Struct AccountPatch 

#[non_exhaustive]
pub struct AccountPatch {
    pub balance: Option<U256>,
    pub nonce: Option<u64>,
    pub code: Option<Bytes>,
}

A partial account mutation: each Some field overwrites the cached value, each None leaves it unchanged. Setting code recomputes the code hash; Some(empty bytes) clears code to the empty-code hash.

Partial (rather than a full revm AccountInfo) because the Pillar B driver is events, which usually carry one field (a Transfer changes a balance, not nonce/code). This avoids forcing a caller to reconstruct a full AccountInfo and keeps revm’s type out of the public vocabulary.

The struct is #[non_exhaustive]: new fields may be added pre-1.0 without a breaking change. Construct it via AccountPatch::default + the builders (balance / nonce / code), never a struct literal.

Warning

Applying an absolute patch with StateUpdate::Account on an address absent from both cache layers is skipped and surfaced in StateDiff::skipped_accounts. Use StateUpdate::AccountUpsert only when default values for un-patched fields (e.g. nonce 0, empty code) should become authoritative in the backend.

use alloy_primitives::{Bytes, U256};
use evm_fork_cache::AccountPatch;

let patch = AccountPatch::default()
    .balance(U256::from(42))
    .nonce(7)
    .code(Bytes::from_static(&[0x60, 0x00]));
assert_eq!(patch.balance, Some(U256::from(42)));
assert_eq!(patch.nonce, Some(7));
assert_eq!(AccountPatch::default().balance, None);

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

balance: Option<U256>

New balance, if set.

nonce: Option<u64>

New nonce, if set.

code: Option<Bytes>

New runtime code, if set. Setting it recomputes the code hash; empty bytes clear the code to the empty-code hash.

Implementations

impl AccountPatch

pub fn balance(self, balance: U256) -> Self

Set the balance to overwrite (builder style).

pub fn nonce(self, nonce: u64) -> Self

Set the nonce to overwrite (builder style).

pub fn code(self, code: Bytes) -> Self

Set the runtime code to overwrite (builder style). The code hash is recomputed from these bytes when the patch is applied.

Trait Implementations

impl Clone for AccountPatch

fn clone(&self) -> AccountPatch

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AccountPatch

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

Formats the value using the given formatter.

impl Default for AccountPatch

fn default() -> AccountPatch

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for AccountPatch

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for AccountPatch

impl PartialEq for AccountPatch

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for AccountPatch

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AccountPatch