[](https://github.com/subspace/spartan-codec/actions/workflows/ci.yaml)
[](https://crates.io/crates/spartan-codec)
[](https://docs.rs/spartan-codec)
[](https://github.com/subspace/spartan-codec)
## Overview
**Notes:** The code is un-audited and not production ready, use it at your own risk.
Subspace is a proof-of-storage blockchain that resolves the farmer's dilemma, to learn more read our whitepaper.
This is an adaptation of [SLOTH](https://eprint.iacr.org/2015/366) (slow-timed hash function) into a time-asymmetric permutation using a standard CBC block cipher. This code is largely based on the C implementation used in [PySloth](https://github.com/randomchain/pysloth/blob/master/sloth.c) which is the same as used in the paper.
### Install
This crate requires Rust 1.51 or newer to compile.
If you have not previously installed the `gmp_mpfr_sys` crate, follow these [instructions](https://docs.rs/gmp-mpfr-sys/1.3.0/gmp_mpfr_sys/index.html#building-on-gnulinux).
```
git clone https://github.com/subspace/spartan-codec.git
cd spartan-codec
cargo build
```
### Run Tests
`cargo test`
### Run Benches
TODO
Benches single block encode/decode time and full piece encode/decode time for each prime size.