#4 added simple DB layer

src/service/db/index.ts

@@ -0,0 +1,17 @@
+import { VkEvent } from "../vk/types";
+import { Event, Like } from "./types";
+
+export interface Storage {
+  getEvent(
+    type: VkEvent,
+    id: number,
+    groupId: number,
+    channel: string
+  ): Promise<Event>;
+
+  createEvent(event: Event): Promise<Event>;
+
+  getLikesFor(channel: string, messageId: number): Promise<Like[]>;
+
+  getLikeBy(channel: string, messageId: number, author: number): Promise<Like>;
+}