diff --git a/src/App.ts b/src/App.ts
index a127b4b..4904313 100644
--- a/src/App.ts
+++ b/src/App.ts
@@ -46,6 +46,14 @@ interface StoragePost {
   data: Post;
 }
 
+
+
+interface SyncItem {
+  peerID: string;
+  postIDs: string[];
+
+}
+
 export class App {
   username: string = '';
   peername: string = '';
@@ -67,50 +75,59 @@ export class App {
   peerManager: PeerManager | null = null;
   sync: Sync = new Sync();
   renderTimer: number = 0;
-  postSyncQueue: any[] = [];
-  postSyncPromise: any = null;
+  syncQueues: Map<string, SyncItem[]> = new Map();
+  syncing: Set<string> = new Set();
 
-  async syncPostsInQueue() {
+  async processSyncQueue(userID: string) {
 
-    if (this.postSyncPromise) {
+    if (this.syncing.has(userID)) {
       return;
     }
 
-    while (this.postSyncQueue.length !== 0) {
+    let syncQueue = this.syncQueues.get(userID) as SyncItem[];
 
-      let queueItem = this.postSyncQueue.pop();
+    while (syncQueue.length !== 0) {
+      this.syncing.add(userID);
+      let syncItem = syncQueue.pop();
 
-      let userID = queueItem.userID;
-      let peerID = queueItem.peerID;
-      let postIDs = queueItem.postIDs;
+      if (!syncItem) {
+        throw new Error();
+      }
 
-      new Promise(async (resolve, reject) => {
-        let neededPostIDs = await this.sync.checkPostIds(userID, peerID, postIDs);
+      let peerID = syncItem?.peerID;
+      let postIDs = syncItem?.postIDs;
+      let neededPostIDs = await this.sync.checkPostIds(userID, peerID, postIDs);
 
-        if (neededPostIDs.length > 0) {
-          console.log.apply(null, log(`[app] Need (${neededPostIDs.length}) posts for user ${logID(userID)} from peer ${logID(peerID)}`));
-          let neededPosts = await this.peerManager?.rpc.getPostsForUser(peerID, this.peerID, userID, neededPostIDs);
-          // console.log(neededPosts);
-
-        }
-        else {
-          console.log.apply(null, log(`[app] Don't need any posts for user ${logID(userID)} from peer ${logID(sendingPeerID)}`));
-        }
-
-      })
+      if (neededPostIDs.length > 0) {
+        console.log.apply(null, log(`[app] Need (${neededPostIDs.length}) posts for user ${logID(userID)} from peer ${logID(peerID)}`));
+        let neededPosts = await this.peerManager?.rpc.getPostsForUser(peerID, this.peerID, userID, neededPostIDs);
+        // console.log(neededPosts);
 
+      }
+      else {
+        console.log.apply(null, log(`[app] Don't need any posts for user ${logID(userID)} from peer ${logID(peerID)}`));
+      }
     }
 
-
-
-
-
+    this.syncing.delete(userID);
   }
 
   addPostIDsToSyncQueue(userID: string, peerID: string, postIDs: string[]) {
-    this.postSyncQueue.push({ userID: userID, peerID: peerID, postIDs: postIDs });
+
+    let syncQueue = this.syncQueues.get(userID);
+
+    if (!syncQueue) {
+      let newArray: SyncItem[] = [];
+      this.syncQueues.set(userID, newArray);
+      syncQueue = newArray;
+    }
+
+    syncQueue.push({ peerID: peerID, postIDs: postIDs });
+
+    this.processSyncQueue(userID);
   }
 
+
   // To avoid reuesting the same posts from multiple peers:
   // 1. Add incoming IDs to queue
   // 2. Call a function that tests IDs and then gets posts.
@@ -128,18 +145,14 @@ export class App {
       if (!(this.sync.shouldSyncUserID(userID) || (this.router.route === App.Route.USER && userID === this.router.userID))) {
         console.log.apply(null, log(`[app] announceUser_rpc_response skipping user[${logID(userID)}] from[${logID(sendingPeerID)}]`));
 
