AutomateWoo - Change workflow generated coupon lengths (since v3.3.0)

functions.php

<?php

add_filter( 'automatewoo/coupon_generator/key_length', 'my_filter_automatewoo_coupon_length', 10, 2 );

/**
 * @param int $length
 * @param AutomateWoo\Coupon_Generator $generator
 * @return int
 */
function my_filter_automatewoo_coupon_length( $length, $generator ) {
	// please note that this length excludes the length of the coupon prefix
	return 8;
}