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simplify verification (#11249)

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* simplify verifier, remove NoopVerifier

* simplify verifier by removing Verifier trait and its only implementation

* remove unused imports

* fixed verification test failing to compile
This commit is contained in:
Marek Kotewicz 2019-11-12 15:05:49 +01:00 committed by Andronik Ordian
parent 9d55f0b4ab
commit db1ea1dcd8
7 changed files with 117 additions and 223 deletions
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17
ethcore/src/client/client.rs
View File

@ -133,8 +133,7 @@ use types::{
verification::{Unverified, VerificationQueueInfo as BlockQueueInfo},
};
use types::data_format::DataFormat;
use verification::{BlockQueue, Verifier};
use verification;
use verification::{self, BlockQueue};
use verification::queue::kind::BlockLike;
use vm::{CreateContractAddress, EnvInfo, LastHashes};
@ -162,9 +161,6 @@ struct Importer {
/// Lock used during block import
pub import_lock: Mutex<()>, // FIXME Maybe wrap the whole `Importer` instead?
/// Used to verify blocks
pub verifier: Box<dyn Verifier<Client>>,
/// Queue containing pending blocks
pub block_queue: BlockQueue<Client>,
@ -271,7 +267,6 @@ impl Importer {
Ok(Importer {
import_lock: Mutex::new(()),
verifier: verification::new(config.verifier_type.clone()),
block_queue,
miner,
ancient_verifier: AncientVerifier::new(engine.clone()),
@ -389,15 +384,15 @@ impl Importer {
let chain = client.chain.read();
// Verify Block Family
let verify_family_result = self.verifier.verify_block_family(
let verify_family_result = verification::verify_block_family(
&header,
&parent,
engine,
Some(verification::FullFamilyParams {
verification::FullFamilyParams {
block: &block,
block_provider: &**chain,
client
}),
},
);
if let Err(e) = verify_family_result {
@ -405,7 +400,7 @@ impl Importer {
return Err(e);
};
let verify_external_result = self.verifier.verify_block_external(&header, engine);
let verify_external_result = engine.verify_block_external(&header);
if let Err(e) = verify_external_result {
warn!(target: "client", "Stage 4 block verification failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
return Err(e.into());
@ -446,7 +441,7 @@ impl Importer {
}
// Final Verification
if let Err(e) = self.verifier.verify_block_final(&header, &locked_block.header) {
if let Err(e) = verification::verify_block_final(&header, &locked_block.header) {
warn!(target: "client", "Stage 5 block verification failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
return Err(e.into());
}

50
ethcore/verification/src/canon_verifier.rs
View File

@ -1,50 +0,0 @@
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity Ethereum.
// Parity Ethereum 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 Ethereum 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 Ethereum. If not, see <http://www.gnu.org/licenses/>.
//! Canonical verifier.
use call_contract::CallContract;
use client_traits::BlockInfo;
use engine::Engine;
use common_types::{
header::Header,
errors::EthcoreError as Error,
};
use super::Verifier;
use super::verification;
/// A canonical verifier -- this does full verification.
pub struct CanonVerifier;
impl<C: BlockInfo + CallContract> Verifier<C> for CanonVerifier {
fn verify_block_family(
&self,
header: &Header,
parent: &Header,
engine: &dyn Engine,
do_full: Option<verification::FullFamilyParams<C>>,
) -> Result<(), Error> {
verification::verify_block_family(header, parent, engine, do_full)
}
fn verify_block_final(&self, expected: &Header, got: &Header) -> Result<(), Error> {
verification::verify_block_final(expected, got)
}
fn verify_block_external(&self, header: &Header, engine: &dyn Engine) -> Result<(), Error> {
engine.verify_block_external(header)
}
}

24
ethcore/verification/src/lib.rs
View File

@ -16,8 +16,6 @@
//! Block verification utilities.
use call_contract::CallContract;
use client_traits::BlockInfo;
// The MallocSizeOf derive looks for this in the root
use parity_util_mem as malloc_size_of;
@ -25,20 +23,13 @@ use parity_util_mem as malloc_size_of;
pub mod verification;
#[cfg(not(feature = "bench" ))]
mod verification;
mod verifier;
pub mod queue;
mod canon_verifier;
mod noop_verifier;
#[cfg(any(test, feature = "bench" ))]
pub mod test_helpers;
pub use self::verification::FullFamilyParams;
pub use self::verifier::Verifier;
pub use self::verification::{FullFamilyParams, verify_block_family, verify_block_final};
pub use self::queue::{BlockQueue, Config as QueueConfig};
use self::canon_verifier::CanonVerifier;
use self::noop_verifier::NoopVerifier;
/// Verifier type.
#[derive(Debug, PartialEq, Clone)]
pub enum VerifierType {
@ -46,17 +37,6 @@ pub enum VerifierType {
Canon,
/// Verifies block normally, but skips seal verification.
CanonNoSeal,
/// Does not verify block at all.
/// Used in tests.
Noop,
}
/// Create a new verifier based on type.
pub fn new<C: BlockInfo + CallContract>(v: VerifierType) -> Box<dyn Verifier<C>> {
match v {
VerifierType::Canon | VerifierType::CanonNoSeal => Box::new(CanonVerifier),
VerifierType::Noop => Box::new(NoopVerifier),
}
}
impl VerifierType {
@ -64,7 +44,7 @@ impl VerifierType {
pub fn verifying_seal(&self) -> bool {
match *self {
VerifierType::Canon => true,
VerifierType::Noop | VerifierType::CanonNoSeal => false,
VerifierType::CanonNoSeal => false,
}
}
}

50
ethcore/verification/src/noop_verifier.rs
View File

@ -1,50 +0,0 @@
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity Ethereum.
// Parity Ethereum 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 Ethereum 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 Ethereum. If not, see <http://www.gnu.org/licenses/>.
//! No-op verifier.
use call_contract::CallContract;
use client_traits::BlockInfo;
use common_types::{
header::Header,
errors::EthcoreError as Error
};
use engine::Engine;
use super::{verification, Verifier};
/// A no-op verifier -- this will verify everything it's given immediately.
#[allow(dead_code)]
pub struct NoopVerifier;
impl<C: BlockInfo + CallContract> Verifier<C> for NoopVerifier {
fn verify_block_family(
&self,
_: &Header,
_t: &Header,
_: &dyn Engine,
_: Option<verification::FullFamilyParams<C>>
) -> Result<(), Error> {
Ok(())
}
fn verify_block_final(&self, _expected: &Header, _got: &Header) -> Result<(), Error> {
Ok(())
}
fn verify_block_external(&self, _header: &Header, _engine: &dyn Engine) -> Result<(), Error> {
Ok(())
}
}

7
ethcore/verification/src/queue/kind.rs
View File

@ -152,7 +152,7 @@ pub mod headers {
header::Header,
errors::EthcoreError as Error,
};
use crate::verification::verify_header_params;
use crate::verification::{verify_header_params, verify_header_time};
use ethereum_types::{H256, U256};
@ -171,7 +171,10 @@ pub mod headers {
type Verified = Header;
fn create(input: Self::Input, engine: &dyn Engine, check_seal: bool) -> Result<Self::Unverified, (Self::Input, Error)> {
match verify_header_params(&input, engine, true, check_seal) {
let res = verify_header_params(&input, engine, check_seal)
.and_then(|_| verify_header_time(&input));
match res {
Ok(_) => Ok(input),
Err(err) => Err((input, err))
}

