rng_from_fxhash.rs

// need libs: rand + bs58
use rand::rngs::StdRng;

fn rng_from_fxhash(hash: String) -> impl Rng {
  let mut bs = [0; 32];
  let max_chars = 43; // hack to not overflow the bs array
  bs58::decode(
    hash.chars().skip(2).take(max_chars).collect::<String>(),
  )
  .into(&mut bs)
  .unwrap();
  let rng = StdRng::from_seed(bs);
  return rng;
}