TACO [Crypto Bell] Token

CryptoBell.addLiquidity(uint256,uint256) (#576-589) sends eth to arbitrary user
Dangerous calls:
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in CryptoBell._transfer(address,address,uint256) (#472-519):
External calls:
- swapAndLiquify(swapTokensAtAmount,sellTaxes) (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
- swapAndLiquify(swapTokensAtAmount,taxes) (#511)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
External calls sending eth:
- swapAndLiquify(swapTokensAtAmount,sellTaxes) (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- swapAndLiquify(swapTokensAtAmount,taxes) (#511)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee,isSell) (#518)
- _rOwned[address(this)] += rMarketing (#383)
- _rOwned[address(this)] += rLiquidity (#373)
- _rOwned[address(this)] += rDonation (#393)
- _rOwned[sender] = _rOwned[sender] - s.rAmount (#534)
- _rOwned[recipient] = _rOwned[recipient] + s.rTransferAmount (#535)
- _tokenTransfer(from,to,amount,takeFee,isSell) (#518)
- _rTotal -= rRfi (#362)
- _tokenTransfer(from,to,amount,takeFee,isSell) (#518)
- _tOwned[sender] = _tOwned[sender] - tAmount (#528)
- _tOwned[address(this)] += tDonation (#391)
- _tOwned[address(this)] += tMarketing (#381)
- _tOwned[address(this)] += tLiquidity (#371)
- _tOwned[recipient] = _tOwned[recipient] + s.tTransferAmount (#531)
Apply the check-effects-interactions pattern.

Additional information: link

CryptoBell.rescueAnyBEP20Tokens(address,address,uint256) (#680-682) ignores return value by IERC20(_tokenAddr).transfer(_to,_amount) (#681)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

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

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.

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.

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.

CryptoBell.swapAndLiquify(uint256,CryptoBell.Taxes) (#548-574) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - temp.liquidity) (#558)
-bnbToAddLiquidityWith = unitBalance * temp.liquidity (#559)
CryptoBell.swapAndLiquify(uint256,CryptoBell.Taxes) (#548-574) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - temp.liquidity) (#558)
-marketingAmt = unitBalance * 2 * temp.marketing (#566)
CryptoBell.swapAndLiquify(uint256,CryptoBell.Taxes) (#548-574) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - temp.liquidity) (#558)
-donationAmt = unitBalance * 2 * temp.donation (#570)
Consider ordering multiplication before division.

Additional information: link

CryptoBell.addLiquidity(uint256,uint256) (#576-589) ignores return value by router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
Ensure that all the return values of the function calls are used.

Additional information: link

CryptoBell.allowance(address,address).owner (#252) shadows:
- Ownable.owner() (#53-55) (function)
CryptoBell._approve(address,address,uint256).owner (#465) shadows:
- Ownable.owner() (#53-55) (function)
Rename the local variables that shadow another component.

Additional information: link

CryptoBell.updateCooldown(bool,uint256) (#631-634) should emit an event for:
- coolDownTime = time * 1 (#632)
CryptoBell.updateSwapTokensAtAmount(uint256) (#636-638) should emit an event for:
- swapTokensAtAmount = amount * 10 ** _decimals (#637)
CryptoBell.updateMaxTxLimit(uint256,uint256) (#659-662) should emit an event for:
- maxBuyLimit = maxBuy * 10 ** decimals() (#660)
- maxSellLimit = maxSell * 10 ** decimals() (#661)
CryptoBell.updateMaxWalletlimit(uint256) (#664-666) should emit an event for:
- maxWalletLimit = amount * 10 ** decimals() (#665)
Emit an event for critical parameter changes.

Additional information: link

CryptoBell.constructor(address)._pair (#208-209) lacks a zero-check on :
- pair = _pair (#212)
CryptoBell.updateMarketingWallet(address).newWallet (#622) lacks a zero-check on :
- marketingWallet = newWallet (#623)
CryptoBell.updateDonationWallet(address).newWallet (#626) lacks a zero-check on :
- donationWallet = newWallet (#627)
CryptoBell.updateRouterAndPair(address,address).newPair (#668) lacks a zero-check on :
- pair = newPair (#670)
Check that the address is not zero.

Additional information: link

Reentrancy in CryptoBell._transfer(address,address,uint256) (#472-519):
External calls:
- swapAndLiquify(swapTokensAtAmount,sellTaxes) (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
- swapAndLiquify(swapTokensAtAmount,taxes) (#511)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
External calls sending eth:
- swapAndLiquify(swapTokensAtAmount,sellTaxes) (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- swapAndLiquify(swapTokensAtAmount,taxes) (#511)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee,isSell) (#518)
- totFeesPaid.marketing += tMarketing (#377)
- totFeesPaid.liquidity += tLiquidity (#367)
- totFeesPaid.donation += tDonation (#387)
- totFeesPaid.rfi += tRfi (#363)
Reentrancy in CryptoBell.constructor(address) (#206-229):
External calls:
- _pair = IFactory(_router.factory()).createPair(address(this),_router.WETH()) (#208-209)
State variables written after the call(s):
- excludeFromReward(pair) (#214)
- _excluded.push(account) (#323)
- excludeFromReward(pair) (#214)
- _isExcluded[account] = true (#322)
- _isExcludedFromFee[address(this)] = true (#217)
- _isExcludedFromFee[owner()] = true (#218)
- _isExcludedFromFee[marketingWallet] = true (#219)
- _isExcludedFromFee[donationWallet] = true (#220)
- _rOwned[owner()] = _rTotal (#216)
- excludeFromReward(pair) (#214)
- _tOwned[account] = tokenFromReflection(_rOwned[account]) (#320)
- allowedTransfer[address(this)] = true (#222)
- allowedTransfer[owner()] = true (#223)
- allowedTransfer[pair] = true (#224)
- allowedTransfer[marketingWallet] = true (#225)
- allowedTransfer[donationWallet] = true (#226)
- pair = _pair (#212)
- router = _router (#211)
Reentrancy in CryptoBell.swapAndLiquify(uint256,CryptoBell.Taxes) (#548-574):
External calls:
- swapTokensForBNB(toSwap) (#555)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (#563)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
External calls sending eth:
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (#563)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
State variables written after the call(s):
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (#563)
- _allowances[owner][spender] = amount (#468)
Reentrancy in CryptoBell.transferFrom(address,address,uint256) (#261-269):
External calls:
- _transfer(sender,recipient,amount) (#262)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
External calls sending eth:
- _transfer(sender,recipient,amount) (#262)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
State variables written after the call(s):
- _approve(sender,_msgSender(),currentAllowance - amount) (#266)
- _allowances[owner][spender] = amount (#468)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in CryptoBell._transfer(address,address,uint256) (#472-519):
External calls:
- swapAndLiquify(swapTokensAtAmount,sellTaxes) (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
- swapAndLiquify(swapTokensAtAmount,taxes) (#511)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
External calls sending eth:
- swapAndLiquify(swapTokensAtAmount,sellTaxes) (#510)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- swapAndLiquify(swapTokensAtAmount,taxes) (#511)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
Event emitted after the call(s):
- Transfer(sender,address(this),s.tLiquidity + s.tMarketing + s.tDonation) (#540)
- _tokenTransfer(from,to,amount,takeFee,isSell) (#518)
- Transfer(sender,recipient,s.tTransferAmount) (#544)
- _tokenTransfer(from,to,amount,takeFee,isSell) (#518)
Reentrancy in CryptoBell.constructor(address) (#206-229):
External calls:
- _pair = IFactory(_router.factory()).createPair(address(this),_router.WETH()) (#208-209)
Event emitted after the call(s):
- Transfer(address(0),owner(),_tTotal) (#228)
Reentrancy in CryptoBell.swapAndLiquify(uint256,CryptoBell.Taxes) (#548-574):
External calls:
- swapTokensForBNB(toSwap) (#555)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (#563)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
External calls sending eth:
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (#563)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#469)
- addLiquidity(tokensToAddLiquidityWith,bnbToAddLiquidityWith) (#563)
Reentrancy in CryptoBell.transferFrom(address,address,uint256) (#261-269):
External calls:
- _transfer(sender,recipient,amount) (#262)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#600-606)
- address(marketingWallet).sendValue(marketingAmt) (#568)
- address(donationWallet).sendValue(donationAmt) (#572)
External calls sending eth:
- _transfer(sender,recipient,amount) (#262)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#581-588)
- (success) = recipient.call{value: amount}() (#106)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#469)
- _approve(sender,_msgSender(),currentAllowance - amount) (#266)
Apply the check-effects-interactions pattern.

Additional information: link

CryptoBell._transfer(address,address,uint256) (#472-519) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(timePassed >= coolDownTime,Cooldown enabled) (#499)
Avoid relying on block.timestamp.

Additional information: link

CryptoBell.setTradingStatus(bool) (#305-309) compares to a boolean constant:
-state == true && genesis_block == 0 (#308)
Remove the equality to the boolean constant.

Additional information: link

CryptoBell.includeInReward(address) (#326-337) has costly operations inside a loop:
- _excluded.pop() (#333)
CryptoBell._reflectRfi(uint256,uint256) (#361-364) has costly operations inside a loop:
- _rTotal -= rRfi (#362)
Use a local variable to hold the loop computation result.

Additional information: link

Context._msgData() (#38-41) is never used and should be removed
Remove unused functions.

