Merge pull request #88 from gavofyork/verification
Block verification tests; BlockProvider blockchain trait for testing
This commit is contained in:
Gav Wood
commit
283f62f048
@ -47,6 +47,55 @@ impl BestBlock {
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}
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}
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/// Interface for querying blocks by hash and by number.
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pub trait BlockProvider {
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/// Returns true if the given block is known
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/// (though not necessarily a part of the canon chain).
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fn is_known(&self, hash: &H256) -> bool;
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/// Get raw block data
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fn block(&self, hash: &H256) -> Option<Bytes>;
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/// Get the familial details concerning a block.
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fn block_details(&self, hash: &H256) -> Option<BlockDetails>;
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/// Get the hash of given block's number.
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fn block_hash(&self, index: BlockNumber) -> Option<H256>;
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/// Get the partial-header of a block.
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fn block_header(&self, hash: &H256) -> Option<Header> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).header())
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}
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/// Get a list of uncles for a given block.
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/// Returns None if block deos not exist.
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fn uncles(&self, hash: &H256) -> Option<Vec<Header>> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).uncles())
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}
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/// Get a list of uncle hashes for a given block.
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/// Returns None if block does not exist.
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fn uncle_hashes(&self, hash: &H256) -> Option<Vec<H256>> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).uncle_hashes())
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}
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/// Get the number of given block's hash.
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fn block_number(&self, hash: &H256) -> Option<BlockNumber> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).header_view().number())
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}
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/// Get a list of transactions for a given block.
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/// Returns None if block deos not exist.
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fn transactions(&self, hash: &H256) -> Option<Vec<Transaction>> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).transactions())
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}
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/// Returns reference to genesis hash.
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fn genesis_hash(&self) -> H256 {
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self.block_hash(0).expect("Genesis hash should always exist")
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}
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}
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/// Structure providing fast access to blockchain data.
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///
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/// **Does not do input data verification.**
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@ -67,6 +116,48 @@ pub struct BlockChain {
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blocks_db: DB
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}
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impl BlockProvider for BlockChain {
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/// Returns true if the given block is known
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/// (though not necessarily a part of the canon chain).
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fn is_known(&self, hash: &H256) -> bool {
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self.query_extras_exist(hash, &self.block_details)
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}
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/// Get raw block data
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fn block(&self, hash: &H256) -> Option<Bytes> {
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{
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let read = self.blocks.read().unwrap();
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match read.get(hash) {
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Some(v) => return Some(v.clone()),
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None => ()
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}
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}
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let opt = self.blocks_db.get(hash)
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.expect("Low level database error. Some issue with disk?");
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match opt {
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Some(b) => {
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let bytes: Bytes = b.to_vec();
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let mut write = self.blocks.write().unwrap();
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write.insert(hash.clone(), bytes.clone());
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Some(bytes)
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},
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None => None
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}
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}
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/// Get the familial details concerning a block.
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fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
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self.query_extras(hash, &self.block_details)
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}
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/// Get the hash of given block's number.
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fn block_hash(&self, index: BlockNumber) -> Option<H256> {
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self.query_extras(&index, &self.block_hashes)
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}
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}
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impl BlockChain {
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/// Create new instance of blockchain from given Genesis
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///
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@ -363,61 +454,11 @@ impl BlockChain {
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(batch, Some(best_block))
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}
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/// Returns true if the given block is known
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/// (though not necessarily a part of the canon chain).
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pub fn is_known(&self, hash: &H256) -> bool {
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self.query_extras_exist(hash, &self.block_details)
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}
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/// Returns true if transaction is known.
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pub fn is_known_transaction(&self, hash: &H256) -> bool {
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self.query_extras_exist(hash, &self.transaction_addresses)
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}
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/// Returns reference to genesis hash.
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pub fn genesis_hash(&self) -> H256 {
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self.block_hash(0).expect("Genesis hash should always exist")
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}
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/// Get the partial-header of a block.
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pub fn block_header(&self, hash: &H256) -> Option<Header> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).header())
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}
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/// Get a list of transactions for a given block.
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/// Returns None if block deos not exist.
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pub fn transactions(&self, hash: &H256) -> Option<Vec<Transaction>> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).transactions())
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}
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/// Get a list of transaction hashes for a given block.
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/// Returns None if block does not exist.
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pub fn transaction_hashes(&self, hash: &H256) -> Option<Vec<H256>> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).transaction_hashes())
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}
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/// Get a list of uncles for a given block.
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/// Returns None if block deos not exist.
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pub fn uncles(&self, hash: &H256) -> Option<Vec<Header>> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).uncles())
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}
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/// Get a list of uncle hashes for a given block.
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/// Returns None if block does not exist.
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pub fn uncle_hashes(&self, hash: &H256) -> Option<Vec<H256>> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).uncle_hashes())
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}
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/// Get the familial details concerning a block.
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pub fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
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self.query_extras(hash, &self.block_details)
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}
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/// Get the hash of given block's number.
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pub fn block_hash(&self, index: BlockNumber) -> Option<H256> {
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self.query_extras(&index, &self.block_hashes)
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}
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/// Get best block hash.
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pub fn best_block_hash(&self) -> H256 {
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self.best_block.read().unwrap().hash.clone()
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@ -433,40 +474,11 @@ impl BlockChain {
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self.best_block.read().unwrap().total_difficulty
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}
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/// Get the number of given block's hash.
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pub fn block_number(&self, hash: &H256) -> Option<BlockNumber> {
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self.block(hash).map(|bytes| BlockView::new(&bytes).header_view().number())
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}
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/// Get the transactions' log blooms of a block.
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pub fn log_blooms(&self, hash: &H256) -> Option<BlockLogBlooms> {
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self.query_extras(hash, &self.block_logs)
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}
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/// Get raw block data
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pub fn block(&self, hash: &H256) -> Option<Bytes> {
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{
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let read = self.blocks.read().unwrap();
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match read.get(hash) {
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Some(v) => return Some(v.clone()),
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None => ()
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}
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}
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let opt = self.blocks_db.get(hash)
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.expect("Low level database error. Some issue with disk?");
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match opt {
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Some(b) => {
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let bytes: Bytes = b.to_vec();
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let mut write = self.blocks.write().unwrap();
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write.insert(hash.clone(), bytes.clone());
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Some(bytes)
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},
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None => None
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}
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}
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fn query_extras<K, T>(&self, hash: &K, cache: &RwLock<HashMap<K, T>>) -> Option<T> where
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T: Clone + Decodable + ExtrasIndexable,
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K: ExtrasSliceConvertable + Eq + Hash + Clone {
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@ -1,5 +1,5 @@
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use util::*;
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use blockchain::BlockChain;
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use blockchain::{BlockChain, BlockProvider};
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use views::BlockView;
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use error::*;
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use header::BlockNumber;
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@ -3,13 +3,13 @@
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use util::*;
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use header::BlockNumber;
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#[derive(Debug)]
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#[derive(Debug, PartialEq, Eq)]
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pub struct Mismatch<T: fmt::Debug> {
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pub expected: T,
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pub found: T,
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}
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#[derive(Debug)]
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#[derive(Debug, PartialEq, Eq)]
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pub struct OutOfBounds<T: fmt::Debug> {
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pub min: Option<T>,
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pub max: Option<T>,
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@ -38,7 +38,7 @@ pub enum TransactionError {
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InvalidGasLimit(OutOfBounds<U256>),
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}
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#[derive(Debug)]
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#[derive(Debug, PartialEq, Eq)]
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pub enum BlockError {
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TooManyUncles(OutOfBounds<usize>),
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UncleWrongGeneration,
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@ -51,14 +51,6 @@ impl Engine for Ethash {
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if header.difficulty < min_difficulty {
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return Err(From::from(BlockError::InvalidDifficulty(Mismatch { expected: min_difficulty, found: header.difficulty })))
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}
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let min_gas_limit = decode(self.spec().engine_params.get("minGasLimit").unwrap());
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if header.gas_limit < min_gas_limit {
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return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: Some(min_gas_limit), max: None, found: header.gas_limit })));
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}
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let maximum_extra_data_size = self.maximum_extra_data_size();
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if header.number != 0 && header.extra_data.len() > maximum_extra_data_size {
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return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds { min: None, max: Some(maximum_extra_data_size), found: header.extra_data.len() })));
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}
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// TODO: Verify seal (quick)
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Ok(())
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}
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@ -10,7 +10,7 @@ pub type BlockNumber = u64;
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/// which is non-specific.
