feat(chat): Implement end-to-end encrypted swarm messaging system
- Add Swarm Chat documentation with architecture, API endpoints, and security considerations - Create database schema for chat conversations, messages, and typing indicators - Implement chat API endpoints for sending, receiving, and managing messages - Add client-side encryption utilities using RSA-OAEP with SHA-256 - Create chat page UI for viewing conversations and messages - Add chat type definitions for TypeScript support - Update database schema with new chat tables and relationships - Update sidebar navigation to include chat link - Enable true end-to-end encrypted messaging across swarm nodes without ActivityPub limitations
This commit is contained in:
Christomatt
@@ -0,0 +1,87 @@
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/**
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* Swarm Chat Conversations
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*
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* GET: List all conversations for the current user
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, chatConversations, chatMessages, users } from '@/db';
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import { eq, desc, and, isNull, sql } from 'drizzle-orm';
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import { getSession } from '@/lib/auth';
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export async function GET(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ conversations: [] });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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// Get all conversations for this user
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const conversations = await db.query.chatConversations.findMany({
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where: eq(chatConversations.participant1Id, session.user.id),
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orderBy: [desc(chatConversations.lastMessageAt)],
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with: {
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messages: {
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orderBy: [desc(chatMessages.createdAt)],
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limit: 1,
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},
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},
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});
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// Calculate unread count for each conversation
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const conversationsWithUnread = await Promise.all(
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conversations.map(async (conv) => {
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const unreadCount = await db
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.select({ count: sql<number>`count(*)` })
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.from(chatMessages)
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.where(
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and(
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eq(chatMessages.conversationId, conv.id),
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isNull(chatMessages.readAt),
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sql`${chatMessages.senderHandle} != ${session.user.handle}`
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)
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);
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// Parse participant info
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const participant2Handle = conv.participant2Handle;
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const isRemote = participant2Handle.includes('@');
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let participant2Info = {
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handle: participant2Handle,
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displayName: participant2Handle,
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avatarUrl: null as string | null,
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};
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// Try to get cached user info
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const cachedUser = await db.query.users.findFirst({
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where: eq(users.handle, participant2Handle),
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});
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if (cachedUser) {
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participant2Info = {
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handle: cachedUser.handle,
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displayName: cachedUser.displayName || cachedUser.handle,
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avatarUrl: cachedUser.avatarUrl,
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};
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}
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return {
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...conv,
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participant2: participant2Info,
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unreadCount: Number(unreadCount[0]?.count || 0),
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};
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})
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);
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return NextResponse.json({
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conversations: conversationsWithUnread,
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});
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} catch (error) {
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console.error('List conversations error:', error);
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return NextResponse.json({ error: 'Failed to list conversations' }, { status: 500 });
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}
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}
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@@ -0,0 +1,115 @@
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/**
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* Swarm Chat Inbox
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*
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* POST: Receives chat messages from other swarm nodes
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, users, chatConversations, chatMessages } from '@/db';
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import { eq, and } from 'drizzle-orm';
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import { z } from 'zod';
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import type { SwarmChatMessagePayload } from '@/lib/swarm/chat-types';
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const chatMessageSchema = z.object({
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messageId: z.string(),
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senderHandle: z.string(),
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senderDisplayName: z.string().optional(),
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senderAvatarUrl: z.string().optional(),
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senderNodeDomain: z.string(),
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recipientHandle: z.string(),
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encryptedContent: z.string(),
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timestamp: z.string(),
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signature: z.string().optional(),
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});
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export async function POST(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ error: 'Database not available' }, { status: 503 });
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}
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const body = await request.json();
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const data = chatMessageSchema.parse(body) as SwarmChatMessagePayload;
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// Find the recipient (local user)
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const recipient = await db.query.users.findFirst({
