diff --git a/.github/workflows/playwright.yml b/.github/workflows/playwright.yml
index f046263..1a54546 100644
--- a/.github/workflows/playwright.yml
+++ b/.github/workflows/playwright.yml
@@ -1,7 +1,7 @@
 name: Playwright Tests
 on:
   push:
-    branches: [ '4.2' ]
+    branches: [ '4.4' ]
   pull_request:
     paths:
       - '**'
@@ -10,13 +10,15 @@ jobs:
   test:
     timeout-minutes: 60
     runs-on: ubuntu-latest
+    env:
+      TAG: ${{ matrix.tag }}
     strategy:
       fail-fast: false
       matrix:
-        operating-system: [ ubuntu-20.04 ]
+        tag: [ '8.2-apache-4.4', '8.3-apache-4.4', '8.4-apache-4.4', '8.5-apache-4.4' ]
         db: [ mysql, pgsql, sqlite3 ]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Setup environment
       if: matrix.db != 'sqlite3'
       env:
@@ -24,24 +26,22 @@ jobs:
       run: echo "COMPOSE_FILE=docker-compose.yml:docker-compose.${DB_TYPE}.yml:docker-compose.dev.yml" >> $GITHUB_ENV
     - name: Setup environment
       if: matrix.db == 'sqlite3'
-      env:
-        DB_TYPE: ${{ matrix.db }}
       run: echo "COMPOSE_FILE=docker-compose.yml:docker-compose.dev.yml" >> $GITHUB_ENV
     - name: Setup EC-CUBE
       run: docker compose up -d --wait
     - name: Install dependencies
-      run: npm ci
+      run: yarn install --frozen-lockfile
     - name: Install Playwright Browsers
-      run: npx playwright install
+      run: yarn playwright install
     - run: docker compose logs ec-cube
     - name: Run Playwright tests
       env:
         CI: 1
         FORCE_COLOR: 1
       run: yarn playwright test
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       if: always()
       with:
-        name: playwright-report
+        name: playwright-report-${{ matrix.tag }}-${{ matrix.db }}
         path: playwright-report/
         retention-days: 30
diff --git a/.gitignore b/.gitignore
index 597b993..438d3e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,11 @@
 composer.phar
 /vendor/
+.php-cs-fixer.cache
 
 # Commit your application's lock file https://getcomposer.org/doc/01-basic-usage.md#commit-your-composer-lock-file-to-version-control
 # You may choose to ignore a library lock file http://getcomposer.org/doc/02-libraries.md#lock-file
-# composer.lock
+# 本プラグインはライブラリ (type: eccube-plugin) のため composer.lock はコミットしない
+composer.lock
 node_modules/
 /test-results/
 /playwright-report/
@@ -11,3 +13,4 @@ node_modules/
 /test-results/
 /playwright-report/
 /playwright/.cache/
+package-lock.json
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..1083ee8
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,122 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## このリポジトリについて
+
+EC-CUBE 4 系の**決済プラグイン実装サンプル**。実際の決済代行会社向けプラグインを実装する開発者の参考実装として、3 種類の決済方式を 1 プラグインに収めている。
+
+- **リンク型クレジットカード決済** (`LinkCreditCard`) — 外部決済サーバの入力画面へリダイレクトする方式
+- **トークン型クレジットカード決済** (`CreditCard`) — トークンを受け取り自サイト内で完結する方式
+- **コンビニ決済** (`Convenience`) — 入金待ちステータスを持つ方式
+
+プラグインコードは `SamplePayment44`、Composer パッケージ名は `ec-cube/samplepayment44`。コード中の Twig 名前空間・クラス名前空間・トランス キーはすべて `SamplePayment44` 接頭辞を使う。
+
+### ブランチ運用
+
+ブランチ名が対応する EC-CUBE 本体バージョンを表す (`4.2`, `support-4.3`, `4.4` など)。`4.2` がデフォルトブランチ。本体 API の差異に応じて各バージョン用ブランチを保守している。各バージョンで動作する Docker イメージは `docker-compose.yml` の `image:` タグ (例 `ghcr.io/ec-cube/ec-cube-php:7.4-apache-4.2`) で固定されている。
+
+## 開発・テストコマンド
+
+このプラグイン単体では動作せず、**EC-CUBE 本体に組み込んだ状態**で開発・テストする。本体への組み込みと有効化は `docker-compose.dev.yml` の entrypoint が自動実行する (`eccube:composer:require` → `eccube:plugin:enable` → `dtb_payment_option` への INSERT)。
+
+```bash
+# 開発環境 (SQLite) の起動 — 本体取得・プラグイン有効化まで自動
+docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d --wait
+
+# MySQL / PostgreSQL で起動する場合は対応ファイルを重ねる
+docker compose -f docker-compose.yml -f docker-compose.mysql.yml -f docker-compose.dev.yml up -d --wait
+docker compose -f docker-compose.yml -f docker-compose.pgsql.yml -f docker-compose.dev.yml up -d --wait
+
+# 起動確認・ログ
+docker compose logs ec-cube
+```
+
+起動後のフロント URL は `https://localhost:4430` (自己署名証明書のため `ignoreHTTPSErrors`)、メールは MailCatcher (`http://localhost:1080`) で受信。
+
+### E2E テスト (Playwright)
+
+テストは `tests/*.test.ts` の Playwright E2E のみ (PHPUnit は無い)。`baseURL` は `https://localhost:4430`、対象は起動中の Docker 環境。
+
+```bash
+npm ci                              # 依存インストール
+npx playwright install              # ブラウザ取得
+yarn playwright test                # 全 E2E 実行
+yarn playwright test tests/guest_credit_token.test.ts   # 単一ファイル実行
+npx playwright test -g "テスト名"   # タイトル一致で単一テスト実行
+```
+
+テストファイルは決済方式ごと: `guest_credit_link` (リンク型) / `guest_credit_token` (トークン型) / `guest_convini` (コンビニ)。CI (`.github/workflows/playwright.yml`) は mysql / pgsql / sqlite3 のマトリクスで実行される。
+
+## 決済プラグインのアーキテクチャ
+
+### 決済処理ライフサイクル (最重要)
+
+各決済方式は `Eccube\Service\Payment\PaymentMethodInterface` を実装する `Service/Method/*.php` で、本体の購入フロー (`PurchaseFlow`) と連携して 3 段階で呼ばれる。**この 3 メソッドの責務分担が決済プラグイン実装の核心**:
+
+1. **`verify()`** — 注文確認画面遷移時。カードの有効性チェック等。`PaymentResult` を返す。トークン型はここでカード下 4 桁を取得・保持する。リンク型は実質何もしない。
+2. **`apply()`** — 注文確定時、決済実行**前**。受注ステータスを「決済処理中(PENDING)」、決済ステータスを「未決済(OUTSTANDING)」に変更し `purchaseFlow->prepare()` を呼ぶ。**リンク型はここで `PaymentDispatcher` に `RedirectResponse` を載せて返し、外部決済画面へ遷移させる**(`checkout()` は使わない)。
+3. **`checkout()`** — 注文確定時、決済実行。決済成功時は受注ステータスを NEW、決済ステータスを「仮売上(PROVISIONAL_SALES)」にして `purchaseFlow->commit()`、失敗時は `purchaseFlow->rollback()` してエラーを `PaymentResult` に詰める。
+
+成功/失敗は必ず `PaymentResult::setSuccess()` で表現し、`purchaseFlow` の `prepare`/`commit`/`rollback` と受注・決済ステータス更新を**対で**行うのが規約。各 Method は本体の `PurchaseFlow $shoppingPurchaseFlow` を DI で受け取る。
+
+### リンク型決済のリダイレクトフロー
+
+リンク型は `apply()` でのリダイレクト後、外部決済サーバとのやり取りを `Controller/PaymentController.php` (注文/戻る/完了通知) と `Controller/PaymentCompanyController.php` (決済会社画面の模擬) で処理する。本物の決済プラグインではここが Webhook / コールバック受信に相当する。
+
+### Entity 拡張 (trait + @EntityExtension)
+
+本体の既存 Entity にカラムを追加する際は `Entity/*Trait.php` に trait を定義し、クラス DocComment に `@EntityExtension("Eccube\Entity\Order")` を付与する。本サンプルでは:
+
+- `OrderTrait` — `Order` にトークン・カード下 4 桁・コンビニ種別・決済ステータスを追加 (`dtb_order.sample_payment_*` カラム)。下 4 桁のみ永続化せず確認画面表示用。
+- `CustomerTrait` — `Customer` にカード情報変更機能用のカラムを追加。
+
+プラグイン独自 Entity (`Config`, `PaymentStatus`, `CvsPaymentStatus`, `CvsType`) は通常の Doctrine Entity として `Entity/` に置き、対応する `Repository/` を持つ。
+
+### 画面への介入 (TemplateEvent)
+
+`SamplePaymentEvent.php` (`EventSubscriberInterface`) が `getSubscribedEvents()` でフックする Twig を宣言し、`TemplateEvent::addSnippet()` で `Resource/template/*.twig` を差し込む。本体テンプレートを直接編集せずに購入画面・確認画面・管理画面注文編集・マイページナビへ UI を追加する。`SamplePaymentNav.php` が管理画面メニュー、`SamplePaymentTwigBlock.php` がブロックを追加する。
+
+### PluginManager (インストール時処理)
+
+`PluginManager.php` の `enable()` が有効化時に実行される。決済方法 (`Payment` レコード) 3 種・初期設定・各種マスタ (PaymentStatus / CvsPaymentStatus / CvsType) ・マイページのカード情報変更ページ (`createPages()`) を登録する。決済方法と `Service/Method/*` クラスの紐付けもここで行う。
+
+### スロットリング設定
+
+`Resource/config/services.yaml` の `eccube.rate_limiter` でルート単位のレート制限を宣言できる (本サンプルではカード情報変更 `sample_payment_mypage_card_info` を ip/customer で 60 分 5 回に制限)。EC-CUBE 4.2+ のレートリミッタ機能を使う実装例。
+
+### 開発ツール設定ファイルは `Resource/` 配下に置く (rector.php / .php-cs-fixer.dist.php)
+
+`rector.php` や `.php-cs-fixer.dist.php` を**プラグインのルート直下に置いてはならない**。`Resource/rector.php` のように `Resource/` 配下に置く。
+
+**理由**: EC-CUBE 本体の `config/eccube/services.yaml` がプラグインを丸ごと PSR-4 サービス検出対象として読み込む:
+
+```yaml
+Plugin\:
+    resource: '../../../app/Plugin/*'
+    exclude: '../../../app/Plugin/*/{Entity,Resource,ServiceProvider,Tests,Codeception,DoctrineMigrations}'
+```
+
+`app/Plugin/SamplePayment44/` 直下のすべての `*.php` が「サービスクラス」として読み込まれるため、ルートに `rector.php` を置くと Symfony が `Plugin\SamplePayment44\rector` クラスを期待し、見つからず **EC-CUBE 全体が 500 エラー**になる (実際に遭遇したエラー):
+
+```
+Expected to find class "Plugin\SamplePayment44\rector" in file
+".../app/Plugin/SamplePayment44/rector.php" while importing services from
+resource "../../../app/Plugin/*", but it was not found!
+```
+
+上記 `exclude` に `Resource` が含まれるため、`Resource/` 配下に置けばサービス検出から外れ衝突しない。
+
+**本体では問題にならない理由**: 本体の autoconfigure 対象は `src/Eccube/*` で、プロジェクトルートはその外。ルート直下の `rector.php` / `.php-cs-fixer.dist.php` はグロブにかからないため本体では慣習どおりルートに置ける。プラグインは「ルートディレクトリ自体が PSR-4 ルートかつサービス検出対象」という点が決定的に異なる。
+
+**トレードオフ / 運用上の注意**:
+- 代償として `__DIR__` 基準のパスを `dirname(__DIR__)` に変更し、実行時に `--config=Resource/rector.php` を明示する必要がある。
+- 代替案 (ルートに置いて本体の `exclude` に追記) は本体改変が必要でプラグインの独立性を損なうため不可。プラグイン側の `services.yaml` では本体の `Plugin\:` 定義を上書きできない。
+- `.php-cs-fixer.dist.php` はドット始まりのため単体ではグロブに当たらない可能性もあるが (未検証)、`rector.php` と配置・運用を揃える一貫性のため同じ `Resource/` に置く。
+- **将来「本体に合わせてルートへ戻す」とリグレッションするため、この配置を変更しないこと。**
+
+## 規約メモ
+
+- 命名規約は本体の `eccube:plugin:generate` が生成する推奨ディレクトリ構成に合わせる (詳細は README.md および [issue #6](https://github.com/EC-CUBE/sample-payment-plugin/issues/6))。
+- 翻訳は `Resource/locale/messages.ja.yaml` / `validators.ja.yaml`。コードからは `trans('sample_payment.xxx')` で参照する。
+- 全 PHP ファイル冒頭に EC-CUBE 標準のライセンスヘッダを付与する。
diff --git a/Controller/Admin/ConfigController.php b/Controller/Admin/ConfigController.php
index 04d0402..9107576 100644
--- a/Controller/Admin/ConfigController.php
+++ b/Controller/Admin/ConfigController.php
@@ -11,36 +11,28 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Controller\Admin;
+namespace Plugin\SamplePayment44\Controller\Admin;
 
 use Eccube\Controller\AbstractController;
-use Plugin\SamplePayment42\Form\Type\Admin\ConfigType;
-use Plugin\SamplePayment42\Repository\ConfigRepository;
-use Symfony\Component\Routing\Annotation\Route;
-use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
+use Plugin\SamplePayment44\Form\Type\Admin\ConfigType;
+use Plugin\SamplePayment44\Repository\ConfigRepository;
+use Symfony\Bridge\Twig\Attribute\Template;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Attribute\Route;
 
 class ConfigController extends AbstractController
 {
-    /**
-     * @var ConfigRepository
-     */
-    protected $configRepository;
-
     /**
      * ConfigController constructor.
      *
      * @param ConfigRepository $configRepository
      */
-    public function __construct(ConfigRepository $configRepository)
+    public function __construct(protected ConfigRepository $configRepository)
     {
-        $this->configRepository = $configRepository;
     }
 
-    /**
-     * @Route("/%eccube_admin_route%/sample_payment/config", name="sample_payment_admin_config")
-     * @Template("@SamplePayment/admin/config.twig")
-     */
+    #[Route(path: '/%eccube_admin_route%/sample_payment/config', name: 'sample_payment_admin_config')]
+    #[Template(template: '@SamplePayment44/admin/config.twig')]
     public function index(Request $request)
     {
         $Config = $this->configRepository->get();
diff --git a/Controller/Admin/OrderController.php b/Controller/Admin/OrderController.php
index 43d7584..45e0463 100644
--- a/Controller/Admin/OrderController.php
+++ b/Controller/Admin/OrderController.php
@@ -11,22 +11,22 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Controller\Admin;
+namespace Plugin\SamplePayment44\Controller\Admin;
 
 use Eccube\Controller\AbstractController;
 use Eccube\Entity\Order;
-use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\Routing\Attribute\Route;
 
 class OrderController extends AbstractController
 {
     /**
      * 受注編集 > 決済のキャンセル処理
-     *
-     * @Route("/%eccube_admin_route%/sample_payment/order/cancel/{id}", requirements={"id" = "\d+"}, name="sample_payment_admin_order_cancel", methods={"POST"})
      */
-    public function cancel(Request $request, Order $Order)
+    #[Route(path: '/%eccube_admin_route%/sample_payment/order/cancel/{id}', requirements: ['id' => '\d+'], name: 'sample_payment_admin_order_cancel', methods: ['POST'])]
+    public function cancel(Request $request, Order $Order): JsonResponse
     {
         if ($request->isXmlHttpRequest() && $this->isTokenValid()) {
             // 通信処理
@@ -41,17 +41,38 @@ public function cancel(Request $request, Order $Order)
 
