BIG [Bigwinner] Token

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

Parameter BigwinnerToken.calculateLiquidityFee(uint256)._amount (#524) is not in mixedCase
Parameter BigwinnerToken.calculateBurnFee(uint256)._amount (#530) is not in mixedCase
Variable BigwinnerToken._liquidityFee (#294) is not in mixedCase
Variable BigwinnerToken._burnFee (#297) is not in mixedCase
Variable BigwinnerToken._maxTxAmount (#305) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#136)" inContext (#130-139)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Reentrancy in BigwinnerToken._transfer(address,address,uint256) (#563-587):
External calls:
- swapAndLiquify(contractTokenBalance) (#576)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,holder,block.timestamp) (#601-607)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#586)
- _rOwned[sender] = _rOwned[sender].sub(param.rAmount) (#657)
- _rOwned[sender] = _rOwned[sender].sub(param.rAmount) (#646)
- _rOwned[recipient] = _rOwned[recipient].add(param.rTransferAmount) (#647)
- _rOwned[sender] = _rOwned[sender].sub(param.rAmount) (#633)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#506)
- _rOwned[sender] = _rOwned[sender].sub(param.rAmount) (#670)
- _rOwned[recipient] = _rOwned[recipient].add(param.rTransferAmount) (#671)
- _rOwned[recipient] = _rOwned[recipient].add(param.rTransferAmount) (#659)
- _rOwned[recipient] = _rOwned[recipient].add(param.rTransferAmount) (#635)
- _rOwned[address(0)] = _rOwned[address(0)].add(rBurn) (#512)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#632)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#669)
- _tOwned[recipient] = _tOwned[recipient].add(param.tTransferAmount) (#658)
- _tOwned[recipient] = _tOwned[recipient].add(param.tTransferAmount) (#634)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#508)
- _tOwned[address(0)] = _tOwned[address(0)].add(tBurn) (#514)
Apply the check-effects-interactions pattern.

Additional information: link

BigwinnerToken.allowance(address,address).owner (#363) shadows:
- Ownable.owner() (#213-215) (function)
BigwinnerToken._approve(address,address,uint256).owner (#555) shadows:
- Ownable.owner() (#213-215) (function)
Rename the local variables that shadow another component.

Additional information: link

BigwinnerToken.setLiquidityFeePercent(uint256) (#445-447) should emit an event for:
- _liquidityFee = liquidityFee (#446)
BigwinnerToken.setBurnFeePercent(uint256) (#449-451) should emit an event for:
- _burnFee = burnFee (#450)
BigwinnerToken.setMaxTxPercent(uint256) (#453-457) should emit an event for:
- _maxTxAmount = _tTotal.mul(maxTxPercent).div(10 ** 2) (#454-456)
Emit an event for critical parameter changes.

Additional information: link

BigwinnerToken.constructor(address,address,address)._wbnb (#317) lacks a zero-check on :
- wbnb = _wbnb (#323)
BigwinnerToken.constructor(address,address,address)._holder (#317) lacks a zero-check on :
- holder = _holder (#329)
BigwinnerToken.setPair(address).pair (#333) lacks a zero-check on :
- uniswapV2Pair = pair (#334)
Check that the address is not zero.

Additional information: link

Reentrancy in BigwinnerToken._transfer(address,address,uint256) (#563-587):
External calls:
- swapAndLiquify(contractTokenBalance) (#576)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,holder,block.timestamp) (#601-607)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#586)
- _burnFee = _previousBurnFee (#548)
- _burnFee = 0 (#543)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- _liquidityFee = _previousLiquidityFee (#547)
- _liquidityFee = 0 (#542)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- _previousBurnFee = _burnFee (#540)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- _previousLiquidityFee = _liquidityFee (#539)
Reentrancy in BigwinnerToken.transferFrom(address,address,uint256) (#372-376):
External calls:
- _transfer(sender,recipient,amount) (#373)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,holder,block.timestamp) (#601-607)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#374)
- _allowances[owner][spender] = amount (#559)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in BigwinnerToken._transfer(address,address,uint256) (#563-587):
External calls:
- swapAndLiquify(contractTokenBalance) (#576)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,holder,block.timestamp) (#601-607)
Event emitted after the call(s):
- Transfer(sender,address(this),param.tLiquidity) (#650)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,address(0),param.tBurn) (#651)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,address(this),param.tLiquidity) (#662)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,address(this),param.tLiquidity) (#674)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,address(this),param.tLiquidity) (#639)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,recipient,param.tTransferAmount) (#652)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,address(0),param.tBurn) (#675)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,address(0),param.tBurn) (#663)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,address(0),param.tBurn) (#640)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,recipient,param.tTransferAmount) (#676)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,recipient,param.tTransferAmount) (#664)
- _tokenTransfer(from,to,amount,takeFee) (#586)
- Transfer(sender,recipient,param.tTransferAmount) (#641)
- _tokenTransfer(from,to,amount,takeFee) (#586)
Reentrancy in BigwinnerToken.transferFrom(address,address,uint256) (#372-376):
External calls:
- _transfer(sender,recipient,amount) (#373)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,holder,block.timestamp) (#601-607)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#560)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#374)
Apply the check-effects-interactions pattern.

Additional information: link

Address.isContract(address) (#143-148) uses assembly
- INLINE ASM (#146)
Address._functionCallWithValue(address,bytes,uint256,string) (#178-199) uses assembly
- INLINE ASM (#191-194)
Do not use evm assembly.

