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Bandex [Banana Index] Token

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Banana Index is the Governance Token of Banana Task Force Ape. It empowers users to make critical decisions and proposals that can change BTFA's ecosystem.

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Laser Scorebeta Last Audit: 5 August 2022

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

BananaIndex.contractSwap(uint256) (#529-583) sends eth to arbitrary user
Dangerous calls:
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
- _taxWallets.marketing.transfer(marketingBalance) (#575)
- _taxWallets.dev.transfer(devBalance) (#578)
- _taxWallets.floorSupport.transfer(floorSupportBalance) (#581)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in BananaIndex._transfer(address,address,uint256) (#478-527):
External calls:
- contractSwap(contractTokenBalance) (#522)
- dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(swapAmt,0,path,address(this),block.timestamp) (#546-552)
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- antiSnipe.checkUser(from,to,amount) (#634-638)
External calls sending eth:
- contractSwap(contractTokenBalance) (#522)
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
- _taxWallets.marketing.transfer(marketingBalance) (#575)
- _taxWallets.dev.transfer(devBalance) (#578)
- _taxWallets.floorSupport.transfer(floorSupportBalance) (#581)
State variables written after the call(s):
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- _liquidityHolders[from] = true (#588)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- _tOwned[address(this)] += feeAmount (#665)
- _tOwned[from] -= amount (#645)
- _tOwned[to] += amountReceived (#647)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- contractSwapEnabled = true (#593)
Apply the check-effects-interactions pattern.

Additional information: link


Unable to verify that contract auditor is trusted: Certik, Quantstamp, Hacken, Solidity, Paladinsec, Openzeppelin, Verichains


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.

BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool).checked (#633) is a local variable never initialized
BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool).check (#634) is a local variable never initialized
Initialize all the variables. If a variable is meant to be initialized to zero, explicitly set it to zero to improve code readability.

Additional information: link

BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool) (#624-651) has external calls inside a loop: antiSnipe.checkUser(from,to,amount) (#634-638)
Favor pull over push strategy for external calls.

Additional information: link

Variable 'BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool).check (#634)' in BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool) (#624-651) potentially used before declaration: checked = check (#635)
Move all variable declarations prior to any usage of the variable, and ensure that reaching a variable declaration does not depend on some conditional if it is used unconditionally.

Additional information: link

renounceOwnership() should be declared external:
- BananaIndex.renounceOwnership() (#263-267)
transfer(address,uint256) should be declared external:
- BananaIndex.transfer(address,uint256) (#283-286)
approve(address,uint256) should be declared external:
- BananaIndex.approve(address,uint256) (#288-291)
approveContractContingency() should be declared external:
- BananaIndex.approveContractContingency() (#301-304)
setNewRouter(address) should be declared external:
- BananaIndex.setNewRouter(address) (#314-325)
isBlacklisted(address) should be declared external:
- BananaIndex.isBlacklisted(address) (#379-381)
getMaxTX() should be declared external:
- BananaIndex.getMaxTX() (#432-434)
getMaxWallet() should be declared external:
- BananaIndex.getMaxWallet() (#436-438)
enableTrading() should be declared external:
- BananaIndex.enableTrading() (#598-609)
Use the external attribute for functions never called from the contract.

Additional information: link

BananaIndex.contractSwap(uint256) (#529-583) performs a multiplication on the result of a division:
-toLiquify = ((contractTokenBalance * ratios.liquidity) / ratios.totalSwap) / 2 (#539)
-liquidityBalance = (amtBalance * toLiquify) / swapAmt (#555)
Consider ordering multiplication before division.

Additional information: link

Reentrancy in BananaIndex.enableTrading() (#598-609):
External calls:
- antiSnipe.setLaunch(lpPair,uint32(block.number),uint64(block.timestamp),_decimals) (#604)
State variables written after the call(s):
- tradingEnabled = true (#605)
Reentrancy in BananaIndex.transferOwner(address) (#248-261):
External calls:
- _finalizeTransfer(_owner,newOwner,balanceOf(_owner),false,false,false,true) (#255)
- antiSnipe.checkUser(from,to,amount) (#634-638)
State variables written after the call(s):
- _owner = newOwner (#258)
Apply the check-effects-interactions pattern.

