diff --git a/README.md b/README.md
index e9a6a64..b63638b 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
-# mincecraft-mod-packager
+# minecraft-mod-packager
 
-A minecraft mod package manager
\ No newline at end of file
+A minecraft mod package manager
diff --git a/src/curse.js b/src/curse.js
new file mode 100644
index 0000000..6c4bf53
--- /dev/null
+++ b/src/curse.js
@@ -0,0 +1,113 @@
+const { http, https } = require('follow-redirects');
+const fs = require("fs");
+let downloadStarted = false;
+let mods_lock;
+let dep = new Map();
+try {
+	mods_lock = new Map(Object.entries(mods_lock));
+} catch {
+	mods_lock = new Map;
+}
+global.config.mods.curse.forEach(mod => {
+	getData(`search?categoryId=0&gameId=432&gameVersion=${encodeURI(global.config.gameVersion)}&index=0&pageSize=15&searchFilter=${encodeURI(mod)}&sectionId=6&sort=2`, (result) => { // resolve projectID
+		resolveDep(result[0].id, downloadMods);
+	});
+});
+
+var resolveDepRecursionCount = [];
+function resolveDep(modId, callback, index) {
+	if(index === undefined) index = resolveDepRecursionCount.push(0) - 1;
+	++resolveDepRecursionCount[index];
+	getData(`${modId}/files`, (files) => {
+		let rightVersion;
+		for(let i = files.length - 1; i >= 0; --i) {
+			let versionArray = files[i].gameVersion;
+			if(versionMatch(versionArray, global.config.gameVersion) && (versionMatch(versionArray, global.config.modloader) || modloaderMatch(versionArray, global.config.modloader))) {
+				rightVersion = files[i];
+				dep.set(modId, {fileId: rightVersion.id, url: rightVersion.downloadUrl});
+			}
+		}
+		rightVersion.dependencies.forEach(mod => {
+			resolveDep(mod.addonId, callback, index);
+		});
+		--resolveDepRecursionCount[index];
+		if(resolveDepRecursionCount[index] == 0) callback();
+	});
+}
+
+function getData(url, callback) {
+	https.get(`https://addons-ecs.forgesvc.net/api/v2/addon/${url}`, (resp) => {
+		let data = '';
+		resp.on('data', (chunk) => {
+			data += chunk;
+		});
+		resp.on("end", () => {
+			callback(JSON.parse(data));
+		});
+	});
+}
+
+function versionMatch(versionArray, gameVersion) {
+	let gameVersionMatch = false;
+	versionArray.forEach(version => {
+		gameVersionMatch = gameVersionMatch || version == gameVersion;
+	});
+	return gameVersionMatch;
+}
+
+function modloaderMatch(versionArray, modloaderVersion) {
+	versionArray.forEach(version => {
+		if(/^[a-zA-Z]+$/.test(version) && version != modloaderVersion) return false;
+		return true;
+	});
+}
+
+function downloadMods() {
+	if(!downloadStarted) {
+		downloadStarted = true;
+		save_mods_lock = Object.fromEntries(dep);
+		globCallback();
+		dep.forEach((mod, modId) => {
+			getData(modId, (data) => {
+				let path = `mods/${data.name}.jar`
+				if(mods_lock.has(String(modId))) {
+					if(mods_lock.get(String(modId)).fileId === mod.fileId) return;
+					fs.unlink(path);
+				}
+				downloadFile(mod.url, path);
+			});
+		});
+	}
+}
+
+function downloadFile(url, dest) {
+	let file = fs.createWriteStream(dest);
+	console.log(`downloading... ${url}`);
+	let request = https.get(url, (response) => {
+		// check if response is success
+		if (response.statusCode !== 200) {
+			throw response.statusCode;
+		}
+
+		response.pipe(file);
+	});
+
+	// close() is async, call cb after close completes
+	file.on('finish', () => file.close());
+
+	// check for request error too
+	request.on('error', (err) => {
+		fs.unlink(dest);
+		throw err;
+	});
+
+	file.on('error', (err) => { // Handle errors
+		fs.unlink(dest);
+		throw err;
+	});
+}
+module.exports = function(saved_mods_lock, mods_lock_p, callback) {
+	var save_mods_lock = saved_mods_lock;
+	var mods_lock = mods_lock_p;
+	globCallback = callback;
+};
diff --git a/src/main.js b/src/main.js
index d886290..52c0908 100644
--- a/src/main.js
+++ b/src/main.js
@@ -1,127 +1,25 @@
-const { http, https } = require('follow-redirects');
 const jsonMinify = require("node-json-minify");
 const fs = require("fs");
-let dep = new Map();
-let config;
-let downloadStarted = false;
 switch(process.argv.length) {
 	case 3:
 		process.chdir(process.argv[2]);
 	case 2:
-		config = JSON.parse(jsonMinify(fs.readFileSync("mods.json", "utf-8")));
+		global.config = JSON.parse(jsonMinify(fs.readFileSync("mods.json", "utf-8")));
 		break;
 	default:
 		throw "unexpected argument";
 }
-config.mods.curse.forEach(mod => {
-	getData(`search?categoryId=0&gameId=432&gameVersion=${encodeURI(config.gameVersion)}&index=0&pageSize=15&searchFilter=${encodeURI(mod)}&sectionId=6&sort=2`, (result) => { // resolve projectID
-		resolveDep(result[0].id, function(){
-			for(const modFile of dep) {
-				if(mods_lock !== undefined) downloadMods();
-				let waitModsLock = setInterval(function() {
-					if(mods_lock !== undefined) {
-						clearInterval(waitModsLock);
-						downloadMods();
-					}
-				}, 1);
-			}
-		});
-	});
-});
-let mods_lock;
-fs.readFile("mods-lock.json", "utf-8", (err, data) => {
-	if(err) {
-		if(err.errno == -2) mods_lock = new Map();
-		else throw err;
-	}
-	else mods_lock = new Map(Objects.entries(JSON.parse(data)));
-});
+const modLockPath = "mods-lock.json";
+let save_mods_lock = {};
+let modsLock = JSON.parse(fs.readFileSync(modLockPath, "utf-8"));
+const numberCallback = 2;
+let callbackCounter = 0;
+require("./curse.js")(save_mods_lock.curse, modsLock.curse, finnish);
 
-var resolveDepRecursionCount = [];
-function resolveDep(modId, callback, index) {
-	if(index === undefined) index = resolveDepRecursionCount.push(0) - 1;
-	++resolveDepRecursionCount[index];
-	getData(`${modId}/files`, (files) => {
-		let rightVersion;
-		for(let i = files.length - 1; i >= 0; --i) {
-			let versionArray = files[i].gameVersion;
-			if(versionMatch(versionArray, config.gameVersion) && (versionMatch(versionArray, config.modloader) || modloaderMatch(versionArray, config.modloader))) {
-				rightVersion = files[i];
-				dep.set(modId, {fileId: rightVersion.id, url: rightVersion.downloadUrl});
-			}
-		}
-		rightVersion.dependencies.forEach(mod => {
-			resolveDep(mod.addonId, callback, index);
-		});
-		--resolveDepRecursionCount[index];
-		if(resolveDepRecursionCount[index] == 0) callback();
-	});
-}
-
-function getData(url, callback) {
-	https.get(`https://addons-ecs.forgesvc.net/api/v2/addon/${url}`, (resp) => {
-		let data = '';
-		resp.on('data', (chunk) => {
-			data += chunk;
-		});
-		resp.on("end", () => {
-			callback(JSON.parse(data));
-		});
-	});
-}
-
-function versionMatch(versionArray, gameVersion) {
-	let gameVersionMatch = false;
-	versionArray.forEach(version => {
-		gameVersionMatch = gameVersionMatch || version == gameVersion;
-	});
-	return gameVersionMatch;
-}
-
-function modloaderMatch(versionArray, modloaderVersion) {
-	versionArray.forEach(version => {
-		if(/^[a-zA-Z]+$/.test(version) && version != modloaderVersion) return false;
-		return true;
-	});
-}
-
-function downloadMods() {
-	if(!downloadStarted) {
-		downloadStarted = true;
-		dep.forEach((mod, modId) => {
-			if(mods_lock.has(modId)) {
-				console.log(3)
-				if(mods_lock.get(mod.fileId) === mod.fileId) return;
-				fs.unlink(modId + " " + mods_lock.get(mod.fileId + ".jar"));
-			}
-			downloadFile(mod.url, "mods/" + modId + " " + mod.fileId + ".jar");
+function finnish() {
+	if(++callbackCounter == numberCallback) {
+		fs.writeFile(modLockPath, JSON.stringify(save_mods_lock), (err) => {
+			if(err) throw err;
 		});
 	}
 }
-
-function downloadFile(url, dest) {
-	let file = fs.createWriteStream(dest);
-	console.log(url);
-	let request = https.get(url, (response) => {
-		// check if response is success
-		if (response.statusCode !== 200) {
-			throw response.statusCode;
-		}
-
-		response.pipe(file);
-	});
-
-	// close() is async, call cb after close completes
-	file.on('finish', () => file.close());
-
-	// check for request error too
-	request.on('error', (err) => {
-		fs.unlink(dest);
-		throw err;
-	});
-
-	file.on('error', (err) => { // Handle errors
-		fs.unlink(dest);
-		throw err;
-	});
-}