Struct JournalEntry 

pub struct JournalEntry {
    pub block_hash: H256,
    pub parent_state_root: H256,
    pub account_trie_diff: FlatDiff,
    pub storage_trie_diff: FlatDiff,
    pub account_flat_diff: FlatDiff,
    pub storage_flat_diff: FlatDiff,
}

A single reverse-diff entry covering one block’s commit.

All four diff sections are flat lists of (on_disk_key, prev_value) tuples. On rollback, each entry can be applied directly to its column family without further interpretation: Some(prev) becomes a put, None becomes a delete.

Fields

block_hash: H256

Hash of the block whose commit this entry reverses.

parent_state_root: H256

Post-state root of the parent block (the state we’d return to on rollback).

account_trie_diff: FlatDiff

Reverse diff for ACCOUNT_TRIE_NODES.

storage_trie_diff: FlatDiff

Reverse diff for STORAGE_TRIE_NODES. Keys carry the nibble-encoded account-hash prefix as written on disk; no separate grouping is needed.

account_flat_diff: FlatDiff

Reverse diff for ACCOUNT_FLATKEYVALUE.

storage_flat_diff: FlatDiff

Reverse diff for STORAGE_FLATKEYVALUE. Keys carry the nibble-encoded account-hash prefix as written on disk.

Implementations

impl JournalEntry

pub fn encode(&self) -> Vec<u8>

Encode this entry into its on-disk byte representation.

pub fn decode_block_hash(bytes: &[u8]) -> Result<H256, JournalDecodeError>

Read only the block hash of an entry: the version byte followed by the 32-byte hash at offset 1. Skips the reverse diffs, which can run to megabytes for a state-heavy block, and does not depend on their integrity. Rejects a foreign version byte like Self::decode.

pub fn decode(bytes: &[u8]) -> Result<Self, JournalDecodeError>

Decode an entry from its on-disk byte representation.

Returns JournalDecodeError::VersionMismatch if the version byte is not JOURNAL_VERSION. The current binary deliberately refuses to interpret entries written by a future codec version rather than silently producing a malformed reverse-diff.

Trait Implementations

impl Clone for JournalEntry

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for JournalEntry

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for JournalEntry

impl PartialEq for JournalEntry

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for JournalEntry