Hollywood X PEPE

Smart Contract Audit Report

Audit Summary

Hollywood X PEPE Audit Report Hollywood X PEPE is a new ERC-20 token on Ethereum.

For this audit, we reviewed the project team's HXPE contract at 0xf3db6e766d7e4034f5509266ca6523896e57d315 on the Ethereum Mainnet.

Audit Findings

An Informational finding was identified and the team may want to review them.
Date: May 26th, 2023.

Finding #1 - HXPE - Informational

Description: The last else block in the _transfer() function is redundant as the _totalFees local variable is already set to zero. 
uint256 _totalFees;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to] || swapping) {
	_totalFees = 0;
} else if (from == uniswapV2Pair) {
	_totalFees = marketingFeeOnBuy;
} else if (to == uniswapV2Pair) {
	_totalFees =  marketingFeeOnSell;
} else {
	_totalFees = 0;
}
Recommendation: The last else block could be removed as follows for additional gas savings on each transfer: 
if (_isExcludedFromFees[from] || _isExcludedFromFees[to] || swapping) {
	_totalFees = 0;
} else if (from == uniswapV2Pair) {   
	_totalFees = marketingFeeOnBuy;
} else if (to == uniswapV2Pair) {        
	_totalFees =  marketingFeeOnSell;
}

Contract Overview

  • The total supply of the token is set to 100 billion $HXPE [100,000,000,000].
  • No mint or burn functions are publicly accessible, though the circulating supply can be decreased by sending tokens to the 0x..dead address.
  • At the time of writing this report, there are 8 total token holders. The token allocation is as follows:
    • 50% of the total supply belongs to the HXPEPresale contract.
    • 49.25% of the total supply belongs to the deployer.
    • The remaining six EOAs own a cumulative 0.75% of the total supply.

  • Trading must be enabled by the team before all token transfers can take place on the platform. Only accounts excluded from fees can participate in transfers when trading is disabled. Once trading is enabled it can never be disabled.
  • There is a Marketing fee on all buys and sells via Uniswap where neither the sender nor the recipient is excluded from fees.
  • The tokens collected through the Marketing fee are stored in the contract address. The tokens are swapped for ETH and sent to the team's Marketing address when the following conditions are met:
    • The automatic liquidity add functionality is enabled by the team.
    • The threshold number of tokens (determined by the owner) in the contract address has been reached.
    • The contract is not currently performing an automatic liquidity add.
    • The caller is initiating a sell transaction via Uniswap.

  • The owner can include and exclude accounts from the transfer fee at any time.
  • The owner can enable/disable the automatic token swapping functionality at any time.
  • The owner can set the threshold number of tokens needed to trigger the automatic token swapping functionality to any value greater than 100,000 tokens at any time.
  • The owner can withdraw any tokens besides $HXPE from the contract at any time.
  • The owner can withdraw all of the ETH from the contract at any time.

Audit Results

Vulnerability Category Notes Result
Arbitrary Jump/Storage Write N/A PASS
Centralization of Control The deployer currently owns 49.25% of the total supply. PASS
Compiler Issues N/A PASS
Delegate Call to Untrusted Contract N/A PASS
Dependence on Predictable Variables N/A PASS
Ether/Token Theft N/A PASS
Flash Loans N/A PASS
Front Running N/A PASS
Improper Events N/A PASS
Improper Authorization Scheme N/A PASS
Integer Over/Underflow N/A PASS
Logical Issues N/A PASS
Oracle Issues N/A PASS
Outdated Compiler Version N/A PASS
Race Conditions N/A PASS
Reentrancy N/A PASS
Signature Issues N/A PASS
Sybil Attack N/A PASS
Unbounded Loops N/A PASS
Unused Code N/A PASS
Overall Contract Safety   PASS

Inheritance Chart

Smart Contract Audit - Inheritance

Function Graph

Smart Contract Audit - Graph

Functions Overview


 ($) = payable function
 # = non-constant function
 
 Int = Internal
 Ext = External
 Pub = Public



 + [Int] IUniswapV2Factory 
    - [Ext] feeTo
    - [Ext] feeToSetter
    - [Ext] getPair
    - [Ext] allPairs
    - [Ext] allPairsLength
    - [Ext] createPair #
    - [Ext] setFeeTo #
    - [Ext] setFeeToSetter #

 + [Int] IUniswapV2Pair 
    - [Ext] name
    - [Ext] symbol
    - [Ext] decimals
    - [Ext] totalSupply
    - [Ext] balanceOf
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transfer #
    - [Ext] transferFrom #
    - [Ext] DOMAIN_SEPARATOR
    - [Ext] PERMIT_TYPEHASH
    - [Ext] nonces
    - [Ext] permit #
    - [Ext] MINIMUM_LIQUIDITY
    - [Ext] factory
    - [Ext] token0
    - [Ext] token1
    - [Ext] getReserves
    - [Ext] price0CumulativeLast
    - [Ext] price1CumulativeLast
    - [Ext] kLast
    - [Ext] mint #
    - [Ext] burn #
    - [Ext] swap #
    - [Ext] skim #
    - [Ext] sync #
    - [Ext] initialize #

 + [Int] IUniswapV2Router01 
    - [Ext] factory
    - [Ext] WETH
    - [Ext] addLiquidity #
    - [Ext] addLiquidityETH ($)
    - [Ext] removeLiquidity #
    - [Ext] removeLiquidityETH #
    - [Ext] removeLiquidityWithPermit #
    - [Ext] removeLiquidityETHWithPermit #
    - [Ext] swapExactTokensForTokens #
    - [Ext] swapTokensForExactTokens #
    - [Ext] swapExactETHForTokens ($)
    - [Ext] swapTokensForExactETH #
    - [Ext] swapExactTokensForETH #
    - [Ext] swapETHForExactTokens ($)
    - [Ext] quote
    - [Ext] getAmountOut
    - [Ext] getAmountIn
    - [Ext] getAmountsOut
    - [Ext] getAmountsIn

 + [Int] IUniswapV2Router02 (IUniswapV2Router01)
    - [Ext] removeLiquidityETHSupportingFeeOnTransferTokens #
    - [Ext] removeLiquidityETHWithPermitSupportingFeeOnTransferTokens #
    - [Ext] swapExactTokensForTokensSupportingFeeOnTransferTokens #
    - [Ext] swapExactETHForTokensSupportingFeeOnTransferTokens ($)
    - [Ext] swapExactTokensForETHSupportingFeeOnTransferTokens #

 + [Int] IERC20 
    - [Ext] totalSupply
    - [Ext] balanceOf
    - [Ext] transfer #
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transferFrom #

 + [Int] IERC20Metadata (IERC20)
    - [Ext] name
    - [Ext] symbol
    - [Ext] decimals

 + [Lib] Address 
    - [Int] isContract
    - [Int] sendValue #
    - [Int] functionCall #
    - [Int] functionCall #
    - [Int] functionCallWithValue #
    - [Int] functionCallWithValue #
    - [Int] functionStaticCall
    - [Int] functionStaticCall
    - [Int] functionDelegateCall #
    - [Int] functionDelegateCall #
    - [Int] verifyCallResultFromTarget
    - [Int] verifyCallResult
    - [Prv] _revert

 +  Context 
    - [Int] _msgSender
    - [Int] _msgData

 +  Ownable (Context)
    - [Pub]  #
    - [Pub] owner
    - [Pub] renounceOwnership #
       - modifiers: onlyOwner
    - [Pub] transferOwnership #
       - modifiers: onlyOwner

 +  ERC20 (Context, IERC20, IERC20Metadata)
    - [Pub]  #
    - [Pub] name
    - [Pub] symbol
    - [Pub] decimals
    - [Pub] totalSupply
    - [Pub] balanceOf
    - [Pub] transfer #
    - [Pub] allowance
    - [Pub] approve #
    - [Pub] transferFrom #
    - [Pub] increaseAllowance #
    - [Pub] decreaseAllowance #
    - [Int] _transfer #
    - [Int] _mint #
    - [Int] _burn #
    - [Int] _approve #
    - [Int] _beforeTokenTransfer #
    - [Int] _afterTokenTransfer #

 +  HXPE (ERC20, Ownable)
    - [Pub]  #
       - modifiers: ERC20
    - [Ext]  ($)
    - [Ext] claimStuckTokens #
       - modifiers: onlyOwner
    - [Ext] excludeFromFees #
       - modifiers: onlyOwner
    - [Pub] isExcludedFromFees
    - [Ext] enableTrading #
       - modifiers: onlyOwner
    - [Int] _transfer #
    - [Ext] setSwapEnabled #
       - modifiers: onlyOwner
    - [Ext] setSwapTokensAtAmount #
       - modifiers: onlyOwner
    - [Prv] swapAndSendMarketing #

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Typically, a smart contract audit is a comprehensive review process designed to discover logical errors, security vulnerabilities, and optimization opportunities within code. A SourceHat Audit takes this a step further by verifying economic logic to ensure the stability of smart contracts and highlighting privileged functionality to create a report that is easy to understand for developers and community members alike.

How Do I Interpret the Findings?

Each of our Findings will be labeled with a Severity level. We always recommend the team resolve High, Medium, and Low severity findings prior to deploying the code to the mainnet. Here is a breakdown on what each Severity level means for the project:

  • High severity indicates that the issue puts a large number of users' funds at risk and has a high probability of exploitation, or the smart contract contains serious logical issues which can prevent the code from operating as intended.
  • Medium severity issues are those which place at least some users' funds at risk and has a medium to high probability of exploitation.
  • Low severity issues have a relatively minor risk association; these issues have a low probability of occurring or may have a minimal impact.
  • Informational issues pose no immediate risk, but inform the project team of opportunities for gas optimizations and following smart contract security best practices.