bump version.

when updating subscription or adding new relays, subsequent events that are received have the relay as undefined. by updating cb property for the subControllers entries to be an arrow function (when calling sub.sub or sub.addRelay), subsequent events now return the relay url appropriately

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nostr-tools",
-  "version": "0.23.1",
+  "version": "0.23.4",
   "description": "Tools for making a Nostr client.",
   "repository": {
     "type": "git",

pool.js

@@ -26,16 +26,15 @@ export function relayPool() {
 
   const activeSubscriptions = {}
 
-  const sub = (
+  const sub = ({cb, filter, beforeSend}, id) => {
-    {cb, filter, beforeSend},
+    if (!id) id = Math.random().toString().slice(2)
-    id = Math.random().toString().slice(2)
+
-  ) => {
     const subControllers = Object.fromEntries(
       Object.values(relays)
         .filter(({policy}) => policy.read)
         .map(({relay}) => [
           relay.url,
-          relay.sub({filter, cb: event => cb(event, relay.url), beforeSend}, id)
+          relay.sub({cb: event => cb(event, relay.url), filter, beforeSend}, id)
         ])
     )
 
@@ -54,12 +53,15 @@ export function relayPool() {
     }) => {
       Object.entries(subControllers).map(([relayURL, sub]) => [
         relayURL,
-        sub.sub({cb, filter, beforeSend}, id)
+        sub.sub({cb: event => cb(event, relayURL), filter, beforeSend}, id)
       ])
       return activeSubscriptions[id]
     }
     const addRelay = relay => {
-      subControllers[relay.url] = relay.sub({cb, filter}, id)
+      subControllers[relay.url] = relay.sub(
+        {cb: event => cb(event, relay.url), filter, beforeSend},
+        id
+      )
       return activeSubscriptions[id]
     }
     const removeRelay = relayURL => {