def webhook():
logger.debug('Received HTTP request')
if request.method == 'POST':
logger.debug('HTTP request is type POST')
# event payload
request_data = request.data.decode('utf-8')
# webhook signature
request_sig = request.headers.get('X-CC-Webhook-Signature', None)
logger.debug('Validating webhook event signature')
# signature verification and event object construction
try:
event = Webhook.construct_event(request_data, request_sig, config.webhook_secret)
except (WebhookInvalidPayload, SignatureVerificationError) as e:
return str(e), 400
logger.info("Received event: id={id}, code={code}, type={type}".format(id=event.id, code=event.data.code, type=event.type))
# check event.type. We should only receive charge:confirmed. If webhook is misconfigured we want to ignore pending or failed charges.
if event.type != "charge:confirmed":
logger.debug('Event is not a confirmed charge. Waiting...')
return 'Event received', 200
logger.debug('Processing confirmed charge')
# Add all payments and divide by tickets price to get number of tickets purchased
# event.data.payments is a list, usually contains one payment, but might have more than one.
try:
logger.debug('Calculating payment total')
payment_total = 0
# add all payments in list
for payment in event.data.payments:
payment_total += float(payment.value.local.amount)
logger.debug('Calculating number of tickets')
# Payment should be exact multiple of ticket_price
num_tickets = int(payment_total // config.ticket_price)
# A confirmed charge should have payment_total > 0
assert(payment_total > 0)
# num_tickets should be > 0, if ticket_price is set correctly
assert(num_tickets > 0)
except Exception as e:
logger.error(str(e))
return 'Error processing event: '+str(e), 400
logger.debug("Payment total: " + str(payment_total))
logger.debug("Number of tickets: " + str(num_tickets))
logger.debug('Creating EventBrite discount code '+str(event.data.code))
# Create a dicsount code, based on the Coinbase charge code
# Set quantity to num_tickets and discount to 100%
eventbrite = Eventbrite(config.eventbrite_token)
result = eventbrite.post_event_discount(
config.event_id,
discount_code=event.data.code,
discount_percent_off=100,
discount_quantity_available=num_tickets
)
# Check result from EventBrite API
if 'status_code' in result and result.status_code == 400:
logger.error("Error creating EventBrite discount code: "+str(result))
return "Error creating EventBrite discount code", 400
else:
logger.info("EventBrite success: "+str(result))
return 'Success', 200