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///
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/// Doesn't do all that much on its own.
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#[derive(Debug)]
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#[derive(Debug, Clone)]
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pub struct Header {
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// TODO: make all private.
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pub parent_hash: H256,
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@ -1,5 +1,5 @@
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use util::*;
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use blockchain::BlockChain;
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use blockchain::*;
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use views::{BlockView};
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use verification::*;
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use error::*;
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@ -7,17 +7,17 @@
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use common::*;
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use engine::Engine;
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use blockchain::BlockChain;
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use blockchain::*;
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/// Phase 1 quick block verification. Only does checks that are cheap. Operates on a single block
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pub fn verify_block_basic(bytes: &[u8], engine: &Engine) -> Result<(), Error> {
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let block = BlockView::new(bytes);
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let header = block.header();
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try!(verify_header(&header));
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try!(verify_header(&header, engine));
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try!(verify_block_integrity(bytes, &header.transactions_root, &header.uncles_hash));
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try!(engine.verify_block_basic(&header, Some(bytes)));
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for u in Rlp::new(bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) {
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try!(verify_header(&u));
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try!(verify_header(&u, engine));
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try!(engine.verify_block_basic(&u, None));
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}
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Ok(())
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@ -37,7 +37,7 @@ pub fn verify_block_unordered(bytes: &[u8], engine: &Engine) -> Result<(), Error
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}
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/// Phase 3 verification. Check block information against parent and uncles.
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pub fn verify_block_final(bytes: &[u8], engine: &Engine, bc: &BlockChain) -> Result<(), Error> {
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pub fn verify_block_final<BC>(bytes: &[u8], engine: &Engine, bc: &BC) -> Result<(), Error> where BC: BlockProvider {
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let block = BlockView::new(bytes);
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let header = block.header();
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let parent = try!(bc.block_header(&header.parent_hash).ok_or::<Error>(From::from(BlockError::UnknownParent(header.parent_hash.clone()))));
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@ -67,9 +67,8 @@ pub fn verify_block_final(bytes: &[u8], engine: &Engine, bc: &BlockChain) -> Res
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}
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for uncle in Rlp::new(bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) {
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let uncle_parent = try!(bc.block_header(&uncle.parent_hash).ok_or::<Error>(From::from(BlockError::UnknownUncleParent(uncle.parent_hash.clone()))));
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if excluded.contains(&uncle_parent.hash()) {
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return Err(From::from(BlockError::UncleInChain(uncle_parent.hash())))
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if excluded.contains(&uncle.hash()) {
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return Err(From::from(BlockError::UncleInChain(uncle.hash())))
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}
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// m_currentBlock.number() - uncle.number() m_cB.n - uP.n()
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@ -99,13 +98,20 @@ pub fn verify_block_final(bytes: &[u8], engine: &Engine, bc: &BlockChain) -> Res
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// cB.p^7 -------------/
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// cB.p^8
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let mut expected_uncle_parent = header.parent_hash.clone();
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let uncle_parent = try!(bc.block_header(&uncle.parent_hash).ok_or::<Error>(From::from(BlockError::UnknownUncleParent(uncle.parent_hash.clone()))));
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for _ in 0..depth {
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expected_uncle_parent = bc.block_details(&expected_uncle_parent).unwrap().parent;
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match bc.block_details(&expected_uncle_parent) {
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Some(details) => {
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expected_uncle_parent = details.parent;
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},
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None => break
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}
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}
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if expected_uncle_parent != uncle_parent.hash() {
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return Err(From::from(BlockError::UncleParentNotInChain(uncle_parent.hash())));
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}
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try!(verify_parent(&uncle, &uncle_parent));
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try!(engine.verify_block_final(&uncle, &uncle_parent, Some(bytes)));
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}
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}
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@ -113,13 +119,21 @@ pub fn verify_block_final(bytes: &[u8], engine: &Engine, bc: &BlockChain) -> Res
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}
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/// Check basic header parameters.
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fn verify_header(header: &Header) -> Result<(), Error> {
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if header.number > From::from(BlockNumber::max_value()) {
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fn verify_header(header: &Header, engine: &Engine) -> Result<(), Error> {
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if header.number >= From::from(BlockNumber::max_value()) {
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return Err(From::from(BlockError::InvalidNumber(OutOfBounds { max: Some(From::from(BlockNumber::max_value())), min: None, found: header.number })))
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}
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if header.gas_used > header.gas_limit {
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return Err(From::from(BlockError::TooMuchGasUsed(OutOfBounds { max: Some(header.gas_limit), min: None, found: header.gas_used })));
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}
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let min_gas_limit = decode(engine.spec().engine_params.get("minGasLimit").unwrap());
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if header.gas_limit < min_gas_limit {
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return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: Some(min_gas_limit), max: None, found: header.gas_limit })));
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}
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let maximum_extra_data_size = engine.maximum_extra_data_size();
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if header.number != 0 && header.extra_data.len() > maximum_extra_data_size {
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return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds { min: None, max: Some(maximum_extra_data_size), found: header.extra_data.len() })));
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}
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Ok(())
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}
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@ -152,3 +166,235 @@ fn verify_block_integrity(block: &[u8], transactions_root: &H256, uncles_hash: &
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Ok(())
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}
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#[cfg(test)]
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mod tests {
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use util::*;
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use header::*;
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use verification::*;
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use extras::*;
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use error::*;
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use error::BlockError::*;
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use views::*;
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use blockchain::*;
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use ethereum;
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fn create_test_block(header: &Header) -> Bytes {
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let mut rlp = RlpStream::new_list(3);
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rlp.append(header);
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rlp.append_raw(&rlp::EMPTY_LIST_RLP, 1);
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rlp.append_raw(&rlp::EMPTY_LIST_RLP, 1);
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rlp.out()
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}
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fn create_test_block_with_data(header: &Header, transactions: &[Bytes], uncles: &[Header]) -> Bytes {
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let mut rlp = RlpStream::new_list(3);
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rlp.append(header);
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rlp.append_list(transactions.len());
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for t in transactions {
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rlp.append_raw(t, 1);
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}
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rlp.append_list(uncles.len());
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for h in uncles {
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rlp.append(h);
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}
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rlp.out()
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}
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fn check_ok(result: Result<(), Error>) {
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result.unwrap_or_else(|e| panic!("Block verification failed: {:?}", e));
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}
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fn check_fail(result: Result<(), Error>, e: BlockError) {
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match result {
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Err(Error::Block(ref error)) if *error == e => (),
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Err(other) => panic!("Block verification failed.\nExpected: {:?}\nGot: {:?}", e, other),
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Ok(_) => panic!("Block verification failed.\nExpected: {:?}\nGot: Ok", e),
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}
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}
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struct TestBlockChain {
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blocks: HashMap<H256, Bytes>,
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numbers: HashMap<BlockNumber, H256>,
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}
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impl TestBlockChain {
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pub fn new() -> TestBlockChain {
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TestBlockChain {
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blocks: HashMap::new(),
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numbers: HashMap::new(),
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}
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}
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pub fn insert(&mut self, bytes: Bytes) {
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let number = BlockView::new(&bytes).header_view().number();
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let hash = BlockView::new(&bytes).header_view().sha3();
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self.blocks.insert(hash.clone(), bytes);
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self.numbers.insert(number, hash.clone());
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}
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}
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impl BlockProvider for TestBlockChain {
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fn is_known(&self, hash: &H256) -> bool {
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self.blocks.contains_key(hash)
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}
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/// Get raw block data
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fn block(&self, hash: &H256) -> Option<Bytes> {
|
||||
self.blocks.get(hash).map(|b| b.clone())
|
||||
}
|
||||
|
||||
/// Get the familial details concerning a block.
