Register devices and report verified holdings to the server

server/p2p-db.js

@@ -63,6 +63,7 @@ export async function initP2pSchema() {
   // media_cache.sha256 — the cid of the current <id>.<gen>.mp4 (plan 009).
   try { await db.execute('ALTER TABLE media_cache ADD COLUMN sha256 TEXT'); }
   catch (e) { if (!/duplicate column/i.test(String(e.message))) throw e; }
+  await db.execute('CREATE INDEX IF NOT EXISTS idx_media_sha256 ON media_cache (sha256)');
 }
 
 const rowsOf = (r) => r.rows.map((row) => {
@@ -258,3 +259,12 @@ export async function listMediaEvictionOrder({ now, keepMinViews, keepDays, keep
     || (a.last_access - b.last_access));
   return rows;
 }
+
+// The server's own ready copy whose mp4 has this content id (or null).
+export async function findMediaByCid(cid) {
+  const r = await db.execute({
+    sql: "SELECT video_id, gen FROM media_cache WHERE sha256 = ? AND status = 'ready' LIMIT 1",
+    args: [cid],
+  });
+  return rowsOf(r)[0] || null;
+}