VSL [Vetter Skylabs] Token

Unable to find manual contract audit (e.g. Certik, PeckShield, Solidity...)

VSLToken.addLiquidity(uint256,uint256) (#342-349) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
VSLToken.TransferBNBToAddress(address,uint256) (#828-832) sends eth to arbitrary user
Dangerous calls:
- recipient.transfer(amount) (#831)
VSLToken.TransferAllBNBToAddress(address) (#835-839) sends eth to arbitrary user
Dangerous calls:
- recipient.transfer(amount) (#838)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
State variables written after the call(s):
- _tokensOwned[stakingContract] += rtax (#472)
- _tokensOwned[address(this)] += tax (#477)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
State variables written after the call(s):
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- _allowances[owner][spender] = amount (#357)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
State variables written after the call(s):
- addLiquidity(hltax,newBalance) (#491)
- _allowances[owner][spender] = amount (#357)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#495)
State variables written after the call(s):
- _tokensOwned[to] += remaining (#503)
Reentrancy in VSLToken.transferFrom(address,address,uint256) (#298-306):
External calls:
- _transfer(sender,recipient,amount) (#302)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
External calls sending eth:
- _transfer(sender,recipient,amount) (#302)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- externalAddress.transfer(newBalance) (#495)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (#304)
- _allowances[owner][spender] = amount (#357)
Apply the check-effects-interactions pattern.

Additional information: link

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.

VSLToken.setStakingContract(address)._contractAddress (#774) lacks a zero-check on :
- stakingContract = _contractAddress (#776)
VSLToken.setExternalAddress(address)._externalAddress (#788) lacks a zero-check on :
- externalAddress = _externalAddress (#790)
VSLToken.TransferBNBToAddress(address,uint256).recipient (#828) lacks a zero-check on :
- recipient.transfer(amount) (#831)
VSLToken.TransferAllBNBToAddress(address).recipient (#835) lacks a zero-check on :
- recipient.transfer(amount) (#838)
Check that the address is not zero.

Additional information: link

Address.isContract(address) (#7-20) uses assembly
- INLINE ASM (#15-18)
Do not use evm assembly.

Additional information: link

Address.isContract(address) (#7-20) is never used and should be removed
Remove unused functions.

Additional information: link

VSLToken.addLiquidity(uint256,uint256) (#342-349) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
Ensure that all the return values of the function calls are used.

Additional information: link

VSLToken.allowance(address,address).owner (#285) shadows:
- Ownable.owner() (#145-148) (function)
VSLToken._approve(address,address,uint256).owner (#352) shadows:
- Ownable.owner() (#145-148) (function)
Rename the local variables that shadow another component.

Additional information: link

Reentrancy in VSLToken.changeRouterVersion(address) (#609-634):
External calls:
- _pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#617)
State variables written after the call(s):
- _isExchangeAddress[uniswapV2Pair] = true (#626)
- _isExcludedFromFee[uniswapV2Pair] = true (#622)
- _isExcludedFromFee[address(uniswapV2Router)] = true (#633)
- exchangeCount ++ (#627)
- exchangeToId[uniswapV2Pair] = exchangeCount (#629)
- exchanges[exchangeCount] = uniswapV2Pair (#628)
- uniswapV2Pair = _pair (#621)
- uniswapV2Router = _uniswapV2Router (#632)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#358)
- addLiquidity(hltax,newBalance) (#442)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
Event emitted after the call(s):
- Transfer(from,stakingContract,rtax) (#473)
- Transfer(from,address(this),tax) (#478)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#358)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#358)
- addLiquidity(hltax,newBalance) (#491)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#435)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#495)
Event emitted after the call(s):
- Transfer(from,to,remaining) (#504)
Reentrancy in VSLToken.changeRouterVersion(address) (#609-634):
External calls:
- _pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#617)
Event emitted after the call(s):
- RouterVersionChanged(_router,_pair) (#623)
Reentrancy in VSLToken.transferFrom(address,address,uint256) (#298-306):
External calls:
- _transfer(sender,recipient,amount) (#302)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),getTime()) (#377-384)
External calls sending eth:
- _transfer(sender,recipient,amount) (#302)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- externalAddress.transfer(newBalance) (#495)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#358)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (#304)
Apply the check-effects-interactions pattern.

