DKYC [DontKYC] Token

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

DontKYC.swapBack() (#711-762) sends eth to arbitrary user
Dangerous calls:
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

DividendDistributor.distributeDividend(address) (#469-480) ignores return value by BUSD.transfer(shareholder,amount) (#475)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

Reentrancy in DontKYC._transferFrom(address,address,uint256) (#627-649):
External calls:
- swapBack() (#633)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#722-761)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
External calls sending eth:
- swapBack() (#633)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
State variables written after the call(s):
- _balances[sender] = _balances[sender].sub(amount,Insufficient Balance) (#637)
- _balances[recipient] = _balances[recipient].add(amountReceived) (#640)
- amountReceived = takeFee(sender,recipient,amount) (#639)
- _balances[address(this)] = _balances[address(this)].add(feeAmount) (#690)
Apply the check-effects-interactions pattern.

Additional information: link

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.

Contract ownership is not renounced (belongs to a wallet)

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.

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.

DontKYC.swapBack() (#711-762) ignores return value by address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
Ensure that the return value of a low-level call is checked or logged.

Additional information: link

Variable 'DontKYC.buyTokens(uint256,address).reason (#788)' in DontKYC.buyTokens(uint256,address) (#776-793) potentially used before declaration: revert(string)(string(abi.encodePacked(Buyback failed with error ,reason))) (#789)
Variable 'DontKYC.swapBack().e (#757)' in DontKYC.swapBack() (#711-762) potentially used before declaration: SwapBackFailed(string(abi.encodePacked(SwapBack failed with error ,e))) (#758)
Move all variable declarations prior to any usage of the variable, and ensure that reaching a variable declaration does not depend on some conditional if it is used unconditionally.

Additional information: link

DividendDistributor.dividendsPerShareAccuracyFactor (#372) should be constant
DontKYC.ZERO (#519) should be constant
DividendDistributor.WBNB (#359) should be constant
DontKYC.WBNB (#517) should be constant
DontKYC._totalSupply (#525) should be constant
DontKYC.BUSD (#516) should be constant
DontKYC.DEAD (#518) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

DividendDistributor.distributeDividend(address) (#469-480) has external calls inside a loop: BUSD.transfer(shareholder,amount) (#475)
Favor pull over push strategy for external calls.

Additional information: link

DontKYC.swapBack().e (#757) is a local variable never initialized
RSunAuth.constructor(address).i (#173) is a local variable never initialized
RSunAuth.transferOwnership(address).i (#284) is a local variable never initialized
RSunAuth.authorizeForMultiplePermissions(address,string[]).i (#226) is a local variable never initialized
DontKYC.buyTokens(uint256,address).reason (#788) is a local variable never initialized
RSunAuth.unauthorizeForMultiplePermissions(address,string[]).i (#250) 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

Low level call in DontKYC.swapBack() (#711-762):
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#100) is too similar to IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#101)
Prevent variables from having similar names.

Additional information: link

DontKYC.BUSD (#516) is never used in DontKYC (#513-909)
Remove unused state variables.

