Harden credit flows and add RevenueCat webhook

tests/Unit/ProcessRevenueCatWebhookTest.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\Jobs\ProcessRevenueCatWebhook;
+use App\Models\Tenant;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Carbon;
+use Tests\TestCase;
+
+class ProcessRevenueCatWebhookTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_job_creates_purchase_and_updates_balance(): void
+    {
+        config()->set('services.revenuecat.product_mappings', 'pro_month:5');
+        $tenant = Tenant::factory()->create([
+            'event_credits_balance' => 1,
+            'subscription_tier' => 'free',
+        ]);
+
+        $expiresAt = Carbon::now()->addDays(30)->setTimezone('UTC')->floorSecond();
+        $payload = [
+            'event' => [
+                'app_user_id' => 'tenant:' . $tenant->id,
+                'product_id' => 'pro_month',
+                'transaction_id' => 'txn-test-1',
+                'price' => 19.99,
+                'currency' => 'eur',
+                'expiration_at_ms' => (int) ($expiresAt->valueOf()),
+            ],
+        ];
+
+        $job = new ProcessRevenueCatWebhook($payload, 'evt-test-1');
+        $job->handle();
+
+        $tenant->refresh();
+        $this->assertSame(6, $tenant->event_credits_balance);
+        $this->assertSame('pro', $tenant->subscription_tier);
+        $this->assertNotNull($tenant->subscription_expires_at);
+        $this->assertSame($expiresAt->timestamp, $tenant->subscription_expires_at->timestamp);
+
+        $this->assertDatabaseHas('event_purchases', [
+            'tenant_id' => $tenant->id,
+            'provider' => 'revenuecat',
+            'external_receipt_id' => 'txn-test-1',
+            'events_purchased' => 5,
+        ]);
+
+        $this->assertDatabaseHas('event_credits_ledger', [
+            'tenant_id' => $tenant->id,
+            'delta' => 5,
+            'reason' => 'purchase',
+        ]);
+
+        $duplicateJob = new ProcessRevenueCatWebhook($payload, 'evt-test-1');
+        $duplicateJob->handle();
+
+        $this->assertSame(6, $tenant->fresh()->event_credits_balance);
+    }
+}