| Name | Type | Description | Notes |
|---|---|---|---|
| payer_authentication_request | str | Message sent from merchant server to authenticate the cardholder. | [optional] |
| term_url | str | Terminal URL for processing request. | [optional] |
| merchant_data | str | Formatted string encoding transaction time, order ID, and return URL data. | [optional] |
| acs_url | str | The URL for the authentication redirect for the merchant. | [optional] |
| c_req | str | The CReq message initiates cardholder interaction in a 3DS 2.x challenge flow and carries authentication data from the cardholder. | [optional] |
| session_data | str | Customer web browser session data. | [optional] |