fixed some type errors

.github/workflows/publish.yml

@@ -26,11 +26,6 @@ jobs:
       - name: Install dependencies
         run: pnpm install
 
-      - name: Publish to npm as alpha
-        run: npm publish --tag alpha --access public
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-
       - name: Publish to npm as latest
         run: npm publish --tag latest --access public
         env:

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx lint-staged

.lintstagedrc

@@ -0,0 +1,10 @@
+{
+  "*.{js,ts}": [
+    "prettier --write",
+    "eslint --fix",
+    "npm run build"
+  ],
+  "*.{json,md}": [
+    "prettier --write"
+  ]
+}

.prettierrc

@@ -0,0 +1,8 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "all",
+  "printWidth": 100,
+  "tabWidth": 2,
+  "endOfLine": "auto"
+}

README.md

@@ -1,14 +1,21 @@
-# @debros/netowrk
+# @debros/network
 
-Core networking functionality for the Debros decentralized network. This package provides essential IPFS, libp2p, and OrbitDB functionality to build decentralized applications on the Debros network.
+Core networking functionality for the Debros decentralized network. This package provides a powerful database interface with advanced features built on IPFS and OrbitDB for decentralized applications.
 
 ## Features
 
-- Pre-configured IPFS/libp2p node setup
-- Service discovery for peer-to-peer communication
-- OrbitDB integration for distributed databases
-- Consistent logging across network components
-- Secure key generation
+- Rich database-like API with TypeScript support
+- Multiple database store types (KeyValue, Document, Feed, Counter)
+- Document operations with schema validation
+- Advanced querying with pagination, sorting and filtering
+- Transaction support for batch operations
+- Built-in file storage with metadata
+- Real-time subscriptions for data changes
+- Memory caching for performance
+- Connection pooling for managing multiple database instances
+- Index creation for faster queries
+- Comprehensive error handling with error codes
+- Performance metrics and monitoring
 
 ## Installation
 
@@ -19,80 +26,296 @@ npm install @debros/network
 ## Basic Usage
 
 ```typescript
-import { initConfig, initIpfs, initOrbitDB, logger } from "@debros/network";
+import { initDB, create, get, query, uploadFile, logger } from "@debros/network";
 
-// Initialize with custom configuration (optional)
-const config = initConfig({
-  env: {
-    fingerprint: "my-unique-node-id",
-    port: 8080,
-  },
-  ipfs: {
-    bootstrapNodes: "node1,node2,node3",
-  },
-});
-
-// Start the network node
-async function startNode() {
+// Initialize the database service
+async function startApp() {
   try {
-    // Initialize IPFS
-    const ipfs = await initIpfs();
+    // Initialize with default configuration
+    await initDB();
+    logger.info("Database initialized successfully");
     
-    // Initialize OrbitDB with the IPFS instance
-    const orbitdb = await initOrbitDB({ getHelia: () => ipfs });
+    // Create a new user document
+    const userId = 'user123';
+    const user = {
+      username: 'johndoe',
+      walletAddress: '0x1234567890',
+      avatar: null
+    };
     
-    // Create/open a database
-    const db = await orbitDB("myDatabase", "feed");
+    const result = await create('users', userId, user);
+    logger.info(`Created user with ID: ${result.id}`);
     
-    logger.info("Node started successfully");
+    // Get a user by ID
+    const retrievedUser = await get('users', userId);
+    logger.info('User:', retrievedUser);
     
-    return { ipfs, orbitdb, db };
+    // Query users with filtering
+    const activeUsers = await query('users', 
+      user => user.isActive === true,
+      { limit: 10, sort: { field: 'createdAt', order: 'desc' } }
+    );
+    logger.info(`Found ${activeUsers.total} active users`);
+    
+    // Upload a file
+    const fileData = Buffer.from('File content');
+    const fileUpload = await uploadFile(fileData, { filename: 'document.txt' });
+    logger.info(`Uploaded file with CID: ${fileUpload.cid}`);
+    
+    return true;
   } catch (error) {
-    logger.error("Failed to start node:", error);
+    logger.error("Failed to start app:", error);
     throw error;
   }
 }
 
-startNode();
+startApp();
 ```
 
-## Configuration
+## Database Store Types
 
-The package provides sensible defaults but can be customized:
+The library supports multiple OrbitDB store types, each optimized for different use cases:
 
 ```typescript
-import { initConfig } from "@debros/network";
+import { create, get, update, StoreType } from "@debros/network";
 
-const customConfig = initConfig({
-  env: {
-    fingerprint: "unique-fingerprint",
-    port: 9000,
+// Default KeyValue store (for general use)
+await create('users', 'user1', { name: 'Alice' });
+
+// Document store (better for complex documents with indexing)
+await create('posts', 'post1', { title: 'Hello', content: '...' }, 
+  { storeType: StoreType.DOCSTORE }
+);
+
+// Feed/EventLog store (append-only, good for immutable logs)
+await create('events', 'evt1', { type: 'login', user: 'alice' }, 
+  { storeType: StoreType.FEED }
+);
+
+// Counter store (for numeric counters)
+await create('stats', 'visits', { value: 0 }, 
+  { storeType: StoreType.COUNTER }
+);
+
+// Increment a counter
+await update('stats', 'visits', { increment: 1 }, 
+  { storeType: StoreType.COUNTER }
+);
+
+// Get counter value
+const stats = await get('stats', 'visits', { storeType: StoreType.COUNTER });
+console.log(`Visit count: ${stats.value}`);
+```
+
+## Advanced Features
+
+### Schema Validation
+
+```typescript
+import { defineSchema, create } from "@debros/network";
+
+// Define a schema
+defineSchema('users', {
+  properties: {
+    username: {
+      type: 'string',
+      required: true,
+      min: 3,
+      max: 20
     },
-  ipfs: {
-    blockstorePath: "./custom-blockstore",
-    serviceDiscovery: {
-      topic: "my-custom-topic",
-      heartbeatInterval: 10000,
+    email: {
+      type: 'string',
+      pattern: '^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$'
     },
+    age: {
+      type: 'number',
+      min: 18
+    }
   },
-  orbitdb: {
-    directory: "./custom-orbitdb",
-  },
+  required: ['username']
+});
+
+// Document creation will be validated against the schema
+await create('users', 'user1', {
+  username: 'alice',
+  email: 'alice@example.com',
+  age: 25
 });
 ```
 
-## Documentation
+### Transactions
 
-### Core Modules
+```typescript
+import { createTransaction, commitTransaction } from "@debros/network";
 
-- **IPFS Service**: Setup and manage IPFS nodes
-- **OrbitDB Service**: Distributed database management
-- **Config**: Network configuration
-- **Logger**: Consistent logging
+// Create a transaction
+const transaction = createTransaction();
 
-### Main Exports
+// Add multiple operations
+transaction
+  .create('posts', 'post1', { title: 'Hello World', content: '...' })
+  .update('users', 'user1', { postCount: 1 })
+  .delete('drafts', 'draft1');
 
-- `initConfig`: Configure the network node
-- `ipfsService`: IPFS node management
-- `orbitDBService`: OrbitDB operations
-- `logger`: Logging utilities
+// Commit all operations
+const result = await commitTransaction(transaction);
+console.log(`Transaction completed with ${result.results.length} operations`);
+```
+
+### Subscriptions
+
+```typescript
+import { subscribe } from "@debros/network";
+
+// Subscribe to document changes
+const unsubscribe = subscribe('document:created', (data) => {
+  console.log(`New document created in ${data.collection}:`, data.id);
+});
+
+// Later, unsubscribe
+unsubscribe();
+```
+
+### Pagination and Sorting
+
+```typescript
+import { list, query } from "@debros/network";
+
+// List with pagination and sorting
+const page1 = await list('users', {
+  limit: 10,
+  offset: 0,
+  sort: { field: 'createdAt', order: 'desc' }
+});
+
+// Query with pagination
+const results = await query('users', 
+  (user) => user.age > 21, 
+  { limit: 10, offset: 20 }
+);
+
+console.log(`Found ${results.total} matches, showing ${results.documents.length}`);
+console.log(`Has more pages: ${results.hasMore}`);
+```
+
+### TypeScript Support
+
+```typescript
+import { get, update, query } from "@debros/network";
+
+interface User {
+  username: string;
+  email: string;
+  age: number;
+  createdAt: number;
+  updatedAt: number;
+}
+
+// Type-safe operations
+const user = await get<User>('users', 'user1');
+
+await update<User>('users', 'user1', { age: 26 });
+
+const results = await query<User>('users', 
+  (user) => user.age > 21
+);
+```
+
+### Connection Management
+
+```typescript
+import { initDB, closeConnection } from "@debros/network";
+
+// Create multiple connections
+const conn1 = await initDB('connection1');
+const conn2 = await initDB('connection2');
+
+// Use specific connection
+await create('users', 'user1', { name: 'Alice' }, { connectionId: conn1 });
+
+// Close a specific connection
+await closeConnection(conn1);
+```
+
+### Performance Metrics
+
+```typescript
+import { getMetrics, resetMetrics } from "@debros/network";
+
+// Get performance metrics
+const metrics = getMetrics();
+console.log('Operations:', metrics.operations);
+console.log('Avg operation time:', metrics.performance.averageOperationTime, 'ms');
+console.log('Cache hits/misses:', metrics.cacheStats);
+
+// Reset metrics (e.g., after deployment)
+resetMetrics();
+```
+
+## API Reference
+
+### Core Database Operations
+
+- `initDB(connectionId?: string): Promise<string>` - Initialize the database
+- `create<T>(collection, id, data, options?): Promise<CreateResult>` - Create a document
+- `get<T>(collection, id, options?): Promise<T | null>` - Get a document by ID
+- `update<T>(collection, id, data, options?): Promise<UpdateResult>` - Update a document
+- `remove(collection, id, options?): Promise<boolean>` - Delete a document
+- `list<T>(collection, options?): Promise<PaginatedResult<T>>` - List documents with pagination
+- `query<T>(collection, filter, options?): Promise<PaginatedResult<T>>` - Query documents
+- `stopDB(): Promise<void>` - Stop the database service
+
+### Store Types
+
+- `StoreType.KEYVALUE` - Key-value pair storage (default)
+- `StoreType.DOCSTORE` - Document storage with indexing
+- `StoreType.FEED` - Append-only log
+- `StoreType.EVENTLOG` - Alias for FEED
+- `StoreType.COUNTER` - Numeric counter
+
+### Schema Validation
+
+- `defineSchema(collection, schema): void` - Define a schema for a collection
+
+### Transactions
+
+- `createTransaction(connectionId?): Transaction` - Create a new transaction
+- `commitTransaction(transaction): Promise<{success, results}>` - Execute the transaction
+- `Transaction.create<T>(collection, id, data): Transaction` - Add a create operation
+- `Transaction.update<T>(collection, id, data): Transaction` - Add an update operation
+- `Transaction.delete(collection, id): Transaction` - Add a delete operation
+
+### Subscriptions
+
+- `subscribe(event, callback): () => void` - Subscribe to events, returns unsubscribe function
+
+### File Operations
+
+- `uploadFile(fileData, options?): Promise<FileUploadResult>` - Upload a file
+- `getFile(cid, options?): Promise<FileResult>` - Get a file by CID
+- `deleteFile(cid, options?): Promise<boolean>` - Delete a file
+
+### Connection Management
+
+- `closeConnection(connectionId): Promise<boolean>` - Close a specific connection
+
+### Indexes and Performance
+
+- `createIndex(collection, field, options?): Promise<boolean>` - Create an index
+- `getMetrics(): Metrics` - Get performance metrics
+- `resetMetrics(): void` - Reset performance metrics
+
+## Configuration
+
+```typescript
+import { config, initDB } from "@debros/network";
+
+// Configure (optional)
+config.env.fingerprint = "my-unique-app-id";
+config.env.port = 9000;
+config.ipfs.blockstorePath = "./custom-path/blockstore";
+config.orbitdb.directory = "./custom-path/orbitdb";
+
+// Initialize with configuration
+await initDB();
+```

examples/abstract-database.ts

@@ -0,0 +1,73 @@
+import { initDB, create, get, update, remove, list, query, uploadFile, getFile, deleteFile, stopDB, logger } from '../src';
+
+// Alternative import method
+// import debros from '../src';
+// const { db } = debros;
+
+async function databaseExample() {
+  try {
+    logger.info('Starting database example...');
+    
+    // Initialize the database service (abstracts away IPFS and OrbitDB)
+    await initDB();
+    logger.info('Database service initialized');
+    
+    // Create a new user document
+    const userId = 'user123';
+    const userData = {
+      username: 'johndoe',
+      walletAddress: '0x1234567890',
+      avatar: null
+    };
+    
+    const createResult = await create('users', userId, userData);
+    logger.info(`Created user with ID: ${createResult.id} and hash: ${createResult.hash}`);
+    
+    // Retrieve the user
+    const user = await get('users', userId);
+    logger.info('Retrieved user:', user);
+    
+    // Update the user
+    const updateResult = await update('users', userId, {
+      avatar: 'profile.jpg',
+      bio: 'Software developer'
+    });
+    logger.info(`Updated user with hash: ${updateResult.hash}`);
+    
+    // Query users
+    const filteredUsers = await query('users', (user) => user.username === 'johndoe');
+    logger.info(`Found ${filteredUsers.length} matching users`);
+    
+    // List all users
+    const allUsers = await list('users', { limit: 10 });
+    logger.info(`Retrieved ${allUsers.length} users`);
+    
+    // Upload a file
+    const fileData = Buffer.from('This is a test file content');
+    const fileUpload = await uploadFile(fileData, { filename: 'test.txt' });
+    logger.info(`Uploaded file with CID: ${fileUpload.cid}`);
+    
+    // Retrieve the file
+    const file = await getFile(fileUpload.cid);
+    logger.info('Retrieved file:', {
+      content: file.data.toString(),
+      metadata: file.metadata
+    });
+    
+    // Delete the file
+    await deleteFile(fileUpload.cid);
+    logger.info('File deleted');
+    
+    // Delete the user
+    await remove('users', userId);
+    logger.info('User deleted');
+    
+    // Stop the database service
+    await stopDB();
+    logger.info('Database service stopped');
+  } catch (error) {
+    logger.error('Error in database example:', error);
+  }
+}
+
+databaseExample();

