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Bitcoin Core — ruimarinho

Bitcoin Core — ruimarinho is an open-source JavaScript library that sends REST and RPC requests to a Bitcoin Core instance. It exposes methods for administrative tasks, multiwallet operations, and queries about the Bitcoin network and blockchain.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Bitcoin Core — ruimarinho — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when a JavaScript application needs to communicate with a separately configured Bitcoin Core instance through REST or RPC, rather than when you need the node itself or a standalone wallet.

Who it is for

  • JavaScript developers integrating applications with Bitcoin Core.
  • Teams building administrative tools or interfaces for managing multiple Bitcoin Core wallets.
  • Developers whose applications need Bitcoin Core network or blockchain query results.

Documented uses

  • Send administrative commands to a Bitcoin Core instance through REST or RPC.
  • Direct operations to a selected wallet, including in a multiwallet setup.
  • Query Bitcoin network and blockchain information through Bitcoin Core.
Before you choose

Requirements & limits

The repository is public and documents installation with npm or Yarn. The library requires a Bitcoin Core instance for its requests; the README gives `http://localhost:8332` as the default host.

  • The library is a client layer; Bitcoin Core must be running separately with its RPC server enabled.
  • The client can be configured with host, credentials, timeout, custom headers, version and wallet.
  • Named JSON-RPC parameters are enabled by providing a version in the client configuration.
  • Large numeric results with more than 15 significant digits are returned as strings to avoid JavaScript precision loss.
  • RPC listens on localhost by default according to the README; changing binding or permitted source IPs requires Bitcoin Core configuration.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Configure a client for a Bitcoin Core instance

Set up a client with the connection details needed to send requests to Bitcoin Core.

Before you start

  • A Bitcoin Core instance with its RPC server enabled.
  • The instance host address and, when configured, RPC username and password.

Steps

  1. Create a client using the library.

  2. Set the host if the instance is not at the documented default http://localhost:8332.

  3. Provide RPC username and password when the server requires them; set a wallet name to target a particular wallet.

  4. Call a client method and handle its returned Promise.

Expected outcome

A configured client can send REST or RPC requests to the Bitcoin Core instance, with method results handled asynchronously.

Guide limitations

  • The README's default host is localhost; remote access requires Bitcoin Core RPC binding and source-IP access configuration.
  • Named JSON-RPC parameters require specifying a Bitcoin Core version in the client configuration.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
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Sources checked
17 October 2026
Original website title
ruimarinho/bitcoin-core · Official homepage title · retained in its source language
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