Storage adapter should be document-agnostic.

Got a blob return a key; get a key return a blob.

packages/gallery/src/services/b2.js

@@ -91,27 +91,24 @@ export const B2Adapter = function(b2apikey, b2secret, b2bucket) {
 			});
 		},
 		save: async function saveAttachment(blob) {
-			try {
 			const uploadAuth = await uploadAuthorization();
 			const digest = await sha1(await blobToArrayBuffer(blob));
 			const res = await fetch(uploadAuth.uploadUrl, {
 				method: 'POST',
 				headers: await headers({
 					Authorization: uploadAuth.authorizationToken,
-						'X-Bz-File-Name': encodeURIComponent(blob.name),
+					'X-Bz-File-Name': encodeURIComponent(blob.name || digest),
 					'Content-Type': blob.type,
 					'Content-Length': blob.size,
 					'X-Bz-Content-Sha1': digest
 				}),
 				body: blob
 			});
+			const data = await res.json();
 			return {
-					ok: true,
-					id: await res.json()
+				fileId: data.fileId,
+				fileName: data.fileName
 			};
-			} catch (e) {
-				return { ok: false, error: e };
-			}
 		}
 	});
 };

packages/gallery/src/utils/attachmentProxy.js

@@ -70,8 +70,9 @@ export function PouchDBAttachmentProxy({ save, getFn, remove }) {
 
 			return Promise.all(
 				attachments.map(([doc, attName, blob]) =>
-					save.call(this, blob).then(resData => {
-						if (resData && resData.ok) {
+					save
+						.call(this, blob)
+						.then(resData => {
 							deepAssign(doc, {
 								_attachments: {
 									[attName]: {
@@ -80,10 +81,8 @@ export function PouchDBAttachmentProxy({ save, getFn, remove }) {
 									}
 								}
 							});
-						} else {
-							error(`Failed to save attachment ${doc._id}[${attName}]`, resData);
-						}
 						})
+						.catch(e => error(`Failed to save attachment ${doc._id}[${attName}]`, resData))
 				)
 			).then(() => {
 				return pouchBulkDocs.call(this, ...args);