Crate densol 

On-chain LZ4 compression for Solana programs.

densol provides a Compressor trait and a ready-to-use Lz4 implementation that fits within the SBF VM’s 32 KB heap constraint. Pair it with densol-derive to add transparent compression to any Anchor account field with a single attribute.

Quick start

Add to Cargo.toml:

densol = "0.1"

use densol::Lz4 as Strategy;
use densol::Compress;

#[account]
#[derive(Compress)]
pub struct MyAccount {
    #[compress]
    pub data: Vec<u8>,
}

// generated:
// my_account.set_data(&raw_bytes)?;  // compress + store
// let raw = my_account.get_data()?;  // load + decompress

Features

Feature	Default	Description
lz4	yes	Enables the Lz4 strategy via lz4_flex
discriminant	yes	Prepends a 1-byte algorithm tag to compressed output
derive	yes	Re-exports the #[derive(Compress)] macro
std	no	Implements std::error::Error for CompressionError

Structs

Lz4

LZ4 compression strategy.

Enums

CompressionError

Traits

Compressor

Stateless compression strategy.

Derive Macros

Compress

Derive set_<field> / get_<field> helpers for fields marked #[compress].