Metamask: Can we sign and send transaction through Metamask on behalf of backend (nodeJs)

The transaction company through Metamsk in Nodejs

When you build a decentralized app (DAPP) using Web3.JS, a popular javascript library to interact with Ethereum Blockchain, you should consider how to sign and send transactions from its border . In this article, we will explore the equivalent of signing transactions by metamark in Nodejs.

What is metamk?

Metask is a popular extension for Chrome that allows users to administer their ETHREUM wallet. It offers a simple way to store and manage its private keys, which allows you to interact with decentralized applications (DAPP) without exposing confidential information. When it comes to signing transactions through Metask in Nodejs, we will focus on the Backend aspect of this process.

The transaction company via Web3.JS

To sign transactions through Web3.JS, you must create a new instance of the web3 supplier using the “Web3” library. Then use the “Signsction” method to sign the transaction data.

Here is a code fragment for example:

`JavaScript



const web3 = requires ('web3');

// configure -va 3 (eg, infura, metamsk) web 3

Const a supplor = new web3.providers.httprovider ('

// create a new instance of the web3 supplier

Consist web3instance = new web3 (supplier);

// Define transaction data

Constacciondata = {

  A: '0xsomeaddress', // the addressee address

  Value: "1 Ether", // the quantity of transaction

  Gaslimit: '20', // the gas limit for the transaction

  Chainid: 1, // Ethereum Network ID (Mainnet)

};

// sign your transaction using Web3

Web3instance.Signransction (traded) .Shen ((sigrammransction) => {

  Console.log ('signed transaction:', signed);

});

In this example, we create a new instance of the Web3 supplier and use it to sign a data object for transactions. The “Signtransction” method returns a signed transaction object, which you can use to send its transaction.

equivalent to signing by metamsk

By signing transactions through Metamsk in Nodejs, you need to configure a backynd service that allows users to interact with the Ethereum Border Launch chain (web application). Here are some possible steps:

Create a new Nodejs server

: Configure a new Nodejs server using express.js or another frame of your choice.

Store the private user’s private keys : Store the private Safe Metamk Api -Metamk’s private keys.

Generate signature accreditations
: generate signature credentials for each user who recovers their private keys from the safe keys storage.

Signs transactions using signature credentials : Use signature credentials generated to sign transactions in the backdly service.

Here is a code fragment for example:

“ JavaScript

Const express = require (‘express’);

const app = express ();

const web3 = requires (‘web3’);

// configure the Ethereum supplier and generate signature credentials

Const a supplor = new web3.providers.httprovider (‘

CONSTRIVATEKESYS = wait fetchuserivateys (); // recover the private user’s keys from safe keys storage service

// Create a new web3 instance and configure the Ethereum supplier

Consist web3instance = new web3 (supplier);

const firmingcredials = generatoSigningcredentials (userprivatekeys);

// sign transactions using signature credentials

App.post (‘/firm-transaction’, (req, res) => {

Constacciondata = Req.Body;

Web3instance.Signransction (traded, sense

console.

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