function add_refund_javascript( $payment_id ) {
  _edd_deprecated_function( __FUNCTION__, '3.0', null, debug_backtrace() );

  $payment = edd_get_payment( $payment_id );

  if ( ! $payment || 'paypal_commerce' !== $payment->gateway ) {
    return;
  }

  $mode = ( 'live' === $payment->mode ) ? API::MODE_LIVE : API::MODE_SANDBOX;

  try {
    $api = new API( $mode );
  } catch ( Exceptions\Authentication_Exception $e ) {
    // If we don't have credentials.
    return;
  }

  $label = __( 'Refund Transaction in PayPal', 'easy-digital-downloads' );
  ?>
	<script type="text/javascript">
		jQuery( document ).ready( function ( $ ) {
			$( 'select[name=edd-payment-status]' ).change( function () {
				if ( 'refunded' === $( this ).val() ) {
					$( this ).parent().parent().append( '<input type="checkbox" id="edd-paypal-commerce-refund" name="edd-paypal-commerce-refund" value="1" style="margin-top:0">' );
					$( this ).parent().parent().append( '<label for="edd-paypal-commerce-refund"><?php echo esc_html( $label ); ?></label>' );
				} else {
					$( '#edd-paypal-commerce-refund' ).remove();
					$( 'label[for="edd-paypal-commerce-refund"]' ).remove();
				}
			} );
		} );
	</script>
	<?php
}