Additional information: link

BananaIndex.contractSwap(uint256) (#529-583) ignores return value by dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool) (#624-651) ignores return value by antiSnipe.checkUser(from,to,amount) (#634-638)
Ensure that all the return values of the function calls are used.

Additional information: link

BananaIndex.setMaxTxPercent(uint256,uint256) (#422-425) should emit an event for:
- _maxTxAmount = (_tTotal * percent) / divisor (#424)
BananaIndex.setMaxWalletSize(uint256,uint256) (#427-430) should emit an event for:
- _maxWalletSize = (_tTotal * percent) / divisor (#429)
BananaIndex.setSwapSettings(uint256,uint256,uint256,uint256) (#440-443) should emit an event for:
- swapThreshold = (_tTotal * thresholdPercent) / thresholdDivisor (#441)
- swapAmount = (_tTotal * amountPercent) / amountDivisor (#442)
Emit an event for critical parameter changes.

Additional information: link

Reentrancy in BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool) (#624-651):
External calls:
- antiSnipe.checkUser(from,to,amount) (#634-638)
State variables written after the call(s):
- _tOwned[from] -= amount (#645)
- _tOwned[to] += amountReceived (#647)
- amountReceived = takeTaxes(from,buy,sell,amount) (#646)
- _tOwned[address(this)] += feeAmount (#665)
Reentrancy in BananaIndex.constructor() (#208-239):
External calls:
- lpPair = IFactoryV2(dexRouter.factory()).createPair(dexRouter.WETH(),address(this)) (#229)
State variables written after the call(s):
- _approve(_owner,address(dexRouter),type()(uint256).max) (#232)
- _allowances[sender][spender] = amount (#297)
- _approve(address(this),address(dexRouter),type()(uint256).max) (#233)
- _allowances[sender][spender] = amount (#297)
- _isExcludedFromFees[_owner] = true (#235)
- _isExcludedFromFees[address(this)] = true (#236)
- _isExcludedFromFees[DEAD] = true (#237)
- _liquidityHolders[_owner] = true (#238)
- lpPairs[lpPair] = true (#230)
Reentrancy in BananaIndex.enableTrading() (#598-609):
External calls:
- antiSnipe.setLaunch(lpPair,uint32(block.number),uint64(block.timestamp),_decimals) (#604)
State variables written after the call(s):
- allowedPresaleExclusion = false (#606)
- swapAmount = (balanceOf(lpPair) * 25) / 10000 (#608)
- swapThreshold = (balanceOf(lpPair) * 10) / 10000 (#607)
Reentrancy in BananaIndex.setNewRouter(address) (#314-325):
External calls:
- lpPair = IFactoryV2(_newRouter.factory()).createPair(address(this),_newRouter.WETH()) (#318)
State variables written after the call(s):
- _approve(address(this),address(dexRouter),type()(uint256).max) (#324)
- _allowances[sender][spender] = amount (#297)
- dexRouter = _newRouter (#323)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in BananaIndex._finalizeTransfer(address,address,uint256,bool,bool,bool,bool) (#624-651):
External calls:
- antiSnipe.checkUser(from,to,amount) (#634-638)
Event emitted after the call(s):
- Transfer(from,address(this),feeAmount) (#666)
- amountReceived = takeTaxes(from,buy,sell,amount) (#646)
- Transfer(from,to,amountReceived) (#649)
Reentrancy in BananaIndex._transfer(address,address,uint256) (#478-527):
External calls:
- contractSwap(contractTokenBalance) (#522)
- dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(swapAmt,0,path,address(this),block.timestamp) (#546-552)
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- antiSnipe.checkUser(from,to,amount) (#634-638)
External calls sending eth:
- contractSwap(contractTokenBalance) (#522)
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
- _taxWallets.marketing.transfer(marketingBalance) (#575)
- _taxWallets.dev.transfer(devBalance) (#578)
- _taxWallets.floorSupport.transfer(floorSupportBalance) (#581)
Event emitted after the call(s):
- ContractSwapEnabledUpdated(true) (#594)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- Transfer(from,address(this),feeAmount) (#666)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- Transfer(from,to,amountReceived) (#649)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
Reentrancy in BananaIndex.constructor() (#208-239):
External calls:
- lpPair = IFactoryV2(dexRouter.factory()).createPair(dexRouter.WETH(),address(this)) (#229)
Event emitted after the call(s):
- Approval(sender,spender,amount) (#298)
- _approve(address(this),address(dexRouter),type()(uint256).max) (#233)
- Approval(sender,spender,amount) (#298)
- _approve(_owner,address(dexRouter),type()(uint256).max) (#232)
Reentrancy in BananaIndex.contractSwap(uint256) (#529-583):
External calls:
- dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(swapAmt,0,path,address(this),block.timestamp) (#546-552)
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
External calls sending eth:
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
Event emitted after the call(s):
- AutoLiquify(liquidityBalance,toLiquify) (#566)
Reentrancy in BananaIndex.setNewRouter(address) (#314-325):
External calls:
- lpPair = IFactoryV2(_newRouter.factory()).createPair(address(this),_newRouter.WETH()) (#318)
Event emitted after the call(s):
- Approval(sender,spender,amount) (#298)
- _approve(address(this),address(dexRouter),type()(uint256).max) (#324)
Reentrancy in BananaIndex.transferOwner(address) (#248-261):
External calls:
- _finalizeTransfer(_owner,newOwner,balanceOf(_owner),false,false,false,true) (#255)
- antiSnipe.checkUser(from,to,amount) (#634-638)
Event emitted after the call(s):
- OwnershipTransferred(_owner,newOwner) (#259)
Apply the check-effects-interactions pattern.

