// Copyright 2015, 2016 Ethcore (UK) Ltd. // This file is part of Parity. // Parity is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // Parity is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with Parity. If not, see . //! Blockchain database. use util::*; use rocksdb::{DB, WriteBatch, Writable}; use header::*; use extras::*; use transaction::*; use views::*; /// Represents a tree route between `from` block and `to` block: pub struct TreeRoute { /// A vector of hashes of all blocks, ordered from `from` to `to`. pub blocks: Vec, /// Best common ancestor of these blocks. pub ancestor: H256, /// An index where best common ancestor would be. pub index: usize } /// Represents blockchain's in-memory cache size in bytes. #[derive(Debug)] pub struct CacheSize { /// Blocks cache size. pub blocks: usize, /// BlockDetails cache size. pub block_details: usize, /// Transaction addresses cache size. pub transaction_addresses: usize, /// Logs cache size. pub block_logs: usize, /// Blooms cache size. pub blocks_blooms: usize } impl CacheSize { /// Total amount used by the cache. fn total(&self) -> usize { self.blocks + self.block_details + self.transaction_addresses + self.block_logs + self.blocks_blooms } } /// Information about best block gathered together struct BestBlock { pub hash: H256, pub number: BlockNumber, pub total_difficulty: U256 } impl BestBlock { fn new() -> BestBlock { BestBlock { hash: H256::new(), number: 0, total_difficulty: U256::from(0) } } } /// Interface for querying blocks by hash and by number. pub trait BlockProvider { /// Returns true if the given block is known /// (though not necessarily a part of the canon chain). fn is_known(&self, hash: &H256) -> bool; /// Get raw block data fn block(&self, hash: &H256) -> Option; /// Get the familial details concerning a block. fn block_details(&self, hash: &H256) -> Option; /// Get the hash of given block's number. fn block_hash(&self, index: BlockNumber) -> Option; /// Get the partial-header of a block. fn block_header(&self, hash: &H256) -> Option

{ self.block(hash).map(|bytes| BlockView::new(&bytes).header()) } /// Get a list of uncles for a given block. /// Returns None if block deos not exist. fn uncles(&self, hash: &H256) -> Option> { self.block(hash).map(|bytes| BlockView::new(&bytes).uncles()) } /// Get a list of uncle hashes for a given block. /// Returns None if block does not exist. fn uncle_hashes(&self, hash: &H256) -> Option> { self.block(hash).map(|bytes| BlockView::new(&bytes).uncle_hashes()) } /// Get the number of given block's hash. fn block_number(&self, hash: &H256) -> Option { self.block(hash).map(|bytes| BlockView::new(&bytes).header_view().number()) } /// Get a list of transactions for a given block. /// Returns None if block deos not exist. fn transactions(&self, hash: &H256) -> Option> { self.block(hash).map(|bytes| BlockView::new(&bytes).transactions()) } /// Returns reference to genesis hash. fn genesis_hash(&self) -> H256 { self.block_hash(0).expect("Genesis hash should always exist") } /// Returns the header of the genesis block. fn genesis_header(&self) -> Header { self.block_header(&self.genesis_hash()).unwrap() } } #[derive(Debug, Hash, Eq, PartialEq, Clone)] enum CacheID { Block(H256), Extras(ExtrasIndex, H256), } struct CacheManager { cache_usage: VecDeque>, in_use: HashSet, } /// Structure providing fast access to blockchain data. /// /// **Does not do input data verification.