diff --git a/src/main.js b/src/main.js
index 1260192..cbb8cc2 100644
--- a/src/main.js
+++ b/src/main.js
@@ -8,7 +8,11 @@ import { fileURLToPath } from 'url';
 import request from 'request';
 import { server } from './server.js';
 import MBTiles from '@mapbox/mbtiles';
-import { PMtilesOpen, PMtilesClose, GetPMtilesInfo } from './pmtiles_adapter.js';
+import {
+  PMtilesOpen,
+  PMtilesClose,
+  GetPMtilesInfo,
+} from './pmtiles_adapter.js';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
@@ -119,7 +123,9 @@ const startWithinputFile = async (inputFile) => {
     let FileOpenInfo = PMtilesOpen(inputFile);
     const info = await GetPMtilesInfo(FileOpenInfo.pmtiles);
     const metadata = info.metadata;
-    if (FileOpenInfo.fd !== undefined) {PMtilesClose(FileOpenInfo.fd);}
+    if (FileOpenInfo.fd !== undefined) {
+      PMtilesClose(FileOpenInfo.fd);
+    }
     FileOpenInfo = null;
 
     if (
diff --git a/src/pmtiles_adapter.js b/src/pmtiles_adapter.js
index 4f7dd09..72891e4 100644
--- a/src/pmtiles_adapter.js
+++ b/src/pmtiles_adapter.js
@@ -30,8 +30,8 @@ export const PMtilesOpen = (FilePath) => {
   let pmtiles = undefined;
   let fd = undefined;
 
-  if(isValidHttpUrl(FilePath)) {
-    const source = new PMTiles.FetchSource(FilePath)
+  if (isValidHttpUrl(FilePath)) {
+    const source = new PMTiles.FetchSource(FilePath);
     pmtiles = new PMTiles.PMTiles(source);
   } else {
     fd = fs.openSync(FilePath, 'r');
@@ -123,14 +123,18 @@ const ArrayBufferToBuffer = (array_buffer) => {
   return buffer;
 };
 
+/**
+ *
+ * @param string
+ */
 function isValidHttpUrl(string) {
   let url;
-  
+
   try {
     url = new URL(string);
   } catch (_) {
-    return false;  
+    return false;
   }
 
-  return url.protocol === "http:" || url.protocol === "https:";
-}
\ No newline at end of file
+  return url.protocol === 'http:' || url.protocol === 'https:';
+}
diff --git a/src/serve_data.js b/src/serve_data.js
index 74918a8..915795d 100644
--- a/src/serve_data.js
+++ b/src/serve_data.js
@@ -11,7 +11,11 @@ import Pbf from 'pbf';
 import { VectorTile } from '@mapbox/vector-tile';
 
 import { getTileUrls, fixTileJSONCenter } from './utils.js';
-import { PMtilesOpen, GetPMtilesInfo, GetPMtilesTile } from './pmtiles_adapter.js';
+import {
+  PMtilesOpen,
+  GetPMtilesInfo,
+  GetPMtilesTile,
+} from './pmtiles_adapter.js';
 
 export const serve_data = {
   init: (options, repo) => {
diff --git a/src/serve_rendered.js b/src/serve_rendered.js
index 46111eb..a50d696 100644
--- a/src/serve_rendered.js
+++ b/src/serve_rendered.js
@@ -19,7 +19,11 @@ import polyline from '@mapbox/polyline';
 import proj4 from 'proj4';
 import request from 'request';
 import { getFontsPbf, getTileUrls, fixTileJSONCenter } from './utils.js';
-import { PMtilesOpen, GetPMtilesInfo, GetPMtilesTile } from './pmtiles_adapter.js';
+import {
+  PMtilesOpen,
+  GetPMtilesInfo,
+  GetPMtilesTile,
+} from './pmtiles_adapter.js';
 
 const FLOAT_PATTERN = '[+-]?(?:\\d+|\\d+.?\\d+)';
 const PATH_PATTERN =