use super::{client::ClientConfig, wasm_override::WasmOverride, wasm_substitutes::WasmSubstitutes};
use sc_client_api::{
backend, call_executor::CallExecutor, execution_extensions::ExecutionExtensions, HeaderBackend,
};
use sc_executor::{RuntimeVersion, RuntimeVersionOf};
use sp_api::{ExecutionContext, ProofRecorder, StorageTransactionCache};
use sp_core::traits::{CodeExecutor, RuntimeCode, SpawnNamed};
use sp_runtime::{generic::BlockId, traits::Block as BlockT};
use sp_state_machine::{
backend::AsTrieBackend, ExecutionStrategy, Ext, OverlayedChanges, StateMachine, StorageProof,
};
use std::{cell::RefCell, sync::Arc};
pub struct LocalCallExecutor<Block: BlockT, B, E> {
backend: Arc<B>,
executor: E,
wasm_override: Arc<Option<WasmOverride>>,
wasm_substitutes: WasmSubstitutes<Block, E, B>,
spawn_handle: Box<dyn SpawnNamed>,
execution_extensions: Arc<ExecutionExtensions<Block>>,
}
impl<Block: BlockT, B, E> LocalCallExecutor<Block, B, E>
where
E: CodeExecutor + RuntimeVersionOf + Clone + 'static,
B: backend::Backend<Block>,
{
pub fn new(
backend: Arc<B>,
executor: E,
spawn_handle: Box<dyn SpawnNamed>,
client_config: ClientConfig<Block>,
execution_extensions: ExecutionExtensions<Block>,
) -> sp_blockchain::Result<Self> {
let wasm_override = client_config
.wasm_runtime_overrides
.as_ref()
.map(|p| WasmOverride::new(p.clone(), &executor))
.transpose()?;
let wasm_substitutes = WasmSubstitutes::new(
client_config.wasm_runtime_substitutes,
executor.clone(),
backend.clone(),
)?;
Ok(LocalCallExecutor {
backend,
executor,
wasm_override: Arc::new(wasm_override),
spawn_handle,
wasm_substitutes,
execution_extensions: Arc::new(execution_extensions),
})
}
fn check_override<'a>(
&'a self,
onchain_code: RuntimeCode<'a>,
id: &BlockId<Block>,
) -> sp_blockchain::Result<(RuntimeCode<'a>, RuntimeVersion)>
where
Block: BlockT,
B: backend::Backend<Block>,
{
let on_chain_version = self.on_chain_runtime_version(id)?;
let code_and_version = if let Some(d) = self.wasm_override.as_ref().as_ref().and_then(|o| {
o.get(
&on_chain_version.spec_version,
onchain_code.heap_pages,
&on_chain_version.spec_name,
)
}) {
log::debug!(target: "wasm_overrides", "using WASM override for block {}", id);
d
} else if let Some(s) =
self.wasm_substitutes
.get(on_chain_version.spec_version, onchain_code.heap_pages, id)
{
log::debug!(target: "wasm_substitutes", "Using WASM substitute for block {:?}", id);
s
} else {
log::debug!(
target: "wasm_overrides",
"Neither WASM override nor substitute available for block {id}, using onchain code",
);
(onchain_code, on_chain_version)
};
Ok(code_and_version)
}
fn on_chain_runtime_version(
&self,
id: &BlockId<Block>,
) -> sp_blockchain::Result<RuntimeVersion> {
let mut overlay = OverlayedChanges::default();
let at_hash = self.backend.blockchain().expect_block_hash_from_id(id)?;
let state = self.backend.state_at(at_hash)?;
let mut cache = StorageTransactionCache::<Block, B::State>::default();
let mut ext = Ext::new(&mut overlay, &mut cache, &state, None);
let state_runtime_code = sp_state_machine::backend::BackendRuntimeCode::new(&state);
let runtime_code =
state_runtime_code.runtime_code().map_err(sp_blockchain::Error::RuntimeCode)?;
self.executor
.runtime_version(&mut ext, &runtime_code)
.map_err(|e| sp_blockchain::Error::VersionInvalid(e.to_string()))
}
}
impl<Block: BlockT, B, E> Clone for LocalCallExecutor<Block, B, E>
where
E: Clone,
{
fn clone(&self) -> Self {
LocalCallExecutor {
backend: self.backend.clone(),
executor: self.executor.clone(),
wasm_override: self.wasm_override.clone(),
spawn_handle: self.spawn_handle.clone(),
wasm_substitutes: self.wasm_substitutes.clone(),
execution_extensions: self.execution_extensions.clone(),
}
}
}
impl<B, E, Block> CallExecutor<Block> for LocalCallExecutor<Block, B, E>
where
B: backend::Backend<Block>,
E: CodeExecutor + RuntimeVersionOf + Clone + 'static,
Block: BlockT,
{
type Error = E::Error;
type Backend = B;
fn execution_extensions(&self) -> &ExecutionExtensions<Block> {
&self.execution_extensions
}
fn call(
&self,
at: &BlockId<Block>,
method: &str,
call_data: &[u8],
strategy: ExecutionStrategy,
) -> sp_blockchain::Result<Vec<u8>> {
let mut changes = OverlayedChanges::default();
