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STA [Star Alliance] Token

ALERT: rug pull scam

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Laser Scorebeta Last Audit: 15 February 2022

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

BA2Token.swapEthForToken(uint256,address) (#1066-1084) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.swapExactETHForTokens{value: ethAmount}(0,path,receiver,block.timestamp) (#1076-1081)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

BA2Token._transfer(address,address,uint256) (#831-871) uses a dangerous strict equality:
- shouldSetInviter = balanceOf(to) == 0 && inviter[to] == address(0) && from != uniswapV2Pair (#850-852)
BA2Token.setShare(address) (#910-919) uses a dangerous strict equality:
- IERC20(uniswapV2Pair).balanceOf(shareholder) == 0 (#912)
BA2Token.setShare(address) (#910-919) uses a dangerous strict equality:
- IERC20(uniswapV2Pair).balanceOf(shareholder) == 0 (#915)
Don't use strict equality to determine if an account has enough Ether or tokens.

Additional information: link

Ownable._previousOwner (#93) is never used in BA2Token (#588-1138)
Ownable._lockTime (#94) is never used in BA2Token (#588-1138)
Remove unused state variables.

Additional information: link

BA2Token._takeInviterFee(address,address,uint256) (#974-1013) performs a multiplication on the result of a division:
-_tOwned[address(this)] = _tOwned[address(this)].add(tAmount.div(10000).mul(_inviterFee)) (#986)
BA2Token._takeInviterFee(address,address,uint256) (#974-1013) performs a multiplication on the result of a division:
-Transfer(sender,address(this),tAmount.div(10000).mul(_inviterFee)) (#987)
BA2Token._takeInviterFee(address,address,uint256) (#974-1013) performs a multiplication on the result of a division:
-_tOwned[address(this)] = _tOwned[address(this)].add(tAmount.div(10000).mul(_inviterFee.sub(accurRate))) (#1011)
BA2Token._takeInviterFee(address,address,uint256) (#974-1013) performs a multiplication on the result of a division:
-Transfer(sender,address(this),tAmount.div(10000).mul(_inviterFee.sub(accurRate))) (#1012)
BA2Token._takeInviterFee(address,address,uint256) (#974-1013) performs a multiplication on the result of a division:
-curTAmount = tAmount.div(10000).mul(rate) (#1007)
BA2Token._transferStandard(address,address,uint256) (#1108-1136) performs a multiplication on the result of a division:
-_takeburnAndMarketFee(sender,tAmount.div(10000).mul(_burnAndMarketFee)) (#1116)
BA2Token._transferStandard(address,address,uint256) (#1108-1136) performs a multiplication on the result of a division:
-_takeLPFee(sender,tAmount.div(10000).mul(_LPFee.add(_satFee))) (#1119)
BA2Token._transferStandard(address,address,uint256) (#1108-1136) performs a multiplication on the result of a division:
-_takesatFee(sender,recipient,tAmount.div(10000).mul(_satFee)) (#1125)
BA2Token._transferStandard(address,address,uint256) (#1108-1136) performs a multiplication on the result of a division:
-_tOwned[recipient] = _tOwned[recipient].add(tAmount.div(10000).mul(recipientRate)) (#1132-1134)
BA2Token._transferStandard(address,address,uint256) (#1108-1136) performs a multiplication on the result of a division:
-Transfer(sender,recipient,tAmount.div(10000).mul(recipientRate)) (#1135)
Consider ordering multiplication before division.

Additional information: link

Reentrancy in BA2Token._tokenTransfer(address,address,uint256,bool) (#934-945):
External calls:
- _transferStandard(sender,recipient,amount) (#942)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
State variables written after the call(s):
- restoreAllFee() (#944)
- _LPFee = _previousLPFee (#814)
- restoreAllFee() (#944)
- _burnAndMarketFee = _previousburnAndMarketFee (#813)
- restoreAllFee() (#944)
- _inviterFee = _previousInviterFee (#815)
- restoreAllFee() (#944)
- _satFee = _previousatFee (#816)
Reentrancy in BA2Token._transfer(address,address,uint256) (#831-871):
External calls:
- _tokenTransfer(from,to,amount,takeFee) (#855)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
State variables written after the call(s):
- process(distributorGas) (#868)
- _tOwned[address(this)] = _tOwned[address(this)].sub(amount) (#906)
- _tOwned[shareholder] = _tOwned[shareholder].add(amount) (#907)
- inviter[to] = from (#858)
Reentrancy in BA2Token._transferStandard(address,address,uint256) (#1108-1136):
External calls:
- _takesatFee(sender,recipient,tAmount.div(10000).mul(_satFee)) (#1125)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
State variables written after the call(s):
- _tOwned[recipient] = _tOwned[recipient].add(tAmount.div(10000).mul(recipientRate)) (#1132-1134)
Apply the check-effects-interactions pattern.

Additional information: link

BA2Token.swapTokensForEth(uint256) (#1046-1064) ignores return value by uniswapV2Router.swapExactTokensForETH(tokenAmount,0,path,address(this),block.timestamp) (#1055-1061)
BA2Token.swapEthForToken(uint256,address) (#1066-1084) ignores return value by uniswapV2Router.swapExactETHForTokens{value: ethAmount}(0,path,receiver,block.timestamp) (#1076-1081)
BA2Token.swapThisTokenForToken(uint256,address) (#1086-1106) ignores return value by uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
Ensure that all the return values of the function calls are used.

Additional information: link

BA2Token.allowance(address,address).owner (#707) shadows:
- Ownable.owner() (#104-106) (function)
BA2Token._approve(address,address,uint256).owner (#820) shadows:
- Ownable.owner() (#104-106) (function)
Rename the local variables that shadow another component.

Additional information: link

Reentrancy in BA2Token._transfer(address,address,uint256) (#831-871):
External calls:
- _tokenTransfer(from,to,amount,takeFee) (#855)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
State variables written after the call(s):
- LPFeefenhong = block.timestamp (#869)
- setShare(fromAddress) (#862)
- _updated[shareholder] = false (#926)
- _updated[shareholder] = true (#917)
- setShare(toAddress) (#863)
- _updated[shareholder] = false (#926)
- _updated[shareholder] = true (#917)
- process(distributorGas) (#868)
- currentIndex = 0 (#884)
- currentIndex ++ (#889)
- currentIndex ++ (#898)
- fromAddress = from (#860)
- fromAddress = from (#865)
- setShare(fromAddress) (#862)
- shareholderIndexes[shareholder] = shareholders.length (#921)
- shareholderIndexes[shareholders[shareholders.length - 1]] = shareholderIndexes[shareholder] (#930)
- setShare(toAddress) (#863)
- shareholderIndexes[shareholder] = shareholders.length (#921)
- shareholderIndexes[shareholders[shareholders.length - 1]] = shareholderIndexes[shareholder] (#930)
- setShare(fromAddress) (#862)
- shareholders[shareholderIndexes[shareholder]] = shareholders[shareholders.length - 1] (#929)
- shareholders.push(shareholder) (#922)
- shareholders.pop() (#931)
- setShare(toAddress) (#863)
- shareholders[shareholderIndexes[shareholder]] = shareholders[shareholders.length - 1] (#929)
- shareholders.push(shareholder) (#922)
- shareholders.pop() (#931)
- toAddress = to (#861)
- toAddress = to (#866)
Reentrancy in BA2Token.constructor(string,string,address) (#648-676):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#659-660)
State variables written after the call(s):
- _isExcludedFromFee[msg.sender] = true (#666)
- _isExcludedFromFee[address(this)] = true (#667)
- isDividendExempt[address(this)] = true (#668)
- isDividendExempt[address(0)] = true (#669)
- uniswapV2Router = _uniswapV2Router (#663)
Reentrancy in BA2Token.transferFrom(address,address,uint256) (#732-747):
External calls:
- _transfer(sender,recipient,amount) (#737)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
State variables written after the call(s):
- _approve(sender,msg.sender,_allowances[sender][msg.sender].sub(amount,ERC20: transfer amount exceeds allowance)) (#738-745)
- _allowances[owner][spender] = amount (#827)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in BA2Token._transfer(address,address,uint256) (#831-871):
External calls:
- _tokenTransfer(from,to,amount,takeFee) (#855)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
Event emitted after the call(s):
- Transfer(address(this),shareholder,amount) (#908)
- process(distributorGas) (#868)
Reentrancy in BA2Token._transferStandard(address,address,uint256) (#1108-1136):
External calls:
- _takesatFee(sender,recipient,tAmount.div(10000).mul(_satFee)) (#1125)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
Event emitted after the call(s):
- Transfer(sender,recipient,tAmount.div(10000).mul(recipientRate)) (#1135)
Reentrancy in BA2Token.constructor(string,string,address) (#648-676):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#659-660)
Event emitted after the call(s):
- Transfer(address(0),msg.sender,_tTotal) (#675)
Reentrancy in BA2Token.transferFrom(address,address,uint256) (#732-747):
External calls:
- _transfer(sender,recipient,amount) (#737)
- uniswapV2Router.swapExactTokensForTokens(thisTokenAmount,0,path,receiver,block.timestamp) (#1097-1103)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#828)
- _approve(sender,msg.sender,_allowances[sender][msg.sender].sub(amount,ERC20: transfer amount exceeds allowance)) (#738-745)
Apply the check-effects-interactions pattern.

