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Merge pull request #63 from gavofyork/ethash

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Block enactment (including test)
This commit is contained in:
Arkadiy Paronyan 2016-01-10 23:40:50 +01:00
commit 0d5aaa69fa
10 changed files with 160 additions and 65 deletions
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1
Cargo.toml
View File

@ -15,6 +15,7 @@ flate2 = "0.2"
rocksdb = "0.2.1"
heapsize = "0.2.0"
rust-crypto = "0.2.34"
time = "0.1"
evmjit = { path = "rust-evmjit", optional = true }

96
src/block.rs
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@ -21,7 +21,16 @@ pub struct Block {
uncles: Vec<Header>,
}
/// A set of references to `Block` fields that are publicly accessible.
pub struct BlockRefMut<'a> {
pub header: &'a Header,
pub state: &'a mut State,
pub archive: &'a Vec<Entry>,
pub uncles: &'a Vec<Header>,
}
impl Block {
/// Create a new block from the given `state`.
fn new(state: State) -> Block {
Block {
header: Header::new(),
@ -32,7 +41,15 @@ impl Block {
}
}
pub fn state_mut(&mut self) -> &mut State { &mut self.state }
/// Get a structure containing individual references to all public fields.
pub fn fields(&mut self) -> BlockRefMut {
BlockRefMut {
header: &self.header,
state: &mut self.state,
archive: &self.archive,
uncles: &self.uncles,
}
}
}
/// Trait for a object that is_a `Block`.
@ -61,18 +78,18 @@ impl IsBlock for Block {
///
/// It's a bit like a Vec<Transaction>, eccept that whenever a transaction is pushed, we execute it and
/// maintain the system `state()`. We also archive execution receipts in preparation for later block creation.
pub struct OpenBlock<'engine> {
pub struct OpenBlock<'x, 'y> {
block: Block,
engine: &'engine Engine,
last_hashes: LastHashes,
engine: &'x Engine,
last_hashes: &'y LastHashes,
}
/// Just like OpenBlock, except that we've applied `Engine::on_close_block`, finished up the non-seal header fields,
/// and collected the uncles.
///
/// There is no function available to push a transaction. If you want that you'll need to `reopen()` it.
pub struct ClosedBlock<'engine> {
open_block: OpenBlock<'engine>,
pub struct ClosedBlock<'x, 'y> {
open_block: OpenBlock<'x, 'y>,
uncle_bytes: Bytes,
}
@ -84,9 +101,9 @@ pub struct SealedBlock {
uncle_bytes: Bytes,
}
impl<'engine> OpenBlock<'engine> {
impl<'x, 'y> OpenBlock<'x, 'y> {
/// Create a new OpenBlock ready for transaction pushing.
pub fn new<'a>(engine: &'a Engine, db: OverlayDB, parent: &Header, last_hashes: LastHashes, author: Address, extra_data: Bytes) -> OpenBlock<'a> {
pub fn new<'a, 'b>(engine: &'a Engine, db: OverlayDB, parent: &Header, last_hashes: &'b LastHashes, author: Address, extra_data: Bytes) -> OpenBlock<'a, 'b> {
let mut r = OpenBlock {
block: Block::new(State::from_existing(db, parent.state_root.clone(), engine.account_start_nonce())),
engine: engine,
@ -95,6 +112,8 @@ impl<'engine> OpenBlock<'engine> {
r.block.header.set_author(author);
r.block.header.set_extra_data(extra_data);
r.block.header.set_timestamp_now();
engine.populate_from_parent(&mut r.block.header, parent);
engine.on_new_block(&mut r.block);
r
@ -103,6 +122,9 @@ impl<'engine> OpenBlock<'engine> {
/// Alter the author for the block.
pub fn set_author(&mut self, author: Address) { self.block.header.set_author(author); }
/// Alter the timestamp of the block.
pub fn set_timestamp(&mut self, timestamp: u64) { self.block.header.set_timestamp(timestamp); }
/// Alter the extra_data for the block.
pub fn set_extra_data(&mut self, extra_data: Bytes) -> Result<(), BlockError> {
if extra_data.len() > self.engine.maximum_extra_data_size() {
@ -131,9 +153,9 @@ impl<'engine> OpenBlock<'engine> {
pub fn env_info(&self) -> EnvInfo {
// TODO: memoise.
EnvInfo {
number: self.block.header.number.clone(),
