use std::str::FromStr;

use std::num::ParseIntError;

#[derive(Debug)]
struct BlockReference {
    multi_hash: String,
}

impl FromStr for BlockReference {
    type Err = ParseIntError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        Ok(BlockReference { multi_hash: s.to_string() })
    }
}

fn main() {
    let block_reference: BlockReference = "QmWATWQ7fVPP2EFGu71UkfnqhYXDYH566qy47CnJDgvs8u".parse().unwrap();
    println!("{:?}", block_reference);
}