basic example of serializing a message, signing it, and verifying it

cargo.toml

[package]
name = "signatures"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
bls-signatures = "0.15.0"
rand = "0.8.5"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0.111"

main.rs

use bls_signatures::PrivateKey;
use rand::thread_rng;
use serde::{Deserialize, Serialize};

#[derive(Deserialize, Serialize)]
struct Transaction {
    from: String,
    to: String,
    amount: i128,
}

fn main() {
    let private = PrivateKey::generate(&mut thread_rng());
    let private2 = PrivateKey::generate(&mut thread_rng());
    let public = private.public_key();
    //println!("{private:?}, {public:?}");

    let message = Transaction {
        amount: 100,
        from: String::from("Test"),
        to: String::from("You"),
    };

    let serialized_message = serde_json::to_string(&message).unwrap();

    let sig = private.sign(&serialized_message);

    let verification = public.verify(sig, &serialized_message);

    println!("Is the message authentic? {}", verification);

    let deserialized_message: Transaction = serde_json::from_str(&serialized_message).unwrap();

    println!("{}", deserialized_message.amount);
}