ERC1115

// contracts/GameItems.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {ERC1155} from "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";

contract GameItems is ERC1155 {
    uint256 public constant GOLD = 0;
    uint256 public constant SILVER = 1;
    uint256 public constant THORS_HAMMER = 2;
    uint256 public constant SWORD = 3;
    uint256 public constant SHIELD = 4;

    constructor() ERC1155("https://game.example/api/item/{id}.json") {
        _mint(msg.sender, GOLD, 10**18, "");
        _mint(msg.sender, SILVER, 10**27, "");
        _mint(msg.sender, THORS_HAMMER, 1, "");
        _mint(msg.sender, SWORD, 10**9, "");
        _mint(msg.sender, SHIELD, 10**9, "");
    }
}

// Example of metadata for THORS_HAMMER (id = 2)
{
    "name": "Thor's Hammer",
    "description": "A legendary hammer wielded by Thor, the god of thunder.",
    "image": "https://game.example/images/thors_hammer.png"
}