qp-poseidon

A Poseidon hash implementation for the Substrate/Polkadot ecosystem using plonky2 field arithmetic.

Overview

This crate provides a Poseidon hash function implementation that integrates with Substrate's hashing traits and storage systems. It uses Goldilocks field arithmetic from plonky2 for efficient cryptographic operations.

Features

• Substrate Integration: Implements sp_core::Hasher and sp_runtime::traits::Hash traits
• Efficient Field Arithmetic: Uses plonky2's Goldilocks field for optimal performance
• Trie Support: Compatible with Substrate's trie storage systems (V0 and V1 layouts)
• No-std Support: Can be used in no-std environments
• Serde Support: Optional serialization support

Usage

Add this to your Cargo.toml:

[dependencies]
qp-poseidon = "0.0.1"

Basic Hashing

use qp_poseidon::PoseidonHasher;
use sp_core::Hasher;

let data = b"hello world";
let hash = PoseidonHasher::hash(data);
println!("Hash: {:?}", hash);

As Substrate Hash Function

use qp_poseidon::PoseidonHasher;
use sp_runtime::traits::Hash;

let data = b"substrate data";
let hash = PoseidonHasher::hash(data);

Field Element Operations

use qp_poseidon::{injective_bytes_to_felts, PoseidonHasher};

let data = b"some data";
let field_elements = injective_bytes_to_felts(data);
let hash = PoseidonHasher::hash_no_pad(field_elements);

Features

• std (default): Enables standard library support
• serde: Enables serialization support for types

License

This project is licensed under the MIT-0 License.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.