create3 0.1.0

A library for calculating the address of contracts deployed via CREATE3.
Documentation 
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use create3::{calc_addr, generate_salt, generate_salt_suffix};
use std::io::{self, Write};

fn main() {
    println!("\x1b[32m=========================\x1b[0m");
    println!("\x1b[32m=  CREATE3 ADDRESS TOOL  =\x1b[0m");
    println!("\x1b[32m=========================\x1b[0m");

    loop {
        println!("\n\x1b[36mWhat would you like to do?\x1b[0m");
        println!("\x1b[33m1. Generate CREATE3 address\x1b[0m");
        println!("\x1b[33m2. Generate salt for prefixed address\x1b[0m");
        println!("\x1b[33m3. Generate optimised suffix for prefixed address and salt\x1b[0m");
        print!("\x1b[36mEnter your choice (1/2/3):\x1b[0m ");
        io::stdout().flush().unwrap();

        let mut choice = String::new();
        io::stdin().read_line(&mut choice).unwrap();
        let choice = choice.trim();

        match choice {
            "1" => {
                print!("\x1b[36mEnter deployer address (with '0x' prefix):\x1b[0m ");
                io::stdout().flush().unwrap();
                let mut deployer = String::new();
                io::stdin().read_line(&mut deployer).unwrap();
                let deployer = deployer.trim().trim_start_matches("0x");

                print!("\x1b[36mEnter salt (utf8):\x1b[0m ");
                io::stdout().flush().unwrap();
                let mut salt = String::new();
                io::stdin().read_line(&mut salt).unwrap();
                let salt = salt.trim();

                let address = calc_addr(&hex::decode(deployer).unwrap(), salt.as_bytes());
                println!(
                    "\x1b[32mCREATE3 address:\x1b[0m 0x{}",
                    hex::encode(&address)
                );
                break;
            }
            "2" => {
                print!("\x1b[36mEnter deployer address (with '0x' prefix):\x1b[0m ");
                io::stdout().flush().unwrap();
                let mut deployer = String::new();
                io::stdin().read_line(&mut deployer).unwrap();
                let deployer = deployer.trim().trim_start_matches("0x");

                print!("\x1b[36mEnter prefix (without '0x' prefix):\x1b[0m ");
                io::stdout().flush().unwrap();
                let mut prefix = String::new();
                io::stdin().read_line(&mut prefix).unwrap();
                let prefix = prefix.trim();

                let salt = generate_salt(&hex::decode(deployer).unwrap(), prefix);
                println!(
                    "\x1b[32mSalt for prefix {}:\x1b[0m 0x{}",
                    prefix,
                    hex::encode(&salt)
                );
                break;
            }
            "3" => {
                print!("\x1b[36mEnter deployer address (with '0x' prefix):\x1b[0m ");
                io::stdout().flush().unwrap();
                let mut deployer = String::new();
                io::stdin().read_line(&mut deployer).unwrap();
                let deployer = deployer.trim().trim_start_matches("0x");

                print!("\x1b[36mEnter salt (utf8):\x1b[0m ");
                io::stdout().flush().unwrap();
                let mut salt = String::new();
                io::stdin().read_line(&mut salt).unwrap();
                let salt = salt.trim();

                print!("\x1b[36mEnter prefix (without '0x' prefix):\x1b[0m ");
                io::stdout().flush().unwrap();
                let mut prefix = String::new();
                io::stdin().read_line(&mut prefix).unwrap();
                let prefix = prefix.trim();

                let salt = generate_salt_suffix(&hex::decode(deployer).unwrap(), salt, prefix);
                println!(
                    "\x1b[32mSalt for prefix {}:\x1b[0m 0x{}",
                    prefix,
                    hex::encode(&salt)
                );
                break;
            }
            _ => {
                println!("\x1b[31Invalid choice, please try again.\x1b[0m");
            }
        }
    }
}