mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-14 11:01:08 +00:00
Gav Wood
a670208a33
* Introduce first groundwork for Wasm executor. * Remove old Rust-runtime code. * Avoid commiting compled files. * Add runtime precompile. * Rename so module makes more sense. * Further renaming. * Ensure tests work. * Allow bringing in of externalities. - Add util functions/macros. - Add uncompacted runtime. - Add some external crates from pwasm-std for managing allocs/memory stuff. * Nice macros for imports. * Allow passing in of data through allocators. Make memcpy and malloc work. Basic allocator. * Can now pass in bytes to WasmExecutor. * Additional cleanup. * Switch usages of `OutData` to `u64` No need to be able to return bytes anymore. * convert to safe but extremely verbose type conversion. @rphmeier any more concise way of doing this? * Remove StaticExternalities distinction. * Remove another unused use. * Refactor wasm utils out * Remove extraneous copies that weren't really testing anything. * Try to use wasm 0.15 * Make it work! * Call-time externalities working. * Add basic externalities. * Fix grumbles and note unwraps to be sorted. * Test storage externality. Unforunately had to change signatures of externalities to avoid immutable function returning a reference. Not sure what to do about this... * Fix nits. * Compile collation logic. * Move back to refs. Yey. * Remove "object" id for storage access. * Fix test. * Fix up rest of tests. * remove unwrap. * Expose set/get code in externalities Also improve tests and add nice wrappers in rust-wasm. * Add validator set. * Introduce validator set into externalities and test. * Add another external function. * Remove code and validators; use storage for everything. * Introduce validators function. * Tests (and a fix) for the validators getter. * Allow calls into runtime to return data. * Remove unneeded trace. * Make runtime printing a bit nicer. * Create separate runtimes for testing and polkadot. * Remove commented code. * Use new path. * Refactor into shared support module. * Fix warning. * Remove unwraps. * Make macro a little less unhygenic. * Add wasm files.
93 lines
2.4 KiB
Rust
93 lines
2.4 KiB
Rust
// Copyright 2017 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot 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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// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! State machine backends. These manage the code and storage of contracts.
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use std::{error, fmt};
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use primitives::hash::H256;
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use triehash::sec_trie_root;
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use super::{Update, MemoryState};
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/// Output of a commit.
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pub struct Committed {
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/// Root of the storage tree after changes committed.
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pub storage_tree_root: H256,
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}
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/// A state backend is used to read state data and can have changes committed
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/// to it.
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pub trait Backend {
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/// An error type when fetching data is not possible.
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type Error: super::Error;
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/// Get keyed storage associated with specific address.
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fn storage(&self, key: &[u8]) -> Result<&[u8], Self::Error>;
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/// Commit updates to the backend and get new state.
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fn commit<I>(&mut self, changes: I) -> Committed
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where I: IntoIterator<Item=Update>;
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}
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/// Error impossible.
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// TODO: use `!` type when stabilized.
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#[derive(Debug)]
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pub enum Void {}
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impl fmt::Display for Void {
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fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
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match *self {}
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}
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}
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impl error::Error for Void {
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fn description(&self) -> &str { "unreachable error" }
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}
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/// In-memory backend. Fully recomputes tries on each commit but useful for
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/// tests.
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#[derive(Default)]
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pub struct InMemory {
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inner: MemoryState, // keeps all the state in memory.
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}
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impl Backend for InMemory {
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type Error = Void;
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fn storage(&self, key: &[u8]) -> Result<&[u8], Void> {
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Ok(self.inner.storage(key).unwrap_or(&[]))
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}
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fn commit<I>(&mut self, changes: I) -> Committed
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where I: IntoIterator<Item=Update>
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{
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self.inner.update(changes);
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// fully recalculate trie roots.
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let storage_tree_root = H256(sec_trie_root(
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self.inner.storage.iter()
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.map(|(k, v)| (k.to_vec(), v.clone()))
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.collect()
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).0);
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Committed {
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storage_tree_root,
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}
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}
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}
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// TODO: DB-based backend
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