Struct AccountReader 

pub struct AccountReader<'a> { /* private fields */ }

Zero-copy account reader with header awareness.

Constructs from a borrowed &[u8], validates the header, and exposes a cursor over the body for sequential field reads.

Implementations

impl<'a> AccountReader<'a>

pub fn new(data: &'a [u8]) -> Result<Self, ProgramError>

Create a new reader, validating that the data is at least HEADER_LEN bytes.

pub fn new_checked( data: &'a [u8], expected_disc: u8, min_version: u8, layout_id: &[u8; 8], ) -> Result<Self, ProgramError>

Create a reader and validate discriminator + minimum version + layout_id.

pub fn header(&self) -> &AccountHeader

Read the header as a typed reference.

pub fn discriminator(&self) -> u8

Get the discriminator byte.

pub fn version(&self) -> u8

Get the version byte.

pub fn flags(&self) -> u16

Get the flags field.

pub fn layout_id(&self) -> [u8; 8]

Get the layout_id field (bytes 4..12).

pub fn body(&self) -> SliceCursor<'a>

Get a cursor positioned at the start of the body (after the header).

pub fn body_bytes(&self) -> &'a [u8]

Get the raw body bytes.

pub fn raw(&self) -> &'a [u8]

Get the full raw data including header.

pub fn pubkey_at(&self, offset: usize) -> Result<&'a [u8; 32], ProgramError>

Read a pubkey from the body at a given byte offset.

pub fn u64_at(&self, offset: usize) -> Result<u64, ProgramError>

Read a u64 from the body at a given byte offset.

pub fn u32_at(&self, offset: usize) -> Result<u32, ProgramError>

Read a u32 from the body at a given byte offset.

pub fn u16_at(&self, offset: usize) -> Result<u16, ProgramError>

Read a u16 from the body at a given byte offset.

pub fn u8_at(&self, offset: usize) -> Result<u8, ProgramError>

Read a u8 from the body at a given byte offset.

pub fn i64_at(&self, offset: usize) -> Result<i64, ProgramError>

Read an i64 from the body at a given byte offset.

pub fn bool_at(&self, offset: usize) -> Result<bool, ProgramError>

Read a bool from the body at a given byte offset.

pub fn bytes_at<const N: usize>( &self, offset: usize, ) -> Result<[u8; N], ProgramError>

Read a fixed-size byte array from the body at a given byte offset.

pub fn body_len(&self) -> usize

Number of body bytes remaining after the header.