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D11772.1765293812.diff
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D11772.1765293812.diff
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diff --git a/keyserver/src/creators/farcaster-channel-tag-creator.js b/keyserver/src/creators/farcaster-channel-tag-creator.js
new file mode 100644
--- /dev/null
+++ b/keyserver/src/creators/farcaster-channel-tag-creator.js
@@ -0,0 +1,89 @@
+// @flow
+
+import uuid from 'uuid';
+
+import type {
+ CreateOrUpdateFarcasterChannelTagRequest,
+ CreateOrUpdateFarcasterChannelTagResponse,
+} from 'lib/types/community-types.js';
+import { ServerError } from 'lib/utils/errors.js';
+
+import {
+ uploadBlob,
+ assignHolder,
+ download,
+ type BlobOperationResult,
+ type BlobDownloadResult,
+} from '../services/blob.js';
+import { Viewer } from '../session/viewer.js';
+
+async function createOrUpdateFarcasterChannelTag(
+ viewer: Viewer,
+ request: CreateOrUpdateFarcasterChannelTagRequest,
+): Promise<CreateOrUpdateFarcasterChannelTagResponse> {
+ const { commCommunityID, farcasterChannelID } = request;
+
+ const blobDownload = await getFarcasterChannelTagBlob(farcasterChannelID);
+
+ if (blobDownload.found) {
+ throw new ServerError('already_in_use');
+ }
+
+ const blobHolder = uuid.v4();
+
+ const blobResult = await uploadFarcasterChannelTagBlob(
+ commCommunityID,
+ farcasterChannelID,
+ blobHolder,
+ );
+
+ if (!blobResult.success) {
+ if (blobResult.reason === 'HASH_IN_USE') {
+ throw new ServerError('already_in_use');
+ } else {
+ throw new ServerError('unknown_error');
+ }
+ }
+
+ return {
+ commCommunityID,
+ blobHolder,
+ };
+}
+
+function farcasterChannelTagBlobHash(secret: string): string {
+ return `farcaster_channel_tag_${secret}`;
+}
+
+function getFarcasterChannelTagBlob(
+ secret: string,
+): Promise<BlobDownloadResult> {
+ const hash = farcasterChannelTagBlobHash(secret);
+
+ return download(hash);
+}
+
+async function uploadFarcasterChannelTagBlob(
+ commCommunityID: string,
+ farcasterChannelID: string,
+ holder: string,
+): Promise<BlobOperationResult> {
+ const payload = {
+ commCommunityID,
+ farcasterChannelID,
+ };
+ const payloadString = JSON.stringify(payload);
+
+ const hash = farcasterChannelTagBlobHash(farcasterChannelID);
+ const blob = new Blob([payloadString]);
+
+ const uploadResult = await uploadBlob(blob, hash);
+
+ if (!uploadResult.success) {
+ return uploadResult;
+ }
+
+ return await assignHolder({ holder, hash });
+}
+
+export { createOrUpdateFarcasterChannelTag, uploadFarcasterChannelTagBlob };
diff --git a/lib/types/community-types.js b/lib/types/community-types.js
--- a/lib/types/community-types.js
+++ b/lib/types/community-types.js
@@ -16,3 +16,13 @@
+id: string,
+newCommunityInfo: CommunityInfo,
};
+
+export type CreateOrUpdateFarcasterChannelTagRequest = {
+ +commCommunityID: string,
+ +farcasterChannelID: string,
+};
+
+export type CreateOrUpdateFarcasterChannelTagResponse = {
+ +commCommunityID: string,
+ +blobHolder: string,
+};

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