npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

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.

About

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 🙏

© 2026 – Pkg Stats / Ryan Hefner

@kaspa-x402/core

v1.0.1

Published

Core types and canonical encoders for Kaspa x402.

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Maintainers

kaspa-x402kaspa-x402

Keywords

Readme

@kaspa-x402/core

Transport-neutral types, codecs, canonical encoders, scheme selection, channel IDs, voucher digest helpers, MCP transport primitives, and facilitator wire types.

Status: release candidate. This package is part of a testnet-oriented reference implementation and does not imply mainnet readiness.

This package contains deterministic Kaspa x402 protocol primitives only. It does not talk to wallets, RPC nodes, facilitators, HTTP servers, MCP servers, or the filesystem.

Implemented:

  • exported TypeScript types for the public wire objects;
  • canonical sompi, network, hex, LE32, LE64, and SHA-256 helpers;
  • x402 HTTP header encoding and decoding for PAYMENT-REQUIRED, PAYMENT-SIGNATURE, and PAYMENT-RESPONSE;
  • MCP _meta key constants, payment-required result helpers, payment metadata readers, and deterministic tool-call fingerprints bound to a canonical server audience;
  • x402 v2 facilitator response and supported-kind TypeScript types, plus the local facilitator request type with mandatory independent requestHash binding for exact requests; see the local API boundary;
  • stable-covenant-ID voucher preimage and digest helpers;
  • channel ID preimage and digest helpers;
  • signed-int64 A/S/T/V/R accounting and partial-claim transition helpers;
  • schema validation via pregenerated standalone validators (Ajv at build time only, safe for runtimes that forbid dynamic code generation);
  • semantic retry validation for accepted-offer matching and payment-identifier;
  • vector-driven tests against the repository conformance fixtures.

Development

From the protocol/ workspace:

npm ci
npm --workspace @kaspa-x402/core test

The package tests consume vectors/ directly. Any implementation change that changes header bytes, voucher digests, channel IDs, settlement response validity, or stable error identifiers should update the vectors and spec in the same change.

Boundary

@kaspa-x402/core should stay pure. Covenant builders, transaction signing, RPC submission, HTTP middleware, MCP SDK integration, and facilitator endpoint implementations belong in other packages.