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//! State root task related functionality. | ||
use reth_provider::providers::ConsistentDbView; | ||
use reth_trie::{updates::TrieUpdates, TrieInput}; | ||
use reth_trie_parallel::parallel_root::ParallelStateRootError; | ||
use revm_primitives::{EvmState, B256}; | ||
use std::{ | ||
future::Future, | ||
pin::Pin, | ||
sync::Arc, | ||
task::{Context, Poll}, | ||
}; | ||
use tokio_stream::wrappers::UnboundedReceiverStream; | ||
|
||
/// Standalone task that receives a transaction state stream and updates relevant | ||
/// data structures to calculate state root. | ||
/// | ||
/// It is responsile of initializing a blinded sparse trie and subscribe to | ||
/// transaction state stream. As it receives transaction execution results, it | ||
/// fetches the proofs for relevant accounts from the database and reveal them | ||
/// to the tree. | ||
/// Then it updates relevant leaves according to the result of the transaction. | ||
#[allow(dead_code)] | ||
pub(crate) struct StateRootTask<Factory> { | ||
/// View over the state in the database. | ||
consistent_view: ConsistentDbView<Factory>, | ||
/// Incoming state updates. | ||
state_stream: UnboundedReceiverStream<EvmState>, | ||
/// Latest trie input. | ||
input: Arc<TrieInput>, | ||
} | ||
|
||
#[allow(dead_code)] | ||
impl<Factory> StateRootTask<Factory> { | ||
/// Creates a new `StateRootTask`. | ||
pub(crate) const fn new( | ||
consistent_view: ConsistentDbView<Factory>, | ||
input: Arc<TrieInput>, | ||
state_stream: UnboundedReceiverStream<EvmState>, | ||
) -> Self { | ||
Self { consistent_view, state_stream, input } | ||
} | ||
|
||
/// Handles state updates. | ||
pub(crate) fn on_state_update(&self, _update: EvmState) { | ||
// TODO: calculate hashed state update and dispatch proof gathering for it. | ||
} | ||
} | ||
|
||
impl<Factory> Future for StateRootTask<Factory> { | ||
type Output = Result<(B256, TrieUpdates), ParallelStateRootError>; | ||
|
||
fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Self::Output> { | ||
// TODO: | ||
// * poll incoming state updates stream | ||
// * keep track of proof calculation | ||
// * keep track of intermediate root computation | ||
Poll::Pending | ||
} | ||
} |
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