Solana Address Book (Easy)

Build a REST API for managing Solana addresses. Detect whether each address is a wallet or a PDA, and verify ownership where applicable.

Requirements

• Persist contacts in a database or in-memory store (your choice for the bounty).
• Validate Solana address format before accepting a contact.

Contacts CRUD

POST /api/contacts — Add a contact

Body: { "name": string, "address": string }

Response 201: { "id": number, "name": string, "address": string, "type": "wallet" | "pda", "createdAt": string }

GET /api/contacts — List contacts

Query param: ?type=wallet or ?type=pda to filter by detected type.

GET /api/contacts/:id — Fetch one contact

PATCH /api/contacts/:id — Update name or address (re-validate on address change)

DELETE /api/contacts/:id — Remove a contact

Edge cases

• Reject invalid base58 / wrong length addresses with 400.
• If the same address is submitted twice, return 409 or upsert — document your choice in the README.