Proximity Presentation mDocs Holder SDK Cheatsheet

This guide provides a quick overview of how to use the MATTR mDocs Holder SDKs to present a claimed mDoc for verification in-person via a proximity presentation workflow as per ISO/IEC 18013-5:2021.

Use these guides as a quick reference to get started. For detailed information, explore the linked tutorials and reference documentation tailored for each platform.

Core usage

Initialize the SDK

    try mobileCredentialHolder.initialize()

Initialize the SDK

mobileCredentialHolder.initialize(context)

Initialize the SDK

const initialiseResult = await mobileCredentialHolder.initialise()
if (initialiseResult.isErr()) {
    const { error } = initialiseResult
    // handle error scenarios
    return
}

Create a proximity presentation session

    let proximityPresentationSession = try await mobileCredentialHolder.createProximityPresentationSession(
                    onRequestReceived: onRequestReceived(_:error:)
                    // 1. Callback triggered when the verifier requests a credential for verification. Use this callback to display the request on the UI and get the user's consent to share any matched credentials.
                )

The createProximityPresentationSession method returns an instance of ProximityPresentationSession which contains a deviceEngagement property that must be shared with the verifier embedded in a QR code to establish a secure connection.

Create a proximity presentation session

val proximityPresentationSession = mobileCredentialHolder.createProximityPresentationSession(
    onRequestReceived = { session, matchedCredentials, error ->
        if (error != null) {
             // Handle error
        } else {
            // 1. Show request on UI
            // 2. Show matched credentials on UI and get user's consent to share them
            // 3:
            session.sendResponse(
                val credentialIds = matchedCredentials!!.flatMap {
                    it.matchedCredentials.map { credential -> credential.id }
                } ,
                activity = activity
            )
        }
    }
)

Create a proximity presentation session

const createSessionResult = await mobileCredentialHolder.createProximityPresentationSession({
    onRequestReceived: (data) => {
        if ('error' in data) {
            // handle error scenarios
            return
        }

        // 1. Show UI prompt and gather user consent
        // 2. Retrieve matching credential from request object
    }
})
if (createSessionResult.isErr()) {
    const { error } = createSessionResult
    // handle error scenarios
    return
}
const proximityPresentationSession = createSessionResult.value

Present matching credentials to holder

Present matching credentials to the holder

    let credential = try await mobileCredentialHolder.getCredential(credentialId: id)

id : Pass the identifier of the credential you want to present, as a string. This information is returned by the createProximityPresentationSession method on a onRequestReceived event, triggered when the verifier requests a credential for verification.

Your application must then gather the user's consent to share the matching credential with the verifier.

Present matching credentials to the holder

    val credential = mobileCredentialHolder.getCredential(credentialId)

credentialId : Pass the identifier of the credential you want to present, as a string. This information is returned by the createProximityPresentationSession method on a onRequestReceived event, triggered when the verifier requests a credential for verification.

Your application must then gather the user's consent to share the matching credential with the verifier.

Present matching credentials to the holder

const credentialResult = await mobileCredentialHolder.getCredential(credentialId) 
if (credentialResult.isErr()) {
    const { error } = credentialResult
    // handle error scenarios
    return
}
const credential = credentialResult.value

//
// Send a response to the verifier
//
const sendResponseResult = await mobileCredentialHolder.sendProximityPresentationResponse({
    credentialIds: [credentialId],
    terminateSession: false
})
if (sendResponseResult.isErr()) {
    const { error } = sendResponseResult
    // handle error scenarios
    return
}

credentialId : Pass the identifier of the credential you want to present, as a string. This information is returned by the createProximityPresentationSession method on a onRequestReceived event, triggered when the verifier requests a credential for verification.

Your application must then gather the user's consent to share the matching credential with the verifier.

Send a response to the verifier

Send response to the verifier

    try await proximityPresentationSession.sendResponse(credentialIds: [id])

id : Pass the identifier of the credential you want to send, as a string.

Send response to the verifier

    proximityPresentationSession?.sendResponse(credentialIds = listOf(credentialId))

credentialId : Pass the identifier of the credential you want to send, as a string.

Send response to the verifier

const sendResponseResult = await mobileCredentialHolder.sendProximityPresentationResponse({
    credentialIds: [credentialId]
})
if (sendResponseResult.isErr()) {
    const { error } = sendResponseResult
    // handle error scenarios
    return
}

credentialId : Pass the identifier of the credential you want to send, as a string.

Proximity Presentation mDocs Holder SDK Cheatsheet

Core usage

Initialize the SDK

Create a proximity presentation session

Present matching credentials to holder

Send a response to the verifier

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