Ethereum: How to do sendRawTransaction to bitcoind JSON-RPC using bitcoin-core package in nodejs

Here is an article explaining how to send a RawTransaction in JSON-RPC format using the Bitcoin Core package in Node.js:

Sending Raw Transactions in JSON-RPC Format with Bitcoin Core Package in Node.js

In this article, we will show you how to send a RawTransaction in JSON-RPC format using the Bitcoin Core package in Node.js.

Prerequisites

Before we start, make sure that you have installed the Bitcoin Core package and are running a compatible version of it. Also, ensure that you have a Bitcoin Core node running on your machine with a valid address for which you want to send the raw transaction.

Install Required Packages

To use the Bitcoin Core package in Node.js, we need to install the bitcoin-core package using npm:

npm install bitcoin-core --save

Send Raw Transaction in JSON-RPC Format

The following code snippet demonstrates how to send a RawTransaction in JSON-RPC format using the Bitcoin Core package:

const BitcoinCore = require('bitcoin-core');


// Set up Bitcoin Core connection

const bc = new BitcoinCore({

  url: ' // replace with your Bitcoin Core node URL

});


// Create a new transaction object

const tx = {

  version: 1,

  hash: 'your_tx_hash_here',

  from_address: 'your_from_address_here',

  to_address: 'to_address_here', // optional

  flags: 'raw' // optional, can be one of 'full', 'confirm', or 'send-only'

};


// Create a new raw transaction object

const rawTx = {

  tx_type: 'sendrawtransaction',

  raw: tx

};


// Send the raw transaction in JSON-RPC format using Bitcoin Core

bc.sendRawTransaction(rawTx, (err, response) => {

  if (err) {

    console.error('Error sending raw transaction:', err);

  } else {

    // Get the transaction hash from the response

    const txHash = response.hash;


    console.log(Transaction hash: ${txHash});

  }

});

In this example, we create a new transaction object with the desired properties (version, hash, from address, to address, and flags). We then create a new raw transaction object with the same properties. Finally, we send the raw transaction in JSON-RPC format using the sendRawTransaction method of the Bitcoin Core connection.

Notes

• The raw property in the tx object specifies that we want to send a raw transaction.

• You can customize the raw transaction by providing additional flags (e.g., confirm, send-only) or adjusting the properties of the transaction object.

• The response from Bitcoin Core includes a hash field for each raw transaction. This hash can be used as a reference to verify the integrity of the transaction.

By following these steps, you should now be able to send raw transactions in JSON-RPC format using the Bitcoin Core package in Node.js.

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