|
||||
fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
|
||||
self.blocks.get(hash).map(|bytes| {
|
||||
let header = BlockView::new(bytes).header();
|
||||
BlockDetails {
|
||||
number: header.number,
|
||||
total_difficulty: header.difficulty,
|
||||
parent: header.parent_hash,
|
||||
children: Vec::new(),
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
/// Get the hash of given block's number.
|
||||
fn block_hash(&self, index: BlockNumber) -> Option<H256> {
|
||||
self.numbers.get(&index).map(|h| h.clone())
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_verify_block() {
|
||||
// Test against morden
|
||||
let mut good = Header::new();
|
||||
let spec = ethereum::new_morden();
|
||||
let engine = spec.to_engine().unwrap();
|
||||
|
||||
let min_gas_limit = decode(engine.spec().engine_params.get("minGasLimit").unwrap());
|
||||
let min_difficulty = decode(engine.spec().engine_params.get("minimumDifficulty").unwrap());
|
||||
good.gas_limit = min_gas_limit;
|
||||
good.difficulty = min_difficulty;
|
||||
good.timestamp = 40;
|
||||
good.number = 10;
|
||||
|
||||
let good_transactions = vec![ vec![ 1u8 ], vec![ 2u8 ] ]; // TODO: proper transactions
|
||||
|
||||
let diff_inc = U256::from(0x40);
|
||||
|
||||
let mut parent6 = good.clone();
|
||||
parent6.number = 6;
|
||||
let mut parent7 = good.clone();
|
||||
parent7.number = 7;
|
||||
parent7.parent_hash = parent6.hash();
|
||||
parent7.difficulty = parent6.difficulty + diff_inc;
|
||||
parent7.timestamp = parent6.timestamp + 10;
|
||||
let mut parent8 = good.clone();
|
||||
parent8.number = 8;
|
||||
parent8.parent_hash = parent7.hash();
|
||||
parent8.difficulty = parent7.difficulty + diff_inc;
|
||||
parent8.timestamp = parent7.timestamp + 10;
|
||||
|
||||
let mut good_uncle1 = good.clone();
|
||||
good_uncle1.number = 9;
|
||||
good_uncle1.parent_hash = parent8.hash();
|
||||
good_uncle1.difficulty = parent8.difficulty + diff_inc;
|
||||
good_uncle1.timestamp = parent8.timestamp + 10;
|
||||
good_uncle1.extra_data.push(1u8);
|
||||
|
||||
let mut good_uncle2 = good.clone();
|
||||
good_uncle2.number = 8;
|
||||
good_uncle2.parent_hash = parent7.hash();
|
||||
good_uncle2.difficulty = parent7.difficulty + diff_inc;
|
||||
good_uncle2.timestamp = parent7.timestamp + 10;
|
||||
good_uncle2.extra_data.push(2u8);
|
||||
|
||||
let good_uncles = vec![ good_uncle1.clone(), good_uncle2.clone() ];
|
||||
let mut uncles_rlp = RlpStream::new();
|
||||
uncles_rlp.append(&good_uncles);
|
||||
let good_uncles_hash = uncles_rlp.as_raw().sha3();
|
||||
let good_transactions_root = ordered_trie_root(good_transactions.clone());
|
||||
|
||||
let mut parent = good.clone();
|
||||
parent.number = 9;
|
||||
parent.timestamp = parent8.timestamp + 10;
|
||||
parent.parent_hash = parent8.hash();
|
||||
parent.difficulty = parent8.difficulty + diff_inc;
|
||||
|
||||
good.parent_hash = parent.hash();
|
||||
good.difficulty = parent.difficulty + diff_inc;
|
||||
good.timestamp = parent.timestamp + 10;
|
||||
|
||||
let mut bc = TestBlockChain::new();
|
||||
bc.insert(create_test_block(&good));
|
||||
bc.insert(create_test_block(&parent));
|
||||
bc.insert(create_test_block(&parent6));
|
||||
bc.insert(create_test_block(&parent7));
|
||||
bc.insert(create_test_block(&parent8));
|
||||
|
||||
check_ok(verify_block_basic(&create_test_block(&good), engine.deref()));
|
||||
|
||||
let mut header = good.clone();
|
||||
header.transactions_root = good_transactions_root.clone();
|
||||
header.uncles_hash = good_uncles_hash.clone();
|
||||
check_ok(verify_block_basic(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref()));
