code: function ScalarMultiple(bytes, discrim) {
  	var order = ec.curve.n;
  	for (var i = 0; i <= 0xFFFFFFFF; i++) {
  		// We hash the bytes to find a 256 bit number, looping until we are sure it
  		// is less than the order of the curve.
  		var hasher = new Sha512().add(bytes);
  		// If the optional discriminator index was passed in, update the hash.
  		if (discrim !== undefined) {
  			hasher.addU32(discrim);
  		}
  		hasher.addU32(i);
  		var key = hasher.first256BN();
  		/* istanbul ignore next */
  		if (key.cmpn(0) > 0 && key.cmp(order) < 0) {
  			return key;
  		}
  	}
  
  	/* istanbul ignore next */
  	throw new Error('impossible space search)');
  }
docs: Scalar multiplication to find one 256 bit number
  where it is less than the order of the curve.
  @param bytes
  @param discrim
  @returns {*}
  @constructor