fix #2439

gui/qt/main_window.py

@@ -45,8 +45,7 @@ from electrum import keystore
 from electrum.bitcoin import COIN, is_valid, TYPE_ADDRESS
 from electrum.plugins import run_hook
 from electrum.i18n import _
-from electrum.util import (block_explorer, block_explorer_info, format_time,
-                           block_explorer_URL, format_satoshis, PrintError,
+from electrum.util import (format_time, format_satoshis, PrintError,
                            format_satoshis_plain, NotEnoughFunds,
                            UserCancelled)
 from electrum import Transaction, mnemonic
@@ -2526,12 +2525,12 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
         unit_combo.currentIndexChanged.connect(on_unit)
         gui_widgets.append((unit_label, unit_combo))
 
-        block_explorers = sorted(block_explorer_info.keys())
+        block_explorers = sorted(util.block_explorer_info().keys())
         msg = _('Choose which online block explorer to use for functions that open a web browser')
         block_ex_label = HelpLabel(_('Online Block Explorer') + ':', msg)
         block_ex_combo = QComboBox()
         block_ex_combo.addItems(block_explorers)
-        block_ex_combo.setCurrentIndex(block_ex_combo.findText(block_explorer(self.config)))
+        block_ex_combo.setCurrentIndex(block_ex_combo.findText(util.block_explorer(self.config)))
         def on_be(x):
             be_result = block_explorers[block_ex_combo.currentIndex()]
             self.config.set_key('block_explorer', be_result, True)

lib/util.py

@@ -343,7 +343,7 @@ def time_difference(distance_in_time, include_seconds):
     else:
         return "over %d years" % (round(distance_in_minutes / 525600))
 
-block_explorer_info = {
+mainnet_block_explorers = {
     'Biteasy.com': ('https://www.biteasy.com/blockchain',
                         {'tx': 'transactions', 'addr': 'addresses'}),
     'Bitflyer.jp': ('https://chainflyer.bitflyer.jp',
@@ -370,11 +370,22 @@ block_explorer_info = {
                         {'tx': 'tx', 'addr': 'address'}),
 }
 
+testnet_block_explorers = {
+    'Blocktrail.com': ('https://www.blocktrail.com/tBTC',
+                       {'tx': 'tx', 'addr': 'address'}),
+    'system default': ('blockchain:',
+                       {'tx': 'tx', 'addr': 'address'}),
+}
+
+def block_explorer_info():
+    import bitcoin
+    return testnet_block_explorers if bitcoin.TESTNET else mainnet_block_explorers
+
 def block_explorer(config):
-    return config.get('block_explorer', 'Blockchain.info')
+    return config.get('block_explorer', 'Blocktrail.com')
 
 def block_explorer_tuple(config):
-    return block_explorer_info.get(block_explorer(config))
+    return block_explorer_info().get(block_explorer(config))
 
 def block_explorer_URL(config, kind, item):
     be_tuple = block_explorer_tuple(config)