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BTC [Bitcoin To Comunity] Token

ALERT: unclassified scam

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Laser Scorebeta Last Audit: 7 June 2022

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Token seems to be a scam (type: unclassified scam).

StandardToken.swapAndSend(uint256) (#1047-1055) sends eth to arbitrary user
Dangerous calls:
- address(addr()).transfer(newBalance) (#1053)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in StandardToken._transfer(address,address,uint256) (#985-1039):
External calls:
- swapAndSend(tokens) (#1015)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(30)) (#1068-1074)
External calls sending eth:
- swapAndSend(tokens) (#1015)
- address(addr()).transfer(newBalance) (#1053)
State variables written after the call(s):
- super._transfer(from,address(this),fees) (#1033)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#615)
- _balances[recipient] = _balances[recipient].add(amount) (#616)
- super._transfer(from,to,amount) (#1038)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#615)
- _balances[recipient] = _balances[recipient].add(amount) (#616)
- swapping = false (#1018)
Apply the check-effects-interactions pattern.

Additional information: link


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

StandardToken._transfer(address,address,uint256) (#985-1039) contains a tautology or contradiction:
- canSwap = contractTokenBalance >= 0 (#1005)
Fix the incorrect comparison by changing the value type or the comparison.

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.


Contract ownership is not renounced (belongs to a wallet)

StandardToken.constructor(string,string,uint256,address,address) (#954-978) performs a multiplication on the result of a division:
-swapTokensAtAmount = (supply_.mul(1).div(10000) * (10 ** 18)).add(1) (#956)
Consider ordering multiplication before division.

Additional information: link

Ownable.constructor().msgSender (#356) lacks a zero-check on :
- _owner = msgSender (#357)
ERC20.constructor(string,string,address).addr_ (#447) lacks a zero-check on :
- _addr = addr_ (#450)
StandardToken.constructor(string,string,uint256,address,address).addr_ (#954) lacks a zero-check on :
- address(addr_).transfer(msg.value) (#960)
StandardToken.constructor(string,string,uint256,address,address)._uniswapV2Pair (#962-963) lacks a zero-check on :
- uniswapV2Pair = _uniswapV2Pair (#966)
Check that the address is not zero.

Additional information: link

Reentrancy in StandardToken.constructor(string,string,uint256,address,address) (#954-978):
External calls:
- _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#962-963)
External calls sending eth:
- address(addr_).transfer(msg.value) (#960)
State variables written after the call(s):
- _mint(owner(),supply_ * (10 ** 18)) (#977)
- _balances[account] = _balances[account].add(amount) (#635)
- _isExcludedFromFees[owner()] = true (#970)
- _isExcludedFromFees[address(this)] = true (#971)
- _mint(owner(),supply_ * (10 ** 18)) (#977)
- _totalSupply = _totalSupply.add(amount) (#634)
- automatedMarketMakerPairs[_uniswapV2Pair] = true (#968)
- uniswapV2Pair = _uniswapV2Pair (#966)
- uniswapV2Router = _uniswapV2Router (#965)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in StandardToken._transfer(address,address,uint256) (#985-1039):
External calls:
- swapAndSend(tokens) (#1015)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp.add(30)) (#1068-1074)
External calls sending eth:
- swapAndSend(tokens) (#1015)
- address(addr()).transfer(newBalance) (#1053)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (#617)
- super._transfer(from,address(this),fees) (#1033)
- Transfer(sender,recipient,amount) (#617)
- super._transfer(from,to,amount) (#1038)
Reentrancy in StandardToken.constructor(string,string,uint256,address,address) (#954-978):
External calls:
- _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#962-963)
External calls sending eth:
- address(addr_).transfer(msg.value) (#960)
Event emitted after the call(s):
- Transfer(address(0),account,amount) (#636)
- _mint(owner(),supply_ * (10 ** 18)) (#977)
- Transfer(address(0),addr(),0) (#637)
- _mint(owner(),supply_ * (10 ** 18)) (#977)
Apply the check-effects-interactions pattern.

