diff --git a/.gitignore b/.gitignore
index 3429ee7..18c3786 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,3 @@
 node_modules/
 yarn.lock
-*.js
 private.pem
diff --git a/entry.js b/entry.js
new file mode 100644
index 0000000..e69de29
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..d158cdb
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,36 @@
+/// <reference types="node" />
+export interface File {
+    _id: string;
+    type: "binary" | "text";
+    name: string;
+    time: string;
+    preview: string;
+    version: string;
+}
+export interface History {
+    file: File;
+    history: File[];
+}
+export default class SecureFile {
+    private Server;
+    private Username;
+    private PrivateKey;
+    constructor(server: string, username: string, private_key: string);
+    private getCode();
+    private makeRequest(endpoint, method, query, body);
+    list(): Promise<File[]>;
+    create(name: string, data: Buffer, type: "text" | "binary", preview?: Buffer): Promise<File>;
+    get(id: string, version?: string): Promise<Buffer>;
+    update(id: string, data: Buffer, preview?: Buffer): Promise<File>;
+    delete(id: string): Promise<boolean>;
+    history(id: string): Promise<History>;
+}
+export declare class Unauthorized extends Error {
+    constructor();
+}
+export declare class NotFound extends Error {
+    constructor();
+}
+export declare class BadRequest extends Error {
+    constructor();
+}
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..1dc012a
--- /dev/null
+++ b/index.js
@@ -0,0 +1,104 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const rsa = require("node-rsa");
+const node_fetch_1 = require("node-fetch");
+class SecureFile {
+    constructor(server, username, private_key) {
+        this.Server = server;
+        this.Username = username;
+        this.PrivateKey = private_key;
+    }
+    async getCode() {
+        let code_res = await node_fetch_1.default(this.Server + "/code?username=" + this.Username);
+        //ToDo check status Codes
+        let code = (await code_res.json()).code;
+        let r = new rsa(this.PrivateKey, "pkcs1-pem");
+        return { code: code, signature: r.sign(code).toString("base64") };
+    }
+    async makeRequest(endpoint, method, query, body) {
+        let code = await this.getCode();
+        query.code = code.code;
+        query.signature = code.signature;
+        let query_str = "?";
+        let first = true;
+        for (let key in query) {
+            if (!first)
+                query_str += "&";
+            query_str += encodeURIComponent(key) + "=" + encodeURIComponent(query[key]);
+            first = false;
+        }
+        return await node_fetch_1.default(this.Server + endpoint + query_str, { method: method, body: body });
+    }
+    async list() {
+        let res = await this.makeRequest("/files", "GET", {}, undefined);
+        statusParser(res);
+        return await res.json();
+    }
+    async create(name, data, type, preview) {
+        let res = await this.makeRequest("/files", "POST", { type: type, name: name, preview: preview }, data);
+        statusParser(res);
+        return res.json();
+    }
+    async get(id, version) {
+        let res;
+        if (typeof version === "string") {
+            res = await this.makeRequest(`/files/${id}/history/${version}`, "GET", {}, undefined);
+        }
+        else {
+            res = await this.makeRequest("/files/" + id, "GET", {}, undefined);
+        }
+        statusParser(res);
+        return res.buffer();
+    }
+    async update(id, data, preview) {
+        let put = {};
+        if (preview)
+            put.preview = preview;
+        let res = await this.makeRequest("/files/" + id, "PUT", put, data);
+        statusParser(res);
+        return res.json();
+    }
+    async delete(id) {
+        let res = await this.makeRequest("/files/" + id, "DELETE", {}, undefined);
+        statusParser(res);
+        return res.json();
+    }
+    async history(id) {
+        let res = await this.makeRequest(`/files/${id}/history`, "GET", {}, undefined);
+        statusParser(res);
+        return res.json();
+    }
+}
+exports.default = SecureFile;
+class Unauthorized extends Error {
+    constructor() {
+        super("Not authorized");
+    }
+}
+exports.Unauthorized = Unauthorized;
+class NotFound extends Error {
+    constructor() {
+        super("Not found");
+    }
+}
+exports.NotFound = NotFound;
+class BadRequest extends Error {
+    constructor() {
+        super("Bad request");
+    }
+}
+exports.BadRequest = BadRequest;
+function statusParser(res) {
+    if (res.status !== 200) {
+        switch (res.status) {
+            case 400:
+                throw new BadRequest();
