MGAS [MetaSwap Gas] Token

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

Contract creator or owner is blacklisted for past scams

Ownable.__gap (#609) shadows:
- Context.__gap (#421)
ERC20.__gap (#919) shadows:
- Context.__gap (#421)
Remove the state variable shadowing.

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Contract locking ether found:
Contract MGAS (#491-529) has payable functions:
- NFTMarket.constructor(address) (#463-465)
- Market.fallback() (#426-428)
- Market.receive() (#430-432)
- MGAS.constructor(address,address) (#492-501)
But does not have a function to withdraw the ether
Remove the payable attribute or add a withdraw function.

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Redundant expression "this (#417)" inContext (#400-422)
Remove redundant statements if they congest code but offer no value.

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Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#930) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#931)
Prevent variables from having similar names.

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ERC20._burn(address,uint256) (#862-870) uses literals with too many digits:
- _balances[0x000000000000000000000000000000000000dEaD] = _balances[0x000000000000000000000000000000000000dEaD].add(amount) (#868)
ERC20._burn(address,uint256) (#862-870) uses literals with too many digits:
- Transfer(account,0x000000000000000000000000000000000000dEaD,amount) (#869)
Use: Ether suffix, Time suffix, or The scientific notation

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Initializable.______gap (#382) is never used in MGas (#1133-1142)
Ownable.__gap (#609) is never used in MGas (#1133-1142)
Remove unused state variables.

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MGAS.constructor(address,address)._customer (#494) shadows:
- MGAS._customer() (#517-523) (function)
Rename the local variables that shadow another component.

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Modifier MGAS.isCustomer() (#505-511) does not always execute _; or revert
All the paths in a modifier must execute _ or revert.

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Address.isContract(address) (#246-253) uses assembly
- INLINE ASM (#249-251)
Address._functionCallWithValue(address,bytes,uint256,string) (#293-319) uses assembly
- INLINE ASM (#311-314)
Initializable.isConstructor() (#369-379) uses assembly
- INLINE ASM (#377)
Market._act(address) (#436-452) uses assembly
- INLINE ASM (#437-451)
NFTMarket._nft() (#469-474) uses assembly
- INLINE ASM (#471-473)
NFTMarket._setBusiness(address) (#480-488) uses assembly
- INLINE ASM (#485-487)
MGAS.constructor(address,address) (#492-501) uses assembly
- INLINE ASM (#498-500)
MGAS._customer() (#517-523) uses assembly
- INLINE ASM (#520-522)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['0.6.12', '>=0.4.24<0.7.0', '>=0.6.0<0.8.0', '^0.6.0']
- ^0.6.0 (#5)
- ^0.6.0 (#166)
- 0.6.12 (#243)
- >=0.4.24<0.7.0 (#323)
- ^0.6.0 (#388)
- ^0.6.0 (#534)
- >=0.6.0<0.8.0 (#615)
- 0.6.12 (#1131)
Use one Solidity version.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#293-319) is never used and should be removed
Address.functionCall(address,bytes) (#263-265) is never used and should be removed
Address.functionCall(address,bytes,string) (#267-273) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#275-281) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#283-291) is never used and should be removed
Address.sendValue(address,uint256) (#255-261) is never used and should be removed
Context.__Context_init() (#404-406) is never used and should be removed
Context._msgData() (#416-419) is never used and should be removed
ERC20._burn(address,uint256) (#862-870) is never used and should be removed
Market._nft() (#434) is never used and should be removed
SafeMath.div(uint256,uint256) (#105-107) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#121-127) is never used and should be removed
SafeMath.mod(uint256,uint256) (#141-143) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#157-160) is never used and should be removed
SafeMath.mul(uint256,uint256) (#79-91) is never used and should be removed
SafeMath.sub(uint256,uint256) (#48-50) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.6.0 (#5) allows old versions
Pragma version^0.6.0 (#166) allows old versions
Pragma version>=0.4.24<0.7.0 (#323) allows old versions
Pragma version^0.6.0 (#388) allows old versions
Pragma version^0.6.0 (#534) allows old versions
Pragma version>=0.6.0<0.8.0 (#615) is too complex
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 Address.sendValue(address,uint256) (#255-261):
- (success) = recipient.call{value: amount}() (#259)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#293-319):
- (success,returndata) = target.call{value: weiValue}(data) (#302)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable Initializable.______gap (#382) is not in mixedCase
Function Context.__Context_init() (#404-406) is not in mixedCase
Function Context.__Context_init_unchained() (#408-409) is not in mixedCase
Variable Context.__gap (#421) is not in mixedCase
Function MGAS.Approve(address) (#513-515) is not in mixedCase
Function Ownable.__Ownable_init() (#557-560) is not in mixedCase
Function Ownable.__Ownable_init_unchained() (#562-569) is not in mixedCase
Variable Ownable.__gap (#609) is not in mixedCase
Function ERC20.__ERC20_init(string,string) (#663-666) is not in mixedCase
Function ERC20.__ERC20_init_unchained(string,string) (#668-672) is not in mixedCase
Variable ERC20.__gap (#919) is not in mixedCase
Variable ERC20._balances (#644) is not in mixedCase
Variable ERC20._allowances (#646) is not in mixedCase
Variable ERC20._totalSupply (#648) is not in mixedCase
Variable ERC20._name (#650) is not in mixedCase
Variable ERC20._symbol (#651) is not in mixedCase
Variable ERC20._decimals (#652) is not in mixedCase
Function IUniswapV2Router01.WETH() (#925) is not in mixedCase
Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#1092) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#1093) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#1110) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

owner() should be declared external:
- Ownable.owner() (#575-577)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#594-597)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#603-607)
name() should be declared external:
- ERC20.name() (#677-679)
symbol() should be declared external:
- ERC20.symbol() (#685-687)
decimals() should be declared external:
- ERC20.decimals() (#702-704)
totalSupply() should be declared external:
- ERC20.totalSupply() (#709-711)
balanceOf(address) should be declared external:
- ERC20.balanceOf(address) (#716-718)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#728-731)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#736-738)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#747-750)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#765-769)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#783-786)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#802-805)
initialize() should be declared external:
- MGas.initialize() (#1134-1140)
Use the external attribute for functions never called from the contract.

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Attempt to swap token was unsuccessful. For some reason it is untradeable. If token is not in presale stage and is not traded outside PancakeSwap, then it's a scam

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Average 30d PancakeSwap volume is less than $100. Token is either dead or inactive.

Average 30d number of PancakeSwap swaps is less than 1. Token is either dead or inactive.

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

Average 30d PancakeSwap liquidity is low.

Token is deployed only at one blockchain

Token has only one trading pair

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

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

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Young tokens have high risks of price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank