vonpay-checkout
Python SDK for the Von Payments Checkout API. Create hosted checkout sessions, verify webhook signatures, and validate signed return redirects.
Install
pip install vonpay-checkout
Requires: Python 3.9+, httpx 0.27+
Quick start
from vonpay.checkout import VonPayCheckout, VonPayError
client = VonPayCheckout("vp_sk_test_...")
session = client.sessions.create(
amount=1499,
currency="USD",
country="US",
success_url="https://example.com/order/123/confirm",
)
print(session.checkout_url)
# https://checkout.vonpay.com/checkout?session=vp_cs_test_...
Discrete-lifecycle API
The payment_intents, refunds, tokens, and capabilities namespaces give server-side control over payment intents, alongside the existing hosted-checkout sessions flow.
# Create a payment intent (auth + capture)
intent = client.payment_intents.create(
amount=1499,
currency="usd",
capture_method="automatic",
metadata={"order_id": "ord_42"},
idempotency_key="ord_42-charge-1",
)
print(intent.id, intent.status) # "vpi_live_…", "succeeded"
# Auth-only + later capture (fulfillment-on-ship)
auth = client.payment_intents.create(amount=1499, currency="usd", capture_method="manual")
client.payment_intents.capture(auth.id, amount_to_capture=1499)
# Refund a captured intent (partial or full)
refund = client.refunds.create(payment_intent=intent.id, amount=500)
# Create a reusable token for save-card / MIT flows
token = client.tokens.create(buyer_id="buyer_42", setup_for_future_use="off_session")
# Read the merchant's processor capability matrix before invoking optional ops
caps = client.capabilities.get()
if caps.supported_operations.partial_refund:
# partial refunds supported — safe to offer partial-refund UI
...
Features
- Typed session / webhook / error objects — full
CheckoutSession,SessionStatus,WebhookEvent,VonPayErrortypes. - Webhook verification —
webhooks.construct_event(raw_body, signature_header, signing_secret)parses thex-vonpay-signature: t=<unix>,v1=<hex>header, verifies HMAC-SHA256 overf"{t}.{raw_body}"keyed by your per-endpoint signing secret (whsec_…), and enforces the freshness window (≤5 min old / ≤30 sec future). Accepts multiplev1=entries for zero-downtime secret rotation. - Return confirmation —
client.sessions.confirm_return(params, session_secret)verifies the signature and confirms server-side that the payment succeeded, returningReturnOutcome(paid, signature_valid, status, reason). Use this, and branch onpaid. ⚠️verify_return_signature()is the low-level primitive: it proves the message is AUTHENTIC, and a declined payment is signed just as validly, so atruefrom it is not proof of payment. ⚠️reason == "still_pending"means the charge is in flight (the ordinary 3-D Secure case) — show a neutral "confirming your payment", never a failure. ⚠️paid: truestill does not mean safe to fulfil: record which session IDs you have already fulfilled, and prefer fulfilling from thecharge.succeededwebhook. ⚠️ Notsession.succeeded— that event is emitted internally but is not subscribable: it is absent from the merchant subscription catalog, which accepts an unknown event key, stores nothing and returns success. An endpoint subscribed to it receives nothing, forever, with no error raised at any layer.charge.succeededis the fulfilment event. - Auto-retry — exponential backoff on 429 / 5xx with
Retry-Afterheader support. - Request ID tracing — every response includes
X-Request-Idfor support tickets.
Documentation
License
MIT
1 maintainer
Metadata
1 maintainer
Release files for vonpay-checkout 2.1.0
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| File | Size | Uploaded | |
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|---|---|---|---|---|
| vonpay_checkout-2.1.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 168.4 kB
Release files / vonpay_checkout-2.1.0.tar.gz
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