/**
* Work out which restore method to use, depending on if it is a Trezor wallet or not and what
* backups there are
*/
public void calculateRestoreMethod() {
Optional<HardwareWalletService> hardwareWalletService =
CoreServices.getOrCreateHardwareWalletService();
// User has selected restore wallet - see if wallet is hard Trezor wallet
// If so no need to enter a seed phrase - use the rootNode from the master public key to work
// out the wallet id
HardwareWalletContext context = hardwareWalletService.get().getContext();
// Create a wallet id from the rootNode to work out the wallet root directory
if (context.getDeterministicKey().isPresent()) {
walletId = Optional.of(new WalletId(context.getDeterministicKey().get().getIdentifier()));
String walletRoot = WalletManager.createWalletRoot(walletId.get());
log.debug("Hardware wallet root : {}", walletRoot);
}
// Ensure Trezor is cancelled
hardwareWalletService.get().requestCancel();
restoreMethod = RESTORE_WALLET_HARD_TREZOR;
if (!isLocalZipBackupPresent()) {
// Next ask for the cloud backup location
state = RESTORE_WALLET_SELECT_BACKUP_LOCATION;
} else {
// Next select one of the local backups
state = RESTORE_WALLET_SELECT_BACKUP;
}
}
/**
* Create a Trezor hard wallet from a backup summary, decrypting it with a password created from
* the Trezor supplied entropy
*/
private boolean createTrezorHardWallet() {
// Get the model that contains the selected wallet backup to use
SelectBackupSummaryModel selectedBackupSummaryModel =
getWizardModel().getSelectBackupSummaryModel();
if (selectedBackupSummaryModel == null
|| selectedBackupSummaryModel.getValue() == null
|| selectedBackupSummaryModel.getValue().getFile() == null) {
log.debug("No wallet backup to use from the model");
return false;
}
log.debug(
"Loading hard wallet backup '" + selectedBackupSummaryModel.getValue().getFile() + "'");
try {
// For Trezor hard wallets the backups are encrypted with the entropy derived password
String walletPassword = null;
Optional<HardwareWalletService> hardwareWalletService =
CoreServices.getOrCreateHardwareWalletService();
if (hardwareWalletService.isPresent()
&& hardwareWalletService.get().getContext().getEntropy().isPresent()) {
walletPassword =
Hex.toHexString(hardwareWalletService.get().getContext().getEntropy().get());
}
// Check there is a wallet password - if not then cannot decrypt backup
if (walletPassword == null) {
log.debug(
"Cannot work out the password to decrypt the backup - there is no entropy from the Trezor");
return false;
}
KeyParameter backupAESKey =
AESUtils.createAESKey(
walletPassword.getBytes(Charsets.UTF_8), WalletManager.scryptSalt());
WalletId loadedWalletId =
BackupManager.INSTANCE.loadZipBackup(
selectedBackupSummaryModel.getValue().getFile(), backupAESKey);
// Attempt to open the wallet
final Optional<WalletSummary> walletSummaryOptional =
WalletManager.INSTANCE.openWalletFromWalletId(
InstallationManager.getOrCreateApplicationDataDirectory(),
loadedWalletId,
walletPassword);
// If the wallet is present then it was opened successfully
return walletSummaryOptional.isPresent();
} catch (Exception e) {
log.error("Failed to restore Trezor hard wallet.", e);
}
// Must have failed to be here
return false;
}
@Override
public void showPrevious() {
Optional<HardwareWalletService> hardwareWalletService;
switch (state) {
case WELCOME_LICENCE:
state = WELCOME_LICENCE;
break;
case WELCOME_SELECT_LANGUAGE:
