MNOM [MetaNomics] Token

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

Reentrancy in Metanomics._transfer(address,address,uint256) (#1073-1112):
External calls:
- swapAndLiquify(numTokensSellToAddToLiquidity) (#1094)
- (success) = recipient.call{value: amount}() (#312)
- (ethToLiquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1160-1167)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1146-1152)
- address(_MarketingWallet).sendValue(MarketingTokens) (#1132)
External calls sending eth:
- swapAndLiquify(numTokensSellToAddToLiquidity) (#1094)
- (success) = recipient.call{value: amount}() (#312)
- (ethToLiquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1160-1167)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#1111)
- _liquidityFee = _previousLiquidityFee (#1058)
- _liquidityFee = 0 (#1053)
- _tokenTransfer(from,to,amount,takeFee) (#1111)
- _rOwned[address(this)] = _rOwned[address(this)].add(rAmount) (#1038)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1178)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1179)
- _tokenTransfer(from,to,amount,takeFee) (#1111)
- _rTotal = _rTotal.sub(rFee) (#992)
- _tokenTransfer(from,to,amount,takeFee) (#1111)
- _tFeeTotal = _tFeeTotal.add(tFee) (#993)
- _tokenTransfer(from,to,amount,takeFee) (#1111)
- _tOwned[address(this)] = _tOwned[address(this)].add(amount) (#1041)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1182)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1185)
Apply the check-effects-interactions pattern.

Additional information: link

Metanomics.meta(uint256) (#866-884) contains a tautology or contradiction:
- require(bool,string)(totalFees() >= 0,no negative fee) (#877)
Fix the incorrect comparison by changing the value type or the comparison.

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Metanomics._symbol (#703) should be constant
Add the constant attributes to state variables that never change.

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Metanomics._approve(address,address,uint256).owner (#1065) shadows:
- Ownable.owner() (#429-431) (function)
Rename the local variables that shadow another component.

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Metanomics.setmaxTX(uint16) (#977-981) should emit an event for:
- _maxTXAmount = maxTXAmount (#980)
Emit an event for critical parameter changes.

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Reentrancy in Metanomics.transferFrom(address,address,uint256) (#832-836):
External calls:
- _transfer(sender,recipient,amount) (#833)
- (success) = recipient.call{value: amount}() (#312)
- (ethToLiquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1160-1167)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1146-1152)
- address(_MarketingWallet).sendValue(MarketingTokens) (#1132)
External calls sending eth:
- _transfer(sender,recipient,amount) (#833)
- (success) = recipient.call{value: amount}() (#312)
- (ethToLiquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1160-1167)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#834)
- _allowances[owner][spender] = amount (#1069)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in Metanomics.transferFrom(address,address,uint256) (#832-836):
External calls:
- _transfer(sender,recipient,amount) (#833)
- (success) = recipient.call{value: amount}() (#312)
- (ethToLiquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1160-1167)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1146-1152)
- address(_MarketingWallet).sendValue(MarketingTokens) (#1132)
External calls sending eth:
- _transfer(sender,recipient,amount) (#833)
- (success) = recipient.call{value: amount}() (#312)
- (ethToLiquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1160-1167)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#1070)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#834)
Apply the check-effects-interactions pattern.

Additional information: link

Metanomics._transfer(address,address,uint256) (#1073-1112) uses timestamp for comparisons
Dangerous comparisons:
- _nextmetaIdx < _metaTime.length && _metaTime[_nextmetaIdx] <= block.timestamp (#1085)
Avoid relying on block.timestamp.

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Address._functionCallWithValue(address,bytes,uint256,string) (#374-395) uses assembly
- INLINE ASM (#387-390)
Do not use evm assembly.

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Metanomics._transfer(address,address,uint256) (#1073-1112) compares to a boolean constant:
-firstTx == true && to == uniswapV2Pair && from == owner() (#1079)
Remove the equality to the boolean constant.

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SafeMath.mod(uint256,uint256,string) (#242-245) is never used and should be removed
Remove unused functions.

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Metanomics.numTokensSellToAddToLiquidity (#750) is set pre-construction with a non-constant function or state variable:
- 0 * 10 ** _decimals
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.

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solc-0.8.8 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.

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Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#374-395):
- (success,returndata) = target.call{value: weiValue}(data) (#378)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

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Variable Metanomics._maxBuyAmount (#748) is not in mixedCase
Follow the Solidity naming convention.

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Redundant expression "this (#254)" inContext (#248-257)
Remove redundant statements if they congest code but offer no value.

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Variable Metanomics._getRValues(uint256,uint256,uint256,uint256,uint256).rTransferAmount (#1015) is too similar to Metanomics._getTValues(uint256).tTransferAmount (#1006)
Prevent variables from having similar names.

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Metanomics.slitherConstructorConstantVariables() (#697-1195) uses literals with too many digits:
- BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD (#737)
Use: Ether suffix, Time suffix, or The scientific notation

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isExcludedFromFee(address) should be declared external:
- Metanomics.isExcludedFromFee(address) (#1061-1063)
Use the external attribute for functions never called from the contract.

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

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

Token is deployed only at one blockchain

Token has only one trading pair

Unable to find PancakeSwap trading pair to compute liquidity.

Unable to find PancakeSwap trading pair to compute volume.

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

Unable to find website, listings and other project-related information

Young tokens have high risks of price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank