slices.network
Highly ambitious ATProtocol AppView service and sdks
chadtmiller.com
add new frontend client using graphql and relay, get graphql schema at feature parity with the xrpc endpoints
1interface BlobRef {
2 $type: "blob";
3 ref: {
4 $link: string;
5 };
6 mimeType?: string;
7 size?: number;
8}
9
10/**
11 * Check if value is a blob reference
12 */
13export function isBlobRef(value: unknown): value is BlobRef {
14 return (
15 typeof value === "object" &&
16 value !== null &&
17 "$type" in value &&
18 value.$type === "blob" &&
19 "ref" in value &&
20 typeof value.ref === "object" &&
21 value.ref !== null &&
22 "$link" in value.ref &&
23 typeof value.ref.$link === "string"
24 );
25}
26
27/**
28 * Convert blob ref to CDN URL
29 */
30export function blobRefToCdnUrl(
31 did: string,
32 blobRef: BlobRef,
33 preset: "avatar" | "banner" | "feed_thumbnail" | "feed_fullsize" = "feed_fullsize",
34 cdnBaseUrl = "https://cdn.bsky.app/img"
35): string {
36 const cid = blobRef.ref.$link;
37 return `${cdnBaseUrl}/${preset}/plain/${did}/${cid}@jpeg`;
38}