examples/advanced-database.ts

@@ -0,0 +1,266 @@
+import { 
+  initDB, 
+  create, 
+  get, 
+  update, 
+  remove,
+  list, 
+  query, 
+  uploadFile, 
+  getFile, 
+  createTransaction,
+  commitTransaction,
+  subscribe, 
+  defineSchema, 
+  getMetrics, 
+  createIndex,
+  ErrorCode,
+  StoreType,
+  logger 
+} from '../src';
+
+// Define a user schema
+const userSchema = {
+  properties: {
+    username: {
+      type: 'string',
+      required: true,
+      min: 3,
+      max: 20,
+    },
+    email: {
+      type: 'string',
+      pattern: '^[\\w-\\.]+@([\\w-]+\\.)+[\\w-]{2,4}$',
+    },
+    age: {
+      type: 'number',
+      min: 18,
+      max: 120,
+    },
+    roles: {
+      type: 'array',
+      items: {
+        type: 'string',
+      },
+    },
+    isActive: {
+      type: 'boolean',
+    },
+  },
+  required: ['username'],
+};
+
+async function advancedDatabaseExample() {
+  try {
+    logger.info('Starting advanced database example...');
+    
+    // Initialize the database service with a specific connection ID
+    const connectionId = await initDB('example-connection');
+    logger.info(`Database service initialized with connection ID: ${connectionId}`);
+    
+    // Define schema for validation
+    defineSchema('users', userSchema);
+    logger.info('User schema defined');
+    
+    // Create index for faster queries (works with docstore)
+    await createIndex('users', 'username', { storeType: StoreType.DOCSTORE });
+    logger.info('Created index on username field');
+    
+    // Set up subscription for real-time updates
+    const unsubscribe = subscribe('document:created', (data) => {
+      logger.info('Document created:', data.collection, data.id);
+    });
+    
+    // Create multiple users using a transaction
+    const transaction = createTransaction(connectionId);
+    
+    transaction
+      .create('users', 'user1', {
+        username: 'alice',
+        email: 'alice@example.com',
+        age: 28,
+        roles: ['admin', 'user'],
+        isActive: true,
+      })
+      .create('users', 'user2', {
+        username: 'bob',
+        email: 'bob@example.com',
+        age: 34,
+        roles: ['user'],
+        isActive: true,
+      })
+      .create('users', 'user3', {
+        username: 'charlie',
+        email: 'charlie@example.com',
+        age: 45,
+        roles: ['moderator', 'user'],
+        isActive: false,
+      });
+    
+    const txResult = await commitTransaction(transaction);
+    logger.info(`Transaction committed with ${txResult.results.length} operations`);
+    
+    // Get a specific user with type safety
+    interface User {
+      username: string;
+      email: string;
+      age: number;
+      roles: string[];
+      isActive: boolean;
+      createdAt: number;
+      updatedAt: number;
+    }
+    
+    // Using KeyValue store (default)
+    const user = await get<User>('users', 'user1');
+    logger.info('Retrieved user from KeyValue store:', user?.username, user?.email);
+    
+    // Using DocStore
+    await create<User>(
+      'users_docstore',
+      'user1',
+      {
+        username: 'alice_doc',
+        email: 'alice_doc@example.com',
+        age: 28,
+        roles: ['admin', 'user'],
+        isActive: true,
+      },
+      { storeType: StoreType.DOCSTORE }
+    );
+    
+    const docStoreUser = await get<User>('users_docstore', 'user1', { storeType: StoreType.DOCSTORE });
+    logger.info('Retrieved user from DocStore:', docStoreUser?.username, docStoreUser?.email);
+    
+    // Using Feed/EventLog store
+    await create<User>(
+      'users_feed',
+      'user1',
+      {
+        username: 'alice_feed',
+        email: 'alice_feed@example.com',
+        age: 28,
+        roles: ['admin', 'user'],
+        isActive: true,
+      },
+      { storeType: StoreType.FEED }
+    );
+    
+    // Update the feed entry (creates a new entry with the same ID)
+    await update<User>(
+      'users_feed',
+      'user1',
+      {
+        roles: ['admin', 'user', 'tester'],
+      },
+      { storeType: StoreType.FEED }
+    );
+    
+    // List all entries in the feed
+    const feedUsers = await list<User>('users_feed', { storeType: StoreType.FEED });
+    logger.info(`Found ${feedUsers.total} feed entries:`);
+    feedUsers.documents.forEach(user => {
+      logger.info(`- ${user.username} (${user.email})`);
+    });
+    
+    // Using Counter store
+    await create(
+      'counters', 
+      'visitors', 
+      { value: 100 }, 
+      { storeType: StoreType.COUNTER }
+    );
+    
+    // Increment the counter
+    await update(
+      'counters',
+      'visitors',
+      { increment: 5 },
+      { storeType: StoreType.COUNTER }
+    );
+    
+    // Get the counter value
+    const counter = await get('counters', 'visitors', { storeType: StoreType.COUNTER });
+    logger.info(`Counter value: ${counter?.value}`);
+    
+    // Update a user in KeyValue store
+    await update<User>('users', 'user1', {
+      roles: ['admin', 'user', 'tester'],
+    });
+    
+    // Query users from KeyValue store
+    const result = await query<User>(
+      'users',
+      (user) => user.isActive === true,
+      {
+        limit: 10,
+        offset: 0,
+        sort: { field: 'username', order: 'asc' },
+      }
+    );
+    
+    logger.info(`Found ${result.total} active users:`);
+    result.documents.forEach(user => {
+      logger.info(`- ${user.username} (${user.email})`);
+    });
+    
+    // List all users from KeyValue store with pagination
+    const allUsers = await list<User>('users', {
+      limit: 10,
+      offset: 0,
+      sort: { field: 'age', order: 'desc' },
+    });
+    
+    logger.info(`Listed ${allUsers.total} users sorted by age (desc):`);
+    allUsers.documents.forEach(user => {
+      logger.info(`- ${user.username}: ${user.age} years old`);
+    });
+    
+    // Upload a file with metadata
+    const fileData = Buffer.from('This is a test file with advanced features.');
+    const fileUpload = await uploadFile(fileData, { 
+      filename: 'advanced-test.txt',
+      metadata: {
+        contentType: 'text/plain',
+        tags: ['example', 'test'],
+        owner: 'user1',
+      }
+    });
+    
+    logger.info(`Uploaded file with CID: ${fileUpload.cid}`);
+    
+    // Retrieve the file
+    const file = await getFile(fileUpload.cid);
+    logger.info('Retrieved file content:', file.data.toString());
+    logger.info('File metadata:', file.metadata);
+    
+    // Get performance metrics
+    const metrics = getMetrics();
+    logger.info('Database metrics:', {
+      operations: metrics.operations,
+      performance: {
+        averageOperationTime: `${metrics.performance.averageOperationTime?.toFixed(2)}ms`,
+      },
+      cache: metrics.cacheStats,
+    });
+    
+    // Unsubscribe from events
+    unsubscribe();
+    logger.info('Unsubscribed from events');
+    
+    // Delete a user
+    await remove('users', 'user3');
+    logger.info('Deleted user user3');
+    
+    return true;
+  } catch (error) {
+    if (error && typeof error === 'object' && 'code' in error) {
+      logger.error(`Database error (${error.code}):`, error.message);
+    } else {
+      logger.error('Error in advanced database example:', error);
+    }
+    return false;
+  }
+}
+
+advancedDatabaseExample();

examples/basic-node.ts

@@ -1,4 +1,6 @@
-import { initIpfs, initOrbitDB, logger, createServiceLogger } from '../src/index';
+import { init as initIpfs, stop as stopIpfs } from '../src/ipfs/ipfsService';
+import { init as initOrbitDB } from '../src/orbit/orbitDBService';
+import { createServiceLogger } from '../src/utils/logger';
 
 const appLogger = createServiceLogger('APP');
 
@@ -11,11 +13,7 @@ async function startNode() {
     appLogger.info('IPFS node initialized');
 
     // Initialize OrbitDB
-    const ipfsService = {
-      getHelia: () => ipfs,
-    };
-
-    const orbitdb = await initOrbitDB(ipfsService);
+    const orbitdb = await initOrbitDB();
     appLogger.info('OrbitDB initialized');
 
     // Create a test database
@@ -40,7 +38,7 @@ async function startNode() {
     process.on('SIGINT', async () => {
       appLogger.info('Shutting down...');
       await orbitdb.stop();
-      await initIpfs.stop();
+      await stopIpfs();
       process.exit(0);
     });
   } catch (error) {

examples/integration-with-app.ts

@@ -1,126 +0,0 @@
-// Example of how to integrate the new @debros/node-core package into an application
-
-import express from 'express';
-import { initIpfs, initOrbitDB, createServiceLogger, getConnectedPeers } from '@debros/node-core'; // This would be the import path when installed from npm
-
-// Create service-specific loggers
-const apiLogger = createServiceLogger('API');
-const networkLogger = createServiceLogger('NETWORK');
-
-// Initialize Express app
-const app = express();
-app.use(express.json());
-
-// Network state
-let ipfsNode: any;
-let orbitInstance: any;
-let messageDB: any;
-
-// Initialize network components
-async function initializeNetwork() {
-  try {
-    // Initialize IPFS
-    networkLogger.info('Initializing IPFS node...');
-    ipfsNode = await initIpfs();
-
-    // Initialize OrbitDB
-    networkLogger.info('Initializing OrbitDB...');
-    orbitInstance = await initOrbitDB({
-      getHelia: () => ipfsNode,
-    });
-
-    // Open message database
-    messageDB = await orbitInstance.open('messages', {
-      type: 'feed',
-    });
-
-    networkLogger.info('Network components initialized successfully');
-
-    // Log connected peers every minute
-    setInterval(() => {
-      const peers = getConnectedPeers();
-      networkLogger.info(`Connected to ${peers.size} peers`);
-    }, 60000);
-
-    return true;
-  } catch (error) {
-    networkLogger.error('Failed to initialize network:', error);
-    return false;
-  }
-}
-
-// API routes
-app.get('/api/peers', (req, res) => {
-  const peers = getConnectedPeers();
-  const peerList: any[] = [];
-
-  peers.forEach((data, peerId) => {
-    peerList.push({
-      id: peerId,
-      load: data.load,
-      address: data.publicAddress,
-      lastSeen: data.lastSeen,
-    });
-  });
-
-  res.json({ peers: peerList });
-});
-
-app.get('/api/messages', async (req, res) => {
-  try {
-    const messages = messageDB.iterator({ limit: 100 }).collect();
-    res.json({ messages });
-  } catch (error) {
-    apiLogger.error('Error fetching messages:', error);
-    res.status(500).json({ error: 'Failed to fetch messages' });
-  }
-});
-
-app.post('/api/messages', async (req, res) => {
-  try {
-    const { content } = req.body;
-    if (!content) {
-      return res.status(400).json({ error: 'Content is required' });
-    }
-
-    const entry = await messageDB.add({
-      content,
-      timestamp: Date.now(),
-    });
-
-    res.status(201).json({ id: entry });
-  } catch (error) {
-    apiLogger.error('Error creating message:', error);
-    res.status(500).json({ error: 'Failed to create message' });
-  }
-});
-
-// Start the application
-async function startApp() {
-  const networkInitialized = await initializeNetwork();
-
-  if (networkInitialized) {
-    const port = config.env.port;
-    app.listen(port, () => {
-      apiLogger.info(`Server listening on port ${port}`);
-    });
-  } else {
-    apiLogger.error('Cannot start application: Network initialization failed');
-    process.exit(1);
-  }
-}
-
-// Shutdown handler
-process.on('SIGINT', async () => {
-  networkLogger.info('Application shutting down...');
-  if (orbitInstance) {
-    await orbitInstance.stop();
-  }
-  if (ipfsNode) {
-    await initIpfs.stop();
-  }
-  process.exit(0);
-});
-
-// Start the application
-startApp();

orbitdb.d.ts

@@ -1,7 +1,7 @@
 // custom.d.ts
 declare module '@orbitdb/core' {
   // Import the types from @constl/orbit-db-types
-  import { OrbitDBTypes } from '@constl/orbit-db-types';
+  import { OrbitDBTypes } from '@orbitdb/core-types';
 
   // Assuming @orbitdb/core exports an interface or type you want to override
   // Replace 'OrbitDB' with the actual export name from @orbitdb/core you want to type

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@debros/network",
-  "version": "0.0.13-alpha",
+  "version": "0.0.22-alpha",
   "description": "Debros network core functionality for IPFS, libp2p and OrbitDB",
   "type": "module",
   "main": "dist/index.js",
@@ -11,12 +11,14 @@
     "types.d.ts"
   ],
   "scripts": {
-    "build": "tsc",
+    "build": "tsc && tsc-esm-fix --outDir=./dist/esm",
     "dev": "tsc -w",
     "clean": "rimraf dist",
     "prepublishOnly": "npm run clean && npm run build",
     "prepare": "husky",
-    "lint": "npx eslint src"
+    "lint": "npx eslint src",
+    "format": "prettier --write \"**/*.{ts,js,json,md}\"",
+    "lint:fix": "npx eslint src --fix"
   },
   "keywords": [
     "ipfs",
@@ -32,6 +34,7 @@
     "@chainsafe/libp2p-gossipsub": "^14.1.0",
     "@chainsafe/libp2p-noise": "^16.1.0",
     "@chainsafe/libp2p-yamux": "^7.0.1",
+    "@helia/unixfs": "^5.0.0",
     "@libp2p/bootstrap": "^11.0.32",
     "@libp2p/crypto": "^5.0.15",
     "@libp2p/identify": "^3.0.27",
@@ -47,6 +50,8 @@
     "express": "^5.1.0",
     "helia": "^5.3.0",
     "libp2p": "^2.8.2",
+    "multiformats": "^13.3.2",
+    "node-cache": "^5.1.2",
     "node-forge": "^1.3.1",
     "winston": "^3.17.0"
   },
@@ -54,16 +59,24 @@
     "typescript": ">=5.0.0"
   },
   "devDependencies": {
-    "@constl/orbit-db-types": "^2.0.6",
+    "@eslint/js": "^9.24.0",
     "@orbitdb/core-types": "^1.0.14",
     "@types/express": "^5.0.1",
     "@types/node": "^22.13.10",
     "@types/node-forge": "^1.3.11",
+    "@typescript-eslint/eslint-plugin": "^8.29.0",
+    "@typescript-eslint/parser": "^8.29.0",
+    "eslint": "^9.24.0",
+    "eslint-config-prettier": "^10.1.1",
+    "eslint-plugin-prettier": "^5.2.6",
+    "globals": "^16.0.0",
     "husky": "^8.0.3",
     "lint-staged": "^15.5.0",
     "prettier": "^3.5.3",
     "rimraf": "^5.0.5",
-    "typescript": "^5.8.2"
+    "tsc-esm-fix": "^3.1.2",
+    "typescript": "^5.8.2",
+    "typescript-eslint": "^8.29.0"
   },
   "compilerOptions": {
     "typeRoots": [

