Companion for paritytech/substrate#11631

runtime/parachains/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 
 [dependencies]
 bitvec = { version = "1.0.0", default-features = false, features = ["alloc"] }
-parity-scale-codec = { version = "3.1.2", default-features = false, features = ["derive"] }
+parity-scale-codec = { version = "3.1.2", default-features = false, features = ["derive", "max-encoded-len"] }
 log = { version = "0.4.17", default-features = false }
 rustc-hex = { version = "2.1.0", default-features = false }
 scale-info = { version = "2.1.2", default-features = false, features = ["derive"] }

runtime/parachains/src/origin.rs

@@ -54,7 +54,16 @@ pub mod pallet {
 
 	/// Origin for the parachains.
 	#[pallet::origin]
-	#[derive(PartialEq, Eq, Clone, Encode, Decode, sp_core::RuntimeDebug, scale_info::TypeInfo)]
+	#[derive(
+		PartialEq,
+		Eq,
+		Clone,
+		Encode,
+		Decode,
+		sp_core::RuntimeDebug,
+		scale_info::TypeInfo,
+		MaxEncodedLen,
+	)]
 	pub enum Origin {
 		/// It comes from a parachain.
 		Parachain(ParaId),

runtime/westend/src/xcm_config.rs

@@ -38,7 +38,8 @@ use xcm_builder::{
 parameter_types! {
 	pub const WndLocation: MultiLocation = Here.into();
 	pub const Ancestry: MultiLocation = Here.into();
-	pub WestendNetwork: NetworkId = NetworkId::Named(b"Westend".to_vec());
+	pub WestendNetwork: NetworkId =
+		NetworkId::Named(b"Westend".to_vec().try_into().expect("shorter than length limit; qed"));
 	pub CheckAccount: AccountId = XcmPallet::check_account();
 }
 

xcm/Cargo.toml

@@ -7,17 +7,21 @@ edition = "2021"
 
 [dependencies]
 impl-trait-for-tuples = "0.2.2"
-parity-scale-codec = { version = "3.1.2", default-features = false, features = [ "derive" ] }
+parity-scale-codec = { version = "3.1.2", default-features = false, features = ["derive", "max-encoded-len"] }
 scale-info = { version = "2.1.2", default-features = false, features = ["derive"] }
+sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 derivative = {version = "2.2.0", default-features = false, features = [ "use_core" ] }
 log = { version = "0.4.17", default-features = false }
 xcm-procedural = { path = "procedural" }
 
 [features]
 default = ["std"]
 wasm-api = []
-runtime-benchmarks = []
+runtime-benchmarks = [
+	"sp-runtime/runtime-benchmarks",
+]
 std = [
 	"parity-scale-codec/std",
 	"scale-info/std",
+	"sp-runtime/std",
 ]

xcm/pallet-xcm/src/lib.rs

@@ -23,7 +23,7 @@ mod mock;
 #[cfg(test)]
 mod tests;
 
-use codec::{Decode, Encode, EncodeLike};
+use codec::{Decode, Encode, EncodeLike, MaxEncodedLen};
 use frame_support::traits::{Contains, EnsureOrigin, Get, OriginTrait};
 use scale_info::TypeInfo;
 use sp_runtime::{
@@ -212,7 +212,7 @@ pub mod pallet {
 	}
 
 	#[pallet::origin]
-	#[derive(PartialEq, Eq, Clone, Encode, Decode, RuntimeDebug, TypeInfo)]
+	#[derive(PartialEq, Eq, Clone, Encode, Decode, RuntimeDebug, TypeInfo, MaxEncodedLen)]
 	pub enum Origin {
 		/// It comes from somewhere in the XCM space wanting to transact.
 		Xcm(MultiLocation),

xcm/src/v0/junction.rs

@@ -16,30 +16,30 @@
 
 //! Support data structures for `MultiLocation`, primarily the `Junction` datatype.
 
-use alloc::vec::Vec;
-use parity_scale_codec::{Decode, Encode};
+use parity_scale_codec::{Decode, Encode, MaxEncodedLen};
 use scale_info::TypeInfo;
+use sp_runtime::{traits::ConstU32, WeakBoundedVec};
 
 /// A global identifier of an account-bearing consensus system.
-#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo)]
+#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo, MaxEncodedLen)]
 pub enum NetworkId {
 	/// Unidentified/any.
 	Any,
 	/// Some named network.
-	Named(Vec<u8>),
+	Named(WeakBoundedVec<u8, ConstU32<32>>),
 	/// The Polkadot Relay chain
 	Polkadot,
 	/// Kusama.
 	Kusama,
 }
 
 /// An identifier of a pluralistic body.
-#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo)]
+#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo, MaxEncodedLen)]
 pub enum BodyId {
 	/// The only body in its context.
 	Unit,
 	/// A named body.
-	Named(Vec<u8>),
+	Named(WeakBoundedVec<u8, ConstU32<32>>),
 	/// An indexed body.
 	Index(#[codec(compact)] u32),
 	/// The unambiguous executive body (for Polkadot, this would be the Polkadot council).
@@ -55,7 +55,7 @@ pub enum BodyId {
 }
 