     /**
      * 受注編集 > 決済の金額変更
-     *
-     * @Route("/%eccube_admin_route%/sample_payment/order/change_price/{id}", requirements={"id" = "\d+"}, name="sample_payment_admin_order_change_price", methods={"POST"})
      */
-    public function changePrice(Request $request, Order $Order)
+    #[Route(path: '/%eccube_admin_route%/sample_payment/order/change_price/{id}', requirements: ['id' => '\d+'], name: 'sample_payment_admin_order_change_price', methods: ['POST'])]
+    public function changePrice(Request $request, Order $Order): JsonResponse
     {
         if ($request->isXmlHttpRequest() && $this->isTokenValid()) {
             // 通信処理
 
+            // 決済金額の計算は, 浮動小数点演算の丸め誤差を避けるため bcmath を使用する.
+            // EC-CUBE 本体も金額計算を bcmath で行っており, bcmath 拡張が無い環境では
+            // nanasess/bcmath-polyfill が関数を提供する (本体が依存に含むため別途要求は不要).
+            // 値は文字列で受け渡し, 第3引数 scale で小数桁を明示するのが本体の慣習.
+            // 以下はコンビニ決済手数料を例にした加減乗除 (bcadd/bcsub/bcmul/bcdiv) のサンプル.
+            $paymentTotal = $Order->getPaymentTotal(); // 本体の getPaymentTotal(): string
+
+            // 乗算・除算: 手数料 = 決済総額 × 手数料率(3.5%) ÷ 100 (小数以下切り捨て)
+            $feeRate = '3.5';
+            $fee = bcdiv(bcmul($paymentTotal, $feeRate, 4), '100', 0);
+
+            // 加算: 手数料を加えた金額
+            $totalWithFee = bcadd($paymentTotal, $fee, 0);
+
+            // 減算: キャンペーン割引(固定100円)を差し引いた最終請求額
+            $discount = '100';
+            $newPrice = bcsub($totalWithFee, $discount, 0);
+
+            // 実際のプラグインでは, ここで決済サーバへ変更後の金額を通知し,
+            // PurchaseFlow で受注金額を再計算・確定する.
+            // 本サンプルでは計算結果を返すのみで受注金額は変更しない.
+
             $this->addSuccess('sample_payment.admin.order.change_price.success', 'admin');
 
-            return $this->json([]);
+            return $this->json(['price' => $newPrice]);
         }
 
         throw new BadRequestHttpException();
diff --git a/Controller/Admin/PaymentStatusController.php b/Controller/Admin/PaymentStatusController.php
index efcb6c0..734621f 100644
--- a/Controller/Admin/PaymentStatusController.php
+++ b/Controller/Admin/PaymentStatusController.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Controller\Admin;
+namespace Plugin\SamplePayment44\Controller\Admin;
 
 use Eccube\Common\Constant;
 use Eccube\Controller\AbstractController;
@@ -20,36 +20,22 @@
 use Eccube\Repository\OrderRepository;
 use Eccube\Util\FormUtil;
 use Knp\Component\Pager\PaginatorInterface;
-use Plugin\SamplePayment42\Form\Type\Admin\SearchPaymentType;
-use Plugin\SamplePayment42\Repository\PaymentStatusRepository;
-use Symfony\Component\Routing\Annotation\Route;
-use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
+use Plugin\SamplePayment44\Form\Type\Admin\SearchPaymentType;
+use Plugin\SamplePayment44\Repository\PaymentStatusRepository;
+use Symfony\Bridge\Twig\Attribute\Template;
+use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Attribute\Route;
 
 /**
  * 決済状況管理
  */
 class PaymentStatusController extends AbstractController
 {
-    /**
-     * @var PaymentStatusRepository
-     */
-    protected $paymentStatusRepository;
-
-    /**
-     * @var PageMaxRepository
-     */
-    protected $pageMaxRepository;
-
-    /**
-     * @var OrderRepository
-     */
-    protected $orderRepository;
-
     /**
      * @var array
      */
-    protected $bulkActions = [
+    protected array $bulkActions = [
         ['id' => 1, 'name' => '一括売上'],
         ['id' => 2, 'name' => '一括取消'],
         ['id' => 3, 'name' => '一括再オーソリ'],
@@ -60,24 +46,17 @@ class PaymentStatusController extends AbstractController
      *
      * @param OrderStatusRepository $orderStatusRepository
      */
-    public function __construct(
-        PaymentStatusRepository $paymentStatusRepository,
-        PageMaxRepository $pageMaxRepository,
-        OrderRepository $orderRepository
-    ) {
-        $this->paymentStatusRepository = $paymentStatusRepository;
-        $this->pageMaxRepository = $pageMaxRepository;
-        $this->orderRepository = $orderRepository;
+    public function __construct(protected PaymentStatusRepository $paymentStatusRepository, protected PageMaxRepository $pageMaxRepository, protected OrderRepository $orderRepository, private readonly PaginatorInterface $paginator)
+    {
     }
 
     /**
      * 決済状況一覧画面
-     *
-     * @Route("/%eccube_admin_route%/sample_payment/payment_status", name="sample_payment_admin_payment_status")
-     * @Route("/%eccube_admin_route%/sample_payment/payment_status/{page_no}", requirements={"page_no" = "\d+"}, name="sample_payment_admin_payment_status_pageno")
-     * @Template("@SamplePayment/admin/payment_status.twig")
      */
-    public function index(Request $request, $page_no = null, PaginatorInterface $paginator)
+    #[Route(path: '/%eccube_admin_route%/sample_payment/payment_status', name: 'sample_payment_admin_payment_status')]
+    #[Route(path: '/%eccube_admin_route%/sample_payment/payment_status/{page_no}', requirements: ['page_no' => '\d+'], name: 'sample_payment_admin_payment_status_pageno')]
+    #[Template(template: '@SamplePayment44/admin/payment_status.twig')]
+    public function index(Request $request, $page_no = null): array
     {
         $searchForm = $this->createForm(SearchPaymentType::class);
 
@@ -157,7 +136,7 @@ public function index(Request $request, $page_no = null, PaginatorInterface $pag
         }
 
         $qb = $this->createQueryBuilder($searchData);
-        $pagination = $paginator->paginate(
+        $pagination = $this->paginator->paginate(
             $qb,
             $page_no,
             $page_count
@@ -176,10 +155,9 @@ public function index(Request $request, $page_no = null, PaginatorInterface $pag
 
     /**
      * 一括処理.
-     *
-     * @Route("/%eccube_admin_route%/sample_payment/payment_status/bulk_action/{id}", requirements={"id" = "\d+"}, name="sample_payment_admin_payment_status_bulk_action", methods={"POST"})
      */
-    public function bulkAction(Request $request, $id)
+    #[Route(path: '/%eccube_admin_route%/sample_payment/payment_status/bulk_action/{id}', requirements: ['id' => '\d+'], name: 'sample_payment_admin_payment_status_bulk_action', methods: ['POST'])]
+    public function bulk(Request $request, string $id): RedirectResponse
     {
         if (!isset($this->bulkActions[$id])) {
             throw new BadRequestHttpException();
@@ -198,12 +176,12 @@ public function bulkAction(Request $request, $id)
                     // 通信処理
                     // Order等の更新処理
                     break;
-                // 一括取消
+                    // 一括取消
                 case 2:
                     // 通信処理
                     // Order等の更新処理
                     break;
-                // 一括再オーソリ
+                    // 一括再オーソリ
                 case 3:
                     // 通信処理
                     // Order等の更新処理
diff --git a/Controller/MypageController.php b/Controller/MypageController.php
index d5305ce..57329a6 100644
--- a/Controller/MypageController.php
+++ b/Controller/MypageController.php
@@ -5,26 +5,24 @@
  *
  * Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved.
  *
- * http://www.ec-cube.co.jp/
+ * https://www.ec-cube.co.jp/
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Controller;
+namespace Plugin\SamplePayment44\Controller;
 
 use Eccube\Controller\AbstractController;
-use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
+use Symfony\Bridge\Twig\Attribute\Template;
 use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\Routing\Attribute\Route;
 
 class MypageController extends AbstractController
 {
-    /**
-     * @Route("/mypage/sample_payment_card_info", name="sample_payment_mypage_card_info", methods={"GET", "POST"})
-     * @Template("@SamplePayment42/card_info.twig")
-     */
+    #[Route(path: '/mypage/sample_payment_card_info', name: 'sample_payment_mypage_card_info', methods: ['GET', 'POST'])]
+    #[Template(template: '@SamplePayment44/card_info.twig')]
     public function index(Request $request)
     {
         $builder = $this->formFactory->createBuilder();
@@ -44,11 +42,9 @@ public function index(Request $request)
         ];
     }
 
-    /**
-     * @Route("/mypage/sample_payment_card_info_complete", name="sample_payment_mypage_card_info_complete", methods={"GET"})
-     * @Template("@SamplePayment42/card_info_complete.twig")
-     */
-    public function complete(Request $request)
+    #[Route(path: '/mypage/sample_payment_card_info_complete', name: 'sample_payment_mypage_card_info_complete', methods: ['GET'])]
+    #[Template(template: '@SamplePayment44/card_info_complete.twig')]
+    public function complete(): array
     {
         return [];
     }
diff --git a/Controller/PaymentCompanyController.php b/Controller/PaymentCompanyController.php
index 56e69e1..0ea8855 100755
--- a/Controller/PaymentCompanyController.php
+++ b/Controller/PaymentCompanyController.php
@@ -11,13 +11,13 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Controller;
+namespace Plugin\SamplePayment44\Controller;
 
 use Eccube\Controller\AbstractController;
-use Symfony\Component\Routing\Annotation\Route;
-use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
+use Symfony\Bridge\Twig\Attribute\Template;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Attribute\Route;
 
 /**
  * リンク式決済のカード番号入力画面.
@@ -26,10 +26,9 @@ class PaymentCompanyController extends AbstractController
 {
     /**
      * 決済サーバのカード入力画面.
-     *
-     * @Route("/payment_company")
-     * @Template("@SamplePayment42/dummy.twig")
      */
+    #[Route(path: '/payment_company')]
+    #[Template(template: '@SamplePayment44/dummy.twig')]
     public function index(Request $request)
     {
         $orderNo = $request->get('no');
diff --git a/Controller/PaymentController.php b/Controller/PaymentController.php
index 211868d..9f7c561 100755
--- a/Controller/PaymentController.php
+++ b/Controller/PaymentController.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Controller;
+namespace Plugin\SamplePayment44\Controller;
 
 use Eccube\Controller\AbstractController;
 use Eccube\Entity\Master\OrderStatus;
@@ -22,96 +22,44 @@
 use Eccube\Service\OrderStateMachine;
 use Eccube\Service\PurchaseFlow\PurchaseContext;
 use Eccube\Service\PurchaseFlow\PurchaseFlow;
-use Eccube\Service\ShoppingService;
-use Plugin\SamplePayment42\Entity\CvsPaymentStatus;
-use Plugin\SamplePayment42\Entity\PaymentStatus;
-use Plugin\SamplePayment42\Repository\CvsPaymentStatusRepository;
-use Plugin\SamplePayment42\Repository\PaymentStatusRepository;
-use Plugin\SamplePayment42\Service\Method\Convenience;
-use Symfony\Component\Routing\Annotation\Route;
+use Plugin\SamplePayment44\Entity\CvsPaymentStatus;
+use Plugin\SamplePayment44\Entity\PaymentStatus;
+use Plugin\SamplePayment44\Repository\CvsPaymentStatusRepository;
+use Plugin\SamplePayment44\Repository\PaymentStatusRepository;
+use Plugin\SamplePayment44\Service\Method\Convenience;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\Routing\Attribute\Route;
 
 /**
  * リンク式決済の注文/戻る/完了通知を処理する.
  */
 class PaymentController extends AbstractController
 {
-    /**
-     * @var OrderRepository
-     */
-    protected $orderRepository;
-
-    /**
-     * @var OrderStatusRepository
-     */
-    protected $orderStatusRepository;
-
-    /**
-     * @var PaymentStatusRepository
-     */
-    protected $paymentStatusRepository;
-
-    /**
-     * @var CvsPaymentStatusRepository
-     */
-    protected $cvsPaymentStatusRepository;
-
-    /**
-     * @var PurchaseFlow
-     */
-    protected $purchaseFlow;
-
-    /**
-     * @var CartService
-     */
-    protected $cartService;
-
-    /**
-     * @var OrderStateMachine
-     */
-    protected $orderStateMachine;
-
-
     /**
      * PaymentController constructor.
      *
      * @param OrderRepository $orderRepository
      * @param OrderStatusRepository $orderStatusRepository
      * @param PaymentStatusRepository $paymentStatusRepository
-     * @param CvsPaymentStatusRepository $CvsPaymentStatusRepository
      * @param PurchaseFlow $shoppingPurchaseFlow,
      * @param CartService $cartService
      * @param OrderStateMachine $orderStateMachine
+     * @param CvsPaymentStatusRepository $CvsPaymentStatusRepository
      */
-    public function __construct(
-        OrderRepository $orderRepository,
-        OrderStatusRepository $orderStatusRepository,
-        PaymentStatusRepository $paymentStatusRepository,
-        CvsPaymentStatusRepository $cvsPaymentStatusRepository,
-        PurchaseFlow $shoppingPurchaseFlow,
-        CartService $cartService,
-        OrderStateMachine $orderStateMachine
-    ) {
-        $this->orderRepository = $orderRepository;
-        $this->orderStatusRepository = $orderStatusRepository;
-        $this->paymentStatusRepository = $paymentStatusRepository;
-        $this->cvsPaymentStatusRepository = $cvsPaymentStatusRepository;
-        $this->purchaseFlow = $shoppingPurchaseFlow;
-        $this->cartService = $cartService;
-        $this->orderStateMachine = $orderStateMachine;
+    public function __construct(protected OrderRepository $orderRepository, protected OrderStatusRepository $orderStatusRepository, protected PaymentStatusRepository $paymentStatusRepository, protected CvsPaymentStatusRepository $cvsPaymentStatusRepository, protected PurchaseFlow $shoppingPurchaseFlow, protected CartService $cartService, protected OrderStateMachine $orderStateMachine)
+    {
     }
 
     /**
-     * @Route("/sample_payment_back", name="sample_payment_back")
-     *
      * @param Request $request
      *
      * @return RedirectResponse
      */
+    #[Route(path: '/sample_payment_back', name: 'sample_payment_back')]
     public function back(Request $request)
     {
         $orderNo = $request->get('no');
@@ -134,7 +82,7 @@ public function back(Request $request)
         $Order->setSamplePaymentPaymentStatus($PaymentStatus);
 
         // purchaseFlow::rollbackを呼び出し, 購入処理をロールバックする.
-        $this->purchaseFlow->rollback($Order, new PurchaseContext());
+        $this->shoppingPurchaseFlow->rollback($Order, new PurchaseContext());
 
         $this->entityManager->flush();
 
@@ -143,10 +91,9 @@ public function back(Request $request)
 
     /**
      * 完了画面へ遷移する.
-     *
-     * @Route("/sample_payment_complete", name="sample_payment_complete")
      */
-    public function complete(Request $request)
+    #[Route(path: '/sample_payment_complete', name: 'sample_payment_complete')]
+    public function complete(Request $request): RedirectResponse
     {
         $orderNo = $request->get('no');
         $Order = $this->getOrderByNo($orderNo);
@@ -172,10 +119,9 @@ public function complete(Request $request)
 