146
ethcore/verification/src/verification.rs
View File

@ -29,7 +29,7 @@ use rlp::Rlp;
use triehash::ordered_trie_root;
use unexpected::{Mismatch, OutOfBounds};
use blockchain::*;
use blockchain::BlockProvider;
use call_contract::CallContract;
use client_traits::BlockInfo;
use engine::Engine;
@ -46,7 +46,8 @@ use time_utils::CheckedSystemTime;
/// Phase 1 quick block verification. Only does checks that are cheap. Operates on a single block
pub fn verify_block_basic(block: &Unverified, engine: &dyn Engine, check_seal: bool) -> Result<(), Error> {
verify_header_params(&block.header, engine, true, check_seal)?;
verify_header_params(&block.header, engine, check_seal)?;
verify_header_time(&block.header)?;
verify_block_integrity(block)?;
if check_seal {
@ -54,7 +55,7 @@ pub fn verify_block_basic(block: &Unverified, engine: &dyn Engine, check_seal: b
}
for uncle in &block.uncles {
verify_header_params(uncle, engine, false, check_seal)?;
verify_header_params(uncle, engine, check_seal)?;
if check_seal {
engine.verify_block_basic(uncle)?;
}
@ -123,16 +124,11 @@ pub fn verify_block_family<C: BlockInfo + CallContract>(
header: &Header,
parent: &Header,
engine: &dyn Engine,
do_full: Option<FullFamilyParams<C>>
params: FullFamilyParams<C>
) -> Result<(), Error> {
// TODO: verify timestamp
verify_parent(&header, &parent, engine)?;
engine.verify_block_family(&header, &parent)?;
let params = match do_full {
Some(x) => x,
None => return Ok(()),
};
verify_uncles(params.block, params.block_provider, engine)?;
for tx in &params.block.transactions {
@ -165,8 +161,7 @@ fn verify_uncles(block: &PreverifiedBlock, bc: &dyn BlockProvider, engine: &dyn
match bc.block_details(&hash) {
Some(details) => {
excluded.insert(details.parent);
let b = bc.block(&hash)
.expect("parent already known to be stored; qed");
let b = bc.block(&hash).expect("parent already known to be stored; qed");
excluded.extend(b.uncle_hashes());
hash = details.parent;
}
@ -195,10 +190,18 @@ fn verify_uncles(block: &PreverifiedBlock, bc: &dyn BlockProvider, engine: &dyn
let depth = if header.number() > uncle.number() { header.number() - uncle.number() } else { 0 };
if depth > MAX_UNCLE_AGE as u64 {
return Err(From::from(BlockError::UncleTooOld(OutOfBounds { min: Some(header.number() - depth), max: Some(header.number() - 1), found: uncle.number() })));
return Err(From::from(BlockError::UncleTooOld(OutOfBounds {
min: Some(header.number() - depth),
max: Some(header.number() - 1),
found: uncle.number()
})));
}
else if depth < 1 {
return Err(From::from(BlockError::UncleIsBrother(OutOfBounds { min: Some(header.number() - depth), max: Some(header.number() - 1), found: uncle.number() })));
return Err(From::from(BlockError::UncleIsBrother(OutOfBounds {
min: Some(header.number() - depth),
max: Some(header.number() - 1),
found: uncle.number()
})));
}
// cB
@ -211,7 +214,8 @@ fn verify_uncles(block: &PreverifiedBlock, bc: &dyn BlockProvider, engine: &dyn
// cB.p^7 -------------/
// cB.p^8
let mut expected_uncle_parent = header.parent_hash().clone();
let uncle_parent = bc.block_header_data(&uncle.parent_hash()).ok_or_else(|| Error::from(BlockError::UnknownUncleParent(uncle.parent_hash().clone())))?;
let uncle_parent = bc.block_header_data(&uncle.parent_hash())
.ok_or_else(|| Error::from(BlockError::UnknownUncleParent(*uncle.parent_hash())))?;
for _ in 0..depth {
match bc.block_details(&expected_uncle_parent) {
Some(details) => {
@ -237,22 +241,34 @@ fn verify_uncles(block: &PreverifiedBlock, bc: &dyn BlockProvider, engine: &dyn
/// Phase 4 verification. Check block information against transaction enactment results,
pub fn verify_block_final(expected: &Header, got: &Header) -> Result<(), Error> {
if expected.state_root() != got.state_root() {
return Err(From::from(BlockError::InvalidStateRoot(Mismatch { expected: *expected.state_root(), found: *got.state_root() })))
return Err(From::from(BlockError::InvalidStateRoot(Mismatch {
expected: *expected.state_root(),
found: *got.state_root()
})))
}
