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VRTX [VortexCash] Token

ALERT: rug pull scam

About VRTX

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Token 3 months

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Laser Scorebeta Last Audit: 10 February 2022

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Code:


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

Reentrancy in VortexCash._transfer(address,address,uint256) (#494-520):
External calls:
- handle_fees() (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#548)
External calls sending eth:
- handle_fees() (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
State variables written after the call(s):
- super._transfer(sender,recipient,amount - fee) (#513)
- _balances[sender] = senderBalance - amount (#301)
- _balances[recipient] += amount (#302)
- super._transfer(sender,address(this),fee) (#517)
- _balances[sender] = senderBalance - amount (#301)
- _balances[recipient] += amount (#302)
Apply the check-effects-interactions pattern.

Additional information: link

VortexCash.addLiquidity(uint256,uint256) (#552-565) ignores return value by router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
Ensure that all the return values of the function calls are used.

Additional information: link

VortexCash.changeFees(uint16,uint16) (#579-582) should emit an event for:
- feeliq_buy = _feeliq_buy (#580)
- feeliq_sell = _feeliq_sell (#581)
Emit an event for critical parameter changes.

Additional information: link

Modifier VortexCash.mutexLock() (#470-476) does not always execute _; or revert
All the paths in a modifier must execute _ or revert.

Additional information: link

Reentrancy in VortexCash.constructor() (#478-491):
External calls:
- _pair = IFactory(_router.factory()).createPair(address(this),_router.WETH()) (#484-485)
State variables written after the call(s):
- exemptFee[address(this)] = true (#490)
- pair = _pair (#488)
- router = _router (#487)
Reentrancy in VortexCash.handle_fees() (#522-536):
External calls:
- swapTokensForBNB(exchange) (#531)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#548)
- addLiquidity(exchangeOtherHalf,bnbBalance) (#534)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
External calls sending eth:
- addLiquidity(exchangeOtherHalf,bnbBalance) (#534)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
State variables written after the call(s):
- addLiquidity(exchangeOtherHalf,bnbBalance) (#534)
- _allowances[owner][spender] = amount (#367)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in VortexCash._transfer(address,address,uint256) (#494-520):
External calls:
- handle_fees() (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#548)
External calls sending eth:
- handle_fees() (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (#304)
- super._transfer(sender,address(this),fee) (#517)
- Transfer(sender,recipient,amount) (#304)
- super._transfer(sender,recipient,amount - fee) (#513)
Reentrancy in VortexCash.handle_fees() (#522-536):
External calls:
- swapTokensForBNB(exchange) (#531)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#548)
- addLiquidity(exchangeOtherHalf,bnbBalance) (#534)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
External calls sending eth:
- addLiquidity(exchangeOtherHalf,bnbBalance) (#534)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#557-564)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#368)
- addLiquidity(exchangeOtherHalf,bnbBalance) (#534)
Apply the check-effects-interactions pattern.

Additional information: link

Address.isContract(address) (#41-50) uses assembly
- INLINE ASM (#48)
Address._functionCallWithValue(address,bytes,uint256,string) (#78-95) uses assembly
- INLINE ASM (#87-90)
Do not use evm assembly.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#78-95) is never used and should be removed
Address.functionCall(address,bytes) (#61-63) is never used and should be removed
Address.functionCall(address,bytes,string) (#65-67) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#69-71) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#73-76) is never used and should be removed
Address.isContract(address) (#41-50) is never used and should be removed
Address.sendValue(address,uint256) (#52-58) is never used and should be removed
Context._msgData() (#17-20) is never used and should be removed
ERC20._burn(address,uint256) (#337-348) is never used and should be removed
Remove unused functions.

Additional information: link

Low level call in Address.sendValue(address,uint256) (#52-58):
- (success) = recipient.call{value: amount}() (#56)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#78-95):
- (success,returndata) = target.call{value: weiValue}(data) (#81)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IRouter.WETH() (#428) is not in mixedCase
Function VortexCash.handle_fees() (#522-536) is not in mixedCase
Parameter VortexCash.changeLiquidityTreshhold(uint256).new_amount (#573) is not in mixedCase
Parameter VortexCash.changeFees(uint16,uint16)._feeliq_buy (#579) is not in mixedCase
Parameter VortexCash.changeFees(uint16,uint16)._feeliq_sell (#579) is not in mixedCase
Parameter VortexCash.updateExemptFee(address,bool)._address (#585) is not in mixedCase
Variable VortexCash._tokenLiquidityThreshold (#455) is not in mixedCase
Variable VortexCash.ProvidingLiquidity (#456) is not in mixedCase
Variable VortexCash.feeliq_buy (#459) is not in mixedCase
Variable VortexCash.feeliq_sell (#460) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#18)" inContext (#12-21)
Remove redundant statements if they congest code but offer no value.

Additional information: link

name() should be declared external:
- ERC20.name() (#142-144)
symbol() should be declared external:
- ERC20.symbol() (#150-152)
totalSupply() should be declared external:
- ERC20.totalSupply() (#174-176)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#193-196)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#201-203)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#212-215)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#230-238)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#252-255)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#271-277)
owner() should be declared external:
- Ownable.owner() (#400-402)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#409-412)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#414-418)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


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.


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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

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