Mello Token

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

Reentrancy in MelloToken._transfer(address,address,uint256) (#1008-1052):
External calls:
- swapAndLiquify(contractTokenBalance) (#1039)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1100-1107)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1086-1092)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1039)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1100-1107)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#964)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1142)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1133)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1134)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1153)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#880)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1144)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1154)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#882)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- _rTotal = _rTotal.sub(rFee) (#919)
- _tokenTransfer(from,to,amount,takeFee) (#1051)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#966)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1152)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#879)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1143)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#881)
Apply the check-effects-interactions pattern.

Additional information: link

MelloToken.addLiquidity(uint256,uint256) (#1095-1108) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1100-1107)
Ensure that all the return values of the function calls are used.

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MelloToken._approve(address,address,uint256).owner (#1000) shadows:
- Ownable.owner() (#432-434) (function)
Rename the local variables that shadow another component.

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MelloToken.setMaxTxPercent(uint256) (#904-908) should emit an event for:
- _maxTxAmount = _tTotal.mul(maxTxPercent).div(3 ** 2) (#905-907)
Emit an event for critical parameter changes.

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Reentrancy in MelloToken.transferFrom(address,address,uint256) (#805-809):
External calls:
- _transfer(sender,recipient,amount) (#806)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1100-1107)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1086-1092)
External calls sending eth:
- _transfer(sender,recipient,amount) (#806)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1100-1107)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#807)
- _allowances[owner][spender] = amount (#1004)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in MelloToken.transferFrom(address,address,uint256) (#805-809):
External calls:
- _transfer(sender,recipient,amount) (#806)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1100-1107)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1086-1092)
External calls sending eth:
- _transfer(sender,recipient,amount) (#806)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1100-1107)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#1005)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#807)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#479-484) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (#481)
Avoid relying on block.timestamp.

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Address._functionCallWithValue(address,bytes,uint256,string) (#377-398) uses assembly
- INLINE ASM (#390-393)
Do not use evm assembly.

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SafeMath.mod(uint256,uint256,string) (#245-248) is never used and should be removed
Remove unused functions.

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MelloToken._previousLiquidityFee (#727) is set pre-construction with a non-constant function or state variable:
- _liquidityFee
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 Address._functionCallWithValue(address,bytes,uint256,string) (#377-398):
- (success,returndata) = target.call{value: weiValue}(data) (#381)
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 MelloToken._maxTxAmount (#735) is not in mixedCase
Follow the Solidity naming convention.

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Redundant expression "this (#257)" inContext (#251-260)
Remove redundant statements if they congest code but offer no value.

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Variable MelloToken._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#940) is too similar to MelloToken._transferToExcluded(address,address,uint256).tTransferAmount (#1141)
Prevent variables from having similar names.

Additional information: link

MelloToken.slitherConstructorVariables() (#701-1164) uses literals with too many digits:
- numTokensSellToAddToLiquidity = 500000 * 10 ** 6 * 10 ** 9 (#736)
Use: Ether suffix, Time suffix, or The scientific notation

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MelloToken.numTokensSellToAddToLiquidity (#736) should be constant
Add the constant attributes to state variables that never change.

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isExcludedFromFee(address) should be declared external:
- MelloToken.isExcludedFromFee(address) (#996-998)
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.

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.

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

Additional information: link

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

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Unable to find token contract audit

Unable to find audit link on the website

Unable to find whitepaper link on the website

Young tokens have high risks of scam / price dump / death

Young tokens have high risks of scam / price dump / death

Token has no active CoinMarketCap listing / rank

Token has a considerable age, but social accounts / website are missing or have few users

Token has a considerable age, but average PancakeSwap 30d trading volume is low

Token has relatively low CoinGecko rank