Similar to the MD5 hashing feature returned by the gateway response, the x_fp_hash is build by creating a MD5 hash with the following fields:
|x_fp_timestamp||This is the timestamp (unix UTC) of the request. This . Must be in UTC timezone. This will be the same timestamp value that was included in the x_fp_hash.|
|x_fp_sequence||Custom sequence value designated by the merchant. Also used in the creation and validation of the x_fp_hash.|
(optional) Custom expiration time defined by the merchant, in minutes. If x_fp_expiry is given, the value must also be included in the string portion of the x_fp_hash generation.
Passing Customer Contact Information