MEL: Origin, Referenda, ConvictionVoting

frame/collective/src/lib.rs

@@ -48,7 +48,7 @@ use sp_runtime::{traits::Hash, RuntimeDebug};
 use sp_std::{marker::PhantomData, prelude::*, result};
 
 use frame_support::{
-	codec::{Decode, Encode},
+	codec::{Decode, Encode, MaxEncodedLen},
 	dispatch::{DispatchError, DispatchResultWithPostInfo, Dispatchable, PostDispatchInfo},
 	ensure,
 	traits::{Backing, ChangeMembers, EnsureOrigin, Get, GetBacking, InitializeMembers},
@@ -122,8 +122,9 @@ impl DefaultVote for MoreThanMajorityThenPrimeDefaultVote {
 }
 
 /// Origin for the collective module.
-#[derive(PartialEq, Eq, Clone, RuntimeDebug, Encode, Decode, TypeInfo)]
+#[derive(PartialEq, Eq, Clone, RuntimeDebug, Encode, Decode, TypeInfo, MaxEncodedLen)]
 #[scale_info(skip_type_params(I))]
+#[codec(mel_bound(AccountId: MaxEncodedLen))]
 pub enum RawOrigin<AccountId, I> {
 	/// It has been condoned by a given number of members of the collective from a given total.
 	Members(MemberCount, MemberCount),

frame/conviction-voting/Cargo.toml

@@ -14,8 +14,9 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 assert_matches = "1.3.0"
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = [
+codec = { package = "parity-scale-codec", version = "3.0.3", default-features = false, features = [
 	"derive",
+	"max-encoded-len",
 ] }
 scale-info = { version = "2.1.1", default-features = false, features = ["derive"] }
 serde = { version = "1.0.136", features = ["derive"], optional = true }

frame/conviction-voting/src/lib.rs

@@ -87,12 +87,11 @@ type ClassOf<T, I = ()> = <<T as Config<I>>::Polls as Polling<TallyOf<T, I>>>::C
 #[frame_support::pallet]
 pub mod pallet {
 	use super::*;
-	use frame_support::pallet_prelude::*;
+	use frame_support::{pallet_prelude::*, traits::ClassCountOf};
 	use frame_system::pallet_prelude::*;
 
 	#[pallet::pallet]
 	#[pallet::generate_store(pub(super) trait Store)]
-	#[pallet::without_storage_info]
 	pub struct Pallet<T, I = ()>(_);
 
 	#[pallet::config]
@@ -154,7 +153,7 @@ pub mod pallet {
 		_,
 		Twox64Concat,
 		T::AccountId,
-		Vec<(ClassOf<T, I>, BalanceOf<T, I>)>,
+		BoundedVec<(ClassOf<T, I>, BalanceOf<T, I>), ClassCountOf<T::Polls, TallyOf<T, I>>>,
 		ValueQuery,
 	>;
 
@@ -616,7 +615,15 @@ impl<T: Config<I>, I: 'static> Pallet<T, I> {
 		ClassLocksFor::<T, I>::mutate(who, |locks| {
 			match locks.iter().position(|x| &x.0 == class) {
 				Some(i) => locks[i].1 = locks[i].1.max(amount),
-				None => locks.push((class.clone(), amount)),
+				None => {
+					let ok = locks.try_push((class.clone(), amount)).is_ok();
+					debug_assert!(
+						ok,
+						"Vec bounded by number of classes; \
+						all items in Vec associated with a unique class; \
+						qed"
+					);
+				},
 			}
 		});
 		T::Currency::extend_lock(CONVICTION_VOTING_ID, who, amount, WithdrawReasons::TRANSFER);
@@ -632,7 +639,13 @@ impl<T: Config<I>, I: 'static> Pallet<T, I> {
 		let lock_needed = ClassLocksFor::<T, I>::mutate(who, |locks| {
 			locks.retain(|x| &x.0 != class);
 			if !class_lock_needed.is_zero() {
-				locks.push((class.clone(), class_lock_needed));
+				let ok = locks.try_push((class.clone(), class_lock_needed)).is_ok();
+				debug_assert!(
+					ok,
+					"Vec bounded by number of classes; \
+					all items in Vec associated with a unique class; \
+					qed"
+				);
 			}
 			locks.iter().map(|x| x.1).max().unwrap_or(Zero::zero())
 		});

frame/conviction-voting/src/types.rs

@@ -43,6 +43,7 @@ use crate::{AccountVote, Conviction, Vote};
 	MaxEncodedLen,
 )]
 #[scale_info(skip_type_params(Total))]
+#[codec(mel_bound(Votes: MaxEncodedLen))]
 pub struct Tally<Votes: Clone + PartialEq + Eq + Debug + TypeInfo + Codec, Total> {
 	/// The number of aye votes, expressed in terms of post-conviction lock-vote.
 	pub ayes: Votes,

frame/conviction-voting/src/vote.rs

@@ -162,6 +162,7 @@ pub struct Delegating<Balance, AccountId, BlockNumber> {
 /// Information concerning the direct vote-casting of some voting power.
 #[derive(Encode, Decode, Clone, Eq, PartialEq, RuntimeDebug, TypeInfo, MaxEncodedLen)]
 #[scale_info(skip_type_params(MaxVotes))]
+#[codec(mel_bound(Balance: MaxEncodedLen, BlockNumber: MaxEncodedLen, PollIndex: MaxEncodedLen))]
 pub struct Casting<Balance, BlockNumber, PollIndex, MaxVotes>
 where
 	MaxVotes: Get<u32>,
@@ -177,6 +178,10 @@ where
 /// An indicator for what an account is doing; it can either be delegating or voting.
 #[derive(Encode, Decode, Clone, Eq, PartialEq, RuntimeDebug, TypeInfo, MaxEncodedLen)]
 #[scale_info(skip_type_params(MaxVotes))]
+#[codec(mel_bound(
+	Balance: MaxEncodedLen, AccountId: MaxEncodedLen, BlockNumber: MaxEncodedLen,
+	PollIndex: MaxEncodedLen,
+))]
 pub enum Voting<Balance, AccountId, BlockNumber, PollIndex, MaxVotes>
 where
 	MaxVotes: Get<u32>,

frame/ranked-collective/src/lib.rs

@@ -86,6 +86,7 @@ pub type Votes = u32;
 	MaxEncodedLen,
 )]
 #[scale_info(skip_type_params(M))]
+#[codec(mel_bound())]
 pub struct Tally<M: GetMaxVoters> {
 	bare_ayes: MemberIndex,
 	ayes: Votes,

frame/referenda/Cargo.toml

@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 assert_matches = { version = "1.5", optional = true }
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = [
+codec = { package = "parity-scale-codec", version = "3.0.3", default-features = false, features = [
 	"derive",
 ] }
 scale-info = { version = "2.1.1", default-features = false, features = ["derive"] }

frame/referenda/src/lib.rs

@@ -118,7 +118,6 @@ pub mod pallet {
 
 	#[pallet::pallet]
 	#[pallet::generate_store(pub(super) trait Store)]
-	#[pallet::without_storage_info]
 	pub struct Pallet<T, I = ()>(_);
 
 	#[pallet::config]
@@ -159,7 +158,8 @@ pub mod pallet {
 			+ Codec
 			+ Eq
 			+ Debug
-			+ TypeInfo;
+			+ TypeInfo
+			+ MaxEncodedLen;
 
 		// Constants
 		/// The minimum amount to be used as a deposit for a public referendum proposal.

frame/support/procedural/src/construct_runtime/expand/origin.rs

@@ -200,7 +200,7 @@ pub fn expand_outer_origin(
 
 		#[derive(
 			Clone, PartialEq, Eq, #scrate::RuntimeDebug, #scrate::codec::Encode,
-			#scrate::codec::Decode, #scrate::scale_info::TypeInfo,
+			#scrate::codec::Decode, #scrate::scale_info::TypeInfo, #scrate::codec::MaxEncodedLen,
 		)]
 		#[allow(non_camel_case_types)]
 		pub enum OriginCaller {

frame/support/src/dispatch.rs

@@ -19,7 +19,9 @@
 //! generating values representing lazy module function calls.
 
 pub use crate::{
-	codec::{Codec, Decode, Encode, EncodeAsRef, EncodeLike, HasCompact, Input, Output},
+	codec::{
+		Codec, Decode, Encode, EncodeAsRef, EncodeLike, HasCompact, Input, MaxEncodedLen, Output,
+	},
 	scale_info::TypeInfo,
 	sp_std::{
 		fmt, marker,
@@ -63,7 +65,7 @@ pub trait Callable<T> {
 pub type CallableCallFor<A, R> = <A as Callable<R>>::Call;
 
