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https://github.com/XRPLF/xrpl-dev-portal.git
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75 lines
2.7 KiB
Python
75 lines
2.7 KiB
Python
# "Build a Wallet" tutorial, step 2: Watch ledger closes from a worker thread.
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import xrpl
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import wx
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# New dependencies
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from threading import Thread
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import wx.lib.newevent
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# Set up an event type to pass info from the worker thread to the main thread
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GotNewLedger, EVT_NEW_LEDGER = wx.lib.newevent.NewEvent()
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class XRPLMonitorThread(Thread):
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"""
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A worker thread to watch for new ledger events and pass the info back to
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the main frame to be shown in the UI. Using a thread lets us maintain the
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responsiveness of the UI while doing work in the background.
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"""
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def __init__(self, ws_url, gui):
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Thread.__init__(self, daemon=True)
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self.gui = gui
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self.ws_url = ws_url
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self.client = xrpl.clients.WebsocketClient(self.ws_url)
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def run(self):
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self.client.open()
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# Subscribe to ledger updates
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#TODO: use request/response and on for this
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self.client.send(xrpl.models.requests.Subscribe(
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id="ledger_sub",
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streams=[xrpl.models.requests.StreamParameter.LEDGER]
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))
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# Watch for messages in the client
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for message in self.client:
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if message.get("id") == "ledger_sub":
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# Immediate response to our subscribe command.
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wx.QueueEvent(self.gui, GotNewLedger(data=message["result"]))
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elif message.get("type") == "ledgerClosed":
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# Ongoing notifications that new ledgers have been validated.
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wx.QueueEvent(self.gui, GotNewLedger(data=message))
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else:
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print("Unhandled message:", message)
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class TWaXLFrame(wx.Frame):
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"""
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Tutorial Wallet for the XRP Ledger (TWaXL)
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user interface, main frame.
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"""
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def __init__(self, url):
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wx.Frame.__init__(self, None, title="TWaXL", size=wx.Size(800,400))
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main_panel = wx.Panel(self)
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main_sizer = wx.BoxSizer(wx.VERTICAL)
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main_panel.SetSizer(main_sizer)
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self.st = wx.StaticText(main_panel, label="Not connected")
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main_sizer.Add(self.st, wx.SizerFlags().Border(wx.TOP|wx.LEFT, 25))
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self.Bind(EVT_NEW_LEDGER, self.update_ledger)
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XRPLMonitorThread(url, self).start()
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def update_ledger(self, event):
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message = event.data
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self.st.SetLabel(f"Latest validated ledger:\n"
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f"Ledger Index: {message['ledger_index']}\n"
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f"Ledger Hash: {message['ledger_hash']}")
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if __name__ == "__main__":
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#JSON_RPC_URL = "https://s.altnet.rippletest.net:51234/"
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#JSON_RPC_URL = "http://localhost:5005/"
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WS_URL = "wss://s.altnet.rippletest.net:51233"
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app = wx.App()
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frame = TWaXLFrame(WS_URL)
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frame.Show()
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app.MainLoop()
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