mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Bastian Köcher
56 lines
2.0 KiB
Rust
56 lines
2.0 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2020-2022 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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/// ! For instruction benchmarking we do no instantiate a full contract but merely the
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/// ! sandbox to execute the wasm code. This is because we do not need the full
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/// ! environment that provides the seal interface as imported functions.
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use super::{code::WasmModule, Config};
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use sp_core::crypto::UncheckedFrom;
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use sp_sandbox::{
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default_executor::{EnvironmentDefinitionBuilder, Instance, Memory},
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SandboxEnvironmentBuilder, SandboxInstance,
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};
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/// Minimal execution environment without any exported functions.
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pub struct Sandbox {
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instance: Instance<()>,
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_memory: Option<Memory>,
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}
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impl Sandbox {
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/// Invoke the `call` function of a contract code and panic on any execution error.
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pub fn invoke(&mut self) {
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self.instance.invoke("call", &[], &mut ()).unwrap();
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}
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}
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impl<T: Config> From<&WasmModule<T>> for Sandbox
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where
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T: Config,
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T::AccountId: UncheckedFrom<T::Hash> + AsRef<[u8]>,
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{
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/// Creates an instance from the supplied module and supplies as much memory
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/// to the instance as the module declares as imported.
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fn from(module: &WasmModule<T>) -> Self {
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let mut env_builder = EnvironmentDefinitionBuilder::new();
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let memory = module.add_memory(&mut env_builder);
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let instance = Instance::new(&module.code, &env_builder, &mut ())
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.expect("Failed to create benchmarking Sandbox instance");
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Self { instance, _memory: memory }
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}
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}
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