Constant ONE_ETHER
pub const ONE_ETHER: u128 = 1_000_000_000_000_000_000; // 1_000_000_000_000_000_000u128Expand description
1 ether = 10^18 wei
pub const ONE_ETHER: u128 = 1_000_000_000_000_000_000; // 1_000_000_000_000_000_000u1281 ether = 10^18 wei