src/db/cache/cacheService.ts

@@ -0,0 +1,62 @@
+import NodeCache from 'node-cache';
+import { createServiceLogger } from '../../utils/logger';
+
+const logger = createServiceLogger('DB_CACHE');
+
+// Cache for frequently accessed documents
+const cache = new NodeCache({
+  stdTTL: 300, // 5 minutes default TTL
+  checkperiod: 60, // Check for expired items every 60 seconds
+  useClones: false, // Don't clone objects (for performance)
+});
+
+// Cache statistics
+export const cacheStats = {
+  hits: 0,
+  misses: 0,
+};
+
+/**
+ * Get an item from cache
+ */
+export const get = <T>(key: string): T | undefined => {
+  const value = cache.get<T>(key);
+  if (value !== undefined) {
+    cacheStats.hits++;
+    return value;
+  }
+  cacheStats.misses++;
+  return undefined;
+};
+
+/**
+ * Set an item in cache
+ */
+export const set = <T>(key: string, value: T, ttl?: number): boolean => {
+  if (ttl === undefined) {
+    return cache.set(key, value);
+  }
+  return cache.set(key, value, ttl);
+};
+
+/**
+ * Delete an item from cache
+ */
+export const del = (key: string | string[]): number => {
+  return cache.del(key);
+};
+
+/**
+ * Flush the entire cache
+ */
+export const flushAll = (): void => {
+  cache.flushAll();
+};
+
+/**
+ * Reset cache statistics
+ */
+export const resetStats = (): void => {
+  cacheStats.hits = 0;
+  cacheStats.misses = 0;
+};

src/db/core/connection.ts

@@ -0,0 +1,138 @@
+import { createServiceLogger } from '../../utils/logger';
+import { init as initIpfs, stop as stopIpfs } from '../../ipfs/ipfsService';
+import { init as initOrbitDB } from '../../orbit/orbitDBService';
+import { DBConnection, ErrorCode } from '../types';
+import { DBError } from './error';
+
+const logger = createServiceLogger('DB_CONNECTION');
+
+// Connection pool of database instances
+const connections = new Map<string, DBConnection>();
+let defaultConnectionId: string | null = null;
+
+/**
+ * Initialize the database service
+ * This abstracts away OrbitDB and IPFS from the end user
+ */
+export const init = async (connectionId?: string): Promise<string> => {
+  try {
+    const connId = connectionId || `conn_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+    logger.info(`Initializing DB service with connection ID: ${connId}`);
+    
+    // Initialize IPFS
+    const ipfsInstance = await initIpfs();
+    
+    // Initialize OrbitDB
+    const orbitdbInstance = await initOrbitDB();
+    
+    // Store connection in pool
+    connections.set(connId, {
+      ipfs: ipfsInstance,
+      orbitdb: orbitdbInstance,
+      timestamp: Date.now(),
+      isActive: true,
+    });
+    
+    // Set as default if no default exists
+    if (!defaultConnectionId) {
+      defaultConnectionId = connId;
+    }
+    
+    logger.info(`DB service initialized successfully with connection ID: ${connId}`);
+    return connId;
+  } catch (error) {
+    logger.error('Failed to initialize DB service:', error);
+    throw new DBError(ErrorCode.INITIALIZATION_FAILED, 'Failed to initialize database service', error);
+  }
+};
+
+/**
+ * Get the active connection
+ */
+export const getConnection = (connectionId?: string): DBConnection => {
+  const connId = connectionId || defaultConnectionId;
+  
+  if (!connId || !connections.has(connId)) {
+    throw new DBError(
+      ErrorCode.NOT_INITIALIZED, 
+      `No active database connection found${connectionId ? ` for ID: ${connectionId}` : ''}`
+    );
+  }
+  
+  const connection = connections.get(connId)!;
+  
+  if (!connection.isActive) {
+    throw new DBError(
+      ErrorCode.CONNECTION_ERROR, 
+      `Connection ${connId} is no longer active`
+    );
+  }
+  
+  return connection;
+};
+
+/**
+ * Close a specific database connection
+ */
+export const closeConnection = async (connectionId: string): Promise<boolean> => {
+  if (!connections.has(connectionId)) {
+    return false;
+  }
+  
+  try {
+    const connection = connections.get(connectionId)!;
+    
+    // Stop OrbitDB
+    if (connection.orbitdb) {
+      await connection.orbitdb.stop();
+    }
+    
+    // Mark connection as inactive
+    connection.isActive = false;
+    
+    // If this was the default connection, clear it
+    if (defaultConnectionId === connectionId) {
+      defaultConnectionId = null;
+      
+      // Try to find another active connection to be the default
+      for (const [id, conn] of connections.entries()) {
+        if (conn.isActive) {
+          defaultConnectionId = id;
+          break;
+        }
+      }
+    }
+    
+    logger.info(`Closed database connection: ${connectionId}`);
+    return true;
+  } catch (error) {
+    logger.error(`Error closing connection ${connectionId}:`, error);
+    return false;
+  }
+};
+
+/**
+ * Stop all database connections
+ */
+export const stop = async (): Promise<void> => {
+  try {
+    // Close all connections
+    for (const [id, connection] of connections.entries()) {
+      if (connection.isActive) {
+        await closeConnection(id);
+      }
+    }
+    
+    // Stop IPFS if needed
+    const ipfs = connections.get(defaultConnectionId || '')?.ipfs;
+    if (ipfs) {
+      await stopIpfs();
+    }
+    
+    defaultConnectionId = null;
+    logger.info('All DB connections stopped successfully');
+  } catch (error) {
+    logger.error('Error stopping DB connections:', error);
+    throw error;
+  }
+};

src/db/core/error.ts

@@ -0,0 +1,18 @@
+import { ErrorCode } from '../types';
+
+// Re-export error code for easier access
+export { ErrorCode };
+
+
+// Custom error class with error codes
+export class DBError extends Error {
+  code: ErrorCode;
+  details?: any;
+
+  constructor(code: ErrorCode, message: string, details?: any) {
+    super(message);
+    this.name = 'DBError';
+    this.code = code;
+    this.details = details;
+  }
+}

src/db/dbService.ts

@@ -0,0 +1,212 @@
+import { createServiceLogger } from '../utils/logger';
+import { init, getConnection, closeConnection, stop } from './core/connection';
+import { defineSchema, validateDocument } from './schema/validator';
+import * as cache from './cache/cacheService';
+import * as events from './events/eventService';
+import { getMetrics, resetMetrics } from './metrics/metricsService';
+import { Transaction } from './transactions/transactionService';
+import { StoreType, CreateResult, UpdateResult, PaginatedResult, QueryOptions, ListOptions, ErrorCode } from './types';
+import { DBError } from './core/error';
+import { getStore } from './stores/storeFactory';
+import { uploadFile, getFile, deleteFile } from './stores/fileStore';
+
+// Re-export imported functions
+export { init, closeConnection, stop, defineSchema, getMetrics, resetMetrics, uploadFile, getFile, deleteFile };
+
+const logger = createServiceLogger('DB_SERVICE');
+
+/**
+ * Create a new transaction for batching operations
+ */
+export const createTransaction = (connectionId?: string): Transaction => {
+  return new Transaction(connectionId);
+};
+
+/**
+ * Execute all operations in a transaction
+ */
+export const commitTransaction = async (transaction: Transaction): Promise<{ success: boolean; results: any[] }> => {
+  try {
+    // Validate that we have operations
+    const operations = transaction.getOperations();
+    if (operations.length === 0) {
+      return { success: true, results: [] };
+    }
+    
+    const connectionId = transaction.getConnectionId();
+    const results = [];
+    
+    // Execute all operations
+    for (const operation of operations) {
+      let result;
+      
+      switch (operation.type) {
+        case 'create':
+          result = await create(
+            operation.collection, 
+            operation.id, 
+            operation.data, 
+            { connectionId }
+          );
+          break;
+          
+        case 'update':
+          result = await update(
+            operation.collection, 
+            operation.id, 
+            operation.data, 
+            { connectionId }
+          );
+          break;
+          
+        case 'delete':
+          result = await remove(
+            operation.collection, 
+            operation.id, 
+            { connectionId }
+          );
+          break;
+      }
+      
+      results.push(result);
+    }
+    
+    return { success: true, results };
+  } catch (error) {
+    logger.error('Transaction failed:', error);
+    throw new DBError(ErrorCode.TRANSACTION_FAILED, 'Failed to commit transaction', error);
+  }
+};
+
+/**
+ * Create a new document in the specified collection using the appropriate store
+ */
+export const create = async <T extends Record<string, any>>(
+  collection: string, 
+  id: string, 
+  data: Omit<T, 'createdAt' | 'updatedAt'>, 
+  options?: { connectionId?: string, storeType?: StoreType }
+): Promise<CreateResult> => {
+  const storeType = options?.storeType || StoreType.KEYVALUE;
+  const store = getStore(storeType);
+  return store.create(collection, id, data, { connectionId: options?.connectionId });
+};
+
+/**
+ * Get a document by ID from a collection
+ */
+export const get = async <T extends Record<string, any>>(
+  collection: string, 
+  id: string, 
+  options?: { connectionId?: string; skipCache?: boolean, storeType?: StoreType }
+): Promise<T | null> => {
+  const storeType = options?.storeType || StoreType.KEYVALUE;
+  const store = getStore(storeType);
+  return store.get(collection, id, options);
+};
+
+/**
+ * Update a document in a collection
+ */
+export const update = async <T extends Record<string, any>>(
+  collection: string, 
+  id: string, 
+  data: Partial<Omit<T, 'createdAt' | 'updatedAt'>>, 
+  options?: { connectionId?: string; upsert?: boolean, storeType?: StoreType }
+): Promise<UpdateResult> => {
+  const storeType = options?.storeType || StoreType.KEYVALUE;
+  const store = getStore(storeType);
+  return store.update(collection, id, data, options);
+};
+
+/**
+ * Delete a document from a collection
+ */
+export const remove = async (
+  collection: string, 
+  id: string, 
+  options?: { connectionId?: string, storeType?: StoreType }
+): Promise<boolean> => {
+  const storeType = options?.storeType || StoreType.KEYVALUE;
+  const store = getStore(storeType);
+  return store.remove(collection, id, options);
+};
+
+/**
+ * List all documents in a collection with pagination
+ */
+export const list = async <T extends Record<string, any>>(
+  collection: string, 
+  options?: ListOptions & { storeType?: StoreType }
+): Promise<PaginatedResult<T>> => {
+  const storeType = options?.storeType || StoreType.KEYVALUE;
+  const store = getStore(storeType);
+  
+  // Remove storeType from options
+  const { storeType: _, ...storeOptions } = options || {};
+  return store.list(collection, storeOptions);
+};
+
+/**
+ * Query documents in a collection with filtering and pagination
+ */
+export const query = async <T extends Record<string, any>>(
+  collection: string, 
+  filter: (doc: T) => boolean,
+  options?: QueryOptions & { storeType?: StoreType }
+): Promise<PaginatedResult<T>> => {
+  const storeType = options?.storeType || StoreType.KEYVALUE;
+  const store = getStore(storeType);
+  
+  // Remove storeType from options
+  const { storeType: _, ...storeOptions } = options || {};
+  return store.query(collection, filter, storeOptions);
+};
+
+/**
+ * Create an index for a collection to speed up queries
+ */
+export const createIndex = async (
+  collection: string,
+  field: string,
+  options?: { connectionId?: string, storeType?: StoreType }
+): Promise<boolean> => {
+  const storeType = options?.storeType || StoreType.KEYVALUE;
+  const store = getStore(storeType);
+  return store.createIndex(collection, field, { connectionId: options?.connectionId });
+};
+
+/**
+ * Subscribe to database events
+ */
+export const subscribe = events.subscribe;
+
+// Re-export error types and codes
+export { DBError } from './core/error';
+export { ErrorCode } from './types';
+
+// Export store types
+export { StoreType } from './types';
+
+export default {
+  init,
+  create,
+  get,
+  update,
+  remove,
+  list,
+  query,
+  createIndex,
+  createTransaction,
+  commitTransaction,
+  subscribe,
+  uploadFile,
+  getFile,
+  deleteFile,
+  defineSchema,
+  getMetrics,
+  resetMetrics,
+  closeConnection,
+  stop,
+  StoreType
+};

src/db/events/eventService.ts

@@ -0,0 +1,36 @@
+import { dbEvents } from '../types';
+
+// Event types
+type DBEventType = 'document:created' | 'document:updated' | 'document:deleted';
+
+/**
+ * Subscribe to database events
+ */
+export const subscribe = (
+  event: DBEventType,
+  callback: (data: any) => void
+): () => void => {
+  dbEvents.on(event, callback);
+  
+  // Return unsubscribe function
+  return () => {
+    dbEvents.off(event, callback);
+  };
+};
+
+/**
+ * Emit an event
+ */
+export const emit = (
+  event: DBEventType,
+  data: any
+): void => {
+  dbEvents.emit(event, data);
+};
+
+/**
+ * Remove all event listeners
+ */
+export const removeAllListeners = (): void => {
+  dbEvents.removeAllListeners();
+};

src/db/metrics/metricsService.ts

@@ -0,0 +1,101 @@
+import { Metrics, ErrorCode } from '../types';
+import { DBError } from '../core/error';
+import * as cacheService from '../cache/cacheService';
+
+// Metrics tracking
+const metrics: Metrics = {
+  operations: {
+    creates: 0,
+    reads: 0,
+    updates: 0,
+    deletes: 0,
+    queries: 0,
+    fileUploads: 0,
+    fileDownloads: 0,
+  },
+  performance: {
+    totalOperationTime: 0,
+    operationCount: 0,
+  },
+  errors: {
+    count: 0,
+    byCode: {},
+  },
+  cacheStats: {
+    hits: 0,
+    misses: 0,
+  },
+  startTime: Date.now(),
+};
+
+/**
+ * Measure performance of a database operation
+ */
+export async function measurePerformance<T>(operation: () => Promise<T>): Promise<T> {
+  const startTime = performance.now();
+  try {
+    const result = await operation();
+    const endTime = performance.now();
+    metrics.performance.totalOperationTime += (endTime - startTime);
+    metrics.performance.operationCount++;
+    return result;
+  } catch (error) {
+    const endTime = performance.now();
+    metrics.performance.totalOperationTime += (endTime - startTime);
+    metrics.performance.operationCount++;
+    
+    // Track error metrics
+    metrics.errors.count++;
+    if (error instanceof DBError) {
+      metrics.errors.byCode[error.code] = (metrics.errors.byCode[error.code] || 0) + 1;
+    }
+    
+    throw error;
+  }
+}
+
+/**
+ * Get database metrics
+ */
+export const getMetrics = (): Metrics => {
+  return {
+    ...metrics,
+    // Sync cache stats
+    cacheStats: cacheService.cacheStats,
+    // Calculate some derived metrics
+    performance: {
+      ...metrics.performance,
+      averageOperationTime: metrics.performance.operationCount > 0 ?
+        metrics.performance.totalOperationTime / metrics.performance.operationCount :
+        0
+    }
+  };
+};
+
+/**
+ * Reset metrics (useful for testing)
+ */
+export const resetMetrics = (): void => {
+  metrics.operations = {
+    creates: 0,
+    reads: 0,
+    updates: 0,
+    deletes: 0,
+    queries: 0,
+    fileUploads: 0,
+    fileDownloads: 0,
+  };
+  metrics.performance = {
+    totalOperationTime: 0,
+    operationCount: 0,
+  };
+  metrics.errors = {
+    count: 0,
+    byCode: {},
+  };
+  
+  // Reset cache stats too
+  cacheService.resetStats();
+  
+  metrics.startTime = Date.now();
+};

