index.js

import { MerkleTree } from "merkletreejs";
import keccak256 from "keccak256";

const eligibleAirdropParticipants = [
  "Musab",
  "Scoutan",
  "Node",
  "Dolapo",
  "Gogo",
];

const leaves = eligibleAirdropParticipants.map((name) => keccak256(name));
const tree = new MerkleTree(leaves, keccak256);
const root = tree.getHexRoot();

//Proof verification function for any leaf

function checkIfNameIsValid(name) {
  const nameHash = keccak256(name).toString("hex");
  const nameProof = tree.getProof(nameHash);
  const isNameValid = tree.verify(nameProof, nameHash, root);
  if (isNameValid == true) {
    console.log(`${name} is valid`);
  } else {
    console.log(`${name} is invalid`);
  }
}

checkIfNameIsValid("Musab");
checkIfNameIsValid("Scoutan");
checkIfNameIsValid("Node");
checkIfNameIsValid("Dolapo");
checkIfNameIsValid("Gogo");
checkIfNameIsValid("Augustine");