v2 order endpoint

CAPTURE intent

Explicit currency_code

v2 capture endpoint

OAuth token acquisition

IPN cmd parameter

IPN VERIFIED check

IPN URL

All payment statuses handled

Duplicate transaction guard

Custom exception class

Billing plans endpoint

tenure_type field

sequence field

total_cycles zero

auto_bill_outstanding

setup_fee_failure_action

payment_failure_threshold

Subscriptions endpoint

application_context URLs

Approval URL extraction

Pricing currency_code

OAuth authentication

Refund endpoint

Partial refund amount

Full refund omits amount

note_to_payer field

Custom PayPalError class

RequestException handling

Environment-configurable URL

Refund currency_code

Transaction logging

OAuth token used

get_refund_details function

SDK script URL

client-id param present

currency param present

Button container div

paypal.Buttons call

createOrder uses actions.order.create

amount value present

onApprove calls capture

Backend notification after capture

render('#paypal-button-container')

OAuth token endpoint

Sandbox URL

Production URL

get_order_details endpoint

Authorization header

Approval URL extraction

Custom PayPalError class

RequestException caught separately

Mode-configurable client

Order status from response

txn_type extraction

parent_txn_id in refund handler

reason_code in chargeback handler

mc_gross in refund handler

IPN verification cmd param

IPN VERIFIED response check

All three payment statuses

Duplicate check before processing

payer_email extraction

item_name extraction