-        continue; 
+        continue;
       }
 
       console.log.apply(null, log(`[app] calling getPostIDsForUser for user [${logID(userID)}] on peer [${logID(sendingPeerID)}]`));
 
       let postIDs = await this.peerManager?.rpc.getPostIDsForUser(sendingPeerID, userID);
       console.log.apply(null, log(`[app] Got (${postIDs.length}) post IDs for user [${logID(userID)}] from peer [${logID(sendingPeerID)}]`));
-
-
       this.addPostIDsToSyncQueue(userID, sendingPeerID, postIDs);
-
-
     }
   }
 
@@ -167,9 +180,7 @@ export class App {
     });
 
     this.peerManager.addEventListener(PeerEventTypes.PEER_DISCONNECTED, async (event: any) => {
-      let peerID = event.peerID;
       console.log.apply(null, log(`[app]: peer disconnected:${event.peerID}`));
-      this.sync.deleteUserPeer(peerID);
     });
 
 
@@ -206,15 +217,17 @@ export class App {
       for (let post of posts) {
         console.log.apply(null, log(`[app] sendPostForUser sending post [${logID(post.post_id)}] to [${logID(requestingPeerID)}]`, userID, post.author, post.text));
 
-        this.peerManager?.rpc.sendPostForUser(requestingPeerID, userID, post);
+        await this.peerManager?.rpc.sendPostForUser(requestingPeerID, this.peerID, userID, post);
       }
+
+      return true;
       // return posts;
 
       // return postIDs;
     });
 
-    this.peerManager.registerRPC('sendPostForUser', async (userID: string, post: Post) => {
-      console.log.apply(null, log(`[app] sendPostForUser got post ${logID(userID)} author ${post.author} text ${post.text}`));
+    this.peerManager.registerRPC('sendPostForUser', async (sendingPeerID: string, userID: string, post: Post) => {
+      console.log.apply(null, log(`[app] sendPostForUser got post[${logID(post.post_id)}] from peer[${logID(sendingPeerID)}] for user[${logID(userID)}] author[${post.author}] text[${post.text}]`));
       // if (post.text === "image...") {
       //   debugger;
       // }
@@ -225,7 +238,9 @@ export class App {
         clearTimeout(this.renderTimer);
       }
 
-      this.renderTimer = setTimeout(() => { this.render() }, 200);
+      this.renderTimer = setTimeout(() => { this.render() }, 1000);
+
+      return true;
       // }
     });
 
@@ -243,7 +258,7 @@ export class App {
     // for (let userID of usersToSync) {
     //   console.log(userID);
     //   // this.peerManager.rpc.getPeersForUser(userID);
-    // }
+    // } 
 
 
     // for (let userID in this.sync.usersToSync()) {
@@ -794,7 +809,7 @@ export class App {
     return document.getElementById(elementName) as HTMLDivElement;
   }
 
-  initButtons(userID: string, posts: StoragePost[], registration: ServiceWorkerRegistration | undefined) {
+  initButtons(userID: string, posts: StoragePost[]) {
     // let font1Button = document.getElementById("button_font1") as HTMLButtonElement;
     // let font2Button = document.getElementById("button_font2") as HTMLButtonElement;
     // let importTweetsButton = document.getElementById("import_tweets") as HTMLButtonElement;
@@ -1067,13 +1082,7 @@ export class App {
       this.limitPosts = parseInt(limitPostsParam);
     }
 
-    this.peerID = this.getPeerID();
-    this.peername = this.getPeername();
-    this.userID = this.getUserID();
-    this.username = this.getUsername();
-
-    this.sync.setUserID(this.userID)
-    this.sync.setArchive(this.isArchivePeer);
+ 
 
     this.getRoute();
     if (this.router.route === App.Route.CONNECT) {
@@ -1082,6 +1091,15 @@ export class App {
       localStorage.removeItem("dandelion_username");
     }
 
