@armory-sh/middleware-next

# npm
npm install @armory-sh/middleware-next

# yarn
yarn add @armory-sh/middleware-next

# pnpm
pnpm add @armory-sh/middleware-next

# bun
bun add @armory-sh/middleware-next

// middleware.ts
import { paymentProxy, x402ResourceServer } from "@armory-sh/middleware-next";

const verificationClient = {
  async verify(headers: Headers) {
    return { success: true, payerAddress: "0x..." };
  },
};

const resourceServer = new x402ResourceServer(verificationClient);

export const proxy = paymentProxy(
  {
    "/api/protected": {
      accepts: {
        scheme: "exact",
        price: "1000000",
        network: "eip155:8453",
        payTo: "0xYourAddress...",
      },
    },
  },
  resourceServer
);

export const config = { matcher: ["/api/protected/:path*"] };

interface VerificationClient {
  verify(headers: Headers): Promise<{
    success: boolean;
    payerAddress?: string;
    error?: string
  }>;
  settle?(headers: Headers): Promise<{
    success: boolean;
    txHash?: string;
    error?: string
  }>;
}

interface PaymentScheme {
  name: string;
  getRequirements(): PaymentRequirementsV2;
}

interface RoutePaymentConfig {
  accepts: {
    scheme: string;
    price: string;
    network: string;
    payTo: string;
  };
  description?: string;
}

import { paymentMiddleware } from "@armory-sh/middleware-next";

const middleware = paymentMiddleware({
  payTo: "0x1234567890123456789012345678901234567890",
  chains: ["base", "skale-base"],
  tokens: ["usdc", "usdt", "weth", "wbtc"],
  amount: "1.0",
  facilitatorUrl: "https://fallback-facilitator.example",
  facilitatorUrlByChain: {
    base: "https://payai.example",
  },
  facilitatorUrlByToken: {
    base: { usdc: "https://payai.example" },
    "skale-base": {
      usdc: "https://payai.example",
      usdt: "https://kobaru.example",
      weth: "https://kobaru.example",
      wbtc: "https://kobaru.example",
    },
  },
  extensions: {
    bazaar: { info: { input: { sku: "pro-plan" } }, schema: { type: "object" } },
    "sign-in-with-x": { info: { domain: "api.example.com" }, schema: { type: "object" } },
  },
});

paymentMiddleware({
  requirements: [
    {
      scheme: "exact",
      network: "eip155:8453",
      amount: "1000000",
      asset: "0x833589fCD6eDb6E08f4c7C32D4f71B54bdA02913",
      payTo: "0x1234567890123456789012345678901234567890",
      maxTimeoutSeconds: 300,
    },
    {
      scheme: "exact",
      network: "eip155:1187947933",
      amount: "2500000",
      asset: "0x5f9beea3f6f22be1f4f8efc120f5095f58dbb8a2",
      payTo: "0x1234567890123456789012345678901234567890",
      maxTimeoutSeconds: 300,
    },
  ],
  facilitatorUrlByToken: {
    base: { usdc: "https://payai.example" },
    "skale-base": { usdt: "https://kobaru.example" },
  },
});