diff --git a/app/Blog/Services/MarketPurchaseService.php b/app/Blog/Services/MarketPurchaseService.php
new file mode 100644
index 0000000..4597254
--- /dev/null
+++ b/app/Blog/Services/MarketPurchaseService.php
@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Blog\Services;
+
+use App\Blog\Support\PluginManager;
+use App\Models\MarketPackage;
+use Plugins\Neatstudio\Payment\Models\Payment;
+use Plugins\Neatstudio\Payment\Services\PaymentManager;
+use RuntimeException;
+
+class MarketPurchaseService
+{
+    public function __construct(private PluginManager $plugins, private PaymentManager $payment)
+    {
+    }
+
+    /**
+     * 市场条目键：优先 item.name，缺省用下载文件名。
+     */
+    public function itemKey(array $item): string
+    {
+        $name = $item['name'] ?? null;
+
+        if ($name) {
+            return (string) $name;
+        }
+
+        return basename((string) ($item['download_url'] ?? ''), '.zip') ?: uniqid('item-');
+    }
+
+    public function itemType(array $item): string
+    {
+        return $item['type'] ?? 'plugin';
+    }
+
+    public function requiresPayment(array $item): bool
+    {
+        return (int) ($item['price'] ?? 0) > 0;
+    }
+
+    /**
+     * 购买市场商品：创建订单并返回（null = 已购买过，无需重复支付）。
+     */
+    public function purchase(array $item): ?Payment
+    {
+        if (! $this->plugins->isEnabled('neatstudio.payment')) {
+            throw new RuntimeException('付费市场商品需要启用支付插件');
+        }
+
+        $price = (int) ($item['price'] ?? 0);
+
+        if ($price <= 0) {
+            throw new RuntimeException('该商品免费，无需购买');
+        }
+
+        $key = $this->itemKey($item);
+        $type = $this->itemType($item);
+        $user = auth()->user();
+
+        $package = MarketPackage::query()->firstOrCreate(
+            ['item_key' => $key, 'item_type' => $type],
+            [
+                'title' => (string) ($item['title'] ?? $key),
+                'price' => $price,
+                'status' => 'pending',
+                'user_id' => $user?->id,
+            ]
+        );
+
+        if ($package->isPaid()) {
+            return null;
+        }
+
+        return $this->payment->createOrder(
+            $user ?? $this->systemUser(),
+            '购买商品：'.$package->title,
+            $price,
+            $package,
+            'alipay'
+        );
+    }
+
+    public function isPurchased(string $key, string $type = 'plugin'): bool
+    {
+        return MarketPackage::query()
+            ->where('item_key', $key)
+            ->where('item_type', $type)
+            ->where('status', 'paid')
+            ->exists();
+    }
+
+    /**
+     * 校验市场条目可否安装：免费直接装，付费需已购买。
+     */
+    public function assertCanInstall(array $item): void
+    {
+        if ($this->requiresPayment($item) && ! $this->isPurchased($this->itemKey($item), $this->itemType($item))) {
+            throw new RuntimeException('该商品为付费商品，请先购买后再安装');
+        }
+    }
+
+    private function systemUser(): \App\Models\User
+    {
+        $user = \App\Models\User::query()->first();
+
+        if (! $user) {
+            throw new RuntimeException('无可用用户创建订单，请先登录');
+        }
+
+        return $user;
+    }
+}
diff --git a/app/Blog/Services/MarketplaceClient.php b/app/Blog/Services/MarketplaceClient.php
index c70110c..7339599 100644
--- a/app/Blog/Services/MarketplaceClient.php
+++ b/app/Blog/Services/MarketplaceClient.php
@@ -29,7 +29,16 @@ class MarketplaceClient
 
         $response->throw();
 
