318 lines
10 KiB
Rust
318 lines
10 KiB
Rust
// 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/>.
|
|
|
|
//! Account system expressed in Plain Old Data.
|
|
|
|
use bytes::Bytes;
|
|
use ethereum_types::{H256, U256};
|
|
use ethjson;
|
|
use ethtrie::RlpCodec;
|
|
use hash::keccak;
|
|
use hash_db::HashDB;
|
|
use itertools::Itertools;
|
|
use keccak_hasher::KeccakHasher;
|
|
use kvdb::DBValue;
|
|
use rlp::{self, RlpStream};
|
|
use rustc_hex::ToHex;
|
|
use serde::Serializer;
|
|
use state::Account;
|
|
use std::{collections::BTreeMap, fmt};
|
|
use trie::TrieFactory;
|
|
use triehash::sec_trie_root;
|
|
use types::account_diff::*;
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
|
|
/// An account, expressed as Plain-Old-Data (hence the name).
|
|
/// Does not have a DB overlay cache, code hash or anything like that.
|
|
pub struct PodAccount {
|
|
/// The balance of the account.
|
|
pub balance: U256,
|
|
/// The nonce of the account.
|
|
pub nonce: U256,
|
|
#[serde(serialize_with = "opt_bytes_to_hex")]
|
|
/// The code of the account or `None` in the special case that it is unknown.
|
|
pub code: Option<Bytes>,
|
|
/// The storage of the account.
|
|
pub storage: BTreeMap<H256, H256>,
|
|
}
|
|
|
|
fn opt_bytes_to_hex<S>(opt_bytes: &Option<Bytes>, serializer: S) -> Result<S::Ok, S::Error>
|
|
where
|
|
S: Serializer,
|
|
{
|
|
serializer.collect_str(&format_args!(
|
|
"0x{}",
|
|
opt_bytes.as_ref().map_or("".to_string(), |b| b.to_hex())
|
|
))
|
|
}
|
|
|
|
impl PodAccount {
|
|
/// Convert Account to a PodAccount.
|
|
/// NOTE: This will silently fail unless the account is fully cached.
|
|
pub fn from_account(acc: &Account) -> PodAccount {
|
|
PodAccount {
|
|
balance: *acc.balance(),
|
|
nonce: *acc.nonce(),
|
|
storage: acc
|
|
.storage_changes()
|
|
.iter()
|
|
.fold(BTreeMap::new(), |mut m, (k, v)| {
|
|
m.insert(k.clone(), v.clone());
|
|
m
|
|
}),
|
|
code: acc.code().map(|x| x.to_vec()),
|
|
}
|
|
}
|
|
|
|
/// Returns the RLP for this account.
|
|
pub fn rlp(&self) -> Bytes {
|
|
let mut stream = RlpStream::new_list(4);
|
|
stream.append(&self.nonce);
|
|
stream.append(&self.balance);
|
|
stream.append(&sec_trie_root(
|
|
self.storage
|
|
.iter()
|
|
.map(|(k, v)| (k, rlp::encode(&U256::from(&**v)))),
|
|
));
|
|
stream.append(&keccak(&self.code.as_ref().unwrap_or(&vec![])));
|
|
stream.out()
|
|
}
|
|
|
|
/// Place additional data into given hash DB.
|
|
pub fn insert_additional(
|
|
&self,
|
|
db: &mut dyn HashDB<KeccakHasher, DBValue>,
|
|
factory: &TrieFactory<KeccakHasher, RlpCodec>,
|
|
) {
|
|
match self.code {
|
|
Some(ref c) if !c.is_empty() => {
|
|
db.insert(c);
|
|
}
|
|
_ => {}
|
|
}
|
|
let mut r = H256::new();
|
|
let mut t = factory.create(db, &mut r);
|
|
for (k, v) in &self.storage {
|
|
if let Err(e) = t.insert(k, &rlp::encode(&U256::from(&**v))) {
|
|
warn!("Encountered potential DB corruption: {}", e);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<ethjson::blockchain::Account> for PodAccount {
|
|
fn from(a: ethjson::blockchain::Account) -> Self {
|
|
PodAccount {
|
|
balance: a.balance.into(),
|
|
nonce: a.nonce.into(),
|
|
code: Some(a.code.into()),
|
|
storage: a
|
|
.storage
|
|
.into_iter()
|
|
.map(|(key, value)| {
|
|
let key: U256 = key.into();
|
|
let value: U256 = value.into();
|
|
(H256::from(key), H256::from(value))
|
|
})
|
|
.collect(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<ethjson::spec::Account> for PodAccount {
|
|
fn from(a: ethjson::spec::Account) -> Self {
|
|
PodAccount {
|
|
balance: a.balance.map_or_else(U256::zero, Into::into),
|
|
nonce: a.nonce.map_or_else(U256::zero, Into::into),
|
|
code: Some(a.code.map_or_else(Vec::new, Into::into)),
|
|
storage: a.storage.map_or_else(BTreeMap::new, |s| {
|
|
s.into_iter()
|
|
.map(|(key, value)| {
|
|
let key: U256 = key.into();
|
|
let value: U256 = value.into();
|
|
(H256::from(key), H256::from(value))
|
|
})
|
|
.collect()
|
|
}),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for PodAccount {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
write!(
|
|
f,
|
|
"(bal={}; nonce={}; code={} bytes, #{}; storage={} items)",
|
|
self.balance,
|
|
self.nonce,
|
|
self.code.as_ref().map_or(0, |c| c.len()),
|
|
self.code.as_ref().map_or_else(H256::new, |c| keccak(c)),
|
|
self.storage.len(),
|
|
)
|
|
}
|
|
}
|
|
|
|
/// Determine difference between two optionally existant `Account`s. Returns None
|
|
/// if they are the same.
|
|
pub fn diff_pod(pre: Option<&PodAccount>, post: Option<&PodAccount>) -> Option<AccountDiff> {
|
|
match (pre, post) {
|
|
(None, Some(x)) => Some(AccountDiff {
|
|
balance: Diff::Born(x.balance),
|
|
nonce: Diff::Born(x.nonce),
|
|
code: Diff::Born(x.code.as_ref().expect("account is newly created; newly created accounts must be given code; all caches should remain in place; qed").clone()),
|
|
storage: x.storage.iter().map(|(k, v)| (k.clone(), Diff::Born(v.clone()))).collect(),
|
|
}),
|
|
(Some(x), None) => Some(AccountDiff {
|
|
balance: Diff::Died(x.balance),
|
|
nonce: Diff::Died(x.nonce),
|
|
code: Diff::Died(x.code.as_ref().expect("account is deleted; only way to delete account is running SUICIDE; account must have had own code cached to make operation; all caches should remain in place; qed").clone()),
|
|
storage: x.storage.iter().map(|(k, v)| (k.clone(), Diff::Died(v.clone()))).collect(),
|
|
}),
|
|
(Some(pre), Some(post)) => {
|
|
let storage: Vec<_> = pre.storage.keys().merge(post.storage.keys())
|
|
.filter(|k| pre.storage.get(k).unwrap_or(&H256::new()) != post.storage.get(k).unwrap_or(&H256::new()))
