XP [xApe] Token

xApe.claimStuckTokens(address) (#1205-1214) ignores return value by erc20token.transfer(owner(),balance) (#1213)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

xApe.addLiquidity(uint256,uint256) (#1387-1400) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
xApe.swapAndSendMarketing(uint256) (#1378-1385) sends eth to arbitrary user
Dangerous calls:
- _marketingWallet.transfer(newBalance) (#1384)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in xApe._transfer(address,address,uint256) (#1297-1376):
External calls:
- swapAndLiquify(swapTokens) (#1326)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
- swapAndSendMarketing(marketingTokens) (#1329)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1326)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
- swapAndSendMarketing(marketingTokens) (#1329)
- _marketingWallet.transfer(newBalance) (#1384)
State variables written after the call(s):
- super._transfer(from,address(this),feeAmount) (#1370)
- _balances[sender] = senderBalance - amount (#915)
- _balances[recipient] += amount (#917)
- super._transfer(from,to,amount) (#1373)
- _balances[sender] = senderBalance - amount (#915)
- _balances[recipient] += amount (#917)
- swapAndSendMarketing(marketingTokens) (#1329)
- swapping = true (#1119)
- swapping = false (#1121)
Apply the check-effects-interactions pattern.

Additional information: link

Unable to verify that contract auditor is trusted: Certik, Quantstamp, Hacken, Solidity, Paladinsec, Openzeppelin, Verichains

Contract ownership is not renounced (belongs to a wallet)

Combination 1: Reentrancy vulnerabilities + Functions that send Ether to arbitraty destination. Usual for scams. May be justified by some complex mechanics (e.g. rebase, reflections). DYOR & manual audit are advised.

Combination 2: Unchecked transfer + Functions that send Ether to arbitraty destination. Usual for scams. May be justified by some complex mechanics (e.g. rebase, reflections). DYOR & manual audit are advised.

Combination 3: Reentrancy vulnerabilities + Unchecked transfer vulnerability. Usual for scams. May be justified by some complex mechanics (e.g. rebase, reflections). DYOR & manual audit are advised.

xApe._transfer(address,address,uint256).fees (#1342) is a local variable never initialized
Initialize all the variables. If a variable is meant to be initialized to zero, explicitly set it to zero to improve code readability.

Additional information: link

xApe.addLiquidity(uint256,uint256) (#1387-1400) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
Ensure that all the return values of the function calls are used.

Additional information: link

xApe.setMaxWallet(uint256) (#1281-1283) should emit an event for:
- maxWalletAmount = amount * 10 ** 9 (#1282)
xApe.setMaxBuyAmount(uint256) (#1285-1287) should emit an event for:
- maxBuyAmount = amount * 10 ** 9 (#1286)
xApe.setMaxSellAmount(uint256) (#1289-1291) should emit an event for:
- maxSellAmount = amount * 10 ** 9 (#1290)
xApe.setSwapTokensAtAmount(uint256) (#1293-1295) should emit an event for:
- swapTokensAtAmount = amount * 10 ** 9 (#1294)
xApe.setBuyFee(uint16,uint16) (#1246-1254) should emit an event for:
- totalBuyFee = marketingfee + liquidity (#1253)
xApe.setSellFee(uint16,uint16) (#1256-1264) should emit an event for:
- totalSellFee = marketingfee + liquidity (#1263)
Emit an event for critical parameter changes.

Additional information: link

Reentrancy in xApe.swapAndLiquify(uint256) (#1402-1419):
External calls:
- swapTokensForEth(half) (#1410)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
- addLiquidity(otherHalf,newBalance) (#1416)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1416)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
State variables written after the call(s):
- addLiquidity(otherHalf,newBalance) (#1416)
- _allowances[owner][spender] = amount (#994)
Reentrancy in xApe._transfer(address,address,uint256) (#1297-1376):
External calls:
- swapAndLiquify(swapTokens) (#1326)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
- swapAndSendMarketing(marketingTokens) (#1329)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1326)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
- swapAndSendMarketing(marketingTokens) (#1329)
- _marketingWallet.transfer(newBalance) (#1384)
State variables written after the call(s):
- swapAndSendMarketing(marketingTokens) (#1329)
- _allowances[owner][spender] = amount (#994)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in xApe.swapAndLiquify(uint256) (#1402-1419):
External calls:
- swapTokensForEth(half) (#1410)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
- addLiquidity(otherHalf,newBalance) (#1416)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1416)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#995)
- addLiquidity(otherHalf,newBalance) (#1416)
- SwapAndLiquify(half,newBalance,otherHalf) (#1418)
Reentrancy in xApe._transfer(address,address,uint256) (#1297-1376):
External calls:
- swapAndLiquify(swapTokens) (#1326)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
- swapAndSendMarketing(marketingTokens) (#1329)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1430-1436)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1326)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
- swapAndSendMarketing(marketingTokens) (#1329)
- _marketingWallet.transfer(newBalance) (#1384)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#995)
- swapAndSendMarketing(marketingTokens) (#1329)
- Transfer(sender,recipient,amount) (#919)
- super._transfer(from,address(this),feeAmount) (#1370)
- Transfer(sender,recipient,amount) (#919)
- super._transfer(from,to,amount) (#1373)
Apply the check-effects-interactions pattern.

