$Aeterna [Aeterna] Token

Aeterna.swapAndLiquify() (#804-844) sends eth to arbitrary user
Dangerous calls:
- (success,None) = address(aeternaDefenceAddress).call{gas: 30000,value: bnbForDefence}() (#839-842)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in Aeterna._transferFrom(address,address,uint256) (#734-781):
External calls:
- rebase() (#759)
- pairContract.sync() (#694)
- swapAndLiquify() (#763)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#861-868)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#851-857)
- (success,None) = address(aeternaTreasuryAddress).call{gas: 30000,value: bnbForTreasury}() (#832-835)
- (success,None) = address(aeternaDefenceAddress).call{gas: 30000,value: bnbForDefence}() (#839-842)
External calls sending eth:
- swapAndLiquify() (#763)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#861-868)
- (success,None) = address(aeternaTreasuryAddress).call{gas: 30000,value: bnbForTreasury}() (#832-835)
- (success,None) = address(aeternaDefenceAddress).call{gas: 30000,value: bnbForDefence}() (#839-842)
State variables written after the call(s):
- _gonBalances[sender] = _gonBalances[sender].sub(gonAmount) (#768)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonAmountReceived) (#771)
- gonAmountReceived = takeFee(sender,recipient,gonAmount) (#770)
- _gonBalances[address(this)] = _gonBalances[address(this)].add(feeAmount) (#797)
Apply the check-effects-interactions pattern.

Additional information: link

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.

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

Contract ownership is not renounced (belongs to a wallet)

Pragma version^0.7.4 (#2) allows old versions
solc-0.7.4 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

Aeterna.rebase() (#671-696) performs a multiplication on the result of a division:
-times = deltaTime.div(_rebaseFrequency) (#674)
-epoch = times.mul(_rebaseFrequency.div(60)) (#675)
Aeterna.rebase() (#671-696) performs a multiplication on the result of a division:
-times = deltaTime.div(_rebaseFrequency) (#674)
-_lastRebasedTime = _lastRebasedTime.add(times.mul(_rebaseFrequency)) (#685)
Aeterna.takeFee(address,address,uint256) (#783-802) performs a multiplication on the result of a division:
-feeAmount = gonAmount.div(feeDenominator).mul(_totalFee) (#794)
Aeterna.swapAndLiquify() (#804-844) performs a multiplication on the result of a division:
-tAmount = _gonBalances[address(this)].div(_gonsPerFragment) (#805)
-tokensForLP = tAmount.mul(liquidityFee).div(totalFee).div(2) (#814)
Consider ordering multiplication before division.

Additional information: link

Aeterna.setRewardYield(uint256,uint256,uint256) (#503-510) should emit an event for:
- _rewardYield = rewardYield (#507)
- _rewardYieldDenominator = rewardYieldDenominator (#508)
- _rebaseFrequency = rebaseFrequency (#509)
Aeterna.setTaxes(uint256,uint256,uint256,uint256) (#512-522) should emit an event for:
- liquidityFee = _liquidityFee (#517)
- aeternaTreasuryFee = _aeternaTreasuryFee (#518)
- aeternaDefenceFee = _aeternaDefenceFee (#519)
- sellFee = _sellFee (#520)
- totalFee = liquidityFee.add(aeternaTreasuryFee).add(aeternaDefenceFee) (#521)
Aeterna.setSwapBackSettings(uint256,bool,bool) (#555-562) should emit an event for:
- swapThreshold = _swapThreshold (#559)
Emit an event for critical parameter changes.

Additional information: link

Aeterna.setFeeReceivers(address,address)._aeternaTreasuryAddress (#524) lacks a zero-check on :
- aeternaTreasuryAddress = _aeternaTreasuryAddress (#525)
Aeterna.setFeeReceivers(address,address)._aeternaDefenceAddress (#524) lacks a zero-check on :
- aeternaDefenceAddress = _aeternaDefenceAddress (#526)
Aeterna.setPairAddress(address)._pairAddress (#577) lacks a zero-check on :
- pairAddress = _pairAddress (#578)
Check that the address is not zero.