src/db/schema/validator.ts

@@ -0,0 +1,225 @@
+import { createServiceLogger } from '../../utils/logger';
+import { CollectionSchema, ErrorCode } from '../types';
+import { DBError } from '../core/error';
+
+const logger = createServiceLogger('DB_SCHEMA');
+
+// Store collection schemas
+const schemas = new Map<string, CollectionSchema>();
+
+/**
+ * Define a schema for a collection
+ */
+export const defineSchema = (collection: string, schema: CollectionSchema): void => {
+  schemas.set(collection, schema);
+  logger.info(`Schema defined for collection: ${collection}`);
+};
+
+/**
+ * Validate a document against its schema
+ */
+export const validateDocument = (collection: string, document: any): boolean => {
+  const schema = schemas.get(collection);
+  
+  if (!schema) {
+    return true; // No schema defined, so validation passes
+  }
+  
+  // Check required fields
+  if (schema.required) {
+    for (const field of schema.required) {
+      if (document[field] === undefined) {
+        throw new DBError(
+          ErrorCode.INVALID_SCHEMA,
+          `Required field '${field}' is missing`,
+          { collection, document }
+        );
+      }
+    }
+  }
+  
+  // Validate properties
+  for (const [field, definition] of Object.entries(schema.properties)) {
+    const value = document[field];
+    
+    // Skip undefined optional fields
+    if (value === undefined) {
+      if (definition.required) {
+        throw new DBError(
+          ErrorCode.INVALID_SCHEMA,
+          `Required field '${field}' is missing`,
+          { collection, document }
+        );
+      }
+      continue;
+    }
+    
+    // Type validation
+    switch (definition.type) {
+      case 'string':
+        if (typeof value !== 'string') {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be a string`,
+            { collection, field, value }
+          );
+        }
+        
+        // Pattern validation
+        if (definition.pattern && !new RegExp(definition.pattern).test(value)) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' does not match pattern: ${definition.pattern}`,
+            { collection, field, value }
+          );
+        }
+        
+        // Length validation
+        if (definition.min !== undefined && value.length < definition.min) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must have at least ${definition.min} characters`,
+            { collection, field, value }
+          );
+        }
+        
+        if (definition.max !== undefined && value.length > definition.max) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must have at most ${definition.max} characters`,
+            { collection, field, value }
+          );
+        }
+        break;
+        
+      case 'number':
+        if (typeof value !== 'number') {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be a number`,
+            { collection, field, value }
+          );
+        }
+        
+        // Range validation
+        if (definition.min !== undefined && value < definition.min) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be at least ${definition.min}`,
+            { collection, field, value }
+          );
+        }
+        
+        if (definition.max !== undefined && value > definition.max) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be at most ${definition.max}`,
+            { collection, field, value }
+          );
+        }
+        break;
+        
+      case 'boolean':
+        if (typeof value !== 'boolean') {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be a boolean`,
+            { collection, field, value }
+          );
+        }
+        break;
+        
+      case 'array':
+        if (!Array.isArray(value)) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be an array`,
+            { collection, field, value }
+          );
+        }
+        
+        // Length validation
+        if (definition.min !== undefined && value.length < definition.min) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must have at least ${definition.min} items`,
+            { collection, field, value }
+          );
+        }
+        
+        if (definition.max !== undefined && value.length > definition.max) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must have at most ${definition.max} items`,
+            { collection, field, value }
+          );
+        }
+        
+        // Validate array items if item schema is defined
+        if (definition.items && value.length > 0) {
+          for (let i = 0; i < value.length; i++) {
+            const item = value[i];
+            
+            // This is a simplified item validation
+            // In a real implementation, this would recursively validate complex objects
+            switch (definition.items.type) {
+              case 'string':
+                if (typeof item !== 'string') {
+                  throw new DBError(
+                    ErrorCode.INVALID_SCHEMA,
+                    `Item at index ${i} in field '${field}' must be a string`,
+                    { collection, field, item }
+                  );
+                }
+                break;
+                
+              case 'number':
+                if (typeof item !== 'number') {
+                  throw new DBError(
+                    ErrorCode.INVALID_SCHEMA,
+                    `Item at index ${i} in field '${field}' must be a number`,
+                    { collection, field, item }
+                  );
+                }
+                break;
+                
+              case 'boolean':
+                if (typeof item !== 'boolean') {
+                  throw new DBError(
+                    ErrorCode.INVALID_SCHEMA,
+                    `Item at index ${i} in field '${field}' must be a boolean`,
+                    { collection, field, item }
+                  );
+                }
+                break;
+            }
+          }
+        }
+        break;
+        
+      case 'object':
+        if (typeof value !== 'object' || value === null || Array.isArray(value)) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be an object`,
+            { collection, field, value }
+          );
+        }
+        
+        // Nested object validation would go here in a real implementation
+        break;
+        
+      case 'enum':
+        if (definition.enum && !definition.enum.includes(value)) {
+          throw new DBError(
+            ErrorCode.INVALID_SCHEMA,
+            `Field '${field}' must be one of: ${definition.enum.join(', ')}`,
+            { collection, field, value }
+          );
+        }
+        break;
+    }
+  }
+  
+  return true;
+};

src/db/stores/baseStore.ts

@@ -0,0 +1,142 @@
+import { createServiceLogger } from '../../utils/logger';
+import { openDB } from '../../orbit/orbitDBService';
+import { getConnection } from '../core/connection';
+import { validateDocument } from '../schema/validator';
+import {
+  ErrorCode,
+  StoreType,
+  StoreOptions,
+  CreateResult,
+  UpdateResult,
+  PaginatedResult,
+  QueryOptions,
+  ListOptions,
+} from '../types';
+import { DBError } from '../core/error';
+
+const logger = createServiceLogger('DB_STORE');
+
+/**
+ * Base Store interface that all store implementations should extend
+ */
+export interface BaseStore {
+  /**
+   * Create a new document
+   */
+  create<T extends Record<string, any>>(
+    collection: string,
+    id: string,
+    data: Omit<T, 'createdAt' | 'updatedAt'>,
+    options?: StoreOptions,
+  ): Promise<CreateResult>;
+
+  /**
+   * Get a document by ID
+   */
+  get<T extends Record<string, any>>(
+    collection: string,
+    id: string,
+    options?: StoreOptions & { skipCache?: boolean },
+  ): Promise<T | null>;
+
+  /**
+   * Update a document
+   */
+  update<T extends Record<string, any>>(
+    collection: string,
+    id: string,
+    data: Partial<Omit<T, 'createdAt' | 'updatedAt'>>,
+    options?: StoreOptions & { upsert?: boolean },
+  ): Promise<UpdateResult>;
+
+  /**
+   * Delete a document
+   */
+  remove(collection: string, id: string, options?: StoreOptions): Promise<boolean>;
+
+  /**
+   * List all documents in a collection with pagination
+   */
+  list<T extends Record<string, any>>(
+    collection: string,
+    options?: ListOptions,
+  ): Promise<PaginatedResult<T>>;
+
+  /**
+   * Query documents in a collection with filtering and pagination
+   */
+  query<T extends Record<string, any>>(
+    collection: string,
+    filter: (doc: T) => boolean,
+    options?: QueryOptions,
+  ): Promise<PaginatedResult<T>>;
+
+  /**
+   * Create an index for a collection to speed up queries
+   */
+  createIndex(collection: string, field: string, options?: StoreOptions): Promise<boolean>;
+}
+
+/**
+ * Open a store of the specified type
+ */
+export async function openStore(
+  collection: string,
+  storeType: StoreType,
+  options?: StoreOptions,
+): Promise<any> {
+  try {
+    const connection = getConnection(options?.connectionId);
+    logger.info(`Connection for ${collection}:`, connection);
+    return await openDB(collection, storeType).catch((err) => {
+      throw new Error(`OrbitDB openDB failed: ${err.message}`);
+    });
+  } catch (error) {
+    logger.error(`Error opening ${storeType} store for collection ${collection}:`, error);
+    throw new DBError(
+      ErrorCode.OPERATION_FAILED,
+      `Failed to open ${storeType} store for collection ${collection}`,
+      error,
+    );
+  }
+}
+
+/**
+ * Helper function to prepare a document for storage
+ */
+export function prepareDocument<T extends Record<string, any>>(
+  collection: string,
+  data: Omit<T, 'createdAt' | 'updatedAt'>,
+  existingDoc?: T | null,
+): T {
+  const timestamp = Date.now();
+
+  // Sanitize the input data by replacing undefined with null
+  const sanitizedData = Object.fromEntries(
+    Object.entries(data).map(([key, value]) => [key, value === undefined ? null : value]),
+  ) as Omit<T, 'createdAt' | 'updatedAt'>;
+
+  // If it's an update to an existing document
+  if (existingDoc) {
+    const doc = {
+      ...existingDoc,
+      ...sanitizedData,
+      updatedAt: timestamp,
+    } as T;
+
+    // Validate the document against its schema
+    validateDocument(collection, doc);
+    return doc;
+  }
+
+  // Otherwise it's a new document
+  const doc = {
+    ...sanitizedData,
+    createdAt: timestamp,
+    updatedAt: timestamp,
+  } as unknown as T;
+
+  // Validate the document against its schema
+  validateDocument(collection, doc);
+  return doc;
+}

src/db/stores/counterStore.ts

@@ -0,0 +1,331 @@
+import { createServiceLogger } from '../../utils/logger';
+import { ErrorCode, StoreType, StoreOptions, CreateResult, UpdateResult, PaginatedResult, QueryOptions, ListOptions } from '../types';
+import { DBError } from '../core/error';
+import { BaseStore, openStore } from './baseStore';
+import * as cache from '../cache/cacheService';
+import * as events from '../events/eventService';
+import { measurePerformance } from '../metrics/metricsService';
+
+const logger = createServiceLogger('COUNTER_STORE');
+
+/**
+ * CounterStore implementation
+ * Uses OrbitDB's counter store for simple numeric counters
+ */
+export class CounterStore implements BaseStore {
+  /**
+   * Create or set counter value
+   */
+  async create<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Omit<T, 'createdAt' | 'updatedAt'>, 
+    options?: StoreOptions
+  ): Promise<CreateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.COUNTER, options);
+        
+        // Extract value from data, default to 0
+        const value = typeof data === 'object' && data !== null && 'value' in data ? 
+          Number(data.value) : 0;
+        
+        // Set the counter value
+        const hash = await db.set(value);
+        
+        // Construct document representation
+        const document = {
+          id,
+          value,
+          createdAt: Date.now(),
+          updatedAt: Date.now()
+        };
+        
+        // Add to cache
+        const cacheKey = `${collection}:${id}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:created', { collection, id, document });
+        
+        logger.info(`Set counter in ${collection} to ${value}`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error setting counter in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to set counter in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Get counter value
+   */
+  async get<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    options?: StoreOptions & { skipCache?: boolean }
+  ): Promise<T | null> {
+    return measurePerformance(async () => {
+      try {
+        // Note: for counters, id is not used in the underlying store (there's only one counter per db)
+        // but we use it for consistency with the API
+        
+        // Check cache first if not skipped
+        const cacheKey = `${collection}:${id}`;
+        if (!options?.skipCache) {
+          const cachedDocument = cache.get<T>(cacheKey);
+          if (cachedDocument) {
+            return cachedDocument;
+          }
+        }
+        
+        const db = await openStore(collection, StoreType.COUNTER, options);
+        
+        // Get the counter value
+        const value = await db.value();
+        
+        // Construct document representation
+        const document = {
+          id,
+          value,
+          updatedAt: Date.now()
+        } as unknown as T;
+        
+        // Update cache
+        cache.set(cacheKey, document);
+        
+        return document;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error getting counter from ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to get counter from ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Update counter (increment/decrement)
+   */
+  async update<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Partial<Omit<T, 'createdAt' | 'updatedAt'>>, 
+    options?: StoreOptions & { upsert?: boolean }
+  ): Promise<UpdateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.COUNTER, options);
+        
+        // Get current value before update
+        const currentValue = await db.value();
+        
+        // Extract value from data
+        let value: number;
+        let operation: 'increment' | 'decrement' | 'set' = 'set';
+        
+        // Check what kind of operation we're doing
+        if (typeof data === 'object' && data !== null) {
+          if ('increment' in data) {
+            value = Number(data.increment);
+            operation = 'increment';
+          } else if ('decrement' in data) {
+            value = Number(data.decrement);
+            operation = 'decrement';
+          } else if ('value' in data) {
+            value = Number(data.value);
+            operation = 'set';
+          } else {
+            value = 0;
+            operation = 'set';
+          }
+        } else {
+          value = 0;
+          operation = 'set';
+        }
+        
+        // Update the counter
+        let hash;
+        let newValue;
+        
+        switch (operation) {
+          case 'increment':
+            hash = await db.inc(value);
+            newValue = currentValue + value;
+            break;
+          case 'decrement':
+            hash = await db.inc(-value); // Counter store uses inc with negative value
+            newValue = currentValue - value;
+            break;
+          case 'set':
+            hash = await db.set(value);
+            newValue = value;
+            break;
+        }
+        
+        // Construct document representation
+        const document = {
+          id,
+          value: newValue,
+          updatedAt: Date.now()
+        };
+        
+        // Update cache
+        const cacheKey = `${collection}:${id}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:updated', { 
+          collection, 
+          id, 
+          document, 
+          previous: { id, value: currentValue } 
+        });
+        
+        logger.info(`Updated counter in ${collection} from ${currentValue} to ${newValue}`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error updating counter in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to update counter in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Delete/reset counter
+   */
+  async remove(
+    collection: string, 
+    id: string, 
+    options?: StoreOptions
+  ): Promise<boolean> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.COUNTER, options);
+        
+        // Get the current value for the event
+        const currentValue = await db.value();
+        
+        // Reset the counter to 0 (counters can't be truly deleted)
+        await db.set(0);
+        
+        // Remove from cache
+        const cacheKey = `${collection}:${id}`;
+        cache.del(cacheKey);
+        
+        // Emit change event
+        events.emit('document:deleted', { 
+          collection, 
+          id, 
+          document: { id, value: currentValue } 
+        });
+        
+        logger.info(`Reset counter in ${collection} from ${currentValue} to 0`);
+        return true;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error resetting counter in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to reset counter in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * List all counters (for counter stores, there's only one counter per db)
+   */
+  async list<T extends Record<string, any>>(
+    collection: string, 
+    options?: ListOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.COUNTER, options);
+        const value = await db.value();
+        
+        // For counter stores, we just return one document with the counter value
+        const document = {
+          id: '0',  // Default ID since counters don't have IDs
+          value,
+          updatedAt: Date.now()
+        } as unknown as T;
+        
+        return {
+          documents: [document],
+          total: 1,
+          hasMore: false
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error listing counter in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to list counter in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Query is not applicable for counter stores, but we implement for API consistency
+   */
+  async query<T extends Record<string, any>>(
+    collection: string, 
+    filter: (doc: T) => boolean,
+    options?: QueryOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.COUNTER, options);
+        const value = await db.value();
+        
+        // Create document
+        const document = {
+          id: '0',  // Default ID since counters don't have IDs
+          value,
+          updatedAt: Date.now()
+        } as unknown as T;
+        
+        // Apply filter
+        const documents = filter(document) ? [document] : [];
+        
+        return {
+          documents,
+          total: documents.length,
+          hasMore: false
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error querying counter in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to query counter in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Create an index - not applicable for counter stores
+   */
+  async createIndex(
+    collection: string,
+    field: string,
+    options?: StoreOptions
+  ): Promise<boolean> {
+    logger.warn(`Index creation not supported for counter collections, ignoring request for ${collection}`);
+    return false;
+  }
+}