let at_hash = self.backend.blockchain().expect_block_hash_from_id(at)?;
let at_number = self.backend.blockchain().expect_block_number_from_id(at)?;
let state = self.backend.state_at(at_hash)?;
let state_runtime_code = sp_state_machine::backend::BackendRuntimeCode::new(&state);
let runtime_code =
state_runtime_code.runtime_code().map_err(sp_blockchain::Error::RuntimeCode)?;
let runtime_code = self.check_override(runtime_code, at)?.0;
let extensions = self.execution_extensions.extensions(
at_hash,
at_number,
ExecutionContext::OffchainCall(None),
);
let mut sm = StateMachine::new(
&state,
&mut changes,
&self.executor,
method,
call_data,
extensions,
&runtime_code,
self.spawn_handle.clone(),
)
.set_parent_hash(at_hash);
sm.execute_using_consensus_failure_handler(strategy.get_manager())
.map_err(Into::into)
}
fn contextual_call(
&self,
at: &BlockId<Block>,
method: &str,
call_data: &[u8],
changes: &RefCell<OverlayedChanges>,
storage_transaction_cache: Option<&RefCell<StorageTransactionCache<Block, B::State>>>,
recorder: &Option<ProofRecorder<Block>>,
context: ExecutionContext,
) -> Result<Vec<u8>, sp_blockchain::Error> {
let mut storage_transaction_cache = storage_transaction_cache.map(|c| c.borrow_mut());
let at_hash = self.backend.blockchain().expect_block_hash_from_id(at)?;
let at_number = self.backend.blockchain().expect_block_number_from_id(at)?;
let state = self.backend.state_at(at_hash)?;
let (execution_manager, extensions) =
self.execution_extensions.manager_and_extensions(at_hash, at_number, context);
let changes = &mut *changes.borrow_mut();
let state_runtime_code = sp_state_machine::backend::BackendRuntimeCode::new(&state);
let runtime_code =
state_runtime_code.runtime_code().map_err(sp_blockchain::Error::RuntimeCode)?;
let runtime_code = self.check_override(runtime_code, at)?.0;
match recorder {
Some(recorder) => {
let trie_state = state.as_trie_backend();
let backend = sp_state_machine::TrieBackendBuilder::wrap(&trie_state)
.with_recorder(recorder.clone())
.build();
let mut state_machine = StateMachine::new(
&backend,
changes,
&self.executor,
method,
call_data,
extensions,
&runtime_code,
self.spawn_handle.clone(),
)
.with_storage_transaction_cache(storage_transaction_cache.as_deref_mut())
.set_parent_hash(at_hash);
state_machine.execute_using_consensus_failure_handler(execution_manager)
},
None => {
let mut state_machine = StateMachine::new(
&state,
changes,
&self.executor,
method,
call_data,
extensions,
&runtime_code,
self.spawn_handle.clone(),
)
.with_storage_transaction_cache(storage_transaction_cache.as_deref_mut())
.set_parent_hash(at_hash);
state_machine.execute_using_consensus_failure_handler(execution_manager)
},
}
.map_err(Into::into)
}
fn runtime_version(&self, id: &BlockId<Block>) -> sp_blockchain::Result<RuntimeVersion> {
let at_hash = self.backend.blockchain().expect_block_hash_from_id(id)?;
let state = self.backend.state_at(at_hash)?;
let state_runtime_code = sp_state_machine::backend::BackendRuntimeCode::new(&state);
let runtime_code =
state_runtime_code.runtime_code().map_err(sp_blockchain::Error::RuntimeCode)?;
self.check_override(runtime_code, id).map(|(_, v)| v)
}
fn prove_execution(
&self,
at: &BlockId<Block>,
method: &str,
call_data: &[u8],
) -> sp_blockchain::Result<(Vec<u8>, StorageProof)> {
let at_hash = self.backend.blockchain().expect_block_hash_from_id(at)?;
let at_number = self.backend.blockchain().expect_block_number_from_id(at)?;
let state = self.backend.state_at(at_hash)?;
let trie_backend = state.as_trie_backend();
let state_runtime_code = sp_state_machine::backend::BackendRuntimeCode::new(trie_backend);
let runtime_code =
state_runtime_code.runtime_code().map_err(sp_blockchain::Error::RuntimeCode)?;
let runtime_code = self.check_override(runtime_code, at)?.0;
sp_state_machine::prove_execution_on_trie_backend(
trie_backend,
&mut Default::default(),
&self.executor,
self.spawn_handle.clone(),
method,
call_data,
&runtime_code,
self.execution_extensions.extensions(
at_hash,
at_number,
ExecutionContext::OffchainCall(None),
),
)
.map_err(Into::into)
}
}
impl<B, E, Block> RuntimeVersionOf for LocalCallExecutor<Block, B, E>
where
E: RuntimeVersionOf,
Block: BlockT,
{
fn runtime_version(
&self,
