diff --git a/ethcore/src/client/mod.rs b/ethcore/src/client/mod.rs
index 27a1d3265..e54e8e382 100644
--- a/ethcore/src/client/mod.rs
+++ b/ethcore/src/client/mod.rs
@@ -49,6 +49,8 @@ use trace::LocalizedTrace;
 use evm::Factory as EvmFactory;
 use miner::{TransactionImportResult};
 use error::Error as EthError;
+pub use block_import_error::BlockImportError;
+pub use transaction_import::{TransactionImportResult, TransactionImportError};
 
 /// Options concerning what analytics we run on the call.
 #[derive(Eq, PartialEq, Default, Clone, Copy, Debug)]
@@ -188,7 +190,7 @@ pub trait BlockChainClient : Sync + Send {
 	fn last_hashes(&self) -> LastHashes;
 
 	/// import transactions from network/other 3rd party
-	fn import_transactions(&self, transactions: Vec<SignedTransaction>) -> Vec<Result<TransactionImportResult, EthError>>;
+	fn import_transactions(&self, transactions: Vec<SignedTransaction>) -> Vec<Result<TransactionImportResult, TransactionImportError>>;
 
 	/// Queue transactions for importing.
 	fn queue_transactions(&self, transactions: Vec<Bytes>);
diff --git a/ethcore/src/error.rs b/ethcore/src/error.rs
index 92d3cbe6b..7460762c2 100644
--- a/ethcore/src/error.rs
+++ b/ethcore/src/error.rs
@@ -250,7 +250,7 @@ impl fmt::Display for Error {
 }
 
 /// Result of import block operation.
-pub type ImportResult = Result<H256, Error>;
+pub type ImportResult = Result<H256, BlockImportError>;
 
 impl From<ClientError> for Error {
 	fn from(err: ClientError) -> Error {
@@ -312,6 +312,21 @@ impl From<TrieError> for Error {
 	}
 }
 
+impl From<BlockImportError> for Error {
+	fn from(err: BlockImportError) -> Error {
+		match err {
+			BlockImportError::Block(e) => Error::Block(e),
+			BlockImportError::Import(e) => Error::Import(e),
+			BlockImportError::Other(s) => Error::Util(UtilError::SimpleString(s)),
+		}
+	}
+}
+
+binary_fixed_size!(BlockError);
+binary_fixed_size!(ImportError);
+binary_fixed_size!(TransactionError);
+
+
 // TODO: uncomment below once https://github.com/rust-lang/rust/issues/27336 sorted.
 /*#![feature(concat_idents)]
 macro_rules! assimilate {
diff --git a/ethcore/src/types/block_import_error.rs b/ethcore/src/types/block_import_error.rs
new file mode 100644
index 000000000..8b400613f
--- /dev/null
+++ b/ethcore/src/types/block_import_error.rs
@@ -0,0 +1,44 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Block import error related types
+
+use std::mem;
+use ipc::binary::BinaryConvertError;
+use std::collections::VecDeque;
+use error::{ImportError, BlockError, Error};
+use std::convert::From;
+
+/// Error dedicated to import block function
+#[derive(Binary, Debug)]
+pub enum BlockImportError {
+	/// Import error
+	Import(ImportError),
+	/// Block error
+	Block(BlockError),
+	/// Other error
+	Other(String),
+}
+
+impl From<Error> for BlockImportError {
+	fn from(e: Error) -> Self {
+		match e {
+			Error::Block(block_error) => BlockImportError::Block(block_error),
+			Error::Import(import_error) => BlockImportError::Import(import_error),
+			_ => BlockImportError::Other(format!("other block import error: {:?}", e)),
+		}
+	}
+}
diff --git a/ethcore/src/types/mod.rs.in b/ethcore/src/types/mod.rs.in
index b51e9e57b..97579da8a 100644
--- a/ethcore/src/types/mod.rs.in
+++ b/ethcore/src/types/mod.rs.in
@@ -25,3 +25,5 @@ pub mod executed;
 pub mod block_status;
 pub mod account_diff;
 pub mod state_diff;
+pub mod transaction_import;
+pub mod block_import_error;
diff --git a/ethcore/src/types/transaction_import.rs b/ethcore/src/types/transaction_import.rs
new file mode 100644
index 000000000..78078cfea
--- /dev/null
+++ b/ethcore/src/types/transaction_import.rs
@@ -0,0 +1,46 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Transaction import result related types
+
+use ipc::binary::BinaryConvertError;
+use std::collections::VecDeque;
+
+#[derive(Debug, Clone, PartialEq)]
+/// Represents the result of importing transaction.
+pub enum TransactionImportResult {
+	/// Transaction was imported to current queue.
+	Current,
+	/// Transaction was imported to future queue.
+	Future
+}
+
+binary_fixed_size!(TransactionImportResult);
+
+#[derive(Debug, Clone, Binary)]
+pub enum TransactionImportError {
+	Transaction(TransactionError),
+	Other(String),
+}
+
+impl From<Error> for BlockImportError {
+	fn from(e: Error) -> Self {
+		match e {
+			Error::Transaction(transaction_error) => TransactionImportError::Transaction(block_error),
+			_ => TransactionImportError::Other(format!("other block import error: {:?}", e)),
+		}
+	}
+}