if expected.gas_used() != got.gas_used() {
return Err(From::from(BlockError::InvalidGasUsed(Mismatch { expected: *expected.gas_used(), found: *got.gas_used() })))
return Err(From::from(BlockError::InvalidGasUsed(Mismatch {
expected: *expected.gas_used(),
found: *got.gas_used()
})))
}
if expected.log_bloom() != got.log_bloom() {
return Err(From::from(BlockError::InvalidLogBloom(Box::new(Mismatch { expected: *expected.log_bloom(), found: *got.log_bloom() }))))
return Err(From::from(BlockError::InvalidLogBloom(Box::new(Mismatch {
expected: *expected.log_bloom(),
found: *got.log_bloom()
}))))
}
if expected.receipts_root() != got.receipts_root() {
return Err(From::from(BlockError::InvalidReceiptsRoot(Mismatch { expected: *expected.receipts_root(), found: *got.receipts_root() })))
return Err(From::from(BlockError::InvalidReceiptsRoot(Mismatch {
expected: *expected.receipts_root(),
found: *got.receipts_root()
})))
}
Ok(())
}
/// Check basic header parameters.
pub(crate) fn verify_header_params(header: &Header, engine: &dyn Engine, is_full: bool, check_seal: bool) -> Result<(), Error> {
pub(crate) fn verify_header_params(header: &Header, engine: &dyn Engine, check_seal: bool) -> Result<(), Error> {
if check_seal {
let expected_seal_fields = engine.seal_fields(header);
if header.seal().len() != expected_seal_fields {
@ -263,48 +279,83 @@ pub(crate) fn verify_header_params(header: &Header, engine: &dyn Engine, is_full
}
if header.number() >= From::from(BlockNumber::max_value()) {
return Err(From::from(BlockError::RidiculousNumber(OutOfBounds { max: Some(From::from(BlockNumber::max_value())), min: None, found: header.number() })))
return Err(From::from(BlockError::RidiculousNumber(OutOfBounds {
max: Some(From::from(BlockNumber::max_value())),
min: None,
found: header.number()
})))
}
if header.gas_used() > header.gas_limit() {
return Err(From::from(BlockError::TooMuchGasUsed(OutOfBounds { max: Some(*header.gas_limit()), min: None, found: *header.gas_used() })));
return Err(From::from(BlockError::TooMuchGasUsed(OutOfBounds {
max: Some(*header.gas_limit()),
min: None,
found: *header.gas_used()
})));
}
let min_gas_limit = engine.params().min_gas_limit;
if header.gas_limit() < &min_gas_limit {
return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: Some(min_gas_limit), max: None, found: *header.gas_limit() })));
return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds {
min: Some(min_gas_limit),
max: None,
found: *header.gas_limit()
})));
}
if let Some(limit) = engine.maximum_gas_limit() {
if header.gas_limit() > &limit {
return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: None, max: Some(limit), found: *header.gas_limit() })));
return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds {
min: None,
max: Some(limit),
found: *header.gas_limit()
})));
}
}
let maximum_extra_data_size = engine.maximum_extra_data_size();
if header.number() != 0 && header.extra_data().len() > maximum_extra_data_size {
return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds { min: None, max: Some(maximum_extra_data_size), found: header.extra_data().len() })));
return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds {
min: None,
max: Some(maximum_extra_data_size),
found: header.extra_data().len()
})));
}
if let Some(ref ext) = engine.machine().ethash_extensions() {
if header.number() >= ext.dao_hardfork_transition &&
header.number() <= ext.dao_hardfork_transition + 9 &&
header.extra_data()[..] != b"dao-hard-fork"[..] {
return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds { min: None, max: None, found: 0 })));
return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds {
min: None,
max: None,
found: 0
})));
}
}
if is_full {
const ACCEPTABLE_DRIFT: Duration = Duration::from_secs(15);
// this will resist overflow until `year 2037`
let max_time = SystemTime::now() + ACCEPTABLE_DRIFT;
let invalid_threshold = max_time + ACCEPTABLE_DRIFT * 9;
let timestamp = CheckedSystemTime::checked_add(UNIX_EPOCH, Duration::from_secs(header.timestamp()))
