createX402Handler

createX402Handler(params): X402RequestHandler

Defined in: src/x402/server.ts:212

Builds an X402RequestHandler that wraps params.handler with the x402 payment flow.

Parameters

params

CreateX402HandlerParams

Returns

X402RequestHandler

Example

import { createServer } from "node:http";
import { parseUnits } from "viem";
import {
  buildPaymentRequirements,
  createSelfFacilitator,
  createX402Handler,
  JPYC_DECIMALS,
  JPYC_V2_ADDRESS,
  polygonAmoy,
} from "kawasekit";

const handler = createX402Handler({
  facilitator: createSelfFacilitator({ walletClient, publicClient }),
  requirementsFor: (req) =>
    new URL(req.url).pathname.startsWith("/weather")
      ? [buildPaymentRequirements({
          chainId: polygonAmoy.id,
          asset: JPYC_V2_ADDRESS,
          payTo: "0x...",
          amount: parseUnits("0.001", JPYC_DECIMALS),
        })]
      : null,
  handler: async (req) => new Response(JSON.stringify({ weather: "sunny" }), {
    headers: { "content-type": "application/json" },
  }),
});

// Mount on any framework that exposes WHATWG Request → Response.