+
+    this.peerID = this.getPeerID();
+    this.peername = this.getPeername();
+    this.userID = this.getUserID();
+    this.username = this.getUsername();
+
+    this.sync.setUserID(this.userID)
+    this.sync.setArchive(this.isArchivePeer);
+
     this.connect();
 
     await this.initDB();
@@ -1124,17 +1142,19 @@ export class App {
     //   let storageUsed = (await navigator?.storage?.estimate())?.usage/1024/1024
     // }
 
-    // if (urlParams.get("sw") === "true") {
     let registration;
-    registration = await this.registerServiceWorker();
-    // }
+    let shouldRegisterServiceWorker = !(this.isBootstrapPeer || this.isArchivePeer || this.isHeadless);
+
+    if (shouldRegisterServiceWorker) {
+      registration = await this.registerServiceWorker();
+    }
 
     document.getElementById('username')!.innerText = `${this.username}`;
     document.getElementById('peername')!.innerText = `peername:${this.peername}`;
     document.getElementById('user_id')!.innerText = `user_id:${this.userID}`;
     document.getElementById('peer_id')!.innerText = `peer_id:${this.peerID}`;
 
-    this.initButtons(this.userID, this.posts, registration);
+    this.initButtons(this.userID, this.posts);
 
 
 
diff --git a/src/PeerManager.ts b/src/PeerManager.ts
index d92db1f..0169c9d 100644
--- a/src/PeerManager.ts
+++ b/src/PeerManager.ts
@@ -714,28 +714,29 @@ class PeerConnection {
 
 
     while (this.dataChannel.bufferedAmount >= 8 * 1024 * 1024) {
-      await new Promise<void>((resolve, reject) => { setTimeout(()=> resolve(), 1000);
-    })
-  }
+      await new Promise<void>((resolve, reject) => {
+        setTimeout(() => resolve(), 1000);
+      })
+    }
 
     let messageJSON = JSON.stringify(message);
 
-this.messageSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]<-datachannel[${logID(this.peerManager.peerID)}]:`, message.type, message, `message size:${messageJSON.length}`));
+    this.messageSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]<-datachannel[${logID(this.peerManager.peerID)}]:`, message.type, message, `message size:${messageJSON.length}`));
 
-if (messageJSON.length > this.chunkSize) {
-  this.messageSuperlog && console.log.apply(null, log(`[datachannel] sending long message: `, messageJSON.length));
-  this.sendLongMessage(messageJSON);
-  return;
-}
+    if (messageJSON.length > this.chunkSize) {
+      this.messageSuperlog && console.log.apply(null, log(`[datachannel] sending long message: `, messageJSON.length));
+      this.sendLongMessage(messageJSON);
+      return;
+    }
 
 
 
-try {
-  this.dataChannel?.send(messageJSON);
-} catch (e) {
-  console.log.apply(null, log(e));
+    try {
+      this.dataChannel?.send(messageJSON);
+    } catch (e) {
+      console.log.apply(null, log(e));
 
-}
+    }
 
     // this.onMessage(messageJSON);
   }
@@ -743,140 +744,140 @@ try {
 
   // Get a polyfill for browsers that don't have this API
   async hashMessage(message: string) {
-  let msgUint8 = new TextEncoder().encode(message);
-  const hashBuffer = await crypto.subtle.digest("SHA-256", msgUint8);
-  const hashArray = Array.from(new Uint8Array(hashBuffer));
-  const hashHex = hashArray.map((b) => b.toString(16).padStart(2, "0")).join('');
-  return hashHex;
-}
+    let msgUint8 = new TextEncoder().encode(message);
+    const hashBuffer = await crypto.subtle.digest("SHA-256", msgUint8);
+    const hashArray = Array.from(new Uint8Array(hashBuffer));
+    const hashHex = hashArray.map((b) => b.toString(16).padStart(2, "0")).join('');
+    return hashHex;
+  }
 
   async sendLongMessage(message: string) {
-  // message = JSON.parse(message);
-  let chunkSize = this.chunkSize / 2;
-  // let chunkSize = 1024;
-  let chunks = Math.ceil(message!.length / chunkSize);
-  let messageID = generateID();
+    // message = JSON.parse(message);
+    let chunkSize = this.chunkSize / 2;
+    // let chunkSize = 1024;
+    let chunks = Math.ceil(message!.length / chunkSize);
+    let messageID = generateID();
 
