Function checkRemoteVersion

src/core/sync.ts:432–441

(
  walletAddress: string
)

 * Returns the remote version, or null if no shards exist.
 */
export async function checkRemoteVersion(
  walletAddress: string
): Promise<number | null> {
  const shards = await queryShards(walletAddress);
  const dataShards = shards.filter(
    (s) => s.type === "delta" || s.type === "snapshot"
  );
  if (dataShards.length === 0) return null;
  return Math.max(...dataShards.map((s) => s.version));
}