Signing transactions with Web3.js via Metamask: Step by step

As a developmental construction-based applications, you are likely to know the concept of interaction with blockchain. However, the programmed implementation of transactions can be a challenge within the web application. In this article, you guide you to sign transactions using Web3.Js and inject the Metamask features into the browser to facilitate the execution of a secure transaction.

Prerequisites

Before you continue, make sure that:

• Javascript, HTML and CSS have basic knowledge.

• You installed Node.js and NPM on the system (the package manager for node.js).

• He set up a blockchain-based project, including the contract implementation and the background server.

Step 1: Set metamaskk

Metamask is a browser extension that allows users to manage their digital tools, including private keys and wallet titles. To use Metamask with Web3.Js:

• Install the Metamask browser extension.

• Create an account on Metamask by entering E -Mail and creating a password.

• Enable the Web3 extension in your browser settings.

Step 2: Set Web3.js

Web3.js is a popular JavaScript directory to interact with Ethereum blockchain. To use ::

• Install Node.js and NPM (as mentioned earlier).

• Create a new Node.js project using npm init.

• Initiates the project by running “NPM installation on Web3” at the terminal.

• Import the application of web3.js in the application: CONST Web3 = Need ('Web3').

Step 3: Inject Metamask functionality into your browser

To inject the Metamask function, you need to be in the browser:

• Create a new file called index.html" and add the following code:

html

Metamask Sign Transaction

Check the transaction with Metamask with Web3.js