H20 Network Token
Smart Contract Audit Report
H2O Securities is building a new BEP-20 token on the Binance Smart Chain.
For this audit, we reviewed H2O Securities' H20NetworkToken contract at commit 88849643f9e6eb4a6bb65017a3a1bc5577ee892a on the team's GitHub repository.
Informational findings were identified and the team may want to review them.
Date: June 13th, 2022.
Finding #1 - H20NetworkToken - InformationalDescription: The overridden _transfer() function is redundant as all logic is present in the parent contract's _transfer() function.
Recommendation: The project team should consider removing the overridden _transfer() function in order to save additional gas costs on deployment and on each call.
- The total supply of the $H20N token is set to 10 billion (10,000,000,000 $H20N).
- No mint or burn functions are accessible beyond deployment, though the circulating supply can be decreased by sending tokens to the 0x..dead address.
- There was no token allocation for our team to analyze as the contract has yet to be deployed to the mainnet.
- Initially, 100% of the total supply is held by the owner.
- As the contract is implemented with Solidity v0.8.14, it is protected from overflows/underflows.
- This contract complies with the BEP-20 token standard.
|Arbitrary Jump/Storage Write||N/A||PASS|
|Centralization of Control||N/A||PASS|
|Delegate Call to Untrusted Contract||N/A||PASS|
|Dependence on Predictable Variables||N/A||PASS|
|Improper Authorization Scheme||N/A||PASS|
|Outdated Compiler Version||N/A||PASS|
|Overall Contract Safety||PASS|
($) = payable function # = non-constant function Int = Internal Ext = External Pub = Public + [Int] IERC20 - [Ext] totalSupply - [Ext] balanceOf - [Ext] transfer # - [Ext] allowance - [Ext] approve # - [Ext] transferFrom # + [Int] IFactory - [Ext] createPair # - [Ext] getPair + [Int] IRouter - [Ext] factory - [Ext] WETH - [Ext] addLiquidityETH ($) - [Ext] swapExactETHForTokensSupportingFeeOnTransferTokens ($) - [Ext] swapExactTokensForETHSupportingFeeOnTransferTokens # + [Int] IERC20Metadata (IERC20) - [Ext] name - [Ext] symbol - [Ext] decimals + [Lib] SafeMath - [Int] add - [Int] sub - [Int] sub - [Int] mul - [Int] div - [Int] div - [Int] mod - [Int] mod + 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 # + H2ONetworkToken (Ownable, ERC20) - [Pub] # - modifiers: ERC20 - [Ext] ($) - [Int] _transfer #
About Solidity Finance
Solidity Finance was founded in 2020 and quickly grew to have one of the most experienced and well-equipped smart contract auditing teams in the industry. Our team has conducted 1300+ solidity smart contract audits covering all major project types and protocols, securing a total of over $10 billion U.S. dollars in on-chain value.
Our firm is well-reputed in the community and is trusted as a top smart contract auditing company for the review of solidity code, no matter how complex. Our team of experienced solidity smart contract auditors performs audits for tokens, NFTs, crowdsales, marketplaces, gambling games, financial protocols, and more!
Contact us today to get a free quote for a smart contract audit of your project!
What is a Solidity Audit?
Typically, a smart contract audit is a comprehensive review process designed to discover logical errors, security vulnerabilities, and optimization opportunities within code. A Solidity 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.