diff --git a/.gitignore b/.gitignore
index dd87e2d..61e2846 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 node_modules
 build
+/metadata
+/user_defined
\ No newline at end of file
diff --git a/example.js b/example.js
index 374f216..d4ee9c1 100644
--- a/example.js
+++ b/example.js
@@ -1,12 +1,13 @@
-const addon = require('.');
-const db = new addon.db('CSV')
+const addon = require(".");
+const db = new addon.db("CSV");
 var result;
 
 // Test query
 result = db.query("SELECT version()");
-console.log(result)
+console.log(result);
 
 // Test session
 db.session("CREATE FUNCTION IF NOT EXISTS hello AS () -> 'chDB'");
 result = db.session("SELECT hello()", "TabSeparated");
-console.log(result)
+
+console.log(result);
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..54c931f
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,22 @@
+declare interface ChdbModule {
+  Execute(query: string, format: string): string;
+  Session(query: string, format: string, path: string): string;
+}
+
+declare const chdb: ChdbModule;
+
+declare interface DB {
+  format: string;
+  path: string;
+  query(query: string, format?: string): string;
+  session(query: string, format?: string, path?: string): string;
+}
+
+declare interface DBFactory {
+  (format?: string, path?: string): DB;
+  new (format?: string, path?: string): DB;
+}
+
+declare const db: DBFactory;
+
+export { chdb, db };
diff --git a/index.js b/index.js
index 8034e73..909168b 100644
--- a/index.js
+++ b/index.js
@@ -1,10 +1,8 @@
-//const chdb = require('./build/chdb.node');
-const chdb = require('node-gyp-build')(__dirname)
+const chdb = require("node-gyp-build")(__dirname);
 
 function db(format, path) {
-
-  this.format = format || 'JSONCompact';
-  this.path = path || '.';
+  this.format = format || "JSONCompact";
+  this.path = path || ".";
 
   // add properties to this
   this.query = (query, format) => chdb.Execute(query, format || this.format);
diff --git a/package-lock.json b/package-lock.json
index 09f13e3..c37bdcd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "chdb-node",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "chdb-node",
-      "version": "1.0.1",
+      "version": "1.0.2",
       "hasInstallScript": true,
       "license": "AGPLv3",
       "dependencies": {
diff --git a/prebuilds/darwin-arm64/node.napi.node b/prebuilds/darwin-arm64/node.napi.node
new file mode 100755
index 0000000..08403e2
Binary files /dev/null and b/prebuilds/darwin-arm64/node.napi.node differ
diff --git a/sessions.js b/sessions.js
index ffe15cb..2c4f0ef 100644
--- a/sessions.js
+++ b/sessions.js
@@ -1,9 +1,28 @@
-const addon = require('.');
+const addon = require(".");
 var res;
 
-addon.Session("CREATE DATABASE IF NOT EXISTS db_xxx Engine=Atomic;", "CSV", ".")
-addon.Session("CREATE TABLE IF NOT EXISTS db_xxx.log_table_xxx (x String, y Int) ENGINE = Log;", "CSV", ".")
-addon.Session("INSERT INTO db_xxx.log_table_xxx VALUES ('a', 1), ('b', 3), ('c', 2), ('d', 5);", "CSV", ".")
-res = addon.Session("SELECT * FROM db_xxx.log_table_xxx LIMIT 4;", "Pretty", ".")
-console.log(res);
+addon.Session(
+  "CREATE DATABASE IF NOT EXISTS db_xxx Engine=Atomic;",
+  "CSV",
+  "."
+);
+
+addon.Session(
+  "CREATE TABLE IF NOT EXISTS db_xxx.log_table_xxx (x String, y Int) ENGINE = Log;",
+  "CSV",
+  "."
+);
+
+addon.Session(
+  "INSERT INTO db_xxx.log_table_xxx VALUES ('a', 1), ('b', 3), ('c', 2), ('d', 5);",
+  "CSV",
+  "."
+);
 
+res = addon.Session(
+  "SELECT * FROM db_xxx.log_table_xxx LIMIT 4;",
+  "Pretty",
+  "."
+);
+
+console.log(res);