utils.rs

use std::time::{SystemTime, UNIX_EPOCH};
use web3::types::U256;

pub fn get_nstime() -> u64 {
    let dur = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
    // The correct way to calculate the current time is
    // `dur.as_secs() * 1_000_000_000 + dur.subsec_nanos() as u64`
    // But this is faster, and the difference in terms of entropy is
    // negligible (log2(10^9) == 29.9).
    dur.as_secs() << 30 | dur.subsec_nanos() as u64
}

pub fn wei_to_eth(wei_val: U256) -> f64 {
    let res = wei_val.as_u128() as f64;
    res / 1_000_000_000_000_000_000.0
}

pub fn eth_to_wei(eth_val: f64) -> U256 {
    let result = eth_val * 1_000_000_000_000_000_000.0;
    let result = result as u128;

    U256::from(result)
}