diff --git a/.gitignore b/.gitignore
index aab04fb..d0ecc48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@
 
 build/
 example/pubspec.lock
+coverage/lcov.info
diff --git a/lib/src/hyperpay.dart b/lib/src/hyperpay.dart
index a5965ed..4313828 100644
--- a/lib/src/hyperpay.dart
+++ b/lib/src/hyperpay.dart
@@ -173,6 +173,42 @@ class HyperpayPlugin {
     }
   }
 
+  /// Performs client side payment where payment configuration is
+  /// kept hidden on the server
+  ///
+  /// In contrast to [pay], [easyPay] assumes that the config is
+  /// on the server such that the mobile applications can request
+  /// a [checkoutId] from the server and then submits a custom
+  /// payment form to this funcion while taking into account
+  /// [brand] and [card] entered by user
+  ///
+  /// [easyPay] does not provide a feedback on the status of payment,
+  /// since all config is moved to the server; it is the server
+  /// that should provide a separate api for the mobile application
+  /// to request information about the status of a particular transaction.
+  ///
+  static Future<void> easyPay({
+    required String checkoutId,
+    required BrandType brand,
+    required CardInfo card,
+  }) async {
+    try {
+      await _channel.invokeMethod(
+        'start_payment_transaction',
+        {
+          'checkoutID': checkoutId,
+          'brand': brand.name.toUpperCase(),
+          'card': card.toMap(),
+        },
+      );
+      log('Transaction submitted, validate its status with the server',
+          name: "HyperpayPlugin/pay");
+    } catch (e) {
+      log('$e', name: "HyperpayPlugin/pay");
+      rethrow;
+    }
+  }
+
   /// Perform a transaction natively with Apple Pay.
   ///
   /// This method will throw a [NOT_SUPPORTED] error on any platform other than iOS.
diff --git a/pubspec.lock b/pubspec.lock
index 8181dc2..2566e35 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,6 +1,27 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "47.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.7.0"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.1"
   async:
     dependency: transitive
     description:
@@ -36,6 +57,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.16.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.1"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.2"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.2"
   fake_async:
     dependency: transitive
     description:
@@ -43,6 +85,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.1"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.4"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -53,6 +102,20 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
   http:
     dependency: "direct main"
     description:
@@ -60,6 +123,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.13.4"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.2.1"
   http_parser:
     dependency: transitive
     description:
@@ -67,6 +137,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.0.1"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.5"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   matcher:
     dependency: transitive
     description:
@@ -88,6 +179,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
+  mocktail:
+    dependency: "direct dev"
+    description:
+      name: mocktail
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.3.0"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
   path:
     dependency: transitive
     description:
@@ -95,11 +214,67 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.2"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.1"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.4.0"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.1"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.99"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.10.11"
   source_span:
     dependency: transitive
     description:
@@ -135,6 +310,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.1"
+  test:
+    dependency: transitive
+    description:
+      name: test
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.21.4"
   test_api:
     dependency: transitive
     description:
@@ -142,6 +324,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.4.12"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.16"
   typed_data:
     dependency: transitive
     description:
@@ -156,6 +345,41 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.2"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "9.4.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.0"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.1"
 sdks:
-  dart: ">=2.17.0 <3.0.0"
+  dart: ">=2.18.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index caa10ed..ba4f319 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -13,6 +13,7 @@ dependencies:
     sdk: flutter
 
 dev_dependencies:
+  mocktail: ^0.3.0
   flutter_test:
     sdk: flutter
 
diff --git a/test/hyperpay_test.dart b/test/hyperpay_test.dart
index 4705907..4d307dd 100644
--- a/test/hyperpay_test.dart
+++ b/test/hyperpay_test.dart
@@ -3,6 +3,10 @@ import 'dart:io';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:http/http.dart';
+import 'package:hyperpay/hyperpay.dart';
+import 'package:mocktail/mocktail.dart';
+
+class HyperPayPluginMock extends Mock implements HyperpayPlugin {}
 
 Client httpclinet = Client();
 void main() {
@@ -11,10 +15,21 @@ void main() {
 
   TestWidgetsFlutterBinding.ensureInitialized();
 
+  late HyperpayPlugin plugin;
+  late BrandType brand;
+  late CardInfo cardInfo;
   setUp(() {
     channel.setMockMethodCallHandler((MethodCall methodCall) async {
       return '42';
     });
+    plugin = HyperPayPluginMock();
+    brand = BrandType.visa;
+    cardInfo = CardInfo(
+        holder: 'Big Danny',
+        cardNumber: '4200000000000000',
+        cvv: '000',
+        expiryMonth: '12',
+        expiryYear: '55');
   });
 
   tearDown(() {
@@ -22,5 +37,23 @@ void main() {
   });
 
   test('Pay using checkout ID', () async {});
+  test('easyPay using checkout ID returns', () async {
+    when(
+      () => plugin.easyPay(
+          checkoutId: any(named: 'checkoutId'), brand: brand, card: cardInfo),
+    ).thenAnswer((_) => Future.value());
+
+    expectLater(plugin.easyPay(checkoutId: '42', brand: brand, card: cardInfo),
+        completes);
+  });
+  test('easyPay using checkout ID throws', () async {
+    when(
+      () => plugin.easyPay(
+          checkoutId: any(named: 'checkoutId'), brand: brand, card: cardInfo),
+    ).thenAnswer((_) => Future.error(Exception()));
+
+    expectLater(plugin.easyPay(checkoutId: '42', brand: brand, card: cardInfo),
+        throwsException);
+  });
   test('Get a specific payment status', () async {});
 }