Struct LayoutInfo 

pub struct LayoutInfo {
    pub disc: u8,
    pub version: u8,
    pub flags: u16,
    pub layout_id: [u8; 8],
    pub schema_epoch: u32,
    pub data_len: usize,
}

Runtime metadata snapshot of an account’s layout identity.

Returned by AccountView::layout_info(). Enables manager inspection, schema comparison, and version-aware loading without knowing the concrete layout type at compile time.

Fields

disc: u8

version: u8

flags: u16

layout_id: [u8; 8]

schema_epoch: u32

Schema-evolution epoch read from the header’s bytes 12..16. A value of 0 means “legacy” (pre-audit accounts) and is treated as equivalent to DEFAULT_SCHEMA_EPOCH when comparing against AccountLayout::SCHEMA_EPOCH.

data_len: usize

Implementations

impl LayoutInfo

pub fn from_data(data: &[u8]) -> Option<Self>

Read layout info from an account’s raw data.

pub fn matches<T: LayoutContract>(&self) -> bool

Whether this account matches the given layout contract.

pub const fn body_len(&self) -> usize

Length of the account body after the Hopper header.

pub const fn has_bytes_after(&self, offset: usize) -> bool

Whether the account contains bytes beyond a given absolute offset.

Trait Implementations

impl Clone for LayoutInfo

fn clone(&self) -> LayoutInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LayoutInfo

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

Formats the value using the given formatter.

impl PartialEq for LayoutInfo

fn eq(&self, other: &LayoutInfo) -> 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 Copy for LayoutInfo

impl Eq for LayoutInfo

impl StructuralPartialEq for LayoutInfo