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QDrop [QuizDrop] Token

About QDrop

Listings

Token 11 months
CoinMarketCap 10 months
white paper

A revolutionary play-to-earn quiz game on Bsc and Polygon Chain.
Learn, play and earn.

Social

Laser Scorebeta Last Audit: 12 January 2022

report
Token seems to be a scam (type: rug pull scam).


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.

Additional information: link

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.

Additional information: link

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.

Additional information: link

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.

Additional information: link

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

Additional information: link

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

Holders:


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.


Last post in Twitter was more than 30 days ago


Unable to find Blog account (Reddit or Medium)


Unable to find Youtube account


Unable to find Discord account


BscScan page for the token does not contain additional info: website, socials, description, etc.

Additional information: link


Unable to find token on CoinHunt

Additional information: link


Unable to find code repository for the project


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

Additional information: link


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

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