three_ds_authentication.challenge

The three_ds_authentication.challenge event. Upon receiving this request, the Card Program should issue its own challenge to the cardholder. After a cardholder challenge is successfully completed, the Card Program needs to respond back to Lithic by call to /v1/three_ds_decisioning/challenge_response. Then the cardholder must navigate back to the merchant checkout flow to complete the transaction. Some merchants will include an app_requestor_url for app-based purchases; Lithic recommends triggering a redirect to that URL after the cardholder completes an app-based challenge.