Function ethers_core::utils::parse_ether

pub fn parse_ether<S>(eth: S) -> Result<U256, S::Error> where
    S: TryInto<U256>, 

Converts the input to a U256 and converts from Ether to Wei.

use ethers::{types::U256, utils::{parse_ether, WEI_IN_ETHER}};

let eth = U256::from(WEI_IN_ETHER);
assert_eq!(eth, parse_ether(1u8).unwrap());
assert_eq!(eth, parse_ether(1usize).unwrap());
assert_eq!(eth, parse_ether("1").unwrap());