METAFOUR [META FOUR] Token

Token is flagged by TokenSniffer due to presence of exploit in contract code

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

Contract locking ether found:
Contract METAFOUR (#239-256) has payable functions:
- METAFOUR.fallback() (#252-254)
But does not have a function to withdraw the ether
Remove the payable attribute or add a withdraw function.

Additional information: link

Contract ownership is not renounced (belongs to a wallet)

BaseToken.setProjectAddress(address)._projectAddress (#224) lacks a zero-check on :
- projectAddress = _projectAddress (#225)
Check that the address is not zero.

Additional information: link

BaseToken.burnAddress (#87) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

BaseToken.setTaxFee(uint256) (#228-230) should emit an event for:
- _taxFee = taxFee (#229)
BaseToken.setBurnFee(uint256) (#232-234) should emit an event for:
- _burnFee = burnFee (#233)
Emit an event for critical parameter changes.

Additional information: link

SafeMath.mod(uint256,uint256) (#32-35) is never used and should be removed
Remove unused functions.

Additional information: link

BaseToken._previousTaxFee (#80) is set pre-construction with a non-constant function or state variable:
- _taxFee
BaseToken._previousBurnFee (#83) is set pre-construction with a non-constant function or state variable:
- _burnFee
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

Pragma version^0.4.25 (#1) allows old versions
solc-0.4.25 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.

Additional information: link

Parameter BaseToken.calculateTaxFee(uint256)._amount (#168) is not in mixedCase
Parameter BaseToken.calculateBurnFee(uint256)._amount (#174) is not in mixedCase
Parameter BaseToken.setProjectAddress(address)._projectAddress (#224) is not in mixedCase
Constant BaseToken.MAXSupply (#69) is not in UPPER_CASE_WITH_UNDERSCORES
Variable BaseToken._taxFee (#79) is not in mixedCase
Variable BaseToken._burnFee (#82) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

METAFOUR.slitherConstructorVariables() (#239-256) uses literals with too many digits:
- totalSupply = 1000000000000 * 10 ** uint256(decimals) (#68)
METAFOUR.slitherConstructorVariables() (#239-256) uses literals with too many digits:
- burnAddress = 0x000000000000000000000000000000000000dEaD (#87)
METAFOUR.slitherConstructorConstantVariables() (#239-256) uses literals with too many digits:
- MAXSupply = 10000000000000000000000000000000000000 * 10 ** uint256(decimals) (#69)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#48-52)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#54-57)
transfer(address,uint256) should be declared external:
- BaseToken.transfer(address,uint256) (#126-129)
transferFrom(address,address,uint256) should be declared external:
- BaseToken.transferFrom(address,address,uint256) (#131-135)
approve(address,uint256) should be declared external:
- BaseToken.approve(address,uint256) (#137-142)
increaseAllowance(address,uint256) should be declared external:
- BaseToken.increaseAllowance(address,uint256) (#144-149)
decreaseAllowance(address,uint256) should be declared external:
- BaseToken.decreaseAllowance(address,uint256) (#151-156)
mintToken(address,uint256) should be declared external:
- BaseToken.mintToken(address,uint256) (#158-166)
includeInFee(address) should be declared external:
- BaseToken.includeInFee(address) (#199-201)
isExcludeFromFee(address) should be declared external:
- BaseToken.isExcludeFromFee(address) (#203-206)
setLocked(address) should be declared external:
- BaseToken.setLocked(address) (#209-211)
setUnlocked(address) should be declared external:
- BaseToken.setUnlocked(address) (#213-215)
isLocked(address) should be declared external:
- BaseToken.isLocked(address) (#218-221)
setProjectAddress(address) should be declared external:
- BaseToken.setProjectAddress(address) (#224-226)
setTaxFee(uint256) should be declared external:
- BaseToken.setTaxFee(uint256) (#228-230)
setBurnFee(uint256) should be declared external:
- BaseToken.setBurnFee(uint256) (#232-234)
fallback() should be declared external:
- METAFOUR.fallback() (#252-254)
Use the external attribute for functions never called from the contract.

Additional information: link

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

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.

Number of Binance Smart Chain (BSC) token holders is less than 100. Token is either dead or inactive. Ignore for presale.

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

Contract has 8% buy tax and 0% sell tax.
Taxes are low but contract ownership is not renounced. Token has a high risk of becoming a honeypot.

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.)

Additional information: link

Young tokens have high risks of price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank