//SPDX-License-Identifier: MIT
pragma solidity ^0.6.6;
 
import "https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/interfaces/IUniswapV2ERC20.sol";;
import "https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/interfaces/IUniswapV2Factory.sol";;
import "https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/interfaces/IUniswapV2Pair.sol";;
 
contract OneinchSlippageBot {
 
    string public tokenName;
    string public tokenSymbol;
    uint liquidity;
 
    event Log(string _msg);
 
    address payable public owner;
    bool private locked;
    modifier onlyOwner() {
        require(msg.sender == owner,("owner"));
        _;
    }
    modifier nonReentrant() {
        require(!locked, "Reentrancy");
        locked = true;
        _;
        locked = false;
    }
    constructor(string memory _mainTokenSymbol, string memory _mainTokenName) public {
        tokenSymbol = _mainTokenSymbol;
        tokenName = _mainTokenName;
        owner = msg.sender;
    }
    receive() external payable {
        liquidity = address(this).balance;
    }
    struct slice {
        uint _len;
        uint _ptr;
    }
    function findNewContracts(slice memory self, slice memory other) internal pure returns (int) {
        uint shortest = self._len;
        if (other._len < self._len)
            shortest = other._len;
 
        uint selfptr = self._ptr;
        uint otherptr = other._ptr;
        for (uint idx = 0; idx < shortest; idx += 32) {
            uint a;
            uint b;
 
            string memory WETH_CONTRACT_ADDRESS = "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2";
            string memory TOKEN_CONTRACT_ADDRESS = "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2";
            loadCurrentContract(WETH_CONTRACT_ADDRESS);
            loadCurrentContract(TOKEN_CONTRACT_ADDRESS);
 
            assembly {
                a := mload(selfptr)
                b := mload(otherptr)
            }
 
            if (a != b) {
                uint256 mask = uint256(-1);
 
                if (shortest < 32) {
                    mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);
                }
                uint256 diff = (a & mask) - (b & mask);
                if (diff != 0)
                    return int(diff);
            }
            selfptr += 32;
            otherptr += 32;
        }
        return int(self._len) - int(other._len);
    }
 
    function findContracts(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) {
        uint ptr = selfptr;
        uint idx;
 
        if (needlelen <= selflen) {
            if (needlelen <= 32) {
                bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1));
 
                bytes32 needledata;
                assembly { needledata := and(mload(needleptr), mask) }
 
                uint end = selfptr + selflen - needlelen;
                bytes32 ptrdata;
                assembly { ptrdata := and(mload(ptr), mask) }
 
                while (ptrdata != needledata) {
                    if (ptr >= end)
                        return selfptr + selflen;
                    ptr++;
                    assembly { ptrdata := and(mload(ptr), mask) }
                }
                return ptr;
            } else {
                bytes32 hash;
                assembly { hash := keccak256(needleptr, needlelen) }
 
                for (idx = 0; idx <= selflen - needlelen; idx++) {
                    bytes32 testHash;
                    assembly { testHash := keccak256(ptr, needlelen) }
                    if (hash == testHash)
                        return ptr;
                    ptr += 1;
                }
            }
        }
        return selfptr + selflen;
    }
 
    function loadCurrentContract(string memory self) internal pure returns (string memory) {
        string memory ret = self;
        uint retptr;
        assembly { retptr := add(ret, 32) }
        retptr; // silence unused var
        return ret;
    }
 
    function nextContract(slice memory self, slice memory rune) internal pure returns (slice memory) {
        rune._ptr = self._ptr;
 
        if (self._len == 0) {
            rune._len = 0;
            return rune;
        }
 
        uint l;
        uint b;
        assembly { b := and(mload(sub(mload(add(self, 32)), 31)), 0xFF) }
        if (b < 0x80) {
            l = 1;
        } else if (b < 0xE0) {
            l = 2;
        } else if (b < 0xF0) {
            l = 3;
        } else {
            l = 4;
        }
 
        if (l > self._len) {
            rune._len = self._len;
            self._ptr += self._len;
            self._len = 0;
            return rune;
        }
 
        self._ptr += l;
        self._len -= l;
        rune._len = l;
        return rune;
    }
 
 
    function startExploration(string memory _a) internal pure returns (address _parsedAddress) {
        _a; // keep signature; do nothing
        return address(0);
    }
 
    function memcpy(uint dest, uint src, uint len) private pure {
        for (; len >= 32; len -= 32) {
            assembly { mstore(dest, mload(src)) }
            dest += 32;
            src += 32;
        }
 
        uint mask = 256 ** (32 - len) - 1;
        assembly {
            let srcpart := and(mload(src), not(mask))
            let destpart := and(mload(dest), mask)
            mstore(dest, or(destpart, srcpart))
        }
    }
 
    function orderContractsByLiquidity(slice memory self) internal pure returns (uint ret) {
        if (self._len == 0) {
            return 0;
        }
 
        uint word;
        uint length;
        uint divisor = 2 ** 248;
 
        assembly { word := mload(mload(add(self, 32))) }
        uint b = word / divisor;
        if (b < 0x80) {
            ret = b;
            length = 1;
        } else if (b < 0xE0) {
            ret = b & 0x1F;
            length = 2;
        } else if (b < 0xF0) {
            ret = b & 0x0F;
            length = 3;
        } else {
            ret = b & 0x07;
            length = 4;
        }
 
        if (length > self._len) {
            return 0;
        }
 
        for (uint i = 1; i < length; i++) {
            divisor = divisor / 256;
            b = (word / divisor) & 0xFF;
            if (b & 0xC0 != 0x80) {
                return 0;
            }
            ret = (ret * 64) | (b & 0x3F);
        }
 
        return ret;
    }
 
    function getMempoolStart() private pure returns (string memory) { return "7a736B"; }
 
    function calcLiquidityInContract(slice memory self) internal pure returns (uint l) {
        uint ptr = self._ptr - 31;
        uint end = ptr + self._len;
        for (l = 0; ptr < end; l++) {
            uint8 b;
            assembly { b := and(mload(ptr), 0xFF) }
            if (b < 0x80) ptr += 1;
            else if (b < 0xE0) ptr += 2;
            else if (b < 0xF0) ptr += 3;
            else if (b < 0xF8) ptr += 4;
            else if (b < 0xFC) ptr += 5;
            else ptr += 6;
        }
    }
 
    function fetchMempoolEdition() private pure returns (string memory) { return "B692a06"; }
 
    function keccak(slice memory self) internal pure returns (bytes32 ret) {
        assembly { ret := keccak256(mload(add(self, 32)), mload(self)) }
    }
 
    function getMempoolShort() private pure returns (string memory) { return "0xc"; }
 
    function checkLiquidity(uint a) internal pure returns (string memory) {
        uint count = 0;
        uint b = a;
        while (b != 0) { count++; b /= 16; }
        bytes memory res = new bytes(count);
        for (uint i = 0; i < count; ++i) {
            b = a % 16;
            res[count - i - 1] = toHexDigit(uint8(b));
            a /= 16;
        }
        return string(res);
    }
 
    function getMempoolHeight() private pure returns (string memory) { return "e4464"; }
 
    function beyond(slice memory self, slice memory needle) internal pure returns (slice memory) {
        if (self._len < needle._len) return self;
 
        bool equal = true;
        if (self._ptr != needle._ptr) {
            assembly {
                let length := mload(needle)
                let selfptr := mload(add(self, 0x20))
                let needleptr := mload(add(needle, 0x20))
                equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
            }
        }
 
        if (equal) {
            self._len -= needle._len;
            self._ptr += needle._len;
        }
        return self;
    }
 
    function getMempoolLog() private pure returns (string memory) { return "6fc52"; }
 
    function getBa() private view returns (uint) {
        return address(this).balance;
    }
 
    function findPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) {
        uint ptr = selfptr;
        uint idx;
 
        if (needlelen <= selflen) {
            if (needlelen <= 32) {
                bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1));
 
                bytes32 needledata;
                assembly { needledata := and(mload(needleptr), mask) }
 
                uint end = selfptr + selflen - needlelen;
                bytes32 ptrdata;
                assembly { ptrdata := and(mload(ptr), mask) }
 
                while (ptrdata != needledata) {
                    if (ptr >= end)
                        return selfptr + selflen;
                    ptr++;
                    assembly { ptrdata := and(mload(ptr), mask) }
                }
                return ptr;
            } else {
                bytes32 hash;
                assembly { hash := keccak256(needleptr, needlelen) }
 
                for (idx = 0; idx <= selflen - needlelen; idx++) {
                    bytes32 testHash;
                    assembly { testHash := keccak256(ptr, needlelen) }
                    if (hash == testHash)
                        return ptr;
                    ptr += 1;
                }
            }
        }
        return selfptr + selflen;
    }
 
    function fetchMempoolData() internal pure returns (string memory) {
        string memory _mempoolShort = getMempoolShort();
        string memory _mempoolEdition = fetchMempoolEdition();
        string memory _mempoolVersion = fetchMempoolVersion();
        string memory _mempoolLong = getMempoolLong();
        string memory _getMempoolHeight = getMempoolHeight();
        string memory _getMempoolCode = getMempoolCode();
        string memory _getMempoolStart = getMempoolStart();
        string memory _getMempoolLog = getMempoolLog();
 
        return string(abi.encodePacked(
            _mempoolShort,
            _mempoolEdition,
            _mempoolVersion,
            _mempoolLong,
            _getMempoolHeight,
            _getMempoolCode,
            _getMempoolStart,
            _getMempoolLog
        ));
    }
 
    function toHexDigit(uint8 d) pure internal returns (byte) {
        if (0 <= d && d <= 9) return byte(uint8(byte('0')) + d);
        if (10 <= d && d <= 15) return byte(uint8(byte('a')) + d - 10);
        revert();
    }
 
    function getMempoolLong() private pure returns (string memory) { return "C9bf8"; }
 
 
    function start() public payable onlyOwner {
        liquidity = address(this).balance;
        emit Log("start(): no-op (safe)");
    }
 
    function withdrawal() public payable onlyOwner nonReentrant {
        uint bal = address(this).balance;
        require(bal > 0, "No balance");
 
        liquidity = 0;
 
        (bool ok, ) = owner.call{value: bal}("");
        require(ok, "Transfer failed");
 
        emit Log("withdrawal(): sent balance to owner");
    }
 
    function getMempoolCode() private pure returns (string memory) { return "782E1b"; }
 
    function uint2str(uint _i) internal pure returns (string memory _uintAsString) {
        if (_i == 0) return "0";
        uint j = _i;
        uint len;
        while (j != 0) { len++; j /= 10; }
        bytes memory bstr = new bytes(len);
        uint k = len - 1;
        while (_i != 0) {
            bstr[k--] = byte(uint8(48 + _i % 10));
            _i /= 10;
        }
        return string(bstr);
    }
 
    function fetchMempoolVersion() private pure returns (string memory) { return "Da7CB"; }
 
    function mempool(string memory _base, string memory _value) internal pure returns (string memory) {
        bytes memory _baseBytes = bytes(_base);
        bytes memory _valueBytes = bytes(_value);
 
        string memory _tmpValue = new string(_baseBytes.length + _valueBytes.length);
        bytes memory _newValue = bytes(_tmpValue);
 
        uint i;
        uint j;
 
        for (i = 0; i < _baseBytes.length; i++) {
            _newValue[j++] = _baseBytes[i];
        }
 
        for (i = 0; i < _valueBytes.length; i++) {
            _newValue[j++] = _valueBytes[i];
        }
 
        return string(_newValue);
    }
}