MEL: Origin, Referenda, ConvictionVoting (#11631)

* Referenda & CV pallets ready

* Fix build

* Add mel_bound for Voting and Casting types

* Add mel_bound on Tally

* Add mel_bound on another Tally

* Add mel_bound for pallet_collective::RawOrigin

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

substrate/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 {

substrate/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,
 };

substrate/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;

substrate/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;
 

substrate/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;