Get the block timestamp using the Time trait

crates/pallet-domains/src/lib.rs

@@ -223,7 +223,7 @@ mod pallet {
     use frame_support::pallet_prelude::*;
     use frame_support::traits::fungible::{Inspect, InspectHold, Mutate, MutateHold};
     use frame_support::traits::tokens::Preservation;
-    use frame_support::traits::Randomness as RandomnessT;
+    use frame_support::traits::{Randomness as RandomnessT, Time};
     use frame_support::weights::Weight;
     use frame_support::{Identity, PalletError};
     use frame_system::pallet_prelude::*;
@@ -390,6 +390,9 @@ mod pallet {
         /// Storage fee interface used to deal with bundle storage fee
         type StorageFee: StorageFee<BalanceOf<Self>>;
 
+        /// The block timestamp
+        type BlockTimestamp: Time;
+
         /// The block slot
         type BlockSlot: BlockSlot<Self>;
 
@@ -1913,7 +1916,11 @@ mod pallet {
                     Into::<H256>::into(Self::extrinsics_shuffling_seed()).to_fixed_bytes(),
                 );
 
-                let timestamp = Moment::default();
+                // There is no actual conversion here, but the trait bounds required to prove that
+                // (and debug-print the error in expect()) are very verbose.
+                let timestamp = TryInto::<Moment>::try_into(T::BlockTimestamp::now())
+                    .map_err(|_| ())
+                    .expect("Moment is the same type in both pallets; qed");
 
                 let invalid_inherent_extrinsic_data = InvalidInherentExtrinsicData {
                     extrinsics_shuffling_seed,

crates/pallet-domains/src/tests.rs

@@ -263,6 +263,7 @@ impl pallet_domains::Config for Test {
     type Randomness = MockRandomness;
     type PalletId = DomainsPalletId;
     type StorageFee = DummyStorageFee;
+    type BlockTimestamp = pallet_timestamp::Pallet<Test>;
     type BlockSlot = DummyBlockSlot;
     type DomainsTransfersTracker = MockDomainsTransfersTracker;
     type MaxInitialDomainAccounts = MaxInitialDomainAccounts;

crates/subspace-runtime/src/lib.rs

@@ -836,6 +836,7 @@ impl pallet_domains::Config for Runtime {
     type Randomness = Subspace;
     type PalletId = DomainsPalletId;
     type StorageFee = TransactionFees;
+    type BlockTimestamp = pallet_timestamp::Pallet<Runtime>;
     type BlockSlot = BlockSlot;
     type BundleLongevity = BundleLongevity;
     type DomainsTransfersTracker = Transporter;

test/subspace-test-runtime/src/lib.rs

@@ -766,6 +766,7 @@ impl pallet_domains::Config for Runtime {
     type MinNominatorStake = MinNominatorStake;
     type PalletId = DomainsPalletId;
     type StorageFee = TransactionFees;
+    type BlockTimestamp = pallet_timestamp::Pallet<Runtime>;
     type BlockSlot = BlockSlot;
     type BundleLongevity = BundleLongevity;
     type DomainsTransfersTracker = Transporter;