Handle new rate limiting info from CDSI

ts/textsecure/cds/RateLimitedError.ts

@@ -0,0 +1,23 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+export type RateLimitedErrorPayloadType = Readonly<{
+  // eslint-disable-next-line camelcase
+  retry_after?: number;
+}>;
+
+export class RateLimitedError extends Error {
+  public readonly retryAfterSecs: number;
+
+  // eslint-disable-next-line camelcase
+  constructor({ retry_after }: RateLimitedErrorPayloadType) {
+    super(
+      'RateLimitedError: got 4008 close code from CDSI, ' +
+        // eslint-disable-next-line camelcase
+        `retry_after=${retry_after}`
+    );
+
+    // eslint-disable-next-line camelcase
+    this.retryAfterSecs = retry_after ?? 0;
+  }
+}