ZBTC [Bitcoinz] Token

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

Contract ownership is not renounced (belongs to a wallet)

Bitcoinz.clear(uint256)._owner (#724) shadows:
- Ownable._owner (#599) (state variable)
Rename the local variables that shadow another component.

Additional information: link

Bitcoinz.startAirdrop(uint256,uint256,uint256,uint256) (#706-712) should emit an event for:
- aSBlock = _aSBlock (#707)
- aEBlock = _aEBlock (#708)
- aAmt = _aAmt (#709)
- aCap = _aCap (#710)
Bitcoinz.startSale(uint256,uint256,uint256,uint256,uint256) (#713-720) should emit an event for:
- sSBlock = _sSBlock (#714)
- sEBlock = _sEBlock (#715)
- sChunk = _sChunk (#716)
- sPrice = _sPrice (#717)
- sCap = _sCap (#718)
Emit an event for critical parameter changes.

Additional information: link

Bitcoinz.clear(uint256)._owner (#724) lacks a zero-check on :
- _owner.transfer(amount) (#725)
Check that the address is not zero.

Additional information: link

Different versions of Solidity is used:
- Version used: ['^0.8.0', '^0.8.4']
- ^0.8.4 (#12)
- ^0.8.0 (#91)
- ^0.8.0 (#120)
- ^0.8.0 (#146)
- ^0.8.0 (#450)
- ^0.8.0 (#492)
- ^0.8.0 (#584)
- ^0.8.0 (#650)
Use one Solidity version.

Additional information: link

Context._msgData() (#137-140) is never used and should be removed
Pausable._pause() (#562-565) is never used and should be removed
Pausable._unpause() (#574-577) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.8.0 (#91) allows old versions
Pragma version^0.8.0 (#120) allows old versions
Pragma version^0.8.0 (#146) allows old versions
Pragma version^0.8.0 (#450) allows old versions
Pragma version^0.8.0 (#492) allows old versions
Pragma version^0.8.0 (#584) allows old versions
Pragma version^0.8.0 (#650) 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

Parameter Bitcoinz.getAirdrop(address)._refer (#672) is not in mixedCase
Parameter Bitcoinz.tokenSale(address)._refer (#683) is not in mixedCase
Parameter Bitcoinz.startAirdrop(uint256,uint256,uint256,uint256)._aSBlock (#706) is not in mixedCase
Parameter Bitcoinz.startAirdrop(uint256,uint256,uint256,uint256)._aEBlock (#706) is not in mixedCase
Parameter Bitcoinz.startAirdrop(uint256,uint256,uint256,uint256)._aAmt (#706) is not in mixedCase
Parameter Bitcoinz.startAirdrop(uint256,uint256,uint256,uint256)._aCap (#706) is not in mixedCase
Parameter Bitcoinz.startSale(uint256,uint256,uint256,uint256,uint256)._sSBlock (#713) is not in mixedCase
Parameter Bitcoinz.startSale(uint256,uint256,uint256,uint256,uint256)._sEBlock (#713) is not in mixedCase
Parameter Bitcoinz.startSale(uint256,uint256,uint256,uint256,uint256)._sChunk (#713) is not in mixedCase
Parameter Bitcoinz.startSale(uint256,uint256,uint256,uint256,uint256)._sPrice (#713) is not in mixedCase
Parameter Bitcoinz.startSale(uint256,uint256,uint256,uint256,uint256)._sCap (#713) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#138)" inContext (#132-141)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Bitcoinz.constructor() (#663-668) uses literals with too many digits:
- startSale(block.number,999999999,0,680000 * 10 ** decimals(),2000000000000) (#666)
Bitcoinz.constructor() (#663-668) uses literals with too many digits:
- startAirdrop(block.number,999999999,68 * 10 ** decimals(),2000000000000) (#667)
Bitcoinz.getAirdrop(address) (#672-681) uses literals with too many digits:
- msg.sender != _refer && balanceOf(_refer) != 0 && _refer != 0x0000000000000000000000000000000000000000 (#676)
Bitcoinz.tokenSale(address) (#683-697) uses literals with too many digits:
- msg.sender != _refer && balanceOf(_refer) != 0 && _refer != 0x0000000000000000000000000000000000000000 (#690)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

name() should be declared external:
- ERC20.name() (#200-202)
symbol() should be declared external:
- ERC20.symbol() (#208-210)
totalSupply() should be declared external:
- ERC20.totalSupply() (#232-234)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#251-254)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#270-273)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#288-296)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#310-313)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#329-335)
burn(uint256) should be declared external:
- ERC20Burnable.burn(uint256) (#465-467)
burnFrom(address,uint256) should be declared external:
- ERC20Burnable.burnFrom(address,uint256) (#480-485)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#634-637)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#643-647)
getAirdrop(address) should be declared external:
- Bitcoinz.getAirdrop(address) (#672-681)
tokenSale(address) should be declared external:
- Bitcoinz.tokenSale(address) (#683-697)
viewAirdrop() should be declared external:
- Bitcoinz.viewAirdrop() (#699-701)
viewSale() should be declared external:
- Bitcoinz.viewSale() (#702-704)
clear(uint256) should be declared external:
- Bitcoinz.clear(uint256) (#723-726)
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.

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 website, listings and other project-related information

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