Add finance app with Stripe Checkout subscriptions (#21)

Introduce Invoice/Payment ledger models, $10/mo settings-backed pricing, hosted Checkout + signed webhooks, Django admin, and authenticated list APIs.
2026-07-26 19:16:34 -05:00
parent 9984d1c340
commit f92bd268b3
23 changed files with 1540 additions and 0 deletions
@@ -0,0 +1,51 @@
+from rest_framework import serializers
+
+from finance.models import Invoice, Payment
+
+
+class InvoiceSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Invoice
+        fields = [
+            "id",
+            "provider",
+            "status",
+            "currency",
+            "amount_due",
+            "amount_paid",
+            "period_start",
+            "period_end",
+            "stripe_invoice_id",
+            "stripe_checkout_session_id",
+            "stripe_subscription_id",
+            "hosted_invoice_url",
+            "description",
+            "created",
+            "last_modified",
+        ]
+        read_only_fields = fields
+
+
+class PaymentSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Payment
+        fields = [
+            "id",
+            "invoice",
+            "provider",
+            "status",
+            "currency",
+            "amount",
+            "stripe_payment_intent_id",
+            "stripe_charge_id",
+            "paid_at",
+            "failure_message",
+            "created",
+            "last_modified",
+        ]
+        read_only_fields = fields
+
+
+class CheckoutSessionSerializer(serializers.Serializer):
+    success_url = serializers.URLField(required=False, allow_blank=False)
+    cancel_url = serializers.URLField(required=False, allow_blank=False)