src/utils/index.js
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;
}
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;
}
from ethereumjs-util