Init indexed file

lib/dat/serializers.ts

@@ -0,0 +1,32 @@
+// src/data-file/serializers.ts
+import type { Serializer } from './types.js';
+
+export function jsonSerializer<T>(): Serializer<T> {
+  return {
+    serialize(data: T): Buffer {
+      return Buffer.from(JSON.stringify(data), 'utf8');
+    },
+    deserialize(buf: Buffer): T {
+      return JSON.parse(buf.toString('utf8'));
+    },
+  };
+}
+
+export function msgpackSerializer<T>(): Serializer<T> {
+  const { encode, decode } = require('@msgpack/msgpack');
+  return {
+    serialize(data: T): Buffer {
+      return Buffer.from(encode(data));
+    },
+    deserialize(buf: Buffer): T {
+      return decode(buf) as T;
+    },
+  };
+}
+
+export function createSerializer<T>(
+  serialize: (data: T) => Buffer,
+  deserialize: (buf: Buffer) => T
+): Serializer<T> {
+  return { serialize, deserialize };
+}