Update substrate and codec crate aliases (#54)

* Replace substrate crate aliases with actual crate names

* Alias parity-scale-codec to just codec, like in substrate

* Format code

src/frame/balances.rs

@@ -22,17 +22,13 @@ use futures::future::{
     self,
     Future,
 };
-use parity_scale_codec::{
-    Codec,
-    Encode,
-};
 
+use frame_support::Parameter;
 use sp_runtime::traits::{
     MaybeSerialize,
     Member,
     SimpleArithmetic,
 };
-use frame_support::Parameter;
 
 use crate::{
     error::Error,
@@ -49,7 +45,7 @@ pub trait Balances: System {
     type Balance: Parameter
         + Member
         + SimpleArithmetic
-        + Codec
+        + codec::Codec
         + Default
         + Copy
         + MaybeSerialize
@@ -118,7 +114,7 @@ const MODULE: &str = "Balances";
 const TRANSFER: &str = "transfer";
 
 /// Arguments for transferring a balance
-#[derive(Encode)]
+#[derive(codec::Encode)]
 pub struct TransferArgs<T: Balances> {
     to: <T as System>::Address,
     #[codec(compact)]

src/frame/contracts.rs

@@ -16,13 +16,12 @@
 
 //! Implements support for the pallet_contracts module.
 
-use parity_scale_codec::Encode;
-
 use crate::frame::{
     balances::Balances,
     system::System,
     Call,
 };
+use codec::Encode;
 
 const MODULE: &str = "Contracts";
 const PUT_CODE: &str = "put_code";

src/frame/mod.rs

@@ -16,7 +16,7 @@
 
 //! Implements support for built-in runtime modules.
 
-use parity_scale_codec::Encode;
+use codec::Encode;
 
 pub mod balances;
 pub mod contracts;

src/frame/system.rs

@@ -18,13 +18,14 @@
 
 use std::fmt::Debug;
 
+use codec::Codec;
 use futures::future::{
     self,
     Future,
 };
-use parity_scale_codec::Codec;
 use serde::de::DeserializeOwned;
 
+use frame_support::Parameter;
 use sp_runtime::traits::{
     Bounded,
     CheckEqual,
@@ -38,7 +39,6 @@ use sp_runtime::traits::{
     SimpleBitOps,
     StaticLookup,
 };
-use frame_support::Parameter;
 
 use crate::{
     error::Error,
@@ -170,7 +170,7 @@ pub fn set_code(code: Vec<u8>) -> Call<SetCode> {
 }
 
 /// Event for the System module.
-#[derive(Clone, Debug, parity_scale_codec::Decode)]
+#[derive(Clone, Debug, codec::Decode)]
 pub enum SystemEvent {
     /// An extrinsic completed successfully.
     ExtrinsicSuccess(frame_support::weights::DispatchInfo),