 /// A part of a pluralistic body.
-#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo)]
+#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo, MaxEncodedLen)]
 pub enum BodyPart {
 	/// The body's declaration, under whatever means it decides.
 	Voice,
@@ -102,7 +102,7 @@ impl BodyPart {
 /// A single item in a path to describe the relative location of a consensus system.
 ///
 /// Each item assumes a pre-existing location as its context and is defined in terms of it.
-#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo)]
+#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo, MaxEncodedLen)]
 pub enum Junction {
 	/// The consensus system of which the context is a member and state-wise super-set.
 	///
@@ -147,7 +147,7 @@ pub enum Junction {
 	/// Usage will vary widely owing to its generality.
 	///
 	/// NOTE: Try to avoid using this and instead use a more specific item.
-	GeneralKey(Vec<u8>),
+	GeneralKey(WeakBoundedVec<u8, ConstU32<32>>),
 	/// The unambiguous child.
 	///
 	/// Not currently used except as a fallback when deriving ancestry.

xcm/src/v1/junction.rs

@@ -18,14 +18,14 @@
 
 use super::{BodyId, BodyPart, Junctions, MultiLocation, NetworkId};
 use crate::v0::Junction as Junction0;
-use alloc::vec::Vec;
-use parity_scale_codec::{self, Decode, Encode};
+use parity_scale_codec::{Decode, Encode, MaxEncodedLen};
 use scale_info::TypeInfo;
+use sp_runtime::{traits::ConstU32, WeakBoundedVec};
 
 /// A single item in a path to describe the relative location of a consensus system.
 ///
 /// Each item assumes a pre-existing location as its context and is defined in terms of it.
-#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo)]
+#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo, MaxEncodedLen)]
 pub enum Junction {
 	/// An indexed parachain belonging to and operated by the context.
 	///
@@ -65,7 +65,7 @@ pub enum Junction {
 	/// Usage will vary widely owing to its generality.
 	///
 	/// NOTE: Try to avoid using this and instead use a more specific item.
-	GeneralKey(Vec<u8>),
+	GeneralKey(WeakBoundedVec<u8, ConstU32<32>>),
 	/// The unambiguous child.
 	///
 	/// Not currently used except as a fallback when deriving ancestry.

xcm/src/v1/multilocation.rs

@@ -18,7 +18,7 @@
 
 use super::Junction;
 use core::{mem, result};
-use parity_scale_codec::{Decode, Encode};
+use parity_scale_codec::{Decode, Encode, MaxEncodedLen};
 use scale_info::TypeInfo;
 
 /// A relative path between state-bearing consensus systems.
@@ -47,7 +47,7 @@ use scale_info::TypeInfo;
 /// that a value is strictly an interior location, in those cases, `Junctions` may be used.
 ///
 /// The `MultiLocation` value of `Null` simply refers to the interpreting consensus system.
-#[derive(Clone, Decode, Encode, Eq, PartialEq, Ord, PartialOrd, Debug, TypeInfo)]
+#[derive(Clone, Decode, Encode, Eq, PartialEq, Ord, PartialOrd, Debug, TypeInfo, MaxEncodedLen)]
 pub struct MultiLocation {
 	/// The number of parent junctions at the beginning of this `MultiLocation`.
 	pub parents: u8,
@@ -425,7 +425,7 @@ const MAX_JUNCTIONS: usize = 8;
 ///
 /// Parent junctions cannot be constructed with this type. Refer to `MultiLocation` for
 /// instructions on constructing parent junctions.
-#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo)]
+#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, Debug, TypeInfo, MaxEncodedLen)]
 pub enum Junctions {
 	/// The interpreting consensus system.
 	Here,
@@ -1011,6 +1011,7 @@ mod tests {
 	#[test]
 	fn conversion_from_other_types_works() {
 		use crate::v0;
+		use sp_runtime::WeakBoundedVec;
 
 		fn takes_multilocation<Arg: Into<MultiLocation>>(_arg: Arg) {}
 
@@ -1042,10 +1043,13 @@ mod tests {
 			v0::MultiLocation::X3(
 				v0::Junction::Parent,
 				v0::Junction::Parent,
-				v0::Junction::GeneralKey(b"foo".to_vec()),
+				v0::Junction::GeneralKey(b"foo".to_vec().try_into().unwrap()),
 			)
 			.try_into(),
-			Ok(MultiLocation { parents: 2, interior: X1(GeneralKey(b"foo".to_vec())) }),
+			Ok(MultiLocation {
+				parents: 2,
+				interior: X1(GeneralKey(b"foo".to_vec().try_into().unwrap()))
+			}),
 		);
 	}
 }