Register new `hyperliquid-official` publisher for official Hyperliquid /info endpoints

[taariq]

Summary

We need a new Seren publisher, hyperliquid-official, backed by the official Hyperliquid public API rather than QuickNode.

This is for a public, market-level Hyperliquid signal service that runs hourly scans and persists funding/liquidity signals. It is not a wallet-specific or user-decisioning service.

Why this is needed

The current seren-hyperliquid publisher is not sufficient for this use case.

Observed behavior from live checks:

• seren-hyperliquid is currently backed by QuickNode.
• working calls go through POST /info, not GET /info.
• required market-data methods such as l2Book are not available through the current publisher path.

QuickNode's own per-method docs also say several required Hyperliquid Info methods are not supported there.

Required publisher

Please register a new publisher with:

• slug: hyperliquid-official
• upstream: official Hyperliquid public API
• surface: POST /info

Required methods for v1

At minimum, the new publisher needs to support these type payloads through POST /info:

• meta
• allMids
• l2Book
• fundingHistory
• predictedFundings
• metaAndAssetCtxs

These are the methods needed for the planned public service:

• market metadata / universe context
• mid prices
• order book / liquidity checks
• historical funding
• predicted funding
• asset context for signal generation

Explicitly not required for this request

This ticket is not blocked on user-scoped methods like:

• userFunding
• account state / wallet state methods

Those can be handled separately if we decide to build user-specific services later.

Acceptance criteria

• A new publisher hyperliquid-official exists in Seren.
• The publisher exposes POST /info and accepts Hyperliquid Info request bodies directly.
• Each required type payload above is verified end-to-end through the publisher.
• Publisher docs/examples show the request format for these methods.
• The publisher is suitable for hourly public market-data scans and persistence jobs.

References

Official Hyperliquid docs:

• Info endpoint: https://hyperliquid.gitbook.io/hyperliquid-docs/for-developers/api/info-endpoint
• Perpetuals methods: https://hyperliquid.gitbook.io/hyperliquid-docs/for-developers/api/info-endpoint/perpetuals

QuickNode docs showing unsupported methods:

• allMids: https://www.quicknode.com/docs/hyperliquid/info-endpoints/allMids
• l2Book: https://www.quicknode.com/docs/hyperliquid/info-endpoints/l2Book
• fundingHistory: https://www.quicknode.com/docs/hyperliquid/info-endpoints/fundingHistory
• predictedFundings: https://www.quicknode.com/docs/hyperliquid/info-endpoints/predictedFundings
• metaAndAssetCtxs: https://www.quicknode.com/docs/hyperliquid/info-endpoints/metaAndAssetCtxs