METASFM [MetaSafeMoon] Token

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

METASFM.swapBack() (#572-641) sends eth to arbitrary user
Dangerous calls:
- (success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
- (success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
- (success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in METASFM._transferFrom(address,address,uint256) (#507-545):
External calls:
- swapBack() (#527)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#594-600)
- (success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
- (success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
- (success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#632-639)
External calls sending eth:
- swapBack() (#527)
- (success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
- (success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
- (success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#632-639)
State variables written after the call(s):
- _gonBalances[sender] = _gonBalances[sender].sub(gonAmount) (#530)
- _gonBalances[recipient] = _gonBalances[recipient].add(gonAmountReceived) (#535-537)
- gonAmountReceived = takeFee(sender,gonAmount) (#532-534)
- _gonBalances[address(this)] = _gonBalances[address(this)].add(feeAmount) (#564-566)
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.

METASFM.swapBack().success (#616) is written in both
(success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
(success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
METASFM.swapBack().success (#616) is written in both
(success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
(success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
METASFM.swapBack().success (#616) is written in both
(success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
success = false (#629)
Fix or remove the writes.

Additional information: link

Not a direct threat, but may indicate unreliable intentions of developer. Widespread names (e.g. Elon, King, Moon, Doge) are common among meme-tokens and scams. The allow to gain free hype and attract unexperienced investors.

METASFM.swapBack() (#572-641) has external calls inside a loop: path[1] = router.WETH() (#590)
METASFM.swapBack() (#572-641) has external calls inside a loop: router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#594-600)
METASFM.swapBack() (#572-641) has external calls inside a loop: (success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
METASFM.swapBack() (#572-641) has external calls inside a loop: (success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
METASFM.swapBack() (#572-641) has external calls inside a loop: (success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
METASFM.swapBack() (#572-641) has external calls inside a loop: router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#632-639)
Favor pull over push strategy for external calls.

Additional information: link

METASFM.swapping() (#379-383) has costly operations inside a loop:
- inSwap = true (#380)
METASFM.swapping() (#379-383) has costly operations inside a loop:
- inSwap = false (#382)
Use a local variable to hold the loop computation result.

Additional information: link

METASFM.swapBack() (#572-641) performs a multiplication on the result of a division:
-contractTokenBalance = _gonBalances[address(this)].div(_gonsPerFragment) (#579-581)
-amountToLiquify = contractTokenBalance.mul(dynamicLiquidityFee).div(totalFee).div(2) (#582-585)
METASFM.setMaxWalletToken(uint256,uint256) (#715-720) performs a multiplication on the result of a division:
-gonMaxWallet = TOTAL_GONS.div(_denom).mul(_num) (#719)
METASFM.setSwapBackSettings(bool,uint256,uint256) (#738-745) performs a multiplication on the result of a division:
-gonSwapThreshold = TOTAL_GONS.div(_denom).mul(_num) (#744)
METASFM.getLiquidityBacking(uint256) (#829-837) performs a multiplication on the result of a division:
-liquidityBalance = _gonBalances[pair].div(_gonsPerFragment) (#834)
-accuracy.mul(liquidityBalance.mul(2)).div(getCirculatingSupply()) (#835-836)
METASFM.slitherConstructorVariables() (#313-849) performs a multiplication on the result of a division:
-gonMaxWallet = TOTAL_GONS.div(100).mul(5) (#352)
Consider ordering multiplication before division.

Additional information: link

METASFM.swapBack() (#572-641) ignores return value by router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#632-639)
Ensure that all the return values of the function calls are used.

Additional information: link

ERC20Detailed.constructor(string,string,uint8).name (#144) shadows:
- ERC20Detailed.name() (#153-155) (function)
ERC20Detailed.constructor(string,string,uint8).symbol (#145) shadows:
- ERC20Detailed.symbol() (#157-159) (function)
ERC20Detailed.constructor(string,string,uint8).decimals (#146) shadows:
- ERC20Detailed.decimals() (#161-163) (function)
Rename the local variables that shadow another component.

Additional information: link

METASFM.setMaster(address) (#455-457) should emit an event for:
- master = _master (#456)
Emit an event for critical parameter changes.

Additional information: link

METASFM.setMaxWalletToken(uint256,uint256) (#715-720) should emit an event for:
- gonMaxWallet = TOTAL_GONS.div(_denom).mul(_num) (#719)
METASFM.setSwapBackSettings(bool,uint256,uint256) (#738-745) should emit an event for:
- gonSwapThreshold = TOTAL_GONS.div(_denom).mul(_num) (#744)
METASFM.setTargetLiquidity(uint256,uint256) (#747-750) should emit an event for:
- targetLiquidity = target (#748)
- targetLiquidityDenominator = accuracy (#749)
METASFM.setFees(uint256,uint256,uint256,uint256,uint256) (#764-778) should emit an event for:
- ecosystemFee = _ecosystemFee (#771)
- liquidityFee = _liquidityFee (#772)
- buyBackFee = _buyBackFee (#773)
- marketingFee = _marketingFee (#774)
- totalFee = ecosystemFee.add(liquidityFee).add(marketingFee).add(buyBackFee) (#775)
- feeDenominator = _feeDenominator (#776)
Emit an event for critical parameter changes.

