feat(nip77): advertise NIP-77 in NIP-11 and expose its settings in the admin console (#830)

* feat(nip77): advertise NIP-77 in NIP-11 supported_nips when active

Signed-off-by: Priyanshubhartistm <bhartipriyanshustm@gmail.com>

* feat(nip77): expose nip77 settings in the admin console

Signed-off-by: Priyanshubhartistm <bhartipriyanshustm@gmail.com>

---------

Signed-off-by: Priyanshubhartistm <bhartipriyanshustm@gmail.com>
Co-authored-by: Ricardo Cabral <me@ricardocabral.io>

Author: Priyanshubhartistm

.changeset/nip77-nip11-advertisement.md

@@ -0,0 +1,5 @@
+---
+"nostream": minor
+---
+
+feat(nip77): advertise NIP-77 in NIP-11 supported_nips while it is active and expose its settings in the admin console

CONFIGURATION.md

@@ -232,7 +232,7 @@ The settings below are listed in alphabetical order by name. Please keep this ta
 | nip66.timeouts.nip11Ms                      | NIP-11 fetch timeout in milliseconds. Defaults to 10000. |
 | nip66.timeouts.tlsMs                        | TLS probe timeout in milliseconds. Defaults to 10000. |
 | nip66.timeouts.wsRttMs                      | WebSocket open RTT probe timeout in milliseconds. Defaults to 10000. |
-| nip77.enabled                               | Enable NIP-77 (Negentropy) set-reconciliation sync, so clients and other relays can find which events differ without downloading them all. Defaults to false. Only answers when `eventStore.backend` is `postgres`; other backends bring their own negentropy implementation. When `nip42.restrictedReads` is enabled, reconciliation would list the ids of restricted events, so a `NEG-OPEN` filter that could match one (it names a restricted kind or no kinds at all) is only accepted when scoped by `authors` or `#p` to pubkeys the client has authenticated as, and is re-checked on every `NEG-MSG`; otherwise the session is closed with `NEG-ERR auth-required:`. Each open session holds the ids of every event matching its filter in memory, so size the limits below for your hardware. |
+| nip77.enabled                               | Enable NIP-77 (Negentropy) set-reconciliation sync, so clients and other relays can find which events differ without downloading them all. Defaults to false. Only answers when `eventStore.backend` is `postgres`; other backends bring their own negentropy implementation. While active, the relay lists `77` in the NIP-11 `supported_nips`; it is left out when this is off or another backend is used. All `nip77.*` settings can be edited in the admin console and the CLI settings menu. When `nip42.restrictedReads` is enabled, reconciliation would list the ids of restricted events, so a `NEG-OPEN` filter that could match one (it names a restricted kind or no kinds at all) is only accepted when scoped by `authors` or `#p` to pubkeys the client has authenticated as, and is re-checked on every `NEG-MSG`; otherwise the session is closed with `NEG-ERR auth-required:`. Each open session holds the ids of every event matching its filter in memory, so size the limits below for your hardware. |
 | nip77.maxEventsPerSession                   | Most events one session may cover. A `NEG-OPEN` whose filter matches more is rejected with `NEG-ERR blocked:` (clients should split the sync into `since`/`until` windows). The filter's `limit` is ignored, since reconciliation needs the whole set. Defaults to 100000. |
 | nip77.maxSessionsPerConnection              | Concurrent negentropy sessions one websocket connection may hold; opening an id that is already open replaces it. Further `NEG-OPEN`s are rejected with `NEG-ERR blocked:`. Defaults to 3. |
 | nip77.sessionIdleTimeoutMs                  | A session that receives no `NEG-MSG` for this many milliseconds is closed with `NEG-ERR closed:`. Defaults to 60000. |

package.json

@@ -28,7 +28,8 @@
     44,
     45,
     50,
-    65
+    65,
+    77
   ],
   "supportedNipExtensions": [],
   "supportedMips": [

src/handlers/request-handlers/root-request-handler.ts

@@ -7,6 +7,7 @@ import { DEFAULT_FILTER_LIMIT } from '../../constants/base'
 import { fromBech32 } from '../../utils/transform'
 import { getTemplate } from '../../utils/template-cache'
 import { getPublicPathPrefix, joinPathPrefix } from '../../utils/http'
+import { isNip77Active } from '../../utils/nip77'
 import { resolveRelaySelfPubkey } from '../../utils/nip43'
 import packageJson from '../../../package.json'
 
