ZUM Token

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

Reentrancy in ZumToken._transfer(address,address,uint256) (#993-1037):
External calls:
- swapAndLiquify(contractTokenBalance) (#1024)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1071-1077)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1024)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#949)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1118)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1127)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1138)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#865)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1119)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1129)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1139)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#867)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _rTotal = _rTotal.sub(rFee) (#904)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#951)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#864)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1137)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1128)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#866)
Apply the check-effects-interactions pattern.

Additional information: link

Contract ownership is not renounced (belongs to a wallet)

ZumToken.addLiquidity(uint256,uint256) (#1080-1093) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
Ensure that all the return values of the function calls are used.

Additional information: link

Redundant expression "this (#242)" inContext (#236-245)
Remove redundant statements if they congest code but offer no value.

Additional information: link

ZumToken.includeInReward(address) (#850-861) has costly operations inside a loop:
- _excluded.pop() (#857)
Use a local variable to hold the loop computation result.

Additional information: link

ZumToken.numTokensSellToAddToLiquidity (#721) should be constant
ZumToken._name (#704) should be constant
ZumToken._symbol (#705) should be constant
ZumToken._decimals (#706) should be constant
ZumToken._tTotal (#700) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

allowance(address,address) should be declared external:
- ZumToken.allowance(address,address) (#781-783)
decreaseAllowance(address,uint256) should be declared external:
- ZumToken.decreaseAllowance(address,uint256) (#801-804)
name() should be declared external:
- ZumToken.name() (#755-757)
excludeFromFee(address) should be declared external:
- ZumToken.excludeFromFee(address) (#873-875)
transfer(address,uint256) should be declared external:
- ZumToken.transfer(address,uint256) (#776-779)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#436-439)
approve(address,uint256) should be declared external:
- ZumToken.approve(address,uint256) (#785-788)
reflectionFromToken(uint256,bool) should be declared external:
- ZumToken.reflectionFromToken(uint256,bool) (#823-832)
deliver(uint256) should be declared external:
- ZumToken.deliver(uint256) (#814-821)
excludeFromReward(address) should be declared external:
- ZumToken.excludeFromReward(address) (#840-848)
symbol() should be declared external:
- ZumToken.symbol() (#759-761)
increaseAllowance(address,uint256) should be declared external:
- ZumToken.increaseAllowance(address,uint256) (#796-799)
decimals() should be declared external:
- ZumToken.decimals() (#763-765)
isExcludedFromFee(address) should be declared external:
- ZumToken.isExcludedFromFee(address) (#981-983)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#445-449)
includeInFee(address) should be declared external:
- ZumToken.includeInFee(address) (#877-879)
totalFees() should be declared external:
- ZumToken.totalFees() (#810-812)
geUnlockTime() should be declared external:
- Ownable.geUnlockTime() (#451-453)
totalSupply() should be declared external:
- ZumToken.totalSupply() (#767-769)
isExcludedFromReward(address) should be declared external:
- ZumToken.isExcludedFromReward(address) (#806-808)
unlock() should be declared external:
- Ownable.unlock() (#464-469)
setSwapAndLiquifyEnabled(bool) should be declared external:
- ZumToken.setSwapAndLiquifyEnabled(bool) (#895-898)
lock(uint256) should be declared external:
- Ownable.lock(uint256) (#456-461)
transferFrom(address,address,uint256) should be declared external:
- ZumToken.transferFrom(address,address,uint256) (#790-794)
Use the external attribute for functions never called from the contract.

Additional information: link

ZumToken.allowance(address,address).owner (#781) shadows:
- Ownable.owner() (#417-419) (function)
ZumToken._approve(address,address,uint256).owner (#985) shadows:
- Ownable.owner() (#417-419) (function)
Rename the local variables that shadow another component.

Additional information: link

ZumToken.setMaxTxPercent(uint256) (#889-893) should emit an event for:
- _maxTxAmount = _tTotal.mul(maxTxPercent).div(10 ** 2) (#890-892)
ZumToken.setLiquidityFeePercent(uint256) (#885-887) should emit an event for:
- _liquidityFee = liquidityFee (#886)
ZumToken.setTaxFeePercent(uint256) (#881-883) should emit an event for:
- _taxFee = taxFee (#882)
Emit an event for critical parameter changes.

