Content type of the request. Right now Payment System ONLY SUPPORTS 'multipart/form-data'. USAGE OF 'boundary' VARIABLE IS MANDATORY.

The forwarded IP Address header field consists of the corresponding HTTP request IP Address field between PSU and TPP. If not available, the TPP shall use the IP Address used by the TPP when submitting this request. Allowed length between 1-39 characters. Allowed characters 'A-Fa-f0-9.:*'

URI of the TPP, where the transaction flow shall be redirected to after a Redirect. Mandated for the Redirect SCA Approach (including OAuth2 SCA approach). Allowed length between 10-200 characters. Allowed characters: 'a-zA-Z0-9:/.-&_?=%'

The digest is a base64 encoded hash of the body (SHA-512 or SHA-256 is allowed). Allowed length between 20-200 characters. Must start with 'SHA=' or 'sha=', allowed characters 'a-zA-Z0-9+/='

Signature is made up of the headers - date, digest, x-request-id and tpp-redirect-uri (tpp-redirect-uri only in POST request). Allowed length between 50-4096 characters. Allowed characters 'a-zA-Z0-9=",-/+' For more information see additional documentation in portal.

Public certificate of the Initiating Party that corresponds with the signature made by the Initiating Party. Allowed length between 10-4096 characters. Allowed characters 'a-zA-Z0-9=+/'

Standard https header element with date, time and timezone.