MetaMask Integration: ERC-1155 Interface for Mobile App
As a developer of an ERC-1155 compliant contract that issues one NFT per use, you have likely implemented the token portion using OpenZeppelin’s ERC-1155 standard. Now it’s important to ensure seamless integration with the MetaMask mobile wallet, allowing users to manage their digital assets and access your contract.
Getting Started
To add an ERC-1155 interface with MetaMask mobile, follow these steps:
- Install the MetaMask Wallet App
: First, you need to download and install the official MetaMask Wallet app for Android or iOS. This will allow users to interact with your contract on their mobile devices.
- Create a New Contract
: Create a new contract that uses the ERC-1155 standard. You can do this by importing the OpenZeppelin ERC-1155 library into your Solidity code and defining the interface using the
IERC1155
struct.
- Configure MetaMask Integration: When you create your contract, you will need to add a
MetaMask
interface. This interface will allow users to interact with your contract in MetaMask.
Sample Code
Here is an example of how you can define a MetaMask
interface in Solidity:
pragma solidity ^0.8.0;
import " ERC1155.sol";
contract MyContract {
use ERC1155 for ERC1155;
struct MetaMaskInterface {
public address to;
uint256 public number;
mapping (address => uint256) public values;
}
function addNFT(uint256 _id, address _owner) public ERC1155(MetaMaskInterface(_id), _owner) {
// Add the NFT to your contract's repository
}
}
Adding the MetaMask interface
When creating your contract, you will need to add the MetaMask
interface. This can be done by importing the OpenZeppelin ERC-1155 library and defining the MetaMaskInterface
struct using the provided example.
For example:
pragma solidity ^0.8.0;
import " ERC1155.sol";
import "
contract MyContract {
using ERC1155 for ERC1155;
using AddressMapping for AddressMapping;
struct MetaMaskInterface {
public address to;
uint256 public number;
mapping (address => uint256) public values;
}
function addNFT(uint256 _id, address _owner) public ERC1155(MetaMaskInterface(_id), _owner) {
// Add an NFT to your contract's repository
}
}
Using MetaMask with your contract
Once you’ve added the MetaMask
interface to your contract, users can interact with it on their mobile devices. They will need to download and install the MetaMask wallet app, then link their account to your contract.
When a user adds an NFT using your contract, they will be able to see its details, including the amount of tokens stored in their Metamask wallet. You can also use this interface to implement features such as:
- Token Write: Allow users to write their existing NFTs by adding them to MetaMask and triggering a function.
- NFT Redeem: Allow users to redeem their NFTs for ETH or other fiat currencies using MetaMask.
By following these steps, you can integrate your ERC-1155-compliant contract with the MetaMask mobile wallet, providing users with a seamless experience for managing their digital assets.