-        return $response->json('items', []);
+        $items = $response->json('items', []);
+
+        // 规范化市场契约：price 分、type（plugin/theme）、name
+        return array_map(function (array $item) {
+            $item['price'] = (int) ($item['price'] ?? 0);
+            $item['type'] = $item['type'] ?? 'plugin';
+            $item['name'] = $item['name'] ?? null;
+
+            return $item;
+        }, is_array($items) ? $items : []);
     }
 
     public function download(string $url): string
diff --git a/app/Filament/Pages/Plugins.php b/app/Filament/Pages/Plugins.php
index 24fff39..ac993cf 100644
--- a/app/Filament/Pages/Plugins.php
+++ b/app/Filament/Pages/Plugins.php
@@ -6,6 +6,7 @@ declare(strict_types=1);
 namespace App\Filament\Pages;
 
 use App\Blog\Services\MarketplaceClient;
+use App\Blog\Services\MarketPurchaseService;
 use App\Blog\Services\PackageInstaller;
 use App\Blog\Support\PluginManager;
 use Filament\Notifications\Notification;
@@ -88,8 +89,12 @@ class Plugins extends Page
     public function loadMarket(): void
     {
         try {
-            $this->marketItems = app(MarketplaceClient::class)->items();
-            Notification::make()->title('市场已刷新：'.count($this->marketItems).' 个包')->success()->send();
+            $items = app(MarketplaceClient::class)->items();
+            $this->marketItems = array_values(array_filter(
+                $items,
+                fn (array $item) => ($item['type'] ?? 'plugin') === 'plugin'
+            ));
+            Notification::make()->title('市场已刷新：'.count($this->marketItems).' 个插件')->success()->send();
         } catch (\Throwable $e) {
             Notification::make()->title('市场加载失败')->body($e->getMessage())->danger()->send();
         }
@@ -104,6 +109,9 @@ class Plugins extends Page
         }
 
         try {
+            // 付费商品需先购买
+            app(MarketPurchaseService::class)->assertCanInstall($item);
+
             $result = app(PackageInstaller::class)->installFromMarket($item);
             Notification::make()->title('安装成功：'.$result['key'])->success()->send();
         } catch (\Throwable $e) {
@@ -111,6 +119,43 @@ class Plugins extends Page
         }
     }
 
+    public function purchaseMarketItem(string $index)
+    {
+        $item = $this->marketItems[(int) $index] ?? null;
+
+        if (! $item) {
+            return;
+        }
+
+        try {
+            $payment = app(MarketPurchaseService::class)->purchase($item);
+
+            if (! $payment) {
+                Notification::make()->title('该商品已购买')->info()->send();
+
+                return;
+            }
+
+            return redirect()->route('pay.checkout', $payment);
+        } catch (\Throwable $e) {
+            Notification::make()->title('购买失败')->body($e->getMessage())->danger()->send();
+        }
+    }
+
+    public function isMarketPurchased(string $index): bool
+    {
+        $item = $this->marketItems[(int) $index] ?? null;
+
+        if (! $item) {
+            return false;
+        }
+
+        return app(MarketPurchaseService::class)->isPurchased(
+            app(MarketPurchaseService::class)->itemKey($item),
+            app(MarketPurchaseService::class)->itemType($item)
+        );
+    }
+
     public function getMarketConfiguredProperty(): bool
     {
         return (bool) config('market.url');
diff --git a/app/Filament/Pages/Themes.php b/app/Filament/Pages/Themes.php
index 0f6298b..01b4f3b 100644
--- a/app/Filament/Pages/Themes.php
+++ b/app/Filament/Pages/Themes.php
@@ -5,6 +5,8 @@ declare(strict_types=1);
 
 namespace App\Filament\Pages;
 
+use App\Blog\Services\MarketplaceClient;
+use App\Blog\Services\MarketPurchaseService;
 use App\Blog\Services\PackageInstaller;
 use App\Blog\Support\ThemeManager;
 use Filament\Notifications\Notification;
@@ -27,6 +29,8 @@ class Themes extends Page
 
     public $zip;
 
