NERO AA Platform - Callback 機能

POST /v1/apiKey/policy/saveOrUpdate
{
  "projectId": 123,
  "policy": {
    "isCallback": true,
    "callbackUrl": "https://your-domain.com/paymaster/callback"
  }
}

API-SIGNATURE: MD5ハッシュ署名
Content-Type: application/json

{
  "sender": "0x1234...",
  "nonce": "0x1",
  "initCode": "0x",
  "callData": "0x...",
  "callGasLimit": "0x5208",
  "verificationGasLimit": "0x5208",
  "preVerificationGas": "0x5208",
  "maxFeePerGas": "0x3b9aca00",
  "maxPriorityFeePerGas": "0x3b9aca00",
  "paymasterAndData": "0x",
  "signature": "0x..."
}

{
  "status": 1 // 1: PASS, 2: NOT_PASS, 3: LIMITED
}

import { Hono } from "hono";
import { serve } from "@hono/node-server";
 
interface PaymasterSupportedToken {
  sender: string;
  nonce: string;
  initCode: string;
  callData: string;
  callGasLimit: string;
  verificationGasLimit: string;
  preVerificationGas: string;
  maxFeePerGas: string;
  maxPriorityFeePerGas: string;
  paymasterAndData: string;
  signature: string;
}
 
interface PaymasterRule {
  is_sponsored: boolean;
  is_blocked: boolean;
}
 
const paymasterRules: Map<string, PaymasterRule> = new Map([
  [
    "0x123456789abcdefghijk123456789abcdefghijk".toLowerCase(),
    { is_sponsored: true, is_blocked: false },
  ],
  // 他のアドレスルールを追加
]);
 
// ビジネスロジック判定関数
function evaluateFreeGasEligibility(sender: string): number {
  const senderLower = sender.toLowerCase();
  const rule = paymasterRules.get(senderLower);
  if (!rule) {
    console.warn("Sender address not found in rules:", sender);
    return 2; // NOT_PASS - ルールに存在しないアドレスは拒否
  }
  // default: block paymaster support
  let supportStatus = 2;
  if ([rule.is](http://rule.is)_sponsored) {
    supportStatus = 1;
  }
  if ([rule.is](http://rule.is)_blocked) {
    supportStatus = 3;
  }
  return supportStatus;
}
 
const app = new Hono()
  .post("/paymaster/callback", async (c) => {
    try {
      const userOp = (await c.req.json()) as PaymasterSupportedToken;
      console.log("=== Request received ===");
      console.log("Sender:", userOp.sender);
 
      // ビジネスロジックによる判定
      const status = evaluateFreeGasEligibility(userOp.sender);
      const statusLabel =
        status === 1 ? "PASS" : status === 3 ? "LIMITED" : "NOT_PASS";
      console.log(`Result: ${statusLabel} (status: ${status})`);
      console.log("======================\n");
 
      return c.json({ status });
    } catch (error) {
      console.error("Callback processing error:", error);
      return c.json({ status: 3 }); // LIMITED
    }
  })
  .get("/health", (c) => c.json({ status: "ok" }));
 
serve({
  fetch: app.fetch,
  port: 3000,
});
 
console.log(`Paymaster Callback server is running at http://localhost:3000`);