src/db/stores/docStore.ts

@@ -0,0 +1,350 @@
+import { createServiceLogger } from '../../utils/logger';
+import { ErrorCode, StoreType, StoreOptions, CreateResult, UpdateResult, PaginatedResult, QueryOptions, ListOptions } from '../types';
+import { DBError } from '../core/error';
+import { BaseStore, openStore, prepareDocument } from './baseStore';
+import * as cache from '../cache/cacheService';
+import * as events from '../events/eventService';
+import { measurePerformance } from '../metrics/metricsService';
+
+const logger = createServiceLogger('DOCSTORE');
+
+/**
+ * DocStore implementation
+ * Uses OrbitDB's document store which allows for more complex document storage with indices
+ */
+export class DocStore implements BaseStore {
+  /**
+   * Create a new document in the specified collection
+   */
+  async create<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Omit<T, 'createdAt' | 'updatedAt'>, 
+    options?: StoreOptions
+  ): Promise<CreateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.DOCSTORE, options);
+        
+        // Prepare document for storage (including _id which is required for docstore)
+        const document = {
+          _id: id,
+          ...prepareDocument<T>(collection, data)
+        };
+        
+        // Add to database
+        const hash = await db.put(document);
+        
+        // Add to cache
+        const cacheKey = `${collection}:${id}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:created', { collection, id, document });
+        
+        logger.info(`Created document in ${collection} with id ${id}`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error creating document in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to create document in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Get a document by ID from a collection
+   */
+  async get<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    options?: StoreOptions & { skipCache?: boolean }
+  ): Promise<T | null> {
+    return measurePerformance(async () => {
+      try {
+        // Check cache first if not skipped
+        const cacheKey = `${collection}:${id}`;
+        if (!options?.skipCache) {
+          const cachedDocument = cache.get<T>(cacheKey);
+          if (cachedDocument) {
+            return cachedDocument;
+          }
+        }
+        
+        const db = await openStore(collection, StoreType.DOCSTORE, options);
+        const document = await db.get(id) as T | null;
+        
+        // Update cache if document exists
+        if (document) {
+          cache.set(cacheKey, document);
+        }
+        
+        return document;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error getting document ${id} from ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to get document ${id} from ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Update a document in a collection
+   */
+  async update<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Partial<Omit<T, 'createdAt' | 'updatedAt'>>, 
+    options?: StoreOptions & { upsert?: boolean }
+  ): Promise<UpdateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.DOCSTORE, options);
+        const existing = await db.get(id) as T | null;
+        
+        if (!existing && !options?.upsert) {
+          throw new DBError(
+            ErrorCode.DOCUMENT_NOT_FOUND,
+            `Document ${id} not found in ${collection}`,
+            { collection, id }
+          );
+        }
+        
+        // Prepare document for update
+        const document = {
+          _id: id,
+          ...prepareDocument<T>(collection, data as unknown as Omit<T, "createdAt" | "updatedAt">, existing || undefined)
+        };
+        
+        // Update in database
+        const hash = await db.put(document);
+        
+        // Update cache
+        const cacheKey = `${collection}:${id}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:updated', { collection, id, document, previous: existing });
+        
+        logger.info(`Updated document in ${collection} with id ${id}`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error updating document in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to update document in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Delete a document from a collection
+   */
+  async remove(
+    collection: string, 
+    id: string, 
+    options?: StoreOptions
+  ): Promise<boolean> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.DOCSTORE, options);
+        
+        // Get the document before deleting for the event
+        const document = await db.get(id);
+        
+        // Delete from database
+        await db.del(id);
+        
+        // Remove from cache
+        const cacheKey = `${collection}:${id}`;
+        cache.del(cacheKey);
+        
+        // Emit change event
+        events.emit('document:deleted', { collection, id, document });
+        
+        logger.info(`Deleted document in ${collection} with id ${id}`);
+        return true;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error deleting document in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to delete document in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * List all documents in a collection with pagination
+   */
+  async list<T extends Record<string, any>>(
+    collection: string, 
+    options?: ListOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.DOCSTORE, options);
+        const allDocs = await db.query((doc: any) => true);
+        
+        let documents = allDocs.map((doc: any) => ({
+          id: doc._id,
+          ...doc
+        })) as T[];
+        
+        // Sort if requested
+        if (options?.sort) {
+          const { field, order } = options.sort;
+          documents.sort((a, b) => {
+            const valueA = a[field];
+            const valueB = b[field];
+            
+            // Handle different data types for sorting
+            if (typeof valueA === 'string' && typeof valueB === 'string') {
+              return order === 'asc' ? valueA.localeCompare(valueB) : valueB.localeCompare(valueA);
+            } else if (typeof valueA === 'number' && typeof valueB === 'number') {
+              return order === 'asc' ? valueA - valueB : valueB - valueA;
+            } else if (valueA instanceof Date && valueB instanceof Date) {
+              return order === 'asc' ? valueA.getTime() - valueB.getTime() : valueB.getTime() - valueA.getTime();
+            }
+            
+            // Default comparison for other types
+            return order === 'asc' ? 
+              String(valueA).localeCompare(String(valueB)) : 
+              String(valueB).localeCompare(String(valueA));
+          });
+        }
+        
+        const total = documents.length;
+        
+        // Apply pagination
+        const offset = options?.offset || 0;
+        const limit = options?.limit || total;
+        
+        const paginatedDocuments = documents.slice(offset, offset + limit);
+        const hasMore = offset + limit < total;
+        
+        return {
+          documents: paginatedDocuments,
+          total,
+          hasMore
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error listing documents in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to list documents in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Query documents in a collection with filtering and pagination
+   */
+  async query<T extends Record<string, any>>(
+    collection: string, 
+    filter: (doc: T) => boolean,
+    options?: QueryOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.DOCSTORE, options);
+        
+        // Apply filter using docstore's query capability
+        const filtered = await db.query((doc: any) => filter(doc as T));
+        
+        // Map the documents to include id
+        let documents = filtered.map((doc: any) => ({
+          id: doc._id,
+          ...doc
+        })) as T[];
+        
+        // Sort if requested
+        if (options?.sort) {
+          const { field, order } = options.sort;
+          documents.sort((a, b) => {
+            const valueA = a[field];
+            const valueB = b[field];
+            
+            // Handle different data types for sorting
+            if (typeof valueA === 'string' && typeof valueB === 'string') {
+              return order === 'asc' ? valueA.localeCompare(valueB) : valueB.localeCompare(valueA);
+            } else if (typeof valueA === 'number' && typeof valueB === 'number') {
+              return order === 'asc' ? valueA - valueB : valueB - valueA;
+            } else if (valueA instanceof Date && valueB instanceof Date) {
+              return order === 'asc' ? valueA.getTime() - valueB.getTime() : valueB.getTime() - valueA.getTime();
+            }
+            
+            // Default comparison for other types
+            return order === 'asc' ? 
+              String(valueA).localeCompare(String(valueB)) : 
+              String(valueB).localeCompare(String(valueA));
+          });
+        }
+        
+        const total = documents.length;
+        
+        // Apply pagination
+        const offset = options?.offset || 0;
+        const limit = options?.limit || total;
+        
+        const paginatedDocuments = documents.slice(offset, offset + limit);
+        const hasMore = offset + limit < total;
+        
+        return {
+          documents: paginatedDocuments,
+          total,
+          hasMore
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error querying documents in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to query documents in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Create an index for a collection to speed up queries
+   * DocStore has built-in indexing capabilities
+   */
+  async createIndex(
+    collection: string,
+    field: string,
+    options?: StoreOptions
+  ): Promise<boolean> {
+    try {
+      const db = await openStore(collection, StoreType.DOCSTORE, options);
+      
+      // DocStore supports indexing, so we create the index
+      if (typeof db.createIndex === 'function') {
+        await db.createIndex(field);
+        logger.info(`Index created on ${field} for collection ${collection}`);
+        return true;
+      }
+      
+      logger.info(`Index creation not supported for this DB instance, but DocStore has built-in indices`);
+      return true;
+    } catch (error) {
+      if (error instanceof DBError) {
+        throw error;
+      }
+      
+      logger.error(`Error creating index for ${collection}:`, error);
+      throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to create index for ${collection}`, error);
+    }
+  }
+}

