# Robinhood Chain 测试网入门：免 key 读数据、WebSocket 订阅、再切主网

> 原文地址: https://docs.blockvectra.com/zh/guides/robinhood-testnet-starter/

BlockVectra 为 Robinhood Chain 测试网（链 ID 46630）提供 JSON-RPC 与 WebSocket 访问，同一把 API key 也能用于 Robinhood Chain 主网。本指南按 [Robinhood Chain 测试网入门模板](https://github.com/blockvectra/robinhood-testnet-starter?ref=docs-testnet-starter) 的三步走：免 key 读测试网、程序化开户并订阅 logs、再把同一把 key 切到主网。端点参数、方法策略与代币化股票数据见 [Robinhood Chain 指南](https://docs.blockvectra.com/zh/guides/robinhood-chain/)。

## 运行模板

```bash
git clone https://github.com/blockvectra/robinhood-testnet-starter
cd robinhood-testnet-starter
npm install
npm run typecheck
```

需要 Node.js 18 及以上。三个脚本分别是 `npm run step1`、`npm run step2` 和 `npm run step3`。可选变量（`BLOCKVECTRA_API_KEY`、`WALLET_PRIVATE_KEY`）从 shell 读取（模板不自动加载 `.env`）。

## 第 1 步：免 key 读测试网

公开端点 `https://api.blockvectra.com/v1/robinhood_testnet/public` 提供钱包类 JSON-RPC 方法，无需账户与 API key。直接查询 EIP-155 链 ID：

```bash
curl -s "https://api.blockvectra.com/v1/robinhood_testnet/public" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_chainId","params":[]}'
```

返回为 `{"jsonrpc":"2.0","id":1,"result":"0xb626"}`；`0xb626` 是十六进制链 ID，即十进制的 46630。

模板从 `GET /v1/chains` 读取链信息并据此构造 viem 客户端，链名与链 ID 都不写死。`src/shared.ts`：

```ts
import { createPublicClient, defineChain, http, webSocket } from "viem";

export const API_BASE = "https://api.blockvectra.com/v1";

export interface ChainEntry {
  chain: string;
  name: string;
  chain_id: number;
  data: boolean;
  ws: boolean;
  subscriptions: string[];
  public?: { url: string };
}

export async function getChain(slug: string): Promise<ChainEntry> {
  const res = await fetch(`${API_BASE}/chains`);
  if (!res.ok) throw new Error(`GET /v1/chains failed: ${res.status}`);
  const { chains } = (await res.json()) as { chains: ChainEntry[] };
  const entry = chains.find((c) => c.chain === slug);
  if (!entry) throw new Error(`${slug} not found in /v1/chains`);
  return entry;
}

export function toViemChain(entry: ChainEntry, rpcUrl: string) {
  return defineChain({
    id: entry.chain_id,
    name: entry.name,
    nativeCurrency: { name: "Ether", symbol: "ETH", decimals: 18 },
    rpcUrls: { default: { http: [rpcUrl] } },
  });
}

export function httpClient(entry: ChainEntry, url: string, apiKey?: string) {
  return createPublicClient({
    chain: toViemChain(entry, url),
    transport: http(url, apiKey ? { fetchOptions: { headers: { "x-api-key": apiKey } } } : undefined),
  });
}

export function wsClient(entry: ChainEntry, apiKey: string) {
  const base = "wss://api.blockvectra.com/v1";
  const url = `${base}/${entry.chain}/${apiKey}`;
  return createPublicClient({ chain: toViemChain(entry, url), transport: webSocket(url) });
}
```

在此基础上，`src/step1-public-read.ts` 读取链 ID、最新区块与某地址余额：

```ts
import { formatEther, type Address } from "viem";
import { API_BASE, getChain, httpClient } from "./shared.js";

const SLUG = "robinhood_testnet";
// 任意地址均可；也可用第一个命令行参数覆盖。
const address = (process.argv[2] ?? "0x0000000000000000000000000000000000000000") as Address;

const chain = await getChain(SLUG);
const client = httpClient(chain, `${API_BASE}/${SLUG}/public`);

const [chainId, blockNumber, balance] = await Promise.all([
  client.getChainId(),
  client.getBlockNumber(),
  client.getBalance({ address }),
]);

console.log(`chain       : ${chain.name} (${SLUG})`);
console.log(`eth_chainId : ${chainId} (0x${chainId.toString(16)})`);
console.log(`block       : ${blockNumber}`);
console.log(`balance     : ${formatEther(balance)} ETH  (${address})`);
```

