use per-subscription alreadyHaveEvent handler instead of per-relay.

now pools are much smarter.

pool.test.js

@@ -12,18 +12,19 @@ const {
 let p = pool()
 
 let relays = [
-  p.ensureRelay('wss://nostr-dev.wellorder.net/'),
-  p.ensureRelay('wss://relay.nostr.bg/'),
-  p.ensureRelay('wss://nostr.fmt.wiz.biz/'),
-  p.ensureRelay('wss://relay.nostr.band/'),
-  p.ensureRelay('wss://nostr.zebedee.cloud/')
+  'wss://nostr-dev.wellorder.net/',
+  'wss://relay.nostr.bg/',
+  'wss://nostr.fmt.wiz.biz/',
+  'wss://relay.nostr.band/',
+  'wss://nostr.zebedee.cloud/'
 ]
 
 beforeAll(async () => {
   Promise.all(
     relays.map(relay => {
       try {
-        return relay.connect()
+        let r = p.ensureRelay(relay)
+        return r.connect()
       } catch (err) {
         /***/
       }
@@ -34,7 +35,8 @@ beforeAll(async () => {
 afterAll(async () => {
   relays.forEach(relay => {
     try {
-      relay.close()
+      let r = p.ensureRelay(relay)
+      r.close()
     } catch (err) {
       /***/
     }
@@ -45,13 +47,11 @@ test('removing duplicates when querying', async () => {
   let priv = generatePrivateKey()
   let pub = getPublicKey(priv)
 
-  let subs = relays.map(relay =>
-    relay.sub([
-      {
-        authors: [pub]
-      }
-    ])
-  )
+  let subs = p.sub(relays, [
+    {
+      authors: [pub]
+    }
+  ])
 
   let received = []
 
@@ -74,11 +74,46 @@ test('removing duplicates when querying', async () => {
   event.id = getEventHash(event)
   event.sig = signEvent(event, priv)
 
-  relays.forEach(relay => {
-    relay.publish(event)
-  })
+  p.publish(relays, event)
 
   await new Promise(resolve => setTimeout(resolve, 1500))
 
-  return expect(received).toHaveLength(1)
+  expect(received).toHaveLength(1)
+})
+
+test('removing duplicates correctly when double querying', async () => {
+  let priv = generatePrivateKey()
+  let pub = getPublicKey(priv)
+
+  let subs1 = p.sub(relays, [ { authors: [pub] } ])
+  let subs2 = p.sub(relays, [ { authors: [pub] } ])
+
+  let received = []
+
+  subs1.forEach(sub =>
+    sub.on('event', event => {
+      received.push(event)
+    })
+  )
+  subs2.forEach(sub =>
+    sub.on('event', event => {
+      received.push(event)
+    })
+  )
+
+  let event = {
+    pubkey: pub,
+    created_at: Math.round(Date.now() / 1000),
+    content: 'test2',
+    kind: 22346,
+    tags: []
+  }
+  event.id = getEventHash(event)
+  event.sig = signEvent(event, priv)
+
+  p.publish(relays, event)
+
+  await new Promise(resolve => setTimeout(resolve, 1500))
+
+  expect(received).toHaveLength(2)
 })

pool.ts

@@ -2,7 +2,7 @@ import {Relay, relayInit} from './relay'
 import {normalizeURL} from './utils'
 import {Filter} from './filter'
 import {Event} from './event'
-import {SubscriptionOptions, Sub} from './relay'
+import {SubscriptionOptions, Sub, Pub} from './relay'
 
 export function pool(defaultRelays: string[] = []) {
   return new SimplePool(defaultRelays)
@@ -10,7 +10,6 @@ export function pool(defaultRelays: string[] = []) {
 
 class SimplePool {
   private _conn: {[url: string]: Relay}
-  private _knownIds: Set<string> = new Set()
 
   constructor(defaultRelays: string[]) {
     this._conn = {}
@@ -22,17 +21,52 @@ class SimplePool {
     const existing = this._conn[nm]
     if (existing) return existing
 
