feat: integrate enakgame and voucher

lib/domain/wallet/repositories/i_wallet_repository.dart

@@ -14,10 +14,6 @@ abstract class IWalletRepository {
 
   Future<Either<WalletFailure, WalletExpiring>> getExpiring();
 
-  Future<Either<WalletFailure, PaymentCode>> createPaymentCode({
-    required String pin,
-  });
-
   Future<Either<WalletFailure, ExchangePreview>> previewExchange({
     required int coins,
   });