feat(core): update session, security system and QR exchange

- Removed session creation and Lightning payment logic
- Refactored security system:
  * no more restrictions
  * all systems enabled on session creation
- Improved QR code exchange for mobile devices

node_modules/html5-qrcode/src/storage.ts

@@ -0,0 +1,72 @@
+/**
+ * @fileoverview
+ * Core storage related APIs.
+ * 
+ * @author mebjas <minhazav@gmail.com>
+ * 
+ * The word "QR Code" is registered trademark of DENSO WAVE INCORPORATED
+ * http://www.denso-wave.com/qrcode/faqpatent-e.html
+ */
+
+interface PersistedData {
+    hasPermission: boolean;
+    lastUsedCameraId: string | null;
+}
+
+class PersistedDataFactory {
+    static createDefault(): PersistedData {
+        return {
+            hasPermission: false,
+            lastUsedCameraId: null
+        };
+    }
+}
+
+export class PersistedDataManager {
+
+    private data: PersistedData = PersistedDataFactory.createDefault();
+    private static LOCAL_STORAGE_KEY: string = "HTML5_QRCODE_DATA";
+
+    constructor() {
+        let data = localStorage.getItem(PersistedDataManager.LOCAL_STORAGE_KEY);
+        if (!data) {
+            this.reset();
+        } else {
+            this.data = JSON.parse(data);
+        }
+    }
+
+    public hasCameraPermissions(): boolean {
+        return this.data.hasPermission;
+    }
+
+    public getLastUsedCameraId(): string | null {
+        return this.data.lastUsedCameraId;
+    }
+
+    public setHasPermission(hasPermission: boolean) {
+        this.data.hasPermission = hasPermission;
+        this.flush();
+    }
+
+    public setLastUsedCameraId(lastUsedCameraId: string) {
+        this.data.lastUsedCameraId = lastUsedCameraId;
+        this.flush();
+    }
+
+    public resetLastUsedCameraId() {
+        this.data.lastUsedCameraId = null;
+        this.flush();
+    }
+
+    public reset() {
+        this.data = PersistedDataFactory.createDefault();
+        this.flush();
+    }
+
+    private flush(): void {
+        localStorage.setItem(
+            PersistedDataManager.LOCAL_STORAGE_KEY,
+            JSON.stringify(this.data));
+    }
+}