refactor contracts to use Time trait (#3717)

* refactor contracts to use Time trait

* bump version

substrate/srml/contracts/src/exec.rs

@@ -22,12 +22,11 @@ use crate::rent;
 
 use rstd::prelude::*;
 use sr_primitives::traits::{Bounded, CheckedAdd, CheckedSub, Zero};
-use support::traits::{WithdrawReason, Currency};
-use timestamp;
+use support::traits::{WithdrawReason, Currency, Time};
 
 pub type AccountIdOf<T> = <T as system::Trait>::AccountId;
 pub type CallOf<T> = <T as Trait>::Call;
-pub type MomentOf<T> = <T as timestamp::Trait>::Moment;
+pub type MomentOf<T> = <<T as Trait>::Time as Time>::Moment;
 pub type SeedOf<T> = <T as system::Trait>::Hash;
 pub type BlockNumberOf<T> = <T as system::Trait>::BlockNumber;
 
@@ -271,7 +270,7 @@ pub struct ExecutionContext<'a, T: Trait + 'a, V, L> {
 	pub config: &'a Config<T>,
 	pub vm: &'a V,
 	pub loader: &'a L,
-	pub timestamp: T::Moment,
+	pub timestamp: MomentOf<T>,
 	pub block_number: T::BlockNumber,
 }
 
@@ -296,7 +295,7 @@ where
 			config: &cfg,
 			vm: &vm,
 			loader: &loader,
-			timestamp: <timestamp::Module<T>>::now(),
+			timestamp: T::Time::now(),
 			block_number: <system::Module<T>>::block_number(),
 		}
 	}
@@ -665,7 +664,7 @@ struct CallContext<'a, 'b: 'a, T: Trait + 'b, V: Vm<T> + 'b, L: Loader<T>> {
 	ctx: &'a mut ExecutionContext<'b, T, V, L>,
 	caller: T::AccountId,
 	value_transferred: BalanceOf<T>,
-	timestamp: T::Moment,
+	timestamp: MomentOf<T>,
 	block_number: T::BlockNumber,
 }
 
@@ -757,7 +756,7 @@ where
 		system::Module::<T>::random(subject)
 	}
 
-	fn now(&self) -> &T::Moment {
+	fn now(&self) -> &MomentOf<T> {
 		&self.timestamp
 	}
 

substrate/srml/contracts/src/lib.rs

@@ -124,10 +124,9 @@ use support::{
 	Parameter, decl_module, decl_event, decl_storage, storage::child,
 	parameter_types,
 };
-use support::{traits::{OnFreeBalanceZero, OnUnbalanced, Currency, Get}, IsSubType};
+use support::{traits::{OnFreeBalanceZero, OnUnbalanced, Currency, Get, Time}, IsSubType};
 use system::{ensure_signed, RawOrigin, ensure_root};
 use primitives::storage::well_known_keys::CHILD_STORAGE_KEY_PREFIX;
-use timestamp;
 
 pub type CodeHash<T> = <T as system::Trait>::Hash;
 pub type TrieId = Vec<u8>;
@@ -333,8 +332,9 @@ parameter_types! {
 	pub const DefaultBlockGasLimit: u32 = 10_000_000;
 }
 
-pub trait Trait: timestamp::Trait {
+pub trait Trait: system::Trait {
 	type Currency: Currency<Self::AccountId>;
+	type Time: Time;
 
 	/// The outer call dispatch type.
 	type Call: Parameter + Dispatchable<Origin=<Self as system::Trait>::Origin> + IsSubType<Module<Self>, Self>;

substrate/srml/contracts/src/tests.rs

@@ -161,6 +161,7 @@ parameter_types! {
 }
 impl Trait for Test {
 	type Currency = Balances;
+	type Time = Timestamp;
 	type Call = Call;
 	type DetermineContractAddress = DummyContractAddressFor;
 	type Event = MetaEvent;
@@ -186,6 +187,7 @@ impl Trait for Test {
 }
 
 type Balances = balances::Module<Test>;
+type Timestamp = timestamp::Module<Test>;
 type Contract = Module<Test>;
 type System = system::Module<Test>;