number: self.block.header.number,
author: self.block.header.author.clone(),
timestamp: self.block.header.timestamp.clone(),
timestamp: self.block.header.timestamp,
difficulty: self.block.header.difficulty.clone(),
last_hashes: self.last_hashes.clone(),
gas_used: self.block.archive.last().map(|t| t.receipt.gas_used).unwrap_or(U256::from(0)),
@ -157,7 +179,7 @@ impl<'engine> OpenBlock<'engine> {
}
/// Turn this into a `ClosedBlock`. A BlockChain must be provided in order to figure out the uncles.
pub fn close(self) -> ClosedBlock<'engine> {
pub fn close(self) -> ClosedBlock<'x, 'y> {
let mut s = self;
s.engine.on_close_block(&mut s.block);
s.block.header.transactions_root = ordered_trie_root(s.block.archive.iter().map(|ref e| e.transaction.rlp_bytes()).collect());
@ -173,16 +195,16 @@ impl<'engine> OpenBlock<'engine> {
}
}
impl<'engine> IsBlock for OpenBlock<'engine> {
impl<'x, 'y> IsBlock for OpenBlock<'x, 'y> {
fn block(&self) -> &Block { &self.block }
}
impl<'engine> IsBlock for ClosedBlock<'engine> {
impl<'x, 'y> IsBlock for ClosedBlock<'x, 'y> {
fn block(&self) -> &Block { &self.open_block.block }
}
impl<'engine> ClosedBlock<'engine> {
fn new<'a>(open_block: OpenBlock<'a>, uncle_bytes: Bytes) -> ClosedBlock<'a> {
impl<'x, 'y> ClosedBlock<'x, 'y> {
fn new<'a, 'b>(open_block: OpenBlock<'a, 'b>, uncle_bytes: Bytes) -> ClosedBlock<'a, 'b> {
ClosedBlock {
open_block: open_block,
uncle_bytes: uncle_bytes,
@ -205,7 +227,7 @@ impl<'engine> ClosedBlock<'engine> {
}
/// Turn this back into an `OpenBlock`.
pub fn reopen(self) -> OpenBlock<'engine> { self.open_block }
pub fn reopen(self) -> OpenBlock<'x, 'y> { self.open_block }
}
impl SealedBlock {
@ -217,13 +239,26 @@ impl SealedBlock {
for e in self.block.archive.iter() { e.transaction.rlp_append(&mut block_rlp); }
block_rlp.append_raw(&self.uncle_bytes, 1);
block_rlp.out()
}
}
/// Drop this object and return the underlieing database.
pub fn drain(self) -> OverlayDB { self.block.state.drop().1 }
}
impl IsBlock for SealedBlock {
fn block(&self) -> &Block { &self.block }
}
pub fn enact(rlp_bytes: &[u8], engine: &Engine, db: OverlayDB, parent: &Header, last_hashes: &LastHashes) -> Result<SealedBlock, Error> {
let block = BlockView::new(rlp_bytes);
let header = block.header_view();
let mut b = OpenBlock::new(engine, db, parent, last_hashes, header.author(), header.extra_data());
b.set_timestamp(header.timestamp());
for t in block.transactions().into_iter() { try!(b.push_transaction(t, None)); }
for u in block.uncles().into_iter() { try!(b.push_uncle(u)); }
Ok(try!(b.close().seal(header.seal())))
}
#[test]
fn open_block() {
use spec::*;
@ -231,7 +266,30 @@ fn open_block() {
let genesis_header = engine.spec().genesis_header();
let mut db = OverlayDB::new_temp();
engine.spec().ensure_db_good(&mut db);
let b = OpenBlock::new(engine.deref(), db, &genesis_header, vec![genesis_header.hash()], Address::zero(), vec![]);
let last_hashes = vec![genesis_header.hash()];
let b = OpenBlock::new(engine.deref(), db, &genesis_header, &last_hashes, Address::zero(), vec![]);
let b = b.close();
let _ = b.seal(vec![]);
}
}
#[test]
fn enact_block() {
use spec::*;
let engine = Spec::new_test().to_engine().unwrap();
let genesis_header = engine.spec().genesis_header();
let mut db = OverlayDB::new_temp();
engine.spec().ensure_db_good(&mut db);
let b = OpenBlock::new(engine.deref(), db, &genesis_header, &vec![genesis_header.hash()], Address::zero(), vec![]).close().seal(vec![]).unwrap();
let orig_bytes = b.rlp_bytes();
let orig_db = b.drain();
let mut db = OverlayDB::new_temp();
engine.spec().ensure_db_good(&mut db);
let e = enact(&orig_bytes, engine.deref(), db, &genesis_header, &vec![genesis_header.hash()]).unwrap();
assert_eq!(e.rlp_bytes(), orig_bytes);
let db = e.drain();
assert_eq!(orig_db.keys(), db.keys());
}