Additional information: link

Reentrancy in DividendDistributor.deposit() (#418-436):
External calls:
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: msg.value}(0,path,address(this),block.timestamp) (#425-430)
State variables written after the call(s):
- dividendsPerShare = dividendsPerShare.add(dividendsPerShareAccuracyFactor.mul(amount).div(totalShares)) (#435)
- totalDividends = totalDividends.add(amount) (#434)
Reentrancy in DontKYC.triggerBuyback(uint256,bool) (#764-770):
External calls:
- buyTokens(amount,DEAD) (#765)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#781-792)
State variables written after the call(s):
- buybackMultiplierTriggeredAt = block.timestamp (#767)
Reentrancy in DontKYC._transferFrom(address,address,uint256) (#627-649):
External calls:
- swapBack() (#633)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#722-761)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
External calls sending eth:
- swapBack() (#633)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
State variables written after the call(s):
- launch() (#635)
- launchedAt = block.number (#807)
Reentrancy in DividendDistributor.setShare(address,uint256) (#402-416):
External calls:
- distributeDividend(shareholder) (#404)
- BUSD.transfer(shareholder,amount) (#475)
State variables written after the call(s):
- addShareholder(shareholder) (#408)
- shareholderIndexes[shareholder] = shareholders.length (#502)
- removeShareholder(shareholder) (#410)
- shareholderIndexes[shareholders[shareholders.length - 1]] = shareholderIndexes[shareholder] (#508)
- addShareholder(shareholder) (#408)
- shareholders.push(shareholder) (#503)
- removeShareholder(shareholder) (#410)
- shareholders[shareholderIndexes[shareholder]] = shareholders[shareholders.length - 1] (#507)
- shareholders.pop() (#509)
- totalShares = totalShares.sub(shares[shareholder].amount).add(amount) (#413)
Reentrancy in DividendDistributor.distributeDividend(address) (#469-480):
External calls:
- BUSD.transfer(shareholder,amount) (#475)
State variables written after the call(s):
- shareholderClaims[shareholder] = block.timestamp (#476)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in DontKYC.triggerBuyback(uint256,bool) (#764-770):
External calls:
- buyTokens(amount,DEAD) (#765)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#781-792)
Event emitted after the call(s):
- BuybackMultiplierActive(buybackMultiplierLength) (#768)
Reentrancy in DontKYC.buyTokens(uint256,address) (#776-793):
External calls:
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,to,block.timestamp) (#781-792)
Event emitted after the call(s):
- BoughtBack(amount,to) (#787)
Reentrancy in DontKYC.swapBack() (#711-762):
External calls:
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#722-761)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
External calls sending eth:
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
Event emitted after the call(s):
- AutoLiquify(amountToLiquify,amountBNBLiquidity) (#750)
- AutoLiquify(0,0) (#752)
- SwapBackSuccess(amountToSwap) (#756)
Reentrancy in DontKYC._transferFrom(address,address,uint256) (#627-649):
External calls:
- swapBack() (#633)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#722-761)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
External calls sending eth:
- swapBack() (#633)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
Event emitted after the call(s):
- Launched(block.number,block.timestamp) (#808)
- launch() (#635)
- Transfer(sender,address(this),feeAmount) (#691)
- amountReceived = takeFee(sender,recipient,amount) (#639)
Reentrancy in DontKYC._transferFrom(address,address,uint256) (#627-649):
External calls:
- swapBack() (#633)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#722-761)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
- distributor.setShare(sender,_balances[sender]) (#642)
- distributor.setShare(recipient,_balances[recipient]) (#643)
- distributor.process(distributorGas) (#645)
External calls sending eth:
- swapBack() (#633)
- distributor.deposit{value: amountBNBReflection}() (#738)
- address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#739)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
Event emitted after the call(s):
- Transfer(sender,recipient,amountReceived) (#647)
Reentrancy in DontKYC.swapBack() (#711-762):
External calls:
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#722-761)
Event emitted after the call(s):
- SwapBackFailed(string(abi.encodePacked(SwapBack failed with error ,e))) (#758)
- SwapBackFailed(SwapBack failed without an error message from pancakeSwap) (#760)
Apply the check-effects-interactions pattern.

Additional information: link

Constant DontKYC._decimals (#523) is not in UPPER_CASE_WITH_UNDERSCORES
Variable DontKYC._totalSupply (#525) is not in mixedCase
Function IDEXRouter.WETH() (#95) is not in mixedCase
Parameter DontKYC.setFeeReceivers(address,address)._marketingFeeReceiver (#846) is not in mixedCase
Parameter DontKYC.setFees(uint256,uint256,uint256,uint256,uint256,uint256)._reflectionFee (#834) is not in mixedCase
Parameter DontKYC.setTargetLiquidity(uint256,uint256)._target (#856) is not in mixedCase
Variable DontKYC.ZERO (#519) is not in mixedCase
Parameter DontKYC.setFeeReceivers(address,address)._autoLiquidityReceiver (#846) is not in mixedCase
Parameter DontKYC.setDistributionCriteria(uint256,uint256)._minPeriod (#861) is not in mixedCase
Constant DontKYC._name (#521) is not in UPPER_CASE_WITH_UNDERSCORES
Parameter DontKYC.setDistributionCriteria(uint256,uint256)._minDistribution (#861) is not in mixedCase
Variable DontKYC.WBNB (#517) is not in mixedCase
Variable DividendDistributor.BUSD (#358) is not in mixedCase
Parameter DontKYC.setFees(uint256,uint256,uint256,uint256,uint256,uint256)._marketingFee (#834) is not in mixedCase
Variable DontKYC._maxTxAmount (#526) is not in mixedCase
Parameter DontKYC.setFeesOnNormalTransfers(bool)._enabled (#894) is not in mixedCase
Variable DontKYC.BUSD (#516) is not in mixedCase
Variable DontKYC._balances (#528) is not in mixedCase
Constant DontKYC._symbol (#522) is not in UPPER_CASE_WITH_UNDERSCORES
Parameter DontKYC.setSwapBackSettings(bool,uint256)._enabled (#851) is not in mixedCase
Parameter DontKYC.setFees(uint256,uint256,uint256,uint256,uint256,uint256)._buybackFee (#834) is not in mixedCase
Parameter DontKYC.setFees(uint256,uint256,uint256,uint256,uint256,uint256)._totalSellFee (#834) is not in mixedCase
Parameter DontKYC.setFees(uint256,uint256,uint256,uint256,uint256,uint256)._feeDenominator (#834) is not in mixedCase
Parameter DontKYC.setFees(uint256,uint256,uint256,uint256,uint256,uint256)._liquidityFee (#834) is not in mixedCase
Parameter DividendDistributor.setDistributionCriteria(uint256,uint256)._minDistribution (#397) is not in mixedCase
Variable DontKYC._allowances (#529) is not in mixedCase
Parameter DividendDistributor.setDistributionCriteria(uint256,uint256)._minPeriod (#397) is not in mixedCase
Variable DividendDistributor._token (#350) is not in mixedCase
Variable DividendDistributor.WBNB (#359) is not in mixedCase
Variable DontKYC.DEAD (#518) is not in mixedCase
Parameter DontKYC.setSwapBackSettings(bool,uint256)._amount (#851) is not in mixedCase
Parameter DontKYC.setTargetLiquidity(uint256,uint256)._denominator (#856) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