@@ -88,10 +89,11 @@ export const rootRequestHandler = (request: Request, response: Response, next: N
       ...(self !== undefined ? { self } : {}),
       contact,
       // NIP-43: clients MUST only send join requests to relays advertising 43,
-      // so only advertise it when the feature is actually enabled
-      supported_nips: settings.nip43?.enabled === true
-        ? packageJson.supportedNips
-        : packageJson.supportedNips.filter((nip: number) => nip !== 43),
+      // so only advertise it when the feature is actually enabled. Likewise 77
+      // only while this relay answers NEG-OPEN itself (enabled, PostgreSQL backend).
+      supported_nips: packageJson.supportedNips.filter(
+        (nip: number) => (nip !== 43 || settings.nip43?.enabled === true) && (nip !== 77 || isNip77Active(settings)),
+      ),
       supported_nip_extensions: packageJson.supportedNipExtensions,
       supported_mips: packageJson.supportedMips,
       software: packageJson.repository.url,

src/utils/settings-guided-schema.ts

@@ -35,6 +35,24 @@ export const requireSafeNonNegativeIntegerSettingValue = (value: string): string
   return result.success ? undefined : result.error.issues[0].message
 }
 
+const positiveSafeIntegerSettingValueSchema = z
+  .string()
+  .trim()
+  .regex(/^\d+$/, 'Value must be a positive integer')
+  .transform(Number)
+  .pipe(
+    z
+      .number()
+      .int()
+      .min(1, 'Value must be a positive integer')
+      .max(Number.MAX_SAFE_INTEGER, 'Value must be a safe integer'),
+  )
+
+export const requireSafePositiveIntegerSettingValue = (value: string): string | undefined => {
+  const result = positiveSafeIntegerSettingValueSchema.safeParse(value)
+  return result.success ? undefined : result.error.issues[0].message
+}
+
 export const guidedSettingCategories: GuidedSettingCategory[] = [
   {
     value: 'relay-info',
@@ -254,6 +272,25 @@ export const guidedSettingCategories: GuidedSettingCategory[] = [
         path: 'nip56.hideActionableReports',
         type: 'boolean',
       },
+      { label: 'Enable NIP-77 negentropy sync (PostgreSQL backend only)', path: 'nip77.enabled', type: 'boolean' },
+      {
+        label: 'NIP-77 max events per session',
+        path: 'nip77.maxEventsPerSession',
+        type: 'number',
+        validate: requireSafePositiveIntegerSettingValue,
+      },
+      {
+        label: 'NIP-77 max sessions per connection',
+        path: 'nip77.maxSessionsPerConnection',
+        type: 'number',
+        validate: requireSafePositiveIntegerSettingValue,
+      },
+      {
+        label: 'NIP-77 session idle timeout (ms)',
+        path: 'nip77.sessionIdleTimeoutMs',
+        type: 'number',
+        validate: requireSafePositiveIntegerSettingValue,
+      },
     ],
   },
   {

test/integration/features/nip-11/nip-11.feature.ts

@@ -67,9 +67,9 @@ Then('the relay information document contains the required fields', function(thi
 
 Then('the supported_nips field matches the NIPs declared in package.json', function(this: World<Record<string, any>>) {
   const doc = this.parameters.httpResponse.data
-  // NIP-43 is only advertised when enabled in settings; the integration
-  // relay runs with NIP-43 disabled, so it is filtered from the document.
-  expect(doc.supported_nips).to.deep.equal(packageJson.supportedNips.filter((nip: number) => nip !== 43))
+  // NIP-43 and NIP-77 are only advertised when enabled in settings; the integration
+  // relay runs with both disabled, so they are filtered from the document.
+  expect(doc.supported_nips).to.deep.equal(packageJson.supportedNips.filter((nip: number) => nip !== 43 && nip !== 77))
 })
 
 Then('the response body is not a relay information document', function(this: World<Record<string, any>>) {

test/unit/handlers/request-handlers/root-request-handler.spec.ts

@@ -12,6 +12,7 @@ import {
   rootRequestHandler,
 } from '../../../../src/handlers/request-handlers/root-request-handler'
 import { DEFAULT_FILTER_LIMIT } from '../../../../src/constants/base'
+import * as eventStoreUtils from '../../../../src/utils/event-store'
 import * as eventUtils from '../../../../src/utils/event'
 import { toBech32 } from '../../../../src/utils/transform'
 
