MetaDogeCat [Meta Doge Cat] Token

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

MetaDogeCat.rescueBEP20Tokens(address) (#822-824) ignores return value by IERC20(tokenAddress).transfer(msg.sender,IERC20(tokenAddress).balanceOf(address(this))) (#823)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

MetaDogeCat.addLiquidity(uint256,uint256) (#758-771) sends eth to arbitrary user
Dangerous calls:
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in MetaDogeCat._transfer(address,address,uint256) (#661-683):
External calls:
- buyBackTokens(balance.div(100)) (#674)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#724-729)
- swapAndLiquify(swapTokensAtAmount) (#677)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#782-788)
External calls sending eth:
- buyBackTokens(balance.div(100)) (#674)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#724-729)
- swapAndLiquify(swapTokensAtAmount) (#677)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
- address(operationsAddress).transfer(operationsAmt) (#754)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,! (_isExcludedFromFee[from] || _isExcludedFromFee[to]),isSale) (#682)
- _rOwned[address(this)] += rOperations (#554)
- _rOwned[marketingAddress] += rMarketing (#585)
- _rOwned[address(this)] += rLiquidity (#575)
- _rOwned[address(this)] += rBuyback (#565)
- _rOwned[sender] = _rOwned[sender] - s.rAmount (#698)
- _rOwned[recipient] = _rOwned[recipient] + s.rTransferAmount (#699)
- _tokenTransfer(from,to,amount,! (_isExcludedFromFee[from] || _isExcludedFromFee[to]),isSale) (#682)
- _rTotal -= rRfi (#545)
- _tokenTransfer(from,to,amount,! (_isExcludedFromFee[from] || _isExcludedFromFee[to]),isSale) (#682)
- _tOwned[address(this)] += tBuyback (#563)
- _tOwned[sender] = _tOwned[sender] - tAmount (#692)
- _tOwned[address(this)] += tOperations (#552)
- _tOwned[marketingAddress] += tMarketing (#583)
- _tOwned[address(this)] += tLiquidity (#573)
- _tOwned[recipient] = _tOwned[recipient] + s.tTransferAmount (#695)
- swapAndLiquify(swapTokensAtAmount) (#677)
- isAction = true (#402)
- isAction = false (#404)
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.

Combination 2: Unchecked transfer + 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.

Combination 3: Reentrancy vulnerabilities + Unchecked transfer vulnerability. Usual for scams. May be justified by some complex mechanics (e.g. rebase, reflections). DYOR & manual audit are advised.

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.

MetaDogeCat.swapAndLiquify(uint256) (#732-756) performs a multiplication on the result of a division:
-unitBalance = deltaBalance / (denominator - feeRates.liquidity) (#743)
-operationsAmt = unitBalance * 2 * feeRates.operations (#752)
Consider ordering multiplication before division.

Additional information: link

Reentrancy in MetaDogeCat.setRouterAddress(address) (#827-838):
External calls:
- pair = IFactory(_newRouter.factory()).createPair(address(this),_newRouter.WETH()) (#832)
State variables written after the call(s):
- router = _newRouter (#837)
Apply the check-effects-interactions pattern.

Additional information: link

MetaDogeCat._transfer(address,address,uint256).isSale (#679) is a local variable never initialized
Initialize all the variables. If a variable is meant to be initialized to zero, explicitly set it to zero to improve code readability.

Additional information: link

MetaDogeCat.addLiquidity(uint256,uint256) (#758-771) ignores return value by router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
Ensure that all the return values of the function calls are used.

Additional information: link

MetaDogeCat._approve(address,address,uint256).owner (#654) shadows:
- Ownable.owner() (#253-255) (function)
Rename the local variables that shadow another component.

Additional information: link

MetaDogeCat.setBuybackUpperLimit(uint256) (#812-814) should emit an event for:
- buyBackUpperLimit = buyBackLimit * 10 ** _decimals (#813)
Emit an event for critical parameter changes.

Additional information: link

MetaDogeCat.constructor(address)._pair (#409-410) lacks a zero-check on :
- pair = _pair (#413)
Check that the address is not zero.

Additional information: link

Reentrancy in MetaDogeCat.transferFrom(address,address,uint256) (#460-464):
External calls:
- _transfer(sender,recipient,amount) (#461)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#724-729)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#782-788)
External calls sending eth:
- _transfer(sender,recipient,amount) (#461)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#724-729)
- address(operationsAddress).transfer(operationsAmt) (#754)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#462)
- _allowances[owner][spender] = amount (#657)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in MetaDogeCat.transferFrom(address,address,uint256) (#460-464):
External calls:
- _transfer(sender,recipient,amount) (#461)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#724-729)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#782-788)
External calls sending eth:
- _transfer(sender,recipient,amount) (#461)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#724-729)
- address(operationsAddress).transfer(operationsAmt) (#754)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#658)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#462)
Apply the check-effects-interactions pattern.

Additional information: link

Address._verifyCallResult(bool,bytes,string) (#222-240) uses assembly
- INLINE ASM (#232-235)
Do not use evm assembly.

Additional information: link

SafeMath.trySub(uint256,uint256) (#44-49) is never used and should be removed
Remove unused functions.

Additional information: link

MetaDogeCat._rTotal (#335) is set pre-construction with a non-constant function or state variable:
- (MAX - (MAX % _tTotal))
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-0.8.9 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

Low level call in Address.functionDelegateCall(address,bytes,string) (#211-220):
- (success,returndata) = target.delegatecall(data) (#218)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Constant MetaDogeCat._symbol (#345) is not in UPPER_CASE_WITH_UNDERSCORES
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#135)" inContext (#129-139)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Reentrancy in MetaDogeCat.transferFrom(address,address,uint256) (#460-464):
External calls:
- _transfer(sender,recipient,amount) (#461)
- address(operationsAddress).transfer(operationsAmt) (#754)
External calls sending eth:
- _transfer(sender,recipient,amount) (#461)
- router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#763-770)
- router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(0,path,deadAddress,block.timestamp.add(300)) (#724-729)
- address(operationsAddress).transfer(operationsAmt) (#754)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#462)
- _allowances[owner][spender] = amount (#657)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#658)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#462)
Apply the check-effects-interactions pattern.

Additional information: link

Variable MetaDogeCat._getRValues(MetaDogeCat.valuesFromGetValues,uint256,bool,uint256).rOperations (#621) is too similar to MetaDogeCat._takeOperations(uint256,uint256).tOperations (#549)
Prevent variables from having similar names.

Additional information: link

MetaDogeCat.slitherConstructorConstantVariables() (#313-843) uses literals with too many digits:
- deadAddress = 0x000000000000000000000000000000000000dEaD (#342)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

MetaDogeCat._tTotal (#334) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

isExcludedFromFee(address) should be declared external:
- MetaDogeCat.isExcludedFromFee(address) (#540-542)
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.

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 volume.

Unable to find PancakeSwap trading pair to compute number of swaps.

Unable to find website, listings and other project-related information

Young tokens have high risks of price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank