aimedb: Enhance typing

src/aimedb/index.ts

@@ -1,8 +1,10 @@
+import { Socket } from "net";
+
 import { dispatch } from "./handler";
 import { AimeRequest } from "./request";
 import { setup } from "./pipeline";
 
-export default async function aimedb(socket) {
+export default async function aimedb(socket: Socket) {
   console.log("Aimedb: Connection opened");
 
   const { input, output } = setup(socket);

src/aimedb/pipeline.ts

@@ -1,13 +1,23 @@
 import * as crypto from "crypto";
+import { Socket } from "net";
 import { pipeline } from "stream";
 
 import { Decoder } from "./decoder";
 import { Deframer } from "./frame";
 import { Encoder } from "./encoder";
+import { AimeRequest } from "./request";
+import { AimeResponse } from "./response";
 
 const K = Buffer.from("Copyright(C)SEGA", "utf8");
 
-export function setup(socket) {
+export interface Session {
+  input: AsyncIterable<AimeRequest>;
+  output: {
+    write(res: AimeResponse): void;
+  };
+}
+
+export function setup(socket: Socket): Session {
   const input = pipeline(
     socket,
     crypto.createDecipheriv("aes-128-ecb", K, null).setAutoPadding(false),