getApkamPublicKey method

Future<String> getApkamPublicKey(String atSign, String enrollmentId)

Fetch the APKAM public signing key which enrollmentId of atSign has published in its per-enrollment namespace. See ApkamSigning.publicSigningKeyUri.

Implementation

Future<String> getApkamPublicKey(String atSign, String enrollmentId) async {
  atSign = atSign.toAtsign();
  requireApskEnrollmentId(enrollmentId);

  String? cached = lookupPubKey(atSign, enrollmentId);
  if (cached != null) return cached;

  var s = apskUri(atSign, enrollmentId);
  final AtValue av;
  try {
    av = await atClient.get(
      AtKey.fromString(s),
      getRequestOptions: GetRequestOptions()..useRemoteAtServer = true,
    );
  } on AtKeyNotFoundException {
    await _refuseIfWithdrawn(atSign, enrollmentId);
    rethrow;
  } on KeyNotFoundException {
    await _refuseIfWithdrawn(atSign, enrollmentId);
    rethrow;
  }
  if (av.value is! String) {
    throw IllegalStateException('Value of $s is not a String');
  }

  cachePubKey(atSign, enrollmentId, av.value);

  return av.value;
}