** pub struct BlockChain { pref_cache_size: usize, max_cache_size: usize, best_block: RwLock, // block cache blocks: RwLock>, // extra caches block_details: RwLock>, block_hashes: RwLock>, transaction_addresses: RwLock>, block_logs: RwLock>, blocks_blooms: RwLock>, extras_db: DB, blocks_db: DB, cache_man: RwLock, } impl BlockProvider for BlockChain { /// Returns true if the given block is known /// (though not necessarily a part of the canon chain). fn is_known(&self, hash: &H256) -> bool { self.query_extras_exist(hash, &self.block_details) } /// Get raw block data fn block(&self, hash: &H256) -> Option { { let read = self.blocks.read().unwrap(); if let Some(v) = read.get(hash) { return Some(v.clone()); } } let opt = self.blocks_db.get(hash) .expect("Low level database error. Some issue with disk?"); self.note_used(CacheID::Block(hash.clone())); match opt { Some(b) => { let bytes: Bytes = b.to_vec(); let mut write = self.blocks.write().unwrap(); write.insert(hash.clone(), bytes.clone()); Some(bytes) }, None => None } } /// Get the familial details concerning a block. fn block_details(&self, hash: &H256) -> Option { self.query_extras(hash, &self.block_details) } /// Get the hash of given block's number. fn block_hash(&self, index: BlockNumber) -> Option { self.query_extras(&index, &self.block_hashes) } } const COLLECTION_QUEUE_SIZE: usize = 8; impl BlockChain { /// Create new instance of blockchain from given Genesis /// /// ```rust /// extern crate ethcore_util as util; /// extern crate ethcore; /// use std::env; /// use std::str::FromStr; /// use ethcore::spec::*; /// use ethcore::blockchain::*; /// use ethcore::ethereum; /// use util::hash::*; /// use util::uint::*; /// /// fn main() { /// let spec = ethereum::new_frontier(); /// /// let mut dir = env::temp_dir(); /// dir.push(H32::random().hex()); /// /// let bc = BlockChain::new(&spec.genesis_block(), &dir); /// /// let genesis_hash = "d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3"; /// assert_eq!(bc.genesis_hash(), H256::from_str(genesis_hash).unwrap()); /// assert!(bc.is_known(&bc.genesis_hash())); /// assert_eq!(bc.genesis_hash(), bc.block_hash(0).unwrap()); /// } /// ``` pub fn new(genesis: &[u8], path: &Path) -> BlockChain { // open extras db let mut extras_path = path.to_path_buf(); extras_path.push("extras"); let extras_db = DB::open_default(extras_path.to_str().unwrap()).unwrap(); // open blocks db let mut blocks_path = path.to_path_buf(); blocks_path.push("blocks"); let blocks_db = DB::open_default(blocks_path.to_str().unwrap()).unwrap(); let mut cache_man = CacheManager{cache_usage: VecDeque::new(), in_use: HashSet::new()}; (0..COLLECTION_QUEUE_SIZE).foreach(|_| cache_man.cache_usage.push_back(HashSet::new())); let bc = BlockChain { pref_cache_size: 1 << 14, max_cache_size: 1 << 20, best_block: RwLock::new(BestBlock::new()), blocks: RwLock::new(HashMap::new()), block_details: RwLock::new(HashMap::new()), block_hashes: RwLock::new(HashMap::new()), transaction_addresses: RwLock::new(HashMap::new()), block_logs: RwLock::new(HashMap::new()), blocks_blooms: RwLock::new(HashMap::new()), extras_db: extras_db, blocks_db: blocks_db, cache_man: RwLock::new(cache_man), }; // load best block let best_block_hash = match bc.extras_db.get(b"best").unwrap() { Some(best) => H256::from_slice(&best), None => { // best block does not exist // we need to insert genesis into the cache let block = BlockView::new(genesis); let header = block.header_view(); let hash = block.sha3(); let details = BlockDetails { number: header.number(), total_difficulty: header.difficulty(), parent: header.parent_hash(), children: vec![] }; bc.blocks_db.put(&hash, genesis).unwrap(); let batch = WriteBatch::new(); batch.put_extras(&hash, &details); batch.put_extras(&header.number(), &hash); batch.put(b"best", &hash).unwrap(); bc.extras_db.write(batch).unwrap(); hash } }; { let mut best_block = bc.best_block.write().unwrap(); best_block.number = bc.block_number(&best_block_hash).unwrap(); best_block.total_difficulty = bc.block_details(&best_block_hash).unwrap().total_difficulty; best_block.hash = best_block_hash; } bc } /// Set the cache configuration. pub fn configure_cache(&mut self, pref_cache_size: usize, max_cache_size: usize) { self.pref_cache_size = pref_cache_size; self.max_cache_size = max_cache_size; } /// Returns a tree route between `from` and `to`, which is a tuple of: /// /// - a vector of hashes of all blocks, ordered from `from` to `to`. /// /// - common ancestor of these blocks. /// /// - an index where best common ancestor would be /// /// 1.) from