zaru-core 0.1.0

A secure payment model engine with transaction state machine and cryptographic verification
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use ed25519_dalek::{Signature, Signer, SigningKey, Verifier, VerifyingKey};
use rand::rngs::OsRng;

// --KeyPair --
#[derive(Debug)]
pub struct Keypair {
    pub signing: SigningKey,
    pub verifying: VerifyingKey,
}

impl Keypair {
    pub fn generate() -> Self {
        let signing = SigningKey::generate(&mut OsRng);
        let verifying = signing.verifying_key();

        Self { signing, verifying }
    }

    pub fn sign(&self, message: &[u8]) -> Signature {
        self.signing.sign(message)
    }
}

// -- VERIFY --

pub fn verify(public_key: &VerifyingKey, message: &[u8], signature: &Signature) -> bool {
    public_key.verify(message, signature).is_ok()
}