55
src/blockchain.rs
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@ -33,7 +33,7 @@ pub struct CacheSize {
/// Information about best block gathered together
struct BestBlock {
pub hash: H256,
pub number: U256,
pub number: usize,
pub total_difficulty: U256
}
@ -41,7 +41,7 @@ impl BestBlock {
fn new() -> BestBlock {
BestBlock {
hash: H256::new(),
number: U256::from(0),
number: 0usize,
total_difficulty: U256::from(0)
}
}
@ -58,7 +58,7 @@ pub struct BlockChain {
// extra caches
block_details: RefCell<HashMap<H256, BlockDetails>>,
block_hashes: RefCell<HashMap<U256, H256>>,
block_hashes: RefCell<HashMap<usize, H256>>,
transaction_addresses: RefCell<HashMap<H256, TransactionAddress>>,
block_logs: RefCell<HashMap<H256, BlockLogBlooms>>,
blocks_blooms: RefCell<HashMap<H256, BlocksBlooms>>,
@ -92,7 +92,7 @@ impl BlockChain {
/// 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(&U256::from(0u8)).unwrap());
/// assert_eq!(bc.genesis_hash(), bc.block_hash(0).unwrap());
/// }
/// ```
pub fn new(genesis: &[u8], path: &Path) -> BlockChain {
@ -336,9 +336,9 @@ impl BlockChain {
// it is a fork
i if i > 1 => {
let ancestor_number = self.block_number(&route.ancestor).unwrap();
let start_number = ancestor_number + U256::from(1u8);
let start_number = ancestor_number + 1;
for (index, hash) in route.blocks.iter().skip(route.index).enumerate() {
batch.put_extras(&(start_number + U256::from(index as u64)), hash);
batch.put_extras(&(start_number + index), hash);
}
},
// route.blocks.len() could be 0 only if inserted block is best block,
@ -371,7 +371,7 @@ impl BlockChain {
/// Returns reference to genesis hash.
pub fn genesis_hash(&self) -> H256 {
self.block_hash(&U256::from(0u8)).expect("Genesis hash should always exist")
self.block_hash(0).expect("Genesis hash should always exist")
}
/// Get the partial-header of a block.
@ -409,8 +409,8 @@ impl BlockChain {
}
/// Get the hash of given block's number.
pub fn block_hash(&self, hash: &U256) -> Option<H256> {
self.query_extras(hash, &self.block_hashes)
pub fn block_hash(&self, index: usize) -> Option<H256> {
self.query_extras(&index, &self.block_hashes)
}
/// Get best block hash.
@ -419,7 +419,7 @@ impl BlockChain {
}
/// Get best block number.
pub fn best_block_number(&self) -> U256 {
pub fn best_block_number(&self) -> usize {
self.best_block.borrow().number
}
@ -429,7 +429,7 @@ impl BlockChain {
}
/// Get the number of given block's hash.
pub fn block_number(&self, hash: &H256) -> Option<U256> {
pub fn block_number(&self, hash: &H256) -> Option<usize> {
self.block(hash).map(|bytes| BlockView::new(&bytes).header_view().number())
}
@ -520,7 +520,6 @@ mod tests {
use std::str::FromStr;
use rustc_serialize::hex::FromHex;
use util::hash::*;
use util::uint::*;
use blockchain::*;
#[test]
@ -535,10 +534,10 @@ mod tests {
let genesis_hash = H256::from_str("3caa2203f3d7c136c0295ed128a7d31cea520b1ca5e27afe17d0853331798942").unwrap();
assert_eq!(bc.genesis_hash(), genesis_hash.clone());
assert_eq!(bc.best_block_number(), U256::from(0u8));
assert_eq!(bc.best_block_number(), 0);
assert_eq!(bc.best_block_hash(), genesis_hash.clone());
assert_eq!(bc.block_hash(&U256::from(0u8)), Some(genesis_hash.clone()));
assert_eq!(bc.block_hash(&U256::from(1u8)), None);
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();
@ -547,13 +546,13 @@ mod tests {
let first_hash = H256::from_str("a940e5af7d146b3b917c953a82e1966b906dace3a4e355b5b0a4560190357ea1").unwrap();
assert_eq!(bc.block_hash(&U256::from(0u8)), Some(genesis_hash.clone()));
assert_eq!(bc.best_block_number(), U256::from(1u8));
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(&U256::from(1u8)), Some(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(&U256::from(2u8)), None);
assert_eq!(bc.block_hash(2), None);
}
#[test]
@ -583,16 +582,16 @@ mod tests {
bc.insert_block(&b3b);
assert_eq!(bc.best_block_hash(), best_block_hash);
assert_eq!(bc.block_number(&genesis_hash).unwrap(), U256::from(0));
assert_eq!(bc.block_number(&b1_hash).unwrap(), U256::from(1));
assert_eq!(bc.block_number(&b2_hash).unwrap(), U256::from(2));
assert_eq!(bc.block_number(&b3a_hash).unwrap(), U256::from(3));
assert_eq!(bc.block_number(&b3b_hash).unwrap(), U256::from(3));
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(&U256::from(0)).unwrap(), genesis_hash);
assert_eq!(bc.block_hash(&U256::from(1)).unwrap(), b1_hash);
assert_eq!(bc.block_hash(&U256::from(2)).unwrap(), b2_hash);
assert_eq!(bc.block_hash(&U256::from(3)).unwrap(), b3a_hash);
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());

