Ledger wallet support (#4486)

* Ledger devices support

* structs for RPC types

ethcore/Cargo.toml

@@ -42,6 +42,7 @@ rlp = { path = "../util/rlp" }
 ethcore-stratum = { path = "../stratum" }
 lru-cache = "0.1.0"
 ethcore-bloom-journal = { path = "../util/bloom" }
+hardware-wallet = { path = "../hw" }
 ethabi = "0.2.2"
 
 [dependencies.hyper]

ethcore/src/account_provider/mod.rs

@@ -29,6 +29,7 @@ use ethstore::{SimpleSecretStore, SecretStore, Error as SSError, EthStore, EthMu
 use ethstore::dir::MemoryDirectory;
 use ethstore::ethkey::{Address, Message, Public, Secret, Random, Generator};
 use ethjson::misc::AccountMeta;
+use hardware_wallet::{Error as HardwareError, HardwareWalletManager, KeyPath};
 pub use ethstore::ethkey::Signature;
 
 /// Type of unlock.
@@ -55,6 +56,10 @@ struct AccountData {
 pub enum SignError {
 	/// Account is not unlocked
 	NotUnlocked,
+	/// Account does not exist.
+	NotFound,
+	/// Low-level hardware device error.
+	Hardware(HardwareError),
 	/// Low-level error from store
 	SStore(SSError)
 }
@@ -63,11 +68,19 @@ impl fmt::Display for SignError {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
 		match *self {
 			SignError::NotUnlocked => write!(f, "Account is locked"),
+			SignError::NotFound => write!(f, "Account does not exist"),
+			SignError::Hardware(ref e) => write!(f, "{}", e),
 			SignError::SStore(ref e) => write!(f, "{}", e),
 		}
 	}
 }
 
+impl From<HardwareError> for SignError {
+	fn from(e: HardwareError) -> Self {
+		SignError::Hardware(e)
+	}
+}
+
 impl From<SSError> for SignError {
 	fn from(e: SSError) -> Self {
 		SignError::SStore(e)
@@ -107,17 +120,47 @@ pub struct AccountProvider {
 	sstore: Box<SecretStore>,
 	/// Accounts unlocked with rolling tokens
 	transient_sstore: EthMultiStore,
+	/// Accounts in hardware wallets.
+	hardware_store: Option<HardwareWalletManager>,
+}
+
+/// Account management settings.
+pub struct AccountProviderSettings {
+	/// Enable hardware wallet support.
+	pub enable_hardware_wallets: bool,
+	/// Use the classic chain key on the hardware wallet.
+	pub hardware_wallet_classic_key: bool,
+}
+
+impl Default for AccountProviderSettings {
+	fn default() -> Self {
+		AccountProviderSettings {
+			enable_hardware_wallets: false,
+			hardware_wallet_classic_key: false,
+		}
+	}
 }
 
 impl AccountProvider {
 	/// Creates new account provider.
-	pub fn new(sstore: Box<SecretStore>) -> Self {
+	pub fn new(sstore: Box<SecretStore>, settings: AccountProviderSettings) -> Self {
+		let mut hardware_store = None;
+		if settings.enable_hardware_wallets {
+			match HardwareWalletManager::new() {
+				Ok(manager) => {
+					manager.set_key_path(if settings.hardware_wallet_classic_key { KeyPath::EthereumClassic } else { KeyPath::Ethereum });
+					hardware_store = Some(manager)
+				},
+				Err(e) => warn!("Error initializing hardware wallets: {}", e),
+			}
+		}
 		AccountProvider {
 			unlocked: RwLock::new(HashMap::new()),
 			address_book: RwLock::new(AddressBook::new(&sstore.local_path())),
 			dapps_settings: RwLock::new(DappsSettingsStore::new(&sstore.local_path())),
 			sstore: sstore,
 			transient_sstore: transient_sstore(),
+			hardware_store: hardware_store,
 		}
 	}
 
@@ -129,6 +172,7 @@ impl AccountProvider {
 			dapps_settings: RwLock::new(DappsSettingsStore::transient()),
 			sstore: Box::new(EthStore::open(Box::new(MemoryDirectory::default())).expect("MemoryDirectory load always succeeds; qed")),
 			transient_sstore: transient_sstore(),
+			hardware_store: None,
 		}
 	}
 