|
|
.collect();
|
|
let r = AccountDiff {
|
|
balance: Diff::new(pre.balance, post.balance),
|
|
nonce: Diff::new(pre.nonce, post.nonce),
|
|
code: match (pre.code.clone(), post.code.clone()) {
|
|
(Some(pre_code), Some(post_code)) => Diff::new(pre_code, post_code),
|
|
_ => Diff::Same,
|
|
},
|
|
storage: storage.into_iter().map(|k|
|
|
(k.clone(), Diff::new(
|
|
pre.storage.get(k).cloned().unwrap_or_else(H256::new),
|
|
post.storage.get(k).cloned().unwrap_or_else(H256::new)
|
|
))).collect(),
|
|
};
|
|
if r.balance.is_same() && r.nonce.is_same() && r.code.is_same() && r.storage.is_empty() {
|
|
None
|
|
} else {
|
|
Some(r)
|
|
}
|
|
},
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use super::{diff_pod, PodAccount};
|
|
use std::collections::BTreeMap;
|
|
use types::account_diff::*;
|
|
|
|
#[test]
|
|
fn existence() {
|
|
let a = PodAccount {
|
|
balance: 69.into(),
|
|
nonce: 0.into(),
|
|
code: Some(vec![]),
|
|
storage: map![],
|
|
};
|
|
assert_eq!(diff_pod(Some(&a), Some(&a)), None);
|
|
assert_eq!(
|
|
diff_pod(None, Some(&a)),
|
|
Some(AccountDiff {
|
|
balance: Diff::Born(69.into()),
|
|
nonce: Diff::Born(0.into()),
|
|
code: Diff::Born(vec![]),
|
|
storage: map![],
|
|
})
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn basic() {
|
|
let a = PodAccount {
|
|
balance: 69.into(),
|
|
nonce: 0.into(),
|
|
code: Some(vec![]),
|
|
storage: map![],
|
|
};
|
|
let b = PodAccount {
|
|
balance: 42.into(),
|
|
nonce: 1.into(),
|
|
code: Some(vec![]),
|
|
storage: map![],
|
|
};
|
|
assert_eq!(
|
|
diff_pod(Some(&a), Some(&b)),
|
|
Some(AccountDiff {
|
|
balance: Diff::Changed(69.into(), 42.into()),
|
|
nonce: Diff::Changed(0.into(), 1.into()),
|
|
code: Diff::Same,
|
|
storage: map![],
|
|
})
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn code() {
|
|
let a = PodAccount {
|
|
balance: 0.into(),
|
|
nonce: 0.into(),
|
|
code: Some(vec![]),
|
|
storage: map![],
|
|
};
|
|
let b = PodAccount {
|
|
balance: 0.into(),
|
|
nonce: 1.into(),
|
|
code: Some(vec![0]),
|
|
storage: map![],
|
|
};
|
|
assert_eq!(
|
|
diff_pod(Some(&a), Some(&b)),
|
|
Some(AccountDiff {
|
|
balance: Diff::Same,
|
|
nonce: Diff::Changed(0.into(), 1.into()),
|
|
code: Diff::Changed(vec![], vec![0]),
|
|
storage: map![],
|
|
})
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn storage() {
|
|
let a = PodAccount {
|
|
balance: 0.into(),
|
|
nonce: 0.into(),
|
|
code: Some(vec![]),
|
|
storage: map_into![1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 0, 6 => 0, 7 => 0],
|
|
};
|
|
let b = PodAccount {
|
|
balance: 0.into(),
|
|
nonce: 0.into(),
|
|
code: Some(vec![]),
|
|
storage: map_into![1 => 1, 2 => 3, 3 => 0, 5 => 0, 7 => 7, 8 => 0, 9 => 9],
|
|
};
|
|
assert_eq!(
|
|
diff_pod(Some(&a), Some(&b)),
|
|
Some(AccountDiff {
|
|
balance: Diff::Same,
|
|
nonce: Diff::Same,
|
|
code: Diff::Same,
|
|
storage: map![
|
|
2.into() => Diff::new(2.into(), 3.into()),
|
|
3.into() => Diff::new(3.into(), 0.into()),
|
|
4.into() => Diff::new(4.into(), 0.into()),
|
|
7.into() => Diff::new(0.into(), 7.into()),
|
|
9.into() => Diff::new(0.into(), 9.into())
|
|
],
|
|
})
|
|
);
|
|
}
|
|
}
|