+    public array $marketItems = [];
+
     public function getThemesProperty(): array
     {
         return app(ThemeManager::class)->all();
@@ -67,4 +71,78 @@ class Themes extends Page
             Notification::make()->title('删除失败')->body($e->getMessage())->danger()->send();
         }
     }
+
+    public function loadThemeMarket(): void
+    {
+        try {
+            $items = app(MarketplaceClient::class)->items();
+            $this->marketItems = array_values(array_filter(
+                $items,
+                fn (array $item) => ($item['type'] ?? 'plugin') === 'theme'
+            ));
+            Notification::make()->title('市场已刷新：'.count($this->marketItems).' 个主题')->success()->send();
+        } catch (\Throwable $e) {
+            Notification::make()->title('市场加载失败')->body($e->getMessage())->danger()->send();
+        }
+    }
+
+    public function installFromThemeMarket(string $index): void
+    {
+        $item = $this->marketItems[(int) $index] ?? null;
+
+        if (! $item) {
+            return;
+        }
+
+        try {
+            app(MarketPurchaseService::class)->assertCanInstall($item);
+
+            $result = app(PackageInstaller::class)->installFromMarket($item);
+            Notification::make()->title('主题安装成功：'.$result['key'])->success()->send();
+        } catch (\Throwable $e) {
+            Notification::make()->title('安装失败')->body($e->getMessage())->danger()->send();
+        }
+    }
+
+    public function purchaseThemeMarketItem(string $index)
+    {
+        $item = $this->marketItems[(int) $index] ?? null;
+
+        if (! $item) {
+            return;
+        }
+
+        try {
+            $payment = app(MarketPurchaseService::class)->purchase($item);
+
+            if (! $payment) {
+                Notification::make()->title('该商品已购买')->info()->send();
+
+                return;
+            }
+
+            return redirect()->route('pay.checkout', $payment);
+        } catch (\Throwable $e) {
+            Notification::make()->title('购买失败')->body($e->getMessage())->danger()->send();
+        }
+    }
+
+    public function isThemeMarketPurchased(string $index): bool
+    {
+        $item = $this->marketItems[(int) $index] ?? null;
+
+        if (! $item) {
+            return false;
+        }
+
+        return app(MarketPurchaseService::class)->isPurchased(
+            app(MarketPurchaseService::class)->itemKey($item),
+            app(MarketPurchaseService::class)->itemType($item)
+        );
+    }
+
+    public function getMarketConfiguredProperty(): bool
+    {
+        return (bool) config('market.url');
+    }
 }
diff --git a/app/Models/MarketPackage.php b/app/Models/MarketPackage.php
new file mode 100644
index 0000000..88b37d8
--- /dev/null
+++ b/app/Models/MarketPackage.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Plugins\Neatstudio\Payment\Models\Payment;
+
+class MarketPackage extends Model
+{
+    protected $fillable = [
+        'item_key', 'item_type', 'title', 'price', 'status', 'payment_id', 'user_id',
+    ];
+
+    public function payment(): BelongsTo
+    {
+        return $this->belongsTo(Payment::class);
+    }
+
+    public function isPaid(): bool
+    {
+        return $this->status === 'paid';
+    }
+
+    public function markPaid(Payment $payment): void
+    {
+        $this->update([
+            'status' => 'paid',
+            'payment_id' => $payment->id,
+        ]);
+    }
+
+    /**
+     * 作为可购买实体（市场商品）的展示约定。
+     */
+    public function payableLabel(): string
+    {
+        return '市场商品：'.$this->title;
+    }
+
+    public function payableUrl(): ?string
+    {
+        return null;
+    }
+}
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 91e43ff..de18d7a 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -19,6 +19,23 @@ class AppServiceProvider extends ServiceProvider
         //
     }
 
+    private function registerMarketPurchaseListener(): void
+    {
+        $manager = app(\App\Blog\Support\PluginManager::class);
+
+        if (! $manager->isEnabled('neatstudio.payment')) {
+            return;
+        }
+
+        $manager->addAction('payment.paid', function (\Plugins\Neatstudio\Payment\Models\Payment $payment) {
+            $payable = $payment->payable;
+
+            if ($payable instanceof \App\Models\MarketPackage) {
+                $payable->markPaid($payment);
+            }
+        }, 10);
+    }
+
     /**
      * Bootstrap any application services.
      */
@@ -29,6 +46,9 @@ class AppServiceProvider extends ServiceProvider
             $this->loadMigrationsFrom($path);
         }
 
