Enroll a new loyalty member and record a purchase check-in via the PAR Punchh POS API to award loyalty points at the point of sale

Steps

1. Obtain POS API credentials from the PAR Punchh developer portal at developers.partech.com and review the Getting Started with POS API Integrations guide
2. At the time of purchase, prompt the guest for their phone number or loyalty identifier; call the Punchh API to look up the account or enroll a new member if no account exists
3. Create a check-in for the identified loyalty user by POSTing to the Punchh check-in endpoint, including the purchase details such as total amount, location identifier, and POS transaction reference
4. Parse the check-in response to retrieve the points awarded and any triggered offers or rewards, then display the updated balance or reward status to the guest on the POS terminal
5. If the guest has an available redemption offer, present it before finalizing the check and call the Punchh redemption endpoint to apply the discount, then pass the discount amount back to the POS tender screen
6. Void check-ins and redemptions when a transaction is voided or refunded by calling the corresponding Punchh reversal endpoints to keep the loyalty ledger accurate