ES2 [EverSAFUv2] Token

DividendDistributor.distributeDividend(address) (#467-478) ignores return value by BUSD.transfer(shareholder,amount) (#473)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

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

Reentrancy in EverSAFUv2._transferFrom(address,address,uint256) (#790-833):
External calls:
- rebase() (#802)
- pairContract.sync() (#749)
- addLiquidity() (#806)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#886-892)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
- swapBack() (#810)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#923-929)
- distributor.deposit{value: amountETHToTreasuryAndSIF.mul(busdDividendFee).div(treasuryFee.add(busdDividendFee))}() (#935-937)
External calls sending eth:
- addLiquidity() (#806)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
- swapBack() (#810)
- distributor.deposit{value: amountETHToTreasuryAndSIF.mul(busdDividendFee).div(treasuryFee.add(busdDividendFee))}() (#935-937)
State variables written after the call(s):
- _gonBalances[sender] = _gonBalances[sender].sub(gonAmount) (#814)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonAmountReceived) (#818-820)
- gonAmountReceived = takeFee(sender,recipient,gonAmount) (#815-817)
- _gonBalances[autofirePit] = _gonBalances[autofirePit].add(gonAmount.div(feeDenominator).mul(autofirePitFee)) (#851-853)
- _gonBalances[address(this)] = _gonBalances[address(this)].add(gonAmount.div(feeDenominator).mul(treasuryFee.add(busdDividendFee))) (#854-856)
- _gonBalances[autoLiquidityReceiver] = _gonBalances[autoLiquidityReceiver].add(gonAmount.div(feeDenominator).mul(liquidityFee)) (#857-859)
- swapBack() (#810)
- inSwap = true (#641)
- inSwap = false (#643)
Apply the check-effects-interactions pattern.

Additional information: link

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)

Pragma version^0.8.11 (#14) necessitates a version too recent to be trusted. Consider deploying with 0.6.12/0.7.6/0.8.7
solc-0.8.11 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

SafeMathInt.MAX_INT256 (#18) is never used in SafeMathInt (#16-50)
Remove unused state variables.

Additional information: link

EverSAFUv2.DEAD (#627) should be constant
EverSAFUv2.feeDenominator (#615) should be constant
EverSAFUv2._minSharesRequired (#620) should be constant
DividendDistributor.dividendsPerShareAccuracyFactor (#370) should be constant
EverSAFUv2.sellFee (#612) should be constant
EverSAFUv2.ZERO (#628) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

EverSAFUv2.slitherConstructorVariables() (#582-1183) uses literals with too many digits:
- ZERO = 0x0000000000000000000000000000000000000000 (#628)
EverSAFUv2.slitherConstructorVariables() (#582-1183) uses literals with too many digits:
- DEAD = 0x000000000000000000000000000000000000dEaD (#627)
EverSAFUv2.constructor() (#666-717) uses literals with too many digits:
- autofirePit = 0x000000000000000000000000000000000000dEaD (#681)
EverSAFUv2.slitherConstructorVariables() (#582-1183) uses literals with too many digits:
- distributorGas = 500000 (#635)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

Reentrancy in DividendDistributor.process(uint256) (#438-461):
External calls:
- distributeDividend(shareholders[currentIndex]) (#453)
- BUSD.transfer(shareholder,amount) (#473)
State variables written after the call(s):
- currentIndex ++ (#458)
Reentrancy in DividendDistributor.setShare(address,uint256) (#402-416):
External calls:
- distributeDividend(shareholder) (#404)
- BUSD.transfer(shareholder,amount) (#473)
State variables written after the call(s):
- shares[shareholder].amount = amount (#414)
- shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount) (#415)
Reentrancy in DividendDistributor.distributeDividend(address) (#467-478):
External calls:
- BUSD.transfer(shareholder,amount) (#473)
State variables written after the call(s):
- shares[shareholder].totalRealised = shares[shareholder].totalRealised.add(amount) (#475)
- shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount) (#476)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in DividendDistributor.deposit() (#418-436):
External calls:
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: msg.value}(0,path,address(this),block.timestamp) (#425-430)
State variables written after the call(s):
- dividendsPerShare = dividendsPerShare.add(dividendsPerShareAccuracyFactor.mul(amount).div(totalShares)) (#435)
- totalDividends = totalDividends.add(amount) (#434)
Reentrancy in EverSAFUv2.addLiquidity() (#865-907):
External calls:
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#886-892)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
External calls sending eth:
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
State variables written after the call(s):
- _lastAddLiquidityTime = block.timestamp (#906)
Reentrancy in DividendDistributor.setShare(address,uint256) (#402-416):
External calls:
- distributeDividend(shareholder) (#404)
- BUSD.transfer(shareholder,amount) (#473)
State variables written after the call(s):
- addShareholder(shareholder) (#408)
- shareholderIndexes[shareholder] = shareholders.length (#500)
- removeShareholder(shareholder) (#410)
- shareholderIndexes[shareholders[shareholders.length - 1]] = shareholderIndexes[shareholder] (#506)
- addShareholder(shareholder) (#408)
- shareholders.push(shareholder) (#501)
- removeShareholder(shareholder) (#410)
- shareholders[shareholderIndexes[shareholder]] = shareholders[shareholders.length - 1] (#505)
- shareholders.pop() (#507)
- totalShares = totalShares.sub(shares[shareholder].amount).add(amount) (#413)
Reentrancy in DividendDistributor.distributeDividend(address) (#467-478):
External calls:
- BUSD.transfer(shareholder,amount) (#473)
State variables written after the call(s):
- shareholderClaims[shareholder] = block.timestamp (#474)
Apply the check-effects-interactions pattern.