.ok_or(BlockError::TimestampOverflow)?;
Ok(())
}
if timestamp > invalid_threshold {
return Err(From::from(BlockError::InvalidTimestamp(OutOfBounds { max: Some(max_time), min: None, found: timestamp }.into())))
}
/// A header verification step that should be done for new block headers, but not for uncles.
pub(crate) fn verify_header_time(header: &Header) -> Result<(), Error> {
const ACCEPTABLE_DRIFT: Duration = Duration::from_secs(15);
// this will resist overflow until `year 2037`
let max_time = SystemTime::now() + ACCEPTABLE_DRIFT;
let invalid_threshold = max_time + ACCEPTABLE_DRIFT * 9;
let timestamp = CheckedSystemTime::checked_add(UNIX_EPOCH, Duration::from_secs(header.timestamp()))
.ok_or(BlockError::TimestampOverflow)?;
if timestamp > max_time {
return Err(From::from(BlockError::TemporarilyInvalid(OutOfBounds { max: Some(max_time), min: None, found: timestamp }.into())))
}
if timestamp > invalid_threshold {
return Err(From::from(BlockError::InvalidTimestamp(OutOfBounds {
max: Some(max_time),
min: None,
found: timestamp
}.into())))
}
if timestamp > max_time {
return Err(From::from(BlockError::TemporarilyInvalid(OutOfBounds {
max: Some(max_time),
min: None,
found: timestamp
}.into())))
}
Ok(())
@ -326,18 +377,29 @@ fn verify_parent(header: &Header, parent: &Header, engine: &dyn Engine) -> Resul
return Err(From::from(BlockError::InvalidTimestamp(OutOfBounds { max: None, min: Some(min), found }.into())))
}
if header.number() != parent.number() + 1 {
return Err(From::from(BlockError::InvalidNumber(Mismatch { expected: parent.number() + 1, found: header.number() })));
return Err(From::from(BlockError::InvalidNumber(Mismatch {
expected: parent.number() + 1,
found: header.number()
})));
}
if header.number() == 0 {
return Err(BlockError::RidiculousNumber(OutOfBounds { min: Some(1), max: None, found: header.number() }).into());
return Err(BlockError::RidiculousNumber(OutOfBounds {
min: Some(1),
max: None,
found: header.number()
}).into());
}
let parent_gas_limit = *parent.gas_limit();
let min_gas = parent_gas_limit - parent_gas_limit / gas_limit_divisor;
let max_gas = parent_gas_limit + parent_gas_limit / gas_limit_divisor;
if header.gas_limit() <= &min_gas || header.gas_limit() >= &max_gas {
return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: Some(min_gas), max: Some(max_gas), found: *header.gas_limit() })));
return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds {
min: Some(min_gas),
max: Some(max_gas),
found: *header.gas_limit()
})));
}
Ok(())
@ -448,7 +510,7 @@ mod tests {
block_provider: bc as &dyn BlockProvider,
client: &client,
};
verify_block_family(&block.header, &parent, engine, Some(full_params))
verify_block_family(&block.header, &parent, engine, full_params)
}
fn unordered_test(bytes: &[u8], engine: &dyn Engine) -> Result<(), Error> {

46
ethcore/verification/src/verifier.rs
View File

@ -1,46 +0,0 @@
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity Ethereum.
// Parity Ethereum 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 Ethereum 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 Ethereum. If not, see <http://www.gnu.org/licenses/>.
//! A generic verifier trait.
use call_contract::CallContract;
use client_traits::BlockInfo;
use common_types::{
header::Header,
errors::EthcoreError as Error,
};
use engine::Engine;
use super::verification;
/// Should be used to verify blocks.
pub trait Verifier<C>: Send + Sync
where C: BlockInfo + CallContract
{
/// Verify a block relative to its parent and uncles.
fn verify_block_family(
&self,
header: &Header,
parent: &Header,
engine: &dyn Engine,
do_full: Option<verification::FullFamilyParams<C>>
) -> Result<(), Error>;
/// Do a final verification check for an enacted header vs its expected counterpart.
fn verify_block_final(&self, expected: &Header, got: &Header) -> Result<(), Error>;
/// Verify a block, inspecting external state.
fn verify_block_external(&self, header: &Header, engine: &dyn Engine) -> Result<(), Error>;
}