+        // 商城付费：支付成功标记市场商品已购（仅当支付插件启用时注册）
+        $this->registerMarketPurchaseListener();
+
         // 前台页面缓存（匿名 GET，缓存含 SEO 注入后的最终 HTML）
         app('router')->pushMiddlewareToGroup('web', \App\Blog\Support\PageCacheMiddleware::class);
 
diff --git a/database/migrations/2026_08_12_200000_create_market_packages_table.php b/database/migrations/2026_08_12_200000_create_market_packages_table.php
new file mode 100644
index 0000000..e51d2a1
--- /dev/null
+++ b/database/migrations/2026_08_12_200000_create_market_packages_table.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('market_packages', function (Blueprint $table) {
+            $table->id();
+            $table->string('item_key', 190);
+            $table->string('item_type', 20); // plugin / theme
+            $table->string('title', 255);
+            $table->unsignedBigInteger('price'); // 单位：分
+            $table->string('status', 20)->default('pending'); // pending / paid
+            $table->foreignId('payment_id')->nullable()->constrained()->nullOnDelete();
+            $table->foreignId('user_id')->nullable()->constrained()->nullOnDelete();
+            $table->timestamps();
+
+            $table->unique(['item_key', 'item_type']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('market_packages');
+    }
+};
diff --git a/docs/plugins.md b/docs/plugins.md
index b972734..d3d9795 100644
--- a/docs/plugins.md
+++ b/docs/plugins.md
@@ -158,6 +158,31 @@ public function payableUrl(): ?string  { return route('filament.admin.resources.
 - 后台「插件管理」→ 上传 ZIP 安装，或配置远程市场 `MARKET_URL`
 - 内置插件（config/plugins.php enabled 列表）不可卸载，只能停用
 
+## 远程市场契约
+
+配置 `MARKET_URL` 后，后台「插件管理 / 主题管理」会请求 `{MARKET_URL}/items`（`market.token` 作为 Bearer Token），响应格式：
+
+```json
+{
+    "items": [
+        {
+            "name": "vendor.demo",
+            "type": "plugin",
+            "title": "演示插件",
+            "description": "描述",
+            "version": "1.0.0",
+            "author": "作者",
+            "price": 9900,
+            "download_url": "https://example.com/vendor.demo.zip"
+        }
+    ]
+}
+```
+
+- `name`：包键（插件为 `vendor.name`，主题为主题名），**购买授权按此键记录**
+- `type`：`plugin` / `theme`——插件市场 Tab 只显示 plugin，主题市场 Tab 只显示 theme
+- `price`：价格（分），`0` = 免费；`> 0` 显示「购买」按钮，走 `Payment` 订单（可 `payable` 为 `MarketPackage`），支付成功后标记已购，未购买无法安装
+
 ## 异步任务（配合 Workerman）
 
