Attempting to run a Ajax request from a checkout kind in woocommerce by way of a customized plugin

I’ve a customized plugin with the next code

add_action( 'init', 'my_script_enqueuer' );

operate my_script_enqueuer() {
   wp_register_script( "gift_card_redeem", WP_PLUGIN_URL.'/plugin-folder/gift_card_redeem.js', array('jquery') );
   wp_localize_script( 'gift_card_redeem', 'myAjax', array( 'ajaxurl' => admin_url( 'admin-ajax.php' )));        

   wp_enqueue_script( 'jquery' );
   wp_enqueue_script( 'gift_card_redeem' );

}

add_action("wp_ajax_gift_card_redeem", "gift_card_redeem");

operate gift_card_redeem(){

  if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
    error_log("test !empty");
    $outcome['type'] = "success";
    $outcome = json_encode($outcome);
    echo $outcome;
  }
  else {
    error_log("test else");
      header("Location: ".$_SERVER["HTTP_REFERER"]);
  }

  die();
}

and a js file within the plugin referred to as gift_card_redeem.js

jQuery(doc).prepared(operate () {
  jQuery(".redeem_gift_card").click on(operate (e) {
    e.preventDefault();

    jQuery.ajax({
      sort: "post",
      dataType: "json",
      url: myAjax.ajaxurl,
      knowledge: { motion: "redeem_gift_card" },
      success: operate (response) {
        if (response.sort == "success") {
          jQuery("#test").html(response);
        } else {
          alert("something broke");
        }
      },
    });
  });
});

and my php and html on the form-checkout web page is as follows

<?php
    $hyperlink = admin_url('admin-ajax.php?motion=gift_card_redeem');
        echo '<a category="redeem_gift_card" href="' . $link . '" >take a look at</a>';
    ?> 

    <h1 id="test">Check</h1>

I get a 400 unhealthy request error for admin-ajax.php and I’m not fairly positive why. Any assist can be enormously appreciated.

Thanks