Associated type Hasher for QueryPreimage, StorePreimage and Bounded (#1720)

I hope it's enough to fix #1701 
the only solution I found to make it happen is to put an associated type
to the `Bounded` enum as well.
@liamaharon @kianenigma @bkchr 

Polkadot address: 12poSUQPtcF1HUPQGY3zZu2P8emuW9YnsPduA4XG3oCEfJVp

---------

Signed-off-by: muraca <mmuraca247@gmail.com>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

substrate/frame/referenda/src/benchmarking.rs

@@ -25,7 +25,7 @@ use frame_benchmarking::v1::{
 };
 use frame_support::{
 	assert_ok,
-	traits::{Bounded, Currency, EnsureOrigin, EnsureOriginWithArg, UnfilteredDispatchable},
+	traits::{Currency, EnsureOrigin, EnsureOriginWithArg, UnfilteredDispatchable},
 };
 use frame_system::RawOrigin;
 use sp_runtime::traits::Bounded as ArithBounded;
@@ -42,7 +42,7 @@ fn funded_account<T: Config<I>, I: 'static>(name: &'static str, index: u32) -> T
 	caller
 }
 
-fn dummy_call<T: Config<I>, I: 'static>() -> Bounded<<T as Config<I>>::RuntimeCall> {
+fn dummy_call<T: Config<I>, I: 'static>() -> BoundedCallOf<T, I> {
 	let inner = frame_system::Call::remark { remark: vec![] };
 	let call = <T as Config<I>>::RuntimeCall::from(inner);
 	T::Preimages::bound(call).unwrap()

substrate/frame/referenda/src/lib.rs

@@ -73,8 +73,8 @@ use frame_support::{
 			v3::{Anon as ScheduleAnon, Named as ScheduleNamed},
 			DispatchTime,
 		},
-		Currency, Hash as PreimageHash, LockIdentifier, OnUnbalanced, OriginTrait, PollStatus,
-		Polling, QueryPreimage, ReservableCurrency, StorePreimage, VoteTally,
+		Currency, LockIdentifier, OnUnbalanced, OriginTrait, PollStatus, Polling, QueryPreimage,
+		ReservableCurrency, StorePreimage, VoteTally,
 	},
 	BoundedVec,
 };
@@ -163,8 +163,17 @@ pub mod pallet {
 		/// Weight information for extrinsics in this pallet.
 		type WeightInfo: WeightInfo;
 		/// The Scheduler.
-		type Scheduler: ScheduleAnon<BlockNumberFor<Self>, CallOf<Self, I>, PalletsOriginOf<Self>>
-			+ ScheduleNamed<BlockNumberFor<Self>, CallOf<Self, I>, PalletsOriginOf<Self>>;
+		type Scheduler: ScheduleAnon<
+				BlockNumberFor<Self>,
+				CallOf<Self, I>,
+				PalletsOriginOf<Self>,
+				Hasher = Self::Hashing,
+			> + ScheduleNamed<
+				BlockNumberFor<Self>,
+				CallOf<Self, I>,
+				PalletsOriginOf<Self>,
+				Hasher = Self::Hashing,
+			>;
 		/// Currency type for this pallet.
 		type Currency: ReservableCurrency<Self::AccountId>;
 		// Origins and unbalances.
@@ -226,7 +235,7 @@ pub mod pallet {
 			>;
 
 		/// The preimage provider.
-		type Preimages: QueryPreimage + StorePreimage;
+		type Preimages: QueryPreimage<H = Self::Hashing> + StorePreimage;
 	}
 
 	/// The next free referendum index, aka the number of referenda started so far.
@@ -257,14 +266,14 @@ pub mod pallet {
 		StorageMap<_, Twox64Concat, TrackIdOf<T, I>, u32, ValueQuery>;
 
 	/// The metadata is a general information concerning the referendum.
-	/// The `PreimageHash` refers to the preimage of the `Preimages` provider which can be a JSON
+	/// The `Hash` refers to the preimage of the `Preimages` provider which can be a JSON
 	/// dump or IPFS hash of a JSON file.
 	///
 	/// Consider a garbage collection for a metadata of finished referendums to `unrequest` (remove)
 	/// large preimages.
 	#[pallet::storage]
 	pub type MetadataOf<T: Config<I>, I: 'static = ()> =
-		StorageMap<_, Blake2_128Concat, ReferendumIndex, PreimageHash>;
+		StorageMap<_, Blake2_128Concat, ReferendumIndex, T::Hash>;
 
 	#[pallet::event]
 	#[pallet::generate_deposit(pub(super) fn deposit_event)]
@@ -376,14 +385,14 @@ pub mod pallet {
 			/// Index of the referendum.
 			index: ReferendumIndex,
 			/// Preimage hash.
-			hash: PreimageHash,
+			hash: T::Hash,
 		},
 		/// Metadata for a referendum has been cleared.
 		MetadataCleared {
 			/// Index of the referendum.
 			index: ReferendumIndex,
 			/// Preimage hash.
-			hash: PreimageHash,
+			hash: T::Hash,
 		},
 	}
 
@@ -691,7 +700,7 @@ pub mod pallet {
 		pub fn set_metadata(
 			origin: OriginFor<T>,
 			index: ReferendumIndex,
-			maybe_hash: Option<PreimageHash>,
+			maybe_hash: Option<T::Hash>,
 		) -> DispatchResult {
 			let who = ensure_signed(origin)?;
 			if let Some(hash) = maybe_hash {

substrate/frame/referenda/src/mock.rs

@@ -473,7 +473,7 @@ impl RefState {
 }
 
 /// note a new preimage without registering.
-pub fn note_preimage(who: u64) -> PreimageHash {
+pub fn note_preimage(who: u64) -> <Test as frame_system::Config>::Hash {
 	use std::sync::atomic::{AtomicU8, Ordering};
 	// note a new preimage on every function invoke.
 	static COUNTER: AtomicU8 = AtomicU8::new(0);

substrate/frame/referenda/src/tests.rs

@@ -599,9 +599,8 @@ fn curve_handles_all_inputs() {
 #[test]
 fn set_metadata_works() {
 	ExtBuilder::default().build_and_execute(|| {
-		use frame_support::traits::Hash as PreimageHash;
 		// invalid preimage hash.
-		let invalid_hash: PreimageHash = [1u8; 32].into();
+		let invalid_hash: <Test as frame_system::Config>::Hash = [1u8; 32].into();
 		// fails to set metadata for a finished referendum.
 		assert_ok!(Referenda::submit(
 			RuntimeOrigin::signed(1),

substrate/frame/referenda/src/types.rs

@@ -34,7 +34,8 @@ pub type NegativeImbalanceOf<T, I> = <<T as Config<I>>::Currency as Currency<
 	<T as frame_system::Config>::AccountId,
 >>::NegativeImbalance;
 pub type CallOf<T, I> = <T as Config<I>>::RuntimeCall;
-pub type BoundedCallOf<T, I> = Bounded<<T as Config<I>>::RuntimeCall>;
+pub type BoundedCallOf<T, I> =
+	Bounded<<T as Config<I>>::RuntimeCall, <T as frame_system::Config>::Hashing>;
 pub type VotesOf<T, I> = <T as Config<I>>::Votes;
 pub type TallyOf<T, I> = <T as Config<I>>::Tally;
 pub type PalletsOriginOf<T> =