From c20e76105122a4ac5c8095f070b9bf06d5702b30 Mon Sep 17 00:00:00 2001
From: Nikolay Volf <nikvolf@gmail.com>
Date: Tue, 15 Mar 2016 17:13:44 +0100
Subject: [PATCH] adding check for a sync

---
 rpc/src/v1/impls/eth.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/rpc/src/v1/impls/eth.rs b/rpc/src/v1/impls/eth.rs
index fda391304..66339241e 100644
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@@ -321,6 +321,14 @@ impl<C, S, A, M, EM> Eth for EthClient<C, S, A, M, EM>
 	fn work(&self, params: Params) -> Result<Value, Error> {
 		match params {
 			Params::None => {
+				// check if we a still syncing and return empty strings int that case
+				{
+					let sync = take_weak!(self.sync);
+					if sync.status().state != SyncState::Idle {
+						return to_value(&(String::new(), String::new(), String::new()));
+					}
+				}
+
 				let miner = take_weak!(self.miner);
 				let client = take_weak!(self.client);
 				let u = miner.sealing_block(client.deref()).lock().unwrap();