4️⃣ Scan Document

To scan the NFC you need to provide the Basic Access Control - BAC - key. The BAC key is computed from the Machine Readable Zone - MRZ and acts as "proof of authorization" to access the chip content. The scanDocument API will compute the bac key from the MRZ and return an EDocument if the entire flow is successful.

Api Signature

Android

fun scanDocument(onCompletion: (DocumentResult<EDocument>) -> Unit)

iOS

Flutter

Returned result

If the Keyless Document SDK can read the NFC tag it will return an instance of EDocument containing the data read.

Android

public data class EDocument(
	// The path to the image extracted from the document
    var facePath: String = UNKNOWN,
    // Personal information of the document holder
    var personalInformation: PersonalInformation = PersonalInformation(),
    // Information about the document itself    
    var documentInformation: DocumentInformation = DocumentInformation(),
    // Security-related information and verification status
    var security: DocumentSecurity = DocumentSecurity(),
)

iOS

Flutter

Errors

In case of errors the Keyless Document SDK will return the following errors:

Android

public sealed class DocumentError(
    public open val code: Int,
    public open val message: String,
) 

// errors launching the MrzCameraActivity
public data class InternalError(override val code: Int) : DocumentError(code, "Internal error")

public data object UserCancelled : DocumentError(
	code = 5000,
    message = "User cancelled the operation."
)

public data object LauncherNotInitialized : DocumentError(
    code = 5002,
    message = "Launcher is null or not initialized"
)

public data class ChipAuthError(val  errorMessage: String?  = null) : DocumentError(
    code = 7002,
    message =  errorMessage ?: "BAC Authentication failed"
)

public data class ChipException(val e: Throwable?) : DocumentError(
    code = 7003,
    message =  e?.message ?: "Chip exception"
)

public data class ChipLost(val permissionDenial: Boolean = false) : DocumentError(
    code = 7004,
    message = "Chip lost"
)

public data class UnknownError( override val message: String) : DocumentError(
    code = 9999,
    message = message
)

iOS

Flutter

Example usage

Android

KeylessDocument.scanDocument() {
    when (it) {
        is DocumentResult.Success -> {
            Log.d(TAG, "EDocument ${it.value}")
 		}
    	is DocumentResult.Failure -> {
            Log.d(TAG, "Error ${it.error}")
        }
}

iOS

Flutter