How to add new rules in Conditional Discounts for WooCommerce extension ?

wad.php

<?php
//Step 1 : Added of the condition "If customer ZIP code".
add_filter( "wad_get_discounts_conditions", "get_discount_rule_conditions" );
function get_discount_rule_conditions($conditions){ 
  $conditions['customer-zip-code'] = __("If customer ZIP code", "wad");
  return $conditions;
}
//Step 2 : Added of operators "Start with" and "Doesn't start with".
add_filter( "wad_operators_fields_match", "get_discount_rule_operators", 10, 3 );
function get_discount_rule_operators($operator_fields, $condition, $selected_value){
   $selected_value = array( 
     "START WITH" => __("START WITH", "wad"),
     "NOT START WITH" => __("NOT START WITH", "wad"),
   );
   $operator_fields['customer-zip-code'] = $selected_value;
   return $operator_fields;
}

//Step 3 : Added of the match field values
add_filter( "wad_fields_values_match", "get_discount_rule_values", 10, 3 ); 
function get_discount_rule_values($fields_values, $condition, $selected_value){ 
   $text_field = '<input type="text" placeholder="'.__('unique value ,', 'wad').'" name="'.'o-discount[rules][{rule-group}][{rule-index}][value]'.'" value="' . $selected_value . '" required>';
   $fields_values['customer-zip-code'] = $text_field;
   return $fields_values;
 }

//Step 4 : Added of evaluable conditions for getting the discounts
 add_filter('wad_get_evaluable_condition','get_discount_evaluable_conditions',10,3);
 function get_discount_evaluable_conditions($condition_is_valid, $rule , $product_id){
	if ($rule["condition"] == 'customer-zip-code'){
		$customer_postcode = wad_get_customer_postcode();
		$values = explode(',', $rule['value']);
		$condition_is_valid = false;
		$postcode_is_valid = in_array($customer_postcode,$values);
		if ($rule["operator"] == 'START WITH' && $postcode_is_valid){
			$condition_is_valid=true;
		}elseif($rule["operator"] == 'NOT START WITH' && $postcode_is_valid){
			$condition_is_valid=true;
		}
	}
	return $condition_is_valid;
 }


 //Step 5 : Added of control to check if discounts rules is valid. 
add_filter('wad_is_applicable','get_rules_validity',10,3);
function get_rules_validity($is_valid, $discount_obj, $product_id){
	$is_valid = false;
	if($discount_obj->rules_verified===true){
		$is_valid = true;
	}
	return $is_valid;
};

 /**
  * This function allow to get the customer postcode who is buying.
  *
  * @return string
  */
 function wad_get_customer_postcode(){
	global $woocommerce;
	$customer_postcode = $woocommerce->customer->get_billing_postcode();
	return $customer_postcode;
 }