     /**
      * 結果通知URLを受け取る.
-     *
-     * @Route("/sample_payment_receive_complete", name="sample_payment_receive_complete")
      */
-    public function receiveComplete(Request $request)
+    #[Route(path: '/sample_payment_receive_complete', name: 'sample_payment_receive_complete')]
+    public function receiveComplete(Request $request): Response
     {
         // 決済会社から受注番号を受け取る
         $orderNo = $request->get('no');
@@ -197,7 +143,7 @@ public function receiveComplete(Request $request)
         $Order->appendCompleteMailMessage('');
 
         // purchaseFlow::commitを呼び出し, 購入処理を完了させる.
-        $this->purchaseFlow->commit($Order, new PurchaseContext());
+        $this->shoppingPurchaseFlow->commit($Order, new PurchaseContext());
 
         $this->entityManager->flush();
 
@@ -206,10 +152,9 @@ public function receiveComplete(Request $request)
 
     /**
      * 結果通知URLを受け取る(コンビニ決済).
-     *
-     * @Route("/sample_payment_receive_cvs_status", name="sample_payment_receive_cvs_status")
      */
-    public function receiveCvsStatus(Request $request)
+    #[Route(path: '/sample_payment_receive_cvs_status', name: 'sample_payment_receive_cvs_status')]
+    public function receiveCvsStatus(Request $request): Response
     {
         // 決済会社から受注番号を受け取る
         $orderNo = $request->get('no');
@@ -244,7 +189,7 @@ public function receiveCvsStatus(Request $request)
                 }
 
                 break;
-            // 期限切れ
+                // 期限切れ
             case CvsPaymentStatus::EXPIRED:
                 // 受注ステータスをキャンセルへ変更
                 $OrderStatus = $this->orderStatusRepository->find(OrderStatus::CANCEL);
@@ -259,7 +204,7 @@ public function receiveCvsStatus(Request $request)
                 }
 
                 break;
-            // 決済完了
+                // 決済完了
             case CvsPaymentStatus::COMPLETE:
             default:
                 // 受注ステータスを対応中へ変更
@@ -287,7 +232,7 @@ public function receiveCvsStatus(Request $request)
      *
      * @return Order
      */
-    private function getOrderByNo($orderNo)
+    private function getOrderByNo($orderNo): Order
     {
         /** @var OrderStatus $pendingOrderStatus */
         $pendingOrderStatus = $this->orderStatusRepository->find(OrderStatus::PENDING);
diff --git a/Entity/Config.php b/Entity/Config.php
index d67b088..7686f1b 100644
--- a/Entity/Config.php
+++ b/Entity/Config.php
@@ -11,52 +11,49 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Entity;
+namespace Plugin\SamplePayment44\Entity;
 
+use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
+use Plugin\SamplePayment44\Repository\ConfigRepository;
 
 /**
  * Config
- *
- * @ORM\Table(name="plg_sample_payment_config")
- * @ORM\Entity(repositoryClass="Plugin\SamplePayment42\Repository\ConfigRepository")
  */
+#[ORM\Table(name: 'plg_sample_payment_config')]
+#[ORM\Entity(repositoryClass: ConfigRepository::class)]
 class Config
 {
     /**
      * @var int
-     *
-     * @ORM\Column(name="id", type="integer", options={"unsigned":true})
-     * @ORM\Id
-     * @ORM\GeneratedValue(strategy="IDENTITY")
      */
-    private $id;
+    #[ORM\Column(name: 'id', type: Types::INTEGER, options: ['unsigned' => true])]
+    #[ORM\Id]
+    #[ORM\GeneratedValue(strategy: 'IDENTITY')]
+    private ?int $id = null;
 
     /**
      * @var string
-     *
-     * @ORM\Column(name="api_url", type="string", length=1024, nullable=true)
      */
-    private $api_url;
+    #[ORM\Column(name: 'api_url', type: Types::STRING, length: 1024, nullable: true)]
+    private ?string $api_url = null;
 
     /**
      * @var string
-     *
-     * @ORM\Column(name="api_id", type="string", length=255, nullable=true)
      */
-    private $api_id;
+    #[ORM\Column(name: 'api_id', type: Types::STRING, length: 255, nullable: true)]
+    private ?string $api_id = null;
 
     /**
      * @var string
-     *
-     * @ORM\Column(name="api_password", type="string", length=255, nullable=true)
      */
-    private $api_password;
+    #[ORM\Column(name: 'api_password', type: Types::STRING, length: 255, nullable: true)]
+    private ?string $api_password = null;
 
     /**
      * @return int
      */
-    public function getId()
+    public function getId(): int
     {
         return $this->id;
     }
@@ -64,7 +61,7 @@ public function getId()
     /**
      * @return string
      */
-    public function getApiUrl()
+    public function getApiUrl(): string
     {
         return $this->api_url;
     }
@@ -74,7 +71,7 @@ public function getApiUrl()
      *
      * @return $this;
      */
-    public function setApiUrl($api_url)
+    public function setApiUrl(string $api_url)
     {
         $this->api_url = $api_url;
 
@@ -84,7 +81,7 @@ public function setApiUrl($api_url)
     /**
      * @return string
      */
-    public function getApiId()
+    public function getApiId(): string
     {
         return $this->api_id;
     }
@@ -94,7 +91,7 @@ public function getApiId()
      *
      * @return $this;
      */
-    public function setApiId($api_id)
+    public function setApiId(string $api_id)
     {
         $this->api_id = $api_id;
 
@@ -104,7 +101,7 @@ public function setApiId($api_id)
     /**
      * @return string
      */
-    public function getApiPassword()
+    public function getApiPassword(): string
     {
         return $this->api_password;
     }
@@ -114,7 +111,7 @@ public function getApiPassword()
      *
      * @return $this
      */
-    public function setApiPassword($api_password)
+    public function setApiPassword(string $api_password)
     {
         $this->api_password = $api_password;
 
diff --git a/Entity/CustomerTrait.php b/Entity/CustomerTrait.php
index 73c42c7..6f60674 100644
--- a/Entity/CustomerTrait.php
+++ b/Entity/CustomerTrait.php
@@ -11,21 +11,21 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Entity;
+namespace Plugin\SamplePayment44\Entity;
 
+use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
-use Eccube\Annotation\EntityExtension;
+use Eccube\Attribute\EntityExtension;
+use Eccube\Entity\Customer;
 
-/**
- * @EntityExtension("Eccube\Entity\Customer")
- */
+#[EntityExtension(Customer::class)]
 trait CustomerTrait
 {
     /**
      * カードの記憶用カラム.
      *
      * @var string
-     * @ORM\Column(type="smallint", nullable=true)
      */
-    public $sample_payment_cards;
+    #[ORM\Column(type: Types::SMALLINT, nullable: true)]
+    public ?int $sample_payment_cards = null;
 }
diff --git a/Entity/CvsPaymentStatus.php b/Entity/CvsPaymentStatus.php
index 93c64ab..f41bbea 100644
--- a/Entity/CvsPaymentStatus.php
+++ b/Entity/CvsPaymentStatus.php
@@ -11,17 +11,17 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Entity;
+namespace Plugin\SamplePayment44\Entity;
 
 use Doctrine\ORM\Mapping as ORM;
 use Eccube\Entity\Master\AbstractMasterEntity;
+use Plugin\SamplePayment44\Repository\CvsPaymentStatusRepository;
 
 /**
  * CvsPaymentStatus
- *
- * @ORM\Table(name="plg_sample_payment_cvs_payment_status")
- * @ORM\Entity(repositoryClass="Plugin\SamplePayment42\Repository\CvsPaymentStatusRepository")
  */
+#[ORM\Table(name: 'plg_sample_payment_cvs_payment_status')]
+#[ORM\Entity(repositoryClass: CvsPaymentStatusRepository::class)]
 class CvsPaymentStatus extends AbstractMasterEntity
 {
     /**
@@ -31,21 +31,21 @@ class CvsPaymentStatus extends AbstractMasterEntity
     /**
      * 未決済
      */
-    const OUTSTANDING = 1;
+    public const OUTSTANDING = 1;
     /**
      * 要求成功
      */
-    const REQUEST = 2;
+    public const REQUEST = 2;
     /**
      * 決済完了
      */
-    const COMPLETE = 3;
+    public const COMPLETE = 3;
     /**
      * 決済失敗
      */
-    const FAILURE = 4;
+    public const FAILURE = 4;
     /**
      * 期限切れ
      */
-    const EXPIRED = 5;
+    public const EXPIRED = 5;
 }
diff --git a/Entity/CvsType.php b/Entity/CvsType.php
index b87399a..01b06f8 100644
--- a/Entity/CvsType.php
+++ b/Entity/CvsType.php
@@ -11,17 +11,17 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Entity;
+namespace Plugin\SamplePayment44\Entity;
 
 use Doctrine\ORM\Mapping as ORM;
 use Eccube\Entity\Master\AbstractMasterEntity;
+use Plugin\SamplePayment44\Repository\CvsTypeRepository;
 
 /**
  * コンビニ種別
- *
- * @ORM\Table(name="plg_sample_payment_cvs_type")
- * @ORM\Entity(repositoryClass="Plugin\SamplePayment42\Repository\CvsTypeRepository")
  */
+#[ORM\Table(name: 'plg_sample_payment_cvs_type')]
+#[ORM\Entity(repositoryClass: CvsTypeRepository::class)]
 class CvsType extends AbstractMasterEntity
 {
     /**
@@ -31,14 +31,14 @@ class CvsType extends AbstractMasterEntity
     /**
      * ローソン
      */
-    const LAWSON = '00001';
+    public const LAWSON = '00001';
     /**
      * ミニストップ
      */
-    const MINISTOP = '00005';
+    public const MINISTOP = '00005';
 
     /**
      * セブンイレブン
      */
-    const SEVENELEVEN = '00007';
+    public const SEVENELEVEN = '00007';
 }
diff --git a/Entity/OrderTrait.php b/Entity/OrderTrait.php
index 76ed4d0..31ebb5f 100644
--- a/Entity/OrderTrait.php
+++ b/Entity/OrderTrait.php
@@ -11,14 +11,14 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Entity;
+namespace Plugin\SamplePayment44\Entity;
 
+use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
-use Eccube\Annotation\EntityExtension;
+use Eccube\Attribute\EntityExtension;
+use Eccube\Entity\Order;
 
-/**
- * @EntityExtension("Eccube\Entity\Order")
- */
+#[EntityExtension(Order::class)]
 trait OrderTrait
 {
     /**
@@ -27,9 +27,9 @@ trait OrderTrait
      * dtb_order.sample_payment_token
      *
      * @var string
-     * @ORM\Column(type="string", nullable=true)
      */
-    private $sample_payment_token;
+    #[ORM\Column(type: Types::STRING, nullable: true)]
+    private ?string $sample_payment_token = null;
 
     /**
      * クレジットカード番号の末尾4桁.
@@ -37,7 +37,7 @@ trait OrderTrait
      *
      * @var string
      */
-    private $sample_payment_card_no_last4;
+    private string $sample_payment_card_no_last4;
 
     /**
      * コンビニ用種別を保持するカラム.
@@ -45,13 +45,10 @@ trait OrderTrait
      * dtb_order.sample_payment_cvs_type_id
      *
      * @var CvsType
-     * @ORM\ManyToOne(targetEntity="Plugin\SamplePayment42\Entity\CvsType")
-     * @ORM\JoinColumns({
-     *   @ORM\JoinColumn(name="sample_payment_cvs_type_id", referencedColumnName="id")
-     * })
      */
-    private $SamplePaymentCvsType;
-
+    #[ORM\JoinColumn(name: 'sample_payment_cvs_type_id', referencedColumnName: 'id')]
+    #[ORM\ManyToOne(targetEntity: CvsType::class)]
+    private ?CvsType $SamplePaymentCvsType = null;
 
     /**
      * 決済ステータスを保持するカラム.
@@ -59,12 +56,10 @@ trait OrderTrait
      * dtb_order.sample_payment_payment_status_id
      *
      * @var SamplePaymentPaymentStatus
-     * @ORM\ManyToOne(targetEntity="Plugin\SamplePayment42\Entity\PaymentStatus")
-     * @ORM\JoinColumns({
-     *   @ORM\JoinColumn(name="sample_payment_payment_status_id", referencedColumnName="id")
-     * })
      */
-    private $SamplePaymentPaymentStatus;
+    #[ORM\JoinColumn(name: 'sample_payment_payment_status_id', referencedColumnName: 'id')]
+    #[ORM\ManyToOne(targetEntity: PaymentStatus::class)]
+    private ?PaymentStatus $SamplePaymentPaymentStatus = null;
 
     /**
      * コンビニ用決済ステータスを保持するカラム.
@@ -72,17 +67,15 @@ trait OrderTrait
      * dtb_order.sample_payment_payment_status_id
      *
      * @var SamplePaymentCvsPaymentStatus
-     * @ORM\ManyToOne(targetEntity="Plugin\SamplePayment42\Entity\CvsPaymentStatus")
-     * @ORM\JoinColumns({
-     *   @ORM\JoinColumn(name="sample_payment_cvs_payment_status_id", referencedColumnName="id")
-     * })
      */
-    private $SamplePaymentCvsPaymentStatus;
+    #[ORM\JoinColumn(name: 'sample_payment_cvs_payment_status_id', referencedColumnName: 'id')]
+    #[ORM\ManyToOne(targetEntity: CvsPaymentStatus::class)]
+    private ?CvsPaymentStatus $SamplePaymentCvsPaymentStatus = null;
 
     /**
-     * @return string
+     * @return string|null
      */
-    public function getSamplePaymentToken()
+    public function getSamplePaymentToken(): ?string
     {
         return $this->sample_payment_token;
     }
@@ -92,7 +85,7 @@ public function getSamplePaymentToken()
      *
      * @return $this
      */
-    public function setSamplePaymentToken($sample_payment_token)
+    public function setSamplePaymentToken(string $sample_payment_token)
     {
         $this->sample_payment_token = $sample_payment_token;
 
@@ -100,25 +93,25 @@ public function setSamplePaymentToken($sample_payment_token)
     }
 
     /**
-     * @return string
+     * @return string|null
      */
-    public function getSamplePaymentCardNoLast4()
+    public function getSamplePaymentCardNoLast4(): ?string
     {
-        return $this->sample_payment_card_no_last4;
+        return $this->sample_payment_card_no_last4 ?? null;
     }
 
     /**
      * @param string $sample_payment_card_no_last4
      */
-    public function setSamplePaymentCardNoLast4($sample_payment_card_no_last4)
+    public function setSamplePaymentCardNoLast4(string $sample_payment_card_no_last4)
     {
         $this->sample_payment_card_no_last4 = $sample_payment_card_no_last4;
     }
 
     /**
-     * @return CvsType
+     * @return CvsType|null
      */
-    public function getSamplePaymentCvsType()
+    public function getSamplePaymentCvsType(): ?CvsType
     {
         return $this->SamplePaymentCvsType;
     }
@@ -132,33 +125,33 @@ public function setSamplePaymentCvsType(CvsType $SamplePaymentCvsType)
     }
 
     /**
-     * @return PaymentStatus
+     * @return PaymentStatus|null
      */
-    public function getSamplePaymentPaymentStatus()
+    public function getSamplePaymentPaymentStatus(): ?PaymentStatus
     {
         return $this->SamplePaymentPaymentStatus;
     }
 
     /**
-     * @param PaymentStatus $SamplePaymentPaymentStatus|null
+     * @param PaymentStatus|null $SamplePaymentPaymentStatus
      */
-    public function setSamplePaymentPaymentStatus(PaymentStatus $SamplePaymentPaymentStatus = null)
+    public function setSamplePaymentPaymentStatus(?PaymentStatus $SamplePaymentPaymentStatus = null)
     {
         $this->SamplePaymentPaymentStatus = $SamplePaymentPaymentStatus;
     }
 
