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