Additional information: link

Reentrancy in ZumToken.swapAndLiquify(uint256) (#1039-1060):
External calls:
- swapTokensForEth(half) (#1051)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1071-1077)
- addLiquidity(otherHalf,newBalance) (#1057)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1057)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
State variables written after the call(s):
- addLiquidity(otherHalf,newBalance) (#1057)
- _allowances[owner][spender] = amount (#989)
Reentrancy in ZumToken.transferFrom(address,address,uint256) (#790-794):
External calls:
- _transfer(sender,recipient,amount) (#791)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1071-1077)
External calls sending eth:
- _transfer(sender,recipient,amount) (#791)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#792)
- _allowances[owner][spender] = amount (#989)
Reentrancy in ZumToken._transfer(address,address,uint256) (#993-1037):
External calls:
- swapAndLiquify(contractTokenBalance) (#1024)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1071-1077)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1024)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _liquidityFee = _previousLiquidityFee (#978)
- _liquidityFee = 0 (#973)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _previousLiquidityFee = _liquidityFee (#970)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _previousTaxFee = _taxFee (#969)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _tFeeTotal = _tFeeTotal.add(tFee) (#905)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- _taxFee = _previousTaxFee (#977)
- _taxFee = 0 (#972)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in ZumToken.swapAndLiquify(uint256) (#1039-1060):
External calls:
- swapTokensForEth(half) (#1051)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1071-1077)
- addLiquidity(otherHalf,newBalance) (#1057)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1057)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#990)
- addLiquidity(otherHalf,newBalance) (#1057)
- SwapAndLiquify(half,newBalance,otherHalf) (#1059)
Reentrancy in ZumToken.transferFrom(address,address,uint256) (#790-794):
External calls:
- _transfer(sender,recipient,amount) (#791)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1071-1077)
External calls sending eth:
- _transfer(sender,recipient,amount) (#791)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#990)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#792)
Reentrancy in ZumToken._transfer(address,address,uint256) (#993-1037):
External calls:
- swapAndLiquify(contractTokenBalance) (#1024)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1071-1077)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1024)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1085-1092)
Event emitted after the call(s):
- Transfer(sender,recipient,tTransferAmount) (#1122)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- Transfer(sender,recipient,tTransferAmount) (#1132)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- Transfer(sender,recipient,tTransferAmount) (#1142)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
- Transfer(sender,recipient,tTransferAmount) (#870)
- _tokenTransfer(from,to,amount,takeFee) (#1036)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#464-469) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (#466)
Avoid relying on block.timestamp.

Additional information: link

Address.isContract(address) (#269-278) uses assembly
- INLINE ASM (#276)
Address._functionCallWithValue(address,bytes,uint256,string) (#362-383) uses assembly
- INLINE ASM (#375-378)
Do not use evm assembly.

Additional information: link

Address.sendValue(address,uint256) (#296-302) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#347-349) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#230-233) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#357-360) is never used and should be removed
Context._msgData() (#241-244) is never used and should be removed
SafeMath.mod(uint256,uint256) (#214-216) is never used and should be removed
Address._functionCallWithValue(address,bytes,uint256,string) (#362-383) is never used and should be removed
Address.isContract(address) (#269-278) is never used and should be removed
Address.functionCall(address,bytes,string) (#332-334) is never used and should be removed
Address.functionCall(address,bytes) (#322-324) is never used and should be removed
Remove unused functions.

Additional information: link

ZumToken._previousTaxFee (#709) is set pre-construction with a non-constant function or state variable:
- _taxFee
ZumToken._rTotal (#701) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
ZumToken._previousLiquidityFee (#712) is set pre-construction with a non-constant function or state variable:
- _liquidityFee
Remove any initialization of state variables via non-constant state variables or function calls. If variables must be set upon contract deployment, locate initialization in the constructor instead.