     /**
-     * @return CvsPaymentStatus
+     * @return CvsPaymentStatus|null
      */
-    public function getSamplePaymentCvsPaymentStatus()
+    public function getSamplePaymentCvsPaymentStatus(): ?CvsPaymentStatus
     {
         return $this->SamplePaymentCvsPaymentStatus;
     }
 
     /**
-     * @param CvsPaymentStatus $SamplePaymentCvsPaymentStatus|null
+     * @param CvsPaymentStatus|null $SamplePaymentCvsPaymentStatus
      */
-    public function setSamplePaymentCvsPaymentStatus(CvsPaymentStatus $SamplePaymentCvsPaymentStatus = null)
+    public function setSamplePaymentCvsPaymentStatus(?CvsPaymentStatus $SamplePaymentCvsPaymentStatus = null)
     {
         $this->SamplePaymentCvsPaymentStatus = $SamplePaymentCvsPaymentStatus;
     }
diff --git a/Entity/PaymentStatus.php b/Entity/PaymentStatus.php
index 313cd04..75852b1 100644
--- a/Entity/PaymentStatus.php
+++ b/Entity/PaymentStatus.php
@@ -11,17 +11,17 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Entity;
+namespace Plugin\SamplePayment44\Entity;
 
 use Doctrine\ORM\Mapping as ORM;
 use Eccube\Entity\Master\AbstractMasterEntity;
+use Plugin\SamplePayment44\Repository\PaymentStatusRepository;
 
 /**
  * PaymentStatus
- *
- * @ORM\Table(name="plg_sample_payment_payment_status")
- * @ORM\Entity(repositoryClass="Plugin\SamplePayment42\Repository\PaymentStatusRepository")
  */
+#[ORM\Table(name: 'plg_sample_payment_payment_status')]
+#[ORM\Entity(repositoryClass: PaymentStatusRepository::class)]
 class PaymentStatus extends AbstractMasterEntity
 {
     /**
@@ -31,21 +31,21 @@ class PaymentStatus extends AbstractMasterEntity
     /**
      * 未決済
      */
-    const OUTSTANDING = 1;
+    public const OUTSTANDING = 1;
     /**
      * 有効性チェック済
      */
-    const ENABLED = 2;
+    public const ENABLED = 2;
     /**
      * 仮売上
      */
-    const PROVISIONAL_SALES = 3;
+    public const PROVISIONAL_SALES = 3;
     /**
      * 実売上
      */
-    const ACTUAL_SALES = 4;
+    public const ACTUAL_SALES = 4;
     /**
      * キャンセル
      */
-    const CANCEL = 5;
+    public const CANCEL = 5;
 }
diff --git a/Form/Extension/CreditCardExtention.php b/Form/Extension/CreditCardExtention.php
index 6bbf3de..91a4c28 100644
--- a/Form/Extension/CreditCardExtention.php
+++ b/Form/Extension/CreditCardExtention.php
@@ -11,12 +11,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Form\Extension;
+namespace Plugin\SamplePayment44\Form\Extension;
 
 use Eccube\Entity\Order;
 use Eccube\Form\Type\Shopping\OrderType;
 use Eccube\Repository\PaymentRepository;
-use Plugin\SamplePayment42\Service\Method\CreditCard;
 use Symfony\Component\Form\AbstractTypeExtension;
 use Symfony\Component\Form\Extension\Core\Type\HiddenType;
 use Symfony\Component\Form\FormBuilderInterface;
@@ -29,17 +28,11 @@
  */
 class CreditCardExtention extends AbstractTypeExtension
 {
-    /**
-     * @var PaymentRepository
-     */
-    protected $paymentRepository;
-
-    public function __construct(PaymentRepository $paymentRepository)
+    public function __construct(protected PaymentRepository $paymentRepository)
     {
-        $this->paymentRepository = $paymentRepository;
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         // ShoppingController::checkoutから呼ばれる場合は, フォーム項目の定義をスキップする.
         if ($options['skip_add_form']) {
diff --git a/Form/Extension/CvsExtension.php b/Form/Extension/CvsExtension.php
index 9d6f325..4865205 100644
--- a/Form/Extension/CvsExtension.php
+++ b/Form/Extension/CvsExtension.php
@@ -11,15 +11,15 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Form\Extension;
+namespace Plugin\SamplePayment44\Form\Extension;
 
 use Doctrine\ORM\EntityRepository;
 use Eccube\Entity\Order;
 use Eccube\Form\Type\Shopping\OrderType;
 use Eccube\Repository\PaymentRepository;
-use Plugin\SamplePayment42\Entity\CvsType;
-use Plugin\SamplePayment42\Repository\CvsTypeRepository;
-use Plugin\SamplePayment42\Service\Method\Convenience;
+use Plugin\SamplePayment44\Entity\CvsType;
+use Plugin\SamplePayment44\Repository\CvsTypeRepository;
+use Plugin\SamplePayment44\Service\Method\Convenience;
 use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 use Symfony\Component\Form\AbstractTypeExtension;
 use Symfony\Component\Form\FormBuilderInterface;
@@ -32,25 +32,11 @@
  */
 class CvsExtension extends AbstractTypeExtension
 {
-    /**
-     * @var PaymentRepository
-     */
-    protected $paymentRepository;
-
-    /**
-     * @var CvsTypeRepository
-     */
-    protected $cvsTypeRepository;
-
-    public function __construct(
-        CvsTypeRepository $cvsTypeRepository,
-        PaymentRepository $paymentRepository
-    ) {
-        $this->cvsTypeRepository = $cvsTypeRepository;
-        $this->paymentRepository = $paymentRepository;
+    public function __construct(protected CvsTypeRepository $cvsTypeRepository, protected PaymentRepository $paymentRepository)
+    {
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         // ShoppingController::checkoutから呼ばれる場合は, フォーム項目の定義をスキップする.
         if ($options['skip_add_form']) {
@@ -64,10 +50,8 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
             $form->add('SamplePaymentCvsType', EntityType::class, [
                 'class' => CvsType::class,
-                'query_builder' => function (EntityRepository $er) {
-                    return $er->createQueryBuilder('p')
-                        ->orderBy('p.id', 'ASC');
-                },
+                'query_builder' => fn (EntityRepository $er) => $er->createQueryBuilder('p')
+                    ->orderBy('p.id', 'ASC'),
                 'choice_label' => 'name',
                 'multiple' => false,
                 'expanded' => true,
diff --git a/Form/Type/Admin/ConfigType.php b/Form/Type/Admin/ConfigType.php
index 1d82bcd..81a54f4 100644
--- a/Form/Type/Admin/ConfigType.php
+++ b/Form/Type/Admin/ConfigType.php
@@ -11,9 +11,9 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Form\Type\Admin;
+namespace Plugin\SamplePayment44\Form\Type\Admin;
 
-use Plugin\SamplePayment42\Entity\Config;
+use Plugin\SamplePayment44\Entity\Config;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\Extension\Core\Type\UrlType;
@@ -23,7 +23,7 @@
 
 class ConfigType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('api_id', TextType::class, [
@@ -43,7 +43,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
             ]);
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'data_class' => Config::class,
diff --git a/Form/Type/Admin/SearchPaymentType.php b/Form/Type/Admin/SearchPaymentType.php
index 13b2da8..f4eeda9 100644
--- a/Form/Type/Admin/SearchPaymentType.php
+++ b/Form/Type/Admin/SearchPaymentType.php
@@ -11,19 +11,19 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Form\Type\Admin;
+namespace Plugin\SamplePayment44\Form\Type\Admin;
 
 use Doctrine\ORM\EntityRepository;
 use Eccube\Form\Type\Master\OrderStatusType;
 use Eccube\Form\Type\Master\PaymentType;
-use Plugin\SamplePayment42\Entity\PaymentStatus;
+use Plugin\SamplePayment44\Entity\PaymentStatus;
 use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\FormBuilderInterface;
 
 class SearchPaymentType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('Payments', PaymentType::class, [
@@ -36,10 +36,8 @@ public function buildForm(FormBuilderInterface $builder, array $options)
             ])
             ->add('PaymentStatuses', EntityType::class, [
                 'class' => PaymentStatus::class,
-                'query_builder' => function (EntityRepository $er) {
-                    return $er->createQueryBuilder('p')
-                        ->orderBy('p.id', 'ASC');
-                },
+                'query_builder' => fn (EntityRepository $er) => $er->createQueryBuilder('p')
+                    ->orderBy('p.id', 'ASC'),
                 'choice_label' => 'name',
                 'multiple' => true,
                 'expanded' => true,
diff --git a/PluginManager.php b/PluginManager.php
index 59d639e..e613d6f 100644
--- a/PluginManager.php
+++ b/PluginManager.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42;
+namespace Plugin\SamplePayment44;
 
 use Doctrine\ORM\EntityManagerInterface;
 use Eccube\Entity\Layout;
@@ -19,14 +19,13 @@
 use Eccube\Entity\PageLayout;
 use Eccube\Entity\Payment;
 use Eccube\Plugin\AbstractPluginManager;
-use Eccube\Repository\PaymentRepository;
-use Plugin\SamplePayment42\Entity\Config;
-use Plugin\SamplePayment42\Entity\CvsPaymentStatus;
-use Plugin\SamplePayment42\Entity\CvsType;
-use Plugin\SamplePayment42\Entity\PaymentStatus;
-use Plugin\SamplePayment42\Service\Method\Convenience;
-use Plugin\SamplePayment42\Service\Method\CreditCard;
-use Plugin\SamplePayment42\Service\Method\LinkCreditCard;
+use Plugin\SamplePayment44\Entity\Config;
+use Plugin\SamplePayment44\Entity\CvsPaymentStatus;
+use Plugin\SamplePayment44\Entity\CvsType;
+use Plugin\SamplePayment44\Entity\PaymentStatus;
+use Plugin\SamplePayment44\Service\Method\Convenience;
+use Plugin\SamplePayment44\Service\Method\CreditCard;
+use Plugin\SamplePayment44\Service\Method\LinkCreditCard;
 use Psr\Container\ContainerInterface;
 
 class PluginManager extends AbstractPluginManager
@@ -35,16 +34,16 @@ class PluginManager extends AbstractPluginManager
         [
             'name' => 'カード情報変更',
             'url' => 'sample_payment_mypage_card_info',
-            'filename' => 'SamplePayment42/Resource/template/card_info.twig',
+            'filename' => 'SamplePayment44/Resource/template/card_info.twig',
         ],
         [
             'name' => 'カード情報変更(完了)',
             'url' => 'sample_payment_mypage_card_info_complete',
-            'filename' => 'SamplePayment42/Resource/template/card_info_complete.twig',
+            'filename' => 'SamplePayment44/Resource/template/card_info_complete.twig',
         ],
     ];
 
-    public function enable(array $meta, ContainerInterface $container)
+    public function enable(array $meta, ContainerInterface $container): void
     {
         $this->createTokenPayment($container);
         $this->createLinkPayment($container);
@@ -152,7 +151,7 @@ private function createMasterData(ContainerInterface $container, array $statuses
         foreach ($statuses as $id => $name) {
             $PaymentStatus = $entityManager->find($class, $id);
             if (!$PaymentStatus) {
-                $PaymentStatus = new $class;
+                $PaymentStatus = new $class();
             }
             $PaymentStatus->setId($id);
             $PaymentStatus->setName($name);
diff --git a/README.md b/README.md
index 709646e..cb18b7b 100644
--- a/README.md
+++ b/README.md
@@ -32,19 +32,19 @@ http://doc4.ec-cube.net/quickstart_install
 
 本サンプルプラグインの場合は以下のようになります。
 
-`/app/Plugin/SamplePayment`
+`/app/Plugin/SamplePayment44`
 
 ## コマンドラインインタフェース
 
 ### 利用例
 - インストール
-`bin/console eccube:plugin:install --code=SamplePayment`
+`bin/console eccube:plugin:install --code=SamplePayment44`
 - 有効化
-`bin/console eccube:plugin:enable --code=SamplePayment`
+`bin/console eccube:plugin:enable --code=SamplePayment44`
 - 無効化
-`bin/console eccube:plugin:disable --code=SamplePayment`
+`bin/console eccube:plugin:disable --code=SamplePayment44`
 - 削除
-`bin/console eccube:plugin:uninstall --code=SamplePayment`
+`bin/console eccube:plugin:uninstall --code=SamplePayment44`
 
 ### プラグインジェネレータ
 
@@ -106,7 +106,7 @@ http://doc4.ec-cube.net/quickstart_install
 
 ### ルーティングの追加
 
-`@Route` アノテーションを付与したクラスファイルを `Controller` 以下に配置することで、サイトに新しいルーティングを追加することが可能です。
+`#[Route]` アトリビュートを付与したクラスファイルを `Controller` 以下に配置することで、サイトに新しいルーティングを追加することが可能です。（EC-CUBE 4.4 / Symfony 7 ではアノテーションは廃止され、PHP アトリビュートを使用します）
 
 Controllerファイルについては開発ドキュメント・マニュアルの[Controllerのカスタマイズ](http://doc4.ec-cube.net/customize_controller)ページをご確認ください。
 
@@ -114,9 +114,9 @@ Controllerファイルについては開発ドキュメント・マニュアル
 
 クラスファイルを `Entity` 以下に配置することで新しいEntityを追加可能です。
 
-traitと `@EntityExtension` アノテーションを使用して、既存Entityのフィールドを拡張可能です。
+traitと `#[EntityExtension]` アトリビュートを使用して、既存Entityのフィールドを拡張可能です。
 
-また、`@EntityExtension` アノテーションで拡張したフィールドに `@FormAppend` アノテーションを追加することで、フォームを自動生成できます。
+また、`#[EntityExtension]` アトリビュートで拡張したフィールドに `#[FormAppend]` アトリビュートを追加することで、フォームを自動生成できます。
 
 Entityファイルについては開発ドキュメント・マニュアルの[Entityのカスタマイズ](http://doc4.ec-cube.net/customize_entity)ページをご確認ください。
 
