dubp.dart

import 'dart:async';
import 'dart:ffi';
import 'package:ffi/ffi.dart';
import 'package:isolate/ports.dart';
import "package:system_info/system_info.dart";

import 'ffi.dart' as native;

/// Language
enum Language {
  /// English
  english,

  /// French
  french,
}

/// New wallet
class NewWallet {
  /// DEWIF: Encrypted wallet
  String dewif;

  /// Secret code
  String pin;

  /// Public key
  String publicKey;

  NewWallet._(this.dewif, this.pin, this.publicKey);
}

/// Secret code type
enum SecretCodeType {
  /// Digits
  digits,

  /// Letters
  letters,
}

/// DUBP Rust utilities
///
/// All the functions of this package are static methods of this
/// class `DubpRust`.
class DubpRust {
  /// Must be called only once at the start of your application.
  static void setup() {
    native.store_dart_post_cobject(NativeApi.postCObject);
    print("DUBP_RS Setup Done");
  }

  /// Generate a random mnemonic
  static Future<String> genMnemonic({Language language = Language.english}) {
    final completer = Completer<String>();
    final sendPort =
        singleCompletePort<String, String>(completer, callback: _handleErr);
    native.gen_mnemonic(
      sendPort.nativePort,
      language.index,
    );
    return completer.future;
  }

  /// Change the secret code that encrypts the `dewif` keypair.
  static Future<NewWallet> changeDewifPin({
    String currency = "g1",
    String dewif,
    String oldPin,
    SecretCodeType secretCodeType = SecretCodeType.letters,
  }) async {