mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-29 20:47:56 +00:00
Shawn Tabrizi
40 lines
1.6 KiB
Rust
40 lines
1.6 KiB
Rust
// Copyright 2019-2020 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Substrate is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Substrate. If not, see <http://www.gnu.org/licenses/>.
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//! Definitions for a wasm runtime.
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use crate::error::Error;
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use sp_core::traits::Externalities;
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use sp_wasm_interface::Function;
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/// A trait that defines an abstract wasm runtime.
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///
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/// This can be implemented by an execution engine.
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pub trait WasmRuntime {
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/// Attempt to update the number of heap pages available during execution.
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///
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/// Returns false if the update cannot be applied. The function is guaranteed to return true if
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/// the heap pages would not change from its current value.
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fn update_heap_pages(&mut self, heap_pages: u64) -> bool;
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/// Return the host functions that are registered for this Wasm runtime.
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fn host_functions(&self) -> &[&'static dyn Function];
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/// Call a method in the Substrate runtime by name. Returns the encoded result on success.
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fn call(&mut self, ext: &mut dyn Externalities, method: &str, data: &[u8])
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-> Result<Vec<u8>, Error>;
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}
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