function iszero25519()

in src/ristretto255.js [315:326]

• 9 lines of code
• 2 McCabe index (conditional complexity)

function iszero25519(p) {
  // first pack the element which does a final reduction mod 2^255-19,
  // otherwise the element is stored mod 2^256-38 for convenience by nacl.js
  const s = new Uint8Array(32);
  lowlevel.pack25519(s, p);
  // do byte-by-byte comparison
  let res = 1;
  for (let i = 0; i < 32; i++) {
    res &= s[i] === 0;
  }
  return res;
}