Create from contract

Create a table from a contract.

---

Smart contracts can create tables on behalf of some caller, which then mints a table to the msg.sender. This is a factory pattern where the contract is tracking ownership with a mapping(string => uint256) of table names to table IDs.

Note that in order for the contract to own a table (i.e., minting to address(this) over msg.sender), you would have to implement ERC721 contract ownership through an interface or some inheritance pattern. You can learn how to do this in this walkthrough.

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.10 <0.9.0;

import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ITablelandTables} from "@tableland/evm/contracts/interfaces/ITablelandTables.sol";

contract CreateFromContract is ERC721, Ownable {
    mapping(string => uint256) public tables;

    ITablelandTables private _tableland;

    constructor(address registry) ERC721("TestCreateFromContract", "MTK") {
        _tableland = ITablelandTables(registry);
    }

    function create(string memory name) public payable {
        require(tables[name] == 0, "name already exists");

        // Make sure we can get table_id back from calling `create`
        uint256 tableId = _tableland.create(
            msg.sender,
            string(
                abi.encodePacked(
                    "CREATE TABLE ",
                    name,
                    "_31337 (int id, string name, string description, string external_link);"
                )
            )
        );

        tables[name] = tableId;
    }
}