git.delta.rocks / unique-network / refs/commits / e8fdadb89923

1// This file is part of Substrate.23// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.4// SPDX-License-Identifier: Apache-2.056// 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 at9//10// 	http://www.apache.org/licenses/LICENSE-2.011//12// Unless required by applicable law or agreed to in writing, software13// 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 and16// limitations under the License.1718///! For instruction benchmarking we do no instantiate a full contract but merely the19///! sandbox to execute the wasm code. This is because we do not need the full20///! environment that provides the seal interface as imported functions.21use super::{Config, code::WasmModule};22use sp_core::crypto::UncheckedFrom;23use sp_sandbox::{EnvironmentDefinitionBuilder, Instance, Memory};2425/// Minimal execution environment without any exported functions.26pub struct Sandbox {27	instance: Instance<()>,28	_memory: Option<Memory>,29}3031impl Sandbox {32	/// Invoke the `call` function of a contract code and panic on any execution error.33	pub fn invoke(&mut self) {34		self.instance.invoke("call", &[], &mut ()).unwrap();35	}36}3738impl<T: Config> From<&WasmModule<T>> for Sandbox39where40	T: Config,41	T::AccountId: UncheckedFrom<T::Hash> + AsRef<[u8]>,42{43	/// Creates an instance from the supplied module and supplies as much memory44	/// to the instance as the module declares as imported.45	fn from(module: &WasmModule<T>) -> Self {46		let mut env_builder = EnvironmentDefinitionBuilder::new();47		let memory = module.add_memory(&mut env_builder);48		let instance = Instance::new(&module.code, &env_builder, &mut ())49			.expect("Failed to create benchmarking Sandbox instance");50		Self {51			instance,52			_memory: memory,53		}54	}55}