Additional information: link

CryptoBell._rTotal (#148) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
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.sendValue(address,uint256) (#103-108):
- (success) = recipient.call{value: amount}() (#106)
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() (#84) is not in mixedCase
Struct CryptoBell.valuesFromGetValues (#183-195) is not in CapWords
Parameter CryptoBell.setTaxes(uint256,uint256,uint256,uint256)._rfi (#351) is not in mixedCase
Parameter CryptoBell.setTaxes(uint256,uint256,uint256,uint256)._marketing (#351) is not in mixedCase
Parameter CryptoBell.setTaxes(uint256,uint256,uint256,uint256)._liquidity (#351) is not in mixedCase
Parameter CryptoBell.setTaxes(uint256,uint256,uint256,uint256)._donation (#351) is not in mixedCase
Parameter CryptoBell.setSellTaxes(uint256,uint256,uint256,uint256)._rfi (#356) is not in mixedCase
Parameter CryptoBell.setSellTaxes(uint256,uint256,uint256,uint256)._marketing (#356) is not in mixedCase
Parameter CryptoBell.setSellTaxes(uint256,uint256,uint256,uint256)._liquidity (#356) is not in mixedCase
Parameter CryptoBell.setSellTaxes(uint256,uint256,uint256,uint256)._donation (#356) is not in mixedCase
Parameter CryptoBell.updateSwapEnabled(bool)._enabled (#640) is not in mixedCase
Parameter CryptoBell.rescueAnyBEP20Tokens(address,address,uint256)._tokenAddr (#680) is not in mixedCase
Parameter CryptoBell.rescueAnyBEP20Tokens(address,address,uint256)._to (#680) is not in mixedCase
Parameter CryptoBell.rescueAnyBEP20Tokens(address,address,uint256)._amount (#680) is not in mixedCase
Constant CryptoBell._decimals (#144) is not in UPPER_CASE_WITH_UNDERSCORES
Variable CryptoBell.genesis_block (#155) is not in mixedCase
Constant CryptoBell._name (#161) is not in UPPER_CASE_WITH_UNDERSCORES
Constant CryptoBell._symbol (#162) is not in UPPER_CASE_WITH_UNDERSCORES
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#39)" inContext (#33-42)
Remove redundant statements if they congest code but offer no value.

Additional information: link

CryptoBell._tTotal (#147) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#62-64)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#66-69)
name() should be declared external:
- CryptoBell.name() (#232-234)
symbol() should be declared external:
- CryptoBell.symbol() (#235-237)
totalSupply() should be declared external:
- CryptoBell.totalSupply() (#243-245)
allowance(address,address) should be declared external:
- CryptoBell.allowance(address,address) (#252-254)
approve(address,uint256) should be declared external:
- CryptoBell.approve(address,uint256) (#256-259)
transferFrom(address,address,uint256) should be declared external:
- CryptoBell.transferFrom(address,address,uint256) (#261-269)
increaseAllowance(address,uint256) should be declared external:
- CryptoBell.increaseAllowance(address,uint256) (#271-274)
decreaseAllowance(address,uint256) should be declared external:
- CryptoBell.decreaseAllowance(address,uint256) (#276-282)
transfer(address,uint256) should be declared external:
- CryptoBell.transfer(address,uint256) (#284-288)
isExcludedFromReward(address) should be declared external:
- CryptoBell.isExcludedFromReward(address) (#290-292)
reflectionFromToken(uint256,bool) should be declared external:
- CryptoBell.reflectionFromToken(uint256,bool) (#294-303)
excludeFromFee(address) should be declared external:
- CryptoBell.excludeFromFee(address) (#339-341)
includeInFee(address) should be declared external:
- CryptoBell.includeInFee(address) (#343-345)
isExcludedFromFee(address) should be declared external:
- CryptoBell.isExcludedFromFee(address) (#347-349)
setTaxes(uint256,uint256,uint256,uint256) should be declared external:
- CryptoBell.setTaxes(uint256,uint256,uint256,uint256) (#351-354)
setSellTaxes(uint256,uint256,uint256,uint256) should be declared external:
- CryptoBell.setSellTaxes(uint256,uint256,uint256,uint256) (#356-359)
rescueAnyBEP20Tokens(address,address,uint256) should be declared external:
- CryptoBell.rescueAnyBEP20Tokens(address,address,uint256) (#680-682)
Use the external attribute for functions never called from the contract.

Additional information: link

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

Additional information: link

Average 30d PancakeSwap liquidity is less than $100. Token is either dead or inactive.

Average 30d PancakeSwap volume is low.

Number of Binance Smart Chain (BSC) token holders is low.

Token is deployed only at one blockchain

Token has only one trading pair

Unable to find website, listings and other project-related information

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

Additional information: link

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

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank