b4ac133336512021-10-18 13:18:466 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0x7ea54a0b54d59431a9576eba74f23b0f9fd7141f179ff9dad830049cfe06b4ac133336512021-10-18 13:18:466 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0x3d6dd3f78b0bc1ec8018c3128a62a047f790b3fddf1f01f7f52fa2ae648dda91133333492021-10-18 13:03:406 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0x3d6dd3f78b0bc1ec8018c3128a62a047f790b3fddf1f01f7f52fa2ae648dda91133333492021-10-18 13:03:406 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0x765a6fe537ec61265fcc3292d3bf534b83da5423a4b4a6ba9a0081e629ba9b25133333342021-10-18 13:02:556 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
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0x2ed76d19dd428744efc0bcb6a511881372886e0ec59ba995be45faed964578e4133332732021-10-18 12:59:526 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
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0x2ed76d19dd428744efc0bcb6a511881372886e0ec59ba995be45faed964578e4133332732021-10-18 12:59:526 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0xa71d044eaf94eae3f0fc2e1f1911738849d5a79f5331026d5a367b88c9010202133332652021-10-18 12:59:286 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0xa71d044eaf94eae3f0fc2e1f1911738849d5a79f5331026d5a367b88c9010202133332652021-10-18 12:59:286 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0xa71d044eaf94eae3f0fc2e1f1911738849d5a79f5331026d5a367b88c9010202133332652021-10-18 12:59:286 days 12 hrs ago 0xaf1ca46b23e845f90701544320ccdd5086288ec5 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
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0x895e16c5d93ff15b62392612fa681ed3edd1e6d11e7dff8dd43b01a3b9672deb133086902021-10-17 16:24:507 days 9 hrs ago 0xe0af4ff093fecea0e3bd3aefbddfd26202b07433 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
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0xe55bedd434ebae4881e9f9e65047b3568d90e90233c01be2eaf42bffef7bc1d0133086542021-10-17 16:23:027 days 9 hrs ago 0xe0af4ff093fecea0e3bd3aefbddfd26202b07433 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0xe55bedd434ebae4881e9f9e65047b3568d90e90233c01be2eaf42bffef7bc1d0133086542021-10-17 16:23:027 days 9 hrs ago 0xe0af4ff093fecea0e3bd3aefbddfd26202b07433 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0x74588dbe9bf124a4a9a2a64d5623adf656160e02064184b452e18ba0148ebd7a133086352021-10-17 16:22:057 days 9 hrs ago 0xe0af4ff093fecea0e3bd3aefbddfd26202b07433 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0x74588dbe9bf124a4a9a2a64d5623adf656160e02064184b452e18ba0148ebd7a133086352021-10-17 16:22:057 days 9 hrs ago 0xe0af4ff093fecea0e3bd3aefbddfd26202b07433 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
0x74588dbe9bf124a4a9a2a64d5623adf656160e02064184b452e18ba0148ebd7a133086352021-10-17 16:22:057 days 9 hrs ago 0xe0af4ff093fecea0e3bd3aefbddfd26202b07433 0x18a3d7b6ca2c7b699218baf67639aa834e5d5ac30 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
CoinSwapPair

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 10 : CoinSwapPair.sol
pragma solidity =0.5.16;

import './interfaces/ICoinSwapPair.sol';
import './CoinSwapBEP20.sol';
import './libraries/Math.sol';
import './libraries/UQ112x112.sol';
import './interfaces/IBEP20.sol';
import './interfaces/ICoinSwapFactory.sol';
import './interfaces/ICoinSwapCallee.sol';

contract CoinSwapPair is ICoinSwapPair, CoinSwapBEP20 {
    using SafeMath  for uint;
    using UQ112x112 for uint224;

    uint public constant MINIMUM_LIQUIDITY = 10**3;
    bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));

    address public factory;
    address public token0;
    address public token1;

    uint112 private reserve0;           // uses single storage slot, accessible via getReserves
    uint112 private reserve1;           // uses single storage slot, accessible via getReserves
    uint32  private blockTimestampLast; // uses single storage slot, accessible via getReserves

    uint public price0CumulativeLast;
    uint public price1CumulativeLast;
    uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event

    uint private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, 'CoinSwap: LOCKED');
        unlocked = 0;
        _;
        unlocked = 1;
    }

    function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {
        _reserve0 = reserve0;
        _reserve1 = reserve1;
        _blockTimestampLast = blockTimestampLast;
    }

    function _safeTransfer(address token, address to, uint value) private {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'CoinSwap: TRANSFER_FAILED');
    }

    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);

    constructor() public {
        factory = msg.sender;
    }

    // called once by the factory at time of deployment
    function initialize(address _token0, address _token1) external {
        require(msg.sender == factory, 'CoinSwap: FORBIDDEN'); // sufficient check
        token0 = _token0;
        token1 = _token1;
    }

    // update reserves and, on the first call per block, price accumulators
    function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {
        require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'CoinSwap: OVERFLOW');
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
            price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

    // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
        address feeTo = ICoinSwapFactory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
                uint rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint denominator = rootK.mul(3).add(rootKLast);
                    uint liquidity = numerator / denominator;
                    if (liquidity > 0) _mint(feeTo, liquidity);
                }
            }
        } else if (_kLast != 0) {
            kLast = 0;
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint liquidity) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        uint balance0 = IBEP20(token0).balanceOf(address(this));
        uint balance1 = IBEP20(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
           _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
        } else {
            liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
        }
        require(liquidity > 0, 'CoinSwap: INSUFFICIENT_LIQUIDITY_MINTED');
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function burn(address to) external lock returns (uint amount0, uint amount1) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        address _token0 = token0;                                // gas savings
        address _token1 = token1;                                // gas savings
        uint balance0 = IBEP20(_token0).balanceOf(address(this));
        uint balance1 = IBEP20(_token1).balanceOf(address(this));
        uint liquidity = balanceOf[address(this)];