newer to older /// /// - bc: `A1 -> A2 -> A3 -> A4 -> A5` /// - from: A5, to: A4 /// - route: /// /// ```json /// { blocks: [A5], ancestor: A4, index: 1 } /// ``` /// /// 2.) from older to newer /// /// - bc: `A1 -> A2 -> A3 -> A4 -> A5` /// - from: A3, to: A4 /// - route: /// /// ```json /// { blocks: [A4], ancestor: A3, index: 0 } /// ``` /// /// 3.) fork: /// /// - bc: /// /// ```text /// A1 -> A2 -> A3 -> A4 /// -> B3 -> B4 /// ``` /// - from: B4, to: A4 /// - route: /// /// ```json /// { blocks: [B4, B3, A3, A4], ancestor: A2, index: 2 } /// ``` pub fn tree_route(&self, from: H256, to: H256) -> Option { let from_details = match self.block_details(&from) { Some(h) => h, None => return None, }; let to_details = match self.block_details(&to) { Some(h) => h, None => return None, }; Some(self.tree_route_aux((&from_details, &from), (&to_details, &to))) } /// Similar to `tree_route` function, but can be used to return a route /// between blocks which may not be in database yet. fn tree_route_aux(&self, from: (&BlockDetails, &H256), to: (&BlockDetails, &H256)) -> TreeRoute { let mut from_branch = vec![]; let mut to_branch = vec![]; let mut from_details = from.0.clone(); let mut to_details = to.0.clone(); let mut current_from = from.1.clone(); let mut current_to = to.1.clone(); // reset from && to to the same level while from_details.number > to_details.number { from_branch.push(current_from); current_from = from_details.parent.clone(); from_details = self.block_details(&from_details.parent).unwrap(); } while to_details.number > from_details.number { to_branch.push(current_to); current_to = to_details.parent.clone(); to_details = self.block_details(&to_details.parent).unwrap(); } assert_eq!(from_details.number, to_details.number); // move to shared parent while current_from != current_to { from_branch.push(current_from); current_from = from_details.parent.clone(); from_details = self.block_details(&from_details.parent).unwrap(); to_branch.push(current_to); current_to = to_details.parent.clone(); to_details = self.block_details(&to_details.parent).unwrap(); } let index = from_branch.len(); from_branch.extend(to_branch.into_iter().rev()); TreeRoute { blocks: from_branch, ancestor: current_from, index: index } } /// Inserts the block into backing cache database. /// Expects the block to be valid and already verified. /// If the block is already known, does nothing. pub fn insert_block(&self, bytes: &[u8]) { // create views onto rlp let block = BlockView::new(bytes); let header = block.header_view(); let hash = header.sha3(); if self.is_known(&hash) { return; } // store block in db self.blocks_db.put(&hash, &bytes).unwrap(); let (batch, new_best, details) = self.block_to_extras_insert_batch(bytes); // update best block let mut best_block = self.best_block.write().unwrap(); if let Some(b) = new_best { *best_block = b; } // update caches let mut write = self.block_details.write().unwrap(); write.remove(&header.parent_hash()); write.insert(hash.clone(), details); self.note_used(CacheID::Block(hash)); // update extras database self.extras_db.write(batch).unwrap(); } /// Transforms block into WriteBatch that may be written into database /// Additionally, if it's new best block it returns new best block object. fn block_to_extras_insert_batch(&self, bytes: &[u8]) -> (WriteBatch, Option, BlockDetails) { // create views onto rlp let block = BlockView::new(bytes); let header = block.header_view(); // prepare variables let hash = block.sha3(); let mut parent_details = self.block_details(&header.parent_hash()).expect("Invalid parent hash."); let total_difficulty = parent_details.total_difficulty + header.difficulty(); let is_new_best = total_difficulty > self.best_block_total_difficulty(); let parent_hash = header.parent_hash(); // create current block details let details = BlockDetails { number: header.number(), total_difficulty: total_difficulty, parent: parent_hash.clone(), children: vec![] }; // prepare the batch let batch = WriteBatch::new(); // insert