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accounts/usbwallet: Ledger teardown on health-check failure

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This commit is contained in:
Péter Szilágyi 2017-02-09 03:28:22 +02:00
parent 205ea95802
commit fb19846855
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GPG Key ID: E9AE538CEDF8293D
2 changed files with 33 additions and 8 deletions
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8
accounts/usbwallet/ledger_hub.go
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@ -130,12 +130,12 @@ func (hub *LedgerHub) refreshWallets() {
url := accounts.URL{Scheme: LedgerScheme, Path: fmt.Sprintf("%03d:%03d", busID>>8, busID&0xff)}
// Drop wallets while they were in front of the next account
for len(hub.wallets) > 0 && hub.wallets[0].URL().Cmp(url) < 0 {
// Drop wallets in front of the next device or those that failed for some reason
for len(hub.wallets) > 0 && (hub.wallets[0].URL().Cmp(url) < 0 || hub.wallets[0].(*ledgerWallet).failed()) {
events = append(events, accounts.WalletEvent{Wallet: hub.wallets[0], Arrive: false})
hub.wallets = hub.wallets[1:]
}
// If there are no more wallets or the account is before the next, wrap new wallet
// If there are no more wallets or the device is before the next, wrap new wallet
if len(hub.wallets) == 0 || hub.wallets[0].URL().Cmp(url) > 0 {
wallet := &ledgerWallet{context: hub.ctx, hardwareID: devID, locationID: busID, url: &url}
@ -143,7 +143,7 @@ func (hub *LedgerHub) refreshWallets() {
wallets = append(wallets, wallet)
continue
}
// If the account is the same as the first wallet, keep it
// If the device is the same as the first wallet, keep it
if hub.wallets[0].URL().Cmp(url) == 0 {
wallets = append(wallets, hub.wallets[0])
hub.wallets = hub.wallets[1:]

33
accounts/usbwallet/ledger_wallet.go
View File

@ -128,6 +128,15 @@ func (w *ledgerWallet) offline() bool {
return w.version == [3]byte{0, 0, 0}
}
// failed returns if the USB device wrapped by the wallet failed for some reason.
// This is used by the device scanner to report failed wallets as departed.
func (w *ledgerWallet) failed() bool {
w.lock.RLock()
defer w.lock.RUnlock()
return w.failure != nil
}
// Open implements accounts.Wallet, attempting to open a USB connection to the
// Ledger hardware wallet. The Ledger does not require a user passphrase so that
// is silently discarded.
@ -231,6 +240,8 @@ func (w *ledgerWallet) heartbeat() {
w.lock.Lock()
if err := w.resolveVersion(); err == usb.ERROR_IO || err == usb.ERROR_NO_DEVICE {
w.failure = err
w.close()
fail = err
}
w.lock.Unlock()
@ -253,15 +264,29 @@ func (w *ledgerWallet) Close() error {
w.lock.Lock()
defer w.lock.Unlock()
if err := w.device.Close(); err != nil {
w.quit = nil
if err := w.close(); err != nil {
return err
}
w.device, w.input, w.output, w.paths, w.quit = nil, nil, nil, nil, nil
w.version = [3]byte{}
return herr // If all went well, return any health-check errors
}
// close is the internal wallet closer that terminates the USB connection and
// resets all the fields to their defaults. It assumes the lock is held.
func (w *ledgerWallet) close() error {
// Allow duplicate closes, especially for health-check failures
if w.device == nil {
return nil
}
// Close the device, clear everything, then return
err := w.device.Close()
w.device, w.input, w.output = nil, nil, nil
w.version, w.paths = [3]byte{}, nil
return err
}
// Accounts implements accounts.Wallet, returning the list of accounts pinned to
// the Ledger hardware wallet. If self derivation was enabled, the account list
// is periodically expanded based on current chain state.