npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details


  • User packages



Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.


Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner




A library for performing elliptic curve operations on the secp256k1 curve. It is designed to integrate into the BitcoinJS & BitcoinerLAB ecosystems and uses the audited noble-secp256k1 library. It is compatible with environments that do not support WASM,





@bitcoinerlab/secp256k1 is a Javascript library for performing elliptic curve operations on the secp256k1 curve. It is designed to integrate into the BitcoinJS and BitcoinerLAB ecosystems and uses the audited noble-secp256k1 library, created by Paul Miller.

This library is compatible with environments that do not support WebAssembly, such as React Native.


  • Compatible with BitcoinJS ecpair and bip32 Factory functions.
  • Based on audited code @noble/secp256k1.
  • Can be used in environments that do not support WASM, such as React Native.
  • Uses the same tests as tiny-secp256k1.


To install the package, use npm:

npm install @bitcoinerlab/secp256k1



This implementation follows the tiny-secp256k1 API. Please refer to tiny-secp256k1 for documentation on the methods.

These methods are not yet implemented: signRecoverable, recover, xOnlyPointAddTweakCheck. They are not used in ecpair or bip32, though.


You can test the examples in this section using the online playground demo available at

import ecc from '@bitcoinerlab/secp256k1';
import { BIP32Factory } from 'bip32';
import { ECPairFactory } from 'ecpair';
const BIP32 = BIP32Factory(ecc);
const ECPair = ECPairFactory(ecc);

const keyPair1 = ECPair.fromWIF(
const node = BIP32.fromBase58(

Usage with React Native

@noble/secp256k1 uses Javascript BigInt, which is fully supported in React Native on iOS. However, to use it on Android, you must make sure you use the Hermes Javascript Engine, available from RN-0.70 release.

Authors and Contributors

The project was initially developed and is currently maintained by Jose-Luis Landabaso. Contributions and help from other developers are welcome.

Here are some resources to help you get started with contributing:

Building from source

To download the source code and build the project, follow these steps:

  1. Clone the repository:
git clone
  1. Install the dependencies:
npm install
  1. Build the project:
npm run build

This will build the project and generate the necessary files in the dist directory.


Before committing any code, make sure it passes all tests by running:

npm run test


This project is licensed under the MIT License.


Thanks to Paul Miller for creating and maintaining the noble-secp256k1 library, upon which this library is based.

Thanks to the BitcoinJS team for creating and maintaining the BitcoinJS ecosystem, including the ecpair and bip32 libraries, which this library is designed to integrate with.

Thanks to the tiny-secp256k1 team for creating and maintaining the tiny-secp256k1 library, which this library uses for testing.