Starting a transaction

Every verification runs as a transaction. When you start it you declare the document type and the steps to run (controls); Prove ID returns a transaction ID and the gesture to use in the liveness step.

Gson gson = new Gson();
JsonObject optionalData = new JsonObject();
optionalData.add("idType", gson.toJsonTree("IDCARD"));
optionalData.add("controls", gson.toJsonTree(Arrays.asList("FRONT", "BACK", "HOLOGRAM", "LIVENESS")));

ServerCall.startTransaction(new TransactionStartInputModel(optionalData),
        new TechsignServiceListener<TransactionStartReturnModel>() {
            @Override
            public void onSuccess(TransactionStartReturnModel data) {
                String transactionId = data.getTransactionId();
                String gestureType = data.getGestureType(); // EYE, MOUTH, HEAD-VERTICAL, HEAD-HORIZONTAL
                // Continue with document capture
            }

            @Override
            public void onFailure(Exception e) {
                // Show an error
            }
        });

Use transactionId in every following step.

Steps (controls)

Document	Method	controls
Turkish ID card	Camera	FRONT, BACK, HOLOGRAM, LIVENESS
Turkish ID card	NFC	FRONT, BACK, NFC, LIVENESS
Driving licence	Camera	FRONT, HOLOGRAM, LIVENESS
Passport	Camera	FRONT, LIVENESS
Passport	NFC	FRONT, NFC, LIVENESS

idType values: IDCARD, OLDIDCARD, DRIVERCARD, PASSPORT, BLUECARD, FOREIGNID.