src/db/stores/feedStore.ts

@@ -0,0 +1,416 @@
+import { createServiceLogger } from '../../utils/logger';
+import { ErrorCode, StoreType, StoreOptions, CreateResult, UpdateResult, PaginatedResult, QueryOptions, ListOptions } from '../types';
+import { DBError } from '../core/error';
+import { BaseStore, openStore, prepareDocument } from './baseStore';
+import * as cache from '../cache/cacheService';
+import * as events from '../events/eventService';
+import { measurePerformance } from '../metrics/metricsService';
+
+const logger = createServiceLogger('FEED_STORE');
+
+/**
+ * FeedStore/EventLog implementation
+ * Uses OrbitDB's feed/eventlog store which is an append-only log
+ */
+export class FeedStore implements BaseStore {
+  /**
+   * Create a new document in the specified collection
+   * For feeds, this appends a new entry
+   */
+  async create<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Omit<T, 'createdAt' | 'updatedAt'>, 
+    options?: StoreOptions
+  ): Promise<CreateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.FEED, options);
+        
+        // Prepare document for storage with ID
+        const document = {
+          id,
+          ...prepareDocument<T>(collection, data)
+        };
+        
+        // Add to database
+        const hash = await db.add(document);
+        
+        // Feed entries are append-only, so we use a different cache key pattern
+        const cacheKey = `${collection}:entry:${hash}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:created', { collection, id, document, hash });
+        
+        logger.info(`Created entry in feed ${collection} with id ${id} and hash ${hash}`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error creating entry in feed ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to create entry in feed ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Get a specific entry in a feed - note this works differently than other stores
+   * as feeds are append-only logs identified by hash
+   */
+  async get<T extends Record<string, any>>(
+    collection: string, 
+    hash: string, 
+    options?: StoreOptions & { skipCache?: boolean }
+  ): Promise<T | null> {
+    return measurePerformance(async () => {
+      try {
+        // Check cache first if not skipped
+        const cacheKey = `${collection}:entry:${hash}`;
+        if (!options?.skipCache) {
+          const cachedDocument = cache.get<T>(cacheKey);
+          if (cachedDocument) {
+            return cachedDocument;
+          }
+        }
+        
+        const db = await openStore(collection, StoreType.FEED, options);
+        
+        // Get the specific entry by hash
+        const entry = await db.get(hash);
+        if (!entry) {
+          return null;
+        }
+        
+        const document = entry.payload.value as T;
+        
+        // Update cache
+        cache.set(cacheKey, document);
+        
+        return document;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error getting entry ${hash} from feed ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to get entry ${hash} from feed ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Update an entry in a feed
+   * Note: Feeds are append-only, so we can't actually update existing entries
+   * Instead, we append a new entry with the updated data and link it to the original
+   */
+  async update<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Partial<Omit<T, 'createdAt' | 'updatedAt'>>, 
+    options?: StoreOptions & { upsert?: boolean }
+  ): Promise<UpdateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.FEED, options);
+        
+        // Find the latest entry with the given id
+        const entries = await db.iterator({ limit: -1 }).collect();
+        const existingEntryIndex = entries.findIndex((e: any) => {
+          const value = e.payload.value;
+          return value && value.id === id;
+        });
+        
+        if (existingEntryIndex === -1 && !options?.upsert) {
+          throw new DBError(
+            ErrorCode.DOCUMENT_NOT_FOUND,
+            `Entry with id ${id} not found in feed ${collection}`,
+            { collection, id }
+          );
+        }
+        
+        const existingEntry = existingEntryIndex !== -1 ? entries[existingEntryIndex].payload.value : null;
+        
+        // Prepare document with update
+        const document = {
+          id,
+          ...prepareDocument<T>(collection, data as unknown as Omit<T, "createdAt" | "updatedAt">, existingEntry),
+          // Add reference to the previous entry if it exists
+          previousEntryHash: existingEntryIndex !== -1 ? entries[existingEntryIndex].hash : undefined
+        };
+        
+        // Add to feed (append new entry)
+        const hash = await db.add(document);
+        
+        // Cache the new entry
+        const cacheKey = `${collection}:entry:${hash}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:updated', { collection, id, document, previous: existingEntry });
+        
+        logger.info(`Updated entry in feed ${collection} with id ${id} (new hash: ${hash})`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error updating entry in feed ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to update entry in feed ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Delete is not supported in feed/eventlog stores since they're append-only
+   * Instead, we add a "tombstone" entry that marks the entry as deleted
+   */
+  async remove(
+    collection: string, 
+    id: string, 
+    options?: StoreOptions
+  ): Promise<boolean> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.FEED, options);
+        
+        // Find the entry with the given id
+        const entries = await db.iterator({ limit: -1 }).collect();
+        const existingEntryIndex = entries.findIndex((e: any) => {
+          const value = e.payload.value;
+          return value && value.id === id;
+        });
+        
+        if (existingEntryIndex === -1) {
+          throw new DBError(
+            ErrorCode.DOCUMENT_NOT_FOUND,
+            `Entry with id ${id} not found in feed ${collection}`,
+            { collection, id }
+          );
+        }
+        
+        const existingEntry = entries[existingEntryIndex].payload.value;
+        const existingHash = entries[existingEntryIndex].hash;
+        
+        // Add a "tombstone" entry that marks this as deleted
+        const tombstone = {
+          id,
+          deleted: true,
+          deletedAt: Date.now(),
+          previousEntryHash: existingHash
+        };
+        
+        await db.add(tombstone);
+        
+        // Emit change event
+        events.emit('document:deleted', { collection, id, document: existingEntry });
+        
+        logger.info(`Marked entry as deleted in feed ${collection} with id ${id}`);
+        return true;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error marking entry as deleted in feed ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to mark entry as deleted in feed ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * List all entries in a feed with pagination
+   * Note: This will only return the latest entry for each unique ID
+   */
+  async list<T extends Record<string, any>>(
+    collection: string, 
+    options?: ListOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.FEED, options);
+        
+        // Get all entries
+        const entries = await db.iterator({ limit: -1 }).collect();
+        
+        // Group by ID and keep only the latest entry for each ID
+        // Also filter out tombstone entries
+        const latestEntries = new Map<string, any>();
+        for (const entry of entries) {
+          const value = entry.payload.value;
+          if (!value || value.deleted) continue;
+          
+          const id = value.id;
+          if (!id) continue;
+          
+          // If we already have an entry with this ID, check which is newer
+          if (latestEntries.has(id)) {
+            const existing = latestEntries.get(id);
+            if (value.updatedAt > existing.value.updatedAt) {
+              latestEntries.set(id, { hash: entry.hash, value });
+            }
+          } else {
+            latestEntries.set(id, { hash: entry.hash, value });
+          }
+        }
+        
+        // Convert to array of documents
+        let documents = Array.from(latestEntries.values()).map(entry => ({
+          ...entry.value
+        })) as T[];
+        
+        // Sort if requested
+        if (options?.sort) {
+          const { field, order } = options.sort;
+          documents.sort((a, b) => {
+            const valueA = a[field];
+            const valueB = b[field];
+            
+            // Handle different data types for sorting
+            if (typeof valueA === 'string' && typeof valueB === 'string') {
+              return order === 'asc' ? valueA.localeCompare(valueB) : valueB.localeCompare(valueA);
+            } else if (typeof valueA === 'number' && typeof valueB === 'number') {
+              return order === 'asc' ? valueA - valueB : valueB - valueA;
+            } else if (valueA instanceof Date && valueB instanceof Date) {
+              return order === 'asc' ? valueA.getTime() - valueB.getTime() : valueB.getTime() - valueA.getTime();
+            }
+            
+            // Default comparison for other types
+            return order === 'asc' ? 
+              String(valueA).localeCompare(String(valueB)) : 
+              String(valueB).localeCompare(String(valueA));
+          });
+        }
+        
+        const total = documents.length;
+        
+        // Apply pagination
+        const offset = options?.offset || 0;
+        const limit = options?.limit || total;
+        
+        const paginatedDocuments = documents.slice(offset, offset + limit);
+        const hasMore = offset + limit < total;
+        
+        return {
+          documents: paginatedDocuments,
+          total,
+          hasMore
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error listing entries in feed ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to list entries in feed ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Query entries in a feed with filtering and pagination
+   * Note: This queries the latest entry for each unique ID
+   */
+  async query<T extends Record<string, any>>(
+    collection: string, 
+    filter: (doc: T) => boolean,
+    options?: QueryOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.FEED, options);
+        
+        // Get all entries
+        const entries = await db.iterator({ limit: -1 }).collect();
+        
+        // Group by ID and keep only the latest entry for each ID
+        // Also filter out tombstone entries
+        const latestEntries = new Map<string, any>();
+        for (const entry of entries) {
+          const value = entry.payload.value;
+          if (!value || value.deleted) continue;
+          
+          const id = value.id;
+          if (!id) continue;
+          
+          // If we already have an entry with this ID, check which is newer
+          if (latestEntries.has(id)) {
+            const existing = latestEntries.get(id);
+            if (value.updatedAt > existing.value.updatedAt) {
+              latestEntries.set(id, { hash: entry.hash, value });
+            }
+          } else {
+            latestEntries.set(id, { hash: entry.hash, value });
+          }
+        }
+        
+        // Convert to array of documents and apply filter
+        let filtered = Array.from(latestEntries.values())
+          .filter(entry => filter(entry.value as T))
+          .map(entry => ({
+            ...entry.value
+          })) as T[];
+        
+        // Sort if requested
+        if (options?.sort) {
+          const { field, order } = options.sort;
+          filtered.sort((a, b) => {
+            const valueA = a[field];
+            const valueB = b[field];
+            
+            // Handle different data types for sorting
+            if (typeof valueA === 'string' && typeof valueB === 'string') {
+              return order === 'asc' ? valueA.localeCompare(valueB) : valueB.localeCompare(valueA);
+            } else if (typeof valueA === 'number' && typeof valueB === 'number') {
+              return order === 'asc' ? valueA - valueB : valueB - valueA;
+            } else if (valueA instanceof Date && valueB instanceof Date) {
+              return order === 'asc' ? valueA.getTime() - valueB.getTime() : valueB.getTime() - valueA.getTime();
+            }
+            
+            // Default comparison for other types
+            return order === 'asc' ? 
+              String(valueA).localeCompare(String(valueB)) : 
+              String(valueB).localeCompare(String(valueA));
+          });
+        }
+        
+        const total = filtered.length;
+        
+        // Apply pagination
+        const offset = options?.offset || 0;
+        const limit = options?.limit || total;
+        
+        const paginatedDocuments = filtered.slice(offset, offset + limit);
+        const hasMore = offset + limit < total;
+        
+        return {
+          documents: paginatedDocuments,
+          total,
+          hasMore
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error querying entries in feed ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to query entries in feed ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Create an index for a collection - not supported for feeds
+   */
+  async createIndex(
+    collection: string,
+    field: string,
+    options?: StoreOptions
+  ): Promise<boolean> {
+    logger.warn(`Index creation not supported for feed collections, ignoring request for ${collection}`);
+    return false;
+  }
+}

src/db/stores/fileStore.ts

@@ -0,0 +1,149 @@
+import { createServiceLogger } from '../../utils/logger';
+import { ErrorCode, StoreType, FileUploadResult, FileResult } from '../types';
+import { DBError } from '../core/error';
+import { getConnection } from '../core/connection';
+import { openStore } from './baseStore';
+import { getHelia } from '../../ipfs/ipfsService';
+import { measurePerformance } from '../metrics/metricsService';
+
+// Helper function to convert AsyncIterable to Buffer
+async function readAsyncIterableToBuffer(asyncIterable: AsyncIterable<Uint8Array>): Promise<Buffer> {
+  const chunks: Uint8Array[] = [];
+  for await (const chunk of asyncIterable) {
+    chunks.push(chunk);
+  }
+  return Buffer.concat(chunks);
+}
+
+const logger = createServiceLogger('FILE_STORE');
+
+/**
+ * Upload a file to IPFS
+ */
+export const uploadFile = async (
+  fileData: Buffer, 
+  options?: { 
+    filename?: string;
+    connectionId?: string;
+    metadata?: Record<string, any>;
+  }
+): Promise<FileUploadResult> => {
+  return measurePerformance(async () => {
+    try {
+      const connection = getConnection(options?.connectionId);
+      const ipfs = getHelia();
+      if (!ipfs) {
+        throw new DBError(ErrorCode.OPERATION_FAILED, 'IPFS instance not available');
+      }
+      
+      // Add to IPFS
+      const blockstore = ipfs.blockstore;
+      const unixfs = await import('@helia/unixfs');
+      const fs = unixfs.unixfs(ipfs);
+      const cid = await fs.addBytes(fileData);
+      const cidStr = cid.toString();
+      
+      // Store metadata
+      const filesDb = await openStore('_files', StoreType.KEYVALUE);
+      await filesDb.put(cidStr, {
+        filename: options?.filename,
+        size: fileData.length,
+        uploadedAt: Date.now(),
+        ...options?.metadata
+      });
+      
+      logger.info(`Uploaded file with CID: ${cidStr}`);
+      return { cid: cidStr };
+    } catch (error) {
+      if (error instanceof DBError) {
+        throw error;
+      }
+      
+      logger.error('Error uploading file:', error);
+      throw new DBError(ErrorCode.OPERATION_FAILED, 'Failed to upload file', error);
+    }
+  });
+};
+
+/**
+ * Get a file from IPFS by CID
+ */
+export const getFile = async (
+  cid: string,
+  options?: { connectionId?: string }
+): Promise<FileResult> => {
+  return measurePerformance(async () => {
+    try {
+      const connection = getConnection(options?.connectionId);
+      const ipfs = getHelia();
+      if (!ipfs) {
+        throw new DBError(ErrorCode.OPERATION_FAILED, 'IPFS instance not available');
+      }
+      
+      // Get from IPFS
+      const unixfs = await import('@helia/unixfs');
+      const fs = unixfs.unixfs(ipfs);
+      const { CID } = await import('multiformats/cid');
+      const resolvedCid = CID.parse(cid);
+      
+      try {
+        // Convert AsyncIterable to Buffer
+        const bytes = await readAsyncIterableToBuffer(fs.cat(resolvedCid));
+        
+        // Get metadata if available
+        let metadata = null;
+        try {
+          const filesDb = await openStore('_files', StoreType.KEYVALUE);
+          metadata = await filesDb.get(cid);
+        } catch (err) {
+          // Metadata might not exist, continue without it
+        }
+        
+        return { data: bytes, metadata };
+      } catch (error) {
+        throw new DBError(ErrorCode.FILE_NOT_FOUND, `File with CID ${cid} not found`, error);
+      }
+    } catch (error) {
+      if (error instanceof DBError) {
+        throw error;
+      }
+      
+      logger.error(`Error getting file with CID ${cid}:`, error);
+      throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to get file with CID ${cid}`, error);
+    }
+  });
+};
+
+/**
+ * Delete a file from IPFS by CID
+ */
+export const deleteFile = async (
+  cid: string,
+  options?: { connectionId?: string }
+): Promise<boolean> => {
+  return measurePerformance(async () => {
+    try {
+      const connection = getConnection(options?.connectionId);
+      
+      // Delete metadata
+      try {
+        const filesDb = await openStore('_files', StoreType.KEYVALUE);
+        await filesDb.del(cid);
+      } catch (err) {
+        // Ignore if metadata doesn't exist
+      }
+      
+      // In IPFS we can't really delete files, but we can remove them from our local blockstore
+      // and they will eventually be garbage collected if no one else has pinned them
+      logger.info(`Deleted file with CID: ${cid}`);
+      return true;
+    } catch (error) {
+      if (error instanceof DBError) {
+        throw error;
+      }
+      
+      logger.error(`Error deleting file with CID ${cid}:`, error);
+      throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to delete file with CID ${cid}`, error);
+    }
+  });
+};

src/db/stores/keyValueStore.ts

@@ -0,0 +1,335 @@
+import { createServiceLogger } from '../../utils/logger';
+import { ErrorCode, StoreType, StoreOptions, CreateResult, UpdateResult, PaginatedResult, QueryOptions, ListOptions } from '../types';
+import { DBError } from '../core/error';
+import { BaseStore, openStore, prepareDocument } from './baseStore';
+import * as cache from '../cache/cacheService';
+import * as events from '../events/eventService';
+import { measurePerformance } from '../metrics/metricsService';
+
+const logger = createServiceLogger('KEYVALUE_STORE');
+
+/**
+ * KeyValue Store implementation
+ */
+export class KeyValueStore implements BaseStore {
+  /**
+   * Create a new document in the specified collection
+   */
+  async create<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Omit<T, 'createdAt' | 'updatedAt'>, 
+    options?: StoreOptions
+  ): Promise<CreateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.KEYVALUE, options);
+        
+        // Prepare document for storage
+        const document = prepareDocument<T>(collection, data);
+        
+        // Add to database
+        const hash = await db.put(id, document);
+        
+        // Add to cache
+        const cacheKey = `${collection}:${id}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:created', { collection, id, document });
+        
+        logger.info(`Created document in ${collection} with id ${id}`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error creating document in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to create document in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Get a document by ID from a collection
+   */
+  async get<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    options?: StoreOptions & { skipCache?: boolean }
+  ): Promise<T | null> {
+    return measurePerformance(async () => {
+      try {
+        // Check cache first if not skipped
+        const cacheKey = `${collection}:${id}`;
+        if (!options?.skipCache) {
+          const cachedDocument = cache.get<T>(cacheKey);
+          if (cachedDocument) {
+            return cachedDocument;
+          }
+        }
+        
+        const db = await openStore(collection, StoreType.KEYVALUE, options);
+        const document = await db.get(id) as T | null;
+        
+        // Update cache if document exists
+        if (document) {
+          cache.set(cacheKey, document);
+        }
+        
+        return document;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error getting document ${id} from ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to get document ${id} from ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Update a document in a collection
+   */
+  async update<T extends Record<string, any>>(
+    collection: string, 
+    id: string, 
+    data: Partial<Omit<T, 'createdAt' | 'updatedAt'>>, 
+    options?: StoreOptions & { upsert?: boolean }
+  ): Promise<UpdateResult> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.KEYVALUE, options);
+        const existing = await db.get(id) as T | null;
+        
+        if (!existing && !options?.upsert) {
+          throw new DBError(
+            ErrorCode.DOCUMENT_NOT_FOUND,
+            `Document ${id} not found in ${collection}`,
+            { collection, id }
+          );
+        }
+        
+        // Prepare document for update
+        const document = prepareDocument<T>(collection, data as unknown as Omit<T, "createdAt" | "updatedAt">, existing || undefined);
+        
+        // Update in database
+        const hash = await db.put(id, document);
+        
+        // Update cache
+        const cacheKey = `${collection}:${id}`;
+        cache.set(cacheKey, document);
+        
+        // Emit change event
+        events.emit('document:updated', { collection, id, document, previous: existing });
+        
+        logger.info(`Updated document in ${collection} with id ${id}`);
+        return { id, hash };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error updating document in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to update document in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Delete a document from a collection
+   */
+  async remove(
+    collection: string, 
+    id: string, 
+    options?: StoreOptions
+  ): Promise<boolean> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.KEYVALUE, options);
+        
+        // Get the document before deleting for the event
+        const document = await db.get(id);
+        
+        // Delete from database
+        await db.del(id);
+        
+        // Remove from cache
+        const cacheKey = `${collection}:${id}`;
+        cache.del(cacheKey);
+        
+        // Emit change event
+        events.emit('document:deleted', { collection, id, document });
+        
+        logger.info(`Deleted document in ${collection} with id ${id}`);
+        return true;
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error deleting document in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to delete document in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * List all documents in a collection with pagination
+   */
+  async list<T extends Record<string, any>>(
+    collection: string, 
+    options?: ListOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.KEYVALUE, options);
+        const all = await db.all();
+        
+        let documents = Object.entries(all).map(([key, value]) => ({
+          id: key,
+          ...(value as any)
+        })) as T[];
+        
+        // Sort if requested
+        if (options?.sort) {
+          const { field, order } = options.sort;
+          documents.sort((a, b) => {
+            const valueA = a[field];
+            const valueB = b[field];
+            
+            // Handle different data types for sorting
+            if (typeof valueA === 'string' && typeof valueB === 'string') {
+              return order === 'asc' ? valueA.localeCompare(valueB) : valueB.localeCompare(valueA);
+            } else if (typeof valueA === 'number' && typeof valueB === 'number') {
+              return order === 'asc' ? valueA - valueB : valueB - valueA;
+            } else if (valueA instanceof Date && valueB instanceof Date) {
+              return order === 'asc' ? valueA.getTime() - valueB.getTime() : valueB.getTime() - valueA.getTime();
+            }
+            
+            // Default comparison for other types
+            return order === 'asc' ? 
+              String(valueA).localeCompare(String(valueB)) : 
+              String(valueB).localeCompare(String(valueA));
+          });
+        }
+        
+        const total = documents.length;
+        
+        // Apply pagination
+        const offset = options?.offset || 0;
+        const limit = options?.limit || total;
+        
+        const paginatedDocuments = documents.slice(offset, offset + limit);
+        const hasMore = offset + limit < total;
+        
+        return {
+          documents: paginatedDocuments,
+          total,
+          hasMore
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error listing documents in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to list documents in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Query documents in a collection with filtering and pagination
+   */
+  async query<T extends Record<string, any>>(
+    collection: string, 
+    filter: (doc: T) => boolean,
+    options?: QueryOptions
+  ): Promise<PaginatedResult<T>> {
+    return measurePerformance(async () => {
+      try {
+        const db = await openStore(collection, StoreType.KEYVALUE, options);
+        const all = await db.all();
+        
+        // Apply filter
+        let filtered = Object.entries(all)
+          .filter(([_, value]) => filter(value as T))
+          .map(([key, value]) => ({
+            id: key,
+            ...(value as any)
+          })) as T[];
+        
+        // Sort if requested
+        if (options?.sort) {
+          const { field, order } = options.sort;
+          filtered.sort((a, b) => {
+            const valueA = a[field];
+            const valueB = b[field];
+            
+            // Handle different data types for sorting
+            if (typeof valueA === 'string' && typeof valueB === 'string') {
+              return order === 'asc' ? valueA.localeCompare(valueB) : valueB.localeCompare(valueA);
+            } else if (typeof valueA === 'number' && typeof valueB === 'number') {
+              return order === 'asc' ? valueA - valueB : valueB - valueA;
+            } else if (valueA instanceof Date && valueB instanceof Date) {
+              return order === 'asc' ? valueA.getTime() - valueB.getTime() : valueB.getTime() - valueA.getTime();
+            }
+            
+            // Default comparison for other types
+            return order === 'asc' ? 
+              String(valueA).localeCompare(String(valueB)) : 
+              String(valueB).localeCompare(String(valueA));
+          });
+        }
+        
+        const total = filtered.length;
+        
+        // Apply pagination
+        const offset = options?.offset || 0;
+        const limit = options?.limit || total;
+        
+        const paginatedDocuments = filtered.slice(offset, offset + limit);
+        const hasMore = offset + limit < total;
+        
+        return {
+          documents: paginatedDocuments,
+          total,
+          hasMore
+        };
+      } catch (error) {
+        if (error instanceof DBError) {
+          throw error;
+        }
+        
+        logger.error(`Error querying documents in ${collection}:`, error);
+        throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to query documents in ${collection}`, error);
+      }
+    });
+  }
+  
+  /**
+   * Create an index for a collection to speed up queries
+   */
+  async createIndex(
+    collection: string,
+    field: string,
+    options?: StoreOptions
+  ): Promise<boolean> {
+    try {
+      // In a real implementation, this would register the index with OrbitDB
+      // or create a specialized data structure. For now, we'll just log the request.
+      logger.info(`Index created on ${field} for collection ${collection}`);
+      return true;
+    } catch (error) {
+      if (error instanceof DBError) {
+        throw error;
+      }
+      
+      logger.error(`Error creating index for ${collection}:`, error);
+      throw new DBError(ErrorCode.OPERATION_FAILED, `Failed to create index for ${collection}`, error);
+    }
+  }
+}

src/db/stores/storeFactory.ts

@@ -0,0 +1,54 @@
+import { createServiceLogger } from '../../utils/logger';
+import { StoreType, ErrorCode } from '../types';
+import { DBError } from '../core/error';
+import { BaseStore } from './baseStore';
+import { KeyValueStore } from './keyValueStore';
+import { DocStore } from './docStore';
+import { FeedStore } from './feedStore';
+import { CounterStore } from './counterStore';
+
+const logger = createServiceLogger('STORE_FACTORY');
+
+// Initialize instances for each store type
+const storeInstances = new Map<StoreType, BaseStore>();
+
+/**
+ * Get a store instance by type
+ */
+export function getStore(type: StoreType): BaseStore {
+  // Check if we already have an instance
+  if (storeInstances.has(type)) {
+    return storeInstances.get(type)!;
+  }
+  
+  // Create a new instance based on type
+  let store: BaseStore;
+  
+  switch (type) {
+    case StoreType.KEYVALUE:
+      store = new KeyValueStore();
+      break;
+      
+    case StoreType.DOCSTORE:
+      store = new DocStore();
+      break;
+      
+    case StoreType.FEED:
+    case StoreType.EVENTLOG: // Alias for feed
+      store = new FeedStore();
+      break;
+      
+    case StoreType.COUNTER:
+      store = new CounterStore();
+      break;
+      
+    default:
+      logger.error(`Unsupported store type: ${type}`);
+      throw new DBError(ErrorCode.STORE_TYPE_ERROR, `Unsupported store type: ${type}`);
+  }
+  
+  // Cache the instance
+  storeInstances.set(type, store);
+  
+  return store;
+}

src/db/transactions/transactionService.ts

@@ -0,0 +1,77 @@
+import { createServiceLogger } from '../../utils/logger';
+import { ErrorCode } from '../types';
+import { DBError } from '../core/error';
+
+const logger = createServiceLogger('DB_TRANSACTION');
+
+// Transaction operation type
+interface TransactionOperation {
+  type: 'create' | 'update' | 'delete';
+  collection: string;
+  id: string;
+  data?: any;
+}
+
+/**
+ * Transaction object for batching operations
+ */
+export class Transaction {
+  private operations: TransactionOperation[] = [];
+  private connectionId?: string;
+  
+  constructor(connectionId?: string) {
+    this.connectionId = connectionId;
+  }
+  
+  /**
+   * Add a create operation to the transaction
+   */
+  create<T>(collection: string, id: string, data: T): Transaction {
+    this.operations.push({
+      type: 'create',
+      collection,
+      id,
+      data
+    });
+    return this;
+  }
+  
+  /**
+   * Add an update operation to the transaction
+   */
+  update<T>(collection: string, id: string, data: Partial<T>): Transaction {
+    this.operations.push({
+      type: 'update',
+      collection,
+      id,
+      data
+    });
+    return this;
+  }
+  
+  /**
+   * Add a delete operation to the transaction
+   */
+  delete(collection: string, id: string): Transaction {
+    this.operations.push({
+      type: 'delete',
+      collection,
+      id
+    });
+    return this;
+  }
+  
+  /**
+   * Get all operations in this transaction
+   */
+  getOperations(): TransactionOperation[] {
+    return [...this.operations];
+  }
+  
+  /**
+   * Get connection ID for this transaction
+   */
+  getConnectionId(): string | undefined {
+    return this.connectionId;
+  }
+}

src/db/types/index.ts

@@ -0,0 +1,132 @@
+// Common types for database operations
+import { EventEmitter } from 'events';
+import { Transaction } from '../transactions/transactionService';
+
+export type { Transaction };
+
+// Database Types
+export enum StoreType {
+  KEYVALUE = 'keyvalue',
+  DOCSTORE = 'docstore',
+  FEED = 'feed',
+  EVENTLOG = 'eventlog',
+  COUNTER = 'counter'
+}
+
+// Common result types
+export interface CreateResult {
+  id: string;
+  hash: string;
+}
+
+export interface UpdateResult {
+  id: string;
+  hash: string;
+}
+
+export interface FileUploadResult {
+  cid: string;
+}
+
+export interface FileMetadata {
+  filename?: string;
+  size: number;
+  uploadedAt: number;
+  [key: string]: any;
+}
+
+export interface FileResult {
+  data: Buffer;
+  metadata: FileMetadata | null;
+}
+
+export interface PaginatedResult<T> {
+  documents: T[];
+  total: number;
+  hasMore: boolean;
+}
+
+// Define error codes
+export enum ErrorCode {
+  NOT_INITIALIZED = 'ERR_NOT_INITIALIZED',
+  INITIALIZATION_FAILED = 'ERR_INIT_FAILED',
+  DOCUMENT_NOT_FOUND = 'ERR_DOC_NOT_FOUND',
+  INVALID_SCHEMA = 'ERR_INVALID_SCHEMA',
+  OPERATION_FAILED = 'ERR_OPERATION_FAILED',
+  TRANSACTION_FAILED = 'ERR_TRANSACTION_FAILED',
+  FILE_NOT_FOUND = 'ERR_FILE_NOT_FOUND',
+  INVALID_PARAMETERS = 'ERR_INVALID_PARAMS',
+  CONNECTION_ERROR = 'ERR_CONNECTION',
+  STORE_TYPE_ERROR = 'ERR_STORE_TYPE',
+}
+
+// Connection pool interface
+export interface DBConnection {
+  ipfs: any;
+  orbitdb: any;
+  timestamp: number;
+  isActive: boolean;
+}
+
+// Schema validation
+export interface SchemaDefinition {
+  type: string;
+  required?: boolean;
+  pattern?: string;
+  min?: number;
+  max?: number;
+  enum?: any[];
+  items?: SchemaDefinition; // For arrays
+  properties?: Record<string, SchemaDefinition>; // For objects
+}
+
+export interface CollectionSchema {
+  properties: Record<string, SchemaDefinition>;
+  required?: string[];
+}
+
+// Metrics tracking
+export interface Metrics {
+  operations: {
+    creates: number;
+    reads: number;
+    updates: number;
+    deletes: number;
+    queries: number;
+    fileUploads: number;
+    fileDownloads: number;
+  };
+  performance: {
+    totalOperationTime: number;
+    operationCount: number;
+    averageOperationTime?: number;
+  };
+  errors: {
+    count: number;
+    byCode: Record<string, number>;
+  };
+  cacheStats: {
+    hits: number;
+    misses: number;
+  };
+  startTime: number;
+}
+
+// Store options
+export interface ListOptions {
+  limit?: number;
+  offset?: number;
+  connectionId?: string;
+  sort?: { field: string; order: 'asc' | 'desc' };
+}
+
+export interface QueryOptions extends ListOptions {
+  indexBy?: string;
+}
+
+export interface StoreOptions {
+  connectionId?: string;
+}
+
+// Event bus for database events
+export const dbEvents = new EventEmitter();

src/index.ts

@@ -2,97 +2,149 @@
 import { config, defaultConfig, type DebrosConfig } from './config';
 import { validateConfig, type ValidationResult } from './ipfs/config/configValidator';
 
-// IPFS exports
-import ipfsService, {
-  init as initIpfs,
-  stop as stopIpfs,
-  getHelia,
-  getProxyAgent,
-  getInstance,
-  getLibp2p,
-  getConnectedPeers,
-  getOptimalPeer,
-  updateNodeLoad,
-  logPeersStatus,
-  type IPFSModule,
-} from './ipfs/ipfsService';
+// Database service exports (new abstracted layer)
+import {
+  init as initDB,
+  create,
+  get,
+  update,
+  remove,
+  list,
+  query,
+  createIndex,
+  createTransaction,
+  commitTransaction,
+  subscribe,
+  uploadFile,
+  getFile,
+  deleteFile,
+  defineSchema,
+  getMetrics,
+  resetMetrics,
+  closeConnection,
+  stop as stopDB,
+} from './db/dbService';
+import { ErrorCode, StoreType } from './db/types';
 
-import { ipfsConfig, getIpfsPort, getBlockstorePath } from './ipfs/config/ipfsConfig';
+// Import types
+import type {
+  Transaction,
+  CreateResult,
+  UpdateResult,
+  PaginatedResult,
+  ListOptions,
+  QueryOptions,
+  FileUploadResult,
+  FileResult,
+  CollectionSchema,
+  SchemaDefinition,
+  Metrics,
+} from './db/types';
 
-// OrbitDB exports
-import orbitDBService, {
-  init as initOrbitDB,
-  openDB,
-  getOrbitDB,
-  db as orbitDB,
-  getOrbitDBDir,
-  getDBAddress,
-  saveDBAddress,
-} from './orbit/orbitDBService';
+import { DBError } from './db/core/error';
 
-import loadBalancerControllerDefault from './ipfs/loadBalancerController';
-export const loadBalancerController = loadBalancerControllerDefault;
+// Legacy exports (internal use only, not exposed in default export)
+import { getConnectedPeers, logPeersStatus } from './ipfs/ipfsService';
+
+// Load balancer exports
+import loadBalancerController from './ipfs/loadBalancerController';
 
 // Logger exports
-import logger, { createServiceLogger, createDebrosLogger, type LoggerOptions } from './utils/logger';
+import logger, {
+  createServiceLogger,
+  createDebrosLogger,
+  type LoggerOptions,
+} from './utils/logger';
 
-// Crypto exports
-import { getPrivateKey } from './ipfs/utils/crypto';
-
-// Export everything
+// Export public API
 export {
-  // Config
+  // Configuration
   config,
   defaultConfig,
   validateConfig,
   type DebrosConfig,
   type ValidationResult,
 
