PM-20532 - WIP on Send Token Svc

libs/common/src/auth/send-access/abstractions/send-token.service.ts

@@ -0,0 +1,14 @@
+export abstract class SendTokenService {
+  // TODO: talk with Tools about what expected behavior is for expired access tokens.
+  // Do we implement any local TTL or do we just rely on the server to return a 401 and then we handle that in the api service?
+
+  // SendAccessTokens need to be stored in session storage once retrieved.
+  // All SendAccessTokens are scoped to a specific send id so all getting and setting should accept a send id.
+
+  // TODO: should this abstraction have separate methods for requesting an access token from the server
+  // and for getting the access token from storage? Or should it just be one method that does both?
+
+  // Get the access token for a specific send id.
+  abstract getSendAccessToken: (sendId: string) => Promise<string | null>;
+  abstract setSendAccessToken: (sendId: string, token: string) => Promise<void>;
+}