How to Run a Robinhood Chain Node

Running a Robinhood Chain node means syncing an Arbitrum Nitro node against chain ID 4663. The fastest way to get one running is to restore from a weekly archive-node snapshot published by Titan Snapshots at https://snapshot.titandeployer.com — a Titan-operated resource on the same domain as this site — instead of syncing from genesis, which can take far longer.

What kind of node is a Robinhood Chain node?

Robinhood Chain is an Arbitrum Orbit chain built on Arbitrum's Nitro stack, running under chain ID 4663. That means the node software is Arbitrum Nitro (the same client family used by Arbitrum One and other Orbit chains), not a generic Ethereum client — the snapshot service itself runs against the offchainlabs/nitro-node image.

Syncing from genesis vs. restoring a snapshot

A node can sync two ways: replay every block from genesis, or restore a snapshot of an already-synced archive node's state and only sync the remaining recent blocks. Genesis sync is trustless but slow; restoring a snapshot is much faster and is the approach this guide covers. Either way, verify what you restore — see the checksum step below.

Step 1 — Download the latest snapshot

Titan Snapshots captures the full state of a production Robinhood Chain archive node every Wednesday at 03:00 UTC and compresses it with Zstandard — as of October 2026, roughly 1.3 TB of live data down to about 771 GB, and both figures grow with the chain. Each archive contains a single data/ directory with block headers, transaction history, and account/contract state. It excludes node secrets, keystores, and private keys. Only the latest snapshot is kept — each weekly build replaces the previous one — so download promptly if you need a specific week's state.

Step 2 — Verify the checksum

Every snapshot is published alongside a matching .sha256 checksum file. Download both, then verify the archive hasn't been corrupted or altered in transit with a standard checksum check before extracting it:

sha256sum -c robinhood-snapshot-<timestamp>.tar.zst.sha256

See the verify page at https://snapshot.titandeployer.com/verify for the exact, current instructions.

Step 3 — Extract the snapshot into your node's data directory

Each snapshot is a single .tar.zst archive. Extract it directly into the directory your node will use for chain data:

tar -I zstd -xf robinhood-snapshot-<timestamp>.tar.zst -C /path/to/node/data

That leaves a populated data/ directory your Nitro node can pick up on startup instead of syncing from block zero.

Step 4 — Start the Nitro node

With the data directory restored, point an Arbitrum Nitro node at it along with Robinhood Chain's own network configuration (parent-chain RPC endpoint, chain config, and sequencer/RPC settings). This guide intentionally doesn't hardcode specific launch flags or a parent-chain endpoint here — an incorrect chain config or parent-chain URL will simply fail to sync rather than silently produce wrong data, so follow Robinhood Chain's own current node-operator documentation for exact values instead of guessing.

Step 5 — Confirm your node is actually in sync

Once your node is running, cross-check its block height against Robinhood Chain's public RPC and its Etherscan explorer (robin.etherscan.io) — they should track closely once your node finishes catching up from the snapshot's timestamp to the present:

curl -s -X POST http://localhost:8547 \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

Compare the result against the same call against https://rpc.mainnet.chain.robinhood.com, or simply check the latest block shown on the block explorer.

Why you might still want your own long-lived archive

Titan Snapshots only retains the latest weekly snapshot. If you need a specific historical state older than that, you need to either already be running your own archive node or fetch that week's snapshot before the next build replaces it.

Risks and limitations

• A snapshot reflects chain state as of its generation timestamp, not the live tip — your node still has to sync the remaining blocks after restoring it.
• Always verify the published .sha256 checksum before trusting a downloaded archive, even from a Titan-operated service.
• An archive node needs meaningfully more disk than a non-archive node and grows over time — the live data directory is already around 1.3 TB, and keeping the ~771 GB download alongside it while you extract needs more than 2 TB free; plan storage accordingly.
• Snapshot filenames, retention windows, and exact verification commands can change — treat this guide as a map of the process, and defer to the live pages at snapshot.titandeployer.com for current specifics.
• This guide does not cover parent-chain RPC selection or Nitro launch flags, since guessing those wrong for a production chain is worse than not documenting them at all.

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