js-waku/src/lib/discovery/random_subset.ts

import { shuffle } from "@chainsafe/libp2p-gossipsub/utils/shuffle";

export function getPseudoRandomSubset<T>(
  values: T[],
  wantedNumber: number
): T[] {
  if (values.length <= wantedNumber) {
    return values;
  }

  return shuffle(values).slice(0, wantedNumber);
}