@Override
    public void getAvailableForPayoutAmount(ProtoGetAvailableForPayoutAmountRequest request,
                                            StreamObserver<ProtoGetAvailableForPayoutAmountResponse> responseObserver) {
        ProtoGetAvailableForPayoutAmountInnerRequest.Builder innerRequestBuilder = ProtoGetAvailableForPayoutAmountInnerRequest.newBuilder();

        Int32Value punterId = request.hasPunterSessionCtx() ? punterSessionHashResolver.prepareProtoPunterId(request.getPunterSessionCtx()) : null;
        if (punterId != null) innerRequestBuilder.setPunterId(punterId);


        ProtoGetAvailableForPayoutAmountResponse.Builder responseBuilder = ProtoGetAvailableForPayoutAmountResponse.newBuilder();
        if (true) {
            responseBuilder.setOperationResult(OK);
            ListenableFuture<ProtoFeedbackResponse> transform =
                Futures.transform(stub.getAvailableForPayoutAmount(innerRequestBuilder.build()),
                    (ProtoGetAvailableForPayoutAmountInnerResponse innerResponse) ->
                    {
                        if (innerResponse != null && innerResponse.hasPayload()) {
                            responseBuilder.setOperationResult(OK);
                            responseBuilder.setPayload(innerResponse.getPayload());
                        } else {
                            responseBuilder.setOperationResult(NULL_PAYLOAD);
                        }
                        return responseBuilder.build();
                    });
            Futures.addCallback(transform, getCallback(responseObserver));
        } else {
            responseBuilder.setOperationResult(FAIL_CHECK);
            responseObserver.onNext(responseBuilder.build());
            responseObserver.onCompleted();
        }
    }