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
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154

// This file is part of Substrate.

// Copyright (C) 2019-2021 Parity Technologies (UK) Ltd.
// 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.

//! Types that should only be used for testing!

use crate::crypto::KeyTypeId;

/// Key type for generic Ed25519 key.
pub const ED25519: KeyTypeId = KeyTypeId(*b"ed25");
/// Key type for generic Sr 25519 key.
pub const SR25519: KeyTypeId = KeyTypeId(*b"sr25");
/// Key type for generic Sr 25519 key.
pub const ECDSA: KeyTypeId = KeyTypeId(*b"ecds");

/// Macro for exporting functions from wasm in with the expected signature for using it with the
/// wasm executor. This is useful for tests where you need to call a function in wasm.
///
/// The input parameters are expected to be SCALE encoded and will be automatically decoded for you.
/// The output value is also SCALE encoded when returned back to the host.
///
/// The functions are feature-gated with `#[cfg(not(feature = "std"))]`, so they are only available
/// from within wasm.
///
/// # Example
///
/// ```
/// # use sp_core::wasm_export_functions;
///
/// wasm_export_functions! {
///     fn test_in_wasm(value: bool, another_value: Vec<u8>) -> bool {
///         value && another_value.is_empty()
///     }
///
///     fn without_return_value() {
///         // do something
///     }
/// }
/// ```
#[macro_export]
macro_rules! wasm_export_functions {
	(
		$(
			fn $name:ident (
				$( $arg_name:ident: $arg_ty:ty ),* $(,)?
			) $( -> $ret_ty:ty )? { $( $fn_impl:tt )* }
		)*
	) => {
		$(
			$crate::wasm_export_functions! {
				@IMPL
				fn $name (
					$( $arg_name: $arg_ty ),*
				) $( -> $ret_ty )? { $( $fn_impl )* }
			}
		)*
	};
	(@IMPL
		fn $name:ident (
				$( $arg_name:ident: $arg_ty:ty ),*
		) { $( $fn_impl:tt )* }
	) => {
		#[no_mangle]
		#[allow(unreachable_code)]
		#[cfg(not(feature = "std"))]
		pub fn $name(input_data: *mut u8, input_len: usize) -> u64 {
			let input: &[u8] = if input_len == 0 {
				&[0u8; 0]
			} else {
				unsafe {
					$crate::sp_std::slice::from_raw_parts(input_data, input_len)
				}
			};

			{
				let ($( $arg_name ),*) : ($( $arg_ty ),*) = $crate::Decode::decode(
					&mut &input[..],
				).expect("Input data is correctly encoded");

				$( $fn_impl )*
			}

			$crate::to_substrate_wasm_fn_return_value(&())
		}
	};
	(@IMPL
		fn $name:ident (
				$( $arg_name:ident: $arg_ty:ty ),*
		) $( -> $ret_ty:ty )? { $( $fn_impl:tt )* }
	) => {
		#[no_mangle]
		#[allow(unreachable_code)]
		#[cfg(not(feature = "std"))]
		pub fn $name(input_data: *mut u8, input_len: usize) -> u64 {
			let input: &[u8] = if input_len == 0 {
				&[0u8; 0]
			} else {
				unsafe {
					$crate::sp_std::slice::from_raw_parts(input_data, input_len)
				}
			};

			let output $( : $ret_ty )? = {
				let ($( $arg_name ),*) : ($( $arg_ty ),*) = $crate::Decode::decode(
					&mut &input[..],
				).expect("Input data is correctly encoded");

				$( $fn_impl )*
			};

			$crate::to_substrate_wasm_fn_return_value(&output)
		}
	};
}

/// A task executor that can be used in tests.
///
/// Internally this just wraps a `ThreadPool` with a pool size of `8`. This
/// should ensure that we have enough threads in tests for spawning blocking futures.
#[cfg(feature = "std")]
#[derive(Clone)]
pub struct TaskExecutor(futures::executor::ThreadPool);

#[cfg(feature = "std")]
impl TaskExecutor {
	/// Create a new instance of `Self`.
	pub fn new() -> Self {
		let mut builder = futures::executor::ThreadPoolBuilder::new();
		Self(builder.pool_size(8).create().expect("Failed to create thread pool"))
	}
}

#[cfg(feature = "std")]
impl crate::traits::SpawnNamed for TaskExecutor {
	fn spawn_blocking(&self, _: &'static str, future: futures::future::BoxFuture<'static, ()>) {
		self.0.spawn_ok(future);
	}
	fn spawn(&self, _: &'static str, future: futures::future::BoxFuture<'static, ()>) {
		self.0.spawn_ok(future);
	}
}