 /// Origin for the System pallet.
-#[derive(PartialEq, Eq, Clone, RuntimeDebug, Encode, Decode, TypeInfo)]
+#[derive(PartialEq, Eq, Clone, RuntimeDebug, Encode, Decode, TypeInfo, MaxEncodedLen)]
 pub enum RawOrigin<AccountId> {
 	/// The system itself ordained this dispatch to happen: this is the highest privilege level.
 	Root,
@@ -2698,7 +2700,9 @@ mod tests {
 		}
 	}
 
-	#[derive(TypeInfo, crate::RuntimeDebug, Eq, PartialEq, Clone, Encode, Decode)]
+	#[derive(
+		TypeInfo, crate::RuntimeDebug, Eq, PartialEq, Clone, Encode, Decode, MaxEncodedLen,
+	)]
 	pub struct OuterOrigin;
 
 	impl From<RawOrigin<<TraitImpl as system::Config>::AccountId>> for OuterOrigin {

frame/support/src/traits.rs

@@ -103,5 +103,6 @@ pub use dispatch::{
 
 mod voting;
 pub use voting::{
-	CurrencyToVote, PollStatus, Polling, SaturatingCurrencyToVote, U128CurrencyToVote, VoteTally,
+	ClassCountOf, CurrencyToVote, PollStatus, Polling, SaturatingCurrencyToVote,
+	U128CurrencyToVote, VoteTally,
 };

frame/support/src/traits/dispatch.rs

@@ -18,6 +18,7 @@
 //! Traits for dealing with dispatching calls and the origin from which they are dispatched.
 
 use crate::dispatch::{DispatchResultWithPostInfo, Parameter, RawOrigin};
+use codec::MaxEncodedLen;
 use sp_runtime::{
 	traits::{BadOrigin, Member, Morph, TryMorph},
 	Either,
@@ -258,7 +259,11 @@ pub trait OriginTrait: Sized {
 	type Call;
 
 	/// The caller origin, overarching type of all pallets origins.
-	type PalletsOrigin: Parameter + Member + Into<Self> + From<RawOrigin<Self::AccountId>>;
+	type PalletsOrigin: Parameter
+		+ Member
+		+ Into<Self>
+		+ From<RawOrigin<Self::AccountId>>
+		+ MaxEncodedLen;
 
 	/// The AccountId used across the system.
 	type AccountId;

frame/support/src/traits/schedule.rs

@@ -134,7 +134,7 @@ pub mod v1 {
 	/// A type that can be used as a scheduler.
 	pub trait Anon<BlockNumber, Call, Origin> {
 		/// An address which can be used for removing a scheduled task.
-		type Address: Codec + Clone + Eq + EncodeLike + Debug + TypeInfo;
+		type Address: Codec + Clone + Eq + EncodeLike + Debug + TypeInfo + MaxEncodedLen;
 
 		/// Schedule a dispatch to happen at the beginning of some block in the future.
 		///
@@ -179,7 +179,7 @@ pub mod v1 {
 	/// A type that can be used as a scheduler.
 	pub trait Named<BlockNumber, Call, Origin> {
 		/// An address which can be used for removing a scheduled task.
-		type Address: Codec + Clone + Eq + EncodeLike + sp_std::fmt::Debug;
+		type Address: Codec + Clone + Eq + EncodeLike + sp_std::fmt::Debug + MaxEncodedLen;
 
 		/// Schedule a dispatch to happen at the beginning of some block in the future.
 		///
@@ -289,7 +289,7 @@ pub mod v2 {
 	/// A type that can be used as a scheduler.
 	pub trait Anon<BlockNumber, Call, Origin> {
 		/// An address which can be used for removing a scheduled task.
-		type Address: Codec + Clone + Eq + EncodeLike + Debug + TypeInfo;
+		type Address: Codec + Clone + Eq + EncodeLike + Debug + TypeInfo + MaxEncodedLen;
 		/// A means of expressing a call by the hash of its encoded data.
 		type Hash;
 
