erc-5564-rs

Uses the arkworks-rs suite of libraries, and utilities from rln

Existing Implementations

1. ark_bn254
2. ark_bls_12_381
3. ark_bls_12_377
4. secp256k1

Usage

use erc_5564_rs::{StealthAddressOnCurve};
use ark_bn254::Bn254; // or ark_bls_12_381::Bls12_381 or ark_bls_12_377::Bls12_377, or erc_5564_rs::Secp256k1

fn main() {
    let (spending_key, spending_public_key) = Bn254::random_keypair();
    let (viewing_key, viewing_public_key) = Bn254::random_keypair();

    // generate ephemeral keypair
    let (ephemeral_private_key, ephemeral_public_key) = Bn254::random_keypair();

    let (stealth_commitment, view_tag) = Bn254::generate_stealth_commitment(viewing_public_key, spending_public_key, ephemeral_private_key);

    let stealth_private_key_opt = Bn254::generate_stealth_private_key(ephemeral_public_key, viewing_key, spending_key, view_tag);

    if stealth_private_key_opt.is_none() {
        panic!("View tags did not match");
    }

    let derived_commitment = Bn254::derive_public_key(stealth_private_key_opt.unwrap());
    assert_eq!(derived_commitment, stealth_commitment);
}

Building and Testing

1. Building cargo build --release --features <bn254/bls12_381/bls12_377/secp256k1>

2. Testing cargo test --release --features <bn254/bls12_381/bls12_377/secp256k1>

FFI Api

The exposed FFI API supports all curves, prefixed by the curve name. Ensure that the correct feature is enabled when building the library.

Precompiled Libraries

Check out the nightly releases.

Attribution

• The original circuits for rln are located here, by the PSE group
• Inspired by the erc-5564 eip and the poc by Nerolation.