BYCO [BYCOIN] Token

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

Reentrancy in BYCOIN._transfer(address,address,uint256) (#1033-1061):
External calls:
- swapAndLiquify(contractTokenBalance) (#1056)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1095-1101)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1056)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
State variables written after the call(s):
- _tokenTransfer(from,to,amount) (#1060)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#977)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1153)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1147)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1148)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1168)
- _rOwned[sender] = _rOwned[sender].sub(vs.rAmount) (#1161)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1155)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1162)
- _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount) (#1170)
- _rOwned[charityWallet] = _rOwned[charityWallet].add(rCharity) (#915)
- _tokenTransfer(from,to,amount) (#1060)
- _rTotal = _rTotal.sub(rFee).sub(rBurn) (#910)
- _tokenTransfer(from,to,amount) (#1060)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1160)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1167)
- _tOwned[recipient] = _tOwned[recipient].add(vs.tTransferAmount) (#1154)
- _tOwned[recipient] = _tOwned[recipient].add(vs.tTransferAmount) (#1169)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#979)
- _tOwned[charityWallet] = _tOwned[charityWallet].add(tCharity) (#917)
- _tokenTransfer(from,to,amount) (#1060)
- _tTotal = _tTotal.sub(tBurn) (#912)
Apply the check-effects-interactions pattern.

Additional information: link

BYCOIN.allowance(address,address).owner (#819) shadows:
- Ownable.owner() (#414-416) (function)
BYCOIN._approve(address,address,uint256).owner (#1025) shadows:
- Ownable.owner() (#414-416) (function)
Rename the local variables that shadow another component.

Additional information: link

BYCOIN.setMaxTxPercent(uint256) (#1213-1218) should emit an event for:
- _maxTxAmount = _tTotal.mul(maxTxPercent).div(10 ** 2) (#1215-1217)
Emit an event for critical parameter changes.

Additional information: link

BYCOIN.setBoxerCharityWallet(address).newWallet (#1209) lacks a zero-check on :
- charityWallet = newWallet (#1210)
Check that the address is not zero.

Additional information: link

BYCOIN.addLiquidity(uint256,uint256) (#1104-1117) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
Ensure that all the return values of the function calls are used.

Additional information: link

Reentrancy in BYCOIN._transfer(address,address,uint256) (#1033-1061):
External calls:
- swapAndLiquify(contractTokenBalance) (#1056)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1095-1101)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1056)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
State variables written after the call(s):
- _tokenTransfer(from,to,amount) (#1060)
- _burnFee = 0 (#1009)
- _burnFee = 3 (#1017)
- _tokenTransfer(from,to,amount) (#1060)
- _charityFee = 2 (#1016)
- _charityFee = 0 (#1010)
- _tokenTransfer(from,to,amount) (#1060)
- _liquidityFee = 0 (#1008)
- _liquidityFee = 2 (#1015)
- _tokenTransfer(from,to,amount) (#1060)
- _tBurnTotal = _tBurnTotal.add(tBurn) (#913)
- _tokenTransfer(from,to,amount) (#1060)
- _tFeeTotal = _tFeeTotal.add(tFee) (#911)
- _tokenTransfer(from,to,amount) (#1060)
- _taxFee = 0 (#1007)
- _taxFee = 3 (#1014)
Reentrancy in BYCOIN.constructor() (#775-791):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#780-781)
State variables written after the call(s):
- _isExcludedFromFee[owner()] = true (#787)
- _isExcludedFromFee[address(this)] = true (#788)
- uniswapV2Router = _uniswapV2Router (#784)
Reentrancy in BYCOIN.swapAndLiquify(uint256) (#1063-1084):
External calls:
- swapTokensForEth(half) (#1075)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1095-1101)
- addLiquidity(otherHalf,newBalance) (#1081)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1081)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
State variables written after the call(s):
- addLiquidity(otherHalf,newBalance) (#1081)
- _allowances[owner][spender] = amount (#1029)
Reentrancy in BYCOIN.transferFrom(address,address,uint256) (#828-832):
External calls:
- _transfer(sender,recipient,amount) (#829)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1095-1101)
External calls sending eth:
- _transfer(sender,recipient,amount) (#829)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#830)
- _allowances[owner][spender] = amount (#1029)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in BYCOIN._transfer(address,address,uint256) (#1033-1061):
External calls:
- swapAndLiquify(contractTokenBalance) (#1056)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1095-1101)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1056)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
Event emitted after the call(s):
- Transfer(sender,recipient,vs.tTransferAmount) (#1149)
- _tokenTransfer(from,to,amount) (#1060)
- Transfer(sender,recipient,vs.tTransferAmount) (#1156)
- _tokenTransfer(from,to,amount) (#1060)
- Transfer(sender,recipient,vs.tTransferAmount) (#1163)
- _tokenTransfer(from,to,amount) (#1060)
- Transfer(sender,recipient,vs.tTransferAmount) (#1171)
- _tokenTransfer(from,to,amount) (#1060)
Reentrancy in BYCOIN.constructor() (#775-791):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#780-781)
Event emitted after the call(s):
- Transfer(address(0),_msgSender(),_tTotal) (#790)
Reentrancy in BYCOIN.swapAndLiquify(uint256) (#1063-1084):
External calls:
- swapTokensForEth(half) (#1075)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1095-1101)
- addLiquidity(otherHalf,newBalance) (#1081)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1081)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#1030)
- addLiquidity(otherHalf,newBalance) (#1081)
- SwapAndLiquify(half,newBalance,otherHalf) (#1083)
Reentrancy in BYCOIN.transferFrom(address,address,uint256) (#828-832):
External calls:
- _transfer(sender,recipient,amount) (#829)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1095-1101)
External calls sending eth:
- _transfer(sender,recipient,amount) (#829)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1109-1116)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#1030)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#830)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#461-466) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (#463)
Avoid relying on block.timestamp.