Additional information: link

EverSAFUv2.addLiquidity() (#865-907) ignores return value by router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
Ensure that all the return values of the function calls are used.

Additional information: link

EverSAFUv2.setMinimumSharesRequired(uint256)._minSharesRequired (#1092) shadows:
- EverSAFUv2._minSharesRequired (#620) (state variable)
Rename the local variables that shadow another component.

Additional information: link

DividendDistributor.setDistributionCriteria(uint256,uint256) (#393-396) should emit an event for:
- minPeriod = _minPeriod (#394)
- minDistribution = _minDistribution (#395)
Emit an event for critical parameter changes.

Additional information: link

EverSAFUv2.rebase().rebaseRate (#724) 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

DividendDistributor.distributeDividend(address) (#467-478) has external calls inside a loop: BUSD.transfer(shareholder,amount) (#473)
Favor pull over push strategy for external calls.

Additional information: link

EverSAFUv2.setFeeReceivers(address,address,address)._autofirePit (#1114) lacks a zero-check on :
- autofirePit = _autofirePit (#1118)
EverSAFUv2.setFeeReceivers(address,address,address)._treasuryReceiver (#1113) lacks a zero-check on :
- treasuryReceiver = _treasuryReceiver (#1117)
EverSAFUv2.setFeeReceivers(address,address,address)._autoLiquidityReceiver (#1112) lacks a zero-check on :
- autoLiquidityReceiver = _autoLiquidityReceiver (#1116)
Check that the address is not zero.

Additional information: link

Parameter DividendDistributor.setMinimumSharesRequired(uint256)._minSharesRequired (#398) is not in mixedCase
Variable EverSAFUv2._isFeeExempt (#588) is not in mixedCase
Variable EverSAFUv2.DEAD (#627) is not in mixedCase
Event EverSAFUv2minShresRequiredChanged(uint256) (#662) is not in CapWords
Parameter EverSAFUv2.setMinimumSharesRequired(uint256)._minSharesRequired (#1092) is not in mixedCase
Variable EverSAFUv2.ZERO (#628) is not in mixedCase
Parameter EverSAFUv2.setDistributionCriteria(uint256,uint256)._minDistribution (#1083) is not in mixedCase
Parameter EverSAFUv2.setLP(address)._address (#1132) is not in mixedCase
Variable EverSAFUv2._autoRebase (#647) is not in mixedCase
Function IPancakeSwapPair.PERMIT_TYPEHASH() (#152) is not in mixedCase
Parameter EverSAFUv2.setFees(uint256,uint256,uint256,uint256)._autofirePitFee (#1099) is not in mixedCase
Parameter EverSAFUv2.setFeeReceivers(address,address,address)._autofirePit (#1114) is not in mixedCase
Variable DividendDistributor.BUSD (#354) is not in mixedCase
Variable EverSAFUv2._swapEnabledTime (#619) is not in mixedCase
Parameter EverSAFUv2.checkFeeExempt(address)._addr (#1151) is not in mixedCase
Variable EverSAFUv2._lastAddLiquidityTime (#618) is not in mixedCase
Function IPancakeSwapRouter.WETH() (#189) is not in mixedCase
Parameter EverSAFUv2.setAutoAddLiquidity(bool)._flag (#1051) is not in mixedCase
Parameter EverSAFUv2.setFeeReceivers(address,address,address)._autoLiquidityReceiver (#1112) is not in mixedCase
Parameter EverSAFUv2.setFees(uint256,uint256,uint256,uint256)._liquidityFee (#1099) is not in mixedCase
Parameter DividendDistributor.setDistributionCriteria(uint256,uint256)._minDistribution (#393) is not in mixedCase
Function IPancakeSwapPair.DOMAIN_SEPARATOR() (#151) is not in mixedCase
Parameter EverSAFUv2.setBotBlacklist(address,bool)._flag (#1127) is not in mixedCase
Parameter EverSAFUv2.setEnableSwap(bool)._flag (#1060) is not in mixedCase
Variable EverSAFUv2._initRebaseStartTime (#616) is not in mixedCase
Parameter DividendDistributor.setDistributionCriteria(uint256,uint256)._minPeriod (#393) is not in mixedCase
Parameter EverSAFUv2.setBotBlacklist(address,bool)._botAddress (#1127) is not in mixedCase
Parameter EverSAFUv2.setDistributionCriteria(uint256,uint256)._minPeriod (#1083) is not in mixedCase
Function IPancakeSwapPair.MINIMUM_LIQUIDITY() (#169) is not in mixedCase
Constant EverSAFUv2._allowedFragnebt (#623) is not in UPPER_CASE_WITH_UNDERSCORES
Parameter EverSAFUv2.setFeeReceivers(address,address,address)._treasuryReceiver (#1113) is not in mixedCase
Variable DividendDistributor._token (#346) is not in mixedCase
Parameter EverSAFUv2.setWhitelist(address)._addr (#1123) is not in mixedCase
Parameter EverSAFUv2.setAutoRebase(bool)._flag (#1042) is not in mixedCase
Variable EverSAFUv2._autoAddLiquidity (#648) is not in mixedCase
Parameter EverSAFUv2.setFees(uint256,uint256,uint256,uint256)._treasuryFee (#1099) is not in mixedCase
Variable EverSAFUv2._lastRebasedTime (#617) is not in mixedCase
Variable EverSAFUv2._totalSupply (#621) is not in mixedCase
Variable EverSAFUv2._swapEnabled (#649) is not in mixedCase
Variable EverSAFUv2._minSharesRequired (#620) is not in mixedCase
Parameter EverSAFUv2.setFees(uint256,uint256,uint256,uint256)._busdDividendFee (#1099) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