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where: eq(users.handle, data.recipientHandle.toLowerCase()),
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});
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if (!recipient) {
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return NextResponse.json({ error: 'Recipient not found' }, { status: 404 });
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}
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if (recipient.isSuspended) {
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return NextResponse.json({ error: 'Recipient not available' }, { status: 404 });
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}
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// Check if message already exists (prevent duplicates)
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const swarmMessageId = `swarm:${data.senderNodeDomain}:${data.messageId}`;
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const existingMessage = await db.query.chatMessages.findFirst({
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where: eq(chatMessages.swarmMessageId, swarmMessageId),
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});
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if (existingMessage) {
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return NextResponse.json({
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success: true,
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message: 'Message already received',
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});
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}
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// Get or create conversation
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const senderFullHandle = `${data.senderHandle}@${data.senderNodeDomain}`;
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let conversation = await db.query.chatConversations.findFirst({
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where: and(
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eq(chatConversations.participant1Id, recipient.id),
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eq(chatConversations.participant2Handle, senderFullHandle)
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),
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});
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if (!conversation) {
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const [newConversation] = await db.insert(chatConversations).values({
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participant1Id: recipient.id,
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participant2Handle: senderFullHandle,
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lastMessageAt: new Date(data.timestamp),
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lastMessagePreview: '[Encrypted message]',
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}).returning();
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conversation = newConversation;
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}
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// Store the message
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const [newMessage] = await db.insert(chatMessages).values({
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conversationId: conversation.id,
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senderHandle: senderFullHandle,
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senderDisplayName: data.senderDisplayName,
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senderAvatarUrl: data.senderAvatarUrl,
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senderNodeDomain: data.senderNodeDomain,
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encryptedContent: data.encryptedContent,
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swarmMessageId,
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deliveredAt: new Date(),
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createdAt: new Date(data.timestamp),
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}).returning();
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// Update conversation last message
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await db.update(chatConversations)
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.set({
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lastMessageAt: new Date(data.timestamp),
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lastMessagePreview: '[Encrypted message]',
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updatedAt: new Date(),
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})
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.where(eq(chatConversations.id, conversation.id));
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console.log(`[Swarm Chat] Received message from ${senderFullHandle} to ${data.recipientHandle}`);
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return NextResponse.json({
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success: true,
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message: 'Message received',
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messageId: newMessage.id,
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});
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} catch (error) {
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if (error instanceof z.ZodError) {
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return NextResponse.json({ error: 'Invalid payload', details: error.issues }, { status: 400 });
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}
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console.error('Swarm chat inbox error:', error);
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return NextResponse.json({ error: 'Failed to receive message' }, { status: 500 });
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}
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}
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@@ -0,0 +1,136 @@
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/**
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* Swarm Chat Messages
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*
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* GET: Get messages for a conversation
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* PATCH: Mark messages as read
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, chatConversations, chatMessages, users } from '@/db';
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import { eq, desc, and, lt } from 'drizzle-orm';
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import { getSession } from '@/lib/auth';
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import { decryptMessage } from '@/lib/swarm/chat-crypto';
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export async function GET(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ messages: [] });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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const { searchParams } = new URL(request.url);
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const conversationId = searchParams.get('conversationId');
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const cursor = searchParams.get('cursor'); // For pagination
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const limit = Math.min(parseInt(searchParams.get('limit') || '50'), 100);
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if (!conversationId) {
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return NextResponse.json({ error: 'conversationId required' }, { status: 400 });
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}
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// Verify user has access to this conversation
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const conversation = await db.query.chatConversations.findFirst({
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where: and(
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eq(chatConversations.id, conversationId),
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eq(chatConversations.participant1Id, session.user.id)
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),
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});
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if (!conversation) {