Additional information: link

Reentrancy in Aeterna.constructor() (#468-492):
External calls:
- pairAddress = IPancakeSwapFactory(router.factory()).createPair(router.WETH(),address(this)) (#471)
State variables written after the call(s):
- _allowedFragments[address(this)][address(router)] = uint256(- 1) (#477)
- _gonBalances[owner()] = TOTAL_GONS (#480)
- _gonsPerFragment = TOTAL_GONS.div(_totalSupply) (#481)
- _isAuthorized[owner()] = true (#483)
- _isAuthorized[address(this)] = true (#484)
- _isFeeExempt[owner()] = true (#486)
- _isFeeExempt[aeternaTreasuryAddress] = true (#487)
- _isFeeExempt[aeternaDefenceAddress] = true (#488)
- _isFeeExempt[address(this)] = true (#489)
- _totalSupply = INITIAL_FRAGMENTS_SUPPLY (#479)
- aeternaDefenceAddress = 0x5758371fBB53Ff2aE32fD732F6c77C4fDf4cAdD1 (#475)
- aeternaTreasuryAddress = 0xBABA1bF542EB6462deaB6D4FFb1610D3914a22C8 (#474)
- pairContract = IPancakeSwapPair(pairAddress) (#472)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in Aeterna._transferFrom(address,address,uint256) (#734-781):
External calls:
- rebase() (#759)
- pairContract.sync() (#694)
- swapAndLiquify() (#763)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#861-868)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#851-857)
- (success,None) = address(aeternaTreasuryAddress).call{gas: 30000,value: bnbForTreasury}() (#832-835)
- (success,None) = address(aeternaDefenceAddress).call{gas: 30000,value: bnbForDefence}() (#839-842)
External calls sending eth:
- swapAndLiquify() (#763)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#861-868)
- (success,None) = address(aeternaTreasuryAddress).call{gas: 30000,value: bnbForTreasury}() (#832-835)
- (success,None) = address(aeternaDefenceAddress).call{gas: 30000,value: bnbForDefence}() (#839-842)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount.div(_gonsPerFragment)) (#798)
- gonAmountReceived = takeFee(sender,recipient,gonAmount) (#770)
- Transfer(sender,recipient,gonAmountReceived.div(_gonsPerFragment)) (#773-777)
Reentrancy in Aeterna.constructor() (#468-492):
External calls:
- pairAddress = IPancakeSwapFactory(router.factory()).createPair(router.WETH(),address(this)) (#471)
Event emitted after the call(s):
- Transfer(address(0x0),owner(),_totalSupply) (#491)
Reentrancy in Aeterna.rebase() (#671-696):
External calls:
- pairContract.sync() (#694)
Event emitted after the call(s):
- LogRebase(epoch,_totalSupply) (#695)
Apply the check-effects-interactions pattern.

Additional information: link

Aeterna.manualRebase() (#665-669) uses timestamp for comparisons
Dangerous comparisons:
- _launched && shouldRebase() (#666)
Aeterna.rebase() (#671-696) uses timestamp for comparisons
Dangerous comparisons:
- i < times (#678)
Aeterna._transferFrom(address,address,uint256) (#734-781) uses timestamp for comparisons
Dangerous comparisons:
- _autoRebase && shouldRebase() (#758)
Aeterna.shouldRebase() (#907-911) uses timestamp for comparisons
Dangerous comparisons:
- (_totalSupply < MAX_SUPPLY) && msg.sender != pairAddress && ! inSwap && block.timestamp >= (_lastRebasedTime + _rebaseFrequency) (#908-910)
Avoid relying on block.timestamp.