## 第 2 步：程序化开户并订阅 logs

`src/step2-key-and-logs.ts` 在 `https://console-api.blockvectra.com/v1` 用钱包签名（SIWE，EIP-191）登录。首次登录会自动开户，随后客户端创建 API key。新账户注册即得 3,000 万 CU，无需信用卡。

```ts
import { generatePrivateKey, privateKeyToAccount } from "viem/accounts";
import type { Hex } from "viem";

const CONSOLE_API = "https://console-api.blockvectra.com/v1";
const REF = "gh-robinhood-testnet-starter";

async function post<T>(path: string, body: unknown, token?: string): Promise<T> {
  const res = await fetch(`${CONSOLE_API}${path}`, {
    method: "POST",
    headers: { "Content-Type": "application/json", ...(token ? { Authorization: `Bearer ${token}` } : {}) },
    body: JSON.stringify(body),
  });
  if (!res.ok) throw new Error(`${path} failed: ${res.status} ${await res.text()}`);
  return (await res.json()) as T;
}

async function provisionKey(): Promise<string> {
  const pk = (process.env.WALLET_PRIVATE_KEY as Hex | undefined) ?? generatePrivateKey();
  const account = privateKeyToAccount(pk);
  console.log(`wallet: ${account.address}`);

  // SIWE：先取挑战消息，原样签名（EIP-191）后登录；首次登录会创建账户。
  const { message } = await post<{ message: string }>("/auth/siwe/challenge", {
    address: account.address,
    purpose: "login",
  });
  const signature = await account.signMessage({ message });
  const login = await post<{ session: { token: string }; account_created: boolean }>("/auth/siwe/login", {
    message,
    signature,
    ref: REF,
  });
  console.log(`account_created: ${login.account_created}`);

  const created = await post<{ api_key: string }>("/keys", { label: "robinhood-testnet-starter" }, login.session.token);
  return created.api_key;
}

const apiKey = process.env.BLOCKVECTRA_API_KEY?.trim() || (await provisionKey());
```

已有 key 时，`export BLOCKVECTRA_API_KEY=...` 会跳过开户。不设置 `WALLET_PRIVATE_KEY` 时，脚本会在内存里生成一次性钱包，运行结束即丢弃；想再次登录同一账户，请从本地环境变量提供 `WALLET_PRIVATE_KEY`。

WebSocket URL 把 key 放在路径中：`wss://api.blockvectra.com/v1/robinhood_testnet/{api_key}`。模板在订阅前会检查 `GET /v1/chains` 返回的 `ws` 标记与 `subscriptions` 列表：

```ts
const chain = await getChain("robinhood_testnet");
if (!chain.ws || !chain.subscriptions.includes("logs")) {
  throw new Error(`robinhood_testnet does not offer a logs subscription in /v1/chains`);
}
console.log(`subscriptions (from /v1/chains): ${chain.subscriptions.join(", ")}`);

const client = wsClient(chain, apiKey);
const stop = client.watchEvent({
  address: "0x1234567890123456789012345678901234567890",
  onLogs: (logs) => {
    for (const l of logs) console.log(`block ${l.blockNumber} ${l.address} topic0=${l.topics[0]}`);
  },
  onError: (e) => console.error("subscription error:", e.message),
});
```

每个 `logs` 订阅过滤器必须包含 `address` 或 `topic0`；请把示例地址替换成你要监听的合约。过滤规则、关闭码与重连策略见 [WebSocket 订阅指南](https://docs.blockvectra.com/zh/guides/websocket-subscriptions/)。

## 第 3 步：把同一把 key 切到主网

切到主网就是把链名改成 `robinhood_mainnet`，key 不变。`src/step3-mainnet.ts` 读取主网区块高度，并调用 Robinhood 股票代币的 Data API：

```ts
const apiKey = process.env.BLOCKVECTRA_API_KEY?.trim();
if (!apiKey) throw new Error("Set BLOCKVECTRA_API_KEY (run step 2 first, or create a key in the console).");

const mainnet = await getChain("robinhood_mainnet");

// 带 key 的 JSON-RPC：链名换成主网即可。
const client = httpClient(mainnet, `${API_BASE}/${mainnet.chain}`, apiKey);
console.log(`mainnet block: ${await client.getBlockNumber()}`);

// Data API：Robinhood 股票代币活跃榜单（见 Robinhood Chain 指南）。
const res = await fetch(`${API_BASE}/data/${mainnet.chain}/stocks`, { headers: { "x-api-key": apiKey } });
if (!res.ok) throw new Error(`Data API failed: ${res.status} ${await res.text()}`);
console.log(JSON.stringify(await res.json(), null, 2).slice(0, 2000));
```

同一个榜单端点的 curl：

```bash
curl -s -H "x-api-key: $BLOCKVECTRA_API_KEY" \
  "https://api.blockvectra.com/v1/data/robinhood_mainnet/stocks"
```

主网提供 Data API，测试网没有：`GET /v1/chains` 中 `robinhood_testnet` 的 `data` 为 `false`，`robinhood_mainnet` 的 `data` 为 `true`。请求参数与响应外层结构见 [代币化股票指南](https://docs.blockvectra.com/zh/guides/stocks/)。

## 从接口读取限额与能力

用 `GET /v1/chains` 读取实时的 `jsonrpc`、`data`、`ws`、`subscriptions` 标记、开放的 JSON-RPC 方法、日志区块跨度、状态保留窗口以及各链的公开端点；用 `GET /v1/plans` 读取当前价格与方案限额。

```bash
curl -s "https://api.blockvectra.com/v1/chains"
```

## 下一步

* [浏览数据集目录](https://blockvectra.com/zh/data/)，查看 BlockVectra 索引的全部数据集。
* [查看免费额度与定价](https://blockvectra.com/zh/pricing/#free)，确认账户可用的方案。
* [登录控制台](https://console.blockvectra.com/zh/login/?next=%2Fzh%2Fkeys%2F)创建 API key。