MBIRD [MoonBird] Token

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

MoonBird.addLiquidity(uint256,uint256) (contracts/MoonBird.sol#349-362) sends eth to arbitrary user
Dangerous calls:
- swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in MoonBird._transfer(address,address,uint256) (contracts/MoonBird.sol#253-306):
External calls:
- swapAndLiquify(contractTokenBalance) (contracts/MoonBird.sol#280)
- swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
- swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (contracts/MoonBird.sol#340-346)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (contracts/MoonBird.sol#280)
- swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
State variables written after the call(s):
- _transferFromExcluded(sender,recipient,amount) (contracts/MoonBird.sol#294)
- _rOwned[address(this)] = _rOwned[address(this)] + (tLiquidity * currentRate) (contracts/MoonBird.sol#452)
- _rOwned[_charity] = _rOwned[_charity] + (tCharity * currentRate) (contracts/MoonBird.sol#508)
- _rOwned[sender] = _rOwned[sender] - rAmount (contracts/MoonBird.sol#417)
- _rOwned[recipient] = _rOwned[recipient] + rTransferAmount (contracts/MoonBird.sol#418)
- _transferToExcluded(sender,recipient,amount) (contracts/MoonBird.sol#296)
- _rOwned[_charity] = _rOwned[_charity] + (tCharity * currentRate) (contracts/MoonBird.sol#508)
- _rOwned[sender] = _rOwned[sender] - rAmount (contracts/MoonBird.sol#397)
- _rOwned[address(this)] = _rOwned[address(this)] + (tLiquidity * currentRate) (contracts/MoonBird.sol#452)
- _rOwned[recipient] = _rOwned[recipient] + rTransferAmount (contracts/MoonBird.sol#399)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#298)
- _rOwned[sender] = _rOwned[sender] - rAmount (contracts/MoonBird.sol#378)
- _rOwned[address(this)] = _rOwned[address(this)] + (tLiquidity * currentRate) (contracts/MoonBird.sol#452)
- _rOwned[_charity] = _rOwned[_charity] + (tCharity * currentRate) (contracts/MoonBird.sol#508)
- _rOwned[recipient] = _rOwned[recipient] + rTransferAmount (contracts/MoonBird.sol#379)
- _transferBothExcluded(sender,recipient,amount) (contracts/MoonBird.sol#300)
- _rOwned[address(this)] = _rOwned[address(this)] + (tLiquidity * currentRate) (contracts/MoonBird.sol#452)
- _rOwned[_charity] = _rOwned[_charity] + (tCharity * currentRate) (contracts/MoonBird.sol#508)
- _rOwned[sender] = _rOwned[sender] - rAmount (contracts/MoonBird.sol#437)
- _rOwned[recipient] = _rOwned[recipient] + rTransferAmount (contracts/MoonBird.sol#439)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#302)
- _rOwned[sender] = _rOwned[sender] - rAmount (contracts/MoonBird.sol#378)
- _rOwned[address(this)] = _rOwned[address(this)] + (tLiquidity * currentRate) (contracts/MoonBird.sol#452)
- _rOwned[_charity] = _rOwned[_charity] + (tCharity * currentRate) (contracts/MoonBird.sol#508)
- _rOwned[recipient] = _rOwned[recipient] + rTransferAmount (contracts/MoonBird.sol#379)
