nip77: negentropy implementation and nip77 interface.

supersedes https://github.com/nbd-wtf/nostr-tools/pull/516

nip77.test.ts

@@ -1,88 +0,0 @@
-import { describe, it, expect } from 'bun:test'
-
-import { sendNegentropyMessage, openNegentropyWithMessage, closeNegentropy } from './nip77.ts'
-import type { Filter } from './filter.ts'
-import { AbstractRelay } from './abstract-relay.ts'
-import type { Event, VerifiedEvent } from './core.ts'
-
-// A minimal mock relay implementing send(). We don't need websocket behavior here.
-class MockRelay extends AbstractRelay {
-  public sent: string[] = []
-  constructor(url: string = 'wss://example.com') {
-    // pass a dummy verifyEvent function to satisfy constructor (always returns true)
-    const verifyEvent = (event: Event): event is VerifiedEvent => true
-    super(url, { verifyEvent })
-    // Pretend it's connected so send() doesn't throw.
-    // @ts-ignore accessing private
-    this.connectionPromise = Promise.resolve()
-  }
-  public override async send(message: string) {
-    this.sent.push(message)
-  }
-}
-
-function extractJSON(message: string) {
-  return JSON.parse(message)
-}
-
-describe('nip77 negentropy message helpers', () => {
-  it('sendNegentropyMessage should send NEG-MSG with generated subscription id and filters flattened', () => {
-    const relay = new MockRelay()
-    const filters: Filter[] = [{ kinds: [1], authors: ['abc'] }, { ids: ['deadbeef'] }]
-    sendNegentropyMessage(relay as any, 'hello', filters)
-
-    expect(relay.sent.length).toBe(1)
-    const arr = extractJSON(relay.sent[0])
-    expect(arr[0]).toBe('NEG-MSG')
-    expect(typeof arr[1]).toBe('string') // auto sub id
-    // message should include each filter object fields flattened after the sub id
-    // Request format built in nip77.ts: ["NEG-MSG","subId",<filters without outer []>,"msg"]
-    // So positions 2..n-2 are filter objects; last element is the msg string
-    expect(arr[arr.length - 1]).toBe('hello')
-    // Ensure at least one property from each filter is present
-    const serialized = relay.sent[0]
-    expect(serialized.includes('"kinds":[1]')).toBe(true)
-    expect(serialized.includes('"authors":["abc"]')).toBe(true)
-    expect(serialized.includes('"ids":["deadbeef"]')).toBe(true)
-  })
-
-  it('openNegentropyWithMessage should send NEG-OPEN', () => {
-    const relay = new MockRelay()
-    const filters: Filter[] = [{ kinds: [3] }]
-    openNegentropyWithMessage(relay as any, 'init', filters, 'sub123')
-
-    expect(relay.sent.length).toBe(1)
-    const arr = extractJSON(relay.sent[0])
-    expect(arr[0]).toBe('NEG-OPEN')
-    expect(arr[1]).toBe('sub123')
-    expect(arr[arr.length - 1]).toBe('init')
-  })
-
-  it('closeNegentropy should send NEG-CLOSE with given subscription id', () => {
-    const relay = new MockRelay()
-    closeNegentropy(relay as any, 'subXYZ')
-
-    expect(relay.sent.length).toBe(1)
-    const arr = extractJSON(relay.sent[0])
-    expect(arr).toEqual(['NEG-CLOSE', 'subXYZ'])
-  })
-
-  it('sendNegentropyMessage should honor provided subscriptionId', () => {
-    const relay = new MockRelay()
-    const filters: Filter[] = [{ kinds: [1] }]
-    sendNegentropyMessage(relay as any, 'custom', filters, 'customSub')
-    const arr = extractJSON(relay.sent[0])
-    expect(arr[1]).toBe('customSub')
-  })
-
-  it('should handle empty filters array (request still valid)', () => {
-    const relay = new MockRelay()
-    sendNegentropyMessage(relay as any, 'nofilters', [])
-    const arr = extractJSON(relay.sent[0])
-    expect(arr[0]).toBe('NEG-MSG')
-    expect(typeof arr[1]).toBe('string')
-    // With empty filters array we expect exactly 3 elements: type, subId, msg
-    expect(arr.length).toBe(3)
-    expect(arr[2]).toBe('nofilters')
-  })
-})