-  // IPFS
-  ipfsService,
-  initIpfs,
-  stopIpfs,
-  getHelia,
-  getProxyAgent,
-  getInstance,
-  getLibp2p,
+  // Database Service (Main public API)
+  initDB,
+  create,
+  get,
+  update,
+  remove,
+  list,
+  query,
+  createIndex,
+  createTransaction,
+  commitTransaction,
+  subscribe,
+  uploadFile,
+  getFile,
+  deleteFile,
+  defineSchema,
+  getMetrics,
+  resetMetrics,
+  closeConnection,
+  stopDB,
+  ErrorCode,
+  StoreType,
+
+  // Load Balancer
+  loadBalancerController,
   getConnectedPeers,
-  getOptimalPeer,
-  updateNodeLoad,
   logPeersStatus,
-  type IPFSModule,
 
-  // IPFS Config
-  ipfsConfig,
-  getIpfsPort,
-  getBlockstorePath,
-
-  // OrbitDB
-  orbitDBService,
-  initOrbitDB,
-  openDB,
-  getOrbitDB,
-  orbitDB,
-  getOrbitDBDir,
-  getDBAddress,
-  saveDBAddress,
+  // Types
+  type Transaction,
+  type DBError,
+  type CollectionSchema,
+  type SchemaDefinition,
+  type CreateResult,
+  type UpdateResult,
+  type PaginatedResult,
+  type ListOptions,
+  type QueryOptions,
+  type FileUploadResult,
+  type FileResult,
+  type Metrics,
 
   // Logger
   logger,
   createServiceLogger,
   createDebrosLogger,
   type LoggerOptions,
-
-  // Crypto
-  getPrivateKey,
 };
 
 // Default export for convenience
 export default {
   config,
   validateConfig,
-  ipfsService,
-  orbitDBService,
+  // Database Service as main interface
+  db: {
+    init: initDB,
+    create,
+    get,
+    update,
+    remove,
+    list,
+    query,
+    createIndex,
+    createTransaction,
+    commitTransaction,
+    subscribe,
+    uploadFile,
+    getFile,
+    deleteFile,
+    defineSchema,
+    getMetrics,
+    resetMetrics,
+    closeConnection,
+    stop: stopDB,
+    ErrorCode,
+    StoreType,
+  },
+  loadBalancerController,
+  logPeersStatus,
+  getConnectedPeers,
   logger,
   createServiceLogger,
 };

src/orbit/orbitDBService.ts

@@ -74,7 +74,7 @@ export const openDB = async (name: string, type: string) => {
     const dbOptions = {
       type,
       overwrite: false,
-      AccessController: IPFSAccessController({ write: ['*'], storage: getHelia() }),
+      AccessController: IPFSAccessController({ write: ['*'] }),
     };
 
     if (existingAddress) {

tsconfig.json

@@ -50,7 +50,7 @@
     //   ]
     // },
   },
-  "include": ["src/**/*", "orbitdb.d.ts"],
+  "include": ["src/**/*", "orbitdb.d.ts", "types.d.ts"],
   "exclude": ["coverage", "dist", "eslint.config.js", "node_modules"],
   "ts-node": {
     "esm": true

types.d.ts

@@ -2,11 +2,15 @@
 // Project: https://github.com/debros/anchat-relay
 // Definitions by: Debros Team
 
-declare module "@debros/network" {
-  import { Request, Response, NextFunction } from "express";
+declare module '@debros/network' {
+  import { Request, Response, NextFunction } from 'express';
 
   // Config types
   export interface DebrosConfig {
+    env: {
+      fingerprint: string;
+      port: number;
+    };
     ipfs: {
       swarm: {
         port: number;
@@ -15,9 +19,15 @@ declare module "@debros/network" {
         connectAddresses: string[];
       };
       blockstorePath: string;
-      orbitdbPath: string;
       bootstrap: string[];
       privateKey?: string;
+      serviceDiscovery?: {
+        topic: string;
+        heartbeatInterval: number;
+      };
+    };
+    orbitdb: {
+      directory: string;
     };
     logger: {
       level: string;
@@ -33,66 +43,216 @@ declare module "@debros/network" {
   // Core configuration
   export const config: DebrosConfig;
   export const defaultConfig: DebrosConfig;
-  export function validateConfig(
-    config: Partial<DebrosConfig>
-  ): ValidationResult;
+  export function validateConfig(config: Partial<DebrosConfig>): ValidationResult;
 
-  // IPFS types
-  export interface IPFSModule {
-    helia: any;
-    libp2p: any;
+  // Store types
+  export enum StoreType {
+    KEYVALUE = 'keyvalue',
+    DOCSTORE = 'docstore',
+    FEED = 'feed',
+    EVENTLOG = 'eventlog',
+    COUNTER = 'counter',
   }
 
-  // IPFS Service
-  export const ipfsService: {
-    init(): Promise<IPFSModule>;
-    stop(): Promise<void>;
-  };
-  export function initIpfs(): Promise<IPFSModule>;
-  export function stopIpfs(): Promise<void>;
-  export function getHelia(): any;
-  export function getProxyAgent(): any;
-  export function getInstance(): IPFSModule;
-  export function getLibp2p(): any;
-  export function getConnectedPeers(): any[];
-  export function getOptimalPeer(): any;
-  export function updateNodeLoad(load: number): void;
-  export function logPeersStatus(): void;
-
-  // IPFS Config
-  export const ipfsConfig: any;
-  export function getIpfsPort(): number;
-  export function getBlockstorePath(): string;
-
-  // LoadBalancerController interface and value declaration
-  export interface LoadBalancerController {
-    getNodeInfo: (_req: Request, _res: Response, _next: NextFunction) => void;
-    getOptimalPeer: (
-      _req: Request,
-      _res: Response,
-      _next: NextFunction
-    ) => void;
-    getAllPeers: (_req: Request, _res: Response, _next: NextFunction) => void;
+  // Error handling
+  export enum ErrorCode {
+    NOT_INITIALIZED = 'ERR_NOT_INITIALIZED',
+    INITIALIZATION_FAILED = 'ERR_INIT_FAILED',
+    DOCUMENT_NOT_FOUND = 'ERR_DOC_NOT_FOUND',
+    INVALID_SCHEMA = 'ERR_INVALID_SCHEMA',
+    OPERATION_FAILED = 'ERR_OPERATION_FAILED',
+    TRANSACTION_FAILED = 'ERR_TRANSACTION_FAILED',
+    FILE_NOT_FOUND = 'ERR_FILE_NOT_FOUND',
+    INVALID_PARAMETERS = 'ERR_INVALID_PARAMS',
+    CONNECTION_ERROR = 'ERR_CONNECTION',
+    STORE_TYPE_ERROR = 'ERR_STORE_TYPE',
   }
 
-  // Declare loadBalancerController as a value
-  export const loadBalancerController: LoadBalancerController;
+  export class DBError extends Error {
+    code: ErrorCode;
+    details?: any;
+    constructor(code: ErrorCode, message: string, details?: any);
+  }
 
-  // OrbitDB
-  export const orbitDBService: {
-    init(): Promise<any>;
+  // Schema validation
+  export interface SchemaDefinition {
+    type: string;
+    required?: boolean;
+    pattern?: string;
+    min?: number;
+    max?: number;
+    enum?: any[];
+    items?: SchemaDefinition; // For arrays
+    properties?: Record<string, SchemaDefinition>; // For objects
+  }
+
+  export interface CollectionSchema {
+    properties: Record<string, SchemaDefinition>;
+    required?: string[];
+  }
+
+  // Database types
+  export interface DocumentMetadata {
+    createdAt: number;
+    updatedAt: number;
+  }
+
+  export interface Document extends DocumentMetadata {
+    [key: string]: any;
+  }
+
+  export interface CreateResult {
+    id: string;
+    hash: string;
+  }
+
+  export interface UpdateResult {
+    id: string;
+    hash: string;
+  }
+
+  export interface FileUploadResult {
+    cid: string;
+  }
+
+  export interface FileMetadata {
+    filename?: string;
+    size: number;
+    uploadedAt: number;
+    [key: string]: any;
+  }
+
+  export interface FileResult {
+    data: Buffer;
+    metadata: FileMetadata | null;
+  }
+
+  export interface ListOptions {
+    limit?: number;
+    offset?: number;
+    sort?: { field: string; order: 'asc' | 'desc' };
+    connectionId?: string;
+    storeType?: StoreType;
+  }
+
+  export interface QueryOptions extends ListOptions {
+    indexBy?: string;
+  }
+
+  export interface PaginatedResult<T> {
+    documents: T[];
+    total: number;
+    hasMore: boolean;
+  }
+
+  // Transaction API
+  export class Transaction {
+    create<T>(collection: string, id: string, data: T): Transaction;
+    update<T>(collection: string, id: string, data: Partial<T>): Transaction;
+    delete(collection: string, id: string): Transaction;
+    commit(): Promise<{ success: boolean; results: any[] }>;
+  }
+
+  // Metrics tracking
+  export interface Metrics {
+    operations: {
+      creates: number;
+      reads: number;
+      updates: number;
+      deletes: number;
+      queries: number;
+      fileUploads: number;
+      fileDownloads: number;
     };
-  export function initOrbitDB(): Promise<any>;
-  export function openDB(
-    dbName: string,
-    dbType: string,
-    options?: any
-  ): Promise<any>;
-  export function getOrbitDB(): any;
-  export const orbitDB: any;
-  export function getOrbitDBDir(): string;
-  export function getDBAddress(dbName: string): string | null;
-  export function saveDBAddress(dbName: string, address: string): void;
+    performance: {
+      totalOperationTime: number;
+      operationCount: number;
+      averageOperationTime: number;
+    };
+    errors: {
+      count: number;
+      byCode: Record<string, number>;
+    };
+    cacheStats: {
+      hits: number;
+      misses: number;
+    };
+    startTime: number;
+  }
+
+  // Database Operations
+  export function initDB(connectionId?: string): Promise<string>;
+  export function create<T extends Record<string, any>>(
+    collection: string,
+    id: string,
+    data: Omit<T, 'createdAt' | 'updatedAt'>,
+    options?: { connectionId?: string; storeType?: StoreType },
+  ): Promise<CreateResult>;
+  export function get<T extends Record<string, any>>(
+    collection: string,
+    id: string,
+    options?: { connectionId?: string; skipCache?: boolean; storeType?: StoreType },
+  ): Promise<T | null>;
+  export function update<T extends Record<string, any>>(
+    collection: string,
+    id: string,
+    data: Partial<Omit<T, 'createdAt' | 'updatedAt'>>,
+    options?: { connectionId?: string; upsert?: boolean; storeType?: StoreType },
+  ): Promise<UpdateResult>;
+  export function remove(
+    collection: string,
+    id: string,
+    options?: { connectionId?: string; storeType?: StoreType },
+  ): Promise<boolean>;
+  export function list<T extends Record<string, any>>(
+    collection: string,
+    options?: ListOptions,
+  ): Promise<PaginatedResult<T>>;
+  export function query<T extends Record<string, any>>(
+    collection: string,
+    filter: (doc: T) => boolean,
+    options?: QueryOptions,
+  ): Promise<PaginatedResult<T>>;
+
+  // Schema operations
+  export function defineSchema(collection: string, schema: CollectionSchema): void;
+
+  // Transaction operations
+  export function createTransaction(connectionId?: string): Transaction;
+  export function commitTransaction(
+    transaction: Transaction,
+  ): Promise<{ success: boolean; results: any[] }>;
+
+  // Index operations
+  export function createIndex(
+    collection: string,
+    field: string,
+    options?: { connectionId?: string; storeType?: StoreType },
+  ): Promise<boolean>;
+
+  // Subscription API
+  export function subscribe(
+    event: 'document:created' | 'document:updated' | 'document:deleted',
+    callback: (data: any) => void,
+  ): () => void;
+
+  // File operations
+  export function uploadFile(
+    fileData: Buffer,
+    options?: { filename?: string; connectionId?: string; metadata?: Record<string, any> },
+  ): Promise<FileUploadResult>;
+  export function getFile(cid: string, options?: { connectionId?: string }): Promise<FileResult>;
+  export function deleteFile(cid: string, options?: { connectionId?: string }): Promise<boolean>;
+
+  // Connection management
+  export function closeConnection(connectionId: string): Promise<boolean>;
+
+  // Metrics
+  export function getMetrics(): Metrics;
+  export function resetMetrics(): void;
+
+  // Stop
+  export function stopDB(): Promise<void>;
 
   // Logger
   export interface LoggerOptions {
@@ -101,21 +261,67 @@ declare module "@debros/network" {
     service?: string;
   }
   export const logger: any;
-  export function createServiceLogger(
-    name: string,
-    options?: LoggerOptions
-  ): any;
+  export function createServiceLogger(name: string, options?: LoggerOptions): any;
   export function createDebrosLogger(options?: LoggerOptions): any;
 
-  // Crypto
-  export function getPrivateKey(): Promise<string>;
+  // Load Balancer
+  export interface LoadBalancerControllerModule {
+    getNodeInfo: (req: Request, res: Response, next: NextFunction) => void;
+    getOptimalPeer: (req: Request, res: Response, next: NextFunction) => void;
+    getAllPeers: (req: Request, res: Response, next: NextFunction) => void;
+  }
+  export const loadBalancerController: LoadBalancerControllerModule;
+
+  export const getConnectedPeers: () => Map<
+    string,
+    {
+      lastSeen: number;
+      load: number;
+      publicAddress: string;
+      fingerprint: string;
+    }
+  >;
+
+  export const logPeersStatus: () => void;
 
   // Default export
   const defaultExport: {
     config: DebrosConfig;
     validateConfig: typeof validateConfig;
-    ipfsService: typeof ipfsService;
-    orbitDBService: typeof orbitDBService;
+    db: {
+      init: typeof initDB;
+      create: typeof create;
+      get: typeof get;
+      update: typeof update;
+      remove: typeof remove;
+      list: typeof list;
+      query: typeof query;
+      createIndex: typeof createIndex;
+      createTransaction: typeof createTransaction;
+      commitTransaction: typeof commitTransaction;
+      subscribe: typeof subscribe;
+      uploadFile: typeof uploadFile;
+      getFile: typeof getFile;
+      deleteFile: typeof deleteFile;
+      defineSchema: typeof defineSchema;
+      getMetrics: typeof getMetrics;
+      resetMetrics: typeof resetMetrics;
+      closeConnection: typeof closeConnection;
+      stop: typeof stopDB;
+      ErrorCode: typeof ErrorCode;
+      StoreType: typeof StoreType;
+    };
+    loadBalancerController: LoadBalancerControllerModule;
+    getConnectedPeers: () => Map<
+      string,
+      {
+        lastSeen: number;
+        load: number;
+        publicAddress: string;
+        fingerprint: string;
+      }
+    >;
+    logPeersStatus: () => void;
     logger: any;
     createServiceLogger: typeof createServiceLogger;
   };