text: 'use strict';
  Object.defineProperty(exports, '__esModule', { value: true });
  exports.fastMerkleRoot = void 0;
  const Buffer = require('safe-buffer').Buffer;
  function fastMerkleRoot(values, digestFn) {
    if (!Array.isArray(values)) throw TypeError('Expected values Array');
    if (typeof digestFn !== 'function')
      throw TypeError('Expected digest Function');
    let length = values.length;
    const results = values.concat();
    while (length > 1) {
      let j = 0;
      for (let i = 0; i < length; i += 2, ++j) {
        const left = results[i];
        const right = i + 1 === length ? left : results[i + 1];
        const data = Buffer.concat([left, right]);
        results[j] = digestFn(data);
      }
      length = j;
    }
    return results[0];
  }
  exports.fastMerkleRoot = fastMerkleRoot;
  