+            case 404:
+                throw new NotFound();
+            case 403:
+                throw new Unauthorized();
+            default:
+                throw new Error(res.statusText);
+        }
+    }
+}
diff --git a/package.json b/package.json
index 285c18d..3b3d165 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,10 @@
 {
-   "name": "SecureFileWrapper",
-   "version": "1.0.0",
+   "name": "secure-file-wrapper",
+   "version": "1.0.1",
    "main": "index.js",
    "author": "Fabian Stamm <dev@fabianstamm.de>",
    "license": "MIT",
+   "types": "index.d.ts",
    "scripts": {
       "build": "tsc",
       "test": "nodeunit test.js"
diff --git a/test.d.ts b/test.d.ts
new file mode 100644
index 0000000..e69de29
diff --git a/test.js b/test.js
new file mode 100644
index 0000000..0dae075
--- /dev/null
+++ b/test.js
@@ -0,0 +1,81 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const index_1 = require("./index");
+const fs_1 = require("fs");
+const buffer_1 = require("buffer");
+let sf;
+const testname = "ouiavgbsop687463743";
+const testdata = new buffer_1.Buffer("Ich bin ein Test");
+const newTestData = new buffer_1.Buffer("neue test daten");
+const testprev = new buffer_1.Buffer("Ich bin...");
+let testid;
+let testver;
+let testver2;
+module.exports = {
+    setUp: function (finished) {
+        let pk = fs_1.readFileSync("./private.pem");
+        sf = new index_1.default("http://localhost:3005", "test", pk.toString("utf8"));
+        finished();
+    },
+    create: async function (test) {
+        test.expect(2);
+        let res = await sf.create(testname, testdata, "text", testprev);
+        test.ok(res);
+        test.ok(res._id);
+        testid = res._id;
+        testver = res.version;
+        test.done();
+    },
+    get: async function (test) {
+        test.expect(2);
+        let res = await sf.get(testid);
+        test.ok(res);
+        test.equal(res.toString(), testdata.toString());
+        test.done();
+    },
+    list: async function (test) {
+        test.expect(4);
+        let res = await sf.list();
+        console.log(res);
+        test.ok(res);
+        test.ok(Array.isArray(res), "Is from type Array");
+        test.ok(res.length > 0, "Do elements exist?");
+        res.forEach(e => {
+            if (e._id === testid) {
+                test.ok(true, "Element is in List");
+            }
+        });
+        test.done();
+    },
+    update: async function (test) {
+        test.expect(5);
+        let res = await sf.update(testid, newTestData);
+        test.ok(res);
+        test.ok(res._id);
+        test.notEqual(res.version, testver, "Is new version_id generated?");
+        testver2 = res.version;
+        let res2 = await sf.get(testid);
+        test.ok(res2);
+        test.equal(res2.toString(), newTestData.toString(), "Is fetched data the updated?");
+        test.done();
+    },
+    history: async function (test) {
+        test.expect(7);
+        let his = await sf.history(testid);
+        test.ok(his);
+        test.ok(his.file);
+        test.ok(his.history);
+        test.equal(his.history.length, 1);
+        test.equal(his.history[0].version, testver);
+        test.equal(his.file.version, testver2, "Is correct version");
+        let arch = await sf.get(testid, testver);
+        test.equal(arch.toString(), testdata.toString(), "Is old version data correct");
+        test.done();
+    },
+    delete: async function (test) {
+        test.expect(1);
+        let res = await sf.delete(testid);
+        test.ok(res);
+        test.done();
+    }
+};
diff --git a/tsconfig.json b/tsconfig.json
index 6b23ea0..dbeee88 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,14 +1,13 @@
 {
    "compilerOptions": {
       /* Basic Options */
-      "watch": true,
       "target": "es2017", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
       "module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
       // "lib": [],                             /* Specify library files to be included in the compilation:  */
       // "allowJs": true,                       /* Allow javascript files to be compiled. */
       // "checkJs": true,                       /* Report errors in .js files. */
       // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
-      // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+      "declaration": true, /* Generates corresponding '.d.ts' file. */
       // "sourceMap": true,                     /* Generates corresponding '.map' file. */
       // "outFile": "./",                       /* Concatenate and emit output to single file. */
       // "outDir": "./",                        /* Redirect output structure to the directory. */