@castaisdk/x402

Casper support for x402 exact payments.

Install

bun add @castaisdk/x402 @x402/core casper-js-sdk

Server

import { HTTPFacilitatorClient, x402ResourceServer } from "@x402/core/server";
import { registerExactCasperScheme } from "@castaisdk/x402/server";

const server = new x402ResourceServer(
  new HTTPFacilitatorClient({ url: process.env.FACILITATOR_URL })
);

registerExactCasperScheme(server, {
  networks: ["casper:testnet"],
});

Client

import { x402Client } from "@x402/core/client";
import { registerExactCasperClientScheme } from "@castaisdk/x402/client";

const client = new x402Client();

registerExactCasperClientScheme(client, {
  networks: ["casper:testnet"],
  privateKeyPem: process.env.CASPER_PRIVATE_KEY_PEM,
});

Facilitator

import { x402Facilitator } from "@x402/core/facilitator";
import { registerExactCasperFacilitatorScheme } from "@castaisdk/x402/facilitator";

const facilitator = new x402Facilitator();

registerExactCasperFacilitatorScheme(facilitator, {
  networks: ["casper:testnet"],
});

Payment Payload

The client submits a real Casper deploy and sends its hash as the x402 payload:

{
  type: "deployHash",
  deployHash: "..."
}

The facilitator verifies:

| Check | Rule | |---|---| | Network | casper:mainnet or casper:testnet | | Scheme | exact | | Asset | CSPR | | Amount | Matches required motes | | Recipient | Matches payTo public key or account hash | | Execution | Casper RPC reports executed deploy data |

Supported Networks

| x402 network | Casper chain name | Asset | |---|---|---| | casper:mainnet | casper | CSPR | | casper:testnet | casper-test | CSPR |