diff --git a/src/routes/invitations.ts b/src/routes/invitations.ts
index eb7f08f..428347b 100644
--- a/src/routes/invitations.ts
+++ b/src/routes/invitations.ts
@@ -5,6 +5,7 @@ import type { StoreSQLite } from '../services/invitation-store.js';
 import { parseInvitation } from '../utils/invitation-parser.js';
 
 import Z from 'zod';
+import { encodeExtendedJson } from '../utils/ext-json.js';
 
 export class InvitationsRoute {
   constructor(
@@ -27,6 +28,12 @@ export class InvitationsRoute {
     ];
   }
 
+  /**
+   * Get an invitation, and if the text/event-stream header is present, subscribe the client to the SSE stream.
+   * @param request - The request.
+   * @param reply - The reply.
+   * @returns The invitation.
+   */
   async getInvitation(request: FastifyRequest, reply: FastifyReply) {
     // Get the invitation identifier from the query
     const { invitationIdentifier } = request.query as { invitationIdentifier?: string };
@@ -39,30 +46,29 @@ export class InvitationsRoute {
     // Get the invitation from the store
     const storedInvitation = await this.invitationStore.get(invitationIdentifier);
 
-    if (request.headers['accept'] === 'text/event-stream') {
-      // Subscribe the client to the SSE stream.
-      await this.sseBroadcaster.subscribe(request, reply);
+    // If the client is not subscribing to the SSE stream, return the invitation.
+    if (request.headers['accept'] !== 'text/event-stream') {
+      return encodeExtendedJson(storedInvitation || {});
+    }
 
-      // If the invitation doesn't exist, don't send anything.
-      if (!storedInvitation) {
-        return;
-      }
+    // Its an SSE request, so we need to subscribe the client to the SSE stream.
+    await this.sseBroadcaster.subscribe(request, reply);
 
-      // Send the invitation to the client as if it was a get request.
-      this.sseBroadcaster.sendEvent(reply, 'invitation-updated', storedInvitation);
-
-      // Return early
+    // If the invitation doesn't exist, don't send anything.
+    if (!storedInvitation) {
       return;
     }
 
-    if(!storedInvitation) {
-      return reply.status(200).send({});
-    }
-
-    // If the client is not subscribing to the SSE stream, return the invitation.
-    return reply.status(200).send(storedInvitation);
+    // Send the invitation to the client as if it was a get request.
+    this.sseBroadcaster.sendEvent(reply, 'invitation-updated', storedInvitation);
   }
 
+  /**
+   * Update the invitation.
+   * @param request - The request.
+   * @param reply - The reply.
+   * @returns The merged invitation.
+   */
   async updateInvitation(request: FastifyRequest, reply: FastifyReply) {
     // Parse the invitation
     const invitation = parseInvitation.parse(request.body);
@@ -79,7 +85,7 @@ export class InvitationsRoute {
     // Broadcast the invitation update (We send down the whole invitation. Clients will have to compare commitIds)
     await this.sseBroadcaster.broadcast(invitation.invitationIdentifier, 'invitation-updated', invitation);
 
-    return reply.status(200).send(invitation);
+    return invitation;
   }
 
   /**
diff --git a/src/services/http-router.ts b/src/services/http-router.ts
index 4d173cc..ecfc5a3 100644
--- a/src/services/http-router.ts
+++ b/src/services/http-router.ts
@@ -5,7 +5,7 @@ import { z } from "zod";
 import {
   decodeExtendedJsonObject,
   encodeExtendedJsonObject,
-} from "../utils/ext-json";
+} from "../utils/ext-json.js";
 
 // Interface to add to our route classes so that we can register them.
 // NOTE: I hate this pattern. But ExpressJS is odd in that it is structured as a singleton that still needs registration.
diff --git a/src/services/invitation-store.ts b/src/services/invitation-store.ts
index 0a3a397..b9a6c31 100644
--- a/src/services/invitation-store.ts
+++ b/src/services/invitation-store.ts
@@ -1,5 +1,7 @@
 import sqlite3, { type Database } from 'better-sqlite3';
 import { pack, unpack } from 'msgpackr';
+import { encodeExtendedJsonObject, decodeExtendedJsonObject } from '../utils/ext-json.js';
+import { binToHex, hexToBin } from '@bitauth/libauth';
 
 export interface SQLiteOptions {
   wal: boolean;
@@ -107,25 +109,34 @@ export class StoreSQLite<T> {
   async get(key: string): Promise<T | undefined> {
     const result = this.db
       .prepare(`SELECT value FROM "${this.storeName}" WHERE key = ?`)
-      .get(key) as { value: Buffer } | undefined;
+      .get(key) as { value: string } | undefined;
 
     if (!result) {
       return undefined;
     }
 
-    // Deserialize using msgpackr for consistency with other implementations
-    return unpack(result.value) as T;
+    const binValue = hexToBin(result.value);
+    
+    const unpackedValue = unpack(binValue);
+    
+    const decodedValue = decodeExtendedJsonObject(unpackedValue);
+    
+    return decodedValue as T;
   }
 
   async set(key: string, value: T): Promise<void> {
+    const encodedValue = encodeExtendedJsonObject(value);
+    
     // Serialize using msgpackr for consistency with other implementations
-    const serializedValue = pack(value);
+    const packedValue = pack(encodedValue);
+
+    const serializedValue = binToHex(packedValue);
 
     this.db
       .prepare(
         `INSERT OR REPLACE INTO "${this.storeName}" (key, value) VALUES (?, ?)`,
       )
-      .run(key, Buffer.from(serializedValue));
+      .run(key, serializedValue);
   }
 
   async delete(key: string): Promise<void> {
diff --git a/src/services/sse-broadcast.ts b/src/services/sse-broadcast.ts
index db82bbb..b308b8d 100644
--- a/src/services/sse-broadcast.ts
+++ b/src/services/sse-broadcast.ts
@@ -2,6 +2,8 @@ import type { FastifyReply, FastifyRequest } from "fastify";
 
 import debug, { type Debugger } from "debug";
 
+import { encodeExtendedJson } from "../utils/ext-json.js";
+
 /**
  * Represents an event stored in the history buffer.
  * Used for replaying missed events to reconnecting clients.
@@ -87,7 +89,7 @@ export class SSEBroadcaster {
     const timestamp = Date.now();
     client.raw.write(`id: ${timestamp}\n`);
     client.raw.write(`event: ${topic}\n`);
-    client.raw.write(`data: ${JSON.stringify(data)}\n\n`);
+    client.raw.write(`data: ${encodeExtendedJson(data)}\n\n`);
   }
 
   /**