test: integration tests for Proof of Work enforcement (NIP-13)

[phoenix-server]

Summary

The relay supports limits.event.eventId.minLeadingZeroBits and limits.event.pubkey.minLeadingZeroBits settings to require Proof of Work on events and/or pubkeys. There are no integration tests verifying this enforcement.

What to test

• When minLeadingZeroBits is 0 (default), any event is accepted regardless of its PoW
• When minLeadingZeroBits > 0 on event ID, an event without sufficient PoW → rejected with pow: difficulty message
• When minLeadingZeroBits > 0 on event ID, an event meeting the PoW requirement → accepted
• When minLeadingZeroBits > 0 on pubkey, events from a pubkey not meeting PoW → rejected
• Events from a pubkey meeting the pubkey PoW requirement → accepted

Relevant code

• src/utils/proof-of-work.ts — getLeadingZeroBits
• resources/default-settings.yaml — limits.event.eventId.minLeadingZeroBits, limits.event.pubkey.minLeadingZeroBits
• src/handlers/event-message-handler.ts

Suggested location

test/integration/features/nip-13/nip-13.feature

[Mahmoud-s-Khedr]

@phoenix-server Assign this issue to me

[cameri]

thank you @Mahmoud-s-Khedr !