Use account_tx outbound filter, only query account_tx if the pending queue is non-empty
Use account_tx outbound filter, only query account_tx if the pending queue is non-empty

ripple/ripple-lib,ripple/ripple-lib,ripple/ripple-lib,wilsonianb/ripple-lib,wilsonianb/ripple-lib,darkdarkdragon/ripple-lib,darkdarkdragon/ripple-lib,ripple/ripple-lib,wilsonianb/ripple-lib,darkdarkdragon/ripple-lib