1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

// Copyright 2021 ChainSafe Systems
// SPDX-License-Identifier: LGPL-3.0-only

//! Xcm support for dispatching `pallet_utility` pallet calls

use codec::{Decode, Encode, Output};
use frame_support::{sp_std::vec::Vec, RuntimeDebug};

use crate::{CallEncoder, PalletCall, PalletCallEncoder};

/// The index of `pallet_utility` in the polkadot runtime
pub const POLKADOT_PALLET_UTILITY_INDEX: u8 = 26u8;

/// The index of `pallet_utility` in the polkadot runtime
pub const KUSAMA_PALLET_UTILITY_INDEX: u8 = 24u8;

pub trait UtilityCallEncoder: PalletCallEncoder {}

impl<'a, 'b, Config> Encode for CallEncoder<'a, 'b, UtilityCall, Config>
where
	Config: UtilityCallEncoder,
{
	fn encode_to<T: Output + ?Sized>(&self, dest: &mut T) {
		// include the pallet identifier
		dest.push_byte(self.call.pallet_call_index());
		self.call.encode_to(dest)
	}
}

/// Represents dispatchable calls of the FRAME `pallet_utility` pallet.
///
/// This is a generic version of the `pallet_utility::Call` enum generated by the substrate pallet
/// macros
#[derive(Encode, Decode, RuntimeDebug, scale_info::TypeInfo)]
pub enum UtilityCall {
	#[codec(index = 1)]
	AsDerivative(u16, Vec<u8>),
	#[codec(index = 2)]
	BatchAll(Vec<Vec<u8>>),
}

impl PalletCall for UtilityCall {
	/// the indices of the corresponding calls within the `pallet_utility`
	fn pallet_call_index(&self) -> u8 {
		match self {
			UtilityCall::AsDerivative(_, _) => 1,
			UtilityCall::BatchAll(_) => 2,
		}
	}
}