Richape Mille

Smart Contract Audit Report

Audit Summary

Richape Mille is building a new NFT collection with a presale and public sale.

For this audit, we reviewed Richape Mille's Richape contract at 0xAeF27204D7B8CE3eac2cFAa7b1837855e2C374B0 on the Polygon blockchain

Audit Findings

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Date: March 23nd, 2022.

Finding #1 - Richape - Low

Description: Any excess ETH supplied to the contract during minting is not returned to the user.
Risk/Impact: Users will lose any excess funds sent as payment.
Recommendation: The contract should require the user supplies the exact amount of ETH needed to mint the desired amount of NFTs.

Contract Overview

• This contract is used to facilitate a presale and a public sale of Richape NFTs.
• The total supply of Richape NFTs is 5711.
• While the presale is active, whitelisted users can each mint a maximum of 2 NFTs until the maximum public supply has been reached.
• The user must provide a signature and ID generated off-chain that can be used to verify the user is whitelisted to mint during the presale. Each ID can only be redeemed once.
• While the public sale is active, users can each mint a maximum of 20 NFTs at once until the maximum public supply has been reached.
• There may be different pricing available for NFTs purchased during the presale and during the public sale.
• Users should exercise caution and ensure that the correct amount of ETH is supplied, as the contract will not return any excess ETH to the user.
• In the event that the address receiving a Richape NFT is a contract, the contract must have implemented the onERC721Received() function in order to successfully receive the NFT.
• The token URI associated with each NFT is determined using the NFT's token ID, the contract's base URI, and the contract's URI extension.
• The owner can set the contract's base URI and URI extension at any time.
• The owner can set the URI for unrevealed tokens at any time.
• The owner can set the cost of the NFTs at any time.
• The owner can set the maximum number of NFTs an address can own during presale at any time.
• The owner can set the maximum amount a user can mint in one transaction during public sale at any time.
• The owner can toggle the presale and public sale at any time.
• The owner can pause or unpause the contract at any time. Only the owner can mint NFTs when the contract is paused.
• The owner can mint NFTs for no cost.
• The owner can withdraw any ETH in the contract balance at any time.

• As the contract is deployed with Solidity v0.8.2, it is protected from any underflow/overflow issues.
• The contract complies with the ERC-721 standard.

Audit Results

Inheritance Chart

Function Graph

Functions Overview

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

 +  Richape (Initializable, EIP712Upgradeable, ERC721EnumerableUpgradeable, OwnableUpgradeable)
    - [Pub] initialize #
       - modifiers: initializer
    - [Pub] mint ($)
    - [Pub] walletOfOwner
    - [Int] _baseURI
    - [Pub] tokenURI
    - [Pub] reveal #
       - modifiers: onlyOwner
    - [Pub] setCost #
       - modifiers: onlyOwner
    - [Pub] setmaxMintAmount #
       - modifiers: onlyOwner
    - [Pub] setBaseURI #
       - modifiers: onlyOwner
    - [Pub] setNotRevealedURI #
       - modifiers: onlyOwner
    - [Pub] setOnlyWhitelisted #
       - modifiers: onlyOwner
    - [Pub] setNftPerAddressLimit #
       - modifiers: onlyOwner
    - [Pub] setBaseExtension #
       - modifiers: onlyOwner
    - [Pub] pause #
       - modifiers: onlyOwner
    - [Pub] withdraw ($)
       - modifiers: onlyOwner
    - [Pub] check
    - [Int] _verify
    - [Int] _hash

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What is a SourceHat Audit?

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.

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