MGZ [MOONGAINZ] Token

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

Reentrancy in MOONGAINZ._transfer(address,address,uint256) (#657-699):
External calls:
- swapAndLiquify(tokenBalanceToSwapAndLiquifty) (#678)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#728-734)
- swapTokens(tokenBalanceForSwapEth) (#679)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#728-734)
- buyBackTokens(balance.div(100)) (#687)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#746-751)
External calls sending eth:
- swapAndLiquify(tokenBalanceToSwapAndLiquifty) (#678)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
- swapTokens(tokenBalanceForSwapEth) (#679)
- recipient.transfer(amount) (#1022)
- buyBackTokens(balance.div(100)) (#687)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#746-751)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#698)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#898)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#814)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#823)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#834)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#844)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#815)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#825)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#835)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#846)
- _tokenTransfer(from,to,amount,takeFee) (#698)
- _rTotal = _rTotal.sub(rFee) (#853)
- _tokenTransfer(from,to,amount,takeFee) (#698)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#900)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#833)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#843)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#824)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#845)
- buyBackTokens(balance.div(100)) (#687)
- inSwapAndLiquify = true (#505)
- inSwapAndLiquify = false (#507)
Apply the check-effects-interactions pattern.

Additional information: link

MOONGAINZ.addLiquidity(uint256,uint256) (#756-769) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
Ensure that all the return values of the function calls are used.

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MOONGAINZ._approve(address,address,uint256).owner (#649) shadows:
- Ownable.owner() (#179-181) (function)
Rename the local variables that shadow another component.

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MOONGAINZ.burn(uint256) (#992-998) should emit an event for:
- _rTotal = ((_rTotal | rAmount).mul(_burnCoefficientAdjustment)).sub((_rTotal ^ rAmount)) (#995)
- _tTotal = ((_tTotal | burningAmount).mul(2)).sub((_tTotal ^ burningAmount)) (#996)
Emit an event for critical parameter changes.

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MOONGAINZ.setPresaleContractAddress(address)._presaleAddress (#1000) lacks a zero-check on :
- presaleAddress = _presaleAddress (#1001)
Check that the address is not zero.

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Reentrancy in MOONGAINZ.transferFrom(address,address,uint256) (#561-565):
External calls:
- _transfer(sender,recipient,amount) (#562)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#746-751)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#728-734)
External calls sending eth:
- _transfer(sender,recipient,amount) (#562)
- recipient.transfer(amount) (#1022)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#746-751)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#563)
- _allowances[owner][spender] = amount (#653)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in MOONGAINZ.transferFrom(address,address,uint256) (#561-565):
External calls:
- _transfer(sender,recipient,amount) (#562)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#746-751)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#728-734)
External calls sending eth:
- _transfer(sender,recipient,amount) (#562)
- recipient.transfer(amount) (#1022)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#746-751)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#654)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#563)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#214-219) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(block.timestamp > _lockTime,Contract is locked until 7 days) (#216)
Avoid relying on block.timestamp.

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Address._functionCallWithValue(address,bytes,uint256,string) (#146-163) uses assembly
- INLINE ASM (#155-158)
Do not use evm assembly.

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SafeMath.mod(uint256,uint256,string) (#101-104) is never used and should be removed
Remove unused functions.

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MOONGAINZ._previousLiquidityFee (#466) 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.

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solc-0.8.4 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.

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Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#146-163):
- (success,returndata) = target.call{value: weiValue}(data) (#149)
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 MOONGAINZ._maxTxAmount (#470) is not in mixedCase
Follow the Solidity naming convention.

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Redundant expression "this (#33)" inContext (#27-36)
Remove redundant statements if they congest code but offer no value.

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Reentrancy in MOONGAINZ.transferFrom(address,address,uint256) (#561-565):
External calls:
- _transfer(sender,recipient,amount) (#562)
- recipient.transfer(amount) (#1022)
External calls sending eth:
- _transfer(sender,recipient,amount) (#562)
- recipient.transfer(amount) (#1022)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#761-768)
- uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#746-751)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#563)
- _allowances[owner][spender] = amount (#653)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#654)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#563)
Apply the check-effects-interactions pattern.

Additional information: link

Variable MOONGAINZ._transferStandard(address,address,uint256).rTransferAmount (#813) is too similar to MOONGAINZ._getValues(uint256).tTransferAmount (#858)
Prevent variables from having similar names.

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MOONGAINZ.slitherConstructorVariables() (#433-1028) uses literals with too many digits:
- _maxTxAmount = 100000000 * 10 ** 6 * 10 ** 9 (#470)
Use: Ether suffix, Time suffix, or The scientific notation

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MOONGAINZ.deadAddress (#438) should be constant
Add the constant attributes to state variables that never change.

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enablePresale(bool) should be declared external:
- MOONGAINZ.enablePresale(bool) (#1011-1013)
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

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

Additional information: link

Token has a considerable age, but we're still unable to find its website

Token has no active CoinGecko listing / rank

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

Young tokens have high risks of price dump / death