//! Example of converting `U256` to native Rust types.

use alloy::primitives::{utils::format_units, U256};

use eyre::Result;

/// `U256` provides useful conversion functions to enable transformation into native Rust types.

///

/// It is important to note that converting a big-number to a floating point type (such as a `f32`

/// or `f64`) can result in a loss of precision, since you cannot fit 256 bits of information into

/// 64 bits.

///

/// However, there may be cases where you want to perform conversions for presentation purposes.

/// For example, you may want to display a large number to the user in a more readable format.

fn main() -> Result<()> {

let num = U256::from(42_u8);

let a: u128 = num.to::<u128>();

assert_eq!(a, 42);

let b: u64 = num.to::<u64>();

assert_eq!(b, 42);

let c: u32 = num.to::<u32>();

assert_eq!(c, 42);

let d: usize = num.to::<usize>();

assert_eq!(d, 42);

let e: String = num.to_string();

assert_eq!(e, "42");

let f: String = format_units(num, 4)?;

assert_eq!(f, "0.0042");

Ok(())

}