✨ Fully rewrite relay

migrations/9-createOutboundEventQueue.sql

@@ -0,0 +1,41 @@
+-- Create outbound event queue for offline event creation and reliable relay transmission
+-- This allows users to create events when offline and sync them when connectivity is restored
+
+CREATE TABLE outbound_event_queue (
+    queue_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    event_id TEXT NOT NULL,
+    encrypted_event TEXT NOT NULL,
+    ccn_pubkey TEXT NOT NULL,
+    created_at INTEGER NOT NULL DEFAULT (unixepoch()),
+    attempts INTEGER NOT NULL DEFAULT 0,
+    last_attempt INTEGER NULL,
+    status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'sending', 'sent', 'failed')),
+    error_message TEXT NULL,
+
+    -- Ensure one queue entry per event
+    UNIQUE(event_id),
+
+    -- Foreign key constraints
+    FOREIGN KEY (ccn_pubkey) REFERENCES ccns(pubkey) ON DELETE CASCADE,
+    FOREIGN KEY (event_id) REFERENCES events(id) ON DELETE CASCADE
+);
+
+-- Indexes for efficient querying
+CREATE INDEX idx_outbound_queue_status ON outbound_event_queue(status);
+CREATE INDEX idx_outbound_queue_ccn_pubkey ON outbound_event_queue(ccn_pubkey);
+CREATE INDEX idx_outbound_queue_created_at ON outbound_event_queue(created_at);
+CREATE INDEX idx_outbound_queue_last_attempt ON outbound_event_queue(last_attempt);
+
+-- Cleanup trigger for old completed/failed events
+CREATE TRIGGER cleanup_old_queue_entries
+AFTER UPDATE ON outbound_event_queue
+WHEN NEW.status IN ('sent', 'failed') AND NEW.attempts >= 5
+BEGIN
+    -- Keep failed events for 30 days for debugging, sent events for 1 day
+    DELETE FROM outbound_event_queue
+    WHERE queue_id = NEW.queue_id
+    AND (
+        (status = 'sent' AND created_at < (unixepoch() - 86400)) OR
+        (status = 'failed' AND created_at < (unixepoch() - 2592000))
+    );
+END;