Handbook with smart contract

[leeduckgo]

smart contractize a book.

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[leeduckgo]

Prompt：

gnerate an ethereum smart contract, it called on-chain-book, it including a struct called book: name, description, author, full-content(arweave-id list), the full-content and description is upgradable, and structs called comment: author, full-content(arweave-id).

Resp：

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract OnChainBook {
    struct Book {
        string name;
        string description;
        address author;
        string[] fullContentArweaveIds;
    }

    struct Comment {
        address author;
        string fullContentArweaveId;
    }

    mapping(uint256 => Book) public books;
    mapping(uint256 => Comment[]) public bookComments;
    uint256 public bookCount;

    event BookCreated(uint256 indexed bookId, string name, address author);
    event BookUpdated(uint256 indexed bookId, string description, string[] fullContentArweaveIds);
    event CommentAdded(uint256 indexed bookId, address author, string fullContentArweaveId);

    function createBook(string memory _name, string memory _description, string[] memory _fullContentArweaveIds) public {
        bookCount++;
        books[bookCount] = Book(_name, _description, msg.sender, _fullContentArweaveIds);
        emit BookCreated(bookCount, _name, msg.sender);
    }

    function updateBook(uint256 _bookId, string memory _description, string[] memory _fullContentArweaveIds) public {
        require(msg.sender == books[_bookId].author, "Only the author can update the book");
        books[_bookId].description = _description;
        books[_bookId].fullContentArweaveIds = _fullContentArweaveIds;
        emit BookUpdated(_bookId, _description, _fullContentArweaveIds);
    }

    function addComment(uint256 _bookId, string memory _fullContentArweaveId) public {
        bookComments[_bookId].push(Comment(msg.sender, _fullContentArweaveId));
        emit CommentAdded(_bookId, msg.sender, _fullContentArweaveId);
    }
}

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