PPI [Peppa Pig Inu] Token

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

PeppaPigInu.swapBack() (#348-389) sends eth to arbitrary user
Dangerous calls:
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
Ensure that an arbitrary user cannot withdraw unauthorized funds.

Additional information: link

Reentrancy in PeppaPigInu._transferFrom(address,address,uint256) (#280-309):
External calls:
- swapBack() (#298)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#359-365)
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
External calls sending eth:
- swapBack() (#298)
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
State variables written after the call(s):
- _balances[sender] = _balances[sender].sub(amount,Insufficient Balance) (#302)
- _balances[recipient] = _balances[recipient].add(amountReceived) (#305)
- amountReceived = takeFee(sender,recipient,amount) (#304)
- _balances[address(this)] = _balances[address(this)].add(feeAmount) (#335)
Apply the check-effects-interactions pattern.

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.

Not a direct threat, but may indicate unreliable intentions of developer. Widespread names (e.g. Elon, King, Moon, Doge) are common among meme-tokens and scams. The allow to gain free hype and attract unexperienced investors.

PeppaPigInu.slitherConstructorVariables() (#193-493) performs a multiplication on the result of a division:
-swapThreshold = _totalSupply / 1000 * 3 (#230)
Consider ordering multiplication before division.

Additional information: link

PeppaPigInu.BotChecker(address[],bool).i (#463) 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

PeppaPigInu.swapBack() (#348-389) ignores return value by router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
Ensure that all the return values of the function calls are used.

Additional information: link

PeppaPigInu.setTxLimit(uint256) (#422-425) should emit an event for:
- _maxTxAmount = amount (#424)
PeppaPigInu.setMaxWallet(uint256) (#427-430) should emit an event for:
- _maxWalletSize = amount (#429)
PeppaPigInu.setFees(uint256,uint256,uint256,uint256) (#440-446) should emit an event for:
- liquidityFee = _liquidityFee (#441)
- buybackFee = _buybackFee (#442)
- marketingFee = _marketingFee (#443)
- totalFee = _liquidityFee.add(_buybackFee).add(_marketingFee) (#444)
- feeDenominator = _feeDenominator (#445)
Emit an event for critical parameter changes.

Additional information: link

Auth.transferOwnership(address).adr (#132) lacks a zero-check on :
- owner = adr (#133)
PeppaPigInu.setFeeReceiver(address,address)._marketingFeeReceiver (#448) lacks a zero-check on :
- marketingFeeReceiver = _marketingFeeReceiver (#449)
PeppaPigInu.setFeeReceiver(address,address)._buybackFeeReceiver (#448) lacks a zero-check on :
- buybackFeeReceiver = _buybackFeeReceiver (#450)
Check that the address is not zero.

Additional information: link

Reentrancy in PeppaPigInu._transferFrom(address,address,uint256) (#280-309):
External calls:
- swapBack() (#298)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#359-365)
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
External calls sending eth:
- swapBack() (#298)
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
State variables written after the call(s):
- launch() (#300)
- launchedAt = block.number (#409)
Reentrancy in PeppaPigInu.constructor() (#234-245):
External calls:
- pair = IDEXFactory(router.factory()).createPair(WBNB,address(this)) (#236)
State variables written after the call(s):
- _allowances[address(this)][address(router)] = type()(uint256).max (#237)
- _balances[_owner] = _totalSupply (#243)
- isFeeExempt[_owner] = true (#240)
- isTxLimitExempt[_owner] = true (#241)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in PeppaPigInu._transferFrom(address,address,uint256) (#280-309):
External calls:
- swapBack() (#298)
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#359-365)
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
External calls sending eth:
- swapBack() (#298)
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
Event emitted after the call(s):
- Transfer(sender,address(this),feeAmount) (#336)
- amountReceived = takeFee(sender,recipient,amount) (#304)
- Transfer(sender,recipient,amountReceived) (#307)
Reentrancy in PeppaPigInu.constructor() (#234-245):
External calls:
- pair = IDEXFactory(router.factory()).createPair(WBNB,address(this)) (#236)
Event emitted after the call(s):
- Transfer(address(0),_owner,_totalSupply) (#244)
Reentrancy in PeppaPigInu.swapBack() (#348-389):
External calls:
- router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap,0,path,address(this),block.timestamp) (#359-365)
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
External calls sending eth:
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
- router.addLiquidityETH{value: amountBNBLiquidity}(address(this),amountToLiquify,0,0,marketingFeeReceiver,block.timestamp) (#379-386)
Event emitted after the call(s):
- AutoLiquify(amountBNBLiquidity,amountToLiquify) (#387)
Apply the check-effects-interactions pattern.

Additional information: link

PeppaPigInu.buyTokens(uint256,address) (#391-402) is never used and should be removed
PeppaPigInu.maxAmount() (#413-415) is never used and should be removed
PeppaPigInu.maxWallet() (#418-420) is never used and should be removed
Remove unused functions.

