mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-09 15:17:25 +00:00
Jegor Sidorenko
68 lines
2.2 KiB
Rust
68 lines
2.2 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) Parity Technologies (UK) Ltd.
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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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//! Various pieces of common functionality.
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use crate::*;
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use frame_support::pallet_prelude::*;
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impl<T: Config<I>, I: 'static> Pallet<T, I> {
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/// Get the owner of the item, if the item exists.
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pub fn owner(collection: T::CollectionId, item: T::ItemId) -> Option<T::AccountId> {
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Item::<T, I>::get(collection, item).map(|i| i.owner)
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}
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/// Get the owner of the collection, if the collection exists.
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pub fn collection_owner(collection: T::CollectionId) -> Option<T::AccountId> {
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Collection::<T, I>::get(collection).map(|i| i.owner)
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}
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/// Validate the `data` was signed by `signer` and the `signature` is correct.
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pub fn validate_signature(
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data: &Vec<u8>,
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signature: &T::OffchainSignature,
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signer: &T::AccountId,
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) -> DispatchResult {
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if signature.verify(&**data, &signer) {
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return Ok(())
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}
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// NOTE: for security reasons modern UIs implicitly wrap the data requested to sign into
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// <Bytes></Bytes>, that's why we support both wrapped and raw versions.
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let prefix = b"<Bytes>";
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let suffix = b"</Bytes>";
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let mut wrapped: Vec<u8> = Vec::with_capacity(data.len() + prefix.len() + suffix.len());
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wrapped.extend(prefix);
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wrapped.extend(data);
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wrapped.extend(suffix);
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ensure!(signature.verify(&*wrapped, &signer), Error::<T, I>::WrongSignature);
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Ok(())
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}
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#[cfg(any(test, feature = "runtime-benchmarks"))]
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pub fn set_next_id(id: T::CollectionId) {
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NextCollectionId::<T, I>::set(Some(id));
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}
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#[cfg(test)]
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pub fn get_next_id() -> T::CollectionId {
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NextCollectionId::<T, I>::get().unwrap_or(T::CollectionId::initial_value())
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}
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}
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