DontKYC.slitherConstructorVariables() (#513-909) uses literals with too many digits:
- DEAD = 0x000000000000000000000000000000000000dEaD (#518)
DontKYC.slitherConstructorVariables() (#513-909) uses literals with too many digits:
- distributorGas = 500000 (#563)
DontKYC.setDistributorSettings(uint256) (#865-868) uses literals with too many digits:
- require(bool)(gas <= 1000000) (#866)
DontKYC.slitherConstructorVariables() (#513-909) uses literals with too many digits:
- ZERO = 0x0000000000000000000000000000000000000000 (#519)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

Reentrancy in DividendDistributor.process(uint256) (#438-462):
External calls:
- distributeDividend(shareholders[currentIndex]) (#454)
- BUSD.transfer(shareholder,amount) (#475)
State variables written after the call(s):
- currentIndex ++ (#459)
Reentrancy in DividendDistributor.distributeDividend(address) (#469-480):
External calls:
- BUSD.transfer(shareholder,amount) (#475)
State variables written after the call(s):
- shares[shareholder].totalRealised = shares[shareholder].totalRealised.add(amount) (#477)
- shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount) (#478)
Reentrancy in DividendDistributor.setShare(address,uint256) (#402-416):
External calls:
- distributeDividend(shareholder) (#404)
- BUSD.transfer(shareholder,amount) (#475)
State variables written after the call(s):
- shares[shareholder].amount = amount (#414)
- shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount) (#415)
Apply the check-effects-interactions pattern.

Additional information: link

DontKYC.swapBack() (#711-762) ignores return value by router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#742-753)
Ensure that all the return values of the function calls are used.

Additional information: link

DontKYC.setTxLimit(uint256) (#811-814) should emit an event for:
- _maxTxAmount = amount (#813)
DontKYC.setSwapBackSettings(bool,uint256) (#851-854) should emit an event for:
- swapThreshold = _amount (#853)
DontKYC.setBuybackMultiplierSettings(uint256,uint256,uint256) (#795-800) should emit an event for:
- buybackMultiplierNumerator = numerator (#797)
- buybackMultiplierDenominator = denominator (#798)
- buybackMultiplierLength = length (#799)
DontKYC.setLaunchedAt(uint256) (#898-900) should emit an event for:
- launchedAt = launched_ (#899)
DividendDistributor.setDistributionCriteria(uint256,uint256) (#397-400) should emit an event for:
- minPeriod = _minPeriod (#398)
- minDistribution = _minDistribution (#399)
DontKYC.setFees(uint256,uint256,uint256,uint256,uint256,uint256) (#834-844) should emit an event for:
- liquidityFee = _liquidityFee (#835)
- reflectionFee = _reflectionFee (#837)
- marketingFee = _marketingFee (#838)
- totalBuyFee = _liquidityFee.add(_buybackFee).add(_reflectionFee).add(_marketingFee) (#839)
- feeDenominator = _feeDenominator (#840)
- totalSellFee = _totalSellFee (#841)
DontKYC.setTargetLiquidity(uint256,uint256) (#856-859) should emit an event for:
- targetLiquidity = _target (#857)
- targetLiquidityDenominator = _denominator (#858)
Emit an event for critical parameter changes.

