Struct SimpleCoder

#[non_exhaustive]
pub struct SimpleCoder;

Simple coder that only uses the last 31 bytes of each blob. This is the default coder for the SidecarBuilder.

Note

Because this coder sacrifices around 3% of total sidecar space, we do not recommend its use in production. It is provided for convenience and non-prod environments.

Behavior

This coder encodes data as follows:

• The first byte of every 32-byte word is empty.
• Data is pre-pended with a 64-bit big-endian length prefix, which is right padded with zeros to form a complete word.
• The rest of the data is packed into the remaining 31 bytes of each word.
• If the data is not a multiple of 31 bytes, the last word is right-padded with zeros.

This means that the following regions cannot be used to store data, and are considered “wasted”:

• The first byte of every 32-byte word.
• The right padding on the header word containing the data length.
• Any right padding on the last word for each piece of data.

Trait Implementations

impl Clone for SimpleCoder

fn clone(&self) -> SimpleCoder

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SimpleCoder

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

Formats the value using the given formatter.

impl Default for SimpleCoder

fn default() -> SimpleCoder

Returns the “default value” for a type.

impl SidecarCoder for SimpleCoder

fn finish(self, _builder: &mut PartialSidecar)

No-op

fn required_fe(&self, data: &[u8]) -> usize

Calculate the number of field elements required to store the given data.

fn code(&mut self, builder: &mut PartialSidecar, data: &[u8])

Code a slice of data into the builder.

fn decode_all( &mut self, blobs: &[FixedBytes<alloy_eips::::eip4844::Blob::{constant#0}>], ) -> Option<Vec<Vec<u8>>>

Decode all slices of data from the blobs.

impl Copy for SimpleCoder

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 0 bytes