Additional information: link

Pragma version0.8.14 (#3) necessitates a version too recent to be trusted. Consider deploying with 0.6.12/0.7.6/0.8.7
solc-0.8.14 is not recommended for deployment
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

Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#67) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#68) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#69) is not in mixedCase
Function IUniswapV2Router01.WETH() (#89) is not in mixedCase
Parameter VSLToken.toggleTaxes(bool)._enabled (#511) is not in mixedCase
Parameter VSLToken.changeRouterVersion(address)._router (#609) is not in mixedCase
Parameter VSLToken.getExchangeID(address)._exchange (#637) is not in mixedCase
Parameter VSLToken.getExchangeAddress(uint256)._exchangeID (#643) is not in mixedCase
Parameter VSLToken.isExchangeAddress(address)._address (#668) is not in mixedCase
Parameter VSLToken.setupExchangeAddress(address,bool)._address (#675) is not in mixedCase
Parameter VSLToken.setupExchangeAddress(address,bool)._allowOrNot (#675) is not in mixedCase
Parameter VSLToken.setupAllowedContract(address,bool)._contractAddress (#716) is not in mixedCase
Parameter VSLToken.setupAllowedContract(address,bool)._allowOrNot (#716) is not in mixedCase
Function VSLToken.IsAddressInList(address) (#737-744) is not in mixedCase
Parameter VSLToken.isAllowedContract(address)._contractAddress (#767) is not in mixedCase
Parameter VSLToken.setStakingContract(address)._contractAddress (#774) is not in mixedCase
Parameter VSLToken.setExternalAddress(address)._externalAddress (#788) is not in mixedCase
Function VSLToken.TransferForeignTokens(address,address) (#803-811) is not in mixedCase
Parameter VSLToken.TransferForeignTokens(address,address)._token (#803) is not in mixedCase
Parameter VSLToken.TransferForeignTokens(address,address)._to (#803) is not in mixedCase
Function VSLToken.TransferForeignAmount(address,address,uint256) (#814-825) is not in mixedCase
Parameter VSLToken.TransferForeignAmount(address,address,uint256)._token (#814) is not in mixedCase
Parameter VSLToken.TransferForeignAmount(address,address,uint256)._to (#814) is not in mixedCase
Parameter VSLToken.TransferForeignAmount(address,address,uint256)._maxAmount (#814) is not in mixedCase
Function VSLToken.TransferBNBToAddress(address,uint256) (#828-832) is not in mixedCase
Function VSLToken.TransferAllBNBToAddress(address) (#835-839) is not in mixedCase
Constant VSLToken._name (#194) is not in UPPER_CASE_WITH_UNDERSCORES
Constant VSLToken._symbol (#195) is not in UPPER_CASE_WITH_UNDERSCORES
Constant VSLToken._decimals (#196) is not in UPPER_CASE_WITH_UNDERSCORES
Constant VSLToken._totalTokens (#198) is not in UPPER_CASE_WITH_UNDERSCORES
Constant VSLToken._marketTaxCap (#216) is not in UPPER_CASE_WITH_UNDERSCORES
Constant VSLToken._liquidityCap (#222) is not in UPPER_CASE_WITH_UNDERSCORES
Constant VSLToken._royaltyCap (#226) is not in UPPER_CASE_WITH_UNDERSCORES
Follow the Solidity naming convention.

Additional information: link

Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- externalAddress.transfer(newBalance) (#446)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
State variables written after the call(s):
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- _allowances[owner][spender] = amount (#357)
- _tokensOwned[stakingContract] += rtax (#472)
- _tokensOwned[address(this)] += tax (#477)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#358)
- (mtax + hltax != 0) && swapTokensForBNB(mtax + hltax) (#484)
- Transfer(from,stakingContract,rtax) (#473)
- Transfer(from,address(this),tax) (#478)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- externalAddress.transfer(newBalance) (#446)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
State variables written after the call(s):
- addLiquidity(hltax,newBalance) (#491)
- _allowances[owner][spender] = amount (#357)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#358)
- addLiquidity(hltax,newBalance) (#491)
Reentrancy in VSLToken._transfer(address,address,uint256) (#390-505):
External calls:
- externalAddress.transfer(newBalance) (#446)
- externalAddress.transfer(newBalance) (#495)
External calls sending eth:
- addLiquidity(hltax,newBalance) (#442)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- addLiquidity(hltax,newBalance) (#491)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#495)
State variables written after the call(s):
- _tokensOwned[to] += remaining (#503)
Event emitted after the call(s):
- Transfer(from,to,remaining) (#504)
Reentrancy in VSLToken.transferFrom(address,address,uint256) (#298-306):
External calls:
- _transfer(sender,recipient,amount) (#302)
- externalAddress.transfer(newBalance) (#446)
- externalAddress.transfer(newBalance) (#495)
External calls sending eth:
- _transfer(sender,recipient,amount) (#302)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),getTime()) (#348)
- externalAddress.transfer(newBalance) (#446)
- externalAddress.transfer(newBalance) (#495)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (#304)
- _allowances[owner][spender] = amount (#357)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#358)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (#304)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#91) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#91)
Prevent variables from having similar names.

Additional information: link

Token seems to be untradeable: there is no PancakeSwap trading pair and no trading volumes. Ignore for presale.

Number of Binance Smart Chain (BSC) token holders is less than 100. Token is either dead or inactive. Ignore for presale.

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

Young tokens have high risks of scam / price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank