Rust merkle csv generator

gistfile1.txt

extern crate rand;
extern crate csv;

use rand::Rng;
use std::fs::File;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let n = 1000; 
    let output_file = "large.csv";

    let mut wtr = csv::Writer::from_writer(File::create(output_file)?);

    wtr.write_record(&["address", "amount"])?;

    for _ in 0..n {
        let address = generate_ethereum_address();
        let amount = generate_random_amount();

        wtr.write_record(&[&address, &amount.to_string()])?;
    }

    wtr.flush()?;
    println!("Generated {}", output_file);
    Ok(())
}

fn generate_ethereum_address() -> String {
    let mut rng = rand::thread_rng();
    let address: String = (0..40)
        .map(|_| {
            let choice = rng.gen_range(0..16);
            std::char::from_digit(choice, 16).unwrap()
        })
        .collect();

    format!("0x{}", address)
}


fn generate_random_amount() -> u32 {
    let mut rng = rand::thread_rng();
    rng.gen_range(1..1000) // Generate a random positive number between 1 and 999
}