Additional information: link

METASFM.setMaster(address)._master (#455) lacks a zero-check on :
- master = _master (#456)
METASFM.setFeeReceivers(address,address,address,address)._autoLiquidityReceiver (#781) lacks a zero-check on :
- autoLiquidityReceiver = _autoLiquidityReceiver (#786)
METASFM.setFeeReceivers(address,address,address,address)._ecosystemFeeReceiver (#782) lacks a zero-check on :
- ecosystemFeeReceiver = _ecosystemFeeReceiver (#787)
METASFM.setFeeReceivers(address,address,address,address)._marketingFeeReceiver (#783) lacks a zero-check on :
- marketingFeeReceiver = _marketingFeeReceiver (#788)
METASFM.setFeeReceivers(address,address,address,address)._buyBackFeeReceiver (#784) lacks a zero-check on :
- buyBackFeeReceiver = _buyBackFeeReceiver (#789)
METASFM.clearStuckBalance(uint256,address).adr (#800) lacks a zero-check on :
- address(adr).transfer((amountETH * amountPercentage) / 100) (#802-804)
Check that the address is not zero.

Additional information: link

Reentrancy in METASFM.constructor() (#424-453):
External calls:
- pair = IDEXFactory(router.factory()).createPair(router.WETH(),address(this)) (#427-430)
State variables written after the call(s):
- _allowedFragments[address(this)][address(router)] = uint256(- 1) (#431)
- _gonBalances[msg.sender] = TOTAL_GONS (#435)
- _gonsPerFragment = TOTAL_GONS.div(_totalSupply) (#436)
- _isFeeExempt[msg.sender] = true (#439)
- _isFeeExempt[address(this)] = true (#440)
- _isMaxWalletExempt[pair] = true (#442)
- _isMaxWalletExempt[DEAD] = true (#443)
- _isMaxWalletExempt[address(this)] = true (#444)
- _isMaxWalletExempt[msg.sender] = true (#445)
- _totalSupply = INITIAL_FRAGMENTS_SUPPLY (#434)
- autoLiquidityReceiver = 0x2D538dFFbC5a4478ebBFCb8b7a1796D842Ab9215 (#447)
- buyBackFeeReceiver = 0x80203b93b9f7bc4c48F6D9d73C5075d61F717a3f (#450)
- ecosystemFeeReceiver = 0x18cBAD177D661A14b0288e3F0128dC1807093076 (#449)
- initialDistributionFinished = false (#438)
- marketingFeeReceiver = 0xc3FFB967a8AAeCD3027464699E00B17E91AfEE02 (#448)
- pairContract = InterfaceLP(pair) (#432)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in METASFM._transferFrom(address,address,uint256) (#507-545):
External calls:
- swapBack() (#527)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#594-600)
- (success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
- (success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
- (success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#632-639)
External calls sending eth:
- swapBack() (#527)
- (success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
- (success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
- (success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
- router.addLiquidityETH{value: amountETHLiquidity}(address(this),amountToLiquify,0,0,autoLiquidityReceiver,block.timestamp) (#632-639)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount.div(_gonsPerFragment)) (#567)
- gonAmountReceived = takeFee(sender,gonAmount) (#532-534)
- Transfer(sender,recipient,gonAmountReceived.div(_gonsPerFragment)) (#539-543)
Reentrancy in METASFM.constructor() (#424-453):
External calls:
- pair = IDEXFactory(router.factory()).createPair(router.WETH(),address(this)) (#427-430)
Event emitted after the call(s):
- Transfer(address(0x0),msg.sender,_totalSupply) (#452)
Reentrancy in METASFM.rebase(uint256,int256) (#396-422):
External calls:
- pairContract.sync() (#418)
Event emitted after the call(s):
- LogRebase(epoch,_totalSupply) (#420)
Apply the check-effects-interactions pattern.

Additional information: link

METASFM.transferToAddressETH(address,uint256) (#807-811) is never used and should be removed
SafeMath.mod(uint256,uint256) (#99-102) is never used and should be removed
SafeMathInt.abs(int256) (#196-199) is never used and should be removed
SafeMathInt.add(int256,int256) (#190-194) is never used and should be removed
SafeMathInt.div(int256,int256) (#178-182) is never used and should be removed
SafeMathInt.mul(int256,int256) (#170-176) is never used and should be removed
SafeMathInt.sub(int256,int256) (#184-188) is never used and should be removed
Remove unused functions.

