Integrate the claims module (#355)

* Integrate the claims.

* Remove accidetnal code.

* Update runtime/src/lib.rs

Co-Authored-By: thiolliere <gui.thiolliere@gmail.com>

* Add Config.

* Introduce claims to config

* Expose claims module signing Prefix (#358)

* Update parking_lot, bette trait args

polkadot/runtime/src/claims.rs

@@ -68,11 +68,11 @@ impl EcdsaSignature {
 
 decl_event!(
 	pub enum Event<T> where
-		B = BalanceOf<T>,
-		A = <T as system::Trait>::AccountId
+		Balance = BalanceOf<T>,
+		AccountId = <T as system::Trait>::AccountId
 	{
 		/// Someone claimed some DOTs.
-		Claimed(A, EthereumAddress, B),
+		Claimed(AccountId, EthereumAddress, Balance),
 	}
 );
 
@@ -96,6 +96,9 @@ decl_storage! {
 
 decl_module! {
 	pub struct Module<T: Trait> for enum Call where origin: T::Origin {
+		/// The Prefix that is used in signed Ethereum messages for this network
+		const Prefix: &[u8] = T::Prefix::get();
+
 		/// Deposit one of this module's events by using the default implementation.
 		fn deposit_event<T>() = default;