feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

pezkuwi/xcm/xcm-runtime-apis/src/conversions.rs

@@ -0,0 +1,56 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// This file is part of Pezkuwi.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Contains runtime APIs for useful conversions, such as between XCM `Location` and `AccountId`.
+
+use codec::{Decode, Encode};
+use scale_info::TypeInfo;
+use xcm::VersionedLocation;
+use xcm_executor::traits::ConvertLocation;
+
+sp_api::decl_runtime_apis! {
+	/// API for useful conversions between XCM `Location` and `AccountId`.
+	pub trait LocationToAccountApi<AccountId> where AccountId: Decode {
+		/// Converts `Location` to `AccountId`.
+		fn convert_location(location: VersionedLocation) -> Result<AccountId, Error>;
+	}
+}
+
+#[derive(Copy, Clone, Encode, Decode, Eq, PartialEq, Debug, TypeInfo)]
+pub enum Error {
+	/// Requested `Location` is not supported by the local conversion.
+	#[codec(index = 0)]
+	Unsupported,
+
+	/// Converting a versioned data structure from one version to another failed.
+	#[codec(index = 1)]
+	VersionedConversionFailed,
+}
+
+/// A helper implementation that can be used for `LocationToAccountApi` implementations.
+/// It is useful when you already have a `ConvertLocation<AccountId>` implementation and a default
+/// `Ss58Prefix`.
+pub struct LocationToAccountHelper<AccountId, Conversion>(
+	core::marker::PhantomData<(AccountId, Conversion)>,
+);
+impl<AccountId: Decode, Conversion: ConvertLocation<AccountId>>
+	LocationToAccountHelper<AccountId, Conversion>
+{
+	pub fn convert_location(location: VersionedLocation) -> Result<AccountId, Error> {
+		let location = location.try_into().map_err(|_| Error::VersionedConversionFailed)?;
+		Conversion::convert_location(&location).ok_or(Error::Unsupported)
+	}
+}