WOLFY [Wolfy Finance] Token

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

Wolfy.swapAndSendMarketing(uint256) (#1377-1384) sends eth to arbitrary user
Dangerous calls:
- _marketingWallet.transfer(newBalance) (#1383)
Wolfy.addLiquidity(uint256,uint256) (#1386-1399) sends eth to arbitrary user
Dangerous calls:
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in Wolfy._transfer(address,address,uint256) (#1296-1375):
External calls:
- swapAndLiquify(swapTokens) (#1325)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
- swapAndSendMarketing(marketingTokens) (#1328)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1325)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
- swapAndSendMarketing(marketingTokens) (#1328)
- _marketingWallet.transfer(newBalance) (#1383)
State variables written after the call(s):
- super._transfer(from,address(this),feeAmount) (#1369)
- _balances[sender] = senderBalance - amount (#914)
- _balances[recipient] += amount (#916)
- super._transfer(from,to,amount) (#1372)
- _balances[sender] = senderBalance - amount (#914)
- _balances[recipient] += amount (#916)
- swapAndSendMarketing(marketingTokens) (#1328)
- swapping = true (#1118)
- swapping = false (#1120)
Apply the check-effects-interactions pattern.

Additional information: link

Wolfy.claimStuckTokens(address) (#1204-1213) ignores return value by erc20token.transfer(owner(),balance) (#1212)
Use SafeERC20, or ensure that the transfer/transferFrom return value is checked.

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.

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.

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.

Wolfy._transfer(address,address,uint256).fees (#1341) is a local variable never initialized
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

Wolfy.addLiquidity(uint256,uint256) (#1386-1399) ignores return value by uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
Ensure that all the return values of the function calls are used.

Additional information: link

Wolfy.setBuyFee(uint16,uint16) (#1245-1253) should emit an event for:
- totalBuyFee = marketingfee + liquidity (#1252)
Wolfy.setSellFee(uint16,uint16) (#1255-1263) should emit an event for:
- totalSellFee = marketingfee + liquidity (#1262)
Wolfy.setMaxWallet(uint256) (#1280-1282) should emit an event for:
- maxWalletAmount = amount * 10 ** 9 (#1281)
Wolfy.setMaxBuyAmount(uint256) (#1284-1286) should emit an event for:
- maxBuyAmount = amount * 10 ** 9 (#1285)
Wolfy.setMaxSellAmount(uint256) (#1288-1290) should emit an event for:
- maxSellAmount = amount * 10 ** 9 (#1289)
Wolfy.setSwapTokensAtAmount(uint256) (#1292-1294) should emit an event for:
- swapTokensAtAmount = amount * 10 ** 9 (#1293)
Emit an event for critical parameter changes.