state = WELCOME_LICENCE;
break;
case WELCOME_ATTACH_HARDWARE_WALLET:
state = WELCOME_SELECT_LANGUAGE;
break;
case WELCOME_SELECT_WALLET:
state = WELCOME_ATTACH_HARDWARE_WALLET;
break;
case CREATE_WALLET_PREPARATION:
state = WELCOME_SELECT_WALLET;
break;
case CREATE_WALLET_SELECT_BACKUP_LOCATION:
state = CREATE_WALLET_PREPARATION;
break;
case CREATE_WALLET_SEED_PHRASE:
state = CREATE_WALLET_SELECT_BACKUP_LOCATION;
break;
case CREATE_WALLET_CONFIRM_SEED_PHRASE:
state = CREATE_WALLET_SEED_PHRASE;
break;
case CREATE_WALLET_REPORT:
state = CREATE_WALLET_SEED_PHRASE;
break;
case TREZOR_CREATE_WALLET_PREPARATION:
hardwareWalletService = CoreServices.getOrCreateHardwareWalletService();
if (hardwareWalletService.isPresent() && hardwareWalletService.get().isDeviceReady()) {
// A Trezor is connected
mode = WelcomeWizardMode.TREZOR;
} else {
// Standard mode
mode = WelcomeWizardMode.STANDARD;
}
// Back out to select wallet as the most general solution
state = WELCOME_SELECT_WALLET;
break;
case TREZOR_CREATE_WALLET_SELECT_BACKUP_LOCATION:
state = TREZOR_CREATE_WALLET_PREPARATION;
break;
case TREZOR_CREATE_WALLET_ENTER_DETAILS:
state = TREZOR_CREATE_WALLET_SELECT_BACKUP_LOCATION;
break;
case TREZOR_CREATE_WALLET_REQUEST_CREATE_WALLET:
throw new IllegalStateException(
"'Previous' is not permitted here - user is committed to creating wallet");
case TREZOR_CREATE_WALLET_CONFIRM_CREATE_WALLET:
throw new IllegalStateException(
"'Previous' is not permitted here - user is committed to creating wallet");
case TREZOR_CREATE_WALLET_CONFIRM_ENTROPY:
throw new IllegalStateException(
"'Previous' is not permitted here - user is committed to creating wallet");
case TREZOR_CREATE_WALLET_ENTER_NEW_PIN:
throw new IllegalStateException(
"'Previous' is not permitted here - user is committed to creating wallet");
case TREZOR_CREATE_WALLET_CONFIRM_NEW_PIN:
throw new IllegalStateException(
"'Previous' is not permitted here - user is committed to creating wallet");
case TREZOR_CREATE_WALLET_CONFIRM_WORD:
throw new IllegalStateException(
"'Previous' is not permitted here - user is committed to creating wallet");
case TREZOR_CREATE_WALLET_REPORT:
throw new IllegalStateException(
"'Previous' is not permitted here - user is committed to creating wallet");
case RESTORE_PASSWORD_SEED_PHRASE:
state = WELCOME_SELECT_WALLET;
break;
case RESTORE_PASSWORD_REPORT:
state = RESTORE_PASSWORD_SEED_PHRASE;
break;
case RESTORE_WALLET_SEED_PHRASE:
state = WELCOME_SELECT_WALLET;
break;
case RESTORE_WALLET_SELECT_BACKUP_LOCATION:
state = RESTORE_WALLET_SEED_PHRASE;
break;
case RESTORE_WALLET_SELECT_BACKUP:
state = RESTORE_WALLET_SELECT_BACKUP_LOCATION;
break;
case RESTORE_WALLET_TIMESTAMP:
state = RESTORE_WALLET_SELECT_BACKUP_LOCATION;
break;
case RESTORE_WALLET_REPORT:
state = restoreMethod;
break;
default:
throw new IllegalStateException("Unknown state: " + state.name());
}
}
@Override
public void showNext() {
Optional<HardwareWalletService> hardwareWalletService;
switch (state) {
case WELCOME_LICENCE:
state = WELCOME_SELECT_LANGUAGE;
break;
case WELCOME_SELECT_LANGUAGE:
state = WELCOME_ATTACH_HARDWARE_WALLET;
break;
case WELCOME_ATTACH_HARDWARE_WALLET:
hardwareWalletService = CoreServices.getOrCreateHardwareWalletService();
if (hardwareWalletService.isPresent() && hardwareWalletService.get().isDeviceReady()) {
// A Trezor is connected
mode = WelcomeWizardMode.TREZOR;
if (hardwareWalletService.get().isWalletPresent()) {