Additional information: link

PeppaPigInu._maxTxAmount (#205) is set pre-construction with a non-constant function or state variable:
- (_totalSupply * 1) / 100
PeppaPigInu._maxWalletSize (#206) is set pre-construction with a non-constant function or state variable:
- (_totalSupply * 1) / 100
PeppaPigInu.swapThreshold (#230) is set pre-construction with a non-constant function or state variable:
- _totalSupply / 1000 * 3
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

Low level call in PeppaPigInu.swapBack() (#348-389):
- (MarketingSuccess) = address(marketingFeeReceiver).call{gas: 30000,value: amountBNBMarketing}() (#373)
- (buybackSuccess) = address(buybackFeeReceiver).call{gas: 30000,value: amountBNBbuyback}() (#375)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Function IDEXRouter.WETH() (#147) is not in mixedCase
Parameter PeppaPigInu.setFees(uint256,uint256,uint256,uint256)._liquidityFee (#440) is not in mixedCase
Parameter PeppaPigInu.setFees(uint256,uint256,uint256,uint256)._buybackFee (#440) is not in mixedCase
Parameter PeppaPigInu.setFees(uint256,uint256,uint256,uint256)._marketingFee (#440) is not in mixedCase
Parameter PeppaPigInu.setFees(uint256,uint256,uint256,uint256)._feeDenominator (#440) is not in mixedCase
Parameter PeppaPigInu.setFeeReceiver(address,address)._marketingFeeReceiver (#448) is not in mixedCase
Parameter PeppaPigInu.setFeeReceiver(address,address)._buybackFeeReceiver (#448) is not in mixedCase
Parameter PeppaPigInu.setSwapBackSettings(bool,uint256)._enabled (#453) is not in mixedCase
Parameter PeppaPigInu.setSwapBackSettings(bool,uint256)._amount (#453) is not in mixedCase
Parameter PeppaPigInu.setSwapEnabled(bool)._enabled (#458) is not in mixedCase
Function PeppaPigInu.BotChecker(address[],bool) (#462-466) is not in mixedCase
Parameter PeppaPigInu.transferForeignToken(address)._token (#473) is not in mixedCase
Variable PeppaPigInu.WBNB (#196) is not in mixedCase
Variable PeppaPigInu.DEAD (#197) is not in mixedCase
Variable PeppaPigInu.ZERO (#198) is not in mixedCase
Constant PeppaPigInu._name (#200) is not in UPPER_CASE_WITH_UNDERSCORES
Constant PeppaPigInu._symbol (#201) is not in UPPER_CASE_WITH_UNDERSCORES
Constant PeppaPigInu._decimals (#202) is not in UPPER_CASE_WITH_UNDERSCORES
Variable PeppaPigInu._totalSupply (#204) is not in mixedCase
Variable PeppaPigInu._maxTxAmount (#205) is not in mixedCase
Variable PeppaPigInu._maxWalletSize (#206) is not in mixedCase
Variable PeppaPigInu._balances (#208) is not in mixedCase
Variable PeppaPigInu._allowances (#209) is not in mixedCase
Variable PeppaPigInu.IsOpen (#228) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Variable IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountADesired (#152) is too similar to IDEXRouter.addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256).amountBDesired (#153)
Prevent variables from having similar names.

Additional information: link

PeppaPigInu.slitherConstructorVariables() (#193-493) uses literals with too many digits:
- DEAD = 0x000000000000000000000000000000000000dEaD (#197)
PeppaPigInu.slitherConstructorVariables() (#193-493) uses literals with too many digits:
- ZERO = 0x0000000000000000000000000000000000000000 (#198)
PeppaPigInu.slitherConstructorVariables() (#193-493) uses literals with too many digits:
- _totalSupply = 100000 * (10 ** _decimals) (#204)
Use: Ether suffix, Time suffix, or The scientific notation

Additional information: link

PeppaPigInu.DEAD (#197) should be constant
PeppaPigInu.WBNB (#196) should be constant
PeppaPigInu.ZERO (#198) should be constant
PeppaPigInu._totalSupply (#204) should be constant
Add the constant attributes to state variables that never change.

Additional information: link

authorize(address) should be declared external:
- Auth.authorize(address) (#104-106)
unauthorize(address) should be declared external:
- Auth.unauthorize(address) (#111-113)
transferOwnership(address) should be declared external:
- Auth.transferOwnership(address) (#132-136)
transferForeignToken(address) should be declared external:
- PeppaPigInu.transferForeignToken(address) (#473-477)
isOverLiquified(uint256,uint256) should be declared external:
- PeppaPigInu.isOverLiquified(uint256,uint256) (#487-489)
Use the external attribute for functions never called from the contract.

Additional information: link

Token seems to be untradeable: there is no PancakeSwap trading pair and no trading volumes. Ignore for presale.

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

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