 实现 `App\Blog\Jobs\AiJob` 接口并在 Workerman 常驻进程执行：
diff --git a/resources/views/filament/pages/plugins.blade.php b/resources/views/filament/pages/plugins.blade.php
index 6806678..ce35941 100644
--- a/resources/views/filament/pages/plugins.blade.php
+++ b/resources/views/filament/pages/plugins.blade.php
@@ -66,19 +66,32 @@
         </div>
         <div style="display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem">
             @forelse($marketItems as $index => $item)
+                @php $marketPaid = $item['price'] > 0; @endphp
                 <x-filament::section :compact="true">
                     <div class="flex flex-col">
-                        <x-filament::icon icon="heroicon-o-cloud-arrow-down" class="h-8 w-8 text-primary-600" />
+                        <div class="flex items-start justify-between gap-3">
+                            <x-filament::icon icon="heroicon-o-cloud-arrow-down" class="h-8 w-8 text-primary-600" />
+                            @if($marketPaid)
+                                <x-filament::badge color="warning">¥{{ number_format($item['price'] / 100, 2) }}</x-filament::badge>
+                            @else
+                                <x-filament::badge color="success">免费</x-filament::badge>
+                            @endif
+                        </div>
                         <h3 class="mt-3 text-base font-semibold">{{ $item['title'] ?? $item['name'] }}</h3>
                         <p class="mt-1 flex-1 text-sm text-gray-500 dark:text-gray-400">{{ $item['description'] ?? '' }}</p>
                         <p class="mt-2 text-xs text-gray-400">{{ $item['version'] ?? '' }} · {{ $item['author'] ?? '' }}</p>
-                        <div class="mt-4">
-                            <x-filament::button size="sm" color="primary" wire:click="installFromMarket({{ $index }})">安装</x-filament::button>
+                        <div class="mt-4 flex flex-wrap gap-2">
+                            @if($marketPaid && ! $this->isMarketPurchased($index))
+                                <x-filament::button size="sm" color="primary" wire:click="purchaseMarketItem({{ $index }})">购买</x-filament::button>
+                            @elseif($marketPaid)
+                                <x-filament::badge color="success">已购买</x-filament::badge>
+                            @endif
+                            <x-filament::button size="sm" color="gray" wire:click="installFromMarket({{ $index }})">安装</x-filament::button>
                         </div>
                     </div>
                 </x-filament::section>
             @empty
-                <p class="text-sm text-gray-500">点击「刷新市场」拉取可用插件/主题</p>
+                <p class="text-sm text-gray-500">点击「刷新市场」拉取可用插件</p>
             @endforelse
         </div>
     </x-filament::section>
diff --git a/resources/views/filament/pages/themes.blade.php b/resources/views/filament/pages/themes.blade.php
index 4456323..9453492 100644
--- a/resources/views/filament/pages/themes.blade.php
+++ b/resources/views/filament/pages/themes.blade.php
@@ -64,4 +64,40 @@
             <x-filament::button type="submit" color="primary">安装</x-filament::button>
         </form>
     </x-filament::section>
+
+    <x-filament::section heading="主题市场" :description="config('market.url') ?: '未配置远程市场（config/market.php 的 MARKET_URL），仅支持本地 ZIP 安装'">
+        <div class="mb-4">
+            <x-filament::button color="gray" wire:click="loadThemeMarket">刷新市场</x-filament::button>
+        </div>
+        <div style="display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem">
+            @forelse($marketItems as $index => $item)
+                @php $marketPaid = $item['price'] > 0; @endphp
+                <x-filament::section :compact="true">
+                    <div class="flex flex-col">
+                        <div class="flex items-start justify-between gap-3">
+                            <x-filament::icon icon="heroicon-o-swatch" class="h-8 w-8 text-primary-600" />
+                            @if($marketPaid)
+                                <x-filament::badge color="warning">¥{{ number_format($item['price'] / 100, 2) }}</x-filament::badge>
+                            @else
+                                <x-filament::badge color="success">免费</x-filament::badge>
+                            @endif
+                        </div>
+                        <h3 class="mt-3 text-base font-semibold">{{ $item['title'] ?? $item['name'] }}</h3>
+                        <p class="mt-1 flex-1 text-sm text-gray-500 dark:text-gray-400">{{ $item['description'] ?? '' }}</p>
+                        <p class="mt-2 text-xs text-gray-400">{{ $item['version'] ?? '' }} · {{ $item['author'] ?? '' }}</p>
+                        <div class="mt-4 flex flex-wrap gap-2">
+                            @if($marketPaid && ! $this->isThemeMarketPurchased($index))
+                                <x-filament::button size="sm" color="primary" wire:click="purchaseThemeMarketItem({{ $index }})">购买</x-filament::button>
+                            @elseif($marketPaid)
+                                <x-filament::badge color="success">已购买</x-filament::badge>
+                            @endif
+                            <x-filament::button size="sm" color="gray" wire:click="installFromThemeMarket({{ $index }})">安装</x-filament::button>
+                        </div>
+                    </div>
+                </x-filament::section>
+            @empty
+                <p class="text-sm text-gray-500">点击「刷新市场」拉取可用主题</p>
+            @endforelse
+        </div>
+    </x-filament::section>
 </x-filament-panels::page>
diff --git a/tests/Feature/MarketPurchaseTest.php b/tests/Feature/MarketPurchaseTest.php
new file mode 100644
index 0000000..2859464
--- /dev/null
+++ b/tests/Feature/MarketPurchaseTest.php
@@ -0,0 +1,125 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Feature;
+
+use App\Blog\Services\MarketPurchaseService;
+use App\Models\MarketPackage;
+use App\Models\Setting;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Plugins\Neatstudio\Payment\Models\Payment;
+use RuntimeException;
+use Tests\TestCase;
+
+class MarketPurchaseTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private User $user;
+
+    private array $item = [
+        'name' => 'vendor.demo',
+        'type' => 'plugin',
+        'title' => '演示付费插件',
+        'description' => '演示',
+        'version' => '1.0.0',
+        'price' => 9900,
+        'download_url' => 'https://example.com/vendor.demo.zip',
+    ];
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->seed();
+        Setting::set('pay_sandbox', '1');
+
+        $this->user = User::create([
+            'name' => '买家',
+            'email' => 'buyer@test.com',
+            'password' => bcrypt('password'),
+        ]);
+    }
+
+    private function service(): MarketPurchaseService
+    {
+        return app(MarketPurchaseService::class);
+    }
+
+    public function test_purchase_creates_order_with_payable_package(): void
+    {
+        $this->actingAs($this->user);
+
+        $payment = $this->service()->purchase($this->item);
+
+        $this->assertNotNull($payment);
+        $this->assertInstanceOf(MarketPackage::class, $payment->payable);
+        $this->assertSame('pending', $payment->payable->status);
+        $this->assertSame(9900, $payment->amount);
+        $this->assertSame('市场商品：演示付费插件', $payment->payable_label);
+    }
+
+    public function test_sandbox_payment_marks_package_paid(): void
+    {
+        $this->actingAs($this->user);
+
+        $payment = $this->service()->purchase($this->item);
+        $this->actingAs($this->user)->post('/pay/sandbox/'.$payment->order_no.'/confirm');
+
+        $package = MarketPackage::query()->first();
+        $this->assertTrue($package->isPaid());
+        $this->assertSame($payment->id, $package->payment_id);
+        $this->assertTrue($this->service()->isPurchased('vendor.demo', 'plugin'));
+    }
+
+    public function test_purchase_returns_null_when_already_paid(): void
+    {
+        $this->actingAs($this->user);
+
+        $this->service()->purchase($this->item);
+        $package = MarketPackage::query()->first();
+        $package->markPaid($package->payment ?? Payment::first() ?? Payment::create([
+            'order_no' => 'X'.uniqid(),
+            'user_id' => $this->user->id,
+            'subject' => '占位',
+            'amount' => 0,
+            'status' => 'paid',
+            'paid_at' => now(),
+        ]));
+
+        $this->assertNull($this->service()->purchase($this->item));
+    }
+
+    public function test_assert_can_install_blocks_unpaid_paid_item(): void
+    {
+        $this->actingAs($this->user);
+
+        $this->expectException(RuntimeException::class);
+        $this->service()->assertCanInstall($this->item);
+    }
+
+    public function test_free_item_needs_no_purchase(): void
+    {
+        $this->actingAs($this->user);
+
+        $free = ['name' => 'vendor.free', 'type' => 'plugin', 'title' => '免费插件', 'price' => 0];
+
+        $this->assertFalse($this->service()->requiresPayment($free));
+        $this->service()->assertCanInstall($free); // 不抛异常
+
+        $this->assertTrue(true);
+    }
+
+    public function test_purchase_requires_payment_plugin(): void
+    {
+        $this->actingAs($this->user);
+
+        app(\App\Blog\Support\PluginManager::class)->disable('neatstudio.membership');
+        app(\App\Blog\Support\PluginManager::class)->disable('neatstudio.payment');
+
+        $this->expectException(RuntimeException::class);
+        $this->service()->purchase($this->item);
+    }
+}