Additional information: link

Reentrancy in Wolfy._transfer(address,address,uint256) (#1296-1375):
External calls:
- swapAndLiquify(swapTokens) (#1325)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
- swapAndSendMarketing(marketingTokens) (#1328)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1325)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
- swapAndSendMarketing(marketingTokens) (#1328)
- _marketingWallet.transfer(newBalance) (#1383)
State variables written after the call(s):
- swapAndSendMarketing(marketingTokens) (#1328)
- _allowances[owner][spender] = amount (#993)
Reentrancy in Wolfy.constructor() (#1123-1163):
External calls:
- _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#1143-1144)
State variables written after the call(s):
- _mint(owner(),1 * 10 ** 12 * (10 ** 9)) (#1162)
- _balances[account] += amount (#938)
- excludeFromFees(owner(),true) (#1153)
- _isExcludedFromFees[account] = excluded (#1188)
- excludeFromFees(address(this),true) (#1154)
- _isExcludedFromFees[account] = excluded (#1188)
- _mint(owner(),1 * 10 ** 12 * (10 ** 9)) (#1162)
- _totalSupply += amount (#937)
- _setAutomatedMarketMakerPair(_uniswapV2Pair,true) (#1149)
- automatedMarketMakerPairs[pair] = value (#1240)
- swapEnabled = true (#1156)
- uniswapV2Pair = _uniswapV2Pair (#1147)
- uniswapV2Router = _uniswapV2Router (#1146)
Reentrancy in Wolfy.swapAndLiquify(uint256) (#1401-1418):
External calls:
- swapTokensForEth(half) (#1409)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
- addLiquidity(otherHalf,newBalance) (#1415)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1415)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
State variables written after the call(s):
- addLiquidity(otherHalf,newBalance) (#1415)
- _allowances[owner][spender] = amount (#993)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in Wolfy._transfer(address,address,uint256) (#1296-1375):
External calls:
- swapAndLiquify(swapTokens) (#1325)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
- swapAndSendMarketing(marketingTokens) (#1328)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1325)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
- swapAndSendMarketing(marketingTokens) (#1328)
- _marketingWallet.transfer(newBalance) (#1383)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#994)
- swapAndSendMarketing(marketingTokens) (#1328)
- Transfer(sender,recipient,amount) (#918)
- super._transfer(from,address(this),feeAmount) (#1369)
- Transfer(sender,recipient,amount) (#918)
- super._transfer(from,to,amount) (#1372)
Reentrancy in Wolfy.constructor() (#1123-1163):
External calls:
- _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this),_uniswapV2Router.WETH()) (#1143-1144)
Event emitted after the call(s):
- ExcludeFromFees(account,excluded) (#1190)
- excludeFromFees(address(this),true) (#1154)
- ExcludeFromFees(account,excluded) (#1190)
- excludeFromFees(owner(),true) (#1153)
- Transfer(address(0),account,amount) (#939)
- _mint(owner(),1 * 10 ** 12 * (10 ** 9)) (#1162)
Reentrancy in Wolfy.swapAndLiquify(uint256) (#1401-1418):
External calls:
- swapTokensForEth(half) (#1409)
- uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp) (#1429-1435)
- addLiquidity(otherHalf,newBalance) (#1415)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
External calls sending eth:
- addLiquidity(otherHalf,newBalance) (#1415)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
Event emitted after the call(s):
- Approval(owner,spender,amount) (#994)
- addLiquidity(otherHalf,newBalance) (#1415)
- SwapAndLiquify(half,newBalance,otherHalf) (#1417)
Apply the check-effects-interactions pattern.

Additional information: link

Different versions of Solidity is used:
- Version used: ['>=0.5.0', '>=0.6.2', '^0.8.0', '^0.8.11']
- >=0.5.0 (#13)
- >=0.5.0 (#68)
- >=0.6.2 (#88)
- >=0.6.2 (#186)
- ^0.8.0 (#235)
- ^0.8.0 (#465)
- ^0.8.0 (#492)
- ^0.8.0 (#570)
- ^0.8.0 (#655)
- ^0.8.0 (#685)
- ^0.8.11 (#1042)
Use one Solidity version.

