BikeN Token Logo

BKN [BikeN] Token

About BKN

Listings

Token 20 months
CoinMarketCap 20 months
white paper

BikeN is a Web3 bike-to-earn lifestyle app with Social-Fi and Game-Fi elements including metaverse integration focused on fitness.
BikeN is built on the Binance blockchain. It combines aspects of a play-to-earn game with a fitness app that expands on the category coined “move-to-earn”. People can exercise, earn, compete, and interact while they bike in indoor and outdoor modes.

Laser Scorebeta Last Audit: 2 October 2022

report
Token is either risky or in presale. For presale 30+ is a fine score.

Reentrancy in BikeN._transfer(address,address,uint256) (#644-684):
External calls:
- swapAndLiquify(contractTokenBalance) (#668)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#725-731)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#668)
- recipient.transfer(amount) (#609)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
State variables written after the call(s):
- _balances[sender] = _balances[sender].sub(amount,Insufficient Balance) (#671)
- _balances[recipient] = _balances[recipient].add(finalAmount) (#679)
- finalAmount = takeFee(sender,recipient,amount) (#673-674)
- _balances[address(this)] = _balances[address(this)].add(feeAmount) (#762)
Apply the check-effects-interactions pattern.

Additional information: link

BikeN.addLiquidity(uint256,uint256) (#736-749) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

BikeN.withdrawStuckTokens(address,uint256) (#596-598) ignores return value by IERC20(tokenAddress).transfer(msg.sender,amount) (#597)
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.


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.


Contract ownership is not renounced (belongs to a wallet)


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.

Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#116-132):
- (success,returndata) = target.call{value: weiValue}(data) (#119)
Low level call in Address.sendValue(address,uint256) (#91-97):
- (success) = recipient.call{value: amount}() (#95)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Redundant expression "this (#11)" inContext (#4-14)
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 (#243) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#244)
Prevent variables from having similar names.

Additional information: link

BikeN._name (#375) should be constant
BikeN._symbol (#376) should be constant
BikeN._decimals (#377) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

BikeN._approve(address,address,uint256).owner (#505) shadows:
- Ownable.owner() (#146-148) (function)
BikeN.allowance(address,address).owner (#482) shadows:
- Ownable.owner() (#146-148) (function)
Rename the local variables that shadow another component.

Additional information: link

BikeN.setSellTaxes(uint256,uint256,uint256) (#539-547) should emit an event for:
- _totalTaxIfSelling = _sellLiquidityFee.add(_sellMarketingFee).add(_sellTeamFee) (#544)
BikeN.setDistributionSettings(uint256,uint256,uint256) (#549-555) should emit an event for:
- _liquidityShare = newLiquidityShare (#550)
- _teamShare = newTeamShare (#552)
- _totalDistributionShares = _liquidityShare.add(_marketingShare).add(_teamShare) (#554)
BikeN.setBuyTaxes(uint256,uint256,uint256) (#529-537) should emit an event for:
- _totalTaxIfBuying = _buyLiquidityFee.add(_buyMarketingFee).add(_buyTeamFee) (#534)
BikeN.setWalletLimit(uint256) (#569-571) should emit an event for:
- _walletMax = newLimit (#570)
BikeN.setNumTokensBeforeSwap(uint256) (#573-575) should emit an event for:
- minimumTokensBeforeSwap = newLimit (#574)
BikeN.setMaxTxAmount(uint256) (#557-559) should emit an event for:
- _maxTxAmount = maxTxAmount (#558)
Emit an event for critical parameter changes.

Additional information: link

Reentrancy in BikeN.swapAndLiquify(uint256) (#693-714):
External calls:
- swapTokensForEth(tokensForSwap) (#697)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#725-731)
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
External calls sending eth:
- transferToAddressETH(marketingWalletAddress,amountBNBMarketing) (#707)
- recipient.transfer(amount) (#609)
- transferToAddressETH(teamWalletAddress,amountBNBTeam) (#710)
- recipient.transfer(amount) (#609)
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
State variables written after the call(s):
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
- _allowances[owner][spender] = amount (#509)
Reentrancy in BikeN.transferFrom(address,address,uint256) (#638-642):
External calls:
- _transfer(sender,recipient,amount) (#639)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#725-731)
External calls sending eth:
- _transfer(sender,recipient,amount) (#639)
- recipient.transfer(amount) (#609)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#640)
- _allowances[owner][spender] = amount (#509)
Reentrancy in BikeN.changeRouterVersion(address) (#612-628):
External calls:
- newPairAddress = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#619-620)
State variables written after the call(s):
- isMarketPair[address(uniswapPair)] = true (#627)
- isWalletLimitExempt[address(uniswapPair)] = true (#626)
- uniswapPair = newPairAddress (#623)
- uniswapV2Router = _uniswapV2Router (#624)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in BikeN.swapTokensForEth(uint256) (#716-734):
External calls:
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#725-731)
Event emitted after the call(s):
- SwapTokensForETH(tokenAmount,path) (#733)
Reentrancy in BikeN.swapAndLiquify(uint256) (#693-714):
External calls:
- swapTokensForEth(tokensForSwap) (#697)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#725-731)
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
External calls sending eth:
- transferToAddressETH(marketingWalletAddress,amountBNBMarketing) (#707)
- recipient.transfer(amount) (#609)
- transferToAddressETH(teamWalletAddress,amountBNBTeam) (#710)
- recipient.transfer(amount) (#609)
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#510)
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
Reentrancy in BikeN.transferFrom(address,address,uint256) (#638-642):
External calls:
- _transfer(sender,recipient,amount) (#639)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#725-731)
External calls sending eth:
- _transfer(sender,recipient,amount) (#639)
- recipient.transfer(amount) (#609)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#510)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#640)
Reentrancy in BikeN._transfer(address,address,uint256) (#644-684):
External calls:
- swapAndLiquify(contractTokenBalance) (#668)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#725-731)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#668)
- recipient.transfer(amount) (#609)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount) (#763)
- finalAmount = takeFee(sender,recipient,amount) (#673-674)
- Transfer(sender,recipient,finalAmount) (#681)
Apply the check-effects-interactions pattern.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#116-132) uses assembly
- INLINE ASM (#124-127)
Address.isContract(address) (#80-89) uses assembly
- INLINE ASM (#87)
Do not use evm assembly.

Additional information: link

Address.sendValue(address,uint256) (#91-97) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#107-109) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#73-76) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#111-114) is never used and should be removed
Context._msgData() (#10-13) is never used and should be removed
SafeMath.mod(uint256,uint256) (#69-71) is never used and should be removed
Address._functionCallWithValue(address,bytes,uint256,string) (#116-132) is never used and should be removed
Address.isContract(address) (#80-89) is never used and should be removed
Address.functionCall(address,bytes,string) (#103-105) is never used and should be removed
Address.functionCall(address,bytes) (#99-101) is never used and should be removed
Remove unused functions.

Additional information: link

BikeN._walletMax (#410) is set pre-construction with a non-constant function or state variable:
- 8000000000000 * 10 ** _decimals
BikeN._totalSupply (#408) is set pre-construction with a non-constant function or state variable:
- 8000000000000 * 10 ** _decimals
BikeN._maxTxAmount (#409) is set pre-construction with a non-constant function or state variable:
- 8000000000000 * 10 ** _decimals
BikeN.minimumTokensBeforeSwap (#411) is set pre-construction with a non-constant function or state variable:
- 100 * 10 ** _decimals
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

Variable BikeN._sellMarketingFee (#397) is not in mixedCase
Variable BikeN._totalTaxIfSelling (#405) is not in mixedCase
Variable BikeN._walletMax (#410) is not in mixedCase
Variable BikeN._balances (#383) is not in mixedCase
Variable BikeN._buyTeamFee (#394) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#203) is not in mixedCase
Variable BikeN._buyMarketingFee (#393) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#219) is not in mixedCase
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#202) is not in mixedCase
Variable BikeN._totalDistributionShares (#406) is not in mixedCase
Variable BikeN._marketingShare (#401) is not in mixedCase
Parameter BikeN.setSwapAndLiquifyEnabled(bool)._enabled (#587) is not in mixedCase
Variable BikeN._teamShare (#402) is not in mixedCase
Variable BikeN._sellTeamFee (#398) is not in mixedCase
Variable BikeN._buyLiquidityFee (#392) is not in mixedCase
Variable BikeN._liquidityShare (#400) is not in mixedCase
Variable BikeN._maxTxAmount (#409) is not in mixedCase
Function IUniswapV2Router01.WETH() (#238) is not in mixedCase
Variable BikeN._sellLiquidityFee (#396) is not in mixedCase
Variable BikeN._totalTaxIfBuying (#404) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Reentrancy in BikeN._transfer(address,address,uint256) (#644-684):
External calls:
- swapAndLiquify(contractTokenBalance) (#668)
- recipient.transfer(amount) (#609)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#668)
- recipient.transfer(amount) (#609)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
State variables written after the call(s):
- _balances[sender] = _balances[sender].sub(amount,Insufficient Balance) (#671)
- _balances[recipient] = _balances[recipient].add(finalAmount) (#679)
- finalAmount = takeFee(sender,recipient,amount) (#673-674)
- _balances[address(this)] = _balances[address(this)].add(feeAmount) (#762)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount) (#763)
- finalAmount = takeFee(sender,recipient,amount) (#673-674)
- Transfer(sender,recipient,finalAmount) (#681)
Reentrancy in BikeN.swapAndLiquify(uint256) (#693-714):
External calls:
- transferToAddressETH(marketingWalletAddress,amountBNBMarketing) (#707)
- recipient.transfer(amount) (#609)
- transferToAddressETH(teamWalletAddress,amountBNBTeam) (#710)
- recipient.transfer(amount) (#609)
External calls sending eth:
- transferToAddressETH(marketingWalletAddress,amountBNBMarketing) (#707)
- recipient.transfer(amount) (#609)
- transferToAddressETH(teamWalletAddress,amountBNBTeam) (#710)
- recipient.transfer(amount) (#609)
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
State variables written after the call(s):
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
- _allowances[owner][spender] = amount (#509)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#510)
- addLiquidity(tokensForLP,amountBNBLiquidity) (#713)
Reentrancy in BikeN.transferFrom(address,address,uint256) (#638-642):
External calls:
- _transfer(sender,recipient,amount) (#639)
- recipient.transfer(amount) (#609)
External calls sending eth:
- _transfer(sender,recipient,amount) (#639)
- recipient.transfer(amount) (#609)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#640)
- _allowances[owner][spender] = amount (#509)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#510)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#640)
Apply the check-effects-interactions pattern.

Additional information: link

BikeN.slitherConstructorVariables() (#371-769) uses literals with too many digits:
- _walletMax = 8000000000000 * 10 ** _decimals (#410)
Ownable.waiveOwnership() (#155-158) uses literals with too many digits:
- _owner = address(0x000000000000000000000000000000000000dEaD) (#157)
Ownable.waiveOwnership() (#155-158) uses literals with too many digits:
- OwnershipTransferred(_owner,address(0x000000000000000000000000000000000000dEaD)) (#156)
BikeN.slitherConstructorVariables() (#371-769) uses literals with too many digits:
- _maxTxAmount = 8000000000000 * 10 ** _decimals (#409)
BikeN.slitherConstructorVariables() (#371-769) uses literals with too many digits:
- deadAddress = 0x000000000000000000000000000000000000dEaD (#381)
BikeN.slitherConstructorVariables() (#371-769) uses literals with too many digits:
- _totalSupply = 8000000000000 * 10 ** _decimals (#408)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

setIsExcludedFromFee(address,bool) should be declared external:
- BikeN.setIsExcludedFromFee(address,bool) (#521-523)
transfer(address,uint256) should be declared external:
- BikeN.transfer(address,uint256) (#633-636)
symbol() should be declared external:
- BikeN.symbol() (#466-468)
allowance(address,address) should be declared external:
- BikeN.allowance(address,address) (#482-484)
waiveOwnership() should be declared external:
- Ownable.waiveOwnership() (#155-158)
transferFrom(address,address,uint256) should be declared external:
- BikeN.transferFrom(address,address,uint256) (#638-642)
changeRouterVersion(address) should be declared external:
- BikeN.changeRouterVersion(address) (#612-628)
totalSupply() should be declared external:
- BikeN.totalSupply() (#474-476)
getCirculatingSupply() should be declared external:
- BikeN.getCirculatingSupply() (#604-606)
decimals() should be declared external:
- BikeN.decimals() (#470-472)
setSwapAndLiquifyByLimitOnly(bool) should be declared external:
- BikeN.setSwapAndLiquifyByLimitOnly(bool) (#592-594)
decreaseAllowance(address,uint256) should be declared external:
- BikeN.decreaseAllowance(address,uint256) (#491-494)
getTime() should be declared external:
- Ownable.getTime() (#166-168)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#160-164)
approve(address,uint256) should be declared external:
- BikeN.approve(address,uint256) (#500-503)
name() should be declared external:
- BikeN.name() (#462-464)
setMarketPairStatus(address,bool) should be declared external:
- BikeN.setMarketPairStatus(address,bool) (#513-515)
minimumTokensBeforeSwapAmount() should be declared external:
- BikeN.minimumTokensBeforeSwapAmount() (#496-498)
setIsTxLimitExempt(address,bool) should be declared external:
- BikeN.setIsTxLimitExempt(address,bool) (#517-519)
increaseAllowance(address,uint256) should be declared external:
- BikeN.increaseAllowance(address,uint256) (#486-489)
setSwapAndLiquifyEnabled(bool) should be declared external:
- BikeN.setSwapAndLiquifyEnabled(bool) (#587-590)
setBotStatus(address,bool) should be declared external:
- BikeN.setBotStatus(address,bool) (#525-527)
Use the external attribute for functions never called from the contract.

Additional information: link

BikeN.addLiquidity(uint256,uint256) (#736-749) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#741-748)
Ensure that all the return values of the function calls are used.

Additional information: link

Holders:

Contract has 9% buy tax and 9% sell tax.
Taxes are low but contract ownership is not renounced. Token has a high risk of becoming a honeypot.


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


Token is deployed only at one blockchain


Token has only one trading pair


Average 30d PancakeSwap volume is low.


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


Last post in Twitter was more than 30 days ago


Unable to find Discord account


BscScan page for the token does not contain additional info: website, socials, description, etc.

Additional information: link


Unable to find token on CoinGecko

Additional information: link


Token is not listed at Mobula.Finance

Additional information: link


Unable to find token on CoinHunt

Additional information: link


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


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


Token has no active CoinGecko listing / rank


Young tokens have high risks of price dump / death


Token has relatively low CoinMarketCap rank


Young tokens have high risks of price dump / death

Price for BKN

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