@@ -336,7 +336,7 @@ pub mod v2 {
 	/// A type that can be used as a scheduler.
 	pub trait Named<BlockNumber, Call, Origin> {
 		/// An address which can be used for removing a scheduled task.
-		type Address: Codec + Clone + Eq + EncodeLike + sp_std::fmt::Debug;
+		type Address: Codec + Clone + Eq + EncodeLike + sp_std::fmt::Debug + MaxEncodedLen;
 		/// A means of expressing a call by the hash of its encoded data.
 		type Hash;
 

frame/support/src/traits/voting.rs

@@ -122,6 +122,13 @@ impl<Tally, Moment, Class> PollStatus<Tally, Moment, Class> {
 	}
 }
 
+pub struct ClassCountOf<P, T>(sp_std::marker::PhantomData<(P, T)>);
+impl<T, P: Polling<T>> sp_runtime::traits::Get<u32> for ClassCountOf<P, T> {
+	fn get() -> u32 {
+		P::classes().len() as u32
+	}
+}
+
 pub trait Polling<Tally> {
 	type Index: Parameter + Member + Ord + PartialOrd + Copy + HasCompact + MaxEncodedLen;
 	type Votes: Parameter + Member + Ord + PartialOrd + Copy + HasCompact + MaxEncodedLen;

frame/support/test/tests/construct_runtime.rs

@@ -21,6 +21,7 @@
 
 #![recursion_limit = "128"]
 
+use codec::MaxEncodedLen;
 use frame_support::traits::{CrateVersion, PalletInfo as _};
 use scale_info::TypeInfo;
 use sp_core::{sr25519, H256};
@@ -55,7 +56,9 @@ mod module1 {
 		}
 	}
 
-	#[derive(Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo)]
+	#[derive(
+		Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo, MaxEncodedLen,
+	)]
 	pub struct Origin<T, I: Instance = DefaultInstance>(pub core::marker::PhantomData<(T, I)>);
 
 	frame_support::decl_event! {
@@ -97,7 +100,9 @@ mod module2 {
 		}
 	}
 
-	#[derive(Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo)]
+	#[derive(
+		Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo, MaxEncodedLen,
+	)]
 	pub struct Origin;
 
 	frame_support::decl_event! {
@@ -140,7 +145,9 @@ mod nested {
 			}
 		}
 
-		#[derive(Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo)]
+		#[derive(
+			Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo, MaxEncodedLen,
+		)]
 		pub struct Origin;
 
 		frame_support::decl_event! {
@@ -196,7 +203,9 @@ pub mod module3 {
 		}
 	}
 
-	#[derive(Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo)]
+	#[derive(
+		Clone, PartialEq, Eq, Debug, codec::Encode, codec::Decode, TypeInfo, MaxEncodedLen,
+	)]
 	pub struct Origin<T>(pub core::marker::PhantomData<T>);
 
 	frame_support::decl_event! {

frame/support/test/tests/instance.rs

@@ -17,7 +17,7 @@
 
 #![recursion_limit = "128"]
 
-use codec::{Codec, Decode, Encode, EncodeLike};
+use codec::{Codec, Decode, Encode, EncodeLike, MaxEncodedLen};
 use frame_support::{
 	inherent::{InherentData, InherentIdentifier, MakeFatalError, ProvideInherent},
 	metadata::{
@@ -108,7 +108,9 @@ mod module1 {
 		}
 	}
 
-	#[derive(PartialEq, Eq, Clone, sp_runtime::RuntimeDebug, Encode, Decode, TypeInfo)]
+	#[derive(
+		PartialEq, Eq, Clone, sp_runtime::RuntimeDebug, Encode, Decode, TypeInfo, MaxEncodedLen,
+	)]
 	pub enum Origin<T: Config<I>, I>
 	where
 		T::BlockNumber: From<u32>,
@@ -181,7 +183,9 @@ mod module2 {
 		}
 	}
 
-	#[derive(PartialEq, Eq, Clone, sp_runtime::RuntimeDebug, Encode, Decode, TypeInfo)]
+	#[derive(
+		PartialEq, Eq, Clone, sp_runtime::RuntimeDebug, Encode, Decode, TypeInfo, MaxEncodedLen,
+	)]
 	pub enum Origin<T: Config<I>, I = DefaultInstance> {
 		Members(u32),
 		_Phantom(std::marker::PhantomData<(T, I)>),