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Wallet SDK

Define your checks

Checks.kt
package samples


import com.wallet.model.DocTypes
import com.wallet.model.PresentationRequest
import com.wallet.model.PresetAnswer
import com.wallet.model.RequestPreset


/** The checks an operator can pick. A preset is a title, the document, the fields, and how to show the answer. */
object Checks {
    private const val EID = "org.iso.23220.1"
    private const val EID_PHOTO_ID = "org.iso.23220.photoid.1"


    val AGE_18 = RequestPreset(
        id = "eid-age-over-18",
        section = "Emirates ID",                       // group in the picker
        title = "Age check",
        subtitle = "Photo and over 18",
        request = PresentationRequest(
            docType = DocTypes.PHOTO_ID,
            namespaces = mapOf(EID to setOf("portrait", "age_over_18", "issuing_authority")),
        ),
        answer = PresetAnswer.YesNo("age_over_18", "Over 18"),   // one big Yes / No
        symbol = "18+",
    )


    val IDENTITY = RequestPreset(
        id = "eid-identity",
        section = "Emirates ID",
        title = "Identity check",
        subtitle = "Photo, name, ID number, validity",
        request = PresentationRequest(
            docType = DocTypes.PHOTO_ID,
            namespaces = mapOf(
                EID to setOf("portrait", "given_name", "family_name", "birth_date", "expiry_date", "issuing_authority"),
                EID_PHOTO_ID to setOf("person_id"),
            ),
        ),
        answer = PresetAnswer.Details,                 // photo, name and every field returned
        symbol = "ID",
    )


    val emiratesId = listOf(AGE_18, IDENTITY)
}

Pass presets to the screen in the order you want them; they are grouped by section (RequestPresets.mdl + Checks.emiratesId, as in the Quickstart).

How the answer is shown

Section titled “How the answer is shown”
answer The result screen shows
PresetAnswer.Details the photo, the name and every field returned
PresetAnswer.YesNo(element, label) one large Yes / No from a boolean field (age_over_21)
PresetAnswer.ValidUntil(element, label) one large Valid / Expired from a date field (a medical, a permit)

Ask for the minimum

Section titled “Ask for the minimum”

The wallet shows the list to the holder, and a short list is approved more often.

You need to know Ask for
Is this person over 21? portrait, age_over_21
Who is this person? portrait, given_name, family_name, birth_date, and the ID number
Is the licence valid? portrait, document_number, expiry_date, driving_privileges

issuing_authority is not personal data and lets the result say who issued the document.

Ready-made presets

Section titled “Ready-made presets”
Document Presets
Driving licence RequestPresets.MDL_AGE_OVER_18, RequestPresets.MDL_DRIVER_CHECK (built in)
Emirates ID age 18+ and identity (the sample above; the demo’s brand pack has the same)
Competition licence valid medical, licence check (in the demo’s brand pack)

Field names per document are in Credentials.

Next: Read the result.