4
src/env_info.rs
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@ -7,11 +7,11 @@ pub type LastHashes = Vec<H256>;
/// Information concerning the execution environment for a message-call/contract-creation.
pub struct EnvInfo {
/// The block number.
pub number: U256,
pub number: usize,
/// The block author.
pub author: Address,
/// The block timestamp.
pub timestamp: U256,
pub timestamp: u64,
/// The block difficulty.
pub difficulty: U256,
/// The block gas limit.

29
src/ethereum/ethash.rs
View File

@ -17,13 +17,31 @@ impl Ethash {
impl Engine for Ethash {
fn name(&self) -> &str { "Ethash" }
fn version(&self) -> SemanticVersion { SemanticVersion::new(1, 0, 0) }
// Two fields - mix
fn seal_fields(&self) -> usize { 2 }
// Two empty data items in RLP.
fn seal_rlp(&self) -> Bytes { encode(&H64::new()) }
/// Additional engine-specific information for the user/developer concerning `header`.
fn extra_info(&self, _header: &Header) -> HashMap<String, String> { HashMap::new() }
fn spec(&self) -> &Spec { &self.spec }
fn evm_schedule(&self, _env_info: &EnvInfo) -> EvmSchedule { EvmSchedule::new_frontier() }
/// Apply the block reward on finalisation of the block.
/// This assumes that all uncles are valid uncles (i.e. of at least one generation before the current).
fn on_close_block(&self, block: &mut Block) {
let a = block.header().author.clone();
block.state_mut().add_balance(&a, &decode(&self.spec().engine_params.get("blockReward").unwrap()));
let reward = self.spec().engine_params.get("blockReward").map(|a| decode(&a)).unwrap_or(U256::from(0u64));
let fields = block.fields();
// Bestow block reward
fields.state.add_balance(&fields.header.author, &(reward + reward / U256::from(32) * U256::from(fields.uncles.len())));
// Bestow uncle rewards
let current_number = fields.header.number();
for u in fields.uncles.iter() {
fields.state.add_balance(u.author(), &(reward * U256::from((8 + u.number() - current_number) / 8)));
}
}
}
@ -34,7 +52,8 @@ fn on_close_block() {
let genesis_header = engine.spec().genesis_header();
let mut db = OverlayDB::new_temp();
engine.spec().ensure_db_good(&mut db);
let b = OpenBlock::new(engine.deref(), db, &genesis_header, vec![genesis_header.hash()], Address::zero(), vec![]);
let last_hashes = vec![genesis_header.hash()];
let b = OpenBlock::new(engine.deref(), db, &genesis_header, &last_hashes, Address::zero(), vec![]);
let b = b.close();
assert_eq!(b.state().balance(&Address::zero()), U256::from_str("4563918244F40000").unwrap());
}
assert_eq!(b.state().balance(&Address::zero()), U256::from_str("4563918244f40000").unwrap());
}

9
src/extras.rs
View File

@ -74,6 +74,13 @@ impl ExtrasSliceConvertable for U256 {
}
}
// NICE: make less horrible.
impl ExtrasSliceConvertable for usize {
fn to_extras_slice(&self, i: ExtrasIndex) -> H264 {
U256::from(*self).to_extras_slice(i)
}
}
/// Types implementing this trait can be indexed in extras database
pub trait ExtrasIndexable {
fn extras_index() -> ExtrasIndex;
@ -88,7 +95,7 @@ impl ExtrasIndexable for H256 {
/// Familial details concerning a block
#[derive(Debug, Clone)]
pub struct BlockDetails {
pub number: U256,
pub number: usize,
pub total_difficulty: U256,
pub parent: H256,
pub children: Vec<H256>