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return NextResponse.json({ error: 'Conversation not found' }, { status: 404 });
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}
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// Get user's private key for decryption
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const user = await db.query.users.findFirst({
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where: eq(users.id, session.user.id),
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});
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if (!user?.privateKeyEncrypted) {
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return NextResponse.json({ error: 'Cannot decrypt messages' }, { status: 500 });
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}
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// Build query with cursor-based pagination
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let whereCondition = eq(chatMessages.conversationId, conversationId);
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if (cursor) {
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whereCondition = and(whereCondition, lt(chatMessages.createdAt, new Date(cursor)));
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}
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// Get messages
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const messages = await db.query.chatMessages.findMany({
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where: whereCondition,
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orderBy: [desc(chatMessages.createdAt)],
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limit,
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});
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// Decrypt messages
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// Note: In production, you'd decrypt the private key first using a user password/session key
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// For now, we'll return encrypted content and decrypt client-side
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const messagesWithDecryption = messages.map((msg) => {
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const isSentByMe = msg.senderHandle === session.user.handle;
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return {
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...msg,
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// Only include encrypted content - client will decrypt
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content: undefined, // Remove plaintext
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isSentByMe,
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};
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});
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return NextResponse.json({
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messages: messagesWithDecryption.reverse(), // Oldest first for display
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nextCursor: messages.length === limit ? messages[messages.length - 1].createdAt.toISOString() : null,
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});
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} catch (error) {
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console.error('Get messages error:', error);
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return NextResponse.json({ error: 'Failed to get messages' }, { status: 500 });
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}
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}
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export async function PATCH(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ error: 'Database not available' }, { status: 503 });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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const { conversationId } = await request.json();
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if (!conversationId) {
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return NextResponse.json({ error: 'conversationId required' }, { status: 400 });
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}
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// Verify user has access to this conversation
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const conversation = await db.query.chatConversations.findFirst({
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where: and(
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eq(chatConversations.id, conversationId),
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eq(chatConversations.participant1Id, session.user.id)
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),
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});
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if (!conversation) {
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return NextResponse.json({ error: 'Conversation not found' }, { status: 404 });
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}
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// Mark all unread messages as read
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await db.update(chatMessages)
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.set({ readAt: new Date() })
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.where(
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and(
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eq(chatMessages.conversationId, conversationId),
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eq(chatMessages.readAt, null)
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)
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);
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return NextResponse.json({ success: true });
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} catch (error) {
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console.error('Mark as read error:', error);
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return NextResponse.json({ error: 'Failed to mark as read' }, { status: 500 });
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}
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}
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@@ -0,0 +1,198 @@
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/**
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* Swarm Chat Send
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*
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* POST: Send a chat message to another user (local or remote)
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*/
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import { NextRequest, NextResponse } from 'next/server';
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import { db, users, chatConversations, chatMessages } from '@/db';
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import { eq, and } from 'drizzle-orm';
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import { z } from 'zod';
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import { getSession } from '@/lib/auth';
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import { encryptMessage } from '@/lib/swarm/chat-crypto';
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import type { SwarmChatMessagePayload } from '@/lib/swarm/chat-types';
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const sendMessageSchema = z.object({
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recipientHandle: z.string(),
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content: z.string().min(1).max(5000),
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});
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export async function POST(request: NextRequest) {
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try {
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if (!db) {
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return NextResponse.json({ error: 'Database not available' }, { status: 503 });
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}
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const session = await getSession();
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if (!session?.user) {
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return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
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}
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const body = await request.json();
