Function random64

ch7-happycoin-as/happycoin.ts:5–8

()

const randArr64 = new Uint64Array(1);
const randArr8 = Uint8Array.wrap(randArr64.buffer, 0, 8); // <2>
function random64(): u64 {
  crypto.getRandomValues(randArr8); // <3>
  return randArr64[0];
}

function sumDigitsSquared(num: u64): u64 {
  let total: u64 = 0;