DZOO [DogeZoo] Token

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

DogeZoo.addLiquidity(uint256,uint256) (#837-847) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in DogeZoo._transfer(address,address,uint256) (#776-811):
External calls:
- swapAndLiquify(contractTokenBalance) (#802)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#828-834)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#802)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#810)
- _rOwned[_devWalletAddress] = _rOwned[_devWalletAddress].add(rDev) (#725)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#717)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#881)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#871)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#623)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#893)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#872)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#894)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#883)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#625)
- _tokenTransfer(from,to,amount,takeFee) (#810)
- _rTotal = _rTotal.sub(rFee) (#670)
- _tokenTransfer(from,to,amount,takeFee) (#810)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#719)
- _tOwned[_devWalletAddress] = _tOwned[_devWalletAddress].add(tDev) (#727)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#892)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#622)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#882)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#624)
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.

DogeZoo.constructor(string,string,uint256,uint256,uint256,uint256,uint256,address,address,address,address) (#476-512) performs a multiplication on the result of a division:
-numTokensSellToAddToLiquidity = (_tTotal * 5 / 10000) * 10 ** _decimals (#490)
Consider ordering multiplication before division.

Additional information: link

DogeZoo.addLiquidity(uint256,uint256) (#837-847) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
Ensure that all the return values of the function calls are used.

Additional information: link

DogeZoo._approve(address,address,uint256).owner (#768) shadows:
- Ownable.owner() (#204-206) (function)
Rename the local variables that shadow another component.

Additional information: link

DogeZoo.setNumTokensSellToAddToLiquidity(uint256) (#908-910) should emit an event for:
- numTokensSellToAddToLiquidity = amountToUpdate (#909)
Emit an event for critical parameter changes.

Additional information: link

DogeZoo.setDevWalletAddress(address)._addr (#656) lacks a zero-check on :
- _devWalletAddress = _addr (#657)
Check that the address is not zero.

Additional information: link

Reentrancy in DogeZoo.transferFrom(address,address,uint256) (#549-553):
External calls:
- _transfer(sender,recipient,amount) (#550)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#828-834)
External calls sending eth:
- _transfer(sender,recipient,amount) (#550)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#551)
- _allowances[owner][spender] = amount (#772)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in DogeZoo.transferFrom(address,address,uint256) (#549-553):
External calls:
- _transfer(sender,recipient,amount) (#550)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#828-834)
External calls sending eth:
- _transfer(sender,recipient,amount) (#550)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#839-846)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#773)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#551)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#235-240) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(block.timestamp > _lockTime,Contract is locked.) (#237)
Avoid relying on block.timestamp.

Additional information: link

Address._verifyCallResult(bool,bytes,string) (#175-188) uses assembly
- INLINE ASM (#180-183)
Do not use evm assembly.

Additional information: link

SafeMath.trySub(uint256,uint256) (#28-33) is never used and should be removed
Remove unused functions.

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 Address.functionDelegateCall(address,bytes,string) (#169-173):
- (success,returndata) = target.delegatecall(data) (#171)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable DogeZoo._maxTxAmount (#460) is not in mixedCase
Follow the Solidity naming convention.

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Redundant expression "this (#115)" inContext (#109-118)
Remove redundant statements if they congest code but offer no value.

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Reentrancy in DogeZoo.constructor(string,string,uint256,uint256,uint256,uint256,uint256,address,address,address,address) (#476-512):
External calls:
- address(service).transfer(msg.value) (#508)
Event emitted after the call(s):
- Transfer(address(0),tokenOwner,_tTotal) (#509)
Apply the check-effects-interactions pattern.

Additional information: link

Variable DogeZoo._transferFromExcluded(address,address,uint256).rTransferAmount (#891) is too similar to DogeZoo._transferToExcluded(address,address,uint256).tTransferAmount (#880)
Prevent variables from having similar names.

Additional information: link

isExcludedFromFee(address) should be declared external:
- DogeZoo.isExcludedFromFee(address) (#764-766)
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.

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

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

Additional information: link

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank

Young tokens have high risks of price dump / death