First pass at user verification

libs/common/src/platform/abstractions/fido2/fido2-authenticator.service.abstraction.ts

@@ -33,6 +33,7 @@ export abstract class Fido2AuthenticatorService<ParentWindowReference> {
     params: Fido2AuthenticatorGetAssertionParams,
     window: ParentWindowReference,
     abortController?: AbortController,
+    transactionContext?: ArrayBuffer,
   ): Promise<Fido2AuthenticatorGetAssertionResult>;
 
   /**

libs/common/src/platform/abstractions/fido2/fido2-user-interface.service.abstraction.ts

@@ -71,6 +71,7 @@ export abstract class Fido2UserInterfaceService<ParentWindowReference> {
     fallbackSupported: boolean,
     window: ParentWindowReference,
     abortController?: AbortController,
+    transactionContext?: ArrayBuffer,
   ): Promise<Fido2UserInterfaceSession>;
 }
 

libs/common/src/platform/services/fido2/fido2-authenticator.service.ts

@@ -230,11 +230,13 @@ export class Fido2AuthenticatorService<ParentWindowReference>
     params: Fido2AuthenticatorGetAssertionParams,
     window: ParentWindowReference,
     abortController?: AbortController,
+    transactionContext?: ArrayBuffer,
   ): Promise<Fido2AuthenticatorGetAssertionResult> {
     const userInterfaceSession = await this.userInterface.newSession(
       params.fallbackSupported,
       window,
       abortController,
+      transactionContext,
     );
     try {
       if (