Bitcoin: After signing a message, how to verify the signature with JavaScript/TypeScript?

Checking signatures use JavaScript/Typescript at Bitcoin nodes

In order to check the user’s message signing the Bitcoin node, we must mutated stock the corresk corres and from the vertical yemptry key. In In thist art, we disscuss how to do thising JavaScript/Typescript.

##t setting the environment

Before we start, make supreme node.js is installed on youryour system. We trust the “Crypto” module to a user’s message Sha-256 hus.

Javascript

Const crypto = requires (’crypto’);

Message Signature with Bitcoin-JS

Bitcoin-JS is a irrelood of that dat here allows use to interact with Bitcoin nodes. We cann a message this directory:

Javascript

Assyc Function signature (node, message) {

Const Privatey = Waiting for Node.getPrivatey ();

Constation Sigantures = Waiting for Priviátey.sign (msusage);

reputation;

}

Verification of signature a bitecoin node

After signing the mesage with Bitcoin-JS, we need to check a bitcoin node. For this puppe, we will be using the  Bitcoinjs-Lib’ directory.

Javascript

Const Bitcoinjslib = neeed (’Bitcoinjs-Lib’);

Anselss of Varifysignature (node, signature, message, message) {

CONST PublicKey = Waiting for Node.gePublickey ();

consvaluated = wait for bitcoinjslib.verifying (signature, publicly, message, message);

Returns;

}

exactly

He’s an exactly of using features:

Javascript

constinent Bitcoinnode = ‘

CONST PRIVATATEY = Waiting for Bitcoinnode.getPrivatey ();

// sign the message with Bitcoin-JS

Signmeage (Bitcoinnode, sign thisssage to justify the wall in possession of “(Err, Signaturature) => {{{{{{ appeared

iif (er) console.orr (ERR);

otherwise {

CONST PublicKey = Waiting for Bitcoinoy.get publicy ();

Const Isval = Verified = Verifying (Bitcoinnode, Signature, “Select this message to provet the wallet owner);

console.log (isvalid); // mut bench

}

^)

mistake

It’s essential to properal to the use of Bitcoin-JS. We can do do this by catching the day exams.

Javascript

Signssage (Bitcoinode, sign thissage to justify the purse the purse the purse the purse => {{{{{{er

iif (er) console.orr (ERR);

^)

`

By folling the steps and exams, you can check the user’s monthly ceremony ceremony with the bitcoin node.