Trait Codec32 

pub trait Codec32: Sized {
    // Required methods
    fn encode_32(&self) -> [u8; 32];
    fn decode_32(bytes: &[u8; 32]) -> Result<Self>;
}

Trait for types that can be encoded/decoded to/from 32-byte slots.

This trait is used for storage operations where all values must fit in fixed 32-byte slots. Primitive integers are stored in little-endian format with zero-padding.

Derivable

Use #[derive(Codec32)] for custom types (requires BytesCodec):

#[derive(BytesCodec, Codec32)]
struct Balance {
    amount: u64,
    locked: u64,
}

Example

let value = 1000u64;
let slot = value.encode_32();
let decoded = u64::decode_32(&slot)?;
assert_eq!(decoded, 1000);

Required Methods

fn encode_32(&self) -> [u8; 32]

Encodes the value into a 32-byte array.

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

Decodes a value from a 32-byte array.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Codec32 for bool

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for i8

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for i16

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for i32

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for i64

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for i128

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for u8

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for u16

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for u32

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for u64

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for u128

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

impl Codec32 for [u8; 32]

fn encode_32(&self) -> [u8; 32]

fn decode_32(bytes: &[u8; 32]) -> Result<Self>

Implementors