EverSAFUv2.takeFee(address,address,uint256) (#835-863) performs a multiplication on the result of a division:
-_gonBalances[autoLiquidityReceiver] = _gonBalances[autoLiquidityReceiver].add(gonAmount.div(feeDenominator).mul(liquidityFee)) (#857-859)
EverSAFUv2.getLiquidityBacking(uint256) (#1031-1039) performs a multiplication on the result of a division:
-liquidityBalance = _gonBalances[pair].div(_gonsPerFragment) (#1036)
-accuracy.mul(liquidityBalance.mul(2)).div(getCirculatingSupply()) (#1037-1038)
EverSAFUv2.takeFee(address,address,uint256) (#835-863) performs a multiplication on the result of a division:
-_gonBalances[address(this)] = _gonBalances[address(this)].add(gonAmount.div(feeDenominator).mul(treasuryFee.add(busdDividendFee))) (#854-856)
EverSAFUv2.rebase() (#721-752) performs a multiplication on the result of a division:
-times = deltaTime.div(900) (#727)
-_lastRebasedTime = _lastRebasedTime.add(times.mul(900)) (#747)
EverSAFUv2.takeFee(address,address,uint256) (#835-863) performs a multiplication on the result of a division:
-_gonBalances[autofirePit] = _gonBalances[autofirePit].add(gonAmount.div(feeDenominator).mul(autofirePitFee)) (#851-853)
EverSAFUv2.rebase() (#721-752) performs a multiplication on the result of a division:
-times = deltaTime.div(900) (#727)
-epoch = times.mul(15) (#728)
EverSAFUv2.takeFee(address,address,uint256) (#835-863) performs a multiplication on the result of a division:
-feeAmount = gonAmount.div(feeDenominator).mul(_totalFee) (#848)
Consider ordering multiplication before division.