- _transferFromExcluded(sender,recipient,amount) (contracts/MoonBird.sol#294)
- _rTotal = _rTotal - rFee - rBurn (contracts/MoonBird.sol#443)
- _transferToExcluded(sender,recipient,amount) (contracts/MoonBird.sol#296)
- _rTotal = _rTotal - rFee - rBurn (contracts/MoonBird.sol#443)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#298)
- _rTotal = _rTotal - rFee - rBurn (contracts/MoonBird.sol#443)
- _transferBothExcluded(sender,recipient,amount) (contracts/MoonBird.sol#300)
- _rTotal = _rTotal - rFee - rBurn (contracts/MoonBird.sol#443)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#302)
- _rTotal = _rTotal - rFee - rBurn (contracts/MoonBird.sol#443)
- _transferFromExcluded(sender,recipient,amount) (contracts/MoonBird.sol#294)
- _tOwned[sender] = _tOwned[sender] - tAmount (contracts/MoonBird.sol#416)
- _tOwned[_charity] = _tOwned[_charity] + tCharity (contracts/MoonBird.sol#509)
- _tOwned[address(this)] = _tOwned[address(this)] + tLiquidity (contracts/MoonBird.sol#453)
- _transferToExcluded(sender,recipient,amount) (contracts/MoonBird.sol#296)
- _tOwned[_charity] = _tOwned[_charity] + tCharity (contracts/MoonBird.sol#509)
- _tOwned[recipient] = _tOwned[recipient] + tTransferAmount (contracts/MoonBird.sol#398)
- _tOwned[address(this)] = _tOwned[address(this)] + tLiquidity (contracts/MoonBird.sol#453)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#298)
- _tOwned[_charity] = _tOwned[_charity] + tCharity (contracts/MoonBird.sol#509)
- _tOwned[address(this)] = _tOwned[address(this)] + tLiquidity (contracts/MoonBird.sol#453)
- _transferBothExcluded(sender,recipient,amount) (contracts/MoonBird.sol#300)
- _tOwned[sender] = _tOwned[sender] - tAmount (contracts/MoonBird.sol#436)
- _tOwned[_charity] = _tOwned[_charity] + tCharity (contracts/MoonBird.sol#509)
- _tOwned[address(this)] = _tOwned[address(this)] + tLiquidity (contracts/MoonBird.sol#453)
- _tOwned[recipient] = _tOwned[recipient] + tTransferAmount (contracts/MoonBird.sol#438)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#302)
- _tOwned[_charity] = _tOwned[_charity] + tCharity (contracts/MoonBird.sol#509)
- _tOwned[address(this)] = _tOwned[address(this)] + tLiquidity (contracts/MoonBird.sol#453)
- _transferFromExcluded(sender,recipient,amount) (contracts/MoonBird.sol#294)
- _tTotal = _tTotal - tBurn (contracts/MoonBird.sol#448)
- _transferToExcluded(sender,recipient,amount) (contracts/MoonBird.sol#296)
- _tTotal = _tTotal - tBurn (contracts/MoonBird.sol#448)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#298)
- _tTotal = _tTotal - tBurn (contracts/MoonBird.sol#448)
- _transferBothExcluded(sender,recipient,amount) (contracts/MoonBird.sol#300)
- _tTotal = _tTotal - tBurn (contracts/MoonBird.sol#448)
- _transferStandard(sender,recipient,amount) (contracts/MoonBird.sol#302)
- _tTotal = _tTotal - tBurn (contracts/MoonBird.sol#448)
Apply the check-effects-interactions pattern.