Additional information: link

BigwinnerToken.includeInReward(address) (#423-434) has costly operations inside a loop:
- _excluded.pop() (#430)
Use a local variable to hold the loop computation result.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#178-199) is never used and should be removed
Address.functionCall(address,bytes) (#158-160) is never used and should be removed
Address.functionCall(address,bytes,string) (#163-165) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#168-170) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#173-176) is never used and should be removed
Address.isContract(address) (#143-148) is never used and should be removed
Address.sendValue(address,uint256) (#150-156) is never used and should be removed
BigwinnerToken._reflectFee(uint256,uint256) (#518-521) is never used and should be removed
Context._msgData() (#135-138) is never used and should be removed
SafeMath.mod(uint256,uint256) (#119-121) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#124-127) is never used and should be removed
TransferHelper.safeApprove(address,address,uint256) (#247-251) is never used and should be removed
TransferHelper.safeTransferFrom(address,address,address,uint256) (#259-263) is never used and should be removed
Remove unused functions.

Additional information: link

BigwinnerToken._rTotal (#287) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
BigwinnerToken._previousLiquidityFee (#295) is set pre-construction with a non-constant function or state variable:
- _liquidityFee
BigwinnerToken._previousBurnFee (#298) is set pre-construction with a non-constant function or state variable:
- _burnFee
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) (#150-156):
- (success) = recipient.call{value: amount}() (#154)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#178-199):
- (success,returndata) = target.call{value: weiValue}(data) (#182)
Low level call in TransferHelper.safeApprove(address,address,uint256) (#247-251):
- (success,data) = token.call(abi.encodeWithSelector(0x095ea7b3,to,value)) (#249)
Low level call in TransferHelper.safeTransfer(address,address,uint256) (#253-257):
- (success,data) = token.call(abi.encodeWithSelector(0xa9059cbb,to,value)) (#255)
Low level call in TransferHelper.safeTransferFrom(address,address,address,uint256) (#259-263):
- (success,data) = token.call(abi.encodeWithSelector(0x23b872dd,from,to,value)) (#261)
Low level call in TransferHelper.safeTransferETH(address,uint256) (#265-268):
- (success) = to.call{value: value}(new bytes(0)) (#266)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable BigwinnerToken._getValues(uint256).rTransferAmount (#479) is too similar to BigwinnerToken._getValues(uint256).tTransferAmount (#473)
Prevent variables from having similar names.

Additional information: link

BigwinnerToken.slitherConstructorVariables() (#271-690) uses literals with too many digits:
- _tTotal = 60000000 * 10 ** 9 (#286)
BigwinnerToken.slitherConstructorVariables() (#271-690) uses literals with too many digits:
- _maxTxAmount = 300000 * 10 ** 9 (#305)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

BigwinnerToken._decimals (#284) should be constant
BigwinnerToken._name (#290) should be constant
BigwinnerToken._symbol (#291) should be constant
BigwinnerToken._tTotal (#286) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#222-226)
name() should be declared external:
- BigwinnerToken.name() (#337-339)
symbol() should be declared external:
- BigwinnerToken.symbol() (#341-343)
decimals() should be declared external:
- BigwinnerToken.decimals() (#345-347)
totalSupply() should be declared external:
- BigwinnerToken.totalSupply() (#349-351)
transfer(address,uint256) should be declared external:
- BigwinnerToken.transfer(address,uint256) (#358-361)
allowance(address,address) should be declared external:
- BigwinnerToken.allowance(address,address) (#363-365)
approve(address,uint256) should be declared external:
- BigwinnerToken.approve(address,uint256) (#367-370)
transferFrom(address,address,uint256) should be declared external:
- BigwinnerToken.transferFrom(address,address,uint256) (#372-376)
increaseAllowance(address,uint256) should be declared external:
- BigwinnerToken.increaseAllowance(address,uint256) (#378-381)
decreaseAllowance(address,uint256) should be declared external:
- BigwinnerToken.decreaseAllowance(address,uint256) (#383-386)
isExcludedFromReward(address) should be declared external:
- BigwinnerToken.isExcludedFromReward(address) (#388-390)
totalFees() should be declared external:
- BigwinnerToken.totalFees() (#392-394)
reflectionFromToken(uint256,bool) should be declared external:
- BigwinnerToken.reflectionFromToken(uint256,bool) (#396-405)
excludeFromReward(address) should be declared external:
- BigwinnerToken.excludeFromReward(address) (#413-421)
excludeFromFee(address) should be declared external:
- BigwinnerToken.excludeFromFee(address) (#437-439)
includeInFee(address) should be declared external:
- BigwinnerToken.includeInFee(address) (#441-443)
isExcludedFromFee(address) should be declared external:
- BigwinnerToken.isExcludedFromFee(address) (#551-553)
Use the external attribute for functions never called from the contract.

Additional information: link

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

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 PancakeSwap trading pair to compute liquidity.

Unable to find PancakeSwap trading pair to compute volume.

Unable to find PancakeSwap trading pair to compute number of swaps.

Unable to crawl data from the website

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

Additional information: link

Unable to find token/project description on the website or on BscScan, CoinMarketCap

Unable to find token contract audit

Unable to verify token contract address on the website

Unable to find audit link on the website

Unable to find whitepaper link on the website

Unable to find Telegram link on the website

Unable to find Twitter link on the website

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

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

Token has relatively low CoinGecko rank

Token has relatively low CoinMarketCap rank