Support for single-attachment delete synced across devices

ts/test-both/helpers/fakeAttachment.ts

@@ -1,6 +1,8 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
+import { v4 as generateUuid } from 'uuid';
+
 import type {
   AttachmentType,
   AttachmentDraftType,
@@ -33,6 +35,7 @@ export const fakeDraftAttachment = (
   overrides: Partial<AttachmentDraftType> = {}
 ): AttachmentDraftType => ({
   pending: false,
+  clientUuid: generateUuid(),
   contentType: IMAGE_JPEG,
   path: 'file.jpg',
   size: 10304,

ts/test-both/processDataMessage_test.ts

@@ -3,6 +3,7 @@
 
 import { assert } from 'chai';
 import Long from 'long';
+import { v4 as generateUuid } from 'uuid';
 
 import {
   processDataMessage,
@@ -12,14 +13,17 @@ import type { ProcessedAttachment } from '../textsecure/Types.d';
 import { SignalService as Proto } from '../protobuf';
 import { IMAGE_GIF, IMAGE_JPEG } from '../types/MIME';
 import { generateAci } from '../types/ServiceId';
+import { uuidToBytes } from '../util/uuidToBytes';
 
 const ACI_1 = generateAci();
 const FLAGS = Proto.DataMessage.Flags;
 
 const TIMESTAMP = Date.now();
+const CLIENT_UUID = generateUuid();
 
 const UNPROCESSED_ATTACHMENT: Proto.IAttachmentPointer = {
   cdnId: Long.fromNumber(123),
+  clientUuid: uuidToBytes(CLIENT_UUID),
   key: new Uint8Array([1, 2, 3]),
   digest: new Uint8Array([4, 5, 6]),
   contentType: IMAGE_GIF,
@@ -28,6 +32,7 @@ const UNPROCESSED_ATTACHMENT: Proto.IAttachmentPointer = {
 
 const PROCESSED_ATTACHMENT: ProcessedAttachment = {
   cdnId: '123',
+  clientUuid: CLIENT_UUID,
   key: 'AQID',
   digest: 'BAUG',
   contentType: IMAGE_GIF,

ts/test-both/state/ducks/composer_test.ts

@@ -4,6 +4,7 @@
 import { assert } from 'chai';
 import * as sinon from 'sinon';
 import { noop } from 'lodash';
+import { v4 as generateUuid } from 'uuid';
 
 import type { ReduxActions } from '../../../state/types';
 import {
@@ -68,6 +69,7 @@ describe('both/state/ducks/composer', () => {
       const attachments: Array<AttachmentDraftType> = [
         {
           contentType: IMAGE_JPEG,
+          clientUuid: generateUuid(),
           pending: true,
           size: 2433,
           path: 'image.jpg',