array-buffer-to-hex/index.js

Turn an `ArrayBuffer` into a string of hexadecimal characters.

module.exports = function arrayBufferToHex (arrayBuffer) {
  if (typeof arrayBuffer !== 'object' || arrayBuffer === null || typeof arrayBuffer.byteLength !== 'number') {
    throw new TypeError('Expected input to be an ArrayBuffer')
  }

  var view = new Uint8Array(arrayBuffer)
  var result = ''
  var value

  for (var i = 0; i < view.length; i++) {
    value = view[i].toString(16)
    result += (value.length === 1 ? '0' + value : value)
  }

  return result
}