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        require(amount0 > 0 && amount1 > 0, 'CoinSwap: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IBEP20(_token0).balanceOf(address(this));
        balance1 = IBEP20(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {
        require(amount0Out > 0 || amount1Out > 0, 'CoinSwap: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'CoinSwap: INSUFFICIENT_LIQUIDITY');

        uint balance0;
        uint balance1;
        { // scope for _token{0,1}, avoids stack too deep errors
        address _token0 = token0;
        address _token1 = token1;
        require(to != _token0 && to != _token1, 'CoinSwap: INVALID_TO');
        if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
        if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
        if (data.length > 0) ICoinSwapCallee(to).coinswapCall(msg.sender, amount0Out, amount1Out, data);
        balance0 = IBEP20(_token0).balanceOf(address(this));
        balance1 = IBEP20(_token1).balanceOf(address(this));
        }
        uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
        uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
        require(amount0In > 0 || amount1In > 0, 'CoinSwap: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(2));
        uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(2));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'CoinSwap: K');
        }

        _update(balance0, balance1, _reserve0, _reserve1);
        emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
    }

    // force balances to match reserves
    function skim(address to) external lock {
        address _token0 = token0; // gas savings
        address _token1 = token1; // gas savings
        _safeTransfer(_token0, to, IBEP20(_token0).balanceOf(address(this)).sub(reserve0));
        _safeTransfer(_token1, to, IBEP20(_token1).balanceOf(address(this)).sub(reserve1));
    }

    // force reserves to match balances
    function sync() external lock {
        _update(IBEP20(token0).balanceOf(address(this)), IBEP20(token1).balanceOf(address(this)), reserve0, reserve1);
    }
}

File 2 of 10 : ICoinSwapPair.sol
pragma solidity >=0.5.0;

interface ICoinSwapPair {
    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 3 of 10 : CoinSwapBEP20.sol
pragma solidity =0.5.16;

import './interfaces/ICoinSwapBEP20.sol';
import './libraries/SafeMath.sol';

contract CoinSwapBEP20 is ICoinSwapBEP20 {
    using SafeMath for uint;

    string public constant name = 'CoinSwap LPs';
    string public constant symbol = 'CS-LP';
    uint8 public constant decimals = 18;
    uint  public totalSupply;
    mapping(address => uint) public balanceOf;
    mapping(address => mapping(address => uint)) public allowance;

    bytes32 public DOMAIN_SEPARATOR;
    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    mapping(address => uint) public nonces;

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

    constructor() public {
        uint chainId;
        assembly {
            chainId := chainid
        }
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
                keccak256(bytes(name)),
                keccak256(bytes('1')),
                chainId,
                address(this)
            )
        );
    }

    function _mint(address to, uint value) internal {
        totalSupply = totalSupply.add(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint value) internal {
        balanceOf[from] = balanceOf[from].sub(value);
        totalSupply = totalSupply.sub(value);
        emit Transfer(from, address(0), value);
    }

    function _approve(address owner, address spender, uint value) private {
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _transfer(address from, address to, uint value) private {
        balanceOf[from] = balanceOf[from].sub(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(from, to, value);
    }

    function approve(address spender, uint value) external returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transfer(address to, uint value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(address from, address to, uint value) external returns (bool) {
        if (allowance[from][msg.sender] != uint(-1)) {
            allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
        }
        _transfer(from, to, value);
        return true;
    }

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
        require(deadline >= block.timestamp, 'CoinSwap: EXPIRED');
        bytes32 digest = keccak256(
            abi.encodePacked(
                '\x19\x01',
                DOMAIN_SEPARATOR,
                keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress != address(0) && recoveredAddress == owner, 'CoinSwap: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}

File 4 of 10 : Math.sol
pragma solidity =0.5.16;

// a library for performing various math operations

library Math {
    function min(uint x, uint y) internal pure returns (uint z) {
        z = x < y ? x : y;
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint y) internal pure returns (uint z) {
        if (y > 3) {
            z = y;
            uint x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

File 5 of 10 : UQ112x112.sol
pragma solidity =0.5.16;

// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))

// range: [0, 2**112 - 1]
// resolution: 1 / 2**112

library UQ112x112 {
    uint224 constant Q112 = 2**112;

    // encode a uint112 as a UQ112x112
    function encode(uint112 y) internal pure returns (uint224 z) {
        z = uint224(y) * Q112; // never overflows
    }

    // divide a UQ112x112 by a uint112, returning a UQ112x112
    function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
        z = x / uint224(y);
    }
}

File 6 of 10 : IBEP20.sol
pragma solidity >=0.5.0;

interface IBEP20 {
    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 7 of 10 : ICoinSwapFactory.sol
pragma solidity >=0.5.0;

interface ICoinSwapFactory {
    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;
}

File 8 of 10 : ICoinSwapCallee.sol
pragma solidity >=0.5.0;

interface ICoinSwapCallee {
    function coinswapCall(address sender, uint amount0, uint amount1, bytes calldata data) external;
}

File 9 of 10 : ICoinSwapBEP20.sol
pragma solidity >=0.5.0;

interface ICoinSwapBEP20 {
    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;
}

File 10 of 10 : SafeMath.sol
pragma solidity =0.5.16;

// 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');
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

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Block Transaction Gas Used Reward
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