-  let hash = await this.hashMessage(message);
+    let hash = await this.hashMessage(message);
 
-  for (let i = 0; i < chunks; i++) {
-    let offset = i * chunkSize;
-    let chunk = message?.substring(offset, offset + chunkSize);
-    // this.send(message?.substring(offset, offset + chunkSize-1));
-    // console.log("[chunk]", chunk);
-    let chunkHash = await this.hashMessage(chunk);
-    this.chunkSuperlog && console.log.apply(null, log(`[chunk] chunkHash:${logID(chunkHash)} from:${logID(this.peerManager.peerID)} to:${logID(this.remotePeerID)} messageID:${logID(messageID)} hash:${logID(hash)} ${i + 1}/${chunks}`));
+    for (let i = 0; i < chunks; i++) {
+      let offset = i * chunkSize;
+      let chunk = message?.substring(offset, offset + chunkSize);
+      // this.send(message?.substring(offset, offset + chunkSize-1));
+      // console.log("[chunk]", chunk);
+      let chunkHash = await this.hashMessage(chunk);
+      this.chunkSuperlog && console.log.apply(null, log(`[chunk] chunkHash:${logID(chunkHash)} from:${logID(this.peerManager.peerID)} to:${logID(this.remotePeerID)} messageID:${logID(messageID)} hash:${logID(hash)} ${i + 1}/${chunks}`));
 
-    let netMessage = { type: 'chunk', message_id: messageID, hash: hash, chunk_index: i, total_chunks: chunks, chunk: chunk, chunk_hash: chunkHash };
-    await this.send(netMessage);
+      let netMessage = { type: 'chunk', message_id: messageID, hash: hash, chunk_index: i, total_chunks: chunks, chunk: chunk, chunk_hash: chunkHash };
+      await this.send(netMessage);
+    }
   }
-}
 
 
 
 
-call(functionName: string, args: any) {
-  let transactionID = generateID(); // make this faster as we will only ever have a small number of in-flight queries on a peer
-  // Think about a timeout here to auto reject it after a while.
-  let promise = new Promise((resolve, reject) => {
-    this.pendingRPCs.set(transactionID, { resolve, reject, functionName });
-    // setTimeout(() => reject("bad"), 1000);
-  });
+  call(functionName: string, args: any) {
+    let transactionID = generateID(); // make this faster as we will only ever have a small number of in-flight queries on a peer
+    // Think about a timeout here to auto reject it after a while.
+    let promise = new Promise((resolve, reject) => {
+      this.pendingRPCs.set(transactionID, { resolve, reject, functionName });
+      // setTimeout(() => reject("bad"), 1000);
+    });
 
-  let message = {
-    type: "rpc_call",
-    transaction_id: transactionID,
-    function_name: functionName,
-    args: args,
-  };
+    let message = {
+      type: "rpc_call",
+      transaction_id: transactionID,
+      function_name: functionName,
+      args: args,
+    };
 
-  this.rpcSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]<-[rpc][${logID(this.peerManager.peerID)}]`, message.function_name, message.transaction_id, JSON.stringify(message.args, null, 2)));
+    this.rpcSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]<-[rpc][${logID(this.peerManager.peerID)}]`, message.function_name, message.transaction_id, JSON.stringify(message.args, null, 2)));
 
 
-  this.send(message);
+    this.send(message);
 
