Export account RPC (#4967)

* Export account RPC

* Removing GethDirectory and ParityDirectory

* Updating ethstore-cli help.

ethstore/src/json/key_file.rs

@@ -16,11 +16,31 @@
 
 use std::fmt;
 use std::io::{Read, Write};
-use serde::{Deserialize, Deserializer};
+use serde::{Serialize, Serializer, Deserialize, Deserializer};
 use serde::de::{Error, Visitor, MapVisitor};
 use serde_json;
 use super::{Uuid, Version, Crypto, H160};
 
+/// Public opaque type representing serializable `KeyFile`.
+#[derive(Debug, PartialEq)]
+pub struct OpaqueKeyFile {
+	key_file: KeyFile
+}
+
+impl Serialize for OpaqueKeyFile {
+	fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
+		S: Serializer,
+	{
+		self.key_file.serialize(serializer)
+	}
+}
+
+impl<T> From<T> for OpaqueKeyFile where T: Into<KeyFile> {
+	fn from(val: T) -> Self {
+		OpaqueKeyFile { key_file: val.into() }
+	}
+}
+
 #[derive(Debug, PartialEq, Serialize)]
 pub struct KeyFile {
 	pub id: Uuid,

ethstore/src/json/mod.rs

@@ -36,7 +36,7 @@ pub use self::error::Error;
 pub use self::hash::{H128, H160, H256};
 pub use self::id::Uuid;
 pub use self::kdf::{Kdf, KdfSer, Prf, Pbkdf2, Scrypt, KdfSerParams};
-pub use self::key_file::KeyFile;
+pub use self::key_file::{KeyFile, OpaqueKeyFile};
 pub use self::presale::{PresaleWallet, Encseed};
 pub use self::vault_file::VaultFile;
 pub use self::vault_key_file::{VaultKeyFile, VaultKeyMeta, insert_vault_name_to_json_meta, remove_vault_name_from_json_meta};