Additional information: link

SafeMath.mod(uint256,uint256) (#89-92) is never used and should be removed
SafeMathInt.abs(int256) (#34-37) is never used and should be removed
SafeMathInt.add(int256,int256) (#28-32) is never used and should be removed
SafeMathInt.div(int256,int256) (#16-20) is never used and should be removed
SafeMathInt.mul(int256,int256) (#8-14) is never used and should be removed
SafeMathInt.sub(int256,int256) (#22-26) is never used and should be removed
Remove unused functions.

Additional information: link

Aeterna.totalFee (#421) is set pre-construction with a non-constant function or state variable:
- liquidityFee.add(aeternaTreasuryFee).add(aeternaDefenceFee)
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 Aeterna.swapAndLiquify() (#804-844):
- (success,None) = address(aeternaTreasuryAddress).call{gas: 30000,value: bnbForTreasury}() (#832-835)
- (success,None) = address(aeternaDefenceAddress).call{gas: 30000,value: bnbForDefence}() (#839-842)
Low level call in Aeterna.withdrawAllToTreasury() (#871-893):
- (success,None) = address(aeternaTreasuryAddress).call{gas: 30000,value: bnbReceived}() (#888-891)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IPancakeSwapPair.DOMAIN_SEPARATOR() (#139) is not in mixedCase
Function IPancakeSwapPair.PERMIT_TYPEHASH() (#140) is not in mixedCase
Function IPancakeSwapPair.MINIMUM_LIQUIDITY() (#157) is not in mixedCase
Function IPancakeSwapRouter.WETH() (#177) is not in mixedCase
Parameter Aeterna.startLaunchSequence(uint256)._sellThreshold (#494) is not in mixedCase
Parameter Aeterna.setTaxes(uint256,uint256,uint256,uint256)._liquidityFee (#512) is not in mixedCase
Parameter Aeterna.setTaxes(uint256,uint256,uint256,uint256)._aeternaTreasuryFee (#513) is not in mixedCase
Parameter Aeterna.setTaxes(uint256,uint256,uint256,uint256)._aeternaDefenceFee (#514) is not in mixedCase
Parameter Aeterna.setTaxes(uint256,uint256,uint256,uint256)._sellFee (#515) is not in mixedCase
Parameter Aeterna.setFeeReceivers(address,address)._aeternaTreasuryAddress (#524) is not in mixedCase
Parameter Aeterna.setFeeReceivers(address,address)._aeternaDefenceAddress (#524) is not in mixedCase
Parameter Aeterna.setAutoRebase(bool)._flag (#529) is not in mixedCase
Parameter Aeterna.setRebasePairTokens(bool)._flag (#536) is not in mixedCase
Parameter Aeterna.setTransferFeeStatus(bool)._flag (#540) is not in mixedCase
Parameter Aeterna.setSellLimits(bool,uint256)._checkSellLimits (#544) is not in mixedCase
Parameter Aeterna.setSellLimits(bool,uint256)._sellThreshold (#545) is not in mixedCase
Parameter Aeterna.setSwapBackSettings(uint256,bool,bool)._swapThreshold (#555) is not in mixedCase
Parameter Aeterna.setSwapBackSettings(uint256,bool,bool)._swapAndLiquifyEnabled (#556) is not in mixedCase
Parameter Aeterna.setSwapBackSettings(uint256,bool,bool)._swapAndLiquifyByLimitOnly (#557) is not in mixedCase
Parameter Aeterna.setWhitelist(address,bool)._addr (#564) is not in mixedCase
Parameter Aeterna.setWhitelist(address,bool)._feeExempt (#564) is not in mixedCase
Parameter Aeterna.setAuthorized(address,bool)._addr (#568) is not in mixedCase
Parameter Aeterna.setBotBlacklist(address,bool)._botAddress (#572) is not in mixedCase
Parameter Aeterna.setBotBlacklist(address,bool)._flag (#572) is not in mixedCase
Parameter Aeterna.setPairAddress(address)._pairAddress (#577) is not in mixedCase
Variable Aeterna.DEAD (#399) is not in mixedCase
Variable Aeterna.ZERO (#400) is not in mixedCase
Variable Aeterna._rewardYield (#410) is not in mixedCase
Variable Aeterna._rewardYieldDenominator (#411) is not in mixedCase
Variable Aeterna._autoRebase (#427) is not in mixedCase
Variable Aeterna._rebasePairTokens (#428) is not in mixedCase
Variable Aeterna._collectFeeOnTransfer (#429) is not in mixedCase
Variable Aeterna._launched (#430) is not in mixedCase
Variable Aeterna._rebaseFrequency (#435) is not in mixedCase
Variable Aeterna._rebaseStartedTime (#436) is not in mixedCase
Variable Aeterna._lastRebasedTime (#437) is not in mixedCase
Variable Aeterna._totalSupply (#438) is not in mixedCase
Variable Aeterna._maxTxPercent (#439) is not in mixedCase
Variable Aeterna._isFeeExempt (#446) is not in mixedCase
Variable Aeterna._isAuthorized (#447) is not in mixedCase
Variable Aeterna._sellHistory (#451) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable IPancakeSwapRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#182) is too similar to IPancakeSwapRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#183)
Prevent variables from having similar names.

