YHCToken._addLiquidity(uint256) (contracts/YHCToken.sol#218-247) sends eth to arbitrary user
Dangerous calls:
- UNISWAPV2_ROUTER.addLiquidityETH{value: address(this).balance}(address(this),liquidityAmount,0,0,owner(),block.timestamp) (contracts/YHCToken.sol#238-245)
Ensure that an arbitrary user cannot withdraw unauthorized funds.
Additional information: link
Reentrancy in YHCToken._transfer(address,address,uint256) (contracts/YHCToken.sol#191-216):
External calls:
- _addLiquidity(liquidityAmount) (contracts/YHCToken.sol#211)
- UNISWAPV2_ROUTER.swapExactTokensForETHSupportingFeeOnTransferTokens(liquidityAmount,0,path,address(this),block.timestamp) (contracts/YHCToken.sol#230-236)
- UNISWAPV2_ROUTER.addLiquidityETH{value: address(this).balance}(address(this),liquidityAmount,0,0,owner(),block.timestamp) (contracts/YHCToken.sol#238-245)
External calls sending eth:
- _addLiquidity(liquidityAmount) (contracts/YHCToken.sol#211)
- UNISWAPV2_ROUTER.addLiquidityETH{value: address(this).balance}(address(this),liquidityAmount,0,0,owner(),block.timestamp) (contracts/YHCToken.sol#238-245)
State variables written after the call(s):
- super._transfer(sender,recipient,amount) (contracts/YHCToken.sol#215)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (@openzeppelin/contracts/token/ERC20/ERC20.sol#214)
- _balances[recipient] = _balances[recipient].add(amount) (@openzeppelin/contracts/token/ERC20/ERC20.sol#215)
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.
YHCToken._addLiquidity(uint256) (contracts/YHCToken.sol#218-247) ignores return value by UNISWAPV2_ROUTER.addLiquidityETH{value: address(this).balance}(address(this),liquidityAmount,0,0,owner(),block.timestamp) (contracts/YHCToken.sol#238-245)
Ensure that all the return values of the function calls are used.
Additional information: link
Reentrancy in YHCToken.withdrawToken(address,address,uint256) (contracts/YHCToken.sol#176-189):
External calls:
- require(bool,string)(token.transfer(recipient,amount),Token transfer failed) (contracts/YHCToken.sol#182)
State variables written after the call(s):
- totalLiquidity = balanceOf(address(this)) (contracts/YHCToken.sol#187)
Apply the check-effects-interactions pattern.
Additional information: link
Reentrancy in YHCToken._transfer(address,address,uint256) (contracts/YHCToken.sol#191-216):
External calls:
- _addLiquidity(liquidityAmount) (contracts/YHCToken.sol#211)
- UNISWAPV2_ROUTER.swapExactTokensForETHSupportingFeeOnTransferTokens(liquidityAmount,0,path,address(this),block.timestamp) (contracts/YHCToken.sol#230-236)
- UNISWAPV2_ROUTER.addLiquidityETH{value: address(this).balance}(address(this),liquidityAmount,0,0,owner(),block.timestamp) (contracts/YHCToken.sol#238-245)
External calls sending eth:
- _addLiquidity(liquidityAmount) (contracts/YHCToken.sol#211)
- UNISWAPV2_ROUTER.addLiquidityETH{value: address(this).balance}(address(this),liquidityAmount,0,0,owner(),block.timestamp) (contracts/YHCToken.sol#238-245)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (@openzeppelin/contracts/token/ERC20/ERC20.sol#216)
- super._transfer(sender,recipient,amount) (contracts/YHCToken.sol#215)
Apply the check-effects-interactions pattern.
Additional information: link
Address._verifyCallResult(bool,bytes,string) (@openzeppelin/contracts/utils/Address.sol#171-188) uses assembly
- INLINE ASM (@openzeppelin/contracts/utils/Address.sol#180-183)
Do not use evm assembly.
Additional information: link
Different versions of Solidity is used:
- Version used: ['>=0.5.0', '>=0.6.0<0.8.0', '>=0.6.2', '>=0.6.2<0.8.0', '^0.6.12']
- >=0.6.0<0.8.0 (@openzeppelin/contracts/access/AccessControl.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/access/Ownable.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/math/SafeMath.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/ERC20.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/token/ERC20/IERC20.sol#3)
- >=0.6.2<0.8.0 (@openzeppelin/contracts/utils/Address.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/utils/Context.sol#3)
- >=0.6.0<0.8.0 (@openzeppelin/contracts/utils/EnumerableSet.sol#3)
- ^0.6.12 (contracts/YHCToken.sol#2)
- >=0.5.0 (contracts/interfaces/uniswap/IUniswapV2Factory.sol#2)
- >=0.6.2 (contracts/interfaces/uniswap/IUniswapV2Router01.sol#2)
- >=0.6.2 (contracts/interfaces/uniswap/IUniswapV2Router02.sol#2)
Use one Solidity version.
Additional information: link
YHCToken._transfer(address,address,uint256) (contracts/YHCToken.sol#191-216) is never used and should be removed
Remove unused functions.
Additional information: link
Pragma version>=0.6.2 (contracts/interfaces/uniswap/IUniswapV2Router02.sol#2) 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.functionDelegateCall(address,bytes,string) (@openzeppelin/contracts/utils/Address.sol#163-169):
- (success,returndata) = target.delegatecall(data) (@openzeppelin/contracts/utils/Address.sol#167)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence
Additional information: link
Function IUniswapV2Router01.WETH() (contracts/interfaces/uniswap/IUniswapV2Router01.sol#7) is not in mixedCase
Follow the Solidity naming convention.
Additional information: link
Redundant expression "this (@openzeppelin/contracts/utils/Context.sol#21)" inContext (@openzeppelin/contracts/utils/Context.sol#15-24)
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 (contracts/interfaces/uniswap/IUniswapV2Router01.sol#12) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (contracts/interfaces/uniswap/IUniswapV2Router01.sol#13)
Prevent variables from having similar names.
Additional information: link
burnFrom(address,uint256) should be declared external:
- ERC20Burnable.burnFrom(address,uint256) (contracts/YHCToken.sol#75-83)
Use the external attribute for functions never called from the contract.
Additional information: link
Average 30d PancakeSwap volume is low.
Average PancakeSwap trading volume, liqudity, number of swaps are low. Token seems to be inactive.
Token is deployed only at one blockchain
Unable to find PancakeSwap trading pair to compute liquidity.
Unable to find PancakeSwap trading pair to compute number of swaps.
BscScan page for the token does not contain additional info: website, socials, description, etc.
Additional information: link
Unable to find token/project description on the website or on BscScan, CoinMarketCap
Unable to find token contract audit
Unable to verify token contract address on the website
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 token/project description on the website or on BscScan, CoinHunt, CoinGecko, CoinMarketCap
Unable to find code repository for the project
Young tokens have high risks of price dump / death
Young tokens have high risks of scam / price dump / death
Young tokens have high risks of scam / price dump / death
Young tokens have high risks of price dump / death
Token has relatively low CoinGecko rank
Token has relatively low CoinMarketCap rank
Telegram account link seems to be invalid
Twitter account link seems to be invalid
Unable to find Blog account (Reddit or Medium)
Unable to find Youtube account