e53bf9a95e
* removed redundant fmt::Display implementations for Account and State Diff * bring back is_full() method * fix failing test
67 lines
2.0 KiB
Rust
67 lines
2.0 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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//! Diff between two accounts.
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use std::collections::BTreeMap;
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use bytes::Bytes;
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use ethereum_types::{H256, U256};
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#[derive(Debug, PartialEq, Eq, Clone)]
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/// Diff type for specifying a change (or not).
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pub enum Diff<T> {
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/// Both sides are the same.
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Same,
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/// Left (pre, source) side doesn't include value, right side (post, destination) does.
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Born(T),
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/// Both sides include data; it chaged value between them.
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Changed(T, T),
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/// Left (pre, source) side does include value, right side (post, destination) does not.
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Died(T),
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}
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impl<T> Diff<T> {
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/// Construct new object with given `pre` and `post`.
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pub fn new(pre: T, post: T) -> Self where T: Eq {
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if pre == post {
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Diff::Same
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} else {
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Diff::Changed(pre, post)
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}
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}
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/// Determine whether there was a change or not.
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pub fn is_same(&self) -> bool {
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match *self {
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Diff::Same => true,
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_ => false
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}
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}
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}
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#[derive(Debug, PartialEq, Eq, Clone)]
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/// Account diff.
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pub struct AccountDiff {
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/// Change in balance, allowed to be `Diff::Same`.
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pub balance: Diff<U256>,
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/// Change in nonce, allowed to be `Diff::Same`.
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pub nonce: Diff<U256>,
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/// Change in code, allowed to be `Diff::Same`.
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pub code: Diff<Bytes>,
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/// Change in storage, values are not allowed to be `Diff::Same`.
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pub storage: BTreeMap<H256, Diff<H256>>,
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}
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