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