Summary

Related issue: #____

What changed?

• Split the monolithic NIP-01 helper into dedicated event, tag, and message components and rewired NIP01 to compose them.
• Applied the same separation to the NIP-57 helper with focused builders for zap requests, receipts, and tags.
• Refactored NostrSpringWebSocketClient to delegate relay lifecycle, event dispatch, REQ handling, and subscriptions to dedicated collaborators.
• Moved validation, serialization, and conversion responsibilities for GenericEvent into purpose-built support utilities.

BREAKING

None.

Review focus

• Confirm the new helper classes cover the previous event/tag/message creation scenarios for NIP-01 and NIP-57.
• Ensure the refactored WebSocket client preserves subscription error handling and request fan-out behaviour.

Checklist

• Scope ≤ 300 lines (or split/stack)
• Title is verb + object (e.g., “Refactor auth middleware to async”)
• Description links the issue and answers “why now?”
• BREAKING flagged if needed
• Tests/docs updated (if relevant)

Testing

• mvn -q verify (fails: xyz.tcheeric:nostr-java-bom:1.1.1 missing from Maven Central)

Network Access

• Blocked: https://repo.maven.apache.org/maven2/xyz/tcheeric/nostr-java-bom/1.1.1/

https://chatgpt.com/codex/tasks/task_b_68e337e2acfc83319e62250f0db94bc8