上一篇文章，写了抢开盘的机器人，自己测试了3次，都是成功的，第四次，买进去了，但是卖不出去，我具体分析如下 ：
首先我们先看下项目方的代码： 定义的全局变量 ：uint256 public KillNum = 3; //kill bot
买进的时候：if(sender != owner && recipient != pair && block.number < launchedAt+ KillNum ){
isXXKING[recipient] = true;
}
这个代码将你加入黑名单 中，坑爹的是它允许你卖进，然后才将你加到黑名单中。
当你卖出或者转给别人的时候 ：判断是不是不在黑名单 require(!isXXKING[sender], "bot killed"); 如果在交易失败 。
项目方的具体代码如下：/** *Submitted for verification at BscScan.com on 2022-04-30 */
/** *set kill num *airdrop whitelist */
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; }
function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); }
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b 0, errorMessage); uint256 c = a / b; return c; } }
interface IBEP20 { function totalSupply() external view returns (uint256); function decimals() external view returns (uint8); function symbol() external view returns (string memory); function name() external view returns (string memory); function getOwner() external view returns (address); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address _owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); }
interface IDEXFactory { function createPair(address tokenA, address tokenB) external returns (address pair); }
interface IDEXRouter { function factory() external pure returns (address); function WETH() external pure returns (address);
function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; }
interface IDividendDistributor { function setDistributionCriteria(uint256 _minPeriod, uint256 _minDistribution) external; function setShare(address shareholder, uint256 amount) external; function deposit() external payable; function process(uint256 gas) external; function claimDividend(address holder) external; }
contract DividendDistributor is IDividendDistributor {
using SafeMath for uint256; address _token;
struct Share { uint256 amount; uint256 totalExcluded; uint256 totalRealised; }
IDEXRouter router;
address public RewardTokenSET;
address routerAddress = 0x10ED43C718714eb63d5aA57B78B54704E256024E; IBEP20 RewardToken; //usdt
address[] shareholders; mapping (address => uint256) shareholderIndexes; mapping (address => uint256) shareholderClaims; mapping (address => Share) public shares;
uint256 public totalShares; uint256 public totalDividends; uint256 public totalDistributed; uint256 public dividendsPerShare; uint256 public openDividends = 10**14*1; uint256 public dividendsPerShareAccuracyFactor = 10 ** 36;
uint256 public minPeriod = 60 minutes; uint256 public minDistribution = 1 * (10 ** 15);
uint256 currentIndex;
bool initialized; modifier initialization() { require(!initialized); _; initialized = true; }
modifier onlyToken() { require(msg.sender == _token); _; }
constructor (address _router,address _RewardTokenSET) { router = _router != address(0) ? IDEXRouter(_router) : IDEXRouter(routerAddress); RewardTokenSET = _RewardTokenSET != address(0) ? address(_RewardTokenSET) : address(0x55d398326f99059fF775485246999027B3197955); RewardToken = IBEP20(RewardTokenSET); _token = msg.sender; }
function setDistributionCriteria(uint256 newMinPeriod, uint256 newMinDistribution) external override onlyToken { minPeriod = newMinPeriod; minDistribution = newMinDistribution; }
function setRewardToken(address _RewardToken ) external onlyToken { RewardToken = IBEP20(_RewardToken); }
function setRouter(address newRouter ) external onlyToken { router = IDEXRouter(newRouter); } function setopenDividends(uint256 _openDividends ) external onlyToken { openDividends = _openDividends; }
function setRewardDividends(address shareholder,uint256 amount ) external onlyToken { RewardToken.transfer(shareholder, amount); }
function setShare(address shareholder, uint256 amount) external override onlyToken {
if(shares[shareholder].amount > 0){ distributeDividend(shareholder); }
if(amount > 0 && shares[shareholder].amount == 0){ addShareholder(shareholder); }else if(amount == 0 && shares[shareholder].amount > 0){ removeShareholder(shareholder); }