Additional information: link

Address.isContract(address) (#266-275) uses assembly
- INLINE ASM (#273)
Address._functionCallWithValue(address,bytes,uint256,string) (#359-380) uses assembly
- INLINE ASM (#372-375)
Do not use evm assembly.

Additional information: link

BYCOIN.includeInReward(address) (#893-904) has costly operations inside a loop:
- _excluded.pop() (#900)
Use a local variable to hold the loop computation result.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#359-380) is never used and should be removed
Address.functionCall(address,bytes) (#319-321) is never used and should be removed
Address.functionCall(address,bytes,string) (#329-331) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#344-346) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#354-357) is never used and should be removed
Address.isContract(address) (#266-275) is never used and should be removed
Address.sendValue(address,uint256) (#293-299) is never used and should be removed
Context._msgData() (#238-241) is never used and should be removed
SafeMath.mod(uint256,uint256) (#211-213) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#227-230) is never used and should be removed
Remove unused functions.

Additional information: link

BYCOIN._rTotal (#730) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
BYCOIN._previousTaxFee (#739) is set pre-construction with a non-constant function or state variable:
- _taxFee
BYCOIN._previousBurnFee (#742) is set pre-construction with a non-constant function or state variable:
- _burnFee
BYCOIN._previousCharityFee (#745) is set pre-construction with a non-constant function or state variable:
- _charityFee
BYCOIN._previousLiquidityFee (#748) 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.sendValue(address,uint256) (#293-299):
- (success) = recipient.call{value: amount}() (#297)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#359-380):
- (success,returndata) = target.call{value: weiValue}(data) (#363)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#505) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#506) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#523) is not in mixedCase
Function IUniswapV2Router01.WETH() (#545) is not in mixedCase
Parameter BYCOIN.calculateTaxFee(uint256)._amount (#982) is not in mixedCase
Parameter BYCOIN.calculateBurnFee(uint256)._amount (#988) is not in mixedCase
Parameter BYCOIN.calculateCharityFee(uint256)._amount (#994) is not in mixedCase
Parameter BYCOIN.calculateLiquidityFee(uint256)._amount (#1000) is not in mixedCase
Parameter BYCOIN.setSwapAndLiquifyEnabled(bool)._enabled (#1220) is not in mixedCase
Variable BYCOIN._taxFee (#738) is not in mixedCase
Variable BYCOIN._burnFee (#741) is not in mixedCase
Variable BYCOIN._charityFee (#744) is not in mixedCase
Variable BYCOIN._liquidityFee (#747) is not in mixedCase
Variable BYCOIN._maxTxAmount (#758) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#239)" inContext (#233-242)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#550) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#551)
Variable BYCOIN.reflectionFromToken(uint256,bool).rTransferAmount (#871) is too similar to BYCOIN._getTValues(uint256).tTransferAmount (#945)
Variable BYCOIN._getRValues(uint256,uint256,uint256,uint256,uint256,uint256).rTransferAmount (#955) is too similar to BYCOIN._getTValues(uint256).tTransferAmount (#945)
Prevent variables from having similar names.

Additional information: link

BYCOIN._decimals (#736) should be constant
BYCOIN._name (#734) should be constant
BYCOIN._symbol (#735) should be constant
BYCOIN.numTokensSellToAddToLiquidity (#759) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#433-436)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#442-446)
geUnlockTime() should be declared external:
- Ownable.geUnlockTime() (#448-450)
lock(uint256) should be declared external:
- Ownable.lock(uint256) (#453-458)
unlock() should be declared external:
- Ownable.unlock() (#461-466)
name() should be declared external:
- BYCOIN.name() (#793-795)
symbol() should be declared external:
- BYCOIN.symbol() (#797-799)
decimals() should be declared external:
- BYCOIN.decimals() (#801-803)
totalSupply() should be declared external:
- BYCOIN.totalSupply() (#805-807)
transfer(address,uint256) should be declared external:
- BYCOIN.transfer(address,uint256) (#814-817)
allowance(address,address) should be declared external:
- BYCOIN.allowance(address,address) (#819-821)
approve(address,uint256) should be declared external:
- BYCOIN.approve(address,uint256) (#823-826)
transferFrom(address,address,uint256) should be declared external:
- BYCOIN.transferFrom(address,address,uint256) (#828-832)
increaseAllowance(address,uint256) should be declared external:
- BYCOIN.increaseAllowance(address,uint256) (#834-837)
decreaseAllowance(address,uint256) should be declared external:
- BYCOIN.decreaseAllowance(address,uint256) (#839-842)
isExcludedFromReward(address) should be declared external:
- BYCOIN.isExcludedFromReward(address) (#844-846)
totalFees() should be declared external:
- BYCOIN.totalFees() (#848-850)
totalBurn() should be declared external:
- BYCOIN.totalBurn() (#852-854)
deliver(uint256) should be declared external:
- BYCOIN.deliver(uint256) (#856-863)
reflectionFromToken(uint256,bool) should be declared external:
- BYCOIN.reflectionFromToken(uint256,bool) (#865-874)
excludeFromReward(address) should be declared external:
- BYCOIN.excludeFromReward(address) (#882-891)
isExcludedFromFee(address) should be declared external:
- BYCOIN.isExcludedFromFee(address) (#1021-1023)
excludeFromFee(address) should be declared external:
- BYCOIN.excludeFromFee(address) (#1174-1176)
includeInFee(address) should be declared external:
- BYCOIN.includeInFee(address) (#1178-1180)
Use the external attribute for functions never called from the contract.

Additional information: link

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

Average 30d PancakeSwap volume 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.

Number of Binance Smart Chain (BSC) token holders is less than 100. Token is either dead or inactive. Ignore for presale.

Average PancakeSwap trading volume, liqudity, number of swaps are extremely low. Token seems to be dead.

Token is deployed only at one blockchain

Contract has 10% buy tax and 9% sell tax.
Taxes are low and contract ownership is renounced.

Token was delisted from CoinGecko

Additional information: link

Unable to find token contract audit

Unable to find audit link on the website

Token has no active CoinGecko listing / rank

Token has a considerable age, but social accounts / website are missing or have few users

Token has a considerable age, but average PancakeSwap 30d trading volume is low

Young tokens have high risks of price dump / death

Young tokens have high risks of price dump / death

Young tokens have high risks of price dump / death

Token has relatively low CoinMarketCap rank