add ability to show a receiving address on ledger screen (#3538)

add ability to show a receiving address on ledger screen

plugins/ledger/ledger.py

@@ -436,6 +436,20 @@ class Ledger_KeyStore(Hardware_KeyStore):
         tx.raw = tx.serialize()
         self.signing = False
 
+    def show_address(self, sequence, txin_type):
+        self.signing = True
+        # prompt for the PIN before displaying the dialog if necessary
+        client = self.get_client()
+        address_path = self.get_derivation()[2:] + "/%d/%d"%sequence
+        self.handler.show_message(_("Showing address ..."))
+        segwit = txin_type in ['p2wpkh', 'p2wsh', 'p2wpkh-p2sh', 'p2wsh-p2sh']
+        try:
+            self.get_client().getWalletPublicKey(address_path, showOnScreen=True, segwit=segwit)
+        except:
+            pass
+        finally:
+            self.handler.finished()
+        self.signing = False
 
 class LedgerPlugin(HW_PluginBase):
     libraries_available = BTCHIP
@@ -508,3 +522,8 @@ class LedgerPlugin(HW_PluginBase):
         if client is not None:
             client.checkDevice()
         return client
+
+    def show_address(self, wallet, address):
+        sequence = wallet.get_address_index(address)
+        txin_type = wallet.get_txin_type(address)
+        wallet.get_keystore().show_address(sequence, txin_type)

plugins/ledger/qt.py

@@ -3,6 +3,8 @@ import threading
 from PyQt5.Qt import QInputDialog, QLineEdit, QVBoxLayout, QLabel
 
 from electrum.i18n import _
+from electrum.plugins import hook
+from electrum.wallet import Standard_Wallet
 from .ledger import LedgerPlugin
 from ..hw_wallet.qt import QtHandlerBase, QtPluginBase
 from electrum_gui.qt.util import *
@@ -16,6 +18,17 @@ class Plugin(LedgerPlugin, QtPluginBase):
     def create_handler(self, window):
         return Ledger_Handler(window)
 
+    @hook
+    def receive_menu(self, menu, addrs, wallet):
+        print('receive_menu')
+        if type(wallet) is not Standard_Wallet:
+            return
+        keystore = wallet.get_keystore()
+        if type(keystore) == self.keystore_class and len(addrs) == 1:
+            def show_address():
+                keystore.thread.add(partial(self.show_address, wallet, addrs[0]))
+            menu.addAction(_("Show on Ledger"), show_address)
+
 class Ledger_Handler(QtHandlerBase):
     setup_signal = pyqtSignal()
     auth_signal = pyqtSignal(object)