Additional information: link

Different versions of Solidity are used:
- Version used: ['>=0.5.0', '>=0.6.2', '^0.8.0', '^0.8.11']
- >=0.5.0 (#14)
- >=0.5.0 (#69)
- >=0.6.2 (#89)
- >=0.6.2 (#187)
- ^0.8.0 (#236)
- ^0.8.0 (#466)
- ^0.8.0 (#493)
- ^0.8.0 (#571)
- ^0.8.0 (#656)
- ^0.8.0 (#686)
- ^0.8.11 (#1043)
Use one Solidity version.

Additional information: link

SafeMath.tryDiv(uint256,uint256) (#296-301) is never used and should be removed
SafeMath.add(uint256,uint256) (#325-327) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (#308-313) is never used and should be removed
SafeMath.sub(uint256,uint256,string) (#400-409) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (#254-260) is never used and should be removed
ERC20._burn(address,uint256) (#956-971) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#449-458) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#423-432) is never used and should be removed
Context._msgData() (#483-485) is never used and should be removed
SafeMath.mod(uint256,uint256) (#383-385) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (#279-289) is never used and should be removed
SafeMath.trySub(uint256,uint256) (#267-272) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.8.0 (#656) allows old versions
Pragma version^0.8.0 (#686) allows old versions
Pragma version^0.8.0 (#493) allows old versions
Pragma version^0.8.0 (#466) allows old versions
solc-0.8.11 is not recommended for deployment
Pragma version>=0.6.2 (#89) allows old versions
Pragma version>=0.5.0 (#14) allows old versions
Pragma version^0.8.11 (#1043) necessitates a version too recent to be trusted. Consider deploying with 0.6.12/0.7.6/0.8.7
Pragma version>=0.6.2 (#187) allows old versions
Pragma version^0.8.0 (#236) allows old versions
Pragma version^0.8.0 (#571) allows old versions
Pragma version>=0.5.0 (#69) allows old versions
Deploy with any of the following Solidity versions: 0.5.16 - 0.5.17, 0.6.11 - 0.6.12, 0.7.5 - 0.7.6 Use a simple pragma version that allows any of these versions. Consider using the latest version of Solidity for testing.

Additional information: link

Contract xApe (#1046-1439) is not in CapWords
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#32) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#49) is not in mixedCase
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#31) is not in mixedCase
Variable xApe._marketingWallet (#1084) is not in mixedCase
Function IUniswapV2Router01.WETH() (#93) is not in mixedCase
Parameter xApe.claimStuckTokens(address)._token (#1205) is not in mixedCase
Constant xApe.deadAddress (#1051) is not in UPPER_CASE_WITH_UNDERSCORES
Follow the Solidity naming convention.

Additional information: link

Reentrancy in xApe._transfer(address,address,uint256) (#1297-1376):
External calls:
- swapAndSendMarketing(marketingTokens) (#1329)
- _marketingWallet.transfer(newBalance) (#1384)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1326)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1392-1399)
- swapAndSendMarketing(marketingTokens) (#1329)
- _marketingWallet.transfer(newBalance) (#1384)
State variables written after the call(s):
- super._transfer(from,address(this),feeAmount) (#1370)
- _balances[sender] = senderBalance - amount (#915)
- _balances[recipient] += amount (#917)
- super._transfer(from,to,amount) (#1373)
- _balances[sender] = senderBalance - amount (#915)
- _balances[recipient] += amount (#917)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (#919)
- super._transfer(from,to,amount) (#1373)
- Transfer(sender,recipient,amount) (#919)
- super._transfer(from,address(this),feeAmount) (#1370)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#98) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#99)
Prevent variables from having similar names.

Additional information: link

transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#831-845)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#542-544)
isExcludedFromFees(address) should be declared external:
- xApe.isExcludedFromFees(address) (#1267-1269)
setAutomatedMarketMakerPair(address,bool) should be declared external:
- xApe.setAutomatedMarketMakerPair(address,bool) (#1224-1234)
updateUniswapV2Router(address) should be declared external:
- xApe.updateUniswapV2Router(address) (#1175-1182)
excludeMultipleAccountsFromFees(address[],bool) should be declared external:
- xApe.excludeMultipleAccountsFromFees(address[],bool) (#1194-1203)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#878-886)
symbol() should be declared external:
- ERC20.symbol() (#751-753)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#794-797)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#859-862)
decimals() should be declared external:
- ERC20.decimals() (#768-770)
- xApe.decimals() (#1168-1170)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#550-553)
name() should be declared external:
- ERC20.name() (#743-745)
totalSupply() should be declared external:
- ERC20.totalSupply() (#775-777)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#813-816)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#802-804)
Use the external attribute for functions never called from the contract.

Additional information: link

Attempt to swap token was unsuccessful. For some reason it is untradeable. If token is not in presale stage and is not traded outside PancakeSwap, then it's a scam

Additional information: link

Average 30d PancakeSwap volume is less than $100. Token is either dead or inactive.

Average PancakeSwap trading volume, liqudity, number of swaps are extremely low. Token seems to be dead.

Average 30d PancakeSwap liquidity is less than $100. Token is either dead or inactive.

Average 30d number of PancakeSwap swaps is less than 1. Token is either dead or inactive.

Token has only one trading pair

Token is deployed only at one blockchain

Unable to find website, listings and other project-related information

Token is marked as scam (rug pull, honeypot, phishing, etc.)

Additional information: link

Token has no active CoinMarketCap listing / rank

Token has no active CoinGecko listing / rank

Young tokens have high risks of price dump / death