@@ -176,6 +220,12 @@ impl AccountProvider {
 		Ok(accounts.into_iter().map(|a| a.address).collect())
 	}
 
+	/// Returns addresses of hardware accounts.
+	pub fn hardware_accounts(&self) -> Result<Vec<Address>, Error> {
+		let accounts = self.hardware_store.as_ref().map_or(Vec::new(), |h| h.list_wallets());
+		Ok(accounts.into_iter().map(|a| a.address).collect())
+	}
+
 	/// Sets a whitelist of accounts exposed for unknown dapps.
 	/// `None` means that all accounts will be visible.
 	pub fn set_new_dapps_whitelist(&self, accounts: Option<Vec<Address>>) -> Result<(), Error> {
@@ -271,21 +321,43 @@ impl AccountProvider {
 
 	/// Returns each account along with name and meta.
 	pub fn accounts_info(&self) -> Result<HashMap<Address, AccountMeta>, Error> {
-		let r: HashMap<Address, AccountMeta> = self.sstore.accounts()?
+		let r = self.sstore.accounts()?
 			.into_iter()
 			.map(|a| (a.address.clone(), self.account_meta(a.address).ok().unwrap_or_default()))
 			.collect();
 		Ok(r)
 	}
 
+	/// Returns each hardware account along with name and meta.
+	pub fn hardware_accounts_info(&self) -> Result<HashMap<Address, AccountMeta>, Error> {
+		let r = self.hardware_accounts()?
+			.into_iter()
+			.map(|address| (address.clone(), self.account_meta(address).ok().unwrap_or_default()))
+			.collect();
+		Ok(r)
+	}
+
+	/// Returns each hardware account along with name and meta.
+	pub fn is_hardware_address(&self, address: Address) -> bool {
+		self.hardware_store.as_ref().and_then(|s| s.wallet_info(&address)).is_some()
+	}
+
 	/// Returns each account along with name and meta.
 	pub fn account_meta(&self, address: Address) -> Result<AccountMeta, Error> {
-		let account = self.sstore.account_ref(&address)?;
-		Ok(AccountMeta {
-			name: self.sstore.name(&account)?,
-			meta: self.sstore.meta(&account)?,
-			uuid: self.sstore.uuid(&account).ok().map(Into::into),	// allowed to not have a Uuid
-		})
+		if let Some(info) = self.hardware_store.as_ref().and_then(|s| s.wallet_info(&address)) {
+			Ok(AccountMeta {
+				name: info.name,
+				meta: info.manufacturer,
+				uuid: None,
+			})
+		} else {
+			let account = self.sstore.account_ref(&address)?;
+			Ok(AccountMeta {
+				name: self.sstore.name(&account)?,
+				meta: self.sstore.meta(&account)?,
+				uuid: self.sstore.uuid(&account).ok().map(Into::into),	// allowed to not have a Uuid
+			})
+		}
 	}
 
 	/// Returns each account along with name and meta.
@@ -505,6 +577,15 @@ impl AccountProvider {
 		self.sstore.set_vault_meta(name, meta)
 			.map_err(Into::into)
 	}
+
+	/// Sign transaction with hardware wallet.
+	pub fn sign_with_hardware(&self, address: Address, transaction: &[u8]) -> Result<Signature, SignError> {
+		match self.hardware_store.as_ref().map(|s| s.sign_transaction(&address, transaction)) {
+			None | Some(Err(HardwareError::KeyNotFound)) => Err(SignError::NotFound),
+			Some(Err(e)) => Err(From::from(e)),
+			Some(Ok(s)) => Ok(s),
+		}
+	}
 }
 
 #[cfg(test)]

ethcore/src/lib.rs

@@ -105,6 +105,7 @@ extern crate linked_hash_map;
 extern crate lru_cache;
 extern crate ethcore_stratum;
 extern crate ethabi;
+extern crate hardware_wallet;
 
 #[macro_use]
 extern crate log;

ethcore/src/types/transaction.rs

@@ -154,7 +154,7 @@ impl Transaction {
 	pub fn hash(&self, network_id: Option<u64>) -> H256 {
 		let mut stream = RlpStream::new();
 		self.rlp_append_unsigned_transaction(&mut stream, network_id);
-		stream.out().sha3()
+		stream.as_raw().sha3()
 	}
 
 	/// Signs the transaction as coming from `sender`.