Importing accounts from files. (#5644)

* Importing accounts from files.

* whitespace

[ci:skip]

ethstore/src/dir/mod.rs

@@ -90,7 +90,7 @@ pub trait VaultKeyDirectory: KeyDirectory {
 	fn set_meta(&self, meta: &str) -> Result<(), Error>;
 }
 
-pub use self::disk::RootDiskDirectory;
+pub use self::disk::{RootDiskDirectory, DiskKeyFileManager, KeyFileManager};
 pub use self::memory::MemoryDirectory;
 pub use self::vault::VaultDiskDirectory;
 

ethstore/src/import.rs

@@ -15,10 +15,29 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use std::collections::HashSet;
+use std::path::Path;
+use std::fs;
+
 use ethkey::Address;
-use dir::{paths, KeyDirectory, RootDiskDirectory};
+use dir::{paths, KeyDirectory, RootDiskDirectory, DiskKeyFileManager, KeyFileManager};
 use Error;
 
+/// Import an account from a file.
+pub fn import_account(path: &Path, dst: &KeyDirectory) -> Result<Address, Error> {
+	let key_manager = DiskKeyFileManager;
+	let existing_accounts = dst.load()?.into_iter().map(|a| a.address).collect::<HashSet<_>>();
+	let filename = path.file_name().and_then(|n| n.to_str()).map(|f| f.to_owned());
+	let account = fs::File::open(&path)
+		.map_err(Into::into)
+		.and_then(|file| key_manager.read(filename, file))?;
+
+	let address = account.address.clone();
+	if !existing_accounts.contains(&address) {
+		dst.insert(account)?;
+	}
+	Ok(address)
+}
+
 /// Import all accounts from one directory to the other.
 pub fn import_accounts(src: &KeyDirectory, dst: &KeyDirectory) -> Result<Vec<Address>, Error> {
 	let accounts = src.load()?;

ethstore/src/lib.rs

@@ -57,7 +57,7 @@ mod secret_store;
 pub use self::account::{SafeAccount, Crypto};
 pub use self::error::Error;
 pub use self::ethstore::{EthStore, EthMultiStore};
-pub use self::import::{import_accounts, read_geth_accounts};
+pub use self::import::{import_account, import_accounts, read_geth_accounts};
 pub use self::json::OpaqueKeyFile as KeyFile;
 pub use self::presale::PresaleWallet;
 pub use self::secret_store::{