Basic relay functionality completed

db/schema.sql

@@ -1,66 +1,90 @@
 -- C Nostr Relay Database Schema
--- Simplified schema with just event and tag tables
--- SQLite database for storing Nostr events
+-- SQLite schema for storing Nostr events with JSON tags support
 
--- ============================================================================
--- DATABASE SETTINGS
--- ============================================================================
+-- Schema version tracking
+PRAGMA user_version = 2;
 
-PRAGMA encoding = "UTF-8";
-PRAGMA journal_mode = WAL;
-PRAGMA auto_vacuum = FULL;
-PRAGMA synchronous = NORMAL;
+-- Enable foreign key support
 PRAGMA foreign_keys = ON;
 
--- ============================================================================
--- EVENT TABLE
--- ============================================================================
+-- Optimize for performance
+PRAGMA journal_mode = WAL;
+PRAGMA synchronous = NORMAL;
+PRAGMA cache_size = 10000;
 
--- Main event table - stores all Nostr events
-CREATE TABLE IF NOT EXISTS event (
+-- Core events table with hybrid single-table design
+CREATE TABLE events (
     id TEXT PRIMARY KEY,                -- Nostr event ID (hex string)
     pubkey TEXT NOT NULL,               -- Public key of event author (hex string)
     created_at INTEGER NOT NULL,       -- Event creation timestamp (Unix timestamp)
     kind INTEGER NOT NULL,              -- Event kind (0-65535)
+    event_type TEXT NOT NULL CHECK (event_type IN ('regular', 'replaceable', 'ephemeral', 'addressable')),
     content TEXT NOT NULL,              -- Event content (text content only)
-    sig TEXT NOT NULL                   -- Event signature (hex string)
+    sig TEXT NOT NULL,                  -- Event signature (hex string)
+    tags JSON NOT NULL DEFAULT '[]',   -- Event tags as JSON array
+    first_seen INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))  -- When relay received event
 );
 
--- Event indexes for performance
-CREATE INDEX IF NOT EXISTS event_pubkey_index ON event(pubkey);
-CREATE INDEX IF NOT EXISTS event_created_at_index ON event(created_at);
-CREATE INDEX IF NOT EXISTS event_kind_index ON event(kind);
-CREATE INDEX IF NOT EXISTS event_pubkey_created_at_index ON event(pubkey, created_at);
-CREATE INDEX IF NOT EXISTS event_kind_created_at_index ON event(kind, created_at);
+-- Core performance indexes
+CREATE INDEX idx_events_pubkey ON events(pubkey);
+CREATE INDEX idx_events_kind ON events(kind);
+CREATE INDEX idx_events_created_at ON events(created_at DESC);
+CREATE INDEX idx_events_event_type ON events(event_type);
 
--- ============================================================================
--- TAG TABLE
--- ============================================================================
+-- Composite indexes for common query patterns
+CREATE INDEX idx_events_kind_created_at ON events(kind, created_at DESC);
+CREATE INDEX idx_events_pubkey_created_at ON events(pubkey, created_at DESC);
+CREATE INDEX idx_events_pubkey_kind ON events(pubkey, kind);
 
--- Tag table for storing event tags
-CREATE TABLE IF NOT EXISTS tag (
-    id TEXT NOT NULL,                       -- Nostr event ID (references event.id)
-    name TEXT NOT NULL,                     -- Tag name (e.g., "e", "p", "d")
-    value TEXT NOT NULL,                    -- Tag value
-    parameters TEXT,                        -- Additional tag parameters (JSON string)
-    FOREIGN KEY(id) REFERENCES event(id) ON UPDATE CASCADE ON DELETE CASCADE
+-- Schema information table
+CREATE TABLE schema_info (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL,
+    updated_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
 );
 
--- Tag indexes for performance
-CREATE INDEX IF NOT EXISTS tag_id_index ON tag(id);
-CREATE INDEX IF NOT EXISTS tag_name_index ON tag(name);
-CREATE INDEX IF NOT EXISTS tag_name_value_index ON tag(name, value);
-CREATE INDEX IF NOT EXISTS tag_id_name_index ON tag(id, name);
+-- Insert schema metadata
+INSERT INTO schema_info (key, value) VALUES 
+    ('version', '2'),
+    ('description', 'Hybrid single-table Nostr relay schema with JSON tags'),
+    ('created_at', strftime('%s', 'now'));
 
--- ============================================================================
--- PERFORMANCE OPTIMIZATIONS
--- ============================================================================
+-- Helper views for common queries
+CREATE VIEW recent_events AS
+SELECT id, pubkey, created_at, kind, event_type, content
+FROM events
+WHERE event_type != 'ephemeral'
+ORDER BY created_at DESC
+LIMIT 1000;
 
--- Enable query planner optimizations
-PRAGMA optimize;
+CREATE VIEW event_stats AS
+SELECT 
+    event_type,
+    COUNT(*) as count,
+    AVG(length(content)) as avg_content_length,
+    MIN(created_at) as earliest,
+    MAX(created_at) as latest
+FROM events
+GROUP BY event_type;
 
--- Set recommended pragmas for performance
-PRAGMA main.synchronous = NORMAL;
-PRAGMA foreign_keys = ON;
-PRAGMA temp_store = 2;              -- use memory for temp tables
-PRAGMA main.cache_size = 10000;     -- 40MB cache per connection
+-- Optimization: Trigger for automatic cleanup of ephemeral events older than 1 hour
+CREATE TRIGGER cleanup_ephemeral_events
+    AFTER INSERT ON events
+    WHEN NEW.event_type = 'ephemeral'
+BEGIN
+    DELETE FROM events 
+    WHERE event_type = 'ephemeral' 
+    AND first_seen < (strftime('%s', 'now') - 3600);
+END;
+
+-- Replaceable event handling trigger
+CREATE TRIGGER handle_replaceable_events
+    AFTER INSERT ON events
+    WHEN NEW.event_type = 'replaceable'
+BEGIN
+    DELETE FROM events 
+    WHERE pubkey = NEW.pubkey 
+    AND kind = NEW.kind 
+    AND event_type = 'replaceable'
+    AND id != NEW.id;
+END;