Additional information: link

Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#362-383):
- (success,returndata) = target.call{value: weiValue}(data) (#366)
Low level call in Address.sendValue(address,uint256) (#296-302):
- (success) = recipient.call{value: amount}() (#300)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Parameter ZumToken.setSwapAndLiquifyEnabled(bool)._enabled (#895) is not in mixedCase
Variable ZumToken._liquidityFee (#711) is not in mixedCase
Variable ZumToken._taxFee (#708) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#509) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#526) is not in mixedCase
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#508) is not in mixedCase
Parameter ZumToken.calculateTaxFee(uint256)._amount (#954) is not in mixedCase
Variable ZumToken._maxTxAmount (#720) is not in mixedCase
Parameter ZumToken.calculateLiquidityFee(uint256)._amount (#960) is not in mixedCase
Function IUniswapV2Router01.WETH() (#548) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable ZumToken._transferBothExcluded(address,address,uint256).rTransferAmount (#863) is too similar to ZumToken._getTValues(uint256).tTransferAmount (#917)
Variable ZumToken.reflectionFromToken(uint256,bool).rTransferAmount (#829) is too similar to ZumToken._transferBothExcluded(address,address,uint256).tTransferAmount (#863)
Variable ZumToken._getValues(uint256).rTransferAmount (#910) is too similar to ZumToken._transferBothExcluded(address,address,uint256).tTransferAmount (#863)
Variable ZumToken._transferFromExcluded(address,address,uint256).rTransferAmount (#1136) is too similar to ZumToken._getTValues(uint256).tTransferAmount (#917)
Variable ZumToken._getValues(uint256).rTransferAmount (#910) is too similar to ZumToken._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Variable ZumToken._transferBothExcluded(address,address,uint256).rTransferAmount (#863) is too similar to ZumToken._transferStandard(address,address,uint256).tTransferAmount (#1117)
Variable ZumToken._transferFromExcluded(address,address,uint256).rTransferAmount (#1136) is too similar to ZumToken._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Variable ZumToken.reflectionFromToken(uint256,bool).rTransferAmount (#829) is too similar to ZumToken._getTValues(uint256).tTransferAmount (#917)
Variable ZumToken._transferBothExcluded(address,address,uint256).rTransferAmount (#863) is too similar to ZumToken._transferFromExcluded(address,address,uint256).tTransferAmount (#1136)
Variable ZumToken._transferBothExcluded(address,address,uint256).rTransferAmount (#863) is too similar to ZumToken._getValues(uint256).tTransferAmount (#909)
Variable ZumToken.reflectionFromToken(uint256,bool).rTransferAmount (#829) is too similar to ZumToken._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Variable ZumToken._transferStandard(address,address,uint256).rTransferAmount (#1117) is too similar to ZumToken._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Variable ZumToken._transferStandard(address,address,uint256).rTransferAmount (#1117) is too similar to ZumToken._transferBothExcluded(address,address,uint256).tTransferAmount (#863)
Variable ZumToken._getValues(uint256).rTransferAmount (#910) is too similar to ZumToken._transferStandard(address,address,uint256).tTransferAmount (#1117)
Variable ZumToken._getValues(uint256).rTransferAmount (#910) is too similar to ZumToken._getValues(uint256).tTransferAmount (#909)
Variable ZumToken._transferToExcluded(address,address,uint256).rTransferAmount (#1126) is too similar to ZumToken._getValues(uint256).tTransferAmount (#909)
Variable ZumToken._transferStandard(address,address,uint256).rTransferAmount (#1117) is too similar to ZumToken._getTValues(uint256).tTransferAmount (#917)
Variable ZumToken._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#925) is too similar to ZumToken._getValues(uint256).tTransferAmount (#909)
Variable ZumToken._transferFromExcluded(address,address,uint256).rTransferAmount (#1136) is too similar to ZumToken._transferStandard(address,address,uint256).tTransferAmount (#1117)
Variable ZumToken._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#925) is too similar to ZumToken._transferFromExcluded(address,address,uint256).tTransferAmount (#1136)
Variable ZumToken._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#925) is too similar to ZumToken._transferBothExcluded(address,address,uint256).tTransferAmount (#863)
Variable ZumToken._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#925) is too similar to ZumToken._getTValues(uint256).tTransferAmount (#917)
