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How to serve Nuvex network counts from an indexed Postgres store with Nuvex Services

Run the indexer against a Postgres database, then query the read API for requests, nodes, and network counts.

Credentials. DATABASE_URL and the RPC URL go into .env.local, so keep that file out of version control and do not share the database connection string.

Who it is forA developer who needs a local read API that shows Nuvex network state from data the indexer wrote, not from live chain calls.

The problemThe API reads requests, nodes, and network counts from the indexer store. Without an indexed database, those endpoints have nothing to return.

The outcomeA running API where GET /health reports authority: none and the other read endpoints return rows the indexer decoded from program accounts.

What you need first

  • Git and a clone of NuvexNetwork/nuvex-services
  • pnpm and make, for `pnpm install` and `make check`
  • A Solana-compatible RPC URL (NUVEX_RPC_URL or NUVEX_SOLANA_RPC_URL)
  • At least one Nuvex program id (NUVEX_ORACLE_CORE_PROGRAM_ID, NUVEX_ORACLE_REGISTRY_PROGRAM_ID, or NUVEX_VERIFICATION_PROGRAM_ID)
  • A PostgreSQL DATABASE_URL, or a NUVEX_READ_MODEL_PATH for a JSON snapshot

Steps

  1. Run pnpm install in the repository root.
  2. Run cp env/.env.local.example .env.local and set NUVEX_RPC_URL, one program id, and DATABASE_URL in it.
  3. Apply the SQL files in indexer/prisma/migrations/ to the database before starting the API.
  4. Start the indexer with the start command described in the indexer section of the README (the exact command is not shown there, so check the indexer/ folder), then start the API.
  5. Open GET /health on the API and confirm the response includes authority: none.

Prompt for your agent

Work in the NuvexNetwork/nuvex-services repo. Using the .env.local values for <rpc-url> and <database-url>, apply the migrations in indexer/prisma/migrations/, start the indexer and API, then call GET /health. Report the response body and confirm it says authority: none, and state whether the program account counts returned by the API are non-empty.

Caveat. The indexer exits with code 2 unless an RPC URL, a program id, and either DATABASE_URL or NUVEX_READ_MODEL_PATH are all set, and the README does not give the start command.

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