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use crate::{
event_store::EventStore,
ledger_store::LedgerStore,
metrics::{
BACKUP_EPOCH_ENDING_EPOCH, BACKUP_STATE_SNAPSHOT_LEAF_IDX, BACKUP_STATE_SNAPSHOT_VERSION,
BACKUP_TXN_VERSION,
},
state_store::StateStore,
transaction_store::TransactionStore,
};
use anyhow::{anyhow, ensure, Result};
use diem_crypto::hash::HashValue;
use diem_jellyfish_merkle::iterator::JellyfishMerkleIterator;
use diem_types::{
account_state_blob::AccountStateBlob,
contract_event::ContractEvent,
ledger_info::LedgerInfoWithSignatures,
proof::{SparseMerkleRangeProof, TransactionAccumulatorRangeProof, TransactionInfoWithProof},
transaction::{Transaction, TransactionInfo, Version},
};
use itertools::zip_eq;
use serde::{Deserialize, Serialize};
use std::{fmt, sync::Arc};
#[derive(Clone)]
pub struct BackupHandler {
ledger_store: Arc<LedgerStore>,
transaction_store: Arc<TransactionStore>,
state_store: Arc<StateStore>,
event_store: Arc<EventStore>,
}
impl BackupHandler {
pub(crate) fn new(
ledger_store: Arc<LedgerStore>,
transaction_store: Arc<TransactionStore>,
state_store: Arc<StateStore>,
event_store: Arc<EventStore>,
) -> Self {
Self {
ledger_store,
transaction_store,
state_store,
event_store,
}
}
pub fn get_transaction_iter(
&self,
start_version: Version,
num_transactions: usize,
) -> Result<impl Iterator<Item = Result<(Transaction, TransactionInfo, Vec<ContractEvent>)>> + '_>
{
let txn_iter = self
.transaction_store
.get_transaction_iter(start_version, num_transactions)?;
let txn_info_iter = self
.ledger_store
.get_transaction_info_iter(start_version, num_transactions)?;
let events_iter = self
.event_store
.get_events_by_version_iter(start_version, num_transactions)?;
let zipped = zip_eq(zip_eq(txn_iter, txn_info_iter), events_iter)
.enumerate()
.map(move |(idx, ((txn_res, txn_info_res), events_res))| {
BACKUP_TXN_VERSION.set((start_version.wrapping_add(idx as u64)) as i64);
Ok((txn_res?, txn_info_res?, events_res?))
});
Ok(zipped)
}
pub fn get_transaction_range_proof(
&self,
first_version: Version,
last_version: Version,
) -> Result<(TransactionAccumulatorRangeProof, LedgerInfoWithSignatures)> {
ensure!(
last_version >= first_version,
"Bad transaction range: [{}, {}]",
first_version,
last_version
);
let num_transactions = last_version - first_version + 1;
let epoch = self.ledger_store.get_epoch(last_version)?;
let ledger_info = self.ledger_store.get_latest_ledger_info_in_epoch(epoch)?;
let accumulator_proof = self.ledger_store.get_transaction_range_proof(
Some(first_version),
num_transactions,
ledger_info.ledger_info().version(),
)?;
Ok((accumulator_proof, ledger_info))
}
pub fn get_account_iter(
&self,
version: Version,
) -> Result<Box<dyn Iterator<Item = Result<(HashValue, AccountStateBlob)>> + Send + Sync>> {
let iterator = JellyfishMerkleIterator::new(
Arc::clone(&self.state_store),
version,
HashValue::zero(),
)?
.enumerate()
.map(move |(idx, res)| {
BACKUP_STATE_SNAPSHOT_VERSION.set(version as i64);
BACKUP_STATE_SNAPSHOT_LEAF_IDX.set(idx as i64);
res
});
Ok(Box::new(iterator))
}
pub fn get_account_state_range_proof(
&self,
rightmost_key: HashValue,
version: Version,
) -> Result<SparseMerkleRangeProof> {
self.state_store
.get_account_state_range_proof(rightmost_key, version)
}
pub fn get_db_state(&self) -> Result<Option<DbState>> {
self.ledger_store
.get_startup_info()?
.map(|s| {
Ok(DbState {
epoch: s.get_epoch_state().epoch,
committed_version: s
.committed_tree_state
.num_transactions
.checked_sub(1)
.ok_or_else(|| anyhow!("Bootstrapped DB has no transactions."))?,
synced_version: s
.synced_tree_state
.as_ref()
.unwrap_or(&s.committed_tree_state)
.num_transactions
.checked_sub(1)
.ok_or_else(|| anyhow!("Bootstrapped DB has no transactions."))?,
})
})
.transpose()
}
pub fn get_state_root_proof(
&self,
version: Version,
) -> Result<(TransactionInfoWithProof, LedgerInfoWithSignatures)> {
let epoch = self.ledger_store.get_epoch(version)?;
let ledger_info = self.ledger_store.get_latest_ledger_info_in_epoch(epoch)?;
let txn_info = self
.ledger_store
.get_transaction_info_with_proof(version, ledger_info.ledger_info().version())?;
Ok((txn_info, ledger_info))
}
pub fn get_epoch_ending_ledger_info_iter(
&self,
start_epoch: u64,
end_epoch: u64,
) -> Result<impl Iterator<Item = Result<LedgerInfoWithSignatures>> + '_> {
Ok(self
.ledger_store
.get_epoch_ending_ledger_info_iter(start_epoch, end_epoch)?
.enumerate()
.map(move |(idx, li)| {
BACKUP_EPOCH_ENDING_EPOCH.set((start_epoch + idx as u64) as i64);
li
}))
}
}
#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
pub struct DbState {
pub epoch: u64,
pub committed_version: Version,
pub synced_version: Version,
}
impl fmt::Display for DbState {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"epoch: {}, committed_version: {}, synced_version: {}",
self.epoch, self.committed_version, self.synced_version,
)
}
}