new block details batch.put_extras(&hash, &details); // update parent details parent_details.children.push(hash.clone()); batch.put_extras(&parent_hash, &parent_details); // if it's not new best block, just return if !is_new_best { return (batch, None, details); } // if its new best block we need to make sure that all ancestors // are moved to "canon chain" // find the route between old best block and the new one let best_hash = self.best_block_hash(); let best_details = self.block_details(&best_hash).expect("best block hash is invalid!"); let route = self.tree_route_aux((&best_details, &best_hash), (&details, &hash)); match route.blocks.len() { // its our parent 1 => batch.put_extras(&header.number(), &hash), // it is a fork i if i > 1 => { let ancestor_number = self.block_number(&route.ancestor).unwrap(); let start_number = ancestor_number + 1; for (index, hash) in route.blocks.iter().skip(route.index).enumerate() { batch.put_extras(&(start_number + index as BlockNumber), hash); } }, // route.blocks.len() could be 0 only if inserted block is best block, // and this is not possible at this stage _ => { unreachable!(); } }; // this is new best block batch.put(b"best", &hash).unwrap(); let best_block = BestBlock { hash: hash, number: header.number(), total_difficulty: total_difficulty }; (batch, Some(best_block), details) } /// Returns true if transaction is known. pub fn is_known_transaction(&self, hash: &H256) -> bool { self.query_extras_exist(hash, &self.transaction_addresses) } /// Get best block hash. pub fn best_block_hash(&self) -> H256 { self.best_block.read().unwrap().hash.clone() } /// Get best block number. pub fn best_block_number(&self) -> BlockNumber { self.best_block.read().unwrap().number } /// Get best block total difficulty. pub fn best_block_total_difficulty(&self) -> U256 { self.best_block.read().unwrap().total_difficulty } /// Get the transactions' log blooms of a block. pub fn log_blooms(&self, hash: &H256) -> Option { self.query_extras(hash, &self.block_logs) } fn query_extras(&self, hash: &K, cache: &RwLock>) -> Option where T: Clone + Decodable + ExtrasIndexable, K: ExtrasSliceConvertable + Eq + Hash + Clone { { let read = cache.read().unwrap(); if let Some(v) = read.get(hash) { return Some(v.clone()); } } if let Some(h) = hash.as_h256() { self.note_used(CacheID::Extras(T::extras_index(), h.clone())); } self.extras_db.get_extras(hash).map(| t: T | { let mut write = cache.write().unwrap(); write.insert(hash.clone(), t.clone()); t }) } fn query_extras_exist(&self, hash: &K, cache: &RwLock>) -> bool where K: ExtrasSliceConvertable + Eq + Hash + Clone, T: ExtrasIndexable { { let read = cache.read().unwrap(); if let Some(_) = read.get(hash) { return true; } } self.extras_db.extras_exists::<_, T>(hash) } /// Get current cache size. pub fn cache_size(&self) -> CacheSize { CacheSize { blocks: self.blocks.read().unwrap().heap_size_of_children(), block_details: self.block_details.read().unwrap().heap_size_of_children(), transaction_addresses: self.transaction_addresses.read().unwrap().heap_size_of_children(), block_logs: self.block_logs.read().unwrap().heap_size_of_children(), blocks_blooms: self.blocks_blooms.read().unwrap().heap_size_of_children() } } /// Let the cache system know that a cacheable item has been used. fn note_used(&self, id: CacheID) { let mut cache_man = self.cache_man.write().unwrap(); if !cache_man.cache_usage[0].contains(&id) { cache_man.cache_usage[0].insert(id.clone()); if cache_man.in_use.contains(&id) { if let Some(c) = cache_man.cache_usage.iter_mut().skip(1).find(|e|e.contains(&id)) { c.remove(&id); } } else { cache_man.in_use.insert(id); } } } /// Ticks our cache system and throws out any old data. pub fn collect_garbage(&self) { if self.cache_size().total() < self.pref_cache_size { return; } for _ in 0..COLLECTION_QUEUE_SIZE { { let mut cache_man = self.cache_man.write().unwrap(); let mut blocks = self.blocks.write().unwrap(); let mut block_details = self.block_details.write().unwrap(); let