Additional information: link

BananaIndex.setLpPair(address,bool) (#327-339) uses timestamp for comparisons
Dangerous comparisons:
- timeSinceLastPair != 0 (#332)
- require(bool,string)(block.timestamp - timeSinceLastPair > 259200,3 Day cooldown.!) (#333)
Avoid relying on block.timestamp.

Additional information: link

BananaIndex.setLpPair(address,bool) (#327-339) compares to a boolean constant:
-enabled == false (#328)
Remove the equality to the boolean constant.

Additional information: link

BananaIndex._checkLiquidityAdd(address,address) (#585-596) has costly operations inside a loop:
- _hasLiqBeenAdded = true (#589)
BananaIndex._checkLiquidityAdd(address,address) (#585-596) has costly operations inside a loop:
- antiSnipe = AntiSnipe(address(this)) (#591)
BananaIndex._checkLiquidityAdd(address,address) (#585-596) has costly operations inside a loop:
- contractSwapEnabled = true (#593)
Use a local variable to hold the loop computation result.

Additional information: link

Pragma version>=0.6.0<0.9.0 (#2) is too complex
solc-0.8.13 is not recommended for deployment
Deploy with any of the following Solidity versions: 0.5.16 - 0.5.17, 0.6.11 - 0.6.12, 0.7.5 - 0.7.6 Use a simple pragma version that allows any of these versions. Consider using the latest version of Solidity for testing.

