bg.js

var EventSource = require("eventsource")
var datapay = require("datapay")
var source = new EventSource("https://bitgraph.network/s/ewogICJ2IjogMywKICAicSI6IHsKICAgICJmaW5kIjogewogICAgICAib3V0LmgxIjogIjgwOGQiIAogICAgICAKICAgIH0KICB9LAogICJyIjogewogICAgImYiOiAiWy5bXSB8IC5vdXRbXSB8IHNlbGVjdCguYjAub3A/ID09IDEwNikgfCAuczJdIgogIH0KfQ==");
const privateKey = ""
source.onmessage = function(event) {
  var data = JSON.parse(event.data)
  console.log(data);
  console.log(data.type);
  if (data.type == "mempool") {
      var key = data;
      console.log(key)
  }
}
const tx = {
    data: ["0x808d", "Hello"],
    pay: { key: privateKey }
}
datapay.send(tx, function(err, res) {
    console.log("sent " + res)
})