MGPX [Monster Grand Prix] Token

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

Not a direct threat, but may indicate unreliable intentions of developer. Widespread names (e.g. Elon, King, Moon, Doge) are common among meme-tokens and scams. The allow to gain free hype and attract unexperienced investors.

MGPX.updateWhaletax(uint256) (#1428-1430) should emit an event for:
- whaletax = _whaletax (#1429)
Emit an event for critical parameter changes.

Additional information: link

MGPX.setTaxAddress(address)._taxAddress (#1410) lacks a zero-check on :
- taxAddress = _taxAddress (#1411)
Check that the address is not zero.

Additional information: link

Reentrancy in MGPX.constructor() (#1384-1400):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#1390)
State variables written after the call(s):
- super._approve(address(this),address(uniswapV2Router),~ uint256(0)) (#1393)
- _allowances[owner][spender] = amount (#1304)
- super._mint(_msgSender(),maxSupply) (#1394)
- _balances[account] += amount (#1249)
- super.transfer(marketingAddress,maxSupply.mul(20).div(100)) (#1396)
- _balances[sender] = senderBalance - amount (#1225)
- _balances[recipient] += amount (#1227)
- super.transfer(rewardAddress,maxSupply.mul(40).div(100)) (#1397)
- _balances[sender] = senderBalance - amount (#1225)
- _balances[recipient] += amount (#1227)
- super.transfer(devAddress,maxSupply.mul(10).div(100)) (#1398)
- _balances[sender] = senderBalance - amount (#1225)
- _balances[recipient] += amount (#1227)
- super.transfer(reserveAddress,maxSupply.mul(10).div(100)) (#1399)
- _balances[sender] = senderBalance - amount (#1225)
- _balances[recipient] += amount (#1227)
- super._mint(_msgSender(),maxSupply) (#1394)
- _totalSupply += amount (#1248)
- uniswapV2Router = _uniswapV2Router (#1392)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in MGPX.constructor() (#1384-1400):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#1390)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#1305)
- super._approve(address(this),address(uniswapV2Router),~ uint256(0)) (#1393)
- Transfer(address(0),account,amount) (#1250)
- super._mint(_msgSender(),maxSupply) (#1394)
- Transfer(sender,recipient,amount) (#1229)
- super.transfer(marketingAddress,maxSupply.mul(20).div(100)) (#1396)
- Transfer(sender,recipient,amount) (#1229)
- super.transfer(rewardAddress,maxSupply.mul(40).div(100)) (#1397)
- Transfer(sender,recipient,amount) (#1229)
- super.transfer(reserveAddress,maxSupply.mul(10).div(100)) (#1399)
- Transfer(sender,recipient,amount) (#1229)
- super.transfer(devAddress,maxSupply.mul(10).div(100)) (#1398)
Apply the check-effects-interactions pattern.

Additional information: link

Address.verifyCallResult(bool,bytes,string) (#198-218) uses assembly
- INLINE ASM (#210-213)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['>=0.5.0', '>=0.6.2', '^0.8.0']
- ^0.8.0 (#6)
- >=0.6.2 (#223)
- >=0.6.2 (#321)
- >=0.5.0 (#367)
- >=0.5.0 (#422)
- ^0.8.0 (#445)
- ^0.8.0 (#675)
- ^0.8.0 (#702)
- ^0.8.0 (#780)
- ^0.8.0 (#865)
- ^0.8.0 (#966)
- ^0.8.0 (#996)
- ^0.8.0 (#1352)
Use one Solidity version.

Additional information: link

SafeMath.trySub(uint256,uint256) (#476-481) is never used and should be removed
Remove unused functions.

Additional information: link

solc-0.8.0 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

Low level call in Address.functionDelegateCall(address,bytes,string) (#181-190):
- (success,returndata) = target.delegatecall(data) (#188)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Parameter MGPX.updateWhaletax(uint256)._whaletax (#1428) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable MGPX._transfer(address,address,uint256)._fee_scope_0 (#1468) is too similar to MGPX._transfer(address,address,uint256)._fee_scope_1 (#1472)
Prevent variables from having similar names.

Additional information: link

MGPX.rewardAddress (#1376) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#1188-1196)
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

Unable to find token on CoinGecko

Additional information: link

Unable to find token on CoinMarketCap

Additional information: link

Unable to find token/project description on the website or on BscScan, CoinMarketCap

Unable to find token contract audit

Unable to verify that token and website are owned by the same team (no listings + unable to find contract on website)

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 token on CoinHunt

Additional information: link

Unable to find code repository for the project

Young tokens have high risks of price dump / death

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

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank