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Merge pull request #50 from gavofyork/gav

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Move all chain parameters into `engine_params`
This commit is contained in:
Arkadiy Paronyan 2016-01-05 00:01:45 +01:00
commit d15d803820
3 changed files with 174 additions and 40 deletions
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23
src/engine.rs
View File

@ -1,5 +1,7 @@
use std::collections::hash_map::*;
use util::bytes::*;
use util::uint::*;
use util::rlp::*;
use util::semantic_version::*;
use util::error::*;
use header::Header;
@ -27,25 +29,40 @@ pub trait Engine {
/// Get the general parameters of the chain.
fn spec(&self) -> &Spec;
/// Get the EVM schedule for
/// Get the EVM schedule for the given `env_info`.
fn evm_schedule(&self, env_info: &EnvInfo) -> EvmSchedule;
/// Some intrinsic operation parameters; by default they take their value from the `spec()`'s `engine_params`.
fn maximum_extra_data_size(&self, _env_info: &EnvInfo) -> usize { decode(&self.spec().engine_params.get("maximum_extra_data_size").unwrap()) }
fn account_start_nonce(&self, _env_info: &EnvInfo) -> U256 { decode(&self.spec().engine_params.get("account_start_nonce").unwrap()) }
// TODO: refactor in terms of `on_preseal_block`
fn block_reward(&self, _env_info: &EnvInfo) -> U256 { decode(&self.spec().engine_params.get("block_reward").unwrap()) }
/// Block transformation functions, before and after the transactions.
// fn on_new_block(&self, _env_info: &EnvInfo, _block: &mut Block) -> Result<(), EthcoreError> {}
// fn on_preseal_block(&self, _env_info: &EnvInfo, _block: &mut Block) -> Result<(), EthcoreError> {}
/// Verify that `header` is valid.
/// `parent` (the parent header) and `block` (the header's full block) may be provided for additional
/// checks. Returns either a null `Ok` or a general error detailing the problem with import.
// TODO: consider including State in the params.
fn verify(&self, _header: &Header, _parent: Option<&Header>, _block: Option<&[u8]>) -> Result<(), EthcoreError> { Ok(()) }
/// Additional verification for transactions in blocks.
// TODO: Add flags for which bits of the transaction to check.
// TODO: consider including State in the params.
fn verify_transaction(&self, _t: &Transaction, _header: &Header) -> Result<(), EthcoreError> { Ok(()) }
/// Don't forget to call Super::populateFromParent when subclassing & overriding.
// TODO: consider including State in the params.
fn populate_from_parent(&self, _header: &mut Header, _parent: &Header) -> Result<(), EthcoreError> { Ok(()) }
// TODO: buildin contract routing - this will require removing the built-in configuration reading logic from Spec
// into here and removing the Spec::builtins field. It's a big job.
// TODO: buildin contract routing - to do this properly, it will require removing the built-in configuration-reading logic
// from Spec into here and removing the Spec::builtins field.
/* fn is_builtin(&self, a: Address) -> bool;
fn cost_of_builtin(&self, a: Address, in: &[u8]) -> bignum;
fn execute_builtin(&self, a: Address, in: &[u8], out: &mut [u8]);
*/
// TODO: sealing stuff - though might want to leave this for later.
}

24
src/genesis.rs
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@ -34,7 +34,7 @@ impl Genesis {
pub fn new_frontier() -> Genesis {
let root = H256::from_str("d7f8974fb5ac78d9ac099b9ad5018bedc2ce0a72dad1827a1709da30580f0544").unwrap();
let json = base_to_json(include_bytes!("../res/genesis_frontier"));
let (header, state) = Self::load_genesis_json(&json, &root);
let (header, state) = Self::load_genesis_json(json, root);
Self::new_from_header_and_state(header, state)
}
@ -53,7 +53,7 @@ impl Genesis {
}
/// Loads genesis block from json file
fn load_genesis_json(json: &Json, state_root: &H256) -> (Header, HashMap<Address, Account>) {
fn load_genesis_json(json: Json, state_root: H256) -> (Header, HashMap<Address, Account>) {
// once we commit ourselves to some json parsing library (serde?)
// move it to proper data structure
@ -62,11 +62,20 @@ impl Genesis {
let empty_data = encode(&"");
let empty_data_sha3 = empty_data.sha3();
let mut state = HashMap::new();
let accounts = json["alloc"].as_object().expect("Missing genesis state");
for (address, acc) in accounts.iter() {
let addr = Address::from_str(address).unwrap();
let o = acc.as_object().unwrap();
let balance = U256::from_dec_str(o["balance"].as_string().unwrap()).unwrap();
state.insert(addr, Account::new_basic(balance, U256::from(0)));
}
let header = Header {
parent_hash: H256::from_str(&json["parentHash"].as_string().unwrap()[2..]).unwrap(),
uncles_hash: empty_list_sha3.clone(),
author: Address::from_str(&json["coinbase"].as_string().unwrap()[2..]).unwrap(),
state_root: state_root.clone(),
state_root: state_root,
transactions_root: empty_data_sha3.clone(),
receipts_root: empty_data_sha3.clone(),
log_bloom: H2048::new(),
@ -84,15 +93,6 @@ impl Genesis {
}
};
let mut state = HashMap::new();
let accounts = json["alloc"].as_object().expect("Missing genesis state");
for (address, acc) in accounts.iter() {
let addr = Address::from_str(address).unwrap();
let o = acc.as_object().unwrap();
let balance = U256::from_dec_str(o["balance"].as_string().unwrap()).unwrap();
state.insert(addr, Account::new_basic(balance, U256::from(0)));
}
(header, state)
}

167
src/spec.rs
View File

@ -1,17 +1,60 @@
use std::collections::hash_map::*;
use std::io::Read;
use std::collections::HashMap;
use std::cell::*;
use std::str::FromStr;
use rustc_serialize::base64::FromBase64;
use rustc_serialize::json::Json;
use rustc_serialize::hex::FromHex;
use flate2::read::GzDecoder;
use util::uint::*;
use util::hash::*;
use util::bytes::*;
use util::triehash::*;
use util::error::*;
use util::rlp::*;
use account::Account;
use util::sha3::*;
use account::*;
use engine::Engine;
use builtin::Builtin;
use null_engine::NullEngine;
use denominations::*;
use header::*;
/// Converts file from base64 gzipped bytes to json
pub fn base_to_json(source: &[u8]) -> Json {
// there is probably no need to store genesis in based64 gzip,
// but that's what go does, and it was easy to load it this way
let data = source.from_base64().expect("Genesis block is malformed!");
let data_ref: &[u8] = &data;
let mut decoder = GzDecoder::new(data_ref).expect("Gzip is invalid");
let mut s: String = "".to_string();
decoder.read_to_string(&mut s).expect("Gzip is invalid");
Json::from_str(&s).expect("Json is invalid")
}
/// Convert JSON value to equivlaent RLP representation.
// TODO: handle container types.
pub fn json_to_rlp(json: &Json) -> Bytes {
match json {
&Json::I64(o) => encode(&(o as u64)),
&Json::U64(o) => encode(&o),
&Json::String(ref s) if &s[0..2] == "0x" && U256::from_str(&s[2..]).is_ok() => {
encode(&U256::from_str(&s[2..]).unwrap())
},
&Json::String(ref s) => {
encode(s)
},
_ => panic!()
}
}
/// Convert JSON to a string->RLP map.
pub fn json_to_rlp_map(json: &Json) -> HashMap<String, Bytes> {
json.as_object().unwrap().iter().map(|(k, v)| (k, json_to_rlp(v))).fold(HashMap::new(), |mut acc, kv| {
acc.insert(kv.0.clone(), kv.1);
acc
})
}
/// Parameters for a block chain; includes both those intrinsic to the design of the
/// chain and those to be interpreted by the active chain engine.
@ -19,11 +62,9 @@ pub struct Spec {
// What engine are we using for this?
pub engine_name: String,
// Various parameters for the chain operation.
pub block_reward: U256,
pub maximum_extra_data_size: U256,
pub account_start_nonce: U256,
pub misc: HashMap<String, Bytes>,
// Parameters concerning operation of the specific engine we're using.
// Name -> RLP-encoded value
pub engine_params: HashMap<String, Bytes>,
// Builtin-contracts are here for now but would like to abstract into Engine API eventually.
pub builtins: HashMap<Address, Builtin>,
@ -62,26 +103,100 @@ impl Spec {
Ref::map(self.state_root_memo.borrow(), |x|x.as_ref().unwrap())
}
pub fn block_reward(&self) -> U256 { self.block_reward }
pub fn maximum_extra_data_size(&self) -> U256 { self.maximum_extra_data_size }
pub fn account_start_nonce(&self) -> U256 { self.account_start_nonce }
/// Compose the genesis block for this chain.
pub fn genesis_block(&self) -> Bytes {
// TODO
unimplemented!();
let empty_list = RlpStream::new_list(0).out();
let empty_list_sha3 = empty_list.sha3();
let header = Header {
parent_hash: self.parent_hash.clone(),
timestamp: self.timestamp.clone(),
number: U256::from(0u8),
author: self.author.clone(),
transactions_root: SHA3_EMPTY.clone(),
uncles_hash: empty_list_sha3.clone(),
extra_data: self.extra_data.clone(),
state_root: self.state_root().clone(),
receipts_root: SHA3_EMPTY.clone(),
log_bloom: H2048::new().clone(),
gas_used: self.gas_used.clone(),
gas_limit: self.gas_limit.clone(),
difficulty: self.difficulty.clone(),
seal: {
let seal = {
let mut s = RlpStream::new_list(self.seal_fields);
s.append_raw(&self.seal_rlp, self.seal_fields);
s.out()
};
let r = Rlp::new(&seal);
(0..self.seal_fields).map(|i| r.at(i).raw().to_vec()).collect()
},
};
let mut ret = RlpStream::new_list(3);
ret.append(&header);
ret.append_raw(&empty_list, 1);
ret.append_raw(&empty_list, 1);
ret.out()
}
}
impl Spec {
/// Loads a chain-specification from a json data structure
pub fn from_json(json: Json) -> Spec {
// once we commit ourselves to some json parsing library (serde?)
// move it to proper data structure
let mut state = HashMap::new();
let accounts = json["alloc"].as_object().expect("Missing genesis state");
for (address, acc) in accounts.iter() {
let addr = Address::from_str(address).unwrap();
let o = acc.as_object().unwrap();
let balance = U256::from_dec_str(o["balance"].as_string().unwrap()).unwrap();
state.insert(addr, Account::new_basic(balance, U256::from(0)));
}
let builtins = {
// TODO: populate from json.
HashMap::new()
};
let (seal_fields, seal_rlp) = {
if json.find("mixhash").is_some() && json.find("nonce").is_some() {
let mut s = RlpStream::new();
s.append(&H256::from_str(&json["mixhash"].as_string().unwrap()[2..]).unwrap());
s.append(&H64::from_str(&json["nonce"].as_string().unwrap()[2..]).unwrap());
(2, s.out())
} else {
// backup algo that will work with sealFields/sealRlp (and without).
(usize::from_str(&json["sealFields"].as_string().unwrap_or("0x")[2..]).unwrap(), json["sealRlp"].as_string().unwrap_or("0x")[2..].from_hex().unwrap())
}
};
Spec {
engine_name: json["engineName"].as_string().unwrap().to_string(),
engine_params: json_to_rlp_map(&json["params"]),
builtins: builtins,
parent_hash: H256::from_str(&json["parentHash"].as_string().unwrap()[2..]).unwrap(),
author: Address::from_str(&json["coinbase"].as_string().unwrap()[2..]).unwrap(),
difficulty: U256::from_str(&json["difficulty"].as_string().unwrap()[2..]).unwrap(),
gas_limit: U256::from_str(&json["gasLimit"].as_string().unwrap()[2..]).unwrap(),
gas_used: U256::from(0u8),
timestamp: U256::from_str(&json["timestamp"].as_string().unwrap()[2..]).unwrap(),
extra_data: json["extraData"].as_string().unwrap()[2..].from_hex().unwrap(),
genesis_state: state,
seal_fields: seal_fields,
seal_rlp: seal_rlp,
state_root_memo: RefCell::new(json["stateRoot"].as_string().map(|s| H256::from_str(&s[2..]).unwrap())),
}
}
/// Creates the Olympic network chain spec.
pub fn olympic() -> Spec {
Spec {
engine_name: "Ethash".to_string(),
block_reward: finney() * U256::from(1500u64),
maximum_extra_data_size: U256::from(1024u64),
account_start_nonce: U256::from(0u64),
misc: vec![
engine_params: vec![
("block_reward", encode(&(finney() * U256::from(1500u64)))),
("maximum_extra_data_size", encode(&U256::from(1024u64))),
("account_start_nonce", encode(&U256::from(0u64))),
("gas_limit_bounds_divisor", encode(&1024u64)),
("minimum_difficulty", encode(&131_072u64)),
("difficulty_bound_divisor", encode(&2048u64)),
@ -112,13 +227,14 @@ impl Spec {
}
}
/// Creates the Frontier network chain spec.
pub fn frontier() -> Spec {
Spec {
engine_name: "Ethash".to_string(),
block_reward: ether() * U256::from(5u64),
maximum_extra_data_size: U256::from(32u64),
account_start_nonce: U256::from(0u64),
misc: vec![
engine_params: vec![
("block_reward", encode(&(ether() * U256::from(5u64)))),
("maximum_extra_data_size", encode(&U256::from(32u64))),
("account_start_nonce", encode(&U256::from(0u64))),
("gas_limit_bounds_divisor", encode(&1024u64)),
("minimum_difficulty", encode(&131_072u64)),
("difficulty_bound_divisor", encode(&2048u64)),
@ -149,13 +265,14 @@ impl Spec {
}
}
/// Creates the Morden network chain spec.
pub fn morden() -> Spec {
Spec {
engine_name: "Ethash".to_string(),
block_reward: ether() * U256::from(5u64),
maximum_extra_data_size: U256::from(32u64),
account_start_nonce: U256::from(1u64) << 20,
misc: vec![
engine_params: vec![
("block_reward", encode(&(ether() * U256::from(5u64)))),
("maximum_extra_data_size", encode(&U256::from(32u64))),
("account_start_nonce", encode(&(U256::from(1u64) << 20))),
("gas_limit_bounds_divisor", encode(&1024u64)),
("minimum_difficulty", encode(&131_072u64)),
("difficulty_bound_divisor", encode(&2048u64)),