@@ -265,6 +266,47 @@ describe('rootRequestHandler', () => {
       expect(doc.limitation.default_limit).to.equal(DEFAULT_FILTER_LIMIT)
     })
 
+    describe('supported_nips and NIP-77', () => {
+      const advertised = (settings: any) => {
+        createSettingsStub.returns(settings)
+        rootRequestHandler(req, res, next)
+        return res.send.lastCall.args[0].supported_nips
+      }
+
+      it('advertises 77 when NIP-77 is enabled on the PostgreSQL backend', () => {
+        expect(advertised({ ...baseSettings, nip77: { enabled: true } })).to.include(77)
+        expect(
+          advertised({ ...baseSettings, nip77: { enabled: true }, eventStore: { backend: 'postgres' } }),
+        ).to.include(77)
+      })
+
+      it('does not advertise 77 when NIP-77 is disabled or unset', () => {
+        expect(advertised(baseSettings)).to.not.include(77)
+        expect(advertised({ ...baseSettings, nip77: { enabled: false } })).to.not.include(77)
+      })
+
+      it('does not advertise 77 when another event store backend is used', () => {
+        // postgres is the only backend the settings accept today; simulate the strfry backend
+        // that will bring its own negentropy implementation.
+        const backendStub = sinon.stub(eventStoreUtils, 'getEventStoreBackend').returns('strfry' as any)
+        try {
+          expect(advertised({ ...baseSettings, nip77: { enabled: true } })).to.not.include(77)
+        } finally {
+          backendStub.restore()
+        }
+      })
+
+      it('still gates 43 on NIP-43 independently of 77', () => {
+        const both = advertised({ ...baseSettings, nip43: { enabled: true }, nip77: { enabled: true } })
+        expect(both).to.include(43)
+        expect(both).to.include(77)
+
+        const onlyNip77 = advertised({ ...baseSettings, nip77: { enabled: true } })
+        expect(onlyNip77).to.not.include(43)
+        expect(onlyNip77).to.include(77)
+      })
+    })
+
     it('sets limitation.search_supported to false when NIP-50 is disabled', () => {
       rootRequestHandler(req, res, next)
 

test/unit/utils/settings-config.spec.ts

@@ -22,6 +22,7 @@ import {
   guidedSettingCategories,
   requireNonEmptySettingValue,
   requireSafeNonNegativeIntegerSettingValue,
+  requireSafePositiveIntegerSettingValue,
 } from '../../../src/utils/settings-guided-schema'
 
 describe('settings-config', () => {
@@ -446,6 +447,26 @@ describe('settings-guided-schema', () => {
     expect(requireNonEmptySettingValue(' ')).to.equal('Value is required')
   })
 
+  it('validates guided positive integer fields', () => {
+    expect(requireSafePositiveIntegerSettingValue('bad')).to.equal('Value must be a positive integer')
+    expect(requireSafePositiveIntegerSettingValue('-1')).to.equal('Value must be a positive integer')
+    expect(requireSafePositiveIntegerSettingValue('0')).to.equal('Value must be a positive integer')
+    expect(requireSafePositiveIntegerSettingValue('9007199254740993')).to.equal('Value must be a safe integer')
+    expect(requireSafePositiveIntegerSettingValue(' 60000 ')).to.equal(undefined)
+  })
+
+  it('exposes the nip77 settings with positive integer validation', () => {
+    const category = 'nip-features'
+
+    expect(getGuidedSettingField(category, 'nip77.enabled')?.type).to.equal('boolean')
+    for (const key of ['maxEventsPerSession', 'maxSessionsPerConnection', 'sessionIdleTimeoutMs']) {
+      const field = getGuidedSettingField(category, `nip77.${key}`)
+      expect(field?.type, key).to.equal('number')
+      expect(field?.validate?.('0'), key).to.equal('Value must be a positive integer')
+      expect(field?.validate?.('3'), key).to.equal(undefined)
+    }
+  })
+
   it('does not create settings.yaml when ensuring config dir exists', () => {
     const originalConfigDir = process.env.NOSTR_CONFIG_DIR
     const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'nostream-settings-config-'))