feat: add google-gax status to exports (#912)

dev/src/index.ts

@@ -91,6 +91,7 @@ export {
   Precondition,
   SetOptions,
 } from './types';
+export {Status as GrpcStatus} from 'google-gax';
 
 const libVersion = require('../../package.json').version;
 setLibVersion(libVersion);

dev/test/typescript.ts

@@ -34,6 +34,7 @@ import SetOptions = FirebaseFirestore.SetOptions;
 import FirestoreDataConverter = FirebaseFirestore.FirestoreDataConverter;
 import Timestamp = FirebaseFirestore.Timestamp;
 import Settings = FirebaseFirestore.Settings;
+import GrpcStatus = FirebaseFirestore.GrpcStatus;
 
 // This test verifies the Typescript typings and is not meant for execution.
 xdescribe('firestore.d.ts', () => {
@@ -352,4 +353,8 @@ xdescribe('firestore.d.ts', () => {
     const seconds: number = timestamp.seconds;
     const nanoseconds: number = timestamp.nanoseconds;
   });
+
+  it('has typings for GrpcStatus', () => {
+    const status = GrpcStatus.ABORTED;
+  });
 });

types/firestore.d.ts

@@ -1452,6 +1452,29 @@ declare namespace FirebaseFirestore {
    * API and the underlying Firestore v1 RPCs.
    */
   export const v1: {FirestoreClient: any, FirestoreAdminClient: any};
+
+  /**
+   * Status codes returned by Firestore's gRPC calls.
+   */
+  export enum GrpcStatus {
+    OK = 0,
+    CANCELLED = 1,
+    UNKNOWN = 2,
+    INVALID_ARGUMENT = 3,
+    DEADLINE_EXCEEDED = 4,
+    NOT_FOUND = 5,
+    ALREADY_EXISTS = 6,
+    PERMISSION_DENIED = 7,
+    RESOURCE_EXHAUSTED = 8,
+    FAILED_PRECONDITION = 9,
+    ABORTED = 10,
+    OUT_OF_RANGE = 11,
+    UNIMPLEMENTED = 12,
+    INTERNAL = 13,
+    UNAVAILABLE = 14,
+    DATA_LOSS = 15,
+    UNAUTHENTICATED = 16
+  }
 }
 
 declare module '@google-cloud/firestore' {