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VIKINGS [Moon Vikings BSC] Token

About VIKINGS

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Token 13 months

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Description

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Laser Scorebeta Last Audit: 30 November 2021

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Token seems to be anonymous. As long as we are unable to find website score is limited.

MoonVikingsBSC.addLiquidity(uint256,uint256) (#1014-1029) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in MoonVikingsBSC._transfer(address,address,uint256) (#945-980):
External calls:
- swapAndLiquify(contractTokenBalance) (#967)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1007-1011)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#967)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
State variables written after the call(s):
- _tokenTransfer(from,to,amount,takeFee) (#979)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#901)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1076)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1067)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1068)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#804)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1087)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1088)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1078)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#806)
- _tokenTransfer(from,to,amount,takeFee) (#979)
- _rTotal = _rTotal.sub(rFee) (#854)
- _tokenTransfer(from,to,amount,takeFee) (#979)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#902)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#803)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1086)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1077)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#805)
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.

MoonVikingsBSC.addLiquidity(uint256,uint256) (#1014-1029) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
Ensure that all the return values of the function calls are used.

Additional information: link

MoonVikingsBSC._approve(address,address,uint256).owner (#938) shadows:
- Ownable.owner() (#408-410) (function)
Rename the local variables that shadow another component.

Additional information: link

MoonVikingsBSC.setMaxTxPercent(uint256) (#841-843) should emit an event for:
- _maxTransactionAmount = maxTxPercent * 10 ** _decimals (#842)
Emit an event for critical parameter changes.

Additional information: link

MoonVikingsBSC.setCharityWallet(address).newWallet (#828) lacks a zero-check on :
- _charityWallet = newWallet (#829)
Check that the address is not zero.

Additional information: link

Reentrancy in MoonVikingsBSC.transferFrom(address,address,uint256) (#722-726):
External calls:
- _transfer(sender,recipient,amount) (#723)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1007-1011)
External calls sending eth:
- _transfer(sender,recipient,amount) (#723)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#724)
- _allowances[owner][spender] = amount (#941)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in MoonVikingsBSC.transferFrom(address,address,uint256) (#722-726):
External calls:
- _transfer(sender,recipient,amount) (#723)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1007-1011)
External calls sending eth:
- _transfer(sender,recipient,amount) (#723)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1019-1028)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#942)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#724)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#455-460) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (#457)
Avoid relying on block.timestamp.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#356-384) uses assembly
- INLINE ASM (#377)
Do not use evm assembly.

Additional information: link

SafeMath.mod(uint256,uint256,string) (#220-223) is never used and should be removed
Remove unused functions.

Additional information: link

Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#356-384):
- (success,returndata) = target.call{value: weiValue}(data) (#360-364)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable MoonVikingsBSC._maxTransactionAmount (#643) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#232)" inContext (#226-235)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable MoonVikingsBSC.reflectionFromToken(uint256,bool).rTransferAmount (#764) is too similar to MoonVikingsBSC._transferStandard(address,address,uint256).tTransferAmount (#1066)
Prevent variables from having similar names.

Additional information: link

setRouterAddress(address) should be declared external:
- MoonVikingsBSC.setRouterAddress(address) (#1095-1099)
Use the external attribute for functions never called from the contract.

Additional information: link


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.


Not a direct threat, but may indicate unreliable intentions of developer. Both name and ticker of current token are widespread, i.e. common across multiple tokens. This is slightly suspicious

Holders:


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 Telegram and Twitter accounts


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

Price for VIKINGS