-  return promise;
-}
+    return promise;
+  }
 
   async onMessage(messageJSON: any) {
 
-  let message: any = {};
-  try {
-    message = JSON.parse(messageJSON);
-  } catch (e) {
-    console.log.apply(null, log("PeerConnection.onMessage:", e));
-  }
-
-  this.messageSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]->datachannel[${logID(this.peerManager.peerID)}]`, message.type, message));
-  let type = message.type;
-
-  if (type === "rpc_response") {
-    this.rpcSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]<-[rpc][${logID(this.peerManager.peerID)}] response: `, message.function_name, message.transaction_id, JSON.stringify(message.args, null, 2)));
-
-    let pendingRPC = this.pendingRPCs.get(message.transaction_id);
-
-    if (!pendingRPC) {
-      throw new Error();
+    let message: any = {};
+    try {
+      message = JSON.parse(messageJSON);
+    } catch (e) {
+      console.log.apply(null, log("PeerConnection.onMessage:", e));
     }
 
-    pendingRPC.resolve(message.response);
-  }
+    this.messageSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]->datachannel[${logID(this.peerManager.peerID)}]`, message.type, message));
+    let type = message.type;
 
-  if (type === "rpc_call") {
+    if (type === "rpc_response") {
+      this.rpcSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]<-[rpc][${logID(this.peerManager.peerID)}] response: `, message.function_name, message.transaction_id, JSON.stringify(message.args, null, 2)));
 
-    this.rpcSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]->[rpc][${logID(this.peerManager.peerID)}] call: `, message.function_name, message.transaction_id, JSON.stringify(message.args, null, 2)));
+      let pendingRPC = this.pendingRPCs.get(message.transaction_id);
 
-
-    let response = await this.peerManager.callFromRemote(message.function_name, message.args);
-
-    this.rpcSuperlog && console.log.apply(null, log(`[rpc] call: response:`, response));
-
-
-
-    if (response === undefined) {
-      return;
-    }
-
-    let responseMessage = { type: 'rpc_response', function_name: message.function_name, transaction_id: message.transaction_id, response: response };
-    this.send(responseMessage);
-
-  }
-
-  if (type === "initial_peers") {
-    for (let peerID of message.peers) {
-      console.log(log("Connecting to initial peer ", peerID));
-      this.peerManager.connectToPeer(peerID);
-    }
-  }
-
-  if (type === "chunk") {
-    let messageID = message.message_id;
-    if (!this.longMessages.has(messageID)) {
-      this.longMessages.set(messageID, { messageChunks: [], totalChunks: message.total_chunks, hash: message.hash });
-    }
-
-    let longMessage = this.longMessages.get(messageID);
-    if (!longMessage) {
-      return;
-    }
-
-    let chunkHash = await this.hashMessage(message.chunk_hash);
-
-    longMessage.messageChunks.push(message.chunk);
-
-    this.chunkSuperlog && console.log.apply(null, log(`[chunk] chunked message  sent chunkHash:${logID(message.chunk_hash)} computed hash: ${logID(chunkHash)} messageId:${logID(messageID)} chunk ${message.chunk_index + 1}/${longMessage.totalChunks}`));
-    if (message.chunk_index === longMessage.totalChunks - 1) {
-      let completeMessage = longMessage.messageChunks.join('');
-      let hash = await this.hashMessage(completeMessage);
-      this.chunkSuperlog && console.log.apply(null, log(`[chunk] hashes match: ${hash === longMessage.hash} sent hash: ${logID(longMessage.hash)} computed hash: ${logID(hash)}`));
-      if (hash !== longMessage.hash) {
-        throw new Error("[chunk] long message hashes don't match.");
+      if (!pendingRPC) {
+        throw new Error();
       }
-      this.onMessage(completeMessage);
-      this.longMessages.delete(messageID);
-    }
-  }
 