Additional information: link

Combination 1: Reentrancy vulnerabilities + Functions that send Ether to arbitraty destination. Usual for scams. May be justified by some complex mechanics (e.g. rebase, reflections). DYOR & manual audit are advised.

MoonBird.addLiquidity(uint256,uint256) (contracts/MoonBird.sol#349-362) ignores return value by swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
Ensure that all the return values of the function calls are used.

Additional information: link

MoonBird._approve(address,address,uint256).owner (contracts/MoonBird.sol#245) shadows:
- Ownable.owner() (@openzeppelin/contracts/access/Ownable.sol#34-36) (function)
Rename the local variables that shadow another component.

Additional information: link

MoonBird.constructor(address,address).charityAddress (contracts/MoonBird.sol#84) lacks a zero-check on :
- _charity = charityAddress (contracts/MoonBird.sol#102)
Check that the address is not zero.

Additional information: link

Reentrancy in MoonBird.transferFrom(address,address,uint256) (contracts/MoonBird.sol#150-154):
External calls:
- _transfer(sender,recipient,amount) (contracts/MoonBird.sol#151)
- swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
- swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (contracts/MoonBird.sol#340-346)
External calls sending eth:
- _transfer(sender,recipient,amount) (contracts/MoonBird.sol#151)
- swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (contracts/MoonBird.sol#152)
- _allowances[owner][spender] = amount (contracts/MoonBird.sol#249)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in MoonBird.transferFrom(address,address,uint256) (contracts/MoonBird.sol#150-154):
External calls:
- _transfer(sender,recipient,amount) (contracts/MoonBird.sol#151)
- swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
- swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (contracts/MoonBird.sol#340-346)
External calls sending eth:
- _transfer(sender,recipient,amount) (contracts/MoonBird.sol#151)
- swapRouter.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (contracts/MoonBird.sol#354-361)
Event emitted after the call(s):
- Approval(owner,spender,amount) (contracts/MoonBird.sol#250)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()] - amount) (contracts/MoonBird.sol#152)
Apply the check-effects-interactions pattern.

Additional information: link

EnumerableSet.values(EnumerableSet.UintSet) (@openzeppelin/contracts/utils/structs/EnumerableSet.sol#346-355) uses assembly
- INLINE ASM (@openzeppelin/contracts/utils/structs/EnumerableSet.sol#350-352)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['^0.8.0', '^0.8.4']
- ^0.8.0 (@openzeppelin/contracts/access/Ownable.sol#3)
- ^0.8.0 (@openzeppelin/contracts/token/ERC20/IERC20.sol#3)
- ^0.8.0 (@openzeppelin/contracts/utils/Address.sol#3)
- ^0.8.0 (@openzeppelin/contracts/utils/Context.sol#3)
- ^0.8.0 (@openzeppelin/contracts/utils/structs/EnumerableSet.sol#3)
- ^0.8.4 (contracts/Interfaces.sol#2)
- ^0.8.4 (contracts/MoonBird.sol#2)
Use one Solidity version.

Additional information: link

EnumerableSet.values(EnumerableSet.UintSet) (@openzeppelin/contracts/utils/structs/EnumerableSet.sol#346-355) is never used and should be removed
Remove unused functions.

Additional information: link

MoonBird.ORIG_LIQUIDITY_FEE (contracts/MoonBird.sol#62) is set pre-construction with a non-constant function or state variable:
- _LIQUIDITY_FEE
Remove any initialization of state variables via non-constant state variables or function calls. If variables must be set upon contract deployment, locate initialization in the constructor instead.

Additional information: link

solc-0.8.4 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 MoonBird.sweepDustBNB() (contracts/MoonBird.sol#108-113):
- (success) = _msgSender().call{gas: 23000,value: dust}() (contracts/MoonBird.sol#111)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable MoonBird.ORIG_LIQUIDITY_FEE (contracts/MoonBird.sol#62) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable MoonBird._transferBothExcluded(address,address,uint256).rTransferAmount (contracts/MoonBird.sol#423) is too similar to MoonBird._transferFromExcluded(address,address,uint256).tTransferAmount (contracts/MoonBird.sol#405)
Prevent variables from having similar names.

Additional information: link

MoonBird.slitherConstructorVariables() (contracts/MoonBird.sol#22-534) uses literals with too many digits:
- _tTotal = 21000000 * _DECIMALFACTOR (contracts/MoonBird.sol#42)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

updateSwapRouter(address) should be declared external:
- MoonBird.updateSwapRouter(address) (contracts/MoonBird.sol#236-243)
Use the external attribute for functions never called from the contract.

Additional information: link

Average 30d PancakeSwap volume is less than $100. Token is either dead or inactive.

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

Number of Binance Smart Chain (BSC) token holders is low.

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 number of swaps.

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

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 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

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