@@ -137,7 +137,7 @@ FormExtensionについては開発ドキュメント・マニュアルの[FormTy
 ```php
 class Event implements EventSubscriberInterface
 {
-    public static function getSubscribedEvents()
+    public static function getSubscribedEvents(): array
     {
         return ['eventName' => 'methodName'];
     }
@@ -159,7 +159,7 @@ class Event implements EventSubscriberInterface
 ```php
 class Nav implements EccubeNav
 {
-    public static function getNav()
+    public static function getNav(): array
     {
         return [
             'product' => [
@@ -221,7 +221,7 @@ twig内で変数を使用する場合は、TemplateEventで渡します。
 ```php
 class Event implements EventSubscriberInterface
 {
-    public static function getSubscribedEvents()
+    public static function getSubscribedEvents(): array
     {
         return [
             'xxx.twig' => 'onXxxTwig',
@@ -241,13 +241,13 @@ class Event implements EventSubscriberInterface
 
 - 商品購入ページ
 ```twig
-{{ include('@SamplePayment/credit.twig', ignore_missing=true) }}
-{{ include('@SamplePayment/cvs.twig', ignore_missing=true) }}
+{{ include('@SamplePayment44/credit.twig', ignore_missing=true) }}
+{{ include('@SamplePayment44/cvs.twig', ignore_missing=true) }}
 ```
 - 商品購入/ご注文確認ページ
 ```twig
-{{ include('@SamplePayment/credit_confirm.twig', ignore_missing=true) }}
-{{ include('@SamplePayment/cvs_confirm.twig', ignore_missing=true) }}
+{{ include('@SamplePayment44/credit_confirm.twig', ignore_missing=true) }}
+{{ include('@SamplePayment44/cvs_confirm.twig', ignore_missing=true) }}
 ```
 
 ### 画面への介入について
@@ -264,12 +264,10 @@ EC-CUBE4からはTemplateEventに新たな関数を用意し、それを利用
  * ここで追加したコードは, <head></head>内に出力される
  * javascriptの読み込みやcssの読み込みに利用する.
  *
- * @param $asset
+ * @param string $asset
  * @param bool $include twigファイルとしてincludeするかどうか
- *
- * @return $this
  */
-public function addAsset($asset, $include = true)
+public function addAsset(string $asset, bool $include = true): static
 {
     $this->assets[$asset] = $include;
 
@@ -283,12 +281,10 @@ public function addAsset($asset, $include = true)
  *
  * ここで追加したコードは, </body>タグ直前に出力される
  *
- * @param $snippet
+ * @param string $snippet
  * @param bool $include twigファイルとしてincludeするかどうか
- *
- * @return $this
  */
-public function addSnippet($snippet, $include = true)
+public function addSnippet(string $snippet, bool $include = true): static
 {
     $this->snippets[$snippet] = $include;
 
@@ -310,10 +306,7 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 class AdminSampleEvent implements EventSubscriberInterface
 {
-    /**
-     * @return array
-     */
-    public static function getSubscribedEvents()
+    public static function getSubscribedEvents(): array
     {
         return [
             '@admin/Product/index.twig' => 'productList',
@@ -371,16 +364,17 @@ class AdminSampleEvent implements EventSubscriberInterface
 
 注文手続き画面でsubmitされた時に実行する処理を実装します。
 主に、クレジットカード決済の有効性チェックをするために使用します。
-このメソッドは、 `PaymentResult` を返します。
-`PaymentResult` には、実行結果、エラーメッセージなどを設定します。
-`Response` を設定して、他の画面にリダイレクトしたり、独自の出力を実装することも可能です。
+このメソッドの戻り型は EC-CUBE 4.4 / Symfony 7 で `PaymentResult|bool` に変更されました。
+**確認画面へ進めたい（成功）場合は `false` を返します。** 失敗時のみ `PaymentResult` を返し、実行結果・エラーメッセージなどを設定します。
+（成功時に `PaymentResult` を返すと本体 `ShoppingController` が `getResponse()->isRedirection()` を null に対して呼び出し 500 エラーになります）
+リダイレクトや独自の出力が必要な場合は、`PaymentResult` に `Response` を設定します。
 
 #### `apply()`
 
 注文確認画面でsubmitされた時に、他の Controller へ処理を移譲する実装をします。
 主にリンク型決済や、キャリア決済など、決済会社の画面へ遷移する必要がある場合に使用します。
 また、独自に作成した Controller に遷移する場合にも使用できます。
-このメソッドは `PaymentDispatcher` を返します。
+このメソッドの戻り型は EC-CUBE 4.4 / Symfony 7 で `PaymentDispatcher|bool` に変更されました。リダイレクトが不要な場合は `false` を返します。
 `PaymentDispatcher` は、他の Controller へ `Redirect` もしくは `Forward` させるための情報を設定します。
 決済会社の画面など、サイト外へ遷移させる場合は、 `Response` を設定します。
 
@@ -432,7 +426,7 @@ twigのソースコード内でメッセージを使用する場合には `trans
 
 ### DBの更新方法
 
-1. Entity拡張のORMアノテーションでDBの設定を更新
+1. Entity拡張のORMアトリビュート（`#[ORM\Column]` 等）でDBの設定を更新
 1. コマンドラインからプロキシファイルを作成 `bin/console eccube:generate:proxies`
 1. DBの更新内容の確認 `bin/console doctrine:schema:update --dump-sql`
 1. DBの更新を実行 `bin/console doctrine:schema:update --dump-sql --force`
@@ -441,36 +435,36 @@ twigのソースコード内でメッセージを使用する場合には `trans
 
 ## ファイルごとの概要
 
-### [Plugin\SamplePayment42\Service\Method\CreditCard](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Service/Method/CreditCard.php)
+### [Plugin\SamplePayment44\Service\Method\CreditCard](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Service/Method/CreditCard.php)
 
 トークン型クレジットカード払い用のビジネスロジッククラス
 
-### [Plugin\SamplePayment42\Service\Method\LinkCreditCard](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Service/Method/LinkCreditCard.php)
+### [Plugin\SamplePayment44\Service\Method\LinkCreditCard](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Service/Method/LinkCreditCard.php)
 
 リンク型クレジットカード払い用のビジネスロジッククラス
 
-### [Plugin\SamplePayment42\Service\Method\Convenience](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Service/Method/Convenience.php)
+### [Plugin\SamplePayment44\Service\Method\Convenience](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Service/Method/Convenience.php)
 
 コンビニ決済用のビジネスロジッククラス
 
-### [Plugin\SamplePayment42\Controller\Admin\ConfigController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Controller/Admin/ConfigController.php)
+### [Plugin\SamplePayment44\Controller\Admin\ConfigController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Controller/Admin/ConfigController.php)
 
 プラグイン設定画面のコントローラクラス。
 
-### [Plugin\SamplePayment42\Controller\Admin\OrderController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Controller/Admin/OrderController.php)
+### [Plugin\SamplePayment44\Controller\Admin\OrderController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Controller/Admin/OrderController.php)
 
 受注編集画面から Ajax で通信するコントローラクラス。
 主に管理画面の操作と連動して、決済サーバーとの通信を実装する
 
-### [Plugin\SamplePayment42\Controller\Admin\PaymentStatusController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Controller/Admin/PaymentStatusController.php)
+### [Plugin\SamplePayment44\Controller\Admin\PaymentStatusController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Controller/Admin/PaymentStatusController.php)
 
 決済ステータス一括変更画面のコントローラクラス
 
-### [Plugin\SamplePayment42\Controller\PaymentCompanyController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Controller/PaymentCompanyController.php)
+### [Plugin\SamplePayment44\Controller\PaymentCompanyController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Controller/PaymentCompanyController.php)
 
 リンク型決済のダミー画面。決済会社のカード入力フォームに相当する。
 
-### [Plugin\SamplePayment42\Controller\PaymentController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Controller/PaymentController.php)
+### [Plugin\SamplePayment44\Controller\PaymentController](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Controller/PaymentController.php)
 
 リンク型決済およびコンビニ決済と連携するためのコントローラクラス。
 
@@ -480,99 +474,99 @@ twigのソースコード内でメッセージを使用する場合には `trans
 
 などを実装する。
 
-### [Plugin\SamplePayment42\Entity\Config](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Entity/Config.php)
+### [Plugin\SamplePayment44\Entity\Config](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Entity/Config.php)
 
 プラグイン設定画面のエンティティクラス。
 
-### [Plugin\SamplePayment42\Entity\CustomerTrait](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Entity/CustomerTrait.php)
+### [Plugin\SamplePayment44\Entity\CustomerTrait](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Entity/CustomerTrait.php)
 
 Customer 拡張用のトレイト。決済会社から取得した、クレジットカード等の JSON データを格納する。
 
-### [Plugin\SamplePayment42\Entity\OrderTrait](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Entity/OrderTrait.php)
+### [Plugin\SamplePayment44\Entity\OrderTrait](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Entity/OrderTrait.php)
 
 Order 拡張用のトレイト。クレジットカードのトークンや、決済ステータス、コンビニ種別などを格納する。
 
-### [Plugin\SamplePayment42\Entity\PaymentStatus](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Entity/PaymentStatus.php)
+### [Plugin\SamplePayment44\Entity\PaymentStatus](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Entity/PaymentStatus.php)
 
 決済ステータスのエンティティクラス。
 
-### [Plugin\SamplePayment42\Entity\CvsPaymentStatus](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Entity/CvsPaymentStatus.php)
+### [Plugin\SamplePayment44\Entity\CvsPaymentStatus](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Entity/CvsPaymentStatus.php)
 
 コンビニ決済の決済ステータスのエンティティクラス。
 
-### [Plugin\SamplePayment42\Entity\CvsType](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Entity/CvsType.php)
+### [Plugin\SamplePayment44\Entity\CvsType](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Entity/CvsType.php)
 
 コンビニの種別のエンティティクラス。
 
-### [Plugin\SamplePayment42\Event](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Event.php)
+### [Plugin\SamplePayment44\SamplePaymentEvent](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/SamplePaymentEvent.php)
 
 プラグインで使用する `EventSubscriber`
 管理画面のテンプレートを拡張するために使用している。
 
-### [Plugin\SamplePayment42\Form\Extension\CreditCardExtention](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Form/Extension/CreditCardExtention.php)
+### [Plugin\SamplePayment44\Form\Extension\CreditCardExtention](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Form/Extension/CreditCardExtention.php)
 
 クレジットカード払い用のフォームエクステンション。
 ご注文情報入力画面に、クレジットカード入力フォームを実装するために使用する。
 
-### [Plugin\SamplePayment42\Form\Extension\CvsExtension](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Form/Extension/CvsExtension.php)
+### [Plugin\SamplePayment44\Form\Extension\CvsExtension](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Form/Extension/CvsExtension.php)
 
 コンビニ決済用のフォームエクステンション。
 ご注文情報入力画面に、コンビニ選択フォームを実装するために使用する。
 
-### [Plugin\SamplePayment42\Form\Type\Admin\ConfigType](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Form/Type/Admin/ConfigType.php)
+### [Plugin\SamplePayment44\Form\Type\Admin\ConfigType](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Form/Type/Admin/ConfigType.php)
 
 プラグイン設定画面用のフォームタイプ
 
-### [Plugin\SamplePayment42\Form\Type\Admin\SearchPaymentType](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Form/Type/Admin/SearchPaymentType.php)
+### [Plugin\SamplePayment44\Form\Type\Admin\SearchPaymentType](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Form/Type/Admin/SearchPaymentType.php)
 
 決済ステータス一括変更画面用のフォームタイプ
 
-### [Plugin\SamplePayment42\Nav](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Nav.php)
+### [Plugin\SamplePayment44\SamplePaymentNav](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/SamplePaymentNav.php)
 
 管理画面ナビ拡張用クラス
 
-### [Plugin\SamplePayment42\PluginManager](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/PluginManager.php)
+### [Plugin\SamplePayment44\PluginManager](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/PluginManager.php)
 
 PluginManager クラス。 install/uninstall/enable/disable の処理を実装する。
 
-### [Plugin\SamplePayment42\PluginManager\Repository\ConfigRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Repository/ConfigRepository.php)
+### [Plugin\SamplePayment44\Repository\ConfigRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Repository/ConfigRepository.php)
 
 プラグイン設定画面用のリポジトリクラス
 
-### [Plugin\SamplePayment42\PluginManager\Repository\PaymentStatusRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Repository/PaymentStatusRepository.php)
+### [Plugin\SamplePayment44\Repository\PaymentStatusRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Repository/PaymentStatusRepository.php)
 
 決済ステータス用のリポジトリクラス
 
-### [Plugin\SamplePayment42\PluginManager\Repository\CvsPaymentStatusRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Repository/CvsPaymentStatusRepository.php)
+### [Plugin\SamplePayment44\Repository\CvsPaymentStatusRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Repository/CvsPaymentStatusRepository.php)
 
 コンビニ決済ステータス用のリポジトリクラス
 
-### [Plugin\SamplePayment42\PluginManager\Repository\CvsTypeRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Repository/CvsTypeRepository.php)
+### [Plugin\SamplePayment44\Repository\CvsTypeRepository](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Repository/CvsTypeRepository.php)
 
 コンビニ種別用のリポジトリクラス
 
-### [Plugin\SamplePayment42\TwigBlock](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/TwigBlock.php)
+### [Plugin\SamplePayment44\SamplePaymentTwigBlock](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/SamplePaymentTwigBlock.php)
 
 TwigBlock定義用クラス
 
-### [composer.json](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/composer.json)
+### [composer.json](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/composer.json)
 
 プラグイン定義ファイル
 
-### [Resource/config/services.yaml](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Resource/config/services.yaml)
+### [Resource/config/services.yaml](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Resource/config/services.yaml)
 
 パラメータ定義用設定ファイル
 
-### [Resource/locale/messages.ja.yaml](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Resource/locale/messages.ja.yaml)
+### [Resource/locale/messages.ja.yaml](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Resource/locale/messages.ja.yaml)
 
 メッセージ翻訳ファイル
 
-### [Resource/locale/validators.ja.yaml](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Resource/locale/validators.ja.yaml)
+### [Resource/locale/validators.ja.yaml](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Resource/locale/validators.ja.yaml)
 
 エラーメッセージ翻訳ファイル
 
 
-### [Resource/template/*.twig](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.0/Resource/template)
+### [Resource/template/*.twig](https://github.com/EC-CUBE/sample-payment-plugin/blob/4.4/Resource/template)
 
 各種テンプレートファイル
 
diff --git a/Repository/ConfigRepository.php b/Repository/ConfigRepository.php
index 39f7f19..60f00af 100644
--- a/Repository/ConfigRepository.php
+++ b/Repository/ConfigRepository.php
@@ -11,11 +11,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Repository;
+namespace Plugin\SamplePayment44\Repository;
 
 use Doctrine\Persistence\ManagerRegistry as RegistryInterface;
