diff --git a/lib/actions/upload-actions.js b/lib/actions/upload-actions.js
index abd64d5b3..0a5b80bb5 100644
--- a/lib/actions/upload-actions.js
+++ b/lib/actions/upload-actions.js
@@ -1,250 +1,251 @@
 // @flow
 
 import uuid from 'uuid';
 
 import blobService from '../facts/blob-service.js';
-import type { Shape } from '../types/core.js';
 import type { UploadMultimediaResult, Dimensions } from '../types/media-types';
 import { extractKeyserverIDFromID } from '../utils/action-utils.js';
 import { toBase64URL } from '../utils/base64.js';
 import {
   blobServiceUploadHandler,
   type BlobServiceUploadHandler,
 } from '../utils/blob-service-upload.js';
 import { makeBlobServiceEndpointURL } from '../utils/blob-service.js';
 import type { CallServerEndpoint } from '../utils/call-server-endpoint.js';
 import { getMessageForException } from '../utils/errors.js';
 import { useKeyserverCall } from '../utils/keyserver-call.js';
 import type { CallKeyserverEndpoint } from '../utils/keyserver-call.js';
 import { handleHTTPResponseError } from '../utils/services-utils.js';
 import { type UploadBlob } from '../utils/upload-blob.js';
 
-export type MultimediaUploadCallbacks = Shape<{
-  onProgress: (percent: number) => void,
-  abortHandler: (abort: () => void) => void,
-  uploadBlob: UploadBlob,
-  blobServiceUploadHandler: BlobServiceUploadHandler,
-  timeout: ?number,
-}>;
-export type MultimediaUploadExtras = Shape<{
-  ...Dimensions,
-  loop: boolean,
-  encryptionKey: string,
-  thumbHash: ?string,
+export type MultimediaUploadCallbacks = Partial<{
+  +onProgress: (percent: number) => void,
+  +abortHandler: (abort: () => void) => void,
+  +uploadBlob: UploadBlob,
+  +blobServiceUploadHandler: BlobServiceUploadHandler,
+  +timeout: ?number,
 }>;
+export type MultimediaUploadExtras = $ReadOnly<
+  Partial<{
+    ...Dimensions,
+    +loop: boolean,
+    +encryptionKey: string,
+    +thumbHash: ?string,
+  }>,
+>;
 
 const uploadMultimedia =
   (
     callServerEndpoint: CallServerEndpoint,
   ): ((
     multimedia: Object,
     extras: MultimediaUploadExtras,
     callbacks?: MultimediaUploadCallbacks,
   ) => Promise<UploadMultimediaResult>) =>
   async (multimedia, extras, callbacks) => {
     const onProgress = callbacks && callbacks.onProgress;
     const abortHandler = callbacks && callbacks.abortHandler;
     const uploadBlob = callbacks && callbacks.uploadBlob;
 
     const stringExtras: { [string]: string } = {};
     if (extras.height !== null && extras.height !== undefined) {
       stringExtras.height = extras.height.toString();
     }
     if (extras.width !== null && extras.width !== undefined) {
       stringExtras.width = extras.width.toString();
     }
     if (extras.loop) {
       stringExtras.loop = '1';
     }
     if (extras.encryptionKey) {
       stringExtras.encryptionKey = extras.encryptionKey;
     }
     if (extras.thumbHash) {
       stringExtras.thumbHash = extras.thumbHash;
     }
 
     // also pass MIME type if available
     if (multimedia.type && typeof multimedia.type === 'string') {
       stringExtras.mimeType = multimedia.type;
     }
 
     const response = await callServerEndpoint(
       'upload_multimedia',
       {
         ...stringExtras,
         multimedia: [multimedia],
       },
       {
         onProgress,
         abortHandler,
         blobUpload: uploadBlob ? uploadBlob : true,
       },
     );
     const [uploadResult] = response.results;
     return {
       id: uploadResult.id,
       uri: uploadResult.uri,
       dimensions: uploadResult.dimensions,
       mediaType: uploadResult.mediaType,
       loop: uploadResult.loop,
     };
   };
 
 export type DeleteUploadInput = {
   +id: string,
   +keyserverOrThreadID: string,
 };
 
 const updateMultimediaMessageMediaActionType =
   'UPDATE_MULTIMEDIA_MESSAGE_MEDIA';
 
