encryptMessage function

Future<DidcommEncryptedMessage> encryptMessage({ required String connectionDid, required WalletStore wallet, required DidcommPlaintextMessage message, required String receiverDid, })

will encrypt the message using the resolved connectionDid (must be available in the wallet).

Implementation

Future<DidcommEncryptedMessage> encryptMessage(
    {required String connectionDid,
    required WalletStore wallet,
    required DidcommPlaintextMessage message,
    required String receiverDid}) async {
  // as per new change of the key type to ed25519
  // we will use getPrivateKeyForConnectionDidAsJwk to encrypt the message
  // var myPrivateKey =
  //    await wallet.getPrivateKeyForConnectionDidAsJwk(connectionDid);

  var myPrivateKey = await wallet.getKeyAgreementKeyForDidAsJwk(connectionDid);
  // @TODO what is that for? Replace me with some useful information
  var ddo = await resolveDidDocument(receiverDid);
  var keyIds = ddo.resolveKeyIds();
  var recipientDDO = keyIds.convertAllKeysToJwk();
  // var recipientDDO = (await resolveDidDocument(receiverDid))
  //     .resolveKeyIds()
  //     .convertAllKeysToJwk();

  var encrypted = DidcommEncryptedMessage.fromPlaintext(
      senderPrivateKeyJwk: myPrivateKey!,
      recipientPublicKeyJwk: [
        (recipientDDO.keyAgreement!.first as VerificationMethod).publicKeyJwk!
      ],
      plaintext: message);

  return encrypted;
}