Hippie [CryptoHippies] Token

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

Contract creator or owner is blacklisted for past scams

CryptoHippies.swapAndSendToFee(address,uint256) (#1140-1147) ignores return value by IERC20(BUSD).transfer(recipient,newBalance) (#1146)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

Additional information: link

CryptoHippies.addLiquidity(uint256,uint256) (#1213-1228) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#1219-1226)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Combination 2: Unchecked transfer + 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.

Reentrancy in CryptoHippies._transfer(address,address,uint256) (#1065-1138):
External calls:
- swapAndSendToFee(_marketingWalletAddress,marketingTokens) (#1111)
- IERC20(BUSD).transfer(recipient,newBalance) (#1146)
- uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1204-1210)
- swapAndSendToFee(_developmentWalletAddress,developmentTokens) (#1114)
- IERC20(BUSD).transfer(recipient,newBalance) (#1146)
- uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1204-1210)
State variables written after the call(s):
- super._transfer(from,address(this),fees) (#1134)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#797)
- _balances[recipient] = _balances[recipient].add(amount) (#798)
- super._transfer(from,to,amount) (#1137)
- _balances[sender] = _balances[sender].sub(amount,ERC20: transfer amount exceeds balance) (#797)
- _balances[recipient] = _balances[recipient].add(amount) (#798)
- swapping = false (#1116)
Apply the check-effects-interactions pattern.

Additional information: link

CryptoHippies.addLiquidity(uint256,uint256) (#1213-1228) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#1219-1226)
Ensure that all the return values of the function calls are used.

Additional information: link

CryptoHippies.setMaxWalletToken(uint256) (#1044-1046) should emit an event for:
- maxWalletTokens = maxToken (#1045)
Emit an event for critical parameter changes.

Additional information: link

CryptoHippies.whitelist(address,address)._presaleAddress (#1048) lacks a zero-check on :
- presaleAddress = _presaleAddress (#1049)
Check that the address is not zero.

Additional information: link

Reentrancy in CryptoHippies.updateUniswapV2Router(address) (#975-982):
External calls:
- _uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this),uniswapV2Router.WETH()) (#979-980)
State variables written after the call(s):
- uniswapV2Pair = _uniswapV2Pair (#981)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in CryptoHippies.swapAndLiquify(uint256) (#1149-1170):
External calls:
- swapTokensForEth(half) (#1161)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1184-1190)
- addLiquidity(otherHalf,newBalance) (#1167)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#1219-1226)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1167)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,address(0),block.timestamp) (#1219-1226)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#864)
- addLiquidity(otherHalf,newBalance) (#1167)
- SwapAndLiquify(half,newBalance,otherHalf) (#1169)
Apply the check-effects-interactions pattern.

Additional information: link

SafeMath.mod(uint256,uint256,string) (#576-579) is never used and should be removed
Remove unused functions.

Additional information: link

CryptoHippies.totalFees (#915) is set pre-construction with a non-constant function or state variable:
- developmentFee.add(marketingFee)
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

Pragma version^0.6.2 (#584) 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

Variable CryptoHippies._ownerWallet (#919) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (#128)" inContext (#122-131)
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 (#145) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#146)
Prevent variables from having similar names.

Additional information: link

CryptoHippies.slitherConstructorVariables() (#888-1230) uses literals with too many digits:
- maxWalletTokens = 1500000 (#903)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

CryptoHippies.deadWallet (#896) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

isExcludedFromFees(address) should be declared external:
- CryptoHippies.isExcludedFromFees(address) (#1061-1063)
Use the external attribute for functions never called from the contract.

Additional information: link

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 website, listings and other project-related information

Token is marked as scam (rug pull, honeypot, phishing, etc.)

Additional information: link

Young tokens have high risks of price dump / death

Token has no active CoinGecko listing / rank

Token has no active CoinMarketCap listing / rank