Rust program that allows a user to input the name or ticker of a cryptocurrency, enter a crypto address, and then check if the address is valid or not for the given cryptocurrency. This example will use basic validations for five cryptocurrencies: Bitcoin (BTC), Ethereum (ETH), Litecoin (LTC), Bitcoin Cash (BCH), and Dogecoin (DOGE). Please note…

crypto address, address is valid or not.txt

use std::collections::HashMap;
use std::io::{self, Write};

fn main() {
    // Define a map for the cryptocurrency tickers
    let mut cryptos: HashMap<&str, &str> = HashMap::new();
    cryptos.insert("BTC", "Bitcoin");
    cryptos.insert("ETH", "Ethereum");
    cryptos.insert("LTC", "Litecoin");
    cryptos.insert("BCH", "Bitcoin Cash");
    cryptos.insert("DOGE", "Dogecoin");

    println!("Welcome to the Crypto Address Validator!");

    // Ask for the cryptocurrency ticker
    print!("Enter the cryptocurrency name or ticker (e.g., BTC, ETH): ");
    io::stdout().flush().unwrap();
    let mut ticker = String::new();
    io::stdin().read_line(&mut ticker).expect("Failed to read line");
    let ticker = ticker.trim().to_uppercase();

    // Check if the ticker is valid
    if let Some(crypto_name) = cryptos.get(ticker.as_str()) {
        println!("You selected: {}", crypto_name);

        // Ask for the cryptocurrency address
        print!("Enter the {} address: ", crypto_name);
        io::stdout().flush().unwrap();
        let mut address = String::new();
        io::stdin().read_line(&mut address).expect("Failed to read line");
        let address = address.trim();

        // Validate the address (simplified)
        let is_valid = validate_address(ticker.as_str(), address);
        if is_valid {
            println!("The address you entered is valid for {}.", crypto_name);
        } else {
            println!("The address you entered is not valid for {}.", crypto_name);
        }
    } else {
        println!("Invalid cryptocurrency ticker or name entered.");
    }
}

// A simplified address validation function
fn validate_address(ticker: &str, address: &str) -> bool {
    match ticker {
        "BTC" => address.len() == 34 && address.starts_with('1') || address.starts_with('3'),
        "ETH" => address.len() == 42 && address.starts_with("0x"),
        "LTC" => address.len() == 34 && address.starts_with('L') || address.starts_with('M'),
        "BCH" => address.len() == 42 && address.starts_with("q") || address.starts_with("p"),
        "DOGE" => address.len() == 34 && address.starts_with('D'),
        _ => false,
    }
}