85 lines
2.4 KiB
Rust
85 lines
2.4 KiB
Rust
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// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Blooms migration from rocksdb to blooms-db
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use std::path::Path;
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use ethereum_types::Bloom;
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use ethcore::error::Error;
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use rlp;
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use super::kvdb_rocksdb::DatabaseConfig;
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use super::open_database;
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pub fn migrate_blooms<P: AsRef<Path>>(path: P, config: &DatabaseConfig) -> Result<(), Error> {
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// init
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let db = open_database(&path.as_ref().to_string_lossy(), config)?;
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// possible optimization:
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// pre-allocate space on disk for faster migration
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// iterate over header blooms and insert them in blooms-db
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// Some(3) -> COL_EXTRA
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// 3u8 -> ExtrasIndex::BlocksBlooms
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// 0u8 -> level 0
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let blooms_iterator = db.key_value()
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.iter_from_prefix(Some(3), &[3u8, 0u8])
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.filter(|(key, _)| key.len() == 6)
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.take_while(|(key, _)| {
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key[0] == 3u8 && key[1] == 0u8
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})
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.map(|(key, group)| {
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let number =
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(key[2] as u64) << 24 |
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(key[3] as u64) << 16 |
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(key[4] as u64) << 8 |
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(key[5] as u64);
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let blooms = rlp::decode_list::<Bloom>(&group);
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(number, blooms)
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});
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for (number, blooms) in blooms_iterator {
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db.blooms().insert_blooms(number, blooms.iter())?;
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}
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// iterate over trace blooms and insert them in blooms-db
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// Some(4) -> COL_TRACE
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// 1u8 -> TraceDBIndex::BloomGroups
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// 0u8 -> level 0
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let trace_blooms_iterator = db.key_value()
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.iter_from_prefix(Some(4), &[1u8, 0u8])
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.filter(|(key, _)| key.len() == 6)
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.take_while(|(key, _)| {
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key[0] == 1u8 && key[1] == 0u8
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})
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.map(|(key, group)| {
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let number =
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(key[2] as u64) |
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(key[3] as u64) << 8 |
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(key[4] as u64) << 16 |
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(key[5] as u64) << 24;
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let blooms = rlp::decode_list::<Bloom>(&group);
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(number, blooms)
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});
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for (number, blooms) in trace_blooms_iterator {
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db.trace_blooms().insert_blooms(number, blooms.iter())?;
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}
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Ok(())
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}
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