From 01d5f45db67e03e748ace5a94f43781ac3b4c42d Mon Sep 17 00:00:00 2001
From: Felicio Mununga <felicio@users.noreply.github.com>
Date: Thu, 30 Jun 2022 15:12:26 +0200
Subject: [PATCH] Reestablish peer connection on silent stream destruction
 (#288)

---
 packages/status-js/src/client/client.ts | 37 +++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/packages/status-js/src/client/client.ts b/packages/status-js/src/client/client.ts
index c586b74..4fac086 100644
--- a/packages/status-js/src/client/client.ts
+++ b/packages/status-js/src/client/client.ts
@@ -18,14 +18,32 @@ export interface ClientOptions {
 class Client {
   public waku: Waku
   public readonly wakuMessages: Set<string>
+  /**
+   * Tracks open connections which had their streams silently destroyed
+   * and closes them so new connections can be automatically created.
+   *
+   * For example, in case of a websocket in browser which did not
+   * have its close event emitted.
+   *
+   * Note: Detection of the stream removal depends on active (by user)
+   * or pasive (with `Waku.relayKeepAlive`) message sending.
+   *
+   * Note: This is only a workaround (@see https://github.com/libp2p/js-libp2p/issues/939).
+   */
+  #wakuDisconnectionTimer: ReturnType<typeof setInterval>
 
   public account?: Account
   public community: Community
 
-  constructor(waku: Waku, options: ClientOptions) {
+  constructor(
+    waku: Waku,
+    wakuDisconnectionTimer: ReturnType<typeof setInterval>,
+    options: ClientOptions
+  ) {
     // Waku
     this.waku = waku
     this.wakuMessages = new Set()
+    this.#wakuDisconnectionTimer = wakuDisconnectionTimer
 
     // Community
     this.community = new Community(this, options.publicKey)
@@ -41,12 +59,26 @@ class Client {
           // '/dns4/node-01.do-ams3.wakuv2.test.statusim.net/tcp/8000/wss/p2p/16Uiu2HAmPLe7Mzm8TsYUubgCAW1aJoeFScxrLj8ppHFivPo97bUZ',
         ],
       },
+      relayKeepAlive: 15,
       libp2p: { config: { pubsub: { enabled: true, emitSelf: true } } },
     })
     await waku.waitForRemotePeer()
+    const wakuDisconnectionTimer = setInterval(async () => {
+      const connectionsToClose: Promise<void>[] = []
+
+      for (const connections of waku.libp2p.connectionManager.connections.values()) {
+        for (const connection of connections) {
+          if (!connection.streams.length) {
+            connectionsToClose.push(connection.close())
+          }
+        }
+      }
+
+      await Promise.allSettled(connectionsToClose)
+    }, 10 * 1000)
 
     // Client
-    const client = new Client(waku, options)
+    const client = new Client(waku, wakuDisconnectionTimer, options)
 
     // Community
     await client.community.start()
@@ -55,6 +87,7 @@ class Client {
   }
 
   public async stop() {
+    clearInterval(this.#wakuDisconnectionTimer)
     await this.waku.stop()
   }