createTxAndSignTx method
Implementation
Future<PROTO.Tx> createTxAndSignTx(Fee fee, List<dynamic> messages,
{String optionalNote = ""}) async {
var tx = await createTx(fee, optionalNote: optionalNote);
return (await key.signTx(tx.keys.first, tx.values.first, messages))
.toProtoWithType(messages);
}