// User may want to create or restore since they have an initialised device
state = WELCOME_SELECT_WALLET;
} else {
// User can only create from an uninitialised device
state = TREZOR_CREATE_WALLET_PREPARATION;
}
} else {
// Standard mode
mode = WelcomeWizardMode.STANDARD;
state = WELCOME_SELECT_WALLET;
}
break;
case WELCOME_SELECT_WALLET:
hardwareWalletService = CoreServices.getOrCreateHardwareWalletService();
if (RESTORE_WALLET_SELECT_BACKUP.equals(selectWalletChoice)) {
if (hardwareWalletService.isPresent()
&& hardwareWalletService.get().isDeviceReady()
&& hardwareWalletService.get().isWalletPresent()) {
// Initialised hardware wallet is attached
calculateRestoreMethod();
break;
}
} else {
// Ensure Trezor is reset if it is attached and initialised
if (hardwareWalletService.isPresent() && hardwareWalletService.get().isDeviceReady()) {
hardwareWalletService.get().requestCancel();
hardwareWalletService.get().getContext().resetToConnected();
}
state = selectWalletChoice;
}
break;
case CREATE_WALLET_PREPARATION:
state = CREATE_WALLET_SELECT_BACKUP_LOCATION;
break;
case CREATE_WALLET_SELECT_BACKUP_LOCATION:
state = CREATE_WALLET_SEED_PHRASE;
break;
case CREATE_WALLET_SEED_PHRASE:
state = CREATE_WALLET_CONFIRM_SEED_PHRASE;
// Fail safe to ensure that the generator hasn't gone screwy
Preconditions.checkState(
SeedPhraseSize.isValid(getCreateWalletSeedPhrase().size()),
"'actualSeedPhrase' is not a valid length");
break;
case CREATE_WALLET_CONFIRM_SEED_PHRASE:
state = CREATE_WALLET_CREATE_PASSWORD;
break;
case CREATE_WALLET_CREATE_PASSWORD:
state = CREATE_WALLET_REPORT;
break;
case CREATE_WALLET_REPORT:
throw new IllegalStateException("'Next' is not permitted here");
case TREZOR_CREATE_WALLET_PREPARATION:
state = TREZOR_CREATE_WALLET_SELECT_BACKUP_LOCATION;
break;
case TREZOR_CREATE_WALLET_SELECT_BACKUP_LOCATION:
state = TREZOR_CREATE_WALLET_ENTER_DETAILS;
break;
case TREZOR_CREATE_WALLET_ENTER_DETAILS:
state = TREZOR_CREATE_WALLET_REQUEST_CREATE_WALLET;
break;
case TREZOR_CREATE_WALLET_REQUEST_CREATE_WALLET:
state = TREZOR_CREATE_WALLET_CONFIRM_CREATE_WALLET;
break;
case TREZOR_CREATE_WALLET_CONFIRM_CREATE_WALLET:
state = TREZOR_CREATE_WALLET_CONFIRM_ENTROPY;
break;
case TREZOR_CREATE_WALLET_CONFIRM_ENTROPY:
state = TREZOR_CREATE_WALLET_ENTER_NEW_PIN;
break;
case TREZOR_CREATE_WALLET_ENTER_NEW_PIN:
state = TREZOR_CREATE_WALLET_CONFIRM_NEW_PIN;
break;
case TREZOR_CREATE_WALLET_CONFIRM_NEW_PIN:
state = TREZOR_CREATE_WALLET_CONFIRM_WORD;
break;
case TREZOR_CREATE_WALLET_CONFIRM_WORD:
state = TREZOR_CREATE_WALLET_REPORT;
break;
case TREZOR_CREATE_WALLET_REPORT:
break;
case RESTORE_PASSWORD_SEED_PHRASE:
state = RESTORE_PASSWORD_REPORT;
break;
case RESTORE_PASSWORD_REPORT:
break;
case RESTORE_WALLET_SEED_PHRASE:
if (!isLocalZipBackupPresent()) {
restoreMethod = RESTORE_WALLET_SELECT_BACKUP_LOCATION;
} else {
restoreMethod = RESTORE_WALLET_SELECT_BACKUP;
}
state = restoreMethod;
break;
case RESTORE_WALLET_SELECT_BACKUP_LOCATION:
if (isCloudBackupPresent()) {
restoreMethod = RESTORE_WALLET_SELECT_BACKUP;
} else {
restoreMethod = RESTORE_WALLET_TIMESTAMP;
}
state = restoreMethod;
break;
case RESTORE_WALLET_SELECT_BACKUP:
state = RESTORE_WALLET_REPORT;
break;
case RESTORE_WALLET_TIMESTAMP:
state = RESTORE_WALLET_REPORT;
break;
case RESTORE_WALLET_REPORT:
throw new IllegalStateException("'Next' is not permitted here");
default:
throw new IllegalStateException("Unknown state: " + state.name());
}
}