ext: &mut dyn sp_externalities::Externalities,
runtime_code: &sp_core::traits::RuntimeCode,
) -> Result<sp_version::RuntimeVersion, sc_executor::error::Error> {
RuntimeVersionOf::runtime_version(&self.executor, ext, runtime_code)
}
}
impl<Block, B, E> sp_version::GetRuntimeVersionAt<Block> for LocalCallExecutor<Block, B, E>
where
B: backend::Backend<Block>,
E: CodeExecutor + RuntimeVersionOf + Clone + 'static,
Block: BlockT,
{
fn runtime_version(&self, at: &BlockId<Block>) -> Result<sp_version::RuntimeVersion, String> {
CallExecutor::runtime_version(self, at).map_err(|e| e.to_string())
}
}
impl<Block, B, E> sp_version::GetNativeVersion for LocalCallExecutor<Block, B, E>
where
B: backend::Backend<Block>,
E: CodeExecutor + sp_version::GetNativeVersion + Clone + 'static,
Block: BlockT,
{
fn native_version(&self) -> &sp_version::NativeVersion {
self.executor.native_version()
}
}
#[cfg(test)]
mod tests {
use super::*;
use sc_client_api::in_mem;
use sc_executor::{NativeElseWasmExecutor, WasmExecutionMethod};
use sp_core::{
testing::TaskExecutor,
traits::{FetchRuntimeCode, WrappedRuntimeCode},
};
use std::collections::HashMap;
use substrate_test_runtime_client::{runtime, GenesisInit, LocalExecutorDispatch};
#[test]
fn should_get_override_if_exists() {
let executor = NativeElseWasmExecutor::<LocalExecutorDispatch>::new(
WasmExecutionMethod::Interpreted,
Some(128),
1,
2,
);
let overrides = crate::client::wasm_override::dummy_overrides();
let onchain_code = WrappedRuntimeCode(substrate_test_runtime::wasm_binary_unwrap().into());
let onchain_code = RuntimeCode {
code_fetcher: &onchain_code,
heap_pages: Some(128),
hash: vec![0, 0, 0, 0],
};
let backend = Arc::new(in_mem::Backend::<runtime::Block>::new());
let client_config = ClientConfig::default();
let genesis_block_builder = crate::GenesisBlockBuilder::new(
&substrate_test_runtime_client::GenesisParameters::default().genesis_storage(),
!client_config.no_genesis,
backend.clone(),
executor.clone(),
)
.expect("Creates genesis block builder");
let _client =
crate::client::new_with_backend::<_, _, runtime::Block, _, runtime::RuntimeApi>(
backend.clone(),
executor.clone(),
genesis_block_builder,
None,
Box::new(TaskExecutor::new()),
None,
None,
client_config,
)
.expect("Creates a client");
let call_executor = LocalCallExecutor {
backend: backend.clone(),
executor: executor.clone(),
wasm_override: Arc::new(Some(overrides)),
spawn_handle: Box::new(TaskExecutor::new()),
wasm_substitutes: WasmSubstitutes::new(
Default::default(),
executor.clone(),
backend.clone(),
)
.unwrap(),
execution_extensions: Arc::new(ExecutionExtensions::new(
Default::default(),
None,
None,
)),
};
let check = call_executor
.check_override(onchain_code, &BlockId::Number(Default::default()))
.expect("RuntimeCode override")
.0;
assert_eq!(Some(vec![2, 2, 2, 2, 2, 2, 2, 2]), check.fetch_runtime_code().map(Into::into));
}
#[test]
fn returns_runtime_version_from_substitute() {
const SUBSTITUTE_SPEC_NAME: &str = "substitute-spec-name-cool";
let executor = NativeElseWasmExecutor::<LocalExecutorDispatch>::new(
WasmExecutionMethod::Interpreted,
Some(128),
1,
2,
);
let backend = Arc::new(in_mem::Backend::<runtime::Block>::new());
let substitute = sp_version::embed::embed_runtime_version(
&substrate_test_runtime::WASM_BINARY_BLOATY.unwrap(),
sp_version::RuntimeVersion {
spec_name: SUBSTITUTE_SPEC_NAME.into(),
..substrate_test_runtime::VERSION
},
)
.unwrap();
let client_config = crate::client::ClientConfig {
wasm_runtime_substitutes: vec![(0, substitute)].into_iter().collect::<HashMap<_, _>>(),
..Default::default()
};
let genesis_block_builder = crate::GenesisBlockBuilder::new(
&substrate_test_runtime_client::GenesisParameters::default().genesis_storage(),
!client_config.no_genesis,
backend.clone(),
executor.clone(),
)
.expect("Creates genesis block builder");
let client =
crate::client::new_with_backend::<_, _, runtime::Block, _, runtime::RuntimeApi>(
backend.clone(),
executor.clone(),
genesis_block_builder,
None,
Box::new(TaskExecutor::new()),
None,
None,
client_config,
)
.expect("Creates a client");
let version = client.runtime_version_at(&BlockId::Number(0)).unwrap();
assert_eq!(SUBSTITUTE_SPEC_NAME, &*version.spec_name);
}
}