reth_trie/hashed_cursor/
noop.rs

1use super::{HashedCursor, HashedCursorFactory, HashedStorageCursor};
2use alloy_primitives::{B256, U256};
3use reth_primitives_traits::Account;
4use reth_storage_errors::db::DatabaseError;
5
6/// Noop hashed cursor factory.
7#[derive(Clone, Default, Debug)]
8#[non_exhaustive]
9pub struct NoopHashedCursorFactory;
10
11impl HashedCursorFactory for NoopHashedCursorFactory {
12    type AccountCursor<'a>
13        = NoopHashedAccountCursor
14    where
15        Self: 'a;
16    type StorageCursor<'a>
17        = NoopHashedStorageCursor
18    where
19        Self: 'a;
20
21    fn hashed_account_cursor(&self) -> Result<Self::AccountCursor<'_>, DatabaseError> {
22        Ok(NoopHashedAccountCursor::default())
23    }
24
25    fn hashed_storage_cursor(
26        &self,
27        _hashed_address: B256,
28    ) -> Result<Self::StorageCursor<'_>, DatabaseError> {
29        Ok(NoopHashedStorageCursor::default())
30    }
31}
32
33/// Noop account hashed cursor.
34#[derive(Default, Debug)]
35#[non_exhaustive]
36pub struct NoopHashedAccountCursor;
37
38impl HashedCursor for NoopHashedAccountCursor {
39    type Value = Account;
40
41    fn seek(&mut self, _key: B256) -> Result<Option<(B256, Self::Value)>, DatabaseError> {
42        Ok(None)
43    }
44
45    fn next(&mut self) -> Result<Option<(B256, Self::Value)>, DatabaseError> {
46        Ok(None)
47    }
48}
49
50/// Noop account hashed cursor.
51#[derive(Default, Debug)]
52#[non_exhaustive]
53pub struct NoopHashedStorageCursor;
54
55impl HashedCursor for NoopHashedStorageCursor {
56    type Value = U256;
57
58    fn seek(&mut self, _key: B256) -> Result<Option<(B256, Self::Value)>, DatabaseError> {
59        Ok(None)
60    }
61
62    fn next(&mut self) -> Result<Option<(B256, Self::Value)>, DatabaseError> {
63        Ok(None)
64    }
65}
66
67impl HashedStorageCursor for NoopHashedStorageCursor {
68    fn is_storage_empty(&mut self) -> Result<bool, DatabaseError> {
69        Ok(true)
70    }
71}
reth_trie/hashed_cursor/noop.rs

reth_trie/hashed_cursor/
noop.rs
