KYC [Kitten Yacht Club] Token

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

KYC.clearStuckBalance() (#639-641) sends eth to arbitrary user
Dangerous calls:
- address(feeaddress).transfer(address(this).balance) (#640)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

KYC.claimERCtoknes(IERC20) (#643-645) ignores return value by tokenAddress.transfer(feeaddress,tokenAddress.balanceOf(address(this))) (#644)
KYC.depositLPFee(uint256,address) (#853-865) ignores return value by IERC20(token).transferFrom(msg.sender,address(this),amount) (#861)
KYC.depositLPFee(uint256,address) (#853-865) ignores return value by IERC20(token).transfer(feeaddress,amount) (#862)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

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.

Not a direct threat, but may indicate unreliable intentions of developer. Widespread names (e.g. Elon, King, Moon, Doge) are common among meme-tokens and scams. The allow to gain free hype and attract unexperienced investors.

KYC.allowance(address,address).owner (#519) shadows:
- Ownable.owner() (#153-155) (function)
KYC._approve(address,address,uint256).owner (#759) shadows:
- Ownable.owner() (#153-155) (function)
Rename the local variables that shadow another component.

Additional information: link

KYC.constructor() (#472-491) ignores return value by IPYESwapPair(pyeSwapPair).updateTotalFee(1200) (#488)
KYC._updatePairsFee(uint256) (#611-615) ignores return value by IPYESwapPair(pairs[j]).updateTotalFee(fee) (#613)
KYC.addPair(address,address) (#875-880) ignores return value by IPYESwapPair(_pair).updateTotalFee(_totalTax) (#878)
Ensure that all the return values of the function calls are used.

Additional information: link

KYC._setmaxwalletamount(uint256) (#629-632) should emit an event for:
- _maxWallet = amount * 10 ** 9 (#631)
KYC.setmaxTxAmount(uint256) (#634-637) should emit an event for:
- _maxTxAmount = amount * 10 ** 9 (#636)
KYC.setFees(uint256,uint256) (#666-672) should emit an event for:
- _taxFee = _tax (#668)
- _developmentFee = _developmentTax (#669)
Emit an event for critical parameter changes.

Additional information: link

KYC.setfeeaddress(address).walletAddress (#625) lacks a zero-check on :
- feeaddress = walletAddress (#626)
KYC.EnableTrading(address)._address (#661) lacks a zero-check on :
- feeaddress = _address (#663)
Check that the address is not zero.

Additional information: link

Reentrancy in KYC.addPair(address,address) (#875-880):
External calls:
- IPYESwapPair(_pair).updateTotalFee(_totalTax) (#878)
State variables written after the call(s):
- tokens[pairsLength] = _token (#879)
Reentrancy in KYC.constructor() (#472-491):
External calls:
- pyeSwapPair = IPYESwapFactory(pyeSwapRouter.factory()).createPair(address(this),WBNB,true) (#477-478)
State variables written after the call(s):
- _isExcludedFromFee[owner()] = true (#485)
- _isExcludedFromFee[address(this)] = true (#486)
- depwallet = _msgSender() (#484)
- pairs[pairsLength] = pyeSwapPair (#481)
- pairsLength += 1 (#482)
- tokens[pairsLength] = WBNB (#480)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in KYC.constructor() (#472-491):
External calls:
- pyeSwapPair = IPYESwapFactory(pyeSwapRouter.factory()).createPair(address(this),WBNB,true) (#477-478)
- IPYESwapPair(pyeSwapPair).updateTotalFee(1200) (#488)
Event emitted after the call(s):
- Transfer(address(0),_msgSender(),_tTotal) (#490)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#184-189) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(block.timestamp > _lockTime,Contract is locked until 7 days) (#186)
Avoid relying on block.timestamp.

Additional information: link

Address.isContract(address) (#93-98) uses assembly
- INLINE ASM (#96)
Address._functionCallWithValue(address,bytes,uint256,string) (#123-139) uses assembly
- INLINE ASM (#131-134)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['>=0.5.0', '>=0.6.2', '^0.8.9']
- ^0.8.9 (#3)
- >=0.5.0 (#20)
- >=0.5.0 (#192)
- >=0.5.0 (#212)
- >=0.6.2 (#268)
- >=0.6.2 (#363)
Use one Solidity version.

Additional information: link

KYC.includeInReward(address) (#588-599) has costly operations inside a loop:
- _excluded.pop() (#595)
Use a local variable to hold the loop computation result.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#123-139) is never used and should be removed
Address.functionCall(address,bytes) (#106-108) is never used and should be removed
Address.functionCall(address,bytes,string) (#110-112) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#114-116) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#118-121) is never used and should be removed
Address.isContract(address) (#93-98) is never used and should be removed
Address.sendValue(address,uint256) (#99-104) is never used and should be removed
Context._msgData() (#85-88) is never used and should be removed
SafeMath.mod(uint256,uint256) (#70-72) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#74-77) is never used and should be removed
Remove unused functions.

Additional information: link

KYC._rTotal (#433) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
KYC._previousTaxFee (#442) is set pre-construction with a non-constant function or state variable:
- _taxFee
KYC._previousLiquidityFee (#445) is set pre-construction with a non-constant function or state variable:
- _liquidityFee
KYC._totalTax (#448) is set pre-construction with a non-constant function or state variable:
- (_taxFee * 100) + _developmentFee
KYC._maxTxAmount (#456) is set pre-construction with a non-constant function or state variable:
- _tTotal * 4 / 200
KYC._maxWallet (#457) is set pre-construction with a non-constant function or state variable:
- _tTotal * 4 / 200
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

Pragma version^0.8.9 (#3) necessitates a version too recent to be trusted. Consider deploying with 0.6.12/0.7.6/0.8.7
Pragma version>=0.5.0 (#20) allows old versions
Pragma version>=0.5.0 (#192) allows old versions
Pragma version>=0.5.0 (#212) allows old versions
Pragma version>=0.6.2 (#268) allows old versions
Pragma version>=0.6.2 (#363) allows old versions
solc-0.8.9 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

