ALTB [Altbase] Token

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

Altbase._totalSupply (#1053) shadows:
- ERC20._totalSupply (#560)
Remove the state variable shadowing.

Additional information: link

Altbase._minimumSupply (#1054) is never initialized. It is used in:
- Altbase.minimumSupply() (#1113-1115)
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

Reentrancy in Altbase._transfer(address,address,uint256) (#1124-1192):
External calls:
- swapAndLiquify(contractTokenBalance) (#1146)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1227-1233)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1146)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
State variables written after the call(s):
- super._transfer(from,address(this),tokensToLock) (#1180)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#733)
- _balances[recipient] = _balances[recipient].add(amount) (#734)
- _burn(from,burnAmount) (#1181)
- _balances[account] = _balances[account].sub(amount,ERC20: burn amount exceeds balance) (#773)
- super._transfer(from,_manualBurnWallet,manualBurn) (#1182)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#733)
- _balances[recipient] = _balances[recipient].add(amount) (#734)
- super._transfer(from,_devWallet,devAmount) (#1183)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#733)
- _balances[recipient] = _balances[recipient].add(amount) (#734)
- super._transfer(from,to,tokensToTransfer) (#1186)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#733)
- _balances[recipient] = _balances[recipient].add(amount) (#734)
- super._transfer(from,to,amount) (#1188)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#733)
- _balances[recipient] = _balances[recipient].add(amount) (#734)
Apply the check-effects-interactions pattern.

Additional information: link

Altbase.burnLiq(address,address,uint256) (#1320-1327) ignores return value by token.transfer(_burnPool,_amount) (#1326)
Altbase.withdrawAnyToken(address,address,uint256) (#1349-1354) ignores return value by IERC20(_ERC20address).transfer(_recipient,_amount) (#1352)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

Contract ownership is not renounced (belongs to a wallet)

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.

Altbase._balanceOfLpTokens (#1057) should be constant
Altbase._burnPool (#1041) should be constant
Altbase._feesDisabled (#1067) should be constant
Altbase._minimumSupply (#1054) should be constant
Altbase._totalBurnedTokens (#1055) should be constant
Altbase._totalSupply (#1053) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

owner() should be declared external:
- Ownable.owner() (#95-97)
renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#114-117)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#123-127)
name() should be declared external:
- ERC20.name() (#584-586)
symbol() should be declared external:
- ERC20.symbol() (#592-594)
decimals() should be declared external:
- ERC20.decimals() (#609-611)
totalSupply() should be declared external:
- ERC20.totalSupply() (#616-618)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#635-638)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#643-645)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#654-657)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#671-675)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#689-692)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#708-711)
setFeeDecimals(uint8) should be declared external:
- Altbase.setFeeDecimals(uint8) (#1271-1276)
setLiquidityFee(uint32) should be declared external:
- Altbase.setLiquidityFee(uint32) (#1277-1282)
setDevFee(uint32) should be declared external:
- Altbase.setDevFee(uint32) (#1284-1289)
setAutoBurnFee(uint32) should be declared external:
- Altbase.setAutoBurnFee(uint32) (#1290-1295)
setManualBurnFee(uint32) should be declared external:
- Altbase.setManualBurnFee(uint32) (#1296-1301)
updateMinTokensBeforeSwap(uint128) should be declared external:
- Altbase.updateMinTokensBeforeSwap(uint128) (#1303-1309)
updateSwapAndLiquifyEnabled(bool) should be declared external:
- Altbase.updateSwapAndLiquifyEnabled(bool) (#1311-1314)
burn(uint256) should be declared external:
- Altbase.burn(uint256) (#1316-1318)
burnLiq(address,address,uint256) should be declared external:
- Altbase.burnLiq(address,address,uint256) (#1320-1327)
blacklistAddress(address,bool) should be declared external:
- Altbase.blacklistAddress(address,bool) (#1333-1335)
changePauseState(bool) should be declared external:
- Altbase.changePauseState(bool) (#1337-1339)
changeDevWallet(address) should be declared external:
- Altbase.changeDevWallet(address) (#1341-1343)
changeManualBurnWallet(address) should be declared external:
- Altbase.changeManualBurnWallet(address) (#1345-1347)
withdrawAnyToken(address,address,uint256) should be declared external:
- Altbase.withdrawAnyToken(address,address,uint256) (#1349-1354)
transferXS() should be declared external:
- Altbase.transferXS() (#1356-1358)
Use the external attribute for functions never called from the contract.

Additional information: link

Altbase.slitherConstructorVariables() (#1024-1361) uses literals with too many digits:
- _burnPool = 0x0000000000000000000000000000000000000000 (#1041)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

Altbase._totalSupply (#1053) is never used in Altbase (#1024-1361)
Remove unused state variables.

Additional information: link

Altbase.addLiquidity(uint256,uint256) (#1236-1249) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
Ensure that all the return values of the function calls are used.

Additional information: link

ERC20.constructor(string,string).name (#575) shadows:
- ERC20.name() (#584-586) (function)
ERC20.constructor(string,string).symbol (#575) shadows:
- ERC20.symbol() (#592-594) (function)
Rename the local variables that shadow another component.

Additional information: link

Altbase.changeDevWallet(address).newAddress (#1341) lacks a zero-check on :
- _devWallet = newAddress (#1342)
Altbase.changeManualBurnWallet(address).newAddress (#1345) lacks a zero-check on :
- _manualBurnWallet = newAddress (#1346)
Check that the address is not zero.

Additional information: link

Reentrancy in Altbase._transfer(address,address,uint256) (#1124-1192):
External calls:
- swapAndLiquify(contractTokenBalance) (#1146)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1227-1233)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1146)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
State variables written after the call(s):
- _burn(from,burnAmount) (#1181)
- _totalSupply = _totalSupply.sub(amount) (#774)
Reentrancy in Altbase.constructor() (#1084-1107):
External calls:
- uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#1094-1095)
State variables written after the call(s):
- _devWallet = 0x792E67056D7f45C147234CB81D764b55b3bc9058 (#1101)
- excludeFromFee(msg.sender,true) (#1106)
- _isExcludedFromFee[account] = value (#1330)
- _manualBurnWallet = 0xe98Edf4a1f8bD45F11AF9535c55E943EC41e5D9C (#1102)
- uniswapV2Router = _uniswapV2Router (#1104)
Reentrancy in Altbase.swapAndLiquify(uint256) (#1194-1216):
External calls:
- swapTokensForEth(half) (#1206)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1227-1233)
- addLiquidity(otherHalf,newBalance) (#1212)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1212)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
State variables written after the call(s):
- addLiquidity(otherHalf,newBalance) (#1212)
- _allowances[owner][spender] = amount (#795)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in Altbase._transfer(address,address,uint256) (#1124-1192):
External calls:
- swapAndLiquify(contractTokenBalance) (#1146)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1227-1233)
External calls sending eth:
- swapAndLiquify(contractTokenBalance) (#1146)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
Event emitted after the call(s):
- Transfer(account,address(0),amount) (#775)
- _burn(from,burnAmount) (#1181)
- Transfer(sender,recipient,amount) (#735)
- super._transfer(from,address(this),tokensToLock) (#1180)
- Transfer(sender,recipient,amount) (#735)
- super._transfer(from,to,amount) (#1188)
- Transfer(sender,recipient,amount) (#735)
- super._transfer(from,to,tokensToTransfer) (#1186)
- Transfer(sender,recipient,amount) (#735)
- super._transfer(from,_devWallet,devAmount) (#1183)
- Transfer(sender,recipient,amount) (#735)
- super._transfer(from,_manualBurnWallet,manualBurn) (#1182)
Reentrancy in Altbase.swapAndLiquify(uint256) (#1194-1216):
External calls:
- swapTokensForEth(half) (#1206)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1227-1233)
- addLiquidity(otherHalf,newBalance) (#1212)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1212)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(this),block.timestamp) (#1241-1248)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#796)
- addLiquidity(otherHalf,newBalance) (#1212)
- SwapAndLiquify(half,newBalance,otherHalf) (#1215)
Apply the check-effects-interactions pattern.

Additional information: link

Address.isContract(address) (#399-408) uses assembly
- INLINE ASM (#406)
Address._functionCallWithValue(address,bytes,uint256,string) (#492-513) uses assembly
- INLINE ASM (#505-508)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['0.6.12', '^0.6.0']
- ^0.6.0 (#29)
- 0.6.12 (#1022)
Use one Solidity version.