mut block_hashes = self.block_hashes.write().unwrap(); let mut transaction_addresses = self.transaction_addresses.write().unwrap(); let mut block_logs = self.block_logs.write().unwrap(); let mut blocks_blooms = self.blocks_blooms.write().unwrap(); for id in cache_man.cache_usage.pop_back().unwrap().into_iter() { cache_man.in_use.remove(&id); match id { CacheID::Block(h) => { blocks.remove(&h); }, CacheID::Extras(ExtrasIndex::BlockDetails, h) => { block_details.remove(&h); }, CacheID::Extras(ExtrasIndex::TransactionAddress, h) => { transaction_addresses.remove(&h); }, CacheID::Extras(ExtrasIndex::BlockLogBlooms, h) => { block_logs.remove(&h); }, CacheID::Extras(ExtrasIndex::BlocksBlooms, h) => { blocks_blooms.remove(&h); }, _ => panic!(), } } cache_man.cache_usage.push_front(HashSet::new()); // TODO: handle block_hashes properly. block_hashes.clear(); } if self.cache_size().total() < self.max_cache_size { break; } } // TODO: m_lastCollection = chrono::system_clock::now(); } } #[cfg(test)] mod tests { use std::str::FromStr; use rustc_serialize::hex::FromHex; use util::hash::*; use blockchain::*; use tests::helpers::*; #[test] fn valid_tests_extra32() { let genesis = "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".from_hex().unwrap(); let temp = RandomTempPath::new(); let bc = BlockChain::new(&genesis, temp.as_path()); let genesis_hash = H256::from_str("3caa2203f3d7c136c0295ed128a7d31cea520b1ca5e27afe17d0853331798942").unwrap(); assert_eq!(bc.genesis_hash(), genesis_hash.clone()); assert_eq!(bc.best_block_number(), 0); assert_eq!(bc.best_block_hash(), genesis_hash.clone()); assert_eq!(bc.block_hash(0), Some(genesis_hash.clone())); assert_eq!(bc.block_hash(1), None); let first = "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".from_hex().unwrap(); bc.insert_block(&first); let first_hash = H256::from_str("a940e5af7d146b3b917c953a82e1966b906dace3a4e355b5b0a4560190357ea1").unwrap(); assert_eq!(bc.block_hash(0), Some(genesis_hash.clone())); assert_eq!(bc.best_block_number(), 1); assert_eq!(bc.best_block_hash(), first_hash.clone()); assert_eq!(bc.block_hash(1), Some(first_hash.clone())); assert_eq!(bc.block_details(&first_hash).unwrap().parent, genesis_hash.clone()); assert_eq!(bc.block_details(&genesis_hash).unwrap().children, vec![first_hash.clone()]); assert_eq!(bc.block_hash(2), None); } #[test] #[allow(cyclomatic_complexity)] fn test_small_fork() { let genesis = "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".from_hex().unwrap(); let b1 = "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".from_hex().unwrap(); let b2 = "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".from_hex().unwrap(); let b3a = "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".from_hex().unwrap(); let b3b = "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".from_hex().unwrap(); let genesis_hash = H256::from_str("5716670833ec874362d65fea27a7cd35af5897d275b31a44944113111e4e96d2").unwrap(); let b1_hash = H256::from_str("437e51676ff10756fcfee5edd9159fa41dbcb1b2c592850450371cbecd54ee4f").unwrap(); let b2_hash = H256::from_str("36fde1253128666fcb95a5956da14a73489e988bb72738717ec1d31e1cee781a").unwrap(); let b3a_hash = H256::from_str("c208f88c9f5bf7e00840439742c12e5226d9752981f3ec0521bdcb6dd08af277").unwrap(); let b3b_hash = H256::from_str("bf72270ae0d95c9ea39a6adab994793fddb8c10fba7391e26279474124605d54").unwrap(); // b3a is a part of canon chain, whereas b3b is part of sidechain let best_block_hash = H256::from_str("c208f88c9f5bf7e00840439742c12e5226d9752981f3ec0521bdcb6dd08af277").unwrap(); let temp = RandomTempPath::new(); let bc = BlockChain::new(&genesis, temp.as_path()); bc.insert_block(&b1); bc.insert_block(&b2); bc.insert_block(&b3a); bc.insert_block(&b3b); assert_eq!(bc.best_block_hash(), best_block_hash); assert_eq!(bc.block_number(&genesis_hash).unwrap(), 0); assert_eq!(bc.block_number(&b1_hash).unwrap(), 1); assert_eq!(bc.block_number(&b2_hash).unwrap(), 2); assert_eq!(bc.block_number(&b3a_hash).unwrap(), 3); assert_eq!