code: function stripZeros(aInput) {
    var a = aInput; // eslint-disable-line
    var first = a[0]; // eslint-disable-line
    while (a.length > 0 && first.toString() === '0') {
      a = a.slice(1);
      first = a[0];
    }
    return a;
  }
docs: from ethereumjs-util