Fix is_syncing so it's false as long as the update is trivial.

rpc/src/v1/impls/eth.rs

@@ -234,11 +234,17 @@ impl<C, S, A, M, EM> Eth for EthClient<C, S, A, M, EM>
 				let status = take_weak!(self.sync).status();
 				let res = match status.state {
 					SyncState::Idle => SyncStatus::None,
-					SyncState::Waiting | SyncState::Blocks | SyncState::NewBlocks | SyncState::ChainHead => SyncStatus::Info(SyncInfo {
-						starting_block: U256::from(status.start_block_number),
-						current_block: U256::from(take_weak!(self.client).chain_info().best_block_number),
-						highest_block: U256::from(status.highest_block_number.unwrap_or(status.start_block_number))
-					})
+					SyncState::Waiting | SyncState::Blocks | SyncState::NewBlocks | SyncState::ChainHead => {
+						let info = SyncInfo {
+							starting_block: U256::from(status.start_block_number),
+							current_block: U256::from(take_weak!(self.client).chain_info().best_block_number),
+							highest_block: U256::from(status.highest_block_number.unwrap_or(status.start_block_number))
+						};
+						match info.highest_block > info.starting_block + U256::from(6) {
+							true => SyncStatus::Info(info),
+							false => SyncStatus::None,
+						}
+					}
 				};
 				to_value(&res)
 			}