diff --git a/rpc/src/v1/impls/eth.rs b/rpc/src/v1/impls/eth.rs
index fb512d91a..dc5d8c081 100644
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@@ -37,7 +37,7 @@ use ethcore::filter::Filter as EthcoreFilter;
 use self::ethash::SeedHashCompute;
 use v1::traits::Eth;
 use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncInfo, Transaction, CallRequest, OptionalValue, Index, Filter, Log, Receipt};
-use v1::impls::dispatch_transaction;
+use v1::impls::{dispatch_transaction, error_codes};
 use serde;
 
 /// Eth rpc implementation.
@@ -218,13 +218,9 @@ fn from_params_default_third<F1, F2>(params: Params) -> Result<(F1, F2, BlockNum
 	}
 }
 
-// must be in range [-32099, -32000]
-const UNSUPPORTED_REQUEST_CODE: i64 = -32000;
-const NO_WORK_CODE: i64 = -32001;
-
 fn make_unsupported_err() -> Error {
 	Error {
-		code: ErrorCode::ServerError(UNSUPPORTED_REQUEST_CODE),
+		code: ErrorCode::ServerError(error_codes::UNSUPPORTED_REQUEST_CODE),
 		message: "Unsupported request.".into(),
 		data: None
 	}
@@ -232,7 +228,7 @@ fn make_unsupported_err() -> Error {
 
 fn no_work_err() -> Error {
 	Error {
-		code: ErrorCode::ServerError(NO_WORK_CODE),
+		code: ErrorCode::ServerError(error_codes::NO_WORK_CODE),
 		message: "Still syncing.".into(),
 		data: None
 	}
diff --git a/rpc/src/v1/impls/mod.rs b/rpc/src/v1/impls/mod.rs
index 03f4b34ed..8ea02b8b3 100644
--- a/rpc/src/v1/impls/mod.rs
+++ b/rpc/src/v1/impls/mod.rs
@@ -63,6 +63,15 @@ use util::rlp::encode;
 use util::bytes::ToPretty;
 use jsonrpc_core::{Error, ErrorCode, Value, to_value};
 
+mod error_codes {
+	// NOTE [ToDr] Codes from [-32099, -32000]
+	pub const UNSUPPORTED_REQUEST_CODE: i64 = -32000;
+	pub const NO_WORK_CODE: i64 = -32001;
+	pub const UNKNOWN_ERROR: i64 = -32002;
+	pub const TRANSACTION_ERROR: i64 = -32010;
+	pub const ACCOUNT_LOCKED: i64 = -32020;
+}
+
 fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> Result<Value, Error>
 	where C: MiningBlockChainClient, M: MinerService {
 	let hash = signed_transaction.hash();
@@ -102,13 +111,6 @@ fn sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, s
 	dispatch_transaction(&*client, &*miner, signed_transaction)
 }
 
-mod error_codes {
-	// NOTE [ToDr] Codes from -32000 to -32099
-	pub const UNKNOWN_ERROR: i64 = -32002;
-	pub const TRANSACTION_ERROR: i64 = -32010;
-	pub const ACCOUNT_LOCKED: i64 = -32020;
-}
-
 fn transaction_error(error: EthcoreError) -> Error {
 	use ethcore::error::TransactionError::*;