Additional information: link

Reentrancy in EverSAFUv2.rebase() (#721-752):
External calls:
- pairContract.sync() (#749)
Event emitted after the call(s):
- LogRebase(epoch,_totalSupply) (#751)
Reentrancy in EverSAFUv2._transferFrom(address,address,uint256) (#790-833):
External calls:
- rebase() (#802)
- pairContract.sync() (#749)
- addLiquidity() (#806)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#886-892)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
- swapBack() (#810)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#923-929)
- distributor.deposit{value: amountETHToTreasuryAndSIF.mul(busdDividendFee).div(treasuryFee.add(busdDividendFee))}() (#935-937)
- distributor.setShare(sender,balanceOf(sender)) (#822)
- distributor.setShare(recipient,balanceOf(recipient)) (#823)
- distributor.process(distributorGas) (#825)
External calls sending eth:
- addLiquidity() (#806)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
- swapBack() (#810)
- distributor.deposit{value: amountETHToTreasuryAndSIF.mul(busdDividendFee).div(treasuryFee.add(busdDividendFee))}() (#935-937)
Event emitted after the call(s):
- Transfer(sender,recipient,gonAmountReceived.div(_gonsPerFragment)) (#827-831)
Reentrancy in EverSAFUv2._transferFrom(address,address,uint256) (#790-833):
External calls:
- rebase() (#802)
- pairContract.sync() (#749)
- addLiquidity() (#806)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#886-892)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
- swapBack() (#810)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#923-929)
- distributor.deposit{value: amountETHToTreasuryAndSIF.mul(busdDividendFee).div(treasuryFee.add(busdDividendFee))}() (#935-937)
External calls sending eth:
- addLiquidity() (#806)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#897-904)
- swapBack() (#810)
- distributor.deposit{value: amountETHToTreasuryAndSIF.mul(busdDividendFee).div(treasuryFee.add(busdDividendFee))}() (#935-937)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount.div(_gonsPerFragment)) (#861)
- gonAmountReceived = takeFee(sender,recipient,gonAmount) (#815-817)
Apply the check-effects-interactions pattern.

Additional information: link

EverSAFUv2.isContract(address) (#1145-1149) uses assembly
- INLINE ASM (#1147)
Do not use evm assembly.

Additional information: link

SafeMathInt.div(int256,int256) (#28-32) is never used and should be removed
SafeMathInt.abs(int256) (#46-49) is never used and should be removed
SafeMathInt.mul(int256,int256) (#20-26) is never used and should be removed
SafeMathInt.sub(int256,int256) (#34-38) is never used and should be removed
SafeMath.mod(uint256,uint256) (#101-104) is never used and should be removed
SafeMathInt.add(int256,int256) (#40-44) is never used and should be removed
Remove unused functions.

Additional information: link

EverSAFUv2.totalFee (#614) is set pre-construction with a non-constant function or state variable:
- liquidityFee.add(treasuryFee).add(busdDividendFee).add(autofirePitFee)
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

EverSAFUv2.rebase() (#721-752) uses timestamp for comparisons
Dangerous comparisons:
- deltaTimeFromInit < (31536000) (#730)
- deltaTimeFromInit >= (31536000) (#732)
- deltaTimeFromInit >= ((15 * 31536000) / 10) (#734)
- deltaTimeFromInit >= (7 * 31536000) (#736)
- i < times (#740)
EverSAFUv2.shouldRebase() (#950-957) uses timestamp for comparisons
Dangerous comparisons:
- _autoRebase && (_totalSupply < MAX_SUPPLY) && msg.sender != pair && ! inSwap && block.timestamp >= (_lastRebasedTime + 900) (#951-956)
EverSAFUv2.shouldAddLiquidity() (#959-965) uses timestamp for comparisons
Dangerous comparisons:
- _autoAddLiquidity && ! inSwap && msg.sender != pair && block.timestamp >= (_lastAddLiquidityTime + 172800) (#960-964)
DividendDistributor.shouldDistribute(address) (#463-465) uses timestamp for comparisons
Dangerous comparisons:
- shareholderClaims[shareholder] + minPeriod < block.timestamp && getUnpaidEarnings(shareholder) > minDistribution (#464)
Avoid relying on block.timestamp.

Additional information: link

DividendDistributor.process(uint256) (#438-461) has costly operations inside a loop:
- currentIndex = 0 (#449)
DividendDistributor.process(uint256) (#438-461) has costly operations inside a loop:
- currentIndex ++ (#458)
DividendDistributor.distributeDividend(address) (#467-478) has costly operations inside a loop:
- totalDistributed = totalDistributed.add(amount) (#472)
Use a local variable to hold the loop computation result.

Additional information: link

Variable IPancakeSwapRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#194) is too similar to IPancakeSwapRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#195)
Prevent variables from having similar names.

Additional information: link

Average 30d PancakeSwap liquidity 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.

Contract has 10% buy tax and 12% sell tax.
Taxes are suspiciously high (over 10%) and contract ownership is not renounced. Token has a high risk of becoming a honeypot.

Token is deployed only at one blockchain

Token has only one trading pair

Swap operations require suspiciously high gas. Contract logic is complex and may disguise some form of scam.

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

Additional information: link

Unable to find token contract audit

Token is not listed at Mobula.Finance

Additional information: link

Unable to find token on CoinHunt

Additional information: link

Unable to find code repository for the project

Unable to find audit link on the website

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

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Young tokens have high risks of 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