135 lines
3.9 KiB
Rust
135 lines
3.9 KiB
Rust
use util::*;
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use account::*;
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#[derive(Debug,Clone,PartialEq,Eq)]
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/// An account, expressed as Plain-Old-Data (hence the name).
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/// Does not have a DB overlay cache, code hash or anything like that.
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pub struct PodAccount {
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/// The balance of the account.
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pub balance: U256,
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/// The nonce of the account.
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pub nonce: U256,
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/// The code of the account.
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pub code: Bytes,
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/// The storage of the account.
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pub storage: BTreeMap<H256, H256>,
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}
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impl PodAccount {
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/// Construct new object.
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#[cfg(test)]
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pub fn new(balance: U256, nonce: U256, code: Bytes, storage: BTreeMap<H256, H256>) -> PodAccount {
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PodAccount { balance: balance, nonce: nonce, code: code, storage: storage }
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}
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/// Convert Account to a PodAccount.
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/// NOTE: This will silently fail unless the account is fully cached.
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pub fn from_account(acc: &Account) -> PodAccount {
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PodAccount {
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balance: acc.balance().clone(),
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nonce: acc.nonce().clone(),
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storage: acc.storage_overlay().iter().fold(BTreeMap::new(), |mut m, (k, &(_, ref v))| {m.insert(k.clone(), v.clone()); m}),
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code: acc.code().unwrap().to_vec(),
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}
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}
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/// Returns the RLP for this account.
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pub fn rlp(&self) -> Bytes {
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let mut stream = RlpStream::new_list(4);
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stream.append(&self.nonce);
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stream.append(&self.balance);
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stream.append(&sec_trie_root(self.storage.iter().map(|(k, v)| (k.to_vec(), encode(&U256::from(v.as_slice())).to_vec())).collect()));
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stream.append(&self.code.sha3());
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stream.out()
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}
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/// Place additional data into given hash DB.
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pub fn insert_additional(&self, db: &mut HashDB) {
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if !self.code.is_empty() {
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db.insert(&self.code);
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}
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let mut r = H256::new();
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let mut t = SecTrieDBMut::new(db, &mut r);
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for (k, v) in &self.storage {
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t.insert(k, &encode(&U256::from(v.as_slice())));
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}
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}
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}
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impl fmt::Display for PodAccount {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "(bal={}; nonce={}; code={} bytes, #{}; storage={} items)", self.balance, self.nonce, self.code.len(), self.code.sha3(), self.storage.len())
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}
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}
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#[cfg(test)]
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mod test {
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use common::*;
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use account_diff::*;
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use super::*;
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#[test]
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fn existence() {
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let a = PodAccount{balance: x!(69), nonce: x!(0), code: vec![], storage: map![]};
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assert_eq!(AccountDiff::diff_pod(Some(&a), Some(&a)), None);
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assert_eq!(AccountDiff::diff_pod(None, Some(&a)), Some(AccountDiff{
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balance: Diff::Born(x!(69)),
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nonce: Diff::Born(x!(0)),
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code: Diff::Born(vec![]),
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storage: map![],
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}));
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}
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#[test]
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fn basic() {
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let a = PodAccount{balance: x!(69), nonce: x!(0), code: vec![], storage: map![]};
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let b = PodAccount{balance: x!(42), nonce: x!(1), code: vec![], storage: map![]};
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assert_eq!(AccountDiff::diff_pod(Some(&a), Some(&b)), Some(AccountDiff {
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balance: Diff::Changed(x!(69), x!(42)),
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nonce: Diff::Changed(x!(0), x!(1)),
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code: Diff::Same,
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storage: map![],
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}));
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}
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#[test]
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fn code() {
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let a = PodAccount{balance: x!(0), nonce: x!(0), code: vec![], storage: map![]};
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let b = PodAccount{balance: x!(0), nonce: x!(1), code: vec![0], storage: map![]};
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assert_eq!(AccountDiff::diff_pod(Some(&a), Some(&b)), Some(AccountDiff {
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balance: Diff::Same,
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nonce: Diff::Changed(x!(0), x!(1)),
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code: Diff::Changed(vec![], vec![0]),
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storage: map![],
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}));
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}
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#[test]
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fn storage() {
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let a = PodAccount {
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balance: x!(0),
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nonce: x!(0),
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code: vec![],
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storage: mapx![1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 0, 6 => 0, 7 => 0]
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};
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let b = PodAccount {
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balance: x!(0),
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nonce: x!(0),
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code: vec![],
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storage: mapx![1 => 1, 2 => 3, 3 => 0, 5 => 0, 7 => 7, 8 => 0, 9 => 9]
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};
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assert_eq!(AccountDiff::diff_pod(Some(&a), Some(&b)), Some(AccountDiff {
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balance: Diff::Same,
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nonce: Diff::Same,
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code: Diff::Same,
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storage: map![
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x!(2) => Diff::new(x!(2), x!(3)),
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x!(3) => Diff::new(x!(3), x!(0)),
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x!(4) => Diff::new(x!(4), x!(0)),
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x!(7) => Diff::new(x!(0), x!(7)),
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x!(9) => Diff::new(x!(0), x!(9))
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],
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}));
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}
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}
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