Variable ZumToken._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#925) is too similar to ZumToken._transferStandard(address,address,uint256).tTransferAmount (#1117)
Variable ZumToken._transferFromExcluded(address,address,uint256).rTransferAmount (#1136) is too similar to ZumToken._transferBothExcluded(address,address,uint256).tTransferAmount (#863)
Variable ZumToken._getValues(uint256).rTransferAmount (#910) is too similar to ZumToken._transferFromExcluded(address,address,uint256).tTransferAmount (#1136)
Variable ZumToken._transferStandard(address,address,uint256).rTransferAmount (#1117) is too similar to ZumToken._transferFromExcluded(address,address,uint256).tTransferAmount (#1136)
Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#553) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#554)
Variable ZumToken._transferBothExcluded(address,address,uint256).rTransferAmount (#863) is too similar to ZumToken._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Variable ZumToken._transferToExcluded(address,address,uint256).rTransferAmount (#1126) is too similar to ZumToken._transferStandard(address,address,uint256).tTransferAmount (#1117)
Variable ZumToken.reflectionFromToken(uint256,bool).rTransferAmount (#829) is too similar to ZumToken._transferFromExcluded(address,address,uint256).tTransferAmount (#1136)
Variable ZumToken._getValues(uint256).rTransferAmount (#910) is too similar to ZumToken._getTValues(uint256).tTransferAmount (#917)
Variable ZumToken._transferToExcluded(address,address,uint256).rTransferAmount (#1126) is too similar to ZumToken._getTValues(uint256).tTransferAmount (#917)
Variable ZumToken._transferStandard(address,address,uint256).rTransferAmount (#1117) is too similar to ZumToken._getValues(uint256).tTransferAmount (#909)
Variable ZumToken._transferStandard(address,address,uint256).rTransferAmount (#1117) is too similar to ZumToken._transferStandard(address,address,uint256).tTransferAmount (#1117)
Variable ZumToken._transferFromExcluded(address,address,uint256).rTransferAmount (#1136) is too similar to ZumToken._getValues(uint256).tTransferAmount (#909)
Variable ZumToken.reflectionFromToken(uint256,bool).rTransferAmount (#829) is too similar to ZumToken._transferStandard(address,address,uint256).tTransferAmount (#1117)
Variable ZumToken._transferToExcluded(address,address,uint256).rTransferAmount (#1126) is too similar to ZumToken._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Variable ZumToken._transferToExcluded(address,address,uint256).rTransferAmount (#1126) is too similar to ZumToken._transferBothExcluded(address,address,uint256).tTransferAmount (#863)
Variable ZumToken._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#925) is too similar to ZumToken._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Variable ZumToken.reflectionFromToken(uint256,bool).rTransferAmount (#829) is too similar to ZumToken._getValues(uint256).tTransferAmount (#909)
Variable ZumToken._transferToExcluded(address,address,uint256).rTransferAmount (#1126) is too similar to ZumToken._transferFromExcluded(address,address,uint256).tTransferAmount (#1136)
Variable ZumToken._transferFromExcluded(address,address,uint256).rTransferAmount (#1136) is too similar to ZumToken._transferFromExcluded(address,address,uint256).tTransferAmount (#1136)
Variable ZumToken._transferBothExcluded(address,address,uint256).rTransferAmount (#863) is too similar to ZumToken._transferBothExcluded(address,address,uint256).tTransferAmount (#863)
Prevent variables from having similar names.

Additional information: link

ZumToken.slitherConstructorVariables() (#686-1149) uses literals with too many digits:
- _tTotal = 100000 * 10 ** 6 * 10 ** 9 (#700)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

Contract has 20% buy tax and 19% sell tax.
Taxes are suspiciously high (over 10%) and contract ownership is not renounced. Token has a high risk of becoming a honeypot.

Unable to find PancakeSwap trading pair to compute liquidity.

Unable to find PancakeSwap trading pair to compute number of swaps.

Unable to find token contract audit

Unable to find audit link on the website

Unable to find whitepaper link on the website

Unable to find Telegram link on the website

Unable to find Twitter link on the website

Token is not listed at Mobula.Finance

Additional information: link

Unable to find token on CoinHunt

Additional information: link

Token has relatively low CoinGecko rank