Here is an article on the use of Ether.JS to combine metamask with the local hardhat node provider:

Combining metamask to local hardhat node provider eters.js

Developing decentralized applications (DAPP) that require interaction with external services, such as Metamask or Web3 providers, it is crucial to connect them to the local hardhat node. In this article, we will look at how ether.js is used to achieve this connection.

Why use Ethers.js?

Ethers.js is an official JavaScript library that interacts with Ethereum Blockchain. It provides a simple and intuitive application interface to work on Web3 Ether.JS allows you to easily combine the local hardhat node without ensuring additional infrastructure or configuration.

Setting the local hardhat node

Before we dive into the metamask, make sure that the local hardhat node is set correctly. Here’s a brief description of the steps:

• Install the TRYFULI Frame: Tryffel provides a way to manage and interact with your Blockchain project using JavaScript.

• Set a new project directory and start it:

`Bash

Mkdir Metamask-Connection Example

CD Metamask-Connection Example

NPX TRYFFEL INIT

`

• Create a new contract file (eg “MyContract.sol) within the project's directory:

Solidity

Pragman solidity ^0.8.0;

Agreement MyContract {

UINT256 Public value;

}

`

• Turn and enable your contract:

`Bash

truffle

truffle

`

Combining metamask with ether.js

Now that you have a local hardhat node set, connect metamask using Ethers.js. We use the Ethers.JS library interacting with Metamask.

Create a new file called metamask-confonition.js and add the following code:

`Javascript

Const eters = demanding (‘ether);

// Set the contract address and abi

Const Compaitddress = ‘0x …’; // replace the contract with address

Const abi = […]; // replace the agreement abbi

// Create a new expression of an ether provider for your local Hardhat node

Const provider = new Ethers.Providers.httpprovider (‘http: // Localhost: 8545’);

// Create a new eetterit.js wallet using the Metamask provider

Const wallet = new etherit.wallet (service provider, ‘0x …’); // replace the metamask -private key

// Get a contract cluster using your wallet

Const Contractinstance = New Ethers.Contract (Contractionaddress, ABI, Wallet);

// Now you can use the contract -to interact with Blockchain

ContractionAstance.valu.set (123);

`

Using an example

Here is an example of how you can use a metamask connection to set a value for your contract:

`Javascript

Metamask-Connection.js

`

By assuming

`Javascript

Setvalu = (value) => {

ContractionAstance.valu.set (value);

}

`

tips and variations

• Make sure to replace the “compractionaddress”, “abbi” and “wallet” variables with a real contract address, the ABI and Metamask key.

• You can also use other ether.js offers such as http: // Localhost: 8546 orhttps: // reputation.infura.io/v3/your_project_id.

• If you use a different web3 service provider (eg web3.js), you must adjust the contact code accordingly.

By following these steps and examples, you should now be able to connect the local hardhat node with Eters.JS. Happy building!

Metamask Metamask