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use crate::{
change_set::ChangeSet, event_store::EventStore, ledger_store::LedgerStore,
schema::transaction_accumulator::TransactionAccumulatorSchema, state_store::StateStore,
transaction_store::TransactionStore, DiemDB,
};
use anyhow::{ensure, Result};
use diem_crypto::{hash::SPARSE_MERKLE_PLACEHOLDER_HASH, HashValue};
use diem_jellyfish_merkle::restore::JellyfishMerkleRestore;
use diem_types::{
account_state_blob::AccountStateBlob,
contract_event::ContractEvent,
ledger_info::LedgerInfoWithSignatures,
proof::{definition::LeafCount, position::FrozenSubTreeIterator},
transaction::{Transaction, TransactionInfo, Version, PRE_GENESIS_VERSION},
};
use schemadb::DB;
use std::sync::Arc;
use storage_interface::{DbReader, TreeState};
#[derive(Clone)]
pub struct RestoreHandler {
db: Arc<DB>,
pub diemdb: Arc<DiemDB>,
ledger_store: Arc<LedgerStore>,
transaction_store: Arc<TransactionStore>,
state_store: Arc<StateStore>,
event_store: Arc<EventStore>,
}
impl RestoreHandler {
pub(crate) fn new(
db: Arc<DB>,
diemdb: Arc<DiemDB>,
ledger_store: Arc<LedgerStore>,
transaction_store: Arc<TransactionStore>,
state_store: Arc<StateStore>,
event_store: Arc<EventStore>,
) -> Self {
Self {
db,
diemdb,
ledger_store,
transaction_store,
state_store,
event_store,
}
}
pub fn get_state_restore_receiver(
&self,
version: Version,
expected_root_hash: HashValue,
) -> Result<JellyfishMerkleRestore<AccountStateBlob>> {
JellyfishMerkleRestore::new_overwrite(
Arc::clone(&self.state_store),
version,
expected_root_hash,
)
}
pub fn save_ledger_infos(&self, ledger_infos: &[LedgerInfoWithSignatures]) -> Result<()> {
ensure!(!ledger_infos.is_empty(), "No LedgerInfos to save.");
let mut cs = ChangeSet::new();
ledger_infos
.iter()
.map(|li| self.ledger_store.put_ledger_info(li, &mut cs))
.collect::<Result<Vec<_>>>()?;
self.db.write_schemas(cs.batch)?;
if let Some(li) = self.ledger_store.get_latest_ledger_info_option() {
if li.ledger_info().epoch() > ledger_infos.last().unwrap().ledger_info().epoch() {
return Ok(());
}
}
self.ledger_store
.set_latest_ledger_info(ledger_infos.last().unwrap().clone());
Ok(())
}
pub fn confirm_or_save_frozen_subtrees(
&self,
num_leaves: LeafCount,
frozen_subtrees: &[HashValue],
) -> Result<()> {
let mut cs = ChangeSet::new();
let positions: Vec<_> = FrozenSubTreeIterator::new(num_leaves).collect();
ensure!(
positions.len() == frozen_subtrees.len(),
"Number of frozen subtree roots not expected. Expected: {}, actual: {}",
positions.len(),
frozen_subtrees.len(),
);
positions
.iter()
.zip(frozen_subtrees.iter().rev())
.map(|(p, h)| {
if let Some(_h) = self.db.get::<TransactionAccumulatorSchema>(p)? {
ensure!(
h == &_h,
"Frozen subtree root does not match that already in DB. Provided: {}, in db: {}.",
h,
_h,
);
} else {
cs.batch.put::<TransactionAccumulatorSchema>(p, h)?;
}
Ok(())
})
.collect::<Result<Vec<_>>>()?;
self.db.write_schemas(cs.batch)
}
pub fn save_transactions(
&self,
first_version: Version,
txns: &[Transaction],
txn_infos: &[TransactionInfo],
events: &[Vec<ContractEvent>],
) -> Result<()> {
let mut cs = ChangeSet::new();
for (idx, txn) in txns.iter().enumerate() {
self.transaction_store
.put_transaction(first_version + idx as Version, txn, &mut cs)?;
}
self.ledger_store
.put_transaction_infos(first_version, txn_infos, &mut cs)?;
self.event_store
.put_events_multiple_versions(first_version, events, &mut cs)?;
self.db.write_schemas(cs.batch)
}
pub fn get_tree_state(&self, num_transactions: LeafCount) -> Result<TreeState> {
let frozen_subtrees = self
.ledger_store
.get_frozen_subtree_hashes(num_transactions)?;
let state_root_hash = if num_transactions == 0 {
self.state_store
.get_root_hash_option(PRE_GENESIS_VERSION)?
.unwrap_or(*SPARSE_MERKLE_PLACEHOLDER_HASH)
} else {
self.state_store.get_root_hash(num_transactions - 1)?
};
Ok(TreeState::new(
num_transactions,
frozen_subtrees,
state_root_hash,
))
}
pub fn get_next_expected_transaction_version(&self) -> Result<Version> {
Ok(self
.diemdb
.get_latest_transaction_info_option()?
.map_or(0, |(ver, _txn_info)| ver + 1))
}
}