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@make-software/casper-x402

v1.0.0

Published

x402 Payment Protocol Casper Implementation for JavaScript

Vulnerabilities

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Links

Git

Maintainers

burlachenkoburlachenkomichaelsteuermichaelsteuerdavidatwhiletruedavidatwhiletrueyevhenbilovyevhenbilov

Keywords

x402paymentprotocolcasper

Readme

@make-software/casper-x402

A TypeScript implementation of the x402 payment protocol for the Casper Network. It adds Casper as a supported network to the x402 ecosystem so HTTP APIs can require micropayments settled on-chain using CEP-18 tokens authorized via EIP-712 signatures.

This package is published as @make-software/casper-x402.

What is x402?

x402 is an open standard for internet-native payments over HTTP. When a client requests a paid resource:

  1. The resource server responds with 402 Payment Required plus PaymentRequirements describing accepted networks, schemes, prices and assets.
  2. The client builds a PaymentPayload — an EIP-712 signed authorization — and replays the request with a PAYMENT-SIGNATURE header.
  3. The resource server forwards the payload to a facilitator for verification and, on success, for on-chain settlement.
  4. The facilitator submits a Casper transfer_with_authorization deploy to the CEP-18 contract and waits for confirmation.
  5. The resource server returns the protected response.

This package implements the exact scheme on the casper:* CAIP-2 family, backed by the casper-ecosystem/casper-eip-712 typed-data specification.

Installation

npm install @make-software/casper-x402

Peer / transitive dependencies include @x402/core, casper-js-sdk and @casper-ecosystem/casper-eip-712.

Entry points

The package exposes a root entry with signer helpers and utilities, plus three subpaths for the exact scheme.

| Entry | Purpose | | --- | --- | | @make-software/casper-x402 | Signers, types, constants and utilities | | @make-software/casper-x402/exact/client | ExactCasperScheme for clients | | @make-software/casper-x402/exact/server | ExactCasperScheme and registration for resource servers | | @make-software/casper-x402/exact/facilitator | ExactCasperScheme and registration for facilitators |

Network identifiers

Casper networks use CAIP-2 format:

  • casper:casper — Casper Mainnet
  • casper:casper-test — Casper Testnet

These are exported as NETWORK_CASPER_MAINNET and NETWORK_CASPER_TESTNET from the package root.

Examples

Runnable examples are available in the casper-x402 monorepo under examples/.

License

This project is licensed under the Apache License 2.0.