public ListenableFuture<PaymentIncrementAck> incrementPayment(Coin size) throws ValueOutOfRangeException, IllegalStateException {
        return channelClient.incrementPayment(size, null, null);
    }
public ListenableFuture < PaymentIncrementAck > incrementPayment ( Coin size ) throws ValueOutOfRangeException , IllegalStateException { return channelClient . incrementPayment ( size , null , null ) ; }
Increments the total value which we pay the server.

@param size How many satoshis to increment the payment by (note: not the new total).
@throws ValueOutOfRangeException If the size is negative or would pay more than this channel's total value
({@link PaymentChannelClientConnection#state()}.getTotalValue())
@throws IllegalStateException If the channel has been closed or is not yet open
(see {@link PaymentChannelClientConnection#getChannelOpenFuture()} for the second)