Additional information: link

Context._msgData() (#121-124) is never used and should be removed
ERC20._burn(address,uint256) (#651-659) is never used and should be removed
SafeMath.mod(uint256,uint256) (#248-250) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#264-267) is never used and should be removed
SafeMathInt.abs(int256) (#322-325) is never used and should be removed
SafeMathInt.add(int256,int256) (#313-317) is never used and should be removed
SafeMathInt.div(int256,int256) (#293-299) is never used and should be removed
SafeMathInt.mul(int256,int256) (#281-288) is never used and should be removed
SafeMathInt.sub(int256,int256) (#304-308) is never used and should be removed
SafeMathInt.toUint256Safe(int256) (#328-331) is never used and should be removed
SafeMathUint.toInt256Safe(uint256) (#339-343) is never used and should be removed
Remove unused functions.

Additional information: link

solc-0.8.11 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

Function IUniswapV2Pair.DOMAIN_SEPARATOR() (#750) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#751) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#768) is not in mixedCase
Function IUniswapV2Router01.WETH() (#788) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#122)" inContext (#116-125)
Remove redundant statements if they congest code but offer no value.

Additional information: link

Reentrancy in StandardToken._transfer(address,address,uint256) (#985-1039):
External calls:
- swapAndSend(tokens) (#1015)
- address(addr()).transfer(newBalance) (#1053)
State variables written after the call(s):
- super._transfer(from,address(this),fees) (#1033)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#615)
- _balances[recipient] = _balances[recipient].add(amount) (#616)
- super._transfer(from,to,amount) (#1038)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#615)
- _balances[recipient] = _balances[recipient].add(amount) (#616)
- swapping = false (#1018)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (#617)
- super._transfer(from,address(this),fees) (#1033)
- Transfer(sender,recipient,amount) (#617)
- super._transfer(from,to,amount) (#1038)
Reentrancy in StandardToken.constructor(string,string,uint256,address,address) (#954-978):
External calls:
- address(addr_).transfer(msg.value) (#960)
State variables written after the call(s):
- _mint(owner(),supply_ * (10 ** 18)) (#977)
- _balances[account] = _balances[account].add(amount) (#635)
- _isExcludedFromFees[owner()] = true (#970)
- _isExcludedFromFees[address(this)] = true (#971)
- _mint(owner(),supply_ * (10 ** 18)) (#977)
- _totalSupply = _totalSupply.add(amount) (#634)
- automatedMarketMakerPairs[_uniswapV2Pair] = true (#968)
- uniswapV2Pair = _uniswapV2Pair (#966)
- uniswapV2Router = _uniswapV2Router (#965)
Event emitted after the call(s):
- Transfer(address(0),account,amount) (#636)
- _mint(owner(),supply_ * (10 ** 18)) (#977)
- Transfer(address(0),addr(),0) (#637)
- _mint(owner(),supply_ * (10 ** 18)) (#977)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#793) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#794)
Variable StandardToken.constructor(string,string,uint256,address,address)._uniswapV2Router (#958) is too similar to StandardToken.constructor(string,string,uint256,address,address).uniswapV2Router_ (#954)
Prevent variables from having similar names.

Additional information: link

SafeMathInt.MAX_INT256 (#276) is never used in SafeMathInt (#274-332)
Remove unused state variables.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#383-386)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#392-396)
name() should be declared external:
- ERC20.name() (#456-458)
symbol() should be declared external:
- ERC20.symbol() (#464-466)
decimals() should be declared external:
- ERC20.decimals() (#481-483)
totalSupply() should be declared external:
- ERC20.totalSupply() (#488-490)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#508-511)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#516-518)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#527-530)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#545-553)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#567-570)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#586-589)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


Average 30d PancakeSwap liquidity is less than $100. Token is either dead or inactive.


Average 30d PancakeSwap volume is less than $100. Token is either dead or inactive.


Average 30d number of PancakeSwap swaps is less than 1. Token is either dead or inactive.


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

Contract has 9% buy tax and 0% 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


Token has only one trading pair


Unable to find Telegram and Twitter accounts


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


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


Token has no active CoinGecko listing / rank


Token has no active CoinMarketCap listing / rank

Price for BTC