Additional information: link

BA2Token._transfer(address,address,uint256) (#831-871) uses timestamp for comparisons
Dangerous comparisons:
- _tOwned[address(this)] >= 1 * 10 ** 4 * 10 ** 18 && from != address(this) && LPFeefenhong.add(minPeriod) <= block.timestamp (#867)
Avoid relying on block.timestamp.

Additional information: link

BA2Token.swapEthForToken(uint256,address) (#1066-1084) is never used and should be removed
BA2Token.swapTokensForEth(uint256) (#1046-1064) is never used and should be removed
Remove unused functions.

Additional information: link

Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#306) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#308) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#339) is not in mixedCase
Function IUniswapV2Router01.WETH() (#385) is not in mixedCase
Constant BA2Token.MarketAddr (#598) is not in UPPER_CASE_WITH_UNDERSCORES
Variable BA2Token._burnAndMarketFee (#607) is not in mixedCase
Variable BA2Token._burnFee (#610) is not in mixedCase
Variable BA2Token._LPFee (#612) is not in mixedCase
Variable BA2Token._marketingFee (#615) is not in mixedCase
Variable BA2Token._satFee (#617) is not in mixedCase
Variable BA2Token._inviterFee (#620) is not in mixedCase
Variable BA2Token.LPFeefenhong (#626) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#390) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#391)
Prevent variables from having similar names.

Additional information: link

BA2Token.slitherConstructorVariables() (#588-1138) uses literals with too many digits:
- distributorGas = 500000 (#624)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

BA2Token._burnFee (#610) should be constant
BA2Token._decimals (#605) should be constant
BA2Token._marketingFee (#615) should be constant
BA2Token._tTotal (#623) should be constant
BA2Token.distributorGas (#624) should be constant
BA2Token.minPeriod (#625) should be constant
BA2Token.sat (#597) should be constant
Ownable._lockTime (#94) should be constant
Ownable._previousOwner (#93) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#113-116)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#118-122)
name() should be declared external:
- BA2Token.name() (#678-680)
symbol() should be declared external:
- BA2Token.symbol() (#682-684)
decimals() should be declared external:
- BA2Token.decimals() (#686-688)
totalSupply() should be declared external:
- BA2Token.totalSupply() (#690-692)
transfer(address,uint256) should be declared external:
- BA2Token.transfer(address,uint256) (#698-705)
allowance(address,address) should be declared external:
- BA2Token.allowance(address,address) (#707-714)
approve(address,uint256) should be declared external:
- BA2Token.approve(address,uint256) (#716-730)
transferFrom(address,address,uint256) should be declared external:
- BA2Token.transferFrom(address,address,uint256) (#732-747)
increaseAllowance(address,uint256) should be declared external:
- BA2Token.increaseAllowance(address,uint256) (#749-760)
decreaseAllowance(address,uint256) should be declared external:
- BA2Token.decreaseAllowance(address,uint256) (#762-776)
totalFees() should be declared external:
- BA2Token.totalFees() (#778-780)
isExcludedFromFee(address) should be declared external:
- BA2Token.isExcludedFromFee(address) (#782-784)
excludeFromFee(address) should be declared external:
- BA2Token.excludeFromFee(address) (#785-787)
includeInFee(address) should be declared external:
- BA2Token.includeInFee(address) (#789-791)
transferContracts() should be declared external:
- BA2Token.transferContracts() (#793-795)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


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.


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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

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