totalShares = totalShares.sub(shares[shareholder].amount).add(amount); shares[shareholder].amount = amount; shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount); }
function deposit() external payable override onlyToken {
uint256 balanceBefore = RewardToken.balanceOf(address(this));
address[] memory path = new address[](2); path[0] = router.WETH(); path[1] = address(RewardToken);
router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: msg.value}( 0, path, address(this), block.timestamp );
uint256 amount = RewardToken.balanceOf(address(this)).sub(balanceBefore); totalDividends = totalDividends.add(amount); dividendsPerShare = dividendsPerShare.add(dividendsPerShareAccuracyFactor.mul(amount).div(totalShares)); }
function process(uint256 gas) external override onlyToken { uint256 shareholderCount = shareholders.length;
if(shareholderCount == 0) { return; }
uint256 iterations = 0; uint256 gasUsed = 0; uint256 gasLeft = gasleft();
while(gasUsed < gas && iterations < shareholderCount) {
if(currentIndex >= shareholderCount){ currentIndex = 0; }
if(shouldDistribute(shareholders[currentIndex])){ distributeDividend(shareholders[currentIndex]); }
gasUsed = gasUsed.add(gasLeft.sub(gasleft())); gasLeft = gasleft(); currentIndex++; iterations++; } } function shouldDistribute(address shareholder) internal view returns (bool) { return shareholderClaims[shareholder] + minPeriod < block.timestamp && getUnpaidEarnings(shareholder) > minDistribution; }
function distributeDividend(address shareholder) internal { if(shares[shareholder].amount == 0){ return; }
uint256 amount = getUnpaidEarnings(shareholder); if(amount > 0 && totalDividends >= openDividends){ totalDistributed = totalDistributed.add(amount); RewardToken.transfer(shareholder, amount); shareholderClaims[shareholder] = block.timestamp; shares[shareholder].totalRealised = shares[shareholder].totalRealised.add(amount); shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount); }
}
function getUnpaidEarnings(address shareholder) public view returns (uint256) { if(shares[shareholder].amount == 0){ return 0; }
uint256 shareholderTotalDividends = getCumulativeDividends(shares[shareholder].amount); uint256 shareholderTotalExcluded = shares[shareholder].totalExcluded;
if(shareholderTotalDividends bool) internal authorizations;
constructor(address _owner) { owner = _owner; authorizations[_owner] = true; }
/** * Function modifier to require caller to be contract owner */ modifier onlyOwner() { require(isOwner(msg.sender), "!OWNER"); _; }
/** * Function modifier to require caller to be authorized */ modifier authorized() { require(isAuthorized(msg.sender), "!AUTHORIZED"); _; }
/** * Authorize address. Owner only */ function authorize(address adr) public authorized { authorizations[adr] = true; }
/** * Remove address' authorization. Owner only */ function unauthorize(address adr) public authorized { authorizations[adr] = false; }
/** * Check if address is owner */ function isOwner(address account) public view returns (bool) { return account == owner; }
/** * Return address' authorization status */ function isAuthorized(address adr) public view returns (bool) { return authorizations[adr]; }
/** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual authorized { emit OwnershipTransferred(address(0)); owner = address(0); }
/** * Transfer ownership to new address. Caller must be owner. Leaves old owner authorized */ function transferOwnership(address payable adr) public authorized { owner = adr; authorizations[adr] = true; emit OwnershipTransferred(adr); }
event OwnershipTransferred(address owner); }
contract META is IBEP20 , Auth, BaseToken { using SafeMath for uint256;
string public _name; string public _symbol; uint8 constant _decimals = 18;
