reth_provider/providers/state/
latest.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
use crate::{
    providers::state::macros::delegate_provider_impls, AccountReader, BlockHashReader,
    StateProvider, StateRootProvider,
};
use alloy_primitives::{
    map::{HashMap, HashSet},
    Address, BlockNumber, Bytes, StorageKey, StorageValue, B256,
};
use reth_db::tables;
use reth_db_api::{cursor::DbDupCursorRO, transaction::DbTx};
use reth_primitives::{Account, Bytecode};
use reth_storage_api::{DBProvider, StateProofProvider, StorageRootProvider};
use reth_storage_errors::provider::{ProviderError, ProviderResult};
use reth_trie::{
    proof::{Proof, StorageProof},
    updates::TrieUpdates,
    witness::TrieWitness,
    AccountProof, HashedPostState, HashedStorage, MultiProof, StateRoot, StorageRoot, TrieInput,
};
use reth_trie_db::{
    DatabaseProof, DatabaseStateRoot, DatabaseStorageProof, DatabaseStorageRoot,
    DatabaseTrieWitness,
};

/// State provider over latest state that takes tx reference.
///
/// Wraps a [`DBProvider`] to get access to database.
#[derive(Debug)]
pub struct LatestStateProviderRef<'b, Provider>(&'b Provider);

impl<'b, Provider: DBProvider> LatestStateProviderRef<'b, Provider> {
    /// Create new state provider
    pub const fn new(provider: &'b Provider) -> Self {
        Self(provider)
    }

    fn tx(&self) -> &Provider::Tx {
        self.0.tx_ref()
    }
}

impl<Provider: DBProvider> AccountReader for LatestStateProviderRef<'_, Provider> {
    /// Get basic account information.
    fn basic_account(&self, address: Address) -> ProviderResult<Option<Account>> {
        self.tx().get::<tables::PlainAccountState>(address).map_err(Into::into)
    }
}

impl<Provider: BlockHashReader> BlockHashReader for LatestStateProviderRef<'_, Provider> {
    /// Get block hash by number.
    fn block_hash(&self, number: u64) -> ProviderResult<Option<B256>> {
        self.0.block_hash(number)
    }

    fn canonical_hashes_range(
        &self,
        start: BlockNumber,
        end: BlockNumber,
    ) -> ProviderResult<Vec<B256>> {
        self.0.canonical_hashes_range(start, end)
    }
}

impl<Provider: DBProvider> StateRootProvider for LatestStateProviderRef<'_, Provider> {
    fn state_root(&self, hashed_state: HashedPostState) -> ProviderResult<B256> {
        StateRoot::overlay_root(self.tx(), hashed_state)
            .map_err(|err| ProviderError::Database(err.into()))
    }

    fn state_root_from_nodes(&self, input: TrieInput) -> ProviderResult<B256> {
        StateRoot::overlay_root_from_nodes(self.tx(), input)
            .map_err(|err| ProviderError::Database(err.into()))
    }

    fn state_root_with_updates(
        &self,
        hashed_state: HashedPostState,
    ) -> ProviderResult<(B256, TrieUpdates)> {
        StateRoot::overlay_root_with_updates(self.tx(), hashed_state)
            .map_err(|err| ProviderError::Database(err.into()))
    }

    fn state_root_from_nodes_with_updates(
        &self,
        input: TrieInput,
    ) -> ProviderResult<(B256, TrieUpdates)> {
        StateRoot::overlay_root_from_nodes_with_updates(self.tx(), input)
            .map_err(|err| ProviderError::Database(err.into()))
    }
}

impl<Provider: DBProvider> StorageRootProvider for LatestStateProviderRef<'_, Provider> {
    fn storage_root(
        &self,
        address: Address,
        hashed_storage: HashedStorage,
    ) -> ProviderResult<B256> {
        StorageRoot::overlay_root(self.tx(), address, hashed_storage)
            .map_err(|err| ProviderError::Database(err.into()))
    }

    fn storage_proof(
        &self,
        address: Address,
        slot: B256,
        hashed_storage: HashedStorage,
    ) -> ProviderResult<reth_trie::StorageProof> {
        StorageProof::overlay_storage_proof(self.tx(), address, slot, hashed_storage)
            .map_err(Into::<ProviderError>::into)
    }
}

impl<Provider: DBProvider> StateProofProvider for LatestStateProviderRef<'_, Provider> {
    fn proof(
        &self,
        input: TrieInput,
        address: Address,
        slots: &[B256],
    ) -> ProviderResult<AccountProof> {
        Proof::overlay_account_proof(self.tx(), input, address, slots)
            .map_err(Into::<ProviderError>::into)
    }

    fn multiproof(
        &self,
        input: TrieInput,
        targets: HashMap<B256, HashSet<B256>>,
    ) -> ProviderResult<MultiProof> {
        Proof::overlay_multiproof(self.tx(), input, targets).map_err(Into::<ProviderError>::into)
    }

    fn witness(
        &self,
        input: TrieInput,
        target: HashedPostState,
    ) -> ProviderResult<HashMap<B256, Bytes>> {
        TrieWitness::overlay_witness(self.tx(), input, target).map_err(Into::<ProviderError>::into)
    }
}

impl<Provider: DBProvider + BlockHashReader> StateProvider
    for LatestStateProviderRef<'_, Provider>
{
    /// Get storage.
    fn storage(
        &self,
        account: Address,
        storage_key: StorageKey,
    ) -> ProviderResult<Option<StorageValue>> {
        let mut cursor = self.tx().cursor_dup_read::<tables::PlainStorageState>()?;
        if let Some(entry) = cursor.seek_by_key_subkey(account, storage_key)? {
            if entry.key == storage_key {
                return Ok(Some(entry.value))
            }
        }
        Ok(None)
    }

    /// Get account code by its hash
    fn bytecode_by_hash(&self, code_hash: B256) -> ProviderResult<Option<Bytecode>> {
        self.tx().get::<tables::Bytecodes>(code_hash).map_err(Into::into)
    }
}

/// State provider for the latest state.
#[derive(Debug)]
pub struct LatestStateProvider<Provider>(Provider);

impl<Provider: DBProvider> LatestStateProvider<Provider> {
    /// Create new state provider
    pub const fn new(db: Provider) -> Self {
        Self(db)
    }

    /// Returns a new provider that takes the `TX` as reference
    #[inline(always)]
    const fn as_ref(&self) -> LatestStateProviderRef<'_, Provider> {
        LatestStateProviderRef::new(&self.0)
    }
}

// Delegates all provider impls to [LatestStateProviderRef]
delegate_provider_impls!(LatestStateProvider<Provider> where [Provider: DBProvider + BlockHashReader]);

#[cfg(test)]
mod tests {
    use super::*;

    const fn assert_state_provider<T: StateProvider>() {}
    #[allow(dead_code)]
    const fn assert_latest_state_provider<T: DBProvider + BlockHashReader>() {
        assert_state_provider::<LatestStateProvider<T>>();
    }
}