Additional information: link

waiveOwnership() should be declared external:
- Ownable.waiveOwnership() (#350-353)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#355-357)
name() should be declared external:
- ERC20Detailed.name() (#381-383)
symbol() should be declared external:
- ERC20Detailed.symbol() (#385-387)
decimals() should be declared external:
- ERC20Detailed.decimals() (#389-391)
setPairAddress(address) should be declared external:
- Aeterna.setPairAddress(address) (#577-580)
getCirculatingSupply() should be declared external:
- Aeterna.getCirculatingSupply() (#650-655)
Use the external attribute for functions never called from the contract.

Additional information: link

Contract ticker ($Aeterna) contains non-alphanumeric characters.
Not a direct threat, but may indicate unreliable intentions of developer. Non-alphanumeric chars (,.;!#*&") are extremely rare among low risk tokens.

Aeterna.addLiquidity(uint256,uint256) (#860-869) ignores return value by router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#861-868)
Ensure that all the return values of the function calls are used.

Additional information: link

Aeterna.isContract(address) (#590-594) uses assembly
- INLINE ASM (#592)
Do not use evm assembly.

Additional information: link

SafeMathInt.MAX_INT256 (#6) is never used in SafeMathInt (#4-38)
Remove unused state variables.

Additional information: link

Aeterna.slitherConstructorVariables() (#394-919) uses literals with too many digits:
- DEAD = 0x000000000000000000000000000000000000dEaD (#399)
Aeterna.slitherConstructorVariables() (#394-919) uses literals with too many digits:
- ZERO = 0x0000000000000000000000000000000000000000 (#400)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

Aeterna.DEAD (#399) should be constant
Aeterna.ZERO (#400) should be constant
Aeterna.feeDenominator (#422) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

Attempt to swap token was unsuccessful. For some reason it is untradeable. If token is not in presale stage and is not traded outside PancakeSwap, then it's a scam

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.

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

Token is deployed only at one blockchain

Unable to find token on CoinGecko

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Token was delisted (assigned to inactive / untracked listing) from CoinMarketCap

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Unable to find KYC or doxxing proof

Unable to find token on CoinHunt

Additional information: link

Unable to find audit link on the website

Token is not listed at Mobula.Finance

Additional information: link

Token is marked as scam (rug pull, honeypot, phishing, etc.)

Additional information: link

Token has no active CoinGecko listing / rank

Young tokens have high risks of price dump / death

Token has no active CoinMarketCap listing / rank

Young tokens have high risks of price dump / death

Young tokens have high risks of price dump / death