Initial Commit

app/services/stripe_service.py

@@ -0,0 +1,61 @@
+import asyncio
+import stripe
+
+from app.config import get_settings
+from app.exceptions import PaymentError
+
+_stripe_initialized = False
+
+
+def _init_stripe():
+    global _stripe_initialized
+    if not _stripe_initialized:
+        stripe.api_key = get_settings().STRIPE_SECRET_KEY
+        _stripe_initialized = True
+
+
+async def create_payment_intent(
+    amount: float,
+    metadata: dict,
+    description: str = "",
+) -> stripe.PaymentIntent:
+    _init_stripe()
+    settings = get_settings()
+    try:
+        intent = await asyncio.to_thread(
+            stripe.PaymentIntent.create,
+            amount=int(round(amount * 100)),
+            currency=settings.STRIPE_CURRENCY,
+            metadata=metadata,
+            description=description,
+            automatic_payment_methods={"enabled": True},
+        )
+        return intent
+    except stripe.StripeError as e:
+        raise PaymentError(str(e))
+
+
+async def create_refund(
+    payment_intent_id: str,
+    amount: float | None = None,
+    reason: str | None = None,
+) -> stripe.Refund:
+    _init_stripe()
+    try:
+        kwargs: dict = {"payment_intent": payment_intent_id}
+        if amount is not None:
+            kwargs["amount"] = int(round(amount * 100))
+        if reason:
+            kwargs["reason"] = reason
+        return await asyncio.to_thread(stripe.Refund.create, **kwargs)
+    except stripe.StripeError as e:
+        raise PaymentError(str(e))
+
+
+def verify_webhook(payload: bytes, sig_header: str) -> stripe.Event:
+    _init_stripe()
+    settings = get_settings()
+    try:
+        return stripe.Webhook.construct_event(payload, sig_header, settings.STRIPE_WEBHOOK_SECRET)
+    except stripe.SignatureVerificationError:
+        raise PaymentError("Invalid webhook signature")