01 · Read a Stock Token price (viem only)

The "hello chain" baseline. Connect to Robinhood Chain mainnet, read one tokenized stock's Chainlink price feed, print the price — using nothing but viem. No SDK. This is the raw version so you can see exactly what hoodchain does for you in three lines.

What it proves: the chain is a normal EVM L2 (chain ID 4663), viem ships its official chain definition (import { robinhood } from 'viem/chains'), and every Stock Token has a live Chainlink latestRoundData() feed.

Prerequisites

• Node ≥ 20. No wallet, no key, no funds — public RPC reads only.

Run

npm install
npm start            # AAPL
node index.js NVDA   # or TSLA, NVDA

Expected output

Robinhood Chain (4663) — block 7729451
AAPL token 0xaF3D76f1834A1d425780943C99Ea8A608f8a93f9
  Chainlink feed 0x6B22A786bAa607d76728168703a39Ea9C99f2cD0
  price: $315.50  (answer age 39.3h)

Note: Robinhood feeds are already corporate-action adjusted — this is the
total-return token price, not the raw share price. See example 03.

(Captured live. Feeds follow US market hours 24/5, so a weekend read shows an answer that is a day or two old — that is expected, not stale.)

Why the "already adjusted" note matters

Robinhood's Chainlink feeds return the total-return token price, with the ERC-8056 uiMultiplier() corporate-action factor already applied upstream. The number one bug in third-party trackers is multiplying the feed price by the multiplier a second time. Don't. Example 03 shows the correct math for share-equivalent balances.

The awkward part (and the fix)

This baseline hard-codes token + feed addresses for a handful of symbols. There are 95 Stock Tokens. Maintaining that table by hand is exactly the job the SDK's bundled registry does — see example 02.

Built by nirholas · three.ws