(bc.block_number(&b3b_hash).unwrap(), 3); assert_eq!(bc.block_hash(0).unwrap(), genesis_hash); assert_eq!(bc.block_hash(1).unwrap(), b1_hash); assert_eq!(bc.block_hash(2).unwrap(), b2_hash); assert_eq!(bc.block_hash(3).unwrap(), b3a_hash); // test trie route let r0_1 = bc.tree_route(genesis_hash.clone(), b1_hash.clone()).unwrap(); assert_eq!(r0_1.ancestor, genesis_hash); assert_eq!(r0_1.blocks, [b1_hash.clone()]); assert_eq!(r0_1.index, 0); let r0_2 = bc.tree_route(genesis_hash.clone(), b2_hash.clone()).unwrap(); assert_eq!(r0_2.ancestor, genesis_hash); assert_eq!(r0_2.blocks, [b1_hash.clone(), b2_hash.clone()]); assert_eq!(r0_2.index, 0); let r1_3a = bc.tree_route(b1_hash.clone(), b3a_hash.clone()).unwrap(); assert_eq!(r1_3a.ancestor, b1_hash); assert_eq!(r1_3a.blocks, [b2_hash.clone(), b3a_hash.clone()]); assert_eq!(r1_3a.index, 0); let r1_3b = bc.tree_route(b1_hash.clone(), b3b_hash.clone()).unwrap(); assert_eq!(r1_3b.ancestor, b1_hash); assert_eq!(r1_3b.blocks, [b2_hash.clone(), b3b_hash.clone()]); assert_eq!(r1_3b.index, 0); let r3a_3b = bc.tree_route(b3a_hash.clone(), b3b_hash.clone()).unwrap(); assert_eq!(r3a_3b.ancestor, b2_hash); assert_eq!(r3a_3b.blocks, [b3a_hash.clone(), b3b_hash.clone()]); assert_eq!(r3a_3b.index, 1); let r1_0 = bc.tree_route(b1_hash.clone(), genesis_hash.clone()).unwrap(); assert_eq!(r1_0.ancestor, genesis_hash); assert_eq!(r1_0.blocks, [b1_hash.clone()]); assert_eq!(r1_0.index, 1); let r2_0 = bc.tree_route(b2_hash.clone(), genesis_hash.clone()).unwrap(); assert_eq!(r2_0.ancestor, genesis_hash); assert_eq!(r2_0.blocks, [b2_hash.clone(), b1_hash.clone()]); assert_eq!(r2_0.index, 2); let r3a_1 = bc.tree_route(b3a_hash.clone(), b1_hash.clone()).unwrap(); assert_eq!(r3a_1.ancestor, b1_hash); assert_eq!(r3a_1.blocks, [b3a_hash.clone(), b2_hash.clone()]); assert_eq!(r3a_1.index, 2); let r3b_1 = bc.tree_route(b3b_hash.clone(), b1_hash.clone()).unwrap(); assert_eq!(r3b_1.ancestor, b1_hash); assert_eq!(r3b_1.blocks, [b3b_hash.clone(), b2_hash.clone()]); assert_eq!(r3b_1.index, 2); let r3b_3a = bc.tree_route(b3b_hash.clone(), b3a_hash.clone()).unwrap(); assert_eq!(r3b_3a.ancestor, b2_hash); assert_eq!(r3b_3a.blocks, [b3b_hash.clone(), b3a_hash.clone()]); assert_eq!(r3b_3a.index, 1); } #[test] fn test_reopen_blockchain_db() { let genesis = "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".from_hex().unwrap(); let b1 = "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".from_hex().unwrap(); let genesis_hash = H256::from_str("5716670833ec874362d65fea27a7cd35af5897d275b31a44944113111e4e96d2").unwrap(); let b1_hash = H256::from_str("437e51676ff10756fcfee5edd9159fa41dbcb1b2c592850450371cbecd54ee4f").unwrap(); let temp = RandomTempPath::new(); { let bc = BlockChain::new(&genesis, temp.as_path()); assert_eq!(bc.best_block_hash(), genesis_hash); bc.insert_block(&b1); assert_eq!(bc.best_block_hash(), b1_hash); } { let bc = BlockChain::new(&genesis, temp.as_path()); assert_eq!(bc.best_block_hash(), b1_hash); } } #[test] fn can_contain_arbitrary_block_sequence() { let bc_result = generate_dummy_blockchain(50); let bc = bc_result.reference(); assert_eq!(bc.best_block_number(), 49); } #[test] fn can_collect_garbage() { let bc_result = generate_dummy_blockchain(3000); let bc = bc_result.reference(); assert_eq!(bc.best_block_number(), 2999); let best_hash = bc.best_block_hash(); let mut block_header = bc.block_header(&best_hash); while !block_header.is_none() { block_header = bc.block_header(&block_header.unwrap().parent_hash); } assert!(bc.cache_size().blocks > 1024 * 1024); for _ in 0..2 { bc.collect_garbage(); } assert!(bc.cache_size().blocks < 1024 * 1024); } #[test] fn can_contain_arbitrary_block_sequence_with_extra() { let bc_result = generate_dummy_blockchain_with_extra(25); let bc = bc_result.reference(); assert_eq!(bc.best_block_number(), 24); } #[test] fn can_contain_only_genesis_block() { let bc_result = generate_dummy_empty_blockchain(); let bc = bc_result.reference(); assert_eq!(bc.best_block_number(), 0); } }