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#![warn(missing_docs)]
#![warn(warnings)]
extern crate ethereum_types;
extern crate ethkey;
extern crate hidapi;
extern crate libusb;
extern crate parking_lot;
extern crate protobuf;
extern crate semver;
extern crate trezor_sys;
#[macro_use] extern crate log;
#[cfg(test)] extern crate rustc_hex;
mod ledger;
mod trezor;
use std::sync::{Arc, atomic, atomic::AtomicBool};
use std::{fmt, time::Duration};
use ethereum_types::U256;
use ethkey::{Address, Signature};
use parking_lot::Mutex;
const USB_DEVICE_CLASS_DEVICE: u8 = 0;
const POLLING_DURATION: Duration = Duration::from_millis(500);
#[derive(Debug)]
pub struct Device {
path: String,
info: WalletInfo,
}
pub trait Wallet<'a> {
type Error;
type Transaction;
fn sign_transaction(&self, address: &Address, transaction: Self::Transaction) -> Result<Signature, Self::Error>;
fn set_key_path(&self, key_path: KeyPath);
fn update_devices(&self, device_direction: DeviceDirection) -> Result<usize, Self::Error>;
fn read_device(&self, usb: &hidapi::HidApi, dev_info: &hidapi::HidDeviceInfo) -> Result<Device, Self::Error>;
fn list_devices(&self) -> Vec<WalletInfo>;
fn list_locked_devices(&self) -> Vec<String>;
fn get_wallet(&self, address: &Address) -> Option<WalletInfo>;
fn get_address(&self, device: &hidapi::HidDevice) -> Result<Option<Address>, Self::Error>;
fn open_path<R, F>(&self, f: F) -> Result<R, Self::Error>
where F: Fn() -> Result<R, &'static str>;
}
#[derive(Debug)]
pub enum Error {
LedgerDevice(ledger::Error),
TrezorDevice(trezor::Error),
Usb(libusb::Error),
Hid(String),
KeyNotFound,
}
pub struct TransactionInfo {
pub nonce: U256,
pub gas_price: U256,
pub gas_limit: U256,
pub to: Option<Address>,
pub value: U256,
pub data: Vec<u8>,
pub chain_id: Option<u64>,
}
#[derive(Debug, Clone)]
pub struct WalletInfo {
pub name: String,
pub manufacturer: String,
pub serial: String,
pub address: Address,
}
#[derive(Debug, Clone, Copy)]
pub enum KeyPath {
Ethereum,
EthereumClassic,
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match *self {
Error::KeyNotFound => write!(f, "Key not found for given address."),
Error::LedgerDevice(ref e) => write!(f, "{}", e),
Error::TrezorDevice(ref e) => write!(f, "{}", e),
Error::Usb(ref e) => write!(f, "{}", e),
Error::Hid(ref e) => write!(f, "{}", e),
}
}
}
impl From<ledger::Error> for Error {
fn from(err: ledger::Error) -> Self {
match err {
ledger::Error::KeyNotFound => Error::KeyNotFound,
_ => Error::LedgerDevice(err),
}
}
}
impl From<trezor::Error> for Error {
fn from(err: trezor::Error) -> Self {
match err {
trezor::Error::KeyNotFound => Error::KeyNotFound,
_ => Error::TrezorDevice(err),
}
}
}
impl From<libusb::Error> for Error {
fn from(err: libusb::Error) -> Self {
Error::Usb(err)
}
}
#[derive(Debug, Copy, Clone)]
pub enum DeviceDirection {
Arrived,
Left,
}
impl fmt::Display for DeviceDirection {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
DeviceDirection::Arrived => write!(f, "arrived"),
DeviceDirection::Left => write!(f, "left"),
}
}
}
pub struct HardwareWalletManager {
exiting: Arc<AtomicBool>,
ledger: Arc<ledger::Manager>,
trezor: Arc<trezor::Manager>,
}
impl HardwareWalletManager {
pub fn new() -> Result<Self, Error> {
let exiting = Arc::new(AtomicBool::new(false));
let hidapi = Arc::new(Mutex::new(hidapi::HidApi::new().map_err(|e| Error::Hid(e.to_string().clone()))?));
let ledger = ledger::Manager::new(hidapi.clone(), exiting.clone())?;
let trezor = trezor::Manager::new(hidapi.clone(), exiting.clone())?;
Ok(Self {
exiting,
ledger,
trezor,
})
}
pub fn set_key_path(&self, key_path: KeyPath) {
self.ledger.set_key_path(key_path);
self.trezor.set_key_path(key_path);
}
pub fn list_wallets(&self) -> Vec<WalletInfo> {
let mut wallets = Vec::new();
wallets.extend(self.ledger.list_devices());
wallets.extend(self.trezor.list_devices());
wallets
}
pub fn list_locked_wallets(&self) -> Result<Vec<String>, Error> {
Ok(self.trezor.list_locked_devices())
}
pub fn wallet_info(&self, address: &Address) -> Option<WalletInfo> {
if let Some(info) = self.ledger.get_wallet(address) {
Some(info)
} else {
self.trezor.get_wallet(address)
}
}
pub fn sign_message(&self, address: &Address, msg: &[u8]) -> Result<Signature, Error> {
if self.ledger.get_wallet(address).is_some() {
Ok(self.ledger.sign_message(address, msg)?)
} else if self.trezor.get_wallet(address).is_some() {
Err(Error::TrezorDevice(trezor::Error::NoSigningMessage))
} else {
Err(Error::KeyNotFound)
}
}
pub fn sign_transaction(&self, address: &Address, t_info: &TransactionInfo, encoded_transaction: &[u8]) -> Result<Signature, Error> {
if self.ledger.get_wallet(address).is_some() {
Ok(self.ledger.sign_transaction(address, encoded_transaction)?)
} else if self.trezor.get_wallet(address).is_some() {
Ok(self.trezor.sign_transaction(address, t_info)?)
} else {
Err(Error::KeyNotFound)
}
}
pub fn pin_matrix_ack(&self, path: &str, pin: &str) -> Result<bool, Error> {
self.trezor.pin_matrix_ack(path, pin).map_err(Error::TrezorDevice)
}
}
impl Drop for HardwareWalletManager {
fn drop(&mut self) {
self.exiting.store(true, atomic::Ordering::Release);
}
}