NFTart [HalloweenNFTart] Token

HalloweenNFTart.addLiquidity(uint256,uint256) (#723-736) sends eth to arbitrary user
Dangerous calls:
- _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in HalloweenNFTart._transfer(address,address,uint256) (#632-681):
External calls:
- swapAndLiquify(contractTokenBalance) (#671)
- _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#715-721)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#671)
- _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#680)
- _rOwned[to] = _rOwned[to].add(rAmount) (#903)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#812)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#793)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#776)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#832)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#777)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#833)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#814)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#795)
- _tokenTransfer(from,to,amount,takeFee) (#680)
- _rTotal = _rTotal.sub(rFee) (#841)
- _tokenTransfer(from,to,amount,takeFee) (#680)
- _tOwned[to] = _tOwned[to].add(tAmount) (#905)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#792)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#831)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#813)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#794)
Apply the check-effects-interactions pattern.

Additional information: link

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

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.

HalloweenNFTart.reflectionFromToken(uint256,bool).tMarketing_scope_2 (#551) 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

HalloweenNFTart.addLiquidity(uint256,uint256) (#723-736) ignores return value by _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
Ensure that all the return values of the function calls are used.

Additional information: link

HalloweenNFTart._approve(address,address,uint256).owner (#485) shadows:
- Ownable.owner() (#136-138) (function)
Rename the local variables that shadow another component.

Additional information: link

HalloweenNFTart.setMinLiquidityPercent(uint256) (#601-605) should emit an event for:
- _numTokensSellToAddToLiquidity = _tTotal.mul(minLiquidityPercent).div(100) (#603-604)
Emit an event for critical parameter changes.

Additional information: link

HalloweenNFTart.setUniswapPair(address).p (#627) lacks a zero-check on :
- _uniswapV2Pair = p (#628)
Check that the address is not zero.

Additional information: link

Variable 'HalloweenNFTart.reflectionFromToken(uint256,bool).tLiquidity (#542)' in HalloweenNFTart.reflectionFromToken(uint256,bool) (#537-559) potentially used before declaration: (tFee,tLiquidity,tMarketing) = _getTValues(tAmount) (#551-552)
Move all variable declarations prior to any usage of the variable, and ensure that reaching a variable declaration does not depend on some conditional if it is used unconditionally.

Additional information: link

Reentrancy in HalloweenNFTart.transferFrom(address,address,uint256) (#492-497):
External calls:
- _transfer(sender,recipient,amount) (#494)
- _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#715-721)
External calls sending eth:
- _transfer(sender,recipient,amount) (#494)
- _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,BEP20: transfer amount exceeds allowance)) (#495)
- _allowances[owner][spender] = amount (#489)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in HalloweenNFTart.transferFrom(address,address,uint256) (#492-497):
External calls:
- _transfer(sender,recipient,amount) (#494)
- _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
- _uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#715-721)
External calls sending eth:
- _transfer(sender,recipient,amount) (#494)
- _uniswapV2Router.addLiquidityETH{value: bnbAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#728-735)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#490)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,BEP20: transfer amount exceeds allowance)) (#495)
Apply the check-effects-interactions pattern.

Additional information: link

SafeMath.mod(uint256,uint256,string) (#114-118) is never used and should be removed
Remove unused functions.

Additional information: link

HalloweenNFTart._previousMarketingFee (#406) is set pre-construction with a non-constant function or state variable:
- _marketingFee
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.

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Variable HalloweenNFTart._uniswapV2Pair (#415) is not in mixedCase
Follow the Solidity naming convention.

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Redundant expression "this (#46)" inContext (#40-50)
Remove redundant statements if they congest code but offer no value.

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Variable HalloweenNFTart._transferToExcluded(address,address,uint256).rTransferAmount (#807) is too similar to HalloweenNFTart._transferFromExcluded(address,address,uint256).tTransferAmount (#823)
Prevent variables from having similar names.

Additional information: link

HalloweenNFTart.slitherConstructorVariables() (#376-909) uses literals with too many digits:
- _numTokensSellToAddToLiquidity = 4000000000000 * 10 ** 9 (#409)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

Ownable._previousOwner (#123) is never used in HalloweenNFTart (#376-909)
Remove unused state variables.

Additional information: link

Ownable._previousOwner (#123) should be constant
Add the constant attributes to state variables that never change.

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isExcludedFromReward(address) should be declared external:
- HalloweenNFTart.isExcludedFromReward(address) (#613-615)
Use the external attribute for functions never called from the contract.

Additional information: link

Number of Binance Smart Chain (BSC) token holders is less than 100. Token is either dead or inactive. Ignore for presale.

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

Young tokens have high risks of price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank