try catch nodeRT module via require

src/abstractions/biometric.main.ts

@@ -1,4 +1,5 @@
 export abstract class BiometricMain {
+    isError: boolean;
     init: () => Promise<void>;
     supportsBiometric: () => Promise<boolean>;
     requestCreate: () => Promise<boolean>;

src/electron/biometric.darwin.main.ts

@@ -6,6 +6,8 @@ import { ConstantsService } from '../services';
 import { ElectronConstants } from './electronConstants';
 
 export default class BiometricDarwinMain implements BiometricMain {
+    isError: boolean = false;
+
     constructor(private storageService: StorageService, private i18nservice: I18nService) {}
 
     async init() {

src/electron/biometric.windows.main.ts

@@ -1,10 +1,3 @@
-import * as util from 'util';
-
-import {
-    UserConsentVerificationResult,
-    UserConsentVerifier,
-    UserConsentVerifierAvailability,
-} from '@nodert-win10-rs4/windows.security.credentials.ui';
 import { I18nService, StorageService } from '../abstractions';
 
 import { ipcMain } from 'electron';
@@ -12,19 +5,23 @@ import { BiometricMain } from '../abstractions/biometric.main';
 import { ConstantsService } from '../services';
 import { ElectronConstants } from './electronConstants';
 
-const requestVerification: any = util.promisify(UserConsentVerifier.requestVerificationAsync);
-const checkAvailability: any = util.promisify(UserConsentVerifier.checkAvailabilityAsync);
-
-const AllowedAvailabilities = [
-    UserConsentVerifierAvailability.available,
-    UserConsentVerifierAvailability.deviceBusy,
-];
-
 export default class BiometricWindowsMain implements BiometricMain {
-    constructor(private storageService: StorageService, private i18nservice: I18nService) {}
+    isError: boolean = false;
+    
+    private windowsSecurityCredentialsUiModule: any;
+
+    constructor(private storageService: StorageService, private i18nservice: I18nService) { }
 
     async init() {
-        this.storageService.save(ElectronConstants.enableBiometric, await this.supportsBiometric());
+        this.windowsSecurityCredentialsUiModule = this.getWindowsSecurityCredentialsUiModule();
+        let supportsBiometric = false;
+        try {
+            supportsBiometric = await this.supportsBiometric();
+        } catch {
+            // store error state so we can let the user know on the settings page
+            this.isError = true;
+        }
+        this.storageService.save(ElectronConstants.enableBiometric, supportsBiometric);
         this.storageService.save(ConstantsService.biometricText, 'unlockWithWindowsHello');
 
         ipcMain.on('biometric', async (event: any, message: any) => {
@@ -33,14 +30,72 @@ export default class BiometricWindowsMain implements BiometricMain {
     }
 
     async supportsBiometric(): Promise<boolean> {
-        const availability = await checkAvailability();
+        const availability = await this.checkAvailabilityAsync();
 
-        return AllowedAvailabilities.includes(availability);
+        return this.getAllowedAvailabilities().includes(availability);
     }
 
     async requestCreate(): Promise<boolean> {
-        const verification = await requestVerification(this.i18nservice.t('windowsHelloConsentMessage'));
+        const module = this.getWindowsSecurityCredentialsUiModule();
+        if (module == null) {
+            return false;
+        }
 