Additional information: link

Address._functionCallWithValue(address,bytes,uint256,string) (#492-513) is never used and should be removed
Address.functionCall(address,bytes) (#452-454) is never used and should be removed
Address.functionCall(address,bytes,string) (#462-464) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#477-479) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#487-490) is never used and should be removed
Address.isContract(address) (#399-408) is never used and should be removed
Address.sendValue(address,uint256) (#426-432) is never used and should be removed
Context._msgData() (#52-55) is never used and should be removed
ERC20._setupDecimals(uint8) (#806-808) is never used and should be removed
SafeMath.mod(uint256,uint256) (#268-270) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#284-287) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.6.0 (#29) allows old versions
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.sendValue(address,uint256) (#426-432):
- (success) = recipient.call{value: amount}() (#430)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#492-513):
- (success,returndata) = target.call{value: weiValue}(data) (#496)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IUniswapV2ERC20.DOMAIN_SEPARATOR() (#866) is not in mixedCase
Function IUniswapV2ERC20.PERMIT_TYPEHASH() (#867) is not in mixedCase
Function IUniswapV2Router01.WETH() (#880) is not in mixedCase
Parameter Altbase.calculateTokenFee(uint256,uint8,uint32)._amount (#1256) is not in mixedCase
Parameter Altbase.calculateTokenFee(uint256,uint8,uint32)._feeDecimals (#1257) is not in mixedCase
Parameter Altbase.calculateTokenFee(uint256,uint8,uint32)._liquidityFee (#1258) is not in mixedCase
Parameter Altbase.setFeeDecimals(uint8)._feeDecimals (#1271) is not in mixedCase
Parameter Altbase.updateMinTokensBeforeSwap(uint128)._minTokensBeforeSwap (#1303) is not in mixedCase
Parameter Altbase.updateSwapAndLiquifyEnabled(bool)._enabled (#1311) is not in mixedCase
Parameter Altbase.burn(uint256)._amount (#1316) is not in mixedCase
Parameter Altbase.burnLiq(address,address,uint256)._token (#1320) is not in mixedCase
Parameter Altbase.burnLiq(address,address,uint256)._to (#1320) is not in mixedCase
Parameter Altbase.burnLiq(address,address,uint256)._amount (#1320) is not in mixedCase
Parameter Altbase.withdrawAnyToken(address,address,uint256)._recipient (#1349) is not in mixedCase
Parameter Altbase.withdrawAnyToken(address,address,uint256)._ERC20address (#1349) is not in mixedCase
Parameter Altbase.withdrawAnyToken(address,address,uint256)._amount (#1349) is not in mixedCase
Variable Altbase._totalSupply (#1053) is not in mixedCase
Variable Altbase._uniswapV2Router (#1039) is not in mixedCase
Variable Altbase._burnPool (#1041) is not in mixedCase
Variable Altbase._devWallet (#1043) is not in mixedCase
Variable Altbase._manualBurnWallet (#1044) is not in mixedCase
Variable Altbase._isExcludedFromFee (#1046) is not in mixedCase
Variable Altbase._isBlacklisted (#1047) is not in mixedCase
Variable Altbase._minimumSupply (#1054) is not in mixedCase
Variable Altbase._totalBurnedTokens (#1055) is not in mixedCase
Variable Altbase._totalBurnedLpTokens (#1056) is not in mixedCase
Variable Altbase._balanceOfLpTokens (#1057) is not in mixedCase
Variable Altbase._autoBurn (#1059) is not in mixedCase
Variable Altbase._devFee (#1060) is not in mixedCase
Variable Altbase._manualBurn (#1061) is not in mixedCase
Variable Altbase._paused (#1066) is not in mixedCase
Variable Altbase._feesDisabled (#1067) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#53)" inContext (#47-56)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#885) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#886)
Prevent variables from having similar names.

Additional information: link

Average 30d number of PancakeSwap swaps is low.

Contract has 1% buy tax and 1% sell tax.
Taxes are low but contract ownership is not renounced. Token has a high risk of becoming a honeypot.

Token is deployed only at one blockchain

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

Additional information: link

Unable to find token contract audit

Unable to find whitepaper link on the website

Unable to verify token contract address on the website

Unable to find audit 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

Token has relatively low CoinGecko rank