add payment requests to kivy

gui/kivy/main_window.py

@@ -193,9 +193,24 @@ def __init__(self, **kwargs):
         self._trigger_notify_transactions = \
             Clock.create_trigger(self.notify_transactions, 5)
 
+    def on_pr(self, pr):
+        from electrum.paymentrequest import PR_UNPAID, PR_PAID, PR_UNKNOWN, PR_EXPIRED
+        if pr.verify(self.contacts):
+            key = self.invoices.add(pr)
+            status = self.invoices.get_status(key)
+            #self.invoices_screen.update()
+            if status == PR_PAID:
+                self.show_message("invoice already paid")
+                self.send_screen.do_clear()
+            else:
+                self.send_screen.set_request(pr)
+        else:
+            self.show_message("invoice error:" + pr.error)
+            self.send_screen.do_clear()
+
     def set_URI(self, url):
         try:
-            url = electrum.util.parse_URI(url)
+            url = electrum.util.parse_URI(url, self.on_pr)
         except:
             self.show_info("Invalid URI", url)
             return
@@ -214,12 +229,7 @@ def on_qr_result(requestCode, resultCode, intent):
                 if resultCode == -1: # RESULT_OK:
                     contents = intent.getStringExtra("SCAN_RESULT")
                     if intent.getStringExtra("SCAN_RESULT_FORMAT") == 'QR_CODE':
-                        try:
-                            uri = electrum.util.parse_URI(contents)
-                        except:
-                            self.show_info("Invalid URI", url)
-                            return
-                        on_complete(uri)
+                        on_complete(contents)
         activity.bind(on_activity_result=on_qr_result)
         PythonActivity.mActivity.startActivityForResult(intent, 0)
 

gui/kivy/uix/screens.py

@@ -181,6 +181,7 @@ def on_release(self, *args):
 class SendScreen(CScreen):
 
     kvname = 'send'
+    payment_request = None
 
     def set_URI(self, uri):
         print "set uri", uri
@@ -195,6 +196,16 @@ def do_clear(self):
         self.screen.amount = ''
         self.screen.message = ''
         self.screen.address = ''
+        self.payment_request = None
+
+    def set_request(self, pr):
+        if pr.has_expired():
+            self.app.show_error(_('Payment request has expired'))
+            return
+        self.payment_request = pr
+        self.screen.address = pr.get_requestor()
+        self.screen.amount = self.app.format_amount(pr.get_amount())
+        self.screen.message = pr.get_memo()
 
     def do_paste(self):
         contents = unicode(self.app._clipboard.get())
@@ -206,18 +217,24 @@ def do_paste(self):
         self.set_URI(uri)
 
     def do_send(self):
-        address = str(self.screen.address)
-        if not bitcoin.is_address(address):
-            self.app.show_error(_('Invalid Bitcoin Address') + ':\n' + address)
-            return
-        try:
-            amount = self.app.get_amount(self.screen.amount)
-        except:
-            self.app.show_error(_('Invalid amount') + ':\n' + self.screen.amount)
-            return
+        if self.payment_request:
+            if self.payment_request.has_expired():
+                self.app.show_error(_('Payment request has expired'))
+                return
+            outputs = self.payment_request.get_outputs()
+        else:
+            address = str(self.screen.address)
+            if not bitcoin.is_address(address):
+                self.app.show_error(_('Invalid Bitcoin Address') + ':\n' + address)
+                return
+            try:
+                amount = self.app.get_amount(self.screen.amount)
+            except:
+                self.app.show_error(_('Invalid amount') + ':\n' + self.screen.amount)
+                return
+            outputs = [('address', address, amount)]
         message = unicode(self.screen.message)
         fee = None
-        outputs = [('address', address, amount)]
         self.app.protected(self.send_tx, (outputs, fee, message))
 
     def send_tx(self, *args):

gui/kivy/uix/ui_screens/send.kv

@@ -78,7 +78,7 @@ SendScreen:
                 id: qr
                 text: _('QR Code')
                 on_release:
-                    app.scan_qr(on_complete=s.parent.set_URI)
+                    app.scan_qr(on_complete=app.set_URI)
             Button:
                 id: paste_button
                 text: _('Paste')

gui/qt/main_window.py

@@ -83,7 +83,6 @@ def keyPressEvent(self, e):
 
 
 from electrum.paymentrequest import PR_UNPAID, PR_PAID, PR_UNKNOWN, PR_EXPIRED
-from electrum.paymentrequest import PaymentRequest, get_payment_request
 
 pr_icons = {
     PR_UNPAID:":icons/unpaid.png",
@@ -1346,37 +1345,28 @@ def payment_request_error(self):
         self.payment_request = None
         self.do_clear()
 
+    def on_pr(self, request):
+        self.payment_request = request
+        if self.payment_request.verify(self.contacts):
+            self.emit(SIGNAL('payment_request_ok'))
+        else:
+            self.emit(SIGNAL('payment_request_error'))
+
     def pay_to_URI(self, URI):
         if not URI:
             return
         try:
-            out = util.parse_URI(unicode(URI))
-        except Exception as e:
+            out = util.parse_URI(unicode(URI), self.on_pr)
+        except BaseException as e:
             QMessageBox.warning(self, _('Error'), _('Invalid bitcoin URI:') + '\n' + str(e), _('OK'))
             return
         self.tabs.setCurrentIndex(1)
-
         r = out.get('r')
         sig = out.get('sig')
         name = out.get('name')
         if r or (name and sig):
-            def get_payment_request_thread():
-                if name and sig:
-                    from electrum import paymentrequest
-                    pr = paymentrequest.serialize_request(out).SerializeToString()
-                    self.payment_request = paymentrequest.PaymentRequest(pr)
-                else:
-                    self.payment_request = get_payment_request(r)
-                if self.payment_request.verify(self.contacts):
-                    self.emit(SIGNAL('payment_request_ok'))
-                else:
-                    self.emit(SIGNAL('payment_request_error'))
-            t = threading.Thread(target=get_payment_request_thread)
-            t.setDaemon(True)
-            t.start()
             self.prepare_for_payment_request()
             return
-
         address = out.get('address')
         amount = out.get('amount')
         label = out.get('label')

lib/util.py

@@ -317,7 +317,7 @@ def block_explorer_URL(config, kind, item):
 #_ud = re.compile('%([0-9a-hA-H]{2})', re.MULTILINE)
 #urldecode = lambda x: _ud.sub(lambda m: chr(int(m.group(1), 16)), x)
 
-def parse_URI(uri):
+def parse_URI(uri, on_pr=None):
     import bitcoin
     from bitcoin import COIN
 
@@ -364,6 +364,22 @@ def parse_URI(uri):
     if 'sig' in out:
         out['sig'] = bitcoin.base_decode(out['sig'], None, base=58).encode('hex')
 
+    r = out.get('r')
+    sig = out.get('sig')
+    name = out.get('name')
+    if r or (name and sig):
+        def get_payment_request_thread():
+            import paymentrequest as pr
+            if name and sig:
+                s = pr.serialize_request(out).SerializeToString()
+                request = pr.PaymentRequest(s)
+            else:
+                request = pr.get_payment_request(r)
+            on_pr(request)
+        t = threading.Thread(target=get_payment_request_thread)
+        t.setDaemon(True)
+        t.start()
+
     return out