Gravity Forms: Action on payment complete for stripe and paypal standard

gf_hooks.php

<?php
// Both of these work

// @hook do_action( 'gform_stripe_fulfillment', $session, $entry, $feed, $form );
function bpc_debug_stripe( $session, $entry, $feed, $form ) {
	error_log( 'Payment received for STRIPE' );
}
add_action( 'gform_stripe_fulfillment', 'bpc_debug_stripe', 20, 4 );

// @hook do_action( 'gform_paypal_fulfillment', $entry, $feed, $transaction_id, $amount )
function bpc_debug_paypal( $entry, $feed, $transaction_id, $amount ) {
	error_log( 'Payment received for PAYPAL' );
}
add_action( 'gform_paypal_fulfillment', 'bpc_debug_paypal', 20, 4 );