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delay bomb for Classic (ECIP-1010) (#3179) 

* delay bomb for classic (ECIP-1010)

* formatting fix after core review, rel [e6b5093]
This commit is contained in:
Igor Artamonov 2016-11-05 04:09:23 +06:00 committed by Gav Wood
parent c2e85dc4d5
commit 2a19c33b8d
4 changed files with 177 additions and 7 deletions
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4
ethcore/res/ethereum/classic.json
View File

@ -15,7 +15,9 @@
"eip155Transition": "0x7fffffffffffffff",
"eip160Transition": "0x7fffffffffffffff",
"eip161abcTransition": "0x7fffffffffffffff",
"eip161dTransition": "0x7fffffffffffffff"
"eip161dTransition": "0x7fffffffffffffff",
"ecip1010PauseTransition": "0x2dc6c0",
"ecip1010ContinueTransition": "0x4c4b40"
}
}
},

146
ethcore/src/ethereum/ethash.rs
View File

@ -70,6 +70,10 @@ pub struct EthashParams {
pub eip161abc_transition: u64,
/// Number of first block where EIP-161.d begins.
pub eip161d_transition: u64,
/// Number of first block where ECIP-1010 begins.
pub ecip1010_pause_transition: u64,
/// Number of first block where ECIP-1010 ends.
pub ecip1010_continue_transition: u64
}
impl From<ethjson::spec::EthashParams> for EthashParams {
@ -94,6 +98,8 @@ impl From<ethjson::spec::EthashParams> for EthashParams {
eip160_transition: p.eip160_transition.map_or(0, Into::into),
eip161abc_transition: p.eip161abc_transition.map_or(0, Into::into),
eip161d_transition: p.eip161d_transition.map_or(0x7fffffffffffffff, Into::into),
ecip1010_pause_transition: p.ecip1010_pause_transition.map_or(0x7fffffffffffffff, Into::into),
ecip1010_continue_transition: p.ecip1010_continue_transition.map_or(0x7fffffffffffffff, Into::into),
}
}
}
@ -353,9 +359,20 @@ impl Ethash {
};
target = max(min_difficulty, target);
if header.number() < self.ethash_params.bomb_defuse_transition {
let period = ((parent.number() + 1) / EXP_DIFF_PERIOD) as usize;
if period > 1 {
target = max(min_difficulty, target + (U256::from(1) << (period - 2)));
if header.number() < self.ethash_params.ecip1010_pause_transition {
let period = ((parent.number() + 1) / EXP_DIFF_PERIOD) as usize;
if period > 1 {
target = max(min_difficulty, target + (U256::from(1) << (period - 2)));
}
}
else if header.number() < self.ethash_params.ecip1010_continue_transition {
let fixed_difficulty = ((self.ethash_params.ecip1010_pause_transition / EXP_DIFF_PERIOD) - 2) as usize;
target = max(min_difficulty, target + (U256::from(1) << fixed_difficulty));
}
else {
let period = ((parent.number() + 1) / EXP_DIFF_PERIOD) as usize;
let delay = ((self.ethash_params.ecip1010_continue_transition - self.ethash_params.ecip1010_pause_transition) / EXP_DIFF_PERIOD) as usize;
target = max(min_difficulty, target + (U256::from(1) << (period - delay - 2)));
}
}
target
@ -414,8 +431,8 @@ mod tests {
use env_info::EnvInfo;
use error::{BlockError, Error};
use header::Header;
use super::super::new_morden;
use super::Ethash;
use super::super::{new_morden, new_homestead_test};
use super::{Ethash, EthashParams};
use rlp;
#[test]
@ -637,5 +654,122 @@ mod tests {
assert_eq!(Ethash::difficulty_to_boundary(&U256::from(32)), H256::from_str("0800000000000000000000000000000000000000000000000000000000000000").unwrap());
}
// TODO: difficulty test
#[test]
fn difficulty_frontier() {
let spec = new_homestead_test();
let ethparams = get_default_ethash_params();
let ethash = Ethash::new(spec.params, ethparams, BTreeMap::new());
let mut parent_header = Header::default();
parent_header.set_number(1000000);
parent_header.set_difficulty(U256::from_str("b69de81a22b").unwrap());
parent_header.set_timestamp(1455404053);
let mut header = Header::default();
header.set_number(parent_header.number() + 1);
header.set_timestamp(1455404058);
let difficulty = ethash.calculate_difficulty(&header, &parent_header);
assert_eq!(U256::from_str("b6b4bbd735f").unwrap(), difficulty);
}
#[test]
fn difficulty_homestead() {
let spec = new_homestead_test();
let ethparams = get_default_ethash_params();
let ethash = Ethash::new(spec.params, ethparams, BTreeMap::new());
let mut parent_header = Header::default();
parent_header.set_number(1500000);
parent_header.set_difficulty(U256::from_str("1fd0fd70792b").unwrap());
parent_header.set_timestamp(1463003133);
let mut header = Header::default();
header.set_number(parent_header.number() + 1);
header.set_timestamp(1463003177);
let difficulty = ethash.calculate_difficulty(&header, &parent_header);
assert_eq!(U256::from_str("1fc50f118efe").unwrap(), difficulty);
}
#[test]
fn difficulty_classic_bomb_delay() {
let spec = new_homestead_test();
let ethparams = EthashParams {
ecip1010_pause_transition: 3000000,
..get_default_ethash_params()
};
let ethash = Ethash::new(spec.params, ethparams, BTreeMap::new());
let mut parent_header = Header::default();
parent_header.set_number(3500000);
parent_header.set_difficulty(U256::from_str("6F62EAF8D3C").unwrap());
parent_header.set_timestamp(1452838500);
let mut header = Header::default();
header.set_number(parent_header.number() + 1);
header.set_timestamp(parent_header.timestamp() + 20);
assert_eq!(
U256::from_str("6F55FE9B74B").unwrap(),
ethash.calculate_difficulty(&header, &parent_header)
);
header.set_timestamp(parent_header.timestamp() + 5);
assert_eq!(
U256::from_str("6F71D75632D").unwrap(),
ethash.calculate_difficulty(&header, &parent_header)
);
header.set_timestamp(parent_header.timestamp() + 80);
assert_eq!(
U256::from_str("6F02746B3A5").unwrap(),
ethash.calculate_difficulty(&header, &parent_header)
);
}
#[test]
fn test_difficulty_bomb_continue() {
let spec = new_homestead_test();
let ethparams = EthashParams {
ecip1010_pause_transition: 3000000,
ecip1010_continue_transition: 5000000,
..get_default_ethash_params()
};
let ethash = Ethash::new(spec.params, ethparams, BTreeMap::new());
let mut parent_header = Header::default();
parent_header.set_number(5000102);
parent_header.set_difficulty(U256::from_str("14944397EE8B").unwrap());
parent_header.set_timestamp(1513175023);
let mut header = Header::default();
header.set_number(parent_header.number() + 1);
header.set_timestamp(parent_header.timestamp() + 6);
assert_eq!(
U256::from_str("1496E6206188").unwrap(),
ethash.calculate_difficulty(&header, &parent_header)
);
parent_header.set_number(5100123);
parent_header.set_difficulty(U256::from_str("14D24B39C7CF").unwrap());
parent_header.set_timestamp(1514609324);
header.set_number(parent_header.number() + 1);
header.set_timestamp(parent_header.timestamp() + 41);
assert_eq!(
U256::from_str("14CA9C5D9227").unwrap(),
ethash.calculate_difficulty(&header, &parent_header)
);
parent_header.set_number(6150001);
parent_header.set_difficulty(U256::from_str("305367B57227").unwrap());
parent_header.set_timestamp(1529664575);
header.set_number(parent_header.number() + 1);
header.set_timestamp(parent_header.timestamp() + 105);
assert_eq!(
U256::from_str("309D09E0C609").unwrap(),
ethash.calculate_difficulty(&header, &parent_header)
);
parent_header.set_number(8000000);
parent_header.set_difficulty(U256::from_str("1180B36D4CE5B6A").unwrap());
parent_header.set_timestamp(1535431724);
header.set_number(parent_header.number() + 1);
header.set_timestamp(parent_header.timestamp() + 420);
assert_eq!(
U256::from_str("5126FFD5BCBB9E7").unwrap(),
ethash.calculate_difficulty(&header, &parent_header)
);
}
}

27
ethcore/src/tests/helpers.rs
View File

@ -28,6 +28,7 @@ use evm::Schedule;
use engines::Engine;
use env_info::EnvInfo;
use ethereum;
use ethereum::ethash::EthashParams;
use devtools::*;
use miner::Miner;
use header::Header;
@ -421,3 +422,29 @@ pub fn get_bad_state_dummy_block() -> Bytes {
create_test_block(&block_header)
}
pub fn get_default_ethash_params() -> EthashParams{
EthashParams {
gas_limit_bound_divisor: U256::from(1024),
minimum_difficulty: U256::from(131072),
difficulty_bound_divisor: U256::from(2048),
difficulty_increment_divisor: 10,
duration_limit: 13,
block_reward: U256::from(0),
registrar: "0000000000000000000000000000000000000001".into(),
homestead_transition: 1150000,
dao_hardfork_transition: 0x7fffffffffffffff,
dao_hardfork_beneficiary: "0000000000000000000000000000000000000001".into(),
dao_hardfork_accounts: vec![],
difficulty_hardfork_transition: 0x7fffffffffffffff,
difficulty_hardfork_bound_divisor: U256::from(0),
bomb_defuse_transition: 0x7fffffffffffffff,
eip150_transition: 0x7fffffffffffffff,
eip155_transition: 0x7fffffffffffffff,
eip160_transition: 0x7fffffffffffffff,
eip161abc_transition: 0x7fffffffffffffff,
eip161d_transition: 0x7fffffffffffffff,
ecip1010_pause_transition: 0x7fffffffffffffff,
ecip1010_continue_transition: 0x7fffffffffffffff
}
}

7
json/src/spec/ethash.rs
View File

@ -85,6 +85,13 @@ pub struct EthashParams {
/// See main EthashParams docs.
#[serde(rename="eip161dTransition")]
pub eip161d_transition: Option<Uint>,
/// See main EthashParams docs.
#[serde(rename="ecip1010PauseTransition")]
pub ecip1010_pause_transition: Option<Uint>,
/// See main EthashParams docs.
#[serde(rename="ecip1010ContinueTransition")]
pub ecip1010_continue_transition: Option<Uint>,
}
/// Ethash engine deserialization.