ngundotra

x402 on Solana: Permanent Delegate Flow

Flow Diagram

sequenceDiagram
    participant User as User<br/>(Has: Wallet, xUSDC)<br/>(Knows: Sign messages)
    participant Client as Client App<br/>(x402 SDK)
    participant Server as Resource Server<br/>(Has: Solana wallet)<br/>(Knows: Basic web)
    participant Facilitator as Facilitator<br/>(Has: Permanent Delegate)<br/>(Knows: Solana txs)

ngundotra

Surfpool RPC Response Parsing Error

Issue Description

When sending transactions that result in errors through surfpool, the Python solana-py client crashes with a panic instead of handling the error gracefully:

thread '<unnamed>' panicked at crates/rpc-responses/src/lib.rs:363:84:
called `Result::unwrap()` on an `Err` value: Error("missing field `data`", line: 0, column: 0)

ngundotra

{
    "connector": {
        "id": "connector_6849e5b098d4819183df84983fb13a6e",
        "created_at": "2025-06-11T20:23:12.597222Z",
        "connector_type": "MCP",
        "name": "Solana Developer Resources",
        "description": "Returns the most up to date resources for documentation across the Solana ecosystem",
        "service": "https://mcp.solana.com",
        "logo_url": null,
        "logo_url_dark": null,

ngundotra

[
  {
    "key": "def_valueBasedHealthCare",
    "title": "Value-Based Health Care",
    "definition": "Value-based health care, which focuses on measuring health outcomes and costs",
    "lines": [
      "3-4"
    ],
    "article_id": "9b72d5ebf17648c3a68e95fa57f1542b",

ngundotra

[
  {
    "catalogType": "definitions",
    "items": [
      {
        "key": "Def_0to1Innovation",
        "title": "0 to 1 Innovation",
        "definition": "Intensive progress involves going from 0 to 1 (not simply the 1 to n of globalization).",
        "lines": [
          "assay3:41",

ngundotra

{"kind":"rootNode","standard":"codama","version":"1.2.0","program":{"kind":"programNode","name":"lighthouse","publicKey":"L2TExMFKdjpN9kozasaurPirfHy9P8sbXoAN1qA3S95","version":"2.0.0","origin":"shank","docs":[],"accounts":[],"instructions":[{"kind":"instructionNode","name":"memoryWrite","docs":[],"optionalAccountStrategy":"programId","accounts":[{"kind":"instructionAccountNode","name":"programId","isWritable":false,"isSigner":false,"isOptional":false,"docs":["Lighthouse program"],"defaultValue":{"kind":"programIdValueNode"}},{"kind":"instructionAccountNode","name":"systemProgram","isWritable":false,"isSigner":false,"isOptional":false,"docs":["System program"],"defaultValue":{"kind":"publicKeyValueNode","publicKey":"11111111111111111111111111111111","identifier":"splSystem"}},{"kind":"instructionAccountNode","name":"payer","isWritable":true,"isSigner":true,"isOptional":false,"docs":["Payer account"],"defaultValue":{"kind":"payerValueNode"}},{"kind":"instructionAccountNode","name":"memory","isWritable":true,"i

ngundotra

import {
  address,
  createSolanaRpc,
  getBase58Decoder,
  getBase58Encoder,
  signature,
} from "@solana/web3.js";
import { parseInstructionData } from "@codama/dynamic-parsers";
import { readFileSync } from "fs";

ngundotra

import { AnchorProvider, Wallet } from "@project-serum/anchor";
import {
  Connection,
  Keypair,
  MessageV0,
  PublicKey,
  TransactionInstruction,
  VersionedMessage,
  VersionedTransaction,
  AccountMeta,

ngundotra

{
    "version": "0.1.0",
    "name": "governance",
    "instructions": [
        {
            "name": "createRealm",
            "accounts": [
                {
                    "name": "governanceRealmAccount",
                    "isMut": true,

ngundotra

import { Metaplex, keypairIdentity, bundlrStorage } from '@metaplex-foundation/js';
import { Connection, Keypair, clusterApiUrl } from '@solana/web3.js';
import { readFileSync } from 'fs';

async function sleep(delay: number) {
    return new Promise((resolve) => {
        setTimeout(() => resolve(null), delay);
    });
}