Gravity Forms: Change Stripe receipt description.

functions.php

/* Change the description of Gravity Forms/Stripe Form Stripe Receipt (product)
----------------------------------------------------------------------------------------*/
add_filter( 'gform_stripe_charge_description', 'ag_custom_product_receipt', 10, 4 );
function ag_custom_product_receipt( $description, $strings, $entry, $submission_data ) {

	$payment_amount =  rgar( $submission_data, 'payment_amount' );

	$description = "Payment Amount: " . $payment_amount;

	GFCommon::log_debug( __METHOD__ . "(): Custom description for the product: " . $description );
 
    return $description;
}