gets a future which returns this when the channel is successfully opened , or throws an exception if there is an error before the channel has reached the open state . after this future completes successfully , you may call paymentchannelclientconnection #incrementpayment java.math.biginteger to begin paying the server . concode_field_sep SettableFuture<PaymentChannelClientConnection> channelOpenFuture concode_elem_sep ProtobufParser<Protos.TwoWayChannelMessage> wireParser concode_elem_sep PaymentChannelClient channelClient concode_field_sep void disconnectWithoutSettlement concode_elem_sep void settle concode_elem_sep ListenableFuture<BigInteger> incrementPayment concode_elem_sep PaymentChannelClientState state