# ERC 1155 ``` // contracts/GameItems.sol // SPDX-License-Identifier: MIT pragma solidity ^0.6.0; import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.2.0/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; uint256 public constant BABYPIG = 5; constructor() public ERC1155("https://abcoathup.github.io/SampleERC1155/api/token/{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, ""); _mint(msg.sender, BABYPIG, 1, ""); } } ```