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EMP [Empiricus] Token

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Token 2 years

Empirícus Token DeFi is a decentralized token. It aims in the medium term to acquire mining rigs using 100% clean energy.

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Laser Scorebeta Last Audit: 30 November 2021

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Token is either risky or in presale. For presale 30+ is a fine score.

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

Empiricus.addLiquidity(uint256,uint256) (#1062-1075) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in Empiricus._transfer(address,address,uint256) (#992-1019):
External calls:
- swapAndLiquify(contractTokenBalance) (#1014)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1053-1059)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1014)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
State variables written after the call(s):
- _tokenTransfer(from,to,amount) (#1018)
- _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity) (#942)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1127)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1118)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1119)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#1138)
- _rOwned[sender] = _rOwned[sender].sub(rAmount) (#883)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1139)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#1129)
- _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount) (#885)
- _tokenTransfer(from,to,amount) (#1018)
- _rTotal = _rTotal.sub(rFee) (#897)
- _tokenTransfer(from,to,amount) (#1018)
- _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity) (#944)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#882)
- _tOwned[sender] = _tOwned[sender].sub(tAmount) (#1137)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#1128)
- _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount) (#884)
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.

Empiricus.addLiquidity(uint256,uint256) (#1062-1075) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
Ensure that all the return values of the function calls are used.

Additional information: link

Empiricus._approve(address,address,uint256).owner (#984) shadows:
- Ownable.owner() (#430-432) (function)
Rename the local variables that shadow another component.

Additional information: link

Empiricus.setBurnFeePercent(uint256) (#1183-1185) should emit an event for:
- _burnFee = burnFee (#1184)
Emit an event for critical parameter changes.

Additional information: link

Empiricus.setcharityWallet(address).newWallet (#1167) lacks a zero-check on :
- charityWallet = newWallet (#1168)
Check that the address is not zero.

Additional information: link

Reentrancy in Empiricus.transferFrom(address,address,uint256) (#807-811):
External calls:
- _transfer(sender,recipient,amount) (#808)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1053-1059)
External calls sending eth:
- _transfer(sender,recipient,amount) (#808)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
State variables written after the call(s):
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#809)
- _allowances[owner][spender] = amount (#988)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in Empiricus.transferFrom(address,address,uint256) (#807-811):
External calls:
- _transfer(sender,recipient,amount) (#808)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1053-1059)
External calls sending eth:
- _transfer(sender,recipient,amount) (#808)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,owner(),block.timestamp) (#1067-1074)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#989)
- _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,ERC20: transfer amount exceeds allowance)) (#809)
Apply the check-effects-interactions pattern.

Additional information: link

Ownable.unlock() (#477-482) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now > _lockTime,Contract is locked until 7 days) (#479)
Avoid relying on block.timestamp.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#375-396) uses assembly
- INLINE ASM (#388-391)
Do not use evm assembly.

Additional information: link

SafeMath.mod(uint256,uint256,string) (#243-246) is never used and should be removed
Remove unused functions.

Additional information: link

Empiricus._previouscharityFee (#730) is set pre-construction with a non-constant function or state variable:
- _charityFee
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

Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#375-396):
- (success,returndata) = target.call{value: weiValue}(data) (#379)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable Empiricus._charityFee (#728) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#255)" inContext (#249-258)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable Empiricus._getRValues(uint256,uint256,uint256,uint256).rTransferAmount (#918) is too similar to Empiricus._transferToExcluded(address,address,uint256).tTransferAmount (#1126)
Prevent variables from having similar names.

Additional information: link

Empiricus.numTokensSellToAddToLiquidity (#738) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

setSwapAndLiquifyEnabled(bool) should be declared external:
- Empiricus.setSwapAndLiquifyEnabled(bool) (#1196-1199)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


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 Twitter account


Unable to find Blog account (Reddit or Medium)


Unable to find Youtube account


Unable to find Discord account


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

Additional information: link


Unable to find token on CoinGecko

Additional information: link


Unable to find token on CoinMarketCap

Additional information: link


Unable to find token/project description on the website or on BscScan, CoinMarketCap


Unable to find token contract audit


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


Unable to find code repository for the project


Young tokens have high risks of scam / price dump / death


Token has no active CoinGecko listing / rank


Token has no active CoinMarketCap listing / rank


Token has a considerable age, but social accounts / website are missing or have few users


Token has a considerable age, but average PancakeSwap 30d trading volume is low


Young tokens have high risks of price dump / death

Price for EMP