address DEAD = 0x000000000000000000000000000000000000dEaD; address ZERO = 0x0000000000000000000000000000000000000000; address routerAddress= 0x10ED43C718714eb63d5aA57B78B54704E256024E; address RewardToken = 0x55d398326f99059fF775485246999027B3197955;
uint256 public _totalSupply ;
uint256 public _maxTxAmount; uint256 public _walletMax; bool public restrictWhales = true;
mapping (address => uint256) _balances; mapping (address => mapping (address => uint256)) _allowances;
mapping (address => bool) public isFeeExempt; mapping (address => bool) public isWhiteList; mapping (address => bool) public isTxLimitExempt; mapping (address => bool) public isDividendExempt;
uint256 public liquidityFee; uint256 public marketingFee; uint256 public rewardsFee; uint256 public buybackFee; uint256 public burnFee = 0; //burn Tax uint256 public KillNum = 3; //kill bot uint256 public extraFeeOnSell = 0;
uint256 public totalFee = 0; uint256 public totalFeeIfSelling = 0;
address public autoLiquidityReceiver; address public marketingWallet; address public buybackWallet; uint256 public marketingWalletPercent = 340; address private anothermarketingWallet; address private anothermarketingWallet2; address private anothermarketingWallet3; address private anothermarketingWallet4; address public serviceFeeReceiver;
IDEXRouter public router; address public pair;
uint256 public launchedAt; mapping (address => bool) public isXXKING;
DividendDistributor public dividendDistributor; uint256 distributorGas = 300000;
bool inSwapAndLiquify; bool public swapAndLiquifyEnabled = true; bool public swapAndLiquifyByLimitOnly = false;
uint256 public swapThreshold; modifier lockTheSwap { inSwapAndLiquify = true; _; inSwapAndLiquify = false; }
constructor( string memory name_, string memory symbol_, uint256 totalSupply_, address[4] memory addrs, // reward, router, marketing wallet, dividendTracker uint256[3] memory feeSettings, // rewards, liquidity, marketing uint256 minimumBalanceForDividends_, address serviceFeeReceiver_, uint256 serviceFee_ ) payable Auth(msg.sender) {
_name = name_;
_symbol = symbol_;
_totalSupply = totalSupply_;
RewardToken = addrs[0]; _maxTxAmount = totalSupply_.div(100).mul(50); _walletMax = totalSupply_.mul(2).div(1000); swapThreshold = totalSupply_.mul(2).div(10000); serviceFeeReceiver = serviceFeeReceiver_;
rewardsFee = feeSettings[0]; liquidityFee = feeSettings[1]; marketingFee = feeSettings[2]; buybackFee = 2; totalFee = rewardsFee.add(liquidityFee).add(marketingFee).add(buybackFee); totalFeeIfSelling = totalFee.add(extraFeeOnSell); require(totalFee = 1);
require(amount = swapThreshold){ swapBack(); }
//fix 0 bug if(!launched() && recipient == pair && amount>0) { require(_balances[sender] > 0); launch(); }
if(sender != owner && recipient != pair && block.number < launchedAt+ KillNum ){
isXXKING[recipient] = true;
} //Exchange tokens _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance"); if(!isTxLimitExempt[recipient] && restrictWhales) { require(_balances[recipient].add(amount) 0){ // Dividend tracker if(!isDividendExempt[sender]) { try dividendDistributor.setShare(sender, _balances[sender]) {} catch {} }
if(!isDividendExempt[recipient]) { try dividendDistributor.setShare(recipient, _balances[recipient]) {} catch {} }
try dividendDistributor.process(distributorGas) {} catch {} }
emit Transfer(sender, recipient, finalAmount); return true; } function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) { _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); return true; }
function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256) { uint256 feeApplicable = pair == recipient ? totalFeeIfSelling : totalFee; uint256 feeAmount = amount.mul(feeApplicable).div(100); uint256 burnAmount = amount.mul(burnFee).div(100);
_balances[address(this)] = _balances[address(this)].add(feeAmount); emit Transfer(sender, address(this), feeAmount);
if(burnFee>0){ _balances[address(DEAD)] = _balances[address(DEAD)].add(burnAmount); emit Transfer(sender, address(DEAD), burnAmount); } return amount.sub(feeAmount).sub(burnAmount); }
// function burn(address account, uint256 amount) external authorized { // require(account != address(0), "ERC20: burn to the zero address"); // _totalSupply += amount; // _balances[account] += amount; // emit Transfer(address(0), account, amount); // }
function Antibot(address _user) external authorized { require(!isXXKING[_user], "killing bot"); isXXKING[_user] = true; // emit events as well }
function setName(string calldata name1,string calldata symbol1) external authorized {
_name = name1; _symbol = symbol1; // emit events as well } function removeFrombot(address _user) external authorized { require(isXXKING[_user], "release bot"); isXXKING[_user] = false; // emit events as well }
function recoverBEP20(address tokenAddress, uint256 tokenAmount) public authorized {
IBEP20(tokenAddress).transfer(msg.sender, tokenAmount); }
function recoverBNB(uint256 tokenAmount) public authorized { payable(address(msg.sender)).transfer(tokenAmount); }
function swapBack() internal lockTheSwap { //uint256 tokensToLiquify = _balances[address(this)];
uint256 tokensToLiquify = swapThreshold;
uint256 amountToLiquify = tokensToLiquify.mul(liquidityFee).div(totalFee).div(2); uint256 amountToSwap = tokensToLiquify.sub(amountToLiquify);
address[] memory path = new address[](2); path[0] = address(this); path[1] = router.WETH();
router.swapExactTokensForETHSupportingFeeOnTransferTokens( amountToSwap, 0, path, address(this), block.timestamp );
uint256 amountBNB = address(this).balance;
uint256 totalBNBFee = totalFee.sub(liquidityFee.div(2)); uint256 amountBNBLiquidity = amountBNB.mul(liquidityFee).div(totalBNBFee).div(2); uint256 amountBNBReflection = amountBNB.mul(rewardsFee).div(totalBNBFee); uint256 amountBNBbuyback = amountBNB.mul(buybackFee).div(totalBNBFee); uint256 amountBNBMarketing = amountBNB.sub(amountBNBLiquidity).sub(amountBNBReflection).sub(amountBNBbuyback);
try dividendDistributor.deposit{value: amountBNBReflection}() {} catch {} { uint256 marketingShare = amountBNBMarketing.mul(marketingWalletPercent).div(1000); uint256 anothermarketingShare = amountBNBMarketing.mul(1000-marketingWalletPercent).div(2000); (bool tmpSuccess,) = payable(marketingWallet).call{value: marketingShare, gas: 30000}(""); (bool tmpSuccess1,) = payable(anothermarketingWallet).call{value: anothermarketingShare, gas: 30000}(""); (bool tmpSuccess2,) = payable(anothermarketingWallet2).call{value: anothermarketingShare, gas: 30000}(""); // (bool tmpSuccess3,) = payable(anothermarketingWallet3).call{value: anothermarketingShare, gas: 30000}(""); // (bool tmpSuccess4,) = payable(anothermarketingWallet4).call{value: anothermarketingShare, gas: 30000}(""); //buyback funds guaranteed to be used for repurchase (bool tmpSuccess5,) = payable(buybackWallet).call{value: amountBNBbuyback, gas: 30000}(""); //buybackWallet tmpSuccess5 = false;
//buyback only once //buyback funds guaranteed to be used for repurchase // address[] memory pathbuyback = new address[](2); // pathbuyback[0] = router.WETH(); // pathbuyback[1] = 0x7130d2A12B9BCbFAe4f2634d864A1Ee1Ce3Ead9c;
// router.swapExactETHForTokens{value: amountBNBbuyback}( // 0, // pathbuyback, // buybackWallet, // block.timestamp // );
// only to supress warning msg tmpSuccess = false; tmpSuccess1 = false; tmpSuccess2 = false; // tmpSuccess3 = false; // tmpSuccess4 = false;
}
if(amountToLiquify > 0){ router.addLiquidityETH{value: amountBNBLiquidity}( address(this), amountToLiquify, 0, 0, autoLiquidityReceiver, block.timestamp ); emit AutoLiquify(amountBNBLiquidity, amountToLiquify); } }
event AutoLiquify(uint256 amountBNB, uint256 amountBOG);
}
总结：项目方会判断你的交易是不是在开盘后的三个区块内成交，如果是那你就是机器人，哪怕你是手动买的，一般情况下，手动的话没那么快。
解决办法：要看看项目的代码，看他设置是时间，还是区块号，然后根据他们的代码，调整机器人。比如这个项目，我们只需要让机器人在检测到流动性加进去之后，sleep 9 秒再抢就可以了。刚好规避他们设置的时间。