-  // this.peerManger.onMessage(this.remotePeerID, message);
-}
+      pendingRPC.resolve(message.response);
+    }
+
+    if (type === "rpc_call") {
+
+      this.rpcSuperlog && console.log.apply(null, log(`[${logID(this.remotePeerID)}]->[rpc][${logID(this.peerManager.peerID)}] call: `, message.function_name, message.transaction_id, JSON.stringify(message.args, null, 2)));
+
+
+      let response = await this.peerManager.callFromRemote(message.function_name, message.args);
+
+      this.rpcSuperlog && console.log.apply(null, log(`[rpc] call: response:`, response));
+
+
+
+      if (response === undefined) {
+        return;
+      }
+
+      let responseMessage = { type: 'rpc_response', function_name: message.function_name, transaction_id: message.transaction_id, response: response };
+      this.send(responseMessage);
+
+    }
+
+    if (type === "initial_peers") {
+      for (let peerID of message.peers) {
+        console.log(log("Connecting to initial peer ", peerID));
+        this.peerManager.connectToPeer(peerID);
+      }
+    }
+
+    if (type === "chunk") {
+      let messageID = message.message_id;
+      if (!this.longMessages.has(messageID)) {
+        this.longMessages.set(messageID, { messageChunks: [], totalChunks: message.total_chunks, hash: message.hash });
+      }
+
+      let longMessage = this.longMessages.get(messageID);
+      if (!longMessage) {
+        return;
+      }
+
+      let chunkHash = await this.hashMessage(message.chunk_hash);
+
+      longMessage.messageChunks.push(message.chunk);
+
+      this.chunkSuperlog && console.log.apply(null, log(`[chunk] chunked message  sent chunkHash:${logID(message.chunk_hash)} computed hash: ${logID(chunkHash)} messageId:${logID(messageID)} chunk ${message.chunk_index + 1}/${longMessage.totalChunks}`));
+      if (message.chunk_index === longMessage.totalChunks - 1) {
+        let completeMessage = longMessage.messageChunks.join('');
+        let hash = await this.hashMessage(completeMessage);
+        this.chunkSuperlog && console.log.apply(null, log(`[chunk] hashes match: ${hash === longMessage.hash} sent hash: ${logID(longMessage.hash)} computed hash: ${logID(hash)}`));
+        if (hash !== longMessage.hash) {
+          throw new Error("[chunk] long message hashes don't match.");
+        }
+        this.onMessage(completeMessage);
+        this.longMessages.delete(messageID);
+      }
+    }
+
+    // this.peerManger.onMessage(this.remotePeerID, message);
+  }
 }
diff --git a/src/Sync.ts b/src/Sync.ts
index 08cfe40..5f864bd 100644
--- a/src/Sync.ts
+++ b/src/Sync.ts
@@ -181,12 +181,12 @@ export class Sync {
     async checkPostIds(userID: string, peerID: string, postIDs: string[]) {
         let startTime = performance.now();
         let neededPostIds = await checkPostIds(userID, postIDs);
-        console.log.apply(null, log(`ID Check for user ${logID(userID)} took ${(performance.now() - startTime).toFixed(2)}ms`));
+        this.syncSuperlog && console.log.apply(null, log(`[sync] ID Check for user ${logID(userID)} with IDs from peer[${logID(peerID)}] took ${(performance.now() - startTime).toFixed(2)}ms`));
 
         if (neededPostIds.length > 0) {
-            console.log.apply(null, log(`Need posts (${neededPostIds.length}) for user ${logID(userID)} from peer ${logID(peerID)}`));;
+            this.syncSuperlog && console.log.apply(null, log(`[sync] Need posts (${neededPostIds.length}) for user[${logID(userID)}] from peer[${logID(peerID)}]`));;
         } else {
-            console.log.apply(null, log(`Don't need any posts for user ${logID(userID)} from peer ${logID(peerID)}`));;
+            this.syncSuperlog && console.log.apply(null, log(`[sync] Don't need any posts for user[${logID(userID)}] from peer[${logID(peerID)}]`));;
 
         }