refactor

src-tauri/migrations/20230418080146_create_chats.sql

@@ -3,8 +3,9 @@
 CREATE TABLE
   chats (
     id INTEGER NOT NULL PRIMARY KEY,
-    account_id INTEGER NOT NULL,
-    pubkey TEXT NOT NULL UNIQUE,
-    created_at INTEGER NOT NULL,
-    FOREIGN KEY (account_id) REFERENCES accounts (id)
+    event_id TEXT NOT NULL UNIQUE,
+    receiver_pubkey INTEGER NOT NULL,
+    sender_pubkey TEXT NOT NULL,
+    content TEXT NOT NULL,
+    created_at INTEGER NOT NULL
   );