-    const hasEventId = (id: string): boolean => this._knownIds.has(id)
-    const relay = relayInit(nm, hasEventId)
+    const relay = relayInit(nm)
     this._conn[nm] = relay
 
-    let sub = relay.sub
-    relay.sub = (filters: Filter[], opts?: SubscriptionOptions): Sub => {
-      let s = sub(filters, opts)
-      s.on('event', (event: Event) => this._knownIds.add(event.id as string))
-      return s
-    }
-
     return relay
   }
+
+  sub(relays: string[], filters: Filter[], opts?: SubscriptionOptions): Sub[] {
+    let _knownIds: Set<string> = new Set()
+    let modifiedOpts = opts || {}
+    modifiedOpts.alreadyHaveEvent = id => _knownIds.has(id)
+
+    return relays.map(relay => {
+      let r = this._conn[relay]
+      if (!r) return badSub()
+      let s = r.sub(filters, modifiedOpts)
+      s.on('event', (event: Event) => _knownIds.add(event.id as string))
+      return s
+    })
+  }
+
+  publish(relays: string[], event: Event): Pub[] {
+    return relays.map(relay => {
+      let r = this._conn[relay]
+      if (!r) return badPub(relay)
+      let s = r.publish(event)
+      return s
+    })
+  }
+}
+
+function badSub(): Sub {
+  return {
+    on() {},
+    off() {},
+    sub(): Sub {
+      return badSub()
+    },
+    unsub() {}
+  }
+}
+
+function badPub(relay: string): Pub {
+  return {
+    on(typ, cb) {
+      if (typ === 'failed') cb(`relay ${relay} not connected`)
+    },
+    off() {}
+  }
 }

relay.ts

@@ -2,7 +2,7 @@
 
 import {Event, verifySignature, validateEvent} from './event'
 import {Filter, matchFilters} from './filter'
-import {getHex64} from './fakejson'
+import {getHex64, getSubscriptionId} from './fakejson'
 
 type RelayEvent = 'connect' | 'disconnect' | 'error' | 'notice'
 
@@ -29,13 +29,11 @@ export type Sub = {
 
 export type SubscriptionOptions = {
   skipVerification?: boolean
+  alreadyHaveEvent?: null | ((id: string) => boolean)
   id?: string
 }
 
-export function relayInit(
-  url: string,
-  alreadyHaveEvent: (id: string) => boolean = () => false
-): Relay {
+export function relayInit(url: string): Relay {
   var ws: WebSocket
   var resolveClose: () => void
   var setOpen: (value: PromiseLike<void> | void) => void
@@ -104,8 +102,14 @@ export function relayInit(
         }
 
         var json = incomingMessageQueue.shift()
-        if (!json || alreadyHaveEvent(getHex64(json, 'id'))) {
-          return
+        if (!json) return
+
+        let subid = getSubscriptionId(json)
+        if (subid) {
+          let {alreadyHaveEvent} = openSubs[subid]
+          if (alreadyHaveEvent && alreadyHaveEvent(getHex64(json, 'id'))) {
+            return
+          }
         }
 
         try {
@@ -173,6 +177,7 @@ export function relayInit(
     filters: Filter[],
     {
       skipVerification = false,
+      alreadyHaveEvent = null,
       id = Math.random().toString().slice(2)
     }: SubscriptionOptions = {}
   ): Sub => {
@@ -181,7 +186,8 @@ export function relayInit(
     openSubs[subid] = {
       id: subid,
       filters,
-      skipVerification
+      skipVerification,
+      alreadyHaveEvent
     }
     trySend(['REQ', subid, ...filters])
 
@@ -189,6 +195,7 @@ export function relayInit(
       sub: (newFilters, newOpts = {}) =>
         sub(newFilters || filters, {
           skipVerification: newOpts.skipVerification || skipVerification,
+          alreadyHaveEvent: newOpts.alreadyHaveEvent || alreadyHaveEvent,
           id: subid
         }),
       unsub: () => {