Merge branch 'master' into auth-round

ethcore/src/error.rs

@@ -76,6 +76,8 @@ pub enum TransactionError {
 	RecipientBanned,
 	/// Contract creation code is banned.
 	CodeBanned,
+	/// Invalid network ID given.
+	InvalidNetworkId,
 }
 
 impl fmt::Display for TransactionError {
@@ -99,6 +101,7 @@ impl fmt::Display for TransactionError {
 			SenderBanned => "Sender is temporarily banned.".into(),
 			RecipientBanned => "Recipient is temporarily banned.".into(),
 			CodeBanned => "Contract code is temporarily banned.".into(),
+			InvalidNetworkId => "Transaction of this network ID is not allowed on this chain.".into(),
 		};
 
 		f.write_fmt(format_args!("Transaction error ({})", msg))