Low level call in Address.sendValue(address,uint256) (#99-104):
- (success) = recipient.call{value: amount}() (#102)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#123-139):
- (success,returndata) = target.call{value: weiValue}(data) (#126)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IPYESwapPair.DOMAIN_SEPARATOR() (#231) is not in mixedCase
Function IPYESwapPair.PERMIT_TYPEHASH() (#232) is not in mixedCase
Function IPYESwapPair.MINIMUM_LIQUIDITY() (#249) is not in mixedCase
Function IPYESwapRouter01.WETH() (#271) is not in mixedCase
Function KYC._setmaxwalletamount(uint256) (#629-632) is not in mixedCase
Function KYC.EnableTrading(address) (#661-664) is not in mixedCase
Parameter KYC.EnableTrading(address)._address (#661) is not in mixedCase
Parameter KYC.setFees(uint256,uint256)._tax (#666) is not in mixedCase
Parameter KYC.setFees(uint256,uint256)._developmentTax (#666) is not in mixedCase
Parameter KYC.calculateTaxFee(uint256)._amount (#728) is not in mixedCase
Parameter KYC.calculateLiquidityFee(uint256)._amount (#734) is not in mixedCase
Parameter KYC.addPair(address,address)._pair (#875) is not in mixedCase
Parameter KYC.addPair(address,address)._token (#875) is not in mixedCase
Variable KYC.WBNB (#419) is not in mixedCase
Variable KYC._totalTax (#448) is not in mixedCase
Variable KYC._maxTxAmount (#456) is not in mixedCase
Variable KYC._maxWallet (#457) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#86)" inContext (#80-89)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable IPYESwapRouter01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#276) is too similar to IPYESwapRouter01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#277)
Variable KYC._transferFromExcluded(address,address,uint256).rTransferAmount (#844) is too similar to KYC._transferBothExcluded(address,address,uint256).tTransferAmount (#601)
Variable KYC._transferFromExcluded(address,address,uint256).rTransferAmount (#844) is too similar to KYC._transferToExcluded(address,address,uint256).tTransferAmount (#834)
Variable KYC._transferToExcluded(address,address,uint256).rTransferAmount (#834) is too similar to KYC._transferBothExcluded(address,address,uint256).tTransferAmount (#601)
Variable KYC._transferToExcluded(address,address,uint256).rTransferAmount (#834) is too similar to KYC._transferToExcluded(address,address,uint256).tTransferAmount (#834)
Variable KYC._transferStandard(address,address,uint256).rTransferAmount (#825) is too similar to KYC._transferStandard(address,address,uint256).tTransferAmount (#825)
Variable KYC._transferBothExcluded(address,address,uint256).rTransferAmount (#601) is too similar to KYC._transferStandard(address,address,uint256).tTransferAmount (#825)
Variable KYC.reflectionFromToken(uint256,bool).rTransferAmount (#567) is too similar to KYC._transferBothExcluded(address,address,uint256).tTransferAmount (#601)
Variable KYC._getValues(uint256).rTransferAmount (#684) is too similar to KYC._getValues(uint256).tTransferAmount (#683)
Variable KYC._getValues(uint256).rTransferAmount (#684) is too similar to KYC._transferStandard(address,address,uint256).tTransferAmount (#825)
Variable KYC._transferFromExcluded(address,address,uint256).rTransferAmount (#844) is too similar to KYC._transferStandard(address,address,uint256).tTransferAmount (#825)
Variable KYC._transferToExcluded(address,address,uint256).rTransferAmount (#834) is too similar to KYC._transferStandard(address,address,uint256).tTransferAmount (#825)
Variable KYC._getValues(uint256).rTransferAmount (#684) is too similar to KYC._getTValues(uint256).tTransferAmount (#691)
Variable KYC._getValues(uint256).rTransferAmount (#684) is too similar to KYC._transferFromExcluded(address,address,uint256).tTransferAmount (#844)
Variable KYC._transferStandard(address,address,uint256).rTransferAmount (#825) is too similar to KYC._transferBothExcluded(address,address,uint256).tTransferAmount (#601)
Variable KYC._transferBothExcluded(address,address,uint256).rTransferAmount (#601) is too similar to KYC._transferBothExcluded(address,address,uint256).tTransferAmount (#601)
Variable KYC._transferFromExcluded(address,address,uint256).rTransferAmount (#844) is too similar to KYC._transferFromExcluded(address,address,uint256).tTransferAmount (#844)
Variable KYC._transferToExcluded(address,address,uint256).rTransferAmount (#834) is too similar to KYC._transferFromExcluded(address,address,uint256).tTransferAmount (#844)
Variable KYC.reflectionFromToken(uint256,bool).rTransferAmount (#567) is too similar to KYC._transferStandard(address,address,uint256).tTransferAmount (#825)
Variable KYC._getValues(uint256).rTransferAmount (#684) is too similar to KYC._transferToExcluded(address,address,uint256).tTransferAmount (#834)
Variable KYC._getValues(uint256).rTransferAmount (#684) is too similar to KYC._transferBothExcluded(address,address,uint256).tTransferAmount (#601)
Variable KYC._transferStandard(address,address,uint256).rTransferAmount (#825) is too similar to KYC._getValues(uint256).tTransferAmount (#683)
Variable KYC._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#699) is too similar to KYC._transferBothExcluded(address,address,uint256).tTransferAmount (#601)
Variable KYC.reflectionFromToken(uint256,bool).rTransferAmount (#567) is too similar to KYC._transferFromExcluded(address,address,uint256).tTransferAmount (#844)
Variable KYC._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#699) is too similar to KYC._transferFromExcluded(address,address,uint256).tTransferAmount (#844)
Variable KYC.reflectionFromToken(uint256,bool).rTransferAmount (#567) is too similar to KYC._getTValues(uint256).tTransferAmount (#691)
Variable KYC._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#699) is too similar to KYC._getTValues(uint256).tTransferAmount (#691)
Variable KYC._transferBothExcluded(address,address,uint256).rTransferAmount (#601) is too similar to KYC._getTValues(uint256).tTransferAmount (#691)
Variable KYC._transferBothExcluded(address,address,uint256).rTransferAmount (#601) is too similar to KYC._transferFromExcluded(address,address,uint256).tTransferAmount (#844)
Variable KYC._transferFromExcluded(address,address,uint256).rTransferAmount (#844) is too similar to KYC._getValues(uint256).tTransferAmount (#683)
Variable KYC._transferToExcluded(address,address,uint256).rTransferAmount (#834) is too similar to KYC._getTValues(uint256).tTransferAmount (#691)
Variable KYC.reflectionFromToken(uint256,bool).rTransferAmount (#567) is too similar to KYC._transferToExcluded(address,address,uint256).tTransferAmount (#834)
Variable KYC._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#699) is too similar to KYC._transferToExcluded(address,address,uint256).tTransferAmount (#834)
Variable KYC._transferBothExcluded(address,address,uint256).rTransferAmount (#601) is too similar to KYC._transferToExcluded(address,address,uint256).tTransferAmount (#834)
Variable KYC._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#699) is too similar to KYC._getValues(uint256).tTransferAmount (#683)
Variable KYC._transferBothExcluded(address,address,uint256).rTransferAmount (#601) is too similar to KYC._getValues(uint256).tTransferAmount (#683)
Variable KYC.reflectionFromToken(uint256,bool).rTransferAmount (#567) is too similar to KYC._getValues(uint256).tTransferAmount (#683)
Variable KYC._transferToExcluded(address,address,uint256).rTransferAmount (#834) is too similar to KYC._getValues(uint256).tTransferAmount (#683)
Variable KYC._transferStandard(address,address,uint256).rTransferAmount (#825) is too similar to KYC._transferFromExcluded(address,address,uint256).tTransferAmount (#844)
Variable KYC._transferStandard(address,address,uint256).rTransferAmount (#825) is too similar to KYC._getTValues(uint256).tTransferAmount (#691)
Variable KYC._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#699) is too similar to KYC._transferStandard(address,address,uint256).tTransferAmount (#825)
Variable KYC._transferStandard(address,address,uint256).rTransferAmount (#825) is too similar to KYC._transferToExcluded(address,address,uint256).tTransferAmount (#834)
Variable KYC._transferFromExcluded(address,address,uint256).rTransferAmount (#844) is too similar to KYC._getTValues(uint256).tTransferAmount (#691)
Prevent variables from having similar names.