18
src/header.rs
View File

@ -1,5 +1,6 @@
use util::*;
use basic_types::*;
use time::now_utc;
/// A block header.
///
@ -11,8 +12,8 @@ use basic_types::*;
pub struct Header {
// TODO: make all private.
pub parent_hash: H256,
pub timestamp: U256,
pub number: U256,
pub timestamp: u64,
pub number: usize,
pub author: Address,
pub transactions_root: H256,
@ -41,8 +42,8 @@ impl Header {
pub fn new() -> Header {
Header {
parent_hash: ZERO_H256.clone(),
timestamp: BAD_U256.clone(),
number: ZERO_U256.clone(),
timestamp: 0,
number: 0,
author: ZERO_ADDRESS.clone(),
transactions_root: ZERO_H256.clone(),
@ -61,14 +62,23 @@ impl Header {
}
}
pub fn number(&self) -> usize { self.number }
pub fn timestamp(&self) -> u64 { self.timestamp }
pub fn author(&self) -> &Address { &self.author }
pub fn extra_data(&self) -> &Bytes { &self.extra_data }
pub fn seal(&self) -> &Vec<Bytes> { &self.seal }
// TODO: seal_at, set_seal_at &c.
pub fn set_number(&mut self, a: usize) { self.number = a; self.note_dirty(); }
pub fn set_timestamp(&mut self, a: u64) { self.timestamp = a; self.note_dirty(); }
pub fn set_timestamp_now(&mut self) { self.timestamp = now_utc().to_timespec().sec as u64; self.note_dirty(); }
pub fn set_author(&mut self, a: Address) { if a != self.author { self.author = a; self.note_dirty(); } }
pub fn set_extra_data(&mut self, a: Bytes) { if a != self.extra_data { self.extra_data = a; self.note_dirty(); } }
pub fn set_seal(&mut self, a: Vec<Bytes>) { self.seal = a; self.note_dirty(); }
/// Get the hash of this header (sha3 of the RLP).

1
src/lib.rs
View File

@ -78,6 +78,7 @@ extern crate flate2;
extern crate rocksdb;
extern crate heapsize;
extern crate crypto;
extern crate time;
extern crate env_logger;
#[cfg(feature = "jit" )]

8
src/spec.rs
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@ -60,7 +60,7 @@ pub struct Spec {
pub difficulty: U256,
pub gas_limit: U256,
pub gas_used: U256,
pub timestamp: U256,
pub timestamp: u64,
pub extra_data: Bytes,
pub genesis_state: HashMap<Address, Account>,
pub seal_fields: usize,
@ -92,8 +92,8 @@ impl Spec {
pub fn genesis_header(&self) -> Header {
Header {
parent_hash: self.parent_hash.clone(),
timestamp: self.timestamp.clone(),
number: U256::from(0u8),
timestamp: self.timestamp,
number: 0,
author: self.author.clone(),
transactions_root: SHA3_NULL_RLP.clone(),
uncles_hash: RlpStream::new_list(0).out().sha3(),
@ -181,7 +181,7 @@ impl Spec {
difficulty: U256::from_str(&genesis["difficulty"].as_string().unwrap()[2..]).unwrap(),
gas_limit: U256::from_str(&genesis["gasLimit"].as_string().unwrap()[2..]).unwrap(),
gas_used: U256::from(0u8),
timestamp: U256::from_str(&genesis["timestamp"].as_string().unwrap()[2..]).unwrap(),
timestamp: u64::from_str(&genesis["timestamp"].as_string().unwrap()[2..]).unwrap(),
extra_data: genesis["extraData"].as_string().unwrap()[2..].from_hex().unwrap(),
genesis_state: state,
seal_fields: seal_fields,

4
src/views.rs
View File

@ -113,7 +113,7 @@ impl<'a> HeaderView<'a> {
pub fn difficulty(&self) -> U256 { self.rlp.val_at(7) }
/// Returns block number.
pub fn number(&self) -> U256 { self.rlp.val_at(8) }
pub fn number(&self) -> usize { self.rlp.val_at(8) }
/// Returns block gas limit.
pub fn gas_limit(&self) -> U256 { self.rlp.val_at(9) }
@ -122,7 +122,7 @@ impl<'a> HeaderView<'a> {
pub fn gas_used(&self) -> U256 { self.rlp.val_at(10) }
/// Returns timestamp.
pub fn timestamp(&self) -> U256 { self.rlp.val_at(11) }
pub fn timestamp(&self) -> u64 { self.rlp.val_at(11) }
/// Returns block extra data.
pub fn extra_data(&self) -> Bytes { self.rlp.val_at(12) }