 use Eccube\Repository\AbstractRepository;
-use Plugin\SamplePayment42\Entity\Config;
+use Plugin\SamplePayment44\Entity\Config;
 
 class ConfigRepository extends AbstractRepository
 {
diff --git a/Repository/CvsPaymentStatusRepository.php b/Repository/CvsPaymentStatusRepository.php
index ad35c04..53d16b6 100644
--- a/Repository/CvsPaymentStatusRepository.php
+++ b/Repository/CvsPaymentStatusRepository.php
@@ -11,11 +11,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Repository;
+namespace Plugin\SamplePayment44\Repository;
 
 use Doctrine\Persistence\ManagerRegistry as RegistryInterface;
 use Eccube\Repository\AbstractRepository;
-use Plugin\SamplePayment42\Entity\CvsPaymentStatus;
+use Plugin\SamplePayment44\Entity\CvsPaymentStatus;
 
 class CvsPaymentStatusRepository extends AbstractRepository
 {
diff --git a/Repository/CvsTypeRepository.php b/Repository/CvsTypeRepository.php
index 7f0e33b..cb8898c 100644
--- a/Repository/CvsTypeRepository.php
+++ b/Repository/CvsTypeRepository.php
@@ -11,11 +11,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Repository;
+namespace Plugin\SamplePayment44\Repository;
 
 use Doctrine\Persistence\ManagerRegistry as RegistryInterface;
 use Eccube\Repository\AbstractRepository;
-use Plugin\SamplePayment42\Entity\CvsType;
+use Plugin\SamplePayment44\Entity\CvsType;
 
 class CvsTypeRepository extends AbstractRepository
 {
diff --git a/Repository/PaymentStatusRepository.php b/Repository/PaymentStatusRepository.php
index 1a57a4f..bd89c2d 100644
--- a/Repository/PaymentStatusRepository.php
+++ b/Repository/PaymentStatusRepository.php
@@ -11,11 +11,11 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Repository;
+namespace Plugin\SamplePayment44\Repository;
 
 use Doctrine\Persistence\ManagerRegistry as RegistryInterface;
 use Eccube\Repository\AbstractRepository;
-use Plugin\SamplePayment42\Entity\PaymentStatus;
+use Plugin\SamplePayment44\Entity\PaymentStatus;
 
 class PaymentStatusRepository extends AbstractRepository
 {
diff --git a/Resource/.php-cs-fixer.dist.php b/Resource/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..7d42e99
--- /dev/null
+++ b/Resource/.php-cs-fixer.dist.php
@@ -0,0 +1,55 @@
+<?php
+
+if (php_sapi_name() !== 'cli') {
+    throw new \LogicException();
+}
+
+$header = <<<EOL
+This file is part of EC-CUBE
+
+Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved.
+
+https://www.ec-cube.co.jp/
+
+For the full copyright and license information, please view the LICENSE
+file that was distributed with this source code.
+EOL;
+
+$rules = [
+    '@Symfony' => true,
+    'array_syntax' => ['syntax' => 'short'],
+    'phpdoc_align' => false,
+    'phpdoc_summary' => false,
+    'phpdoc_annotation_without_dot' => false,
+    'no_superfluous_phpdoc_tags' => false,
+    'increment_style' => false,
+    'yoda_style' => false,
+    'header_comment' => ['header' => $header],
+    'phpdoc_add_missing_param_annotation' => true,
+    'phpdoc_param_order' => true,
+    'phpdoc_to_comment' => false, // /** @var */ を変換してしまうため
+    'phpdoc_trim' => true,
+    'global_namespace_import' => [
+        'import_classes' => false,
+        'import_constants' => false,
+        'import_functions' => false,
+    ],
+    // PHPDocの型をネイティブ型へ
+    'phpdoc_to_param_type' => true,
+    'phpdoc_to_return_type' => true,
+    'phpdoc_to_property_type' => true,
+];
+
+$finder = \PhpCsFixer\Finder::create()
+    ->in(dirname(__DIR__))
+    ->exclude(['vendor', 'node_modules', 'Resource'])
+    ->name('*.php')
+;
+$config = new \PhpCsFixer\Config();
+
+return $config
+    ->setRules($rules)
+    ->setFinder($finder)
+    ->setRiskyAllowed(true)
+    ->setUnsupportedPhpVersionAllowed(true)
+;
diff --git a/Resource/rector.php b/Resource/rector.php
new file mode 100644
index 0000000..bf1aa0e
--- /dev/null
+++ b/Resource/rector.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of EC-CUBE
+ *
+ * Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved.
+ *
+ * http://www.ec-cube.co.jp/
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Rector\Config\RectorConfig;
+use Rector\Doctrine\Set\DoctrineSetList;
+use Rector\Renaming\Rector\Name\RenameClassRector;
+use Rector\Set\ValueObject\LevelSetList;
+use Rector\Symfony\Set\SymfonySetList;
+use Rector\ValueObject\PhpVersion;
+
+return RectorConfig::configure()
+    // EC-CUBE 4.4 の最小サポートバージョンに合わせる
+    ->withPhpVersion(PhpVersion::PHP_82)
+    // プラグインのソースディレクトリ
+    ->withPaths([
+        dirname(__DIR__).'/Controller',
+        dirname(__DIR__).'/Entity',
+        dirname(__DIR__).'/Form',
+        dirname(__DIR__).'/Repository',
+        dirname(__DIR__).'/Service',
+        dirname(__DIR__).'/Util',
+        dirname(__DIR__).'/PluginManager.php',
+        dirname(__DIR__).'/SamplePaymentEvent.php',
+        dirname(__DIR__).'/SamplePaymentNav.php',
+        dirname(__DIR__).'/SamplePaymentTwigBlock.php',
+    ])
+    ->withSkip([
+        dirname(__DIR__).'/vendor',
+        dirname(__DIR__).'/node_modules',
+    ])
+    ->withSets([
+        LevelSetList::UP_TO_PHP_82,
+        // Symfony 7.4 対応 (@Route → #[Route], @Template, buildForm(): void 等)
+        SymfonySetList::SYMFONY_74,
+        SymfonySetList::SYMFONY_CODE_QUALITY,
+        // Doctrine ORM 3.0 / DBAL 3.0 対応 (@ORM → #[ORM], 型付きプロパティ)
+        DoctrineSetList::DOCTRINE_CODE_QUALITY,
+        DoctrineSetList::DOCTRINE_DBAL_30,
+        DoctrineSetList::ANNOTATIONS_TO_ATTRIBUTES,
+    ])
+    // Symfony/Doctrine 等のアノテーション → アトリビュート変換を有効化
+    ->withAttributesSets()
+    // #[Route] は付与されるが use 文が旧 Annotation のまま残るため Attribute へ統一する
+    ->withConfiguredRule(RenameClassRector::class, [
+        'Symfony\Component\Routing\Annotation\Route' => 'Symfony\Component\Routing\Attribute\Route',
+    ])
+    ->withImportNames(
+        importShortClasses: false,
+        importDocBlockNames: true,
+        importNames: true
+    )
+    ->withParallel();
diff --git a/Resource/template/admin/order_edit.twig b/Resource/template/admin/order_edit.twig
index 2c23366..55fc313 100644
--- a/Resource/template/admin/order_edit.twig
+++ b/Resource/template/admin/order_edit.twig
@@ -96,9 +96,9 @@
             </div>
             <div class="card-body">
                 決済状況変更のテストはこちらから:
-                <a target="_blank" href="{{ url('sample_payment_receive_cvs_status') }}?no={{ Order.orderNo }}&cvs_status={{ constant('Plugin\\SamplePayment\\Entity\\CvsPaymentStatus::COMPLETE') }}">決済完了</a>
-                <a target="_blank" href="{{ url('sample_payment_receive_cvs_status') }}?no={{ Order.orderNo }}&cvs_status={{ constant('Plugin\\SamplePayment\\Entity\\CvsPaymentStatus::EXPIRED') }}">期限切れ</a>
-                <a target="_blank" href="{{ url('sample_payment_receive_cvs_status') }}?no={{ Order.orderNo }}&cvs_status={{ constant('Plugin\\SamplePayment\\Entity\\CvsPaymentStatus::FAILURE') }}">決済失敗</a> 
+                <a target="_blank" href="{{ url('sample_payment_receive_cvs_status') }}?no={{ Order.orderNo }}&cvs_status={{ constant('Plugin\\SamplePayment44\\Entity\\CvsPaymentStatus::COMPLETE') }}">決済完了</a>
+                <a target="_blank" href="{{ url('sample_payment_receive_cvs_status') }}?no={{ Order.orderNo }}&cvs_status={{ constant('Plugin\\SamplePayment44\\Entity\\CvsPaymentStatus::EXPIRED') }}">期限切れ</a>
+                <a target="_blank" href="{{ url('sample_payment_receive_cvs_status') }}?no={{ Order.orderNo }}&cvs_status={{ constant('Plugin\\SamplePayment44\\Entity\\CvsPaymentStatus::FAILURE') }}">決済失敗</a> 
             </div>
         </div>
     </div>
diff --git a/Resource/template/credit.twig b/Resource/template/credit.twig
index 49e807f..d370bc6 100644
--- a/Resource/template/credit.twig
+++ b/Resource/template/credit.twig
@@ -3,7 +3,7 @@
      $(".ec-orderPayment").last().after($("#credit").detach());
  });
 </script>
-{% if Order.Payment.getMethodClass == 'Plugin\\SamplePayment42\\Service\\Method\\CreditCard' %}
+{% if Order.Payment.getMethodClass == 'Plugin\\SamplePayment44\\Service\\Method\\CreditCard' %}
     <div id="credit" class="ec-orderPaymentCard">
         <div class="ec-rectHeading">
             <h2>カード(暫定実装)</h2>
diff --git a/Resource/template/credit_confirm.twig b/Resource/template/credit_confirm.twig
index 057f9d4..b5e36d6 100644
--- a/Resource/template/credit_confirm.twig
+++ b/Resource/template/credit_confirm.twig
@@ -1,4 +1,4 @@
-{% if Order.Payment.method_class == 'Plugin\\SamplePayment42\\Service\\Method\\CreditCard' %}
+{% if Order.Payment.method_class == 'Plugin\\SamplePayment44\\Service\\Method\\CreditCard' %}
     <script>
      $(function () {
          $(".ec-orderPayment").last().after($("#credit").detach());
diff --git a/Resource/template/cvs.twig b/Resource/template/cvs.twig
index bcdf186..62b42cd 100644
--- a/Resource/template/cvs.twig
+++ b/Resource/template/cvs.twig
@@ -1,8 +1,8 @@
 {#
     Shopping/index.twigに以下のスニペットを追記
-    {{ include('@SamplePayment/cvs.twig', ignore_missing=true) }}
+    {{ include('@SamplePayment44/cvs.twig', ignore_missing=true) }}
 #}
-{% if Order.Payment.getMethodClass == 'Plugin\\SamplePayment\\Service\\Method\\Convenience' %}
+{% if Order.Payment.getMethodClass == 'Plugin\\SamplePayment44\\Service\\Method\\Convenience' %}
     <div class="ec-orderPayment">
         <div class="ec-rectHeading">
             <h2>コンビニ決済</h2>
diff --git a/Resource/template/cvs_confirm.twig b/Resource/template/cvs_confirm.twig
index ca2e631..be6c38b 100644
--- a/Resource/template/cvs_confirm.twig
+++ b/Resource/template/cvs_confirm.twig
@@ -1,8 +1,8 @@
 {#
     Shopping/confirm.twigに以下のスニペットを追記
-    {{ include('@SamplePayment/cvs_confirm.twig', ignore_missing=true) }}
+    {{ include('@SamplePayment44/cvs_confirm.twig', ignore_missing=true) }}
 #}
-{% if Order.Payment.getMethodClass == 'Plugin\\SamplePayment\\Service\\Method\\Convenience' %}
+{% if Order.Payment.getMethodClass == 'Plugin\\SamplePayment44\\Service\\Method\\Convenience' %}
     <div class="ec-orderPayment">
         <div class="ec-rectHeading">
             <h2>コンビニ決済</h2>
diff --git a/SamplePaymentEvent.php b/SamplePaymentEvent.php
index 7cd37dc..48481ec 100644
--- a/SamplePaymentEvent.php
+++ b/SamplePaymentEvent.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42;
+namespace Plugin\SamplePayment44;
 
 use Eccube\Event\TemplateEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
@@ -33,7 +33,7 @@ class SamplePaymentEvent implements EventSubscriberInterface
      *
      * {@inheritdoc}
      */
-    public static function getSubscribedEvents()
+    public static function getSubscribedEvents(): array
     {
         return [
             'Shopping/index.twig' => 'onShoppingIndexTwig',
@@ -45,17 +45,17 @@ public static function getSubscribedEvents()
 
     public function onShoppingIndexTwig(TemplateEvent $event)
     {
-        $event->addSnippet('@SamplePayment42/credit.twig');
+        $event->addSnippet('@SamplePayment44/credit.twig');
     }
 
     public function onShoppingConfirmTwig(TemplateEvent $event)
     {
-        $event->addSnippet('@SamplePayment42/credit_confirm.twig');
+        $event->addSnippet('@SamplePayment44/credit_confirm.twig');
     }
 
     public function onAdminOrderEditTwig(TemplateEvent $event)
     {
-        $event->addSnippet('@SamplePayment42/admin/order_edit.twig');
+        $event->addSnippet('@SamplePayment44/admin/order_edit.twig');
     }
 
     public function onMypageNaviTwig(TemplateEvent $event)
diff --git a/SamplePaymentNav.php b/SamplePaymentNav.php
index e8dd82b..f394dc4 100644
--- a/SamplePaymentNav.php
+++ b/SamplePaymentNav.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42;
+namespace Plugin\SamplePayment44;
 
 use Eccube\Common\EccubeNav;
 
@@ -20,7 +20,7 @@ class SamplePaymentNav implements EccubeNav
     /**
      * @return array
      */
-    public static function getNav()
+    public static function getNav(): array
     {
         return [
             'order' => [
diff --git a/SamplePaymentTwigBlock.php b/SamplePaymentTwigBlock.php
index 484bdac..68326a1 100644
--- a/SamplePaymentTwigBlock.php
+++ b/SamplePaymentTwigBlock.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42;
+namespace Plugin\SamplePayment44;
 
 use Eccube\Common\EccubeTwigBlock;
 
@@ -20,11 +20,11 @@ class SamplePaymentTwigBlock implements EccubeTwigBlock
     /**
      * @return array
      */
-    public static function getTwigBlock()
+    public static function getTwigBlock(): array
     {
         return [
-            '@SamplePayment/credit.twig',
-            '@SamplePayment/credit_confirm.twig',
+            '@SamplePayment44/credit.twig',
+            '@SamplePayment44/credit_confirm.twig',
         ];
     }
 }
diff --git a/Service/Method/Convenience.php b/Service/Method/Convenience.php
index 4a3cb7e..622900e 100644
--- a/Service/Method/Convenience.php
+++ b/Service/Method/Convenience.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Service\Method;
+namespace Plugin\SamplePayment44\Service\Method;
 
 use Eccube\Entity\Master\OrderStatus;
 use Eccube\Entity\Order;
@@ -22,10 +22,9 @@
 use Eccube\Service\Payment\PaymentResult;
 use Eccube\Service\PurchaseFlow\PurchaseContext;
 use Eccube\Service\PurchaseFlow\PurchaseFlow;
-use Plugin\SamplePayment42\Entity\CvsPaymentStatus;
-use Plugin\SamplePayment42\Repository\CvsPaymentStatusRepository;
+use Plugin\SamplePayment44\Entity\CvsPaymentStatus;
+use Plugin\SamplePayment44\Repository\CvsPaymentStatusRepository;
 use Symfony\Component\Form\FormInterface;
-use Symfony\Component\HttpFoundation\RedirectResponse;
 
 /**
  * コンビニ払いの決済処理を行う
@@ -35,27 +34,12 @@ class Convenience implements PaymentMethodInterface
     /**
      * @var Order
      */
-    private $Order;
+    private Order $Order;
 
     /**
      * @var FormInterface
      */
-    private $form;
-
-    /**
-     * @var OrderStatusRepository
-     */
-    private $orderStatusRepository;
-
-    /**
-     * @var CvsPaymentStatusRepository
-     */
-    private $cvsPaymentStatusRepository;
-
-    /**
-     * @var PurchaseFlow
-     */
-    private $purchaseFlow;
+    private FormInterface $form;
 
     /**
      * LinkCreditCard constructor.
