> ## Documentation Index
> Fetch the complete documentation index at: https://docs.theblockchainlibrary.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ERC-1155 Multi-Token Contract

> A batch-mintable ERC-1155 multi-token contract using OpenZeppelin, supporting semi-fungible tokens and batch transfers.

# ERC-1155 Multi-Token Contract

A batch-mintable ERC-1155 multi-token contract using OpenZeppelin, supporting semi-fungible tokens and batch transfers.

A batch-mintable ERC-1155 multi-token contract using OpenZeppelin, supporting semi-fungible tokens and batch transfers.

## Explanation

ERC-1155 allows a single contract to manage multiple token types (fungible, semi-fungible, and NFTs) in one deployment. The \_mintBatch function lets you mint multiple token IDs in a single transaction, saving gas over separate mints.

## Code

```solidity theme={null}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract GameItems is ERC1155, Ownable {
    uint256 public constant GOLD = 0;
    uint256 public constant SWORD = 1;
    uint256 public constant SHIELD = 2;

    constructor() ERC1155("https://game.example/api/item/{id}.json") Ownable(msg.sender) {
        _mint(msg.sender, GOLD, 10_000 ether, "");
        _mint(msg.sender, SWORD, 100, "");
        _mint(msg.sender, SHIELD, 50, "");
    }

    function mintBatch(address to, uint256[] memory ids, uint256[] memory amounts) external onlyOwner {
        _mintBatch(to, ids, amounts, "");
    }
}
```

***

**Canonical knowledge ID:** `code-example:erc-1155-multi-token-contract`