Additional information: link

METASFM.totalFee (#358-359) is set pre-construction with a non-constant function or state variable:
- ecosystemFee.add(liquidityFee).add(marketingFee).add(buyBackFee)
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

Pragma version^0.7.4 (#48) 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

Low level call in METASFM.swapBack() (#572-641):
- (success) = address(marketingFeeReceiver).call{gas: 30000,value: amountETHMarketing}() (#616-619)
- (success,None) = address(buyBackFeeReceiver).call{gas: 30000,value: amountETHBuyBack}() (#620-623)
- (success,None) = address(ecosystemFeeReceiver).call{gas: 30000,value: amountETHEco}() (#624-627)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IDEXRouter.WETH() (#254) is not in mixedCase
Parameter METASFM.setMaster(address)._master (#455) is not in mixedCase
Parameter METASFM.setLP(address)._address (#459) is not in mixedCase
Parameter METASFM.enableTransfer(address)._addr (#695) is not in mixedCase
Parameter METASFM.setFeeExempt(address)._addr (#699) is not in mixedCase
Parameter METASFM.checkFeeExempt(address)._addr (#703) is not in mixedCase
Parameter METASFM.setMaxWalletExempt(address)._addr (#707) is not in mixedCase
Parameter METASFM.checkMaxWalletExempt(address)._addr (#711) is not in mixedCase
Parameter METASFM.setMaxWalletToken(uint256,uint256)._num (#715) is not in mixedCase
Parameter METASFM.setMaxWalletToken(uint256,uint256)._denom (#715) is not in mixedCase
Parameter METASFM.setSwapBackSettings(bool,uint256,uint256)._enabled (#739) is not in mixedCase
Parameter METASFM.setSwapBackSettings(bool,uint256,uint256)._num (#740) is not in mixedCase
Parameter METASFM.setSwapBackSettings(bool,uint256,uint256)._denom (#741) is not in mixedCase
Parameter METASFM.setFees(uint256,uint256,uint256,uint256,uint256)._ecosystemFee (#765) is not in mixedCase
Parameter METASFM.setFees(uint256,uint256,uint256,uint256,uint256)._liquidityFee (#766) is not in mixedCase
Parameter METASFM.setFees(uint256,uint256,uint256,uint256,uint256)._buyBackFee (#767) is not in mixedCase
Parameter METASFM.setFees(uint256,uint256,uint256,uint256,uint256)._marketingFee (#768) is not in mixedCase
Parameter METASFM.setFees(uint256,uint256,uint256,uint256,uint256)._feeDenominator (#769) is not in mixedCase
Parameter METASFM.setFeeReceivers(address,address,address,address)._autoLiquidityReceiver (#781) is not in mixedCase
Parameter METASFM.setFeeReceivers(address,address,address,address)._ecosystemFeeReceiver (#782) is not in mixedCase
Parameter METASFM.setFeeReceivers(address,address,address,address)._marketingFeeReceiver (#783) is not in mixedCase
Parameter METASFM.setFeeReceivers(address,address,address,address)._buyBackFeeReceiver (#784) is not in mixedCase
Variable METASFM._isFeeExempt (#331) is not in mixedCase
Variable METASFM._isMaxWalletExempt (#332) is not in mixedCase
Variable METASFM.DEAD (#362) is not in mixedCase
Variable METASFM.ZERO (#363) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#259) is too similar to IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#260)
Prevent variables from having similar names.

Additional information: link

METASFM.slitherConstructorVariables() (#313-849) uses literals with too many digits:
- DEAD = 0x000000000000000000000000000000000000dEaD (#362)
METASFM.slitherConstructorVariables() (#313-849) uses literals with too many digits:
- ZERO = 0x0000000000000000000000000000000000000000 (#363)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

SafeMathInt.MAX_INT256 (#168) is never used in SafeMathInt (#166-200)
Remove unused state variables.

Additional information: link

METASFM.DEAD (#362) should be constant
METASFM.ZERO (#363) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

name() should be declared external:
- ERC20Detailed.name() (#153-155)
symbol() should be declared external:
- ERC20Detailed.symbol() (#157-159)
decimals() should be declared external:
- ERC20Detailed.decimals() (#161-163)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#229-232)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#234-236)
rescueToken(address,uint256) should be declared external:
- METASFM.rescueToken(address,uint256) (#792-798)
Use the external attribute for functions never called from the contract.

Additional information: link

Token is deployed only at one blockchain

Unable to find PancakeSwap trading pair to compute liquidity.

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

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

Additional information: link

Unable to find token contract audit

Unable to find audit link on the website

Unable to find whitepaper link on the website

Unable to find code repository for the project

Young tokens have high risks of price dump / death

Young tokens have high risks of scam / 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

Token has relatively low CoinGecko rank

Token has relatively low CoinMarketCap rank