feat(wallet): implement wallet transaction model, views, and serializers for fund management ✨

billing/migrations/0014_wallettransaction.py

@@ -0,0 +1,55 @@
+# Generated by Django 5.2 on 2025-07-25 08:34
+
+import django.db.models.deletion
+import django.utils.timezone
+import uuid
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("billing", "0013_payment_expiry_notification_sent"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="WalletTransaction",
+            fields=[
+                (
+                    "id",
+                    models.UUIDField(
+                        default=uuid.uuid4,
+                        editable=False,
+                        primary_key=True,
+                        serialize=False,
+                    ),
+                ),
+                ("amount", models.FloatField()),
+                (
+                    "transaction_type",
+                    models.CharField(
+                        choices=[("TOPUP", "Topup"), ("DEBIT", "Debit")], max_length=10
+                    ),
+                ),
+                ("description", models.TextField(blank=True, null=True)),
+                (
+                    "reference_id",
+                    models.CharField(blank=True, max_length=255, null=True),
+                ),
+                ("created_at", models.DateTimeField(default=django.utils.timezone.now)),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="wallet_transactions",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "ordering": ["-created_at"],
+            },
+        ),
+    ]