Additional information: link

KYC.slitherConstructorVariables() (#408-883) uses literals with too many digits:
- _tTotal = 1000000000000 * 10 ** 9 (#432)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

KYC._decimals (#439) should be constant
KYC._name (#437) should be constant
KYC._symbol (#438) should be constant
KYC._tTotal (#432) should be constant
KYC.botscantrade (#427) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#162-165)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#167-171)
geUnlockTime() should be declared external:
- Ownable.geUnlockTime() (#173-175)
lock(uint256) should be declared external:
- Ownable.lock(uint256) (#177-182)
unlock() should be declared external:
- Ownable.unlock() (#184-189)
name() should be declared external:
- KYC.name() (#493-495)
symbol() should be declared external:
- KYC.symbol() (#497-499)
decimals() should be declared external:
- KYC.decimals() (#501-503)
totalSupply() should be declared external:
- KYC.totalSupply() (#505-507)
transfer(address,uint256) should be declared external:
- KYC.transfer(address,uint256) (#514-517)
allowance(address,address) should be declared external:
- KYC.allowance(address,address) (#519-521)
approve(address,uint256) should be declared external:
- KYC.approve(address,uint256) (#523-526)
transferFrom(address,address,uint256) should be declared external:
- KYC.transferFrom(address,address,uint256) (#528-532)
increaseAllowance(address,uint256) should be declared external:
- KYC.increaseAllowance(address,uint256) (#534-537)
decreaseAllowance(address,uint256) should be declared external:
- KYC.decreaseAllowance(address,uint256) (#539-542)
isExcludedFromReward(address) should be declared external:
- KYC.isExcludedFromReward(address) (#544-546)
totalFees() should be declared external:
- KYC.totalFees() (#548-550)
deliver(uint256) should be declared external:
- KYC.deliver(uint256) (#552-559)
reflectionFromToken(uint256,bool) should be declared external:
- KYC.reflectionFromToken(uint256,bool) (#561-570)
excludeFromReward(address) should be declared external:
- KYC.excludeFromReward(address) (#578-586)
excludeFromFee(address) should be declared external:
- KYC.excludeFromFee(address) (#617-619)
includeInFee(address) should be declared external:
- KYC.includeInFee(address) (#621-623)
setfeeaddress(address) should be declared external:
- KYC.setfeeaddress(address) (#625-627)
clearStuckBalance() should be declared external:
- KYC.clearStuckBalance() (#639-641)
getBotWalletStatus(address) should be declared external:
- KYC.getBotWalletStatus(address) (#657-659)
setFees(uint256,uint256) should be declared external:
- KYC.setFees(uint256,uint256) (#666-672)
isExcludedFromFee(address) should be declared external:
- KYC.isExcludedFromFee(address) (#755-757)
depositLPFee(uint256,address) should be declared external:
- KYC.depositLPFee(uint256,address) (#853-865)
addPair(address,address) should be declared external:
- KYC.addPair(address,address) (#875-880)
Use the external attribute for functions never called from the contract.

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