async fn fetch_one(
client: &Client,
d: &PackDescriptor,
issuer_pubkey_hex: &str,
cache_dir: &Path,
) -> Result<RemotePack, FetchError>async fn fetch_one(
client: &Client,
d: &PackDescriptor,
issuer_pubkey_hex: &str,
cache_dir: &Path,
) -> Result<RemotePack, FetchError>