-        return verification === UserConsentVerificationResult.verified;
+        const verification = await this.requestVerificationAsync(this.i18nservice.t('windowsHelloConsentMessage'));
+
+        return verification === module.UserConsentVerificationResult.verified;
+    }
+
+    getWindowsSecurityCredentialsUiModule(): any {
+        try {
+            return null;
+            /*
+            return this._windowsSecurityCredentialsUiModule ||
+                require('@nodert-win10-rs4/windows.security.credentials.ui');
+                */
+        } catch {
+            this.isError = true;
+        }
+    }
+
+    async checkAvailabilityAsync(): Promise<any> {
+        const module = this.getWindowsSecurityCredentialsUiModule();
+        if (module != null) {
+            return new Promise((resolve, reject) => {
+                module.UserConsentVerifier.checkAvailabilityAsync((error: Error, result: any) => {
+                    if (error) {
+                        return resolve(null);
+                    }
+                    return resolve(result);
+                });
+            });
+        }
+        return Promise.resolve(null);
+    }
+
+    async requestVerificationAsync(message: string): Promise<any> {
+        const module = this.getWindowsSecurityCredentialsUiModule();
+        if (module != null) {
+            return new Promise((resolve, reject) => {
+                module.UserConsentVerifier.requestVerificationAsync(message, (error: Error, result: any) => {
+                    if (error) {
+                        return resolve(null);
+                    }
+                    return resolve(result);
+                });
+            });
+        }
+        return Promise.resolve(null);
+    }
+
+    getAllowedAvailabilities(): any[] {
+        const module = this.getWindowsSecurityCredentialsUiModule();
+        if (module != null) {
+            return [
+                module.UserConsentVerifierAvailability.available,
+                module.UserConsentVerifierAvailability.deviceBusy,
+            ];
+        }
+        return [];
     }
 }

src/globals.d.ts

@@ -1,104 +1,3 @@
 declare function escape(s: string): string;
 declare function unescape(s: string): string;
 declare module 'duo_web_sdk';
-
-/* tslint:disable */
-declare module '@nodert-win10-rs4/windows.security.credentials.ui' {
-    export enum AuthenticationProtocol {
-        basic,
-        digest,
-        ntlm,
-        kerberos,
-        negotiate,
-        credSsp,
-        custom,
-    }
-
-    export enum CredentialSaveOption {
-        unselected,
-        selected,
-        hidden,
-    }
-
-    export enum UserConsentVerifierAvailability {
-        available,
-        deviceNotPresent,
-        notConfiguredForUser,
-        disabledByPolicy,
-        deviceBusy,
-    }
-
-    export enum UserConsentVerificationResult {
-        verified,
-        deviceNotPresent,
-        notConfiguredForUser,
-        disabledByPolicy,
-        deviceBusy,
-        retriesExhausted,
-        canceled,
-    }
-
-    export class CredentialPickerOptions {
-        targetName: String;
-        previousCredential: Object;
-        message: String;
-        errorCode: Number;
-        customAuthenticationProtocol: String;
-        credentialSaveOption: CredentialSaveOption;
-        caption: String;
-        callerSavesCredential: Boolean;
-        authenticationProtocol: AuthenticationProtocol;
-        alwaysDisplayDialog: Boolean;
-        constructor();
-    }
-
-    export class CredentialPickerResults {
-        credential: Object;
-        credentialDomainName: String;
-        credentialPassword: String;
-        credentialSaveOption: CredentialSaveOption;
-        credentialSaved: Boolean;
-        credentialUserName: String;
-        errorCode: Number;
-        constructor();
-    }
-
-    export class CredentialPicker {
-        constructor();
-
-        static pickAsync(
-            options: CredentialPickerOptions,
-            callback: (error: Error, result: CredentialPickerResults) => void
-        ): void;
-        static pickAsync(
-            targetName: String,
-            message: String,
-            callback: (error: Error, result: CredentialPickerResults) => void
-        ): void;
-        static pickAsync(
-            targetName: String,
-            message: String,
-            caption: String,
-            callback: (error: Error, result: CredentialPickerResults) => void
-        ): void;
-    }
-
-    export class UserConsentVerifier {
-        constructor();
-
-        static checkAvailabilityAsync(
-            callback: (
-                error: Error,
-                result: UserConsentVerifierAvailability
-            ) => void
-        ): void;
-
-        static requestVerificationAsync(
-            message: String,
-            callback: (
-                error: Error,
-                result: UserConsentVerificationResult
-            ) => void
-        ): void;
-    }
-}