Additional information: link

Context._msgData() (#482-484) is never used and should be removed
ERC20._burn(address,uint256) (#955-970) is never used and should be removed
SafeMath.add(uint256,uint256) (#324-326) is never used and should be removed
SafeMath.div(uint256,uint256,string) (#422-431) is never used and should be removed
SafeMath.mod(uint256,uint256) (#382-384) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#448-457) is never used and should be removed
SafeMath.sub(uint256,uint256,string) (#399-408) is never used and should be removed
SafeMath.tryAdd(uint256,uint256) (#253-259) is never used and should be removed
SafeMath.tryDiv(uint256,uint256) (#295-300) is never used and should be removed
SafeMath.tryMod(uint256,uint256) (#307-312) is never used and should be removed
SafeMath.tryMul(uint256,uint256) (#278-288) is never used and should be removed
SafeMath.trySub(uint256,uint256) (#266-271) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version>=0.5.0 (#13) allows old versions
Pragma version>=0.5.0 (#68) allows old versions
Pragma version>=0.6.2 (#88) allows old versions
Pragma version>=0.6.2 (#186) allows old versions
Pragma version^0.8.0 (#235) allows old versions
Pragma version^0.8.0 (#465) allows old versions
Pragma version^0.8.0 (#492) allows old versions
Pragma version^0.8.0 (#570) allows old versions
Pragma version^0.8.0 (#655) allows old versions
Pragma version^0.8.0 (#685) allows old versions
Pragma version^0.8.11 (#1042) necessitates a version too recent to be trusted. Consider deploying with 0.6.12/0.7.6/0.8.7
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() (#30) is not in mixedCase
Function IUniswapV2Pair.PERMIT_TYPEHASH() (#31) is not in mixedCase
Function IUniswapV2Pair.MINIMUM_LIQUIDITY() (#48) is not in mixedCase
Function IUniswapV2Router01.WETH() (#92) is not in mixedCase
Parameter Wolfy.claimStuckTokens(address)._token (#1204) is not in mixedCase
Constant Wolfy.deadAddress (#1050) is not in UPPER_CASE_WITH_UNDERSCORES
Variable Wolfy._marketingWallet (#1083) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Reentrancy in Wolfy._transfer(address,address,uint256) (#1296-1375):
External calls:
- swapAndSendMarketing(marketingTokens) (#1328)
- _marketingWallet.transfer(newBalance) (#1383)
External calls sending eth:
- swapAndLiquify(swapTokens) (#1325)
- uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this),tokenAmount,0,0,deadAddress,block.timestamp) (#1391-1398)
- swapAndSendMarketing(marketingTokens) (#1328)
- _marketingWallet.transfer(newBalance) (#1383)
State variables written after the call(s):
- super._transfer(from,address(this),feeAmount) (#1369)
- _balances[sender] = senderBalance - amount (#914)
- _balances[recipient] += amount (#916)
- super._transfer(from,to,amount) (#1372)
- _balances[sender] = senderBalance - amount (#914)
- _balances[recipient] += amount (#916)
Event emitted after the call(s):
- Transfer(sender,recipient,amount) (#918)
- super._transfer(from,address(this),feeAmount) (#1369)
- Transfer(sender,recipient,amount) (#918)
- super._transfer(from,to,amount) (#1372)
Apply the check-effects-interactions pattern.

Additional information: link

Variable IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#97) is too similar to IUniswapV2Router01.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#98)
Prevent variables from having similar names.

Additional information: link

renounceOwnership() should be declared external:
- Ownable.renounceOwnership() (#541-543)
transferOwnership(address) should be declared external:
- Ownable.transferOwnership(address) (#549-552)
name() should be declared external:
- ERC20.name() (#742-744)
symbol() should be declared external:
- ERC20.symbol() (#750-752)
decimals() should be declared external:
- ERC20.decimals() (#767-769)
- Wolfy.decimals() (#1167-1169)
totalSupply() should be declared external:
- ERC20.totalSupply() (#774-776)
transfer(address,uint256) should be declared external:
- ERC20.transfer(address,uint256) (#793-796)
allowance(address,address) should be declared external:
- ERC20.allowance(address,address) (#801-803)
approve(address,uint256) should be declared external:
- ERC20.approve(address,uint256) (#812-815)
transferFrom(address,address,uint256) should be declared external:
- ERC20.transferFrom(address,address,uint256) (#830-844)
increaseAllowance(address,uint256) should be declared external:
- ERC20.increaseAllowance(address,uint256) (#858-861)
decreaseAllowance(address,uint256) should be declared external:
- ERC20.decreaseAllowance(address,uint256) (#877-885)
updateUniswapV2Router(address) should be declared external:
- Wolfy.updateUniswapV2Router(address) (#1174-1181)
excludeMultipleAccountsFromFees(address[],bool) should be declared external:
- Wolfy.excludeMultipleAccountsFromFees(address[],bool) (#1193-1202)
setAutomatedMarketMakerPair(address,bool) should be declared external:
- Wolfy.setAutomatedMarketMakerPair(address,bool) (#1223-1233)
isExcludedFromFees(address) should be declared external:
- Wolfy.isExcludedFromFees(address) (#1266-1268)
Use the external attribute for functions never called from the contract.

Additional information: link

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.

Average PancakeSwap trading volume, liqudity, number of swaps are extremely low. Token seems to be dead.

Contract has 10% buy tax and 12% sell tax.
Taxes are high (over 10%) but contract ownership is renounced.

Token is deployed only at one blockchain

Token has only one trading pair

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