handle method

@override Future<IssueCredential?> handle(DidcommMessage message)

Actual handling method. variables can be expected to be non-null as configured

Implementation

@override
Future<IssueCredential?> handle(DidcommMessage message) async {
  // message as DidcommPlaintextMessage;

  var request = IssueCredential.fromJson(message.toJson());
  // var request = message as IssueCredential;
  Connection? myConnection;

  for (var entry in wallet!.getAllConnections().entries) {
    var did = entry.key;
    var connection = entry.value;
    if (request.to!.contains(did)) {
      myConnection = connection;
      break;
    }
  }

  if (myConnection == null) {
    throw DidcommServiceException(
        "This wallet is not owner of any "
        "of receivers of this credential (${request.to!.join(", ")}).",
        code: 34983459);
  }

  String oldCredentialDid = request.credentials!.first.id ??
      request.credentials!.first.credentialSubject['id'];
  Credential? oldCred = wallet!.getCredential(oldCredentialDid);

  if (oldCred == null) {
    throw DidcommServiceException(
        "This wallet doesn't contain a credential "
        "entry with did $oldCredentialDid. Please create one beforehand.",
        code: 9583904);
  }

  // Credential should be empty.
  if (oldCred.w3cCredential != '' && !force) {
    throw DidcommServiceException(
        "A credential is already stored. Use force "
        "to overwrite it.",
        code: 9583904);
  }

  // This searches each key type for a resolvable hdPath
  // @Todo the keytype should be determined by the credentials' key
  KeyType? successFullKeyType;
  for (var kt in KeyType.values) {
    try {
      await wallet!.storeCredential(
          request.credentials!.first.toString(), '', oldCred.hdPath,
          keyType: KeyType.secp256k1);
      successFullKeyType = kt;
      break;
    } catch (e) {
      // ignore, this is a one-off ()
    }
  }

  if (successFullKeyType == null) {
    throw DidcommServiceException(
        "Could not store credential. "
        " I cannot find a matching key type",
        code: 4827389234);
  }

  return null;
}