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Mello Token

About Mello

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Token 22 months
CoinMarketCap 21 months
white paper

We have designed a cryptocurrency called the Mello Token for the purpose of integration into our VR Casino concept.

Laser Scorebeta Last Audit: 30 November 2021

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Token is either risky or in presale. For presale 30+ is a fine score.

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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.

Additional information: link

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

Additional information: link

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.

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)
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.

Additional information: link

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

Additional information: link

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

Additional information: link

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

Additional information: link

Variable MelloToken._maxTxAmount (#735) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

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

Additional information: link

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

Additional information: link

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

Additional information: link

isExcludedFromFee(address) should be declared external:
- MelloToken.isExcludedFromFee(address) (#996-998)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


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.


Twitter account link seems to be invalid


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

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


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

Price for Mello