Error Handling in '_createAuction' Function

[c4-bot-10]

Lines of code

https://github.com/code-423n4/2023-12-revolutionprotocol/blob/d42cc62b873a1b2b44f57310f9d4bbfdd875e8d6/packages/revolution/src/AuctionHouse.sol#L309

Vulnerability details

Potential Risk: The '_createAuction' function attempts to mint a new Verb by calling the 'verbs.mint()' function. However, it lacks proper error handling for the minting process. If the minting operation fails (e.g., due to insufficient gas or other reasons), the contract immediately pauses, potentially disrupting the functionality of the contract and affecting its users.

Proof of Concept (PoC): Consider a scenario where the 'verbs.mint()' function fails to mint a new Verb:

// Simulate a failure in 'verbs.mint()' by reverting function mint() external returns (uint256) { revert("Mint failed"); }

// Call '_createAuction' _createAuction();

In this PoC, the 'verbs.mint()' function is intentionally made to revert, simulating a minting failure. As a result, the '_createAuction' function catches the error and pauses the contract. This behavior could disrupt the contract's operations and impact users.

Recommended Mitigation Steps: To improve error handling in the '_createAuction' function and mitigate potential risks, consider implementing more robust error handling by distinguishing between different types of errors and handling them appropriately. Specifically:

1. Catch specific exceptions that indicate minting failures and handle them gracefully.
2. Implement error logging or emit specific error events to provide transparency and debugging information.

Here's a recommended solution:

function _createAuction() internal { // Check if there's enough gas to safely execute token.mint() and subsequent operations require(gasleft() >= MIN_TOKEN_MINT_GAS_THRESHOLD, "Insufficient gas for creating auction");

try verbs.mint() returns (uint256 verbId) {
    uint256 startTime = block.timestamp;
    uint256 endTime = startTime + duration;

    auction = Auction({
        verbId: verbId,
        amount: 0,
        startTime: startTime,
        endTime: endTime,
        bidder: payable(0),
        settled: false
    });

    emit AuctionCreated(verbId, startTime, endTime);
} catch Error(string memory mintError) {
    // Handle specific minting errors gracefully
    // Example: emit an error event or log the error message
    emit MintingError(mintError);
} catch {
    // Handle other unexpected errors gracefully
    // Example: emit a general error event or log the error message
    emit UnexpectedError("An unexpected error occurred during auction creation");
}

}

In this solution:

• We catch specific exceptions that indicate minting failures and handle them gracefully, providing better error reporting and handling.
• We also catch unexpected errors with a general catch block and emit an appropriate error event or log the error message for debugging purposes.

By implementing this solution, you can improve the error handling of the '_createAuction' function and enhance the robustness of your contract.

Assessed type

Invalid Validation

[c4-pre-sort]

raymondfam marked the issue as insufficient quality report

[c4-pre-sort]

raymondfam marked the issue as duplicate of #688

[c4-judge]

MarioPoneder marked the issue as unsatisfactory: Insufficient proof