1
// This file is part of Substrate.
2

            
3
// Copyright (C) Parity Technologies (UK) Ltd.
4
// SPDX-License-Identifier: Apache-2.0
5

            
6
// Licensed under the Apache License, Version 2.0 (the "License");
7
// you may not use this file except in compliance with the License.
8
// You may obtain a copy of the License at
9
//
10
// 	http://www.apache.org/licenses/LICENSE-2.0
11
//
12
// Unless required by applicable law or agreed to in writing, software
13
// distributed under the License is distributed on an "AS IS" BASIS,
14
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15
// See the License for the specific language governing permissions and
16
// limitations under the License.
17

            
18
//! The Offchain Worker runtime api primitives.
19

            
20
#![cfg_attr(not(feature = "std"), no_std)]
21
#![warn(missing_docs)]
22

            
23
/// Re-export of parent module scope storage prefix.
24
pub use sp_core::offchain::STORAGE_PREFIX;
25

            
26
sp_api::decl_runtime_apis! {
27
	/// The offchain worker api.
28
	#[api_version(2)]
29
	pub trait OffchainWorkerApi {
30
		/// Starts the off-chain task for given block number.
31
		#[changed_in(2)]
32
		fn offchain_worker(number: sp_runtime::traits::NumberFor<Block>);
33

            
34
		/// Starts the off-chain task for given block header.
35
		fn offchain_worker(header: &Block::Header);
36
	}
37
}