I've tried this several different ways using obeserveEvent and I can't get it to work. I have however figured out a way to use eventReactive to do what I need.
textInput("in_address", "Enter Address to Validate")
actionButton("submit", "submit")
Column
`-----------
# define reactive shiny function on button click
submitAddress <- eventReactive(input$submit, {
GetAddress(input$in_address)
})
# render plot for dynamically resizing to browser window
renderText({submitAddress()
})