@@ -64,14 +48,8 @@ class Convenience implements PaymentMethodInterface
      * @param CvsPaymentStatusRepository $cvsPaymentStatusRepository
      * @param PurchaseFlow $shoppingPurchaseFlow
      */
-    public function __construct(
-        OrderStatusRepository $orderStatusRepository,
-        CvsPaymentStatusRepository $cvsPaymentStatusRepository,
-        PurchaseFlow $shoppingPurchaseFlow
-    ) {
-        $this->orderStatusRepository = $orderStatusRepository;
-        $this->cvsPaymentStatusRepository = $cvsPaymentStatusRepository;
-        $this->purchaseFlow = $shoppingPurchaseFlow;
+    public function __construct(private readonly OrderStatusRepository $orderStatusRepository, private readonly CvsPaymentStatusRepository $cvsPaymentStatusRepository, private readonly PurchaseFlow $shoppingPurchaseFlow)
+    {
     }
 
     /**
@@ -79,14 +57,11 @@ public function __construct(
      *
      * コンビニ決済は使用しない.
      *
-     * @return PaymentResult|void
+     * @return PaymentResult|bool
      */
-    public function verify()
+    public function verify(): PaymentResult|bool
     {
-        $result = new PaymentResult();
-        $result->setSuccess(true);
-
-        return $result;
+        return false;
     }
 
     /**
@@ -94,11 +69,11 @@ public function verify()
      *
      * 決済サーバのカード入力画面へリダイレクトする.
      *
-     * @return PaymentDispatcher
+     * @return PaymentDispatcher|bool
      *
      * @throws ShoppingException
      */
-    public function apply()
+    public function apply(): PaymentDispatcher|bool
     {
         // 受注ステータスを決済処理中へ変更
         $OrderStatus = $this->orderStatusRepository->find(OrderStatus::PENDING);
@@ -109,8 +84,9 @@ public function apply()
         $this->Order->setSamplePaymentCvsPaymentStatus($PaymentStatus);
 
         // purchaseFlow::prepareを呼び出し, 購入処理を進める.
-        $this->purchaseFlow->prepare($this->Order, new PurchaseContext());
-        return null;
+        $this->shoppingPurchaseFlow->prepare($this->Order, new PurchaseContext());
+
+        return false;
     }
 
     /**
@@ -118,7 +94,7 @@ public function apply()
      *
      * @return PaymentResult
      */
-    public function checkout()
+    public function checkout(): PaymentResult
     {
         // 決済サーバとの通信処理(コンビニ払い込み情報等の取得)
         // ...
@@ -139,7 +115,7 @@ public function checkout()
             $this->Order->appendCompleteMailMessage($message);
 
             // purchaseFlow::commitを呼び出し, 購入処理を完了させる.
-            $this->purchaseFlow->commit($this->Order, new PurchaseContext());
+            $this->shoppingPurchaseFlow->commit($this->Order, new PurchaseContext());
         } else {
             // 受注ステータスを購入処理中へ変更
             $OrderStatus = $this->orderStatusRepository->find(OrderStatus::PROCESSING);
@@ -152,7 +128,7 @@ public function checkout()
             $result->setErrors([trans('sample_payment.shopping.cvs.error')]);
 
             // 失敗時はpurchaseFlow::rollbackを呼び出す.
-            $this->purchaseFlow->rollback($this->Order, new PurchaseContext());
+            $this->shoppingPurchaseFlow->rollback($this->Order, new PurchaseContext());
         }
 
         return $result;
@@ -161,16 +137,20 @@ public function checkout()
     /**
      * {@inheritdoc}
      */
-    public function setFormType(FormInterface $form)
+    public function setFormType(FormInterface $form): PaymentMethodInterface
     {
         $this->form = $form;
+
+        return $this;
     }
 
     /**
      * {@inheritdoc}
      */
-    public function setOrder(Order $Order)
+    public function setOrder(Order $Order): PaymentMethodInterface
     {
         $this->Order = $Order;
+
+        return $this;
     }
 }
diff --git a/Service/Method/CreditCard.php b/Service/Method/CreditCard.php
index 32e408b..f906421 100644
--- a/Service/Method/CreditCard.php
+++ b/Service/Method/CreditCard.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Service\Method;
+namespace Plugin\SamplePayment44\Service\Method;
 
 use Eccube\Entity\Master\OrderStatus;
 use Eccube\Entity\Order;
@@ -20,9 +20,10 @@
 use Eccube\Service\Payment\PaymentMethodInterface;
 use Eccube\Service\Payment\PaymentResult;
 use Eccube\Service\PurchaseFlow\PurchaseContext;
+use Eccube\Service\PurchaseFlow\PurchaseException;
 use Eccube\Service\PurchaseFlow\PurchaseFlow;
-use Plugin\SamplePayment42\Entity\PaymentStatus;
-use Plugin\SamplePayment42\Repository\PaymentStatusRepository;
+use Plugin\SamplePayment44\Entity\PaymentStatus;
+use Plugin\SamplePayment44\Repository\PaymentStatusRepository;
 use Symfony\Component\Form\FormInterface;
 
 /**
@@ -33,27 +34,12 @@ class CreditCard implements PaymentMethodInterface
     /**
      * @var Order
      */
-    protected $Order;
+    protected Order $Order;
 
     /**
      * @var FormInterface
      */
-    protected $form;
-
-    /**
-     * @var OrderStatusRepository
-     */
-    private $orderStatusRepository;
-
-    /**
-     * @var PaymentStatusRepository
-     */
-    private $paymentStatusRepository;
-
-    /**
-     * @var PurchaseFlow
-     */
-    private $purchaseFlow;
+    protected FormInterface $form;
 
     /**
      * CreditCard constructor.
@@ -62,14 +48,8 @@ class CreditCard implements PaymentMethodInterface
      * @param PaymentStatusRepository $paymentStatusRepository
      * @param PurchaseFlow $shoppingPurchaseFlow
      */
-    public function __construct(
-        OrderStatusRepository $orderStatusRepository,
-        PaymentStatusRepository $paymentStatusRepository,
-        PurchaseFlow $shoppingPurchaseFlow
-    ) {
-        $this->orderStatusRepository = $orderStatusRepository;
-        $this->paymentStatusRepository = $paymentStatusRepository;
-        $this->purchaseFlow = $shoppingPurchaseFlow;
+    public function __construct(private readonly OrderStatusRepository $orderStatusRepository, private readonly PaymentStatusRepository $paymentStatusRepository, private readonly PurchaseFlow $shoppingPurchaseFlow)
+    {
     }
 
     /**
@@ -77,26 +57,27 @@ public function __construct(
      *
      * クレジットカードの有効性チェックを行う.
      *
-     * @return PaymentResult
+     * @return PaymentResult|bool 成功時は false を返す(EC-CUBE 4.4 以降の仕様)
      *
-     * @throws \Eccube\Service\PurchaseFlow\PurchaseException
+     * @throws PurchaseException
      */
-    public function verify()
+    public function verify(): PaymentResult|bool
     {
         // 決済サーバとの通信処理(有効性チェックやカード番号の下4桁取得)
         // ...
         //
 
         if (true) {
-            $result = new PaymentResult();
-            $result->setSuccess(true);
+            // 成功: カード下4桁を設定して確認画面へ進む
             $this->Order->setSamplePaymentCardNoLast4('****-*****-****-1234');
-        } else {
-            $result = new PaymentResult();
-            $result->setSuccess(false);
-            $result->setErrors([trans('sample_payment.shopping.verify.error')]);
+
+            return false;
         }
 
+        $result = new PaymentResult();
+        $result->setSuccess(false);
+        $result->setErrors([trans('sample_payment.shopping.verify.error')]);
+
         return $result;
     }
 
@@ -106,9 +87,9 @@ public function verify()
      * 受注ステータス, 決済ステータスを更新する.
      * ここでは決済サーバとの通信は行わない.
      *
-     * @return PaymentDispatcher|null
+     * @return PaymentDispatcher|bool
      */
-    public function apply()
+    public function apply(): PaymentDispatcher|bool
     {
         // 受注ステータスを決済処理中へ変更
         $OrderStatus = $this->orderStatusRepository->find(OrderStatus::PENDING);
@@ -119,7 +100,9 @@ public function apply()
         $this->Order->setSamplePaymentPaymentStatus($PaymentStatus);
 
         // purchaseFlow::prepareを呼び出し, 購入処理を進める.
-        $this->purchaseFlow->prepare($this->Order, new PurchaseContext());
+        $this->shoppingPurchaseFlow->prepare($this->Order, new PurchaseContext());
+
+        return false;
     }
 
     /**
@@ -129,7 +112,7 @@ public function apply()
      *
      * @return PaymentResult
      */
-    public function checkout()
+    public function checkout(): PaymentResult
     {
         // 決済サーバに仮売上のリクエスト送る(設定等によって送るリクエストは異なる)
         // ...
@@ -150,7 +133,7 @@ public function checkout()
             $this->Order->appendCompleteMailMessage('トークン -> '.$token);
 
             // purchaseFlow::commitを呼び出し, 購入処理を完了させる.
-            $this->purchaseFlow->commit($this->Order, new PurchaseContext());
+            $this->shoppingPurchaseFlow->commit($this->Order, new PurchaseContext());
 
             $result = new PaymentResult();
             $result->setSuccess(true);
@@ -164,7 +147,7 @@ public function checkout()
             $this->Order->setSamplePaymentPaymentStatus($PaymentStatus);
 
             // 失敗時はpurchaseFlow::rollbackを呼び出す.
-            $this->purchaseFlow->rollback($this->Order, new PurchaseContext());
+            $this->shoppingPurchaseFlow->rollback($this->Order, new PurchaseContext());
 
             $result = new PaymentResult();
             $result->setSuccess(false);
@@ -177,16 +160,20 @@ public function checkout()
     /**
      * {@inheritdoc}
      */
-    public function setFormType(FormInterface $form)
+    public function setFormType(FormInterface $form): PaymentMethodInterface
     {
         $this->form = $form;
+
+        return $this;
     }
 
     /**
      * {@inheritdoc}
      */
-    public function setOrder(Order $Order)
+    public function setOrder(Order $Order): PaymentMethodInterface
     {
         $this->Order = $Order;
+
+        return $this;
     }
 }
diff --git a/Service/Method/LinkCreditCard.php b/Service/Method/LinkCreditCard.php
index eca8973..477d7e8 100755
--- a/Service/Method/LinkCreditCard.php
+++ b/Service/Method/LinkCreditCard.php
@@ -11,7 +11,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Plugin\SamplePayment42\Service\Method;
+namespace Plugin\SamplePayment44\Service\Method;
 
 use Eccube\Entity\Master\OrderStatus;
 use Eccube\Entity\Order;
@@ -22,8 +22,8 @@
 use Eccube\Service\Payment\PaymentResult;
 use Eccube\Service\PurchaseFlow\PurchaseContext;
 use Eccube\Service\PurchaseFlow\PurchaseFlow;
-use Plugin\SamplePayment42\Entity\PaymentStatus;
-use Plugin\SamplePayment42\Repository\PaymentStatusRepository;
+use Plugin\SamplePayment44\Entity\PaymentStatus;
+use Plugin\SamplePayment44\Repository\PaymentStatusRepository;
 use Symfony\Component\Form\FormInterface;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 
@@ -35,27 +35,12 @@ class LinkCreditCard implements PaymentMethodInterface
     /**
      * @var Order
      */
-    private $Order;
+    private Order $Order;
 
     /**
      * @var FormInterface
      */
-    private $form;
-
-    /**
-     * @var OrderStatusRepository
-     */
-    private $orderStatusRepository;
-
-    /**
-     * @var PaymentStatusRepository
-     */
-    private $paymentStatusRepository;
-
-    /**
-     * @var PurchaseFlow
-     */
-    private $purchaseFlow;
+    private FormInterface $form;
 
     /**
      * LinkCreditCard constructor.
@@ -64,14 +49,8 @@ class LinkCreditCard implements PaymentMethodInterface
      * @param PaymentStatusRepository $paymentStatusRepository
      * @param PurchaseFlow $shoppingPurchaseFlow
      */
-    public function __construct(
-        OrderStatusRepository $orderStatusRepository,
-        PaymentStatusRepository $paymentStatusRepository,
-        PurchaseFlow $shoppingPurchaseFlow
-    ) {
-        $this->orderStatusRepository = $orderStatusRepository;
-        $this->paymentStatusRepository = $paymentStatusRepository;
-        $this->purchaseFlow = $shoppingPurchaseFlow;
+    public function __construct(private readonly OrderStatusRepository $orderStatusRepository, private readonly PaymentStatusRepository $paymentStatusRepository, private readonly PurchaseFlow $shoppingPurchaseFlow)
+    {
     }
 
     /**
@@ -79,14 +58,11 @@ public function __construct(
      *
      * リンク式は使用しない.
      *
-     * @return PaymentResult|void
+     * @return PaymentResult|bool
      */
-    public function verify()
+    public function verify(): PaymentResult|bool
     {
-        $result = new PaymentResult();
-        $result->setSuccess(true);
-
-        return $result;
+        return false;
     }
 
     /**
@@ -98,7 +74,7 @@ public function verify()
      *
      * @throws ShoppingException
      */
-    public function apply()
+    public function apply(): PaymentDispatcher
     {
         // 受注ステータスを決済処理中へ変更
         $OrderStatus = $this->orderStatusRepository->find(OrderStatus::PENDING);
@@ -109,7 +85,7 @@ public function apply()
         $this->Order->setSamplePaymentPaymentStatus($PaymentStatus);
 
         // purchaseFlow::prepareを呼び出し, 購入処理を進める.
-        $this->purchaseFlow->prepare($this->Order, new PurchaseContext());
+        $this->shoppingPurchaseFlow->prepare($this->Order, new PurchaseContext());
 
         // 決済サーバのカード入力画面へリダイレクトする.
         $url = '/payment_company?no='.$this->Order->getOrderNo();
@@ -126,7 +102,7 @@ public function apply()
      *
      * @return PaymentResult
      */
-    public function checkout()
+    public function checkout(): PaymentResult
     {
         $result = new PaymentResult();
         $result->setSuccess(true);
@@ -137,16 +113,20 @@ public function checkout()
     /**
      * {@inheritdoc}
      */
-    public function setFormType(FormInterface $form)
+    public function setFormType(FormInterface $form): PaymentMethodInterface
     {
         $this->form = $form;
+
+        return $this;
     }
 
     /**
      * {@inheritdoc}
      */
-    public function setOrder(Order $Order)
+    public function setOrder(Order $Order): PaymentMethodInterface
     {
         $this->Order = $Order;
+
+        return $this;
     }
 }
diff --git a/composer.json b/composer.json
index faea94c..9069d12 100644
--- a/composer.json
+++ b/composer.json
@@ -1,10 +1,10 @@
 {
-  "name": "ec-cube/samplepayment42",
-  "version": "2.0.0",
+  "name": "ec-cube/samplepayment44",
+  "version": "3.0.0",
   "description": "EC-CUBE Payment Sample Plugin",
   "type": "eccube-plugin",
   "extra": {
-    "code": "SamplePayment42",
+    "code": "SamplePayment44",
     "id": 999999
   },
   "require": {
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index d05e69a..51260f6 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -6,8 +6,8 @@ services:
       /bin/bash -c "
       docker-php-entrypoint ls &&
       composer config repositories.plugin '{\"type\": \"path\", \"url\": \"../plugin\"}' &&
-      bin/console eccube:composer:require ec-cube/samplepayment42 &&
-      bin/console eccube:plugin:enable --code=SamplePayment42 &&
+      bin/console eccube:composer:require ec-cube/samplepayment44 &&
+      bin/console eccube:plugin:enable --code=SamplePayment44 &&
       bin/console doctrine:query:sql \"INSERT INTO dtb_payment_option VALUES(1,7,'paymentoption');\" &&
       bin/console doctrine:query:sql \"INSERT INTO dtb_payment_option VALUES(1,6,'paymentoption');\" &&
       bin/console doctrine:query:sql \"INSERT INTO dtb_payment_option VALUES(1,5,'paymentoption');\" &&
diff --git a/docker-compose.yml b/docker-compose.yml
index 1726a33..2a28fb3 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -19,7 +19,9 @@ volumes:
 services:
   ### ECCube4 ##################################
   ec-cube:
-    image: ghcr.io/ec-cube/ec-cube-php:7.4-apache-4.2
+    ### 別バージョンの PHP でテストする場合は環境変数 TAG を指定します
+    ## TAG=8.3-apache-4.4 docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d --wait
+    image: ${REGISTRY:-ghcr.io}/${IMAGE_NAME:-ec-cube/ec-cube-php}:${TAG:-8.2-apache-4.4}
     ports:
       - 8080:80
       - 4430:443
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 3210844..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,75 +0,0 @@
-{
-  "name": "sample-payment-plugin",
-  "version": "0.9.0",
-  "lockfileVersion": 2,
-  "requires": true,
-  "packages": {
-    "": {
-      "name": "sample-payment-plugin",
-      "version": "1.0.0",
-      "license": "ISC",
-      "dependencies": {
-        "playwright-core": "^1.27.1"
-      },
-      "devDependencies": {
-        "@playwright/test": "^1.27.1"
-      }
-    },
-    "node_modules/@playwright/test": {
-      "version": "1.27.1",
-      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.27.1.tgz",
-      "integrity": "sha512-mrL2q0an/7tVqniQQF6RBL2saskjljXzqNcCOVMUjRIgE6Y38nCNaP+Dc2FBW06bcpD3tqIws/HT9qiMHbNU0A==",
-      "dev": true,
-      "dependencies": {
-        "@types/node": "*",
-        "playwright-core": "1.27.1"
-      },
-      "bin": {
-        "playwright": "cli.js"
-      },
-      "engines": {
-        "node": ">=14"
-      }
-    },
-    "node_modules/@types/node": {
-      "version": "18.11.7",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.7.tgz",
-      "integrity": "sha512-LhFTglglr63mNXUSRYD8A+ZAIu5sFqNJ4Y2fPuY7UlrySJH87rRRlhtVmMHplmfk5WkoJGmDjE9oiTfyX94CpQ==",
-      "dev": true
-    },
-    "node_modules/playwright-core": {
-      "version": "1.27.1",
-      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.27.1.tgz",
-      "integrity": "sha512-9EmeXDncC2Pmp/z+teoVYlvmPWUC6ejSSYZUln7YaP89Z6lpAaiaAnqroUt/BoLo8tn7WYShcfaCh+xofZa44Q==",
-      "bin": {
-        "playwright": "cli.js"
-      },
-      "engines": {
-        "node": ">=14"
-      }
-    }
-  },
-  "dependencies": {
-    "@playwright/test": {
-      "version": "1.27.1",
-      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.27.1.tgz",
-      "integrity": "sha512-mrL2q0an/7tVqniQQF6RBL2saskjljXzqNcCOVMUjRIgE6Y38nCNaP+Dc2FBW06bcpD3tqIws/HT9qiMHbNU0A==",
-      "dev": true,
-      "requires": {
-        "@types/node": "*",
-        "playwright-core": "1.27.1"
-      }
-    },
-    "@types/node": {
-      "version": "18.11.7",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.7.tgz",
-      "integrity": "sha512-LhFTglglr63mNXUSRYD8A+ZAIu5sFqNJ4Y2fPuY7UlrySJH87rRRlhtVmMHplmfk5WkoJGmDjE9oiTfyX94CpQ==",
-      "dev": true
-    },
-    "playwright-core": {
-      "version": "1.27.1",
-      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.27.1.tgz",
-      "integrity": "sha512-9EmeXDncC2Pmp/z+teoVYlvmPWUC6ejSSYZUln7YaP89Z6lpAaiaAnqroUt/BoLo8tn7WYShcfaCh+xofZa44Q=="
-    }
-  }
-}
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 0000000..e262eef
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,26 @@
+# EC-CUBE 本体に組み込んだ状態 (Docker コンテナ内) で実行する前提の設定.
+# bootstrapFiles / objectManagerLoader は本体側の絶対パス (/var/www/html) を参照する.
+# 実行例:
+#   docker compose ... run --rm --no-deps --entrypoint bash ec-cube \
+#     -c 'cd /var/www/plugin && /var/www/html/vendor/bin/phpstan analyse'
+parameters:
+  level: 6
+  bootstrapFiles:
+    - /var/www/html/vendor/autoload.php
+  doctrine:
+    objectManagerLoader: /var/www/html/tests/object-manager.php
+    ormRepositoryClass: Eccube\Repository\AbstractRepository
+  excludePaths:
+    - vendor/*
+    - node_modules/*
+  paths:
+    - Controller
+    - Entity
+    - Form
+    - Repository
+    - Service
+    - Util
+    - PluginManager.php
+    - SamplePaymentEvent.php
+    - SamplePaymentNav.php
+    - SamplePaymentTwigBlock.php
diff --git a/tests/admin_order_edit.test.ts b/tests/admin_order_edit.test.ts
new file mode 100644
index 0000000..4b4f0c3
--- /dev/null
+++ b/tests/admin_order_edit.test.ts
@@ -0,0 +1,128 @@
+import { test, expect, type Page } from '@playwright/test';
+
+/**
+ * 受注編集まわりのリグレッションテスト。
+ *
+ * 1. order_edit.twig の Twig RuntimeError 回帰防止
+ *    受注編集画面へ自動注入される order_edit.twig (`@admin/Order/edit.twig` にフック) が、
+ *    version-less の名前空間 `Plugin\SamplePayment\Entity\CvsPaymentStatus` を
+ *    `constant()` で参照していたため "Constant ... is undefined" の RuntimeError (HTTP 500)
+ *    になっていた。正しい名前空間 `Plugin\SamplePayment44` へ修正したことの回帰防止。
+ *    order_edit.twig の `constant()` は `<div class="d-none">` 内で決済種別に関わらず
+ *    常に評価されるため、修正前はコンビニ注文に限らず全注文の受注編集で再現していた。
+ *
+ * 2. changePrice の bcmath 金額計算サンプルが実行時に動くことの確認
+ *    OrderController::changePrice は bcmath (bcadd/bcsub/bcmul/bcdiv) で金額を計算する
+ *    サンプル。bcmath 拡張が無い環境でも nanasess/bcmath-polyfill 経由で動作することを
+ *    エンドポイント経由で確認する。
+ */
+
+/** ゲストでコンビニ決済の注文を 1 件作成する */
+async function createConviniOrder(page: Page): Promise<void> {
+  await page.goto('/');
+
+  await page.getByRole('link', { name: '新入荷' }).click();
+  await expect(page).toHaveURL('/products/list?category_id=2');
+  await page.locator('li:has-text("チェリーアイスサンド ￥3,080 数量 カートに入れる")').getByRole('button', { name: 'カートに入れる' }).click();
+
+  // EC-CUBE 4.4 ではカートボタンが AJAX リクエストを送るため完了を待ってから遷移
+  await page.waitForLoadState('networkidle');
+  await page.goto('/cart');
+
+  await page.getByRole('link', { name: 'レジに進む' }).click();
+  await expect(page).toHaveURL('/shopping/login');
+
+  await page.getByRole('link', { name: 'ゲスト購入' }).click();
+  await expect(page).toHaveURL('/shopping/nonmember');
+
+  await page.getByPlaceholder('姓').fill('石');
+  await page.getByPlaceholder('名', { exact: true }).fill('九部');
+  await page.getByPlaceholder('セイ').fill('イーシー');
+  await page.getByPlaceholder('メイ').fill('キューブ');
+  await page.getByLabel('会社名').fill('イーシーキューブ');
+  await page.getByPlaceholder('例：5300001').fill('5430001');
+  await page.locator('select[name="nonmember\\[address\\]\\[pref\\]"]').selectOption('1');
+  await page.getByPlaceholder('市区町村名(例：大阪市北区)').fill('aaa');
+  await page.getByPlaceholder('番地・ビル名(例：西梅田1丁目6-8)').fill('1');
+  await page.getByPlaceholder('例：11122223333').fill('0633334444');
+  await page.getByPlaceholder('例：ec-cube@example.com').fill('user@example.com');
+  await page.getByPlaceholder('確認のためもう一度入力してください').fill('user@example.com');
+
+  await page.getByRole('button', { name: '次へ' }).click();
+  await expect(page).toHaveURL('/shopping');
+
+  await page.getByText('コンビニ決済').click();
+
+  await page.getByRole('button', { name: '確認する' }).click();
+  await expect(page).toHaveURL('/shopping/confirm');
+
+  await page.getByRole('button', { name: '注文する' }).click();
+  await expect(page).toHaveURL('/shopping/complete');
+}
+
+/** 管理画面にログインする */
+async function adminLogin(page: Page): Promise<void> {
+  await page.goto('/admin/login');
+  await page.fill('input[name="login_id"]', 'admin');
+  await page.fill('input[name="password"]', 'password');
+  await page.locator('button[type="submit"]').click();
+  await expect(page).toHaveURL('/admin/');
+}
+
+/** 受注一覧から最新の受注編集リンクと受注ID を取得する */
+async function latestOrderEditHref(page: Page): Promise<{ href: string; id: string }> {
+  await page.goto('/admin/order');
+  const href = await page
+    .locator('a[href*="/admin/order/"][href*="/edit"]')
+    .first()
+    .getAttribute('href');
+  expect(href).toBeTruthy();
+  const matched = (href as string).match(/\/admin\/order\/(\d+)\/edit/);
+  expect(matched).toBeTruthy();
+  return { href: href as string, id: (matched as RegExpMatchArray)[1] };
+}
+
+test('受注編集画面が constant() エラーなく描画され決済状況変更リンクが正しい', async ({ page }) => {
+  await createConviniOrder(page);
+  await adminLogin(page);
+
+  const { href } = await latestOrderEditHref(page);
+  const editResponse = await page.goto(href);
+
+  // 修正前は Twig RuntimeError で HTTP 500 になっていた
+  expect(editResponse?.status()).toBe(200);
+  await expect(page.locator('body')).not.toContainText('is undefined');
+  await expect(page.locator('body')).not.toContainText('RuntimeError');
+
+  // constant() が解決され、決済状況変更リンクが正しい cvs_status を持つこと
+  // CvsPaymentStatus::COMPLETE=3 / EXPIRED=5 / FAILURE=4
+  await expect(page.locator('a', { hasText: '決済完了' })).toHaveAttribute('href', /cvs_status=3/);
+  await expect(page.locator('a', { hasText: '期限切れ' })).toHaveAttribute('href', /cvs_status=5/);
+  await expect(page.locator('a', { hasText: '決済失敗' })).toHaveAttribute('href', /cvs_status=4/);
+});
+
+test('決済金額変更(changePrice)が bcmath で計算され HTTP 200 を返す', async ({ page }) => {
+  await createConviniOrder(page);
+  await adminLogin(page);
+
+  const { id } = await latestOrderEditHref(page);
+
+  // 管理画面の AJAX は ECCUBE-CSRF-TOKEN ヘッダで CSRF を検証する
+  const token = await page.getAttribute('meta[name="eccube-csrf-token"]', 'content');
+  expect(token).toBeTruthy();
+
+  // changePrice は決済総額から bcmath で手数料(+)・割引(-)を計算して返すサンプル。
+  // bcmath 拡張が無くても nanasess/bcmath-polyfill 経由で計算できる (= 500 にならない)。
+  const response = await page.request.post(`/admin/sample_payment/order/change_price/${id}`, {
+    headers: {
+      'ECCUBE-CSRF-TOKEN': token as string,
+      'X-Requested-With': 'XMLHttpRequest',
+    },
+  });
+
+  expect(response.status()).toBe(200);
+  const body = await response.json();
+  // bcmath で算出された請求額 (正の整数文字列) が返ること
+  expect(String(body.price)).toMatch(/^\d+$/);
+  expect(Number(body.price)).toBeGreaterThan(0);
+});
diff --git a/tests/guest_convini.test.ts b/tests/guest_convini.test.ts
index 1f4f4eb..73fc19c 100644
--- a/tests/guest_convini.test.ts
+++ b/tests/guest_convini.test.ts
@@ -8,10 +8,9 @@ test('test', async ({ page }) => {
   await expect(page).toHaveURL('/products/list?category_id=2');
   await page.locator('li:has-text("チェリーアイスサンド ￥3,080 数量 カートに入れる")').getByRole('button', { name: 'カートに入れる' }).click();
 
-  // XXX 何故か headless で動かない
-  // await expect(page.getByText('カートに追加しました。')).toBeVisible();
-  // await page.getByRole('link', { name: 'カートへ進む' }).click();
-  await expect(page).toHaveURL('/cart');
+  // EC-CUBE 4.4 ではカートボタンが AJAX リクエストを送るため完了を待ってから遷移
+  await page.waitForLoadState('networkidle');
+  await page.goto('/cart');
 
   await page.getByRole('link', { name: 'レジに進む' }).click();
   await expect(page).toHaveURL('/shopping/login');
diff --git a/tests/guest_credit_link.test.ts b/tests/guest_credit_link.test.ts
index a6f576b..3922047 100644
--- a/tests/guest_credit_link.test.ts
+++ b/tests/guest_credit_link.test.ts
@@ -9,9 +9,9 @@ test('test', async ({ page }) => {
 
   await page.locator('li:has-text("チェリーアイスサンド ￥3,080 数量 カートに入れる")').getByRole('button', { name: 'カートに入れる' }).click();
 
-  // XXX 何故か headless で動かない
-  // await page.getByRole('link', { name: 'カートへ進む' }).click();
-  // await expect(page).toHaveURL('/cart');
+  // EC-CUBE 4.4 ではカートボタンが AJAX リクエストを送るため完了を待ってから遷移
+  await page.waitForLoadState('networkidle');
+  await page.goto('/cart');
 
   await page.getByRole('link', { name: 'レジに進む' }).click();
   await expect(page).toHaveURL('/shopping/login');
diff --git a/tests/guest_credit_token.test.ts b/tests/guest_credit_token.test.ts
index 2aeb384..3c78087 100644
--- a/tests/guest_credit_token.test.ts
+++ b/tests/guest_credit_token.test.ts
@@ -9,9 +9,9 @@ test('test', async ({ page }) => {
 
   await page.locator('li:has-text("チェリーアイスサンド ￥3,080 数量 カートに入れる")').getByRole('button', { name: 'カートに入れる' }).click();
 
-  // XXX 何故か headless で動かない
-  // await page.getByRole('link', { name: 'カートへ進む' }).click();
-  // await expect(page).toHaveURL('/cart');
+  // EC-CUBE 4.4 ではカートボタンが AJAX リクエストを送るため完了を待ってから遷移
+  await page.waitForLoadState('networkidle');
+  await page.goto('/cart');
 
   await page.getByRole('link', { name: 'レジに進む' }).click();
   await expect(page).toHaveURL('/shopping/login');
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..0916e55
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,29 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@playwright/test@^1.27.1":
+  version "1.48.2"
+  resolved "https://registry.yarnpkg.com/@playwright/test/-/test-1.48.2.tgz#87dd40633f980872283404c8142a65744d3f13d6"
+  integrity sha512-54w1xCWfXuax7dz4W2M9uw0gDyh+ti/0K/MxcCUxChFh37kkdxPdfZDw5QBbuPUJHr1CiHJ1hXgSs+GgeQc5Zw==
+  dependencies:
+    playwright "1.48.2"
+
+fsevents@2.3.2:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.3.2.tgz#8a526f78b8fdf4623b709e0b975c52c24c02fd1a"
+  integrity sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==
+
+playwright-core@1.48.2, playwright-core@^1.27.1:
+  version "1.48.2"
+  resolved "https://registry.yarnpkg.com/playwright-core/-/playwright-core-1.48.2.tgz#cd76ed8af61690edef5c05c64721c26a8db2f3d7"
+  integrity sha512-sjjw+qrLFlriJo64du+EK0kJgZzoQPsabGF4lBvsid+3CNIZIYLgnMj9V6JY5VhM2Peh20DJWIVpVljLLnlawA==
+
+playwright@1.48.2:
+  version "1.48.2"
+  resolved "https://registry.yarnpkg.com/playwright/-/playwright-1.48.2.tgz#fca45ae8abdc34835c715718072aaff7e305167e"
+  integrity sha512-NjYvYgp4BPmiwfe31j4gHLa3J7bD2WiBz8Lk2RoSsmX38SVIARZ18VYjxLjAcDsAhA+F4iSEXTSGgjua0rrlgQ==
+  dependencies:
+    playwright-core "1.48.2"
+  optionalDependencies:
+    fsevents "2.3.2"