Merge pull request #675 from ethcore/rpc_unit_tests

fixed U256 and transaction request deserialization

util/bigint/src/uint.rs

@@ -39,7 +39,6 @@
 use std::fmt;
 use std::cmp;
 
-use std::mem;
 use std::str::{FromStr};
 use std::convert::From;
 use std::hash::{Hash, Hasher};
@@ -788,14 +787,11 @@ macro_rules! construct_uint {
 
 					fn visit_str<E>(&mut self, value: &str) -> Result<Self::Value, E> where E: serde::Error {
 						// 0x + len
-						if value.len() != 2 + $n_words / 8 {
+						if value.len() > 2 + $n_words * 16 {
 							return Err(serde::Error::custom("Invalid length."));
 						}
 
-						match $name::from_str(&value[2..]) {
-							Ok(val) => Ok(val),
-							Err(_) => { return Err(serde::Error::custom("Invalid length.")); }
-						}
+						$name::from_str(&value[2..]).map_err(|_| serde::Error::custom("Invalid hex value."))
 					}
 
 					fn visit_string<E>(&mut self, value: String) -> Result<Self::Value, E> where E: serde::Error {