It is contained in addition to the data element 'chosenScaMethod' if challenge data is needed for SCA. In rare cases this attribute is also used in the context of the 'startAuthorisationWithPsuAuthentication' link.
| name | data type | description |
|---|---|---|
| image | string | PNG data (max. 512 kilobyte) to be displayed to the PSU, Base64 encoding, cp. [RFC4648]. This attribute is used only, when PHOTO_OTP or CHIP_OTP is the selected SCA method. |
| data | array of string | A collection of strings as challenge data. |
| imageLink | string | A link where the ASPSP will provides the challenge image for the TPP. |
| otpMaxLength | number | The maximal length for the OTP to be typed in by the PSU. |
| otpFormat | string | The format type of the OTP to be typed in. The admitted values are \"characters\" or \"integer\". |
| additionalInformation | string | Additional explanation for the PSU to explain e.g. fallback mechanism for the chosen SCA method. The TPP is obliged to show this to the PSU. |
Example
{
"image" : "...",
"data" : [ "...", "..." ],
"imageLink" : "...",
"otpMaxLength" : 12345,
"otpFormat" : "...",
"additionalInformation" : "..."
}