Additional information: link

Function IRouter01.WETH() (#33) is not in mixedCase
Parameter BananaIndex.setProtectionSettings(bool,bool,bool,bool)._antiSnipe (#387) is not in mixedCase
Parameter BananaIndex.setProtectionSettings(bool,bool,bool,bool)._antiGas (#387) is not in mixedCase
Parameter BananaIndex.setProtectionSettings(bool,bool,bool,bool)._antiBlock (#387) is not in mixedCase
Parameter BananaIndex.setProtectionSettings(bool,bool,bool,bool)._algo (#387) is not in mixedCase
Constant BananaIndex.startingSupply (#124) is not in UPPER_CASE_WITH_UNDERSCORES
Constant BananaIndex._name (#126) is not in UPPER_CASE_WITH_UNDERSCORES
Constant BananaIndex._symbol (#127) is not in UPPER_CASE_WITH_UNDERSCORES
Constant BananaIndex._decimals (#128) is not in UPPER_CASE_WITH_UNDERSCORES
Constant BananaIndex._tTotal (#130) is not in UPPER_CASE_WITH_UNDERSCORES
Variable BananaIndex._taxRates (#146-150) is not in mixedCase
Variable BananaIndex._ratios (#152-158) is not in mixedCase
Constant BananaIndex.maxBuyTaxes (#160) is not in UPPER_CASE_WITH_UNDERSCORES
Constant BananaIndex.maxSellTaxes (#161) is not in UPPER_CASE_WITH_UNDERSCORES
Constant BananaIndex.maxTransferTaxes (#162) is not in UPPER_CASE_WITH_UNDERSCORES
Constant BananaIndex.masterTaxDivisor (#163) is not in UPPER_CASE_WITH_UNDERSCORES
Variable BananaIndex._taxWallets (#175-179) is not in mixedCase
Variable BananaIndex._hasLiqBeenAdded (#190) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Reentrancy in BananaIndex._transfer(address,address,uint256) (#478-527):
External calls:
- contractSwap(contractTokenBalance) (#522)
- _taxWallets.marketing.transfer(marketingBalance) (#575)
- _taxWallets.dev.transfer(devBalance) (#578)
- _taxWallets.floorSupport.transfer(floorSupportBalance) (#581)
External calls sending eth:
- contractSwap(contractTokenBalance) (#522)
- dexRouter.addLiquidityETH{value: liquidityBalance}(address(this),toLiquify,0,0,DEAD,block.timestamp) (#558-565)
- _taxWallets.marketing.transfer(marketingBalance) (#575)
- _taxWallets.dev.transfer(devBalance) (#578)
- _taxWallets.floorSupport.transfer(floorSupportBalance) (#581)
State variables written after the call(s):
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- _hasLiqBeenAdded = true (#589)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- _liquidityHolders[from] = true (#588)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- _tOwned[address(this)] += feeAmount (#665)
- _tOwned[from] -= amount (#645)
- _tOwned[to] += amountReceived (#647)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- antiSnipe = AntiSnipe(address(this)) (#591)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- contractSwapEnabled = true (#593)
Event emitted after the call(s):
- ContractSwapEnabledUpdated(true) (#594)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- Transfer(from,address(this),feeAmount) (#666)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
- Transfer(from,to,amountReceived) (#649)
- _finalizeTransfer(from,to,amount,takeFee,buy,sell,other) (#526)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IRouter01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#45) is too similar to IRouter01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#46)
Prevent variables from having similar names.

Additional information: link

BananaIndex.slitherConstructorConstantVariables() (#104-671) uses literals with too many digits:
- DEAD = 0x000000000000000000000000000000000000dEaD (#167)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

BananaIndex._rOwned (#108) is never used in BananaIndex (#104-671)
BananaIndex._isExcluded (#118) is never used in BananaIndex (#104-671)
BananaIndex._excluded (#119) is never used in BananaIndex (#104-671)
Remove unused state variables.

Additional information: link

Holders:

Contract has 15% buy tax and 15% sell tax.
Taxes are suspiciously high (over 10%) and contract ownership is not renounced. Token has a high risk of becoming a honeypot.


Average 30d number of PancakeSwap swaps is low.


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


Unable to find Blog account (Reddit or Medium)


Unable to find Youtube account


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

Additional information: link


Unable to find KYC or doxxing proof


Unable to find whitepaper link on the website


Unable to find token on CoinHunt

Additional information: link


Token is not listed at Mobula.Finance

Additional information: link


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


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

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