Decouple contract from balances (#2081)

* decouple contract from balance

* update impls and builds

* set fees in contract module

* builds

substrate/node/runtime/src/lib.rs

@@ -59,7 +59,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	impl_name: create_runtime_str!("substrate-node"),
 	authoring_version: 10,
 	spec_version: 46,
-	impl_version: 46,
+	impl_version: 47,
 	apis: RUNTIME_API_VERSIONS,
 };
 
@@ -167,6 +167,7 @@ impl treasury::Trait for Runtime {
 }
 
 impl contract::Trait for Runtime {
+	type Currency = balances::Module<Runtime>;
 	type Call = Call;
 	type Event = Event;
 	type Gas = u64;

substrate/node/runtime/wasm/Cargo.lock

@@ -2204,7 +2204,6 @@ dependencies = [
  "sr-primitives 0.1.0",
  "sr-sandbox 0.1.0",
  "sr-std 0.1.0",
- "srml-balances 0.1.0",
  "srml-support 0.1.0",
  "srml-system 0.1.0",
  "srml-timestamp 0.1.0",