code: function padToEven(value) {
    var a = value; // eslint-disable-line
  
    if (typeof a !== 'string') {
      throw new Error(`[ethjs-util] while padding to even, value must be string, is currently ${typeof a}, while padToEven.`);
    }
  
    if (a.length % 2) {
      a = `0${a}`;
    }
  
    return a;
  }
docs: Pads a `String` to have an even length
  @param {String} value
  @return {String} output