def transaction(self, to, amount_eth, wallet_path, password,
gas_price_gwei):
"""Converts input parameters for the underlying library."""
value = int(amount_eth * 1e18)
gas_price_wei = int(gas_price_gwei * 1e9)
to = to_checksum_address(to)
Dialog.snackbar_message("Sending transaction...")
tx_hash = self.pyetheroll.transaction(to, value, wallet_path, password,
gas_price_wei)
self.dialog_transaction_success(tx_hash)
def on_empty_account_list():
controller = App.get_running_app().root
keystore_dir = controller.account_utils.keystore_dir
title = "No account found"
body = f"No account found in:\n{keystore_dir}"
dialog = Dialog.create_dialog(title, body)
dialog.open()
def show_redirect_dialog(self):
title = "Account created, redirecting..."
body = ""
body += "Your account was created, "
body += "you will be redirected to the overview."
dialog = Dialog.create_dialog(title, body)
dialog.open()
def on_keyboard(self, window, key, *args):
"""
Handles the back button (Android) and ESC key. Goes back to the
previous screen, dicards dialogs or exits the application if none left.
"""
if key == 27:
if Dialog.dialogs:
Dialog.dismiss_all_dialogs()
return True
from etherollapp.etheroll.ui_utils import SubScreen
current_screen = self.screen_manager.current_screen
# if is sub-screen loads previous and stops the propagation
# otherwise propagates the key to exit
if isinstance(current_screen, SubScreen):
current_screen.on_back()
return True
return False
def player_roll_dice(self, bet_size_eth, chances, wallet_path, password,
gas_price_gwei):
"""
Sending the bet to the smart contract requires signing a transaction
which requires CPU computation to unlock the account, hence this
is ran in a thread.
"""
roll_screen = self.roll_screen
try:
Dialog.snackbar_message("Sending bet...")
roll_screen.toggle_widgets(False)
bet_size_wei = int(bet_size_eth * 1e18)
gas_price_wei = int(gas_price_gwei * 1e9)
tx_hash = self.pyetheroll.player_roll_dice(bet_size_wei, chances,
wallet_path, password,
gas_price_wei)
except (ValueError, ConnectionError) as exception:
roll_screen.toggle_widgets(True)
self.dialog_roll_error(exception)
return
roll_screen.toggle_widgets(True)
self.dialog_roll_success(tx_hash)
def dialog_roll_error(self, exception):
"""
Shows different error message depending on the exception.
On "MAC mismatch" (wrong password), void the cached password so the
user can try again refs:
https://github.com/AndreMiras/EtherollApp/issues/9
"""
title = "Error rolling"
body = str(exception)
if body == 'MAC mismatch':
title = "Wrong password"
body = "Can't unlock wallet, wrong password."
account = self.current_account
self._account_passwords.pop(account.address.hex())
dialog = Dialog.create_dialog(title, body)
dialog.open()
def try_unlock(account, password):
"""
Just as a security measure, verifies we can unlock
the newly created account with provided password.
"""
# making sure it's locked first
account.lock()
try:
account.unlock(password)
except ValueError:
title = "Unlock error"
body = ""
body += "Couldn't unlock your account.\n"
body += "The issue should be reported."
dialog = Dialog.create_dialog(title, body)
dialog.open()
return
def dialog(cls, account):
"""Prompt the password dialog."""
title = "Enter your password"
password_form = cls()
password_form.ids.account_id.text = "0x" + account.address.hex()
dialog = Dialog.create_dialog_content_helper(title=title,
content=password_form)
# workaround for MDDialog container size (too small by default)
dialog.ids.container.size_hint_y = 1
dialog.add_action_button(
"Unlock",
action=lambda *x: password_form.dispatch(
'on_unlock', dialog, account, password_form.password))
# hitting enter on the text should also submit
password_form.ids.password_id.bind(
on_text_validate=lambda *x: password_form.dispatch(
'on_unlock', dialog, account, password_form.password))
return dialog
def show_qr_code(self):
"""Shows address QR Code in a dialog."""
# lazy loading
from kivy_garden.qrcode import QRCodeWidget
from kivy.metrics import dp
account = self.current_account
if not account:
return
address = "0x" + account.address.hex()
title = address
qr_code = QRCodeWidget()
qr_code.data = address
dialog = Dialog.create_dialog_content_helper(title=title,
content=qr_code)
# workaround for MDDialog container size (too small by default)
dialog.ids.container.size_hint_y = 1
dialog.height = dp(500)
dialog.add_action_button("OK", action=lambda *x: dialog.dismiss())
dialog.open()
return dialog
def create_account(self):
"""
Creates an account from provided form.
Verify we can unlock it.
Disables widgets during the process, so the user doesn't try
to create another account during the process.
"""
self.toggle_widgets(False)
if not self.verify_fields():
Dialog.show_invalid_form_dialog()
self.toggle_widgets(True)
return
password = self.new_password1
Dialog.snackbar_message("Creating account...")
controller = App.get_running_app().root
account = controller.account_utils.new_account(password=password)
Dialog.snackbar_message("Created!")
self.toggle_widgets(True)
self.on_account_created(account)
# CreateNewAccount.try_unlock(account, password)
self.show_redirect_dialog()
self.load_landing_page()
return account
def on_connection_refused():
title = 'No network'
body = 'No network, could not retrieve roll history.'
dialog = Dialog.create_dialog(title, body)
dialog.open()
def on_permission_error(exception):
title = "Permission denied"
body = str(exception.args)
dialog = Dialog.create_dialog(title, body)
dialog.open()
def dialog_transaction_success(tx_hash):
title = "Transaction successful"
body = "Transaction hash:\n" + tx_hash.hex()
dialog = Dialog.create_dialog(title, body)
dialog.open()
def dialog_roll_success(tx_hash):
title = "Rolled successfully"
body = "Transaction hash:\n" + tx_hash.hex()
dialog = Dialog.create_dialog(title, body)
dialog.open()
def on_account_none():
"""Error dialog on no account selected."""
title = "No account selected"
body = "Please select an account before rolling"
dialog = Dialog.create_dialog(title, body)
dialog.open()
def on_connection_refused():
title = 'No network'
body = 'No network, could not retrieve account balance.'
dialog = Dialog.create_dialog(title, body)
dialog.open()
