QDrop [QuizDrop] Token

Contract creator or owner is blacklisted for past scams

Unable to verify that contract auditor is trusted: Certik, Quantstamp, Hacken, Solidity, Paladinsec, Openzeppelin, Verichains

QuizDrop.setFeePercentage(uint8) (#395-400) contains a tautology or contradiction:
- require(bool,string)(feePercentage_ >= 0,QuizDrop: transaction fee percentage equals 0) (#397)
Fix the incorrect comparison by changing the value type or the comparison.

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QuizDrop.setBotProtectionDisableForever() (#382-385) compares to a boolean constant:
-require(bool)(BPDisabledForever == false) (#383)
Remove the equality to the boolean constant.

Additional information: link

QuizDrop._transfer(address,address,uint256) (#434-467) uses tx.origin for authorization: require(bool,string)(! isBlacklisted[tx.origin],QuizDrop: transfer called from blacklisted address) (#443)
Do not use tx.origin for authorization.

Additional information: link

QuizDrop.allowance(address,address).owner (#430) shadows:
- Ownable.owner() (#235-237) (function)
QuizDrop._approve(address,address,uint256).owner (#483) shadows:
- Ownable.owner() (#235-237) (function)
Rename the local variables that shadow another component.

Additional information: link

QuizDrop.constructor(address).beneficiaryAddress_ (#311) lacks a zero-check on :
- beneficiaryAddress = beneficiaryAddress_ (#312)
QuizDrop.setBeneficiaryAddress(address).beneficiaryAddress_ (#402) lacks a zero-check on :
- beneficiaryAddress = beneficiaryAddress_ (#403)
Check that the address is not zero.

Additional information: link

Reentrancy in QuizDrop._transfer(address,address,uint256) (#434-467):
External calls:
- BP.protect(sender,recipient,amount) (#446)
State variables written after the call(s):
- _balances[sender] = senderBalance - amount (#452)
- _balances[recipient] += receiveAmount (#457)
- _balances[beneficiaryAddress] += feeAmount (#461)
- _balances[recipient] += receiveAmount (#462)
Reentrancy in QuizDrop.transferFrom(address,address,uint256) (#341-355):
External calls:
- _transfer(sender,recipient,amount) (#346)
- BP.protect(sender,recipient,amount) (#446)
State variables written after the call(s):
- _approve(sender,_msgSender(),currentAllowance - amount) (#351)
- _allowances[owner][spender] = amount (#490)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in QuizDrop._transfer(address,address,uint256) (#434-467):
External calls:
- BP.protect(sender,recipient,amount) (#446)
Event emitted after the call(s):
- Transfer(sender,recipient,receiveAmount) (#466)
- TransferFee(sender,beneficiaryAddress,feeAmount) (#463)
Reentrancy in QuizDrop.transferFrom(address,address,uint256) (#341-355):
External calls:
- _transfer(sender,recipient,amount) (#346)
- BP.protect(sender,recipient,amount) (#446)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#491)
- _approve(sender,_msgSender(),currentAllowance - amount) (#351)
Apply the check-effects-interactions pattern.

Additional information: link

Context._msgData() (#101-104) is never used and should be removed
Remove unused functions.

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Pragma version^0.8.0 (#3) allows old versions
Pragma version^0.8.0 (#84) allows old versions
Pragma version^0.8.0 (#112) allows old versions
Pragma version^0.8.0 (#204) allows old versions
Pragma version^0.8.0 (#274) allows old versions
solc-0.8.9 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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Parameter QuizDrop.setBPAddrss(address)._bp (#373) is not in mixedCase
Parameter QuizDrop.setBpEnabled(bool)._enabled (#378) is not in mixedCase
Variable QuizDrop.BP (#303) is not in mixedCase
Variable QuizDrop.BPDisabledForever (#305) is not in mixedCase
Follow the Solidity naming convention.

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Redundant expression "this (#102)" inContext (#96-105)
Remove redundant statements if they congest code but offer no value.

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renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#254-257)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#263-267)
Use the external attribute for functions never called from the contract.

Additional information: link

Average 30d PancakeSwap volume is low.

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

Unable to find PancakeSwap trading pair to compute liquidity.

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.

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Unable to find token on CoinHunt

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Unable to find code repository for the project

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

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Young tokens have high risks of price dump / death

Young tokens have high risks of scam / price dump / death

Young tokens have high risks of price dump / death

Young tokens have high risks of price dump / death

Token has relatively low CoinGecko rank

Token has relatively low CoinMarketCap rank