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  1. import crypto from 'crypto';
  2. const rnds8Pool = new Uint8Array(256); // # of random values to pre-allocate
  3. let poolPtr = rnds8Pool.length;
  4. export default function rng() {
  5. if (poolPtr > rnds8Pool.length - 16) {
  6. crypto.randomFillSync(rnds8Pool);
  7. poolPtr = 0;
  8. }
  9. return rnds8Pool.slice(poolPtr, poolPtr += 16);
  10. }