Generate storage info for treasury pallet (#9368)

substrate/frame/treasury/Cargo.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
+codec = { package = "parity-scale-codec", version = "2.2.0", default-features = false, features = ["derive", "max-encoded-len"] }
 serde = { version = "1.0.126", features = ["derive"], optional = true }
 impl-trait-for-tuples = "0.2.1"
 

substrate/frame/treasury/src/lib.rs

@@ -62,7 +62,7 @@ mod tests;
 mod benchmarking;
 pub mod weights;
 
-use codec::{Encode, Decode};
+use codec::{Encode, Decode, MaxEncodedLen};
 
 use sp_std::prelude::*;
 use sp_runtime::{
@@ -116,7 +116,7 @@ pub type ProposalIndex = u32;
 
 /// A spending proposal.
 #[cfg_attr(feature = "std", derive(serde::Serialize, serde::Deserialize))]
-#[derive(Encode, Decode, Clone, PartialEq, Eq, RuntimeDebug)]
+#[derive(Encode, Decode, Clone, PartialEq, Eq, MaxEncodedLen, RuntimeDebug)]
 pub struct Proposal<AccountId, Balance> {
 	/// The account proposing it.
 	proposer: AccountId,
@@ -136,6 +136,7 @@ pub mod pallet {
 
 	#[pallet::pallet]
 	#[pallet::generate_store(pub(super) trait Store)]
+	#[pallet::generate_storage_info]
 	pub struct Pallet<T, I = ()>(PhantomData<(T, I)>);
 
 	#[pallet::config]