|
||||
|
||||
header.gas_limit = min_gas_limit - From::from(1);
|
||||
check_fail(verify_block_basic(&create_test_block(&header), engine.deref()),
|
||||
InvalidGasLimit(OutOfBounds { min: Some(min_gas_limit), max: None, found: header.gas_limit }));
|
||||
|
||||
header = good.clone();
|
||||
header.number = BlockNumber::max_value();
|
||||
check_fail(verify_block_basic(&create_test_block(&header), engine.deref()),
|
||||
InvalidNumber(OutOfBounds { max: Some(BlockNumber::max_value()), min: None, found: header.number }));
|
||||
|
||||
header = good.clone();
|
||||
header.gas_used = header.gas_limit + From::from(1);
|
||||
check_fail(verify_block_basic(&create_test_block(&header), engine.deref()),
|
||||
TooMuchGasUsed(OutOfBounds { max: Some(header.gas_limit), min: None, found: header.gas_used }));
|
||||
|
||||
header = good.clone();
|
||||
header.extra_data.resize(engine.maximum_extra_data_size() + 1, 0u8);
|
||||
check_fail(verify_block_basic(&create_test_block(&header), engine.deref()),
|
||||
ExtraDataOutOfBounds(OutOfBounds { max: Some(engine.maximum_extra_data_size()), min: None, found: header.extra_data.len() }));
|
||||
|
||||
header = good.clone();
|
||||
header.extra_data.resize(engine.maximum_extra_data_size() + 1, 0u8);
|
||||
check_fail(verify_block_basic(&create_test_block(&header), engine.deref()),
|
||||
ExtraDataOutOfBounds(OutOfBounds { max: Some(engine.maximum_extra_data_size()), min: None, found: header.extra_data.len() }));
|
||||
|
||||
header = good.clone();
|
||||
header.uncles_hash = good_uncles_hash.clone();
|
||||
check_fail(verify_block_basic(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref()),
|
||||
InvalidTransactionsRoot(Mismatch { expected: good_transactions_root.clone(), found: header.transactions_root }));
|
||||
|
||||
header = good.clone();
|
||||
header.transactions_root = good_transactions_root.clone();
|
||||
check_fail(verify_block_basic(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref()),
|
||||
InvalidUnclesHash(Mismatch { expected: good_uncles_hash.clone(), found: header.uncles_hash }));
|
||||
|
||||
check_ok(verify_block_final(&create_test_block(&good), engine.deref(), &bc));
|
||||
check_ok(verify_block_final(&create_test_block_with_data(&good, &good_transactions, &good_uncles), engine.deref(), &bc));
|
||||
|
||||
header = good.clone();
|
||||
header.parent_hash = H256::random();
|
||||
check_fail(verify_block_final(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref(), &bc),
|
||||
UnknownParent(header.parent_hash));
|
||||
|
||||
header = good.clone();
|
||||
header.timestamp = 10;
|
||||
check_fail(verify_block_final(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref(), &bc),
|
||||
InvalidTimestamp(OutOfBounds { max: None, min: Some(parent.timestamp + 1), found: header.timestamp }));
|
||||
|
||||
header = good.clone();
|
||||
header.number = 9;
|
||||
check_fail(verify_block_final(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref(), &bc),
|
||||
InvalidNumber(OutOfBounds { max: None, min: Some(parent.number + 1), found: header.number }));
|
||||
|
||||
header = good.clone();
|
||||
let mut bad_uncles = good_uncles.clone();
|
||||
bad_uncles.push(good_uncle1.clone());
|
||||
check_fail(verify_block_final(&create_test_block_with_data(&header, &good_transactions, &bad_uncles), engine.deref(), &bc),
|
||||
TooManyUncles(OutOfBounds { max: Some(engine.maximum_uncle_count()), min: None, found: bad_uncles.len() }));
|
||||
|
||||
// TODO: some additional uncle checks
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user