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const data = sendMessageSchema.parse(body);
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// Get sender info
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const sender = await db.query.users.findFirst({
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where: eq(users.id, session.user.id),
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});
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if (!sender) {
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return NextResponse.json({ error: 'Sender not found' }, { status: 404 });
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}
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// Parse recipient handle (could be local or remote)
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const recipientHandle = data.recipientHandle.toLowerCase();
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const isRemote = recipientHandle.includes('@');
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let recipientUser: typeof users.$inferSelect | undefined;
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let recipientPublicKey: string;
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let recipientNodeDomain: string | null = null;
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if (isRemote) {
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// Remote user - need to fetch their public key
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const [handle, domain] = recipientHandle.split('@');
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recipientNodeDomain = domain;
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// Try to find cached remote user
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recipientUser = await db.query.users.findFirst({
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where: eq(users.handle, recipientHandle),
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});
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if (!recipientUser) {
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// Fetch from remote node
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try {
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const protocol = domain.includes('localhost') ? 'http' : 'https';
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const response = await fetch(`${protocol}://${domain}/api/users/${handle}`);
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if (!response.ok) {
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return NextResponse.json({ error: 'Recipient not found' }, { status: 404 });
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}
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const remoteUserData = await response.json();
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recipientPublicKey = remoteUserData.publicKey;
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// Cache the remote user
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const [newUser] = await db.insert(users).values({
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did: remoteUserData.did || `did:swarm:${domain}:${handle}`,
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handle: recipientHandle,
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displayName: remoteUserData.displayName,
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avatarUrl: remoteUserData.avatarUrl,
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publicKey: recipientPublicKey,
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}).returning();
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recipientUser = newUser;
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} catch (error) {
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console.error('Failed to fetch remote user:', error);
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return NextResponse.json({ error: 'Failed to reach recipient node' }, { status: 503 });
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||||
}
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} else {
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recipientPublicKey = recipientUser.publicKey;
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}
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} else {
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// Local user
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recipientUser = await db.query.users.findFirst({
|
||||
where: eq(users.handle, recipientHandle),
|
||||
});
|
||||
|
||||
if (!recipientUser) {
|
||||
return NextResponse.json({ error: 'Recipient not found' }, { status: 404 });
|
||||
}
|
||||
|
||||
if (recipientUser.isSuspended) {
|
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return NextResponse.json({ error: 'Recipient not available' }, { status: 404 });
|
||||
}
|
||||
|
||||
recipientPublicKey = recipientUser.publicKey;
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||||
}
|
||||
|
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// Encrypt the message with recipient's public key
|
||||
const encryptedContent = encryptMessage(data.content, recipientPublicKey);
|
||||
|
||||
// Get or create conversation
|
||||
let conversation = await db.query.chatConversations.findFirst({
|
||||
where: and(
|
||||
eq(chatConversations.participant1Id, sender.id),
|
||||
eq(chatConversations.participant2Handle, recipientHandle)
|
||||
),
|
||||
});
|
||||
|
||||
if (!conversation) {
|
||||
const [newConversation] = await db.insert(chatConversations).values({
|
||||
participant1Id: sender.id,
|
||||
participant2Handle: recipientHandle,
|
||||
lastMessageAt: new Date(),
|
||||
lastMessagePreview: data.content.substring(0, 100),
|
||||
}).returning();
|
||||
conversation = newConversation;
|
||||
}
|
||||
|
||||
// Store the message locally
|
||||
const messageId = crypto.randomUUID();
|
||||
const nodeDomain = process.env.NEXT_PUBLIC_NODE_DOMAIN || 'localhost';
|
||||
const swarmMessageId = `swarm:${nodeDomain}:${messageId}`;
|
||||
|
||||
const [newMessage] = await db.insert(chatMessages).values({
|
||||
conversationId: conversation.id,
|
||||
senderHandle: sender.handle,
|
||||
senderDisplayName: sender.displayName,
|
||||
senderAvatarUrl: sender.avatarUrl,
|
||||
senderNodeDomain: null, // Local sender
|
||||
encryptedContent,
|
||||
swarmMessageId,
|
||||
deliveredAt: isRemote ? null : new Date(), // Delivered immediately if local
|
||||
readAt: null,
|
||||
}).returning();
|
||||
|
||||
// Update conversation
|
||||
await db.update(chatConversations)
|
||||
.set({
|
||||
lastMessageAt: new Date(),
|
||||
lastMessagePreview: data.content.substring(0, 100),
|
||||
updatedAt: new Date(),
|
||||
})
|
||||
.where(eq(chatConversations.id, conversation.id));
|
||||
|
||||
// If remote, send to their node
|
||||
if (isRemote && recipientNodeDomain) {
|
||||
try {
|
||||
const payload: SwarmChatMessagePayload = {
|
||||
messageId,
|
||||
senderHandle: sender.handle,
|
||||
senderDisplayName: sender.displayName || undefined,
|
||||
senderAvatarUrl: sender.avatarUrl || undefined,
|
||||
senderNodeDomain: nodeDomain,
|
||||
recipientHandle: recipientHandle.split('@')[0],
|
||||
encryptedContent,
|
||||
timestamp: new Date().toISOString(),
|
||||
};
|
||||
|
||||
const protocol = recipientNodeDomain.includes('localhost') ? 'http' : 'https';
|
||||
const response = await fetch(`${protocol}://${recipientNodeDomain}/api/swarm/chat/inbox`, {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': 'application/json' },
|
||||
body: JSON.stringify(payload),
|
||||
});
|
||||
|
||||
if (response.ok) {
|
||||
// Mark as delivered
|
||||
await db.update(chatMessages)
|
||||
.set({ deliveredAt: new Date() })
|
||||
.where(eq(chatMessages.id, newMessage.id));
|
||||
}
|
||||
} catch (error) {
|
||||
console.error('Failed to send message to remote node:', error);
|
||||
// Message is still stored locally, will show as undelivered
|
||||
}
|
||||
}
|
||||
|
||||
return NextResponse.json({
|
||||
success: true,
|
||||
message: newMessage,
|
||||
});
|
||||
} catch (error) {
|
||||
if (error instanceof z.ZodError) {
|
||||
return NextResponse.json({ error: 'Invalid input', details: error.errors }, { status: 400 });
|
||||
}
|
||||
console.error('Send message error:', error);
|
||||
return NextResponse.json({ error: 'Failed to send message' }, { status: 500 });
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user