openethereum/ethcore/src/pod_account.rs

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

318 lines
10 KiB
Rust
Raw Normal View History

2020-09-22 14:53:52 +02:00
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.
2016-02-05 13:40:41 +01:00
2020-09-22 14:53:52 +02:00
// OpenEthereum is free software: you can redistribute it and/or modify
2016-02-05 13:40:41 +01:00
// 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.
2020-09-22 14:53:52 +02:00
// OpenEthereum is distributed in the hope that it will be useful,
2016-02-05 13:40:41 +01:00
// 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
2020-09-22 14:53:52 +02:00
// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
2016-02-05 13:40:41 +01:00
//! Account system expressed in Plain Old Data.
use bytes::Bytes;
use ethereum_types::{H256, U256};
2016-03-17 15:51:40 +01:00
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;
2017-07-29 17:12:07 +02:00
use std::{collections::BTreeMap, fmt};
use trie::TrieFactory;
use triehash::sec_trie_root;
use types::account_diff::*;
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
2016-02-03 13:20:32 +01:00
/// 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 {
2016-02-03 13:20:32 +01:00
/// The balance of the account.
pub balance: U256,
2016-02-03 13:20:32 +01:00
/// 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>,
2016-02-03 13:20:32 +01:00
/// 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 {
2016-02-14 12:54:27 +01:00
balance: *acc.balance(),
nonce: *acc.nonce(),
storage: acc
.storage_changes()
.iter()
.fold(BTreeMap::new(), |mut m, (k, v)| {
m.insert(k.clone(), v.clone());
2020-08-05 06:08:03 +02:00
m
}),
code: acc.code().map(|x| x.to_vec()),
}
2020-08-05 06:08:03 +02:00
}
/// 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);
2018-02-16 20:24:16 +01:00
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,
2020-07-29 10:36:15 +02:00
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();
2016-11-27 11:11:56 +01:00
let mut t = factory.create(db, &mut r);
for (k, v) in &self.storage {
2016-09-01 15:07:06 +02:00
if let Err(e) = t.insert(k, &rlp::encode(&U256::from(&**v))) {
warn!("Encountered potential DB corruption: {}", e);
}
2020-08-05 06:08:03 +02:00
}
}
}
2016-03-17 15:51:40 +01:00
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)| {
2016-03-17 15:51:40 +01:00
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()
}),
2016-03-17 15:51:40 +01:00
}
}
}
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};
2017-07-29 17:12:07 +02:00
use std::collections::BTreeMap;
2016-06-02 12:28:09 +02:00
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 {
2016-05-31 16:59:01 +02:00
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![],
2020-08-05 06:08:03 +02:00
};
assert_eq!(
diff_pod(Some(&a), Some(&b)),
Some(AccountDiff {
balance: Diff::Changed(69.into(), 42.into()),
2016-05-31 16:59:01 +02:00
nonce: Diff::Changed(0.into(), 1.into()),
code: Diff::Same,
storage: map![],
})
);
}
#[test]
fn code() {
let a = PodAccount {
2016-05-31 16:59:01 +02:00
balance: 0.into(),
nonce: 0.into(),
code: Some(vec![]),
storage: map![],
2020-08-05 06:08:03 +02:00
};
let b = PodAccount {
balance: 0.into(),
nonce: 1.into(),
code: Some(vec![0]),
storage: map![],
2020-08-05 06:08:03 +02:00
};
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![],
2020-08-05 06:08:03 +02:00
})
);
}
2016-05-31 17:29:01 +02:00
#[test]
fn storage() {
let a = PodAccount {
balance: 0.into(),
nonce: 0.into(),
code: Some(vec![]),
2016-05-31 17:29:01 +02:00
storage: map_into![1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 0, 6 => 0, 7 => 0],
};
let b = PodAccount {
2016-05-31 16:59:01 +02:00
balance: 0.into(),
nonce: 0.into(),
code: Some(vec![]),
2016-05-31 17:29:01 +02:00
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![
2016-05-31 16:59:01 +02:00
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()),
2016-05-31 21:01:47 +02:00
9.into() => Diff::new(0.into(), 9.into())
],
})
);
}
}