ZFAI [Zafira] Token

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

ZafiraToken._writeCheckpoint(address,uint32,uint256,uint256) (contracts/ZafiraToken.sol#219-237) uses a dangerous strict equality:
- nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber (contracts/ZafiraToken.sol#229)
Don't use strict equality to determine if an account has enough Ether or tokens.

Additional information: link

BEP20.burn(uint256) (contracts/libs/BEP20.sol#231-237) ignores return value by _balances[address(this)].sub(_amount) (contracts/libs/BEP20.sol#235)
Ensure that all the return values of the function calls are used.

Additional information: link

BEP20._approve(address,address,uint256).owner (contracts/libs/BEP20.sol#250) shadows:
- Ownable.owner() (@pancakeswap/pancake-swap-lib/contracts/access/Ownable.sol#36-38) (function)
Rename the local variables that shadow another component.

Additional information: link

ZafiraToken.delegateBySig(address,uint256,uint256,uint8,bytes32,bytes32) (contracts/ZafiraToken.sol#85-126) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now <= expiry,ZFAI::delegateBySig: signature expired) (contracts/ZafiraToken.sol#124)
Avoid relying on block.timestamp.

Additional information: link

ZafiraToken.getChainId() (contracts/ZafiraToken.sol#244-248) uses assembly
- INLINE ASM (contracts/ZafiraToken.sol#246)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['>=0.4.0', '>=0.6.0', '>=0.6.12', '^0.6.2']
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/GSN/Context.sol#3)
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/access/Ownable.sol#3)
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/math/SafeMath.sol#3)
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/token/BEP20/IBEP20.sol#3)
- ^0.6.2 (@pancakeswap/pancake-swap-lib/contracts/utils/Address.sol#3)
- >=0.6.12 (contracts/ZafiraToken.sol#2)
- >=0.6.0 (contracts/libs/BEP20.sol#7)
Use one Solidity version.

Additional information: link

SafeMath.sqrt(uint256) (@pancakeswap/pancake-swap-lib/contracts/math/SafeMath.sol#177-188) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version>=0.6.0 (contracts/libs/BEP20.sol#7) allows old versions
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._functionCallWithValue(address,bytes,uint256,string) (@pancakeswap/pancake-swap-lib/contracts/utils/Address.sol#134-160):
- (success,returndata) = target.call{value: weiValue}(data) (@pancakeswap/pancake-swap-lib/contracts/utils/Address.sol#143)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable BEP20._totalMinted (contracts/libs/BEP20.sol#64) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (@pancakeswap/pancake-swap-lib/contracts/GSN/Context.sol#25)" inContext (@pancakeswap/pancake-swap-lib/contracts/GSN/Context.sol#15-28)
Remove redundant statements if they congest code but offer no value.

Additional information: link

ZafiraToken.slitherConstructorConstantVariables() (contracts/ZafiraToken.sol#12-250) uses literals with too many digits:
- BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD (contracts/libs/BEP20.sol#59)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

BEP20.marketingAmount (contracts/libs/BEP20.sol#70) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

decreaseAllowance(address,uint256) should be declared external:
- BEP20.decreaseAllowance(address,uint256) (contracts/libs/BEP20.sol#244-247)
Use the external attribute for functions never called from the contract.

Additional information: link

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

Additional information: link

Unable to find token contract audit

Unable to verify token contract address on the website

Unable to find audit link on the website

Unable to find whitepaper link on the website

Unable to find Telegram link on the website

Unable to find Twitter link on the website

Unable to find token on CoinHunt

Additional information: link

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

Young tokens have high risks of price dump / death

Token has relatively low CoinGecko rank