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kuti-pe

SDK oficial de KUTI para Python. Crea sesiones de checkout, consulta el estado de un pago y verifica webhooks — sin reimplementar auth, manejo de errores ni firma HMAC a mano.

Solo servidor. Este paquete usa tu secret key (kuti_live_... / kuti_test_...). Nunca lo importes en código que se sirva al navegador.

Instalación

pip install kuti-pe

Quickstart

import os
from kuti import KutiClient

kuti = KutiClient(os.environ["KUTI_SECRET_KEY"])

# El monto SIEMPRE se resuelve en tu backend — nunca confíes en un monto
# que te mande el navegador del comprador.
session = kuti.checkout_sessions.create(
    amount={"amount": "249.90", "currency": "PEN"},
    payment_method_types=["INTEROPERABLE_QR", "BANK_TRANSFER"],
    description="Zapatillas running talla 42",
    customer={"id": "cus_01ABC"},  # existente — si viene id, se ignora el resto
    # customer={"name": "María López", "email": "maria@example.com"},
    idempotency_key=f"order-{order_id}",  # evita duplicar el cobro si reintentas
)

# Envía session.checkout_url al frontend y ábrelo con Checkout.js:
#   window.Kuti.open({ checkoutUrl: session.checkout_url, onSuccess, onFailure })

Confirmar un pago (sin necesitar webhooks)

onSuccess de Checkout.js corre en el navegador del comprador — no es confiable por sí solo. Vuelve a preguntarle a la API:

intent = kuti.payment_intents.retrieve(payment_intent_id)
if intent.status == "SUCCEEDED":
    # entrega el producto / activa el servicio
    pass

Verificar un webhook

from flask import Flask, request
from kuti import verify_webhook_signature, KutiSignatureVerificationError
import os

app = Flask(__name__)

@app.post("/webhooks/kuti")
def kuti_webhook():
    payload = request.get_data(as_text=True)  # body CRUDO, sin json.loads antes
    try:
        verify_webhook_signature(
            payload,
            request.headers["X-Kuti-Signature"],
            request.headers["X-Kuti-Timestamp"],
            os.environ["KUTI_WEBHOOK_SECRET"],
        )
    except KutiSignatureVerificationError:
        return "Invalid signature", 400

    event = request.get_json(force=True)
    # payment.succeeded, checkout.session.completed, …
    return "", 200

Manejo de errores

Todas las excepciones de la API extienden KutiApiError (status, code, request_id, doc_url, details):

from kuti import KutiValidationError, KutiNotFoundError, KutiApiError

try:
    kuti.checkout_sessions.create(...)
except KutiValidationError as err:
    print(err.details)  # [ErrorDetail(field="amount.amount", ...)]
except KutiNotFoundError:
    pass
except KutiApiError as err:
    print(err.code, err.request_id)  # úsalo al reportar un bug a soporte

Los GET y los POST con idempotency_key se reintentan automáticamente en errores de red o 429/503. Un POST sin idempotency_key nunca se reintenta, para no duplicar un cobro.

API

  • KutiClient(secret_key, base_url=None)
  • kuti.checkout_sessions.create(*, amount, payment_method_types, …, idempotency_key=None)
  • kuti.payment_intents.retrieve(id)
  • verify_webhook_signature(payload, signature_header, timestamp_header, secret, tolerance_seconds=300)

Requisitos

Python 3.9+ · sin dependencias de runtime.

Release files for kuti-pe 1.0.1

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