 const deleteUpload =
   (
     callKeyserverEndpoint: CallKeyserverEndpoint,
   ): ((input: DeleteUploadInput) => Promise<void>) =>
   async input => {
     const { id, keyserverOrThreadID } = input;
     const keyserverID = extractKeyserverIDFromID(keyserverOrThreadID);
     const requests = { [keyserverID]: { id } };
     await callKeyserverEndpoint('delete_upload', requests);
   };
 
 function useDeleteUpload(): (input: DeleteUploadInput) => Promise<void> {
   return useKeyserverCall(deleteUpload);
 }
 
 export type BlobServiceUploadFile =
   | { +type: 'file', +file: File }
   | {
       +type: 'uri',
       +uri: string,
       +filename: string,
       +mimeType: string,
     };
 
 export type BlobServiceUploadInput = {
   +blobInput: BlobServiceUploadFile,
   +blobHash: string,
   +encryptionKey: string,
   +dimensions: ?Dimensions,
   +thumbHash?: ?string,
   +loop?: boolean,
 };
 
 export type BlobServiceUploadResult = {
   ...UploadMultimediaResult,
   blobHolder: ?string,
 };
 
 export type BlobServiceUploadAction = (input: {
   +uploadInput: BlobServiceUploadInput,
   +keyserverOrThreadID: string,
   +callbacks?: MultimediaUploadCallbacks,
 }) => Promise<BlobServiceUploadResult>;
 
 const blobServiceUpload =
   (callKeyserverEndpoint: CallKeyserverEndpoint): BlobServiceUploadAction =>
   async input => {
     const { uploadInput, callbacks, keyserverOrThreadID } = input;
     const { encryptionKey, loop, dimensions, thumbHash, blobInput } =
       uploadInput;
     const blobHolder = uuid.v4();
     const blobHash = toBase64URL(uploadInput.blobHash);
 
     // 1. Assign new holder for blob with given blobHash
     let blobAlreadyExists: boolean;
     try {
       const assignHolderEndpoint = blobService.httpEndpoints.ASSIGN_HOLDER;
       const assignHolderResponse = await fetch(
         makeBlobServiceEndpointURL(assignHolderEndpoint),
         {
           method: assignHolderEndpoint.method,
           body: JSON.stringify({
             holder: blobHolder,
             blob_hash: blobHash,
           }),
           headers: {
             'content-type': 'application/json',
           },
         },
       );
       handleHTTPResponseError(assignHolderResponse);
       const { data_exists: dataExistsResponse } =
         await assignHolderResponse.json();
       blobAlreadyExists = dataExistsResponse;
     } catch (e) {
       throw new Error(
         `Failed to assign holder: ${
           getMessageForException(e) ?? 'unknown error'
         }`,
       );
     }
 
     // 2. Upload blob contents if blob doesn't exist
     if (!blobAlreadyExists) {
       const uploadEndpoint = blobService.httpEndpoints.UPLOAD_BLOB;
       let blobServiceUploadCallback = blobServiceUploadHandler;
       if (callbacks && callbacks.blobServiceUploadHandler) {
         blobServiceUploadCallback = callbacks.blobServiceUploadHandler;
       }
       try {
         await blobServiceUploadCallback(
           makeBlobServiceEndpointURL(uploadEndpoint),
           uploadEndpoint.method,
           {
             blobHash,
             blobInput,
           },
           { ...callbacks },
         );
       } catch (e) {
         throw new Error(
           `Failed to upload blob: ${
             getMessageForException(e) ?? 'unknown error'
           }`,
         );
       }
     }
 
     // 3. Upload metadata to keyserver
     const keyserverID = extractKeyserverIDFromID(keyserverOrThreadID);
     const requests = {
       [keyserverID]: {
         blobHash,
         blobHolder,
         encryptionKey,
         filename:
           blobInput.type === 'file' ? blobInput.file.name : blobInput.filename,
         mimeType:
           blobInput.type === 'file' ? blobInput.file.type : blobInput.mimeType,
         loop,
         thumbHash,
         ...dimensions,
       },
     };
     const responses = await callKeyserverEndpoint(
       'upload_media_metadata',
       requests,
     );
     const response = responses[keyserverID];
 
     return {
       id: response.id,
       uri: response.uri,
       mediaType: response.mediaType,
       dimensions: response.dimensions,
       loop: response.loop,
       blobHolder,
     };
   };
 
 function useBlobServiceUpload(): BlobServiceUploadAction {
   return useKeyserverCall(blobServiceUpload);
 }
 
 export {
   uploadMultimedia,
   useBlobServiceUpload,
   updateMultimediaMessageMediaActionType,
   useDeleteUpload,
 };