Additional information: link

DontKYC.setFeeReceivers(address,address)._autoLiquidityReceiver (#846) lacks a zero-check on :
- autoLiquidityReceiver = _autoLiquidityReceiver (#847)
DontKYC.setFeeReceivers(address,address)._marketingFeeReceiver (#846) lacks a zero-check on :
- marketingFeeReceiver = _marketingFeeReceiver (#848)
RSunAuth.transferOwnership(address).adr (#281) lacks a zero-check on :
- owner = adr (#283)
DontKYC.constructor().owner_ (#578) lacks a zero-check on :
- autoLiquidityReceiver = owner_ (#588)
- marketingFeeReceiver = owner_ (#589)
Check that the address is not zero.

Additional information: link

DontKYC.shouldSwapBack() (#704-709) uses timestamp for comparisons
Dangerous comparisons:
- msg.sender != pancakeV2BNBPair && ! inSwap && swapEnabled && _balances[address(this)] >= swapThreshold (#705-708)
DividendDistributor.shouldDistribute(address) (#464-467) uses timestamp for comparisons
Dangerous comparisons:
- shareholderClaims[shareholder] + minPeriod < block.timestamp && getUnpaidEarnings(shareholder) > minDistribution (#465-466)
RSunAuth.unlockPermission(string) (#325-330) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(block.timestamp > getPermissionUnlockTime(permissionName),Permission is locked until the expiry time.) (#326)
DontKYC.getTotalFee(bool) (#674-678) uses timestamp for comparisons
Dangerous comparisons:
- selling && buybackMultiplierTriggeredAt.add(buybackMultiplierLength) > block.timestamp (#676)
DontKYC.isOverLiquified(uint256,uint256) (#878-880) uses timestamp for comparisons
Dangerous comparisons:
- getLiquidityBacking(accuracy) > target (#879)
DontKYC._transferFrom(address,address,uint256) (#627-649) uses timestamp for comparisons
Dangerous comparisons:
- require(bool)(_balances[sender] > 0) (#635)
Avoid relying on block.timestamp.

Additional information: link

DividendDistributor.process(uint256) (#438-462) has costly operations inside a loop:
- currentIndex = 0 (#450)
DividendDistributor.distributeDividend(address) (#469-480) has costly operations inside a loop:
- totalDistributed = totalDistributed.add(amount) (#474)
DividendDistributor.process(uint256) (#438-462) has costly operations inside a loop:
- currentIndex ++ (#459)
Use a local variable to hold the loop computation result.

Additional information: link

DontKYC.swapThreshold (#566) is set pre-construction with a non-constant function or state variable:
- _totalSupply / 5000
DontKYC._maxTxAmount (#526) is set pre-construction with a non-constant function or state variable:
- _totalSupply / 1000
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

authorizeFor(address,string) should be declared external:
- RSunAuth.authorizeFor(address,string) (#216-220)
unauthorizeFor(address,string) should be declared external:
- RSunAuth.unauthorizeFor(address,string) (#236-242)
isLocked(string) should be declared external:
- RSunAuth.isLocked(string) (#308-310)
unauthorizeForMultiplePermissions(address,string[]) should be declared external:
- RSunAuth.unauthorizeForMultiplePermissions(address,string[]) (#247-255)
getPermissionNameToIndex(string) should be declared external:
- RSunAuth.getPermissionNameToIndex(string) (#294-296)
authorizeForMultiplePermissions(address,string[]) should be declared external:
- RSunAuth.authorizeForMultiplePermissions(address,string[]) (#225-231)
unlockPermission(string) should be declared external:
- RSunAuth.unlockPermission(string) (#325-330)
lockPermission(string,uint64) should be declared external:
- RSunAuth.lockPermission(string,uint64) (#315-320)
transferOwnership(address) should be declared external:
- RSunAuth.transferOwnership(address) (#281-289)
isAuthorizedFor(address,string) should be declared external:
- RSunAuth.isAuthorizedFor(address,string) (#267-269)
Use the external attribute for functions never called from the contract.

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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

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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 is deployed only at one blockchain

Token was delisted (assigned to inactive / untracked listing) from CoinMarketCap

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Token was delisted from CoinGecko

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Unable to find token contract audit

Unable to find audit link on the website

Unable to find token on CoinHunt

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Unable to find code repository for the project

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

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Token has no active CoinMarketCap listing / rank

Token has no active CoinGecko listing / rank