Workaround for compatibility between B2B Market and Discount Rules and Dynamic Pricing for WooCommerce

discount-rules-and-b2b-market.php

<?php
/*
 * Fix discounts not working for guests in cart/checkout
 * Rules defined in: Discount Rules and Dynamic Pricing for WooCommerce
 * Disables price rules in: B2B Market
 */
function sg_fix_discount_rules_for_guests() {
	$guest_group    = get_option( 'bm_guest_group' );
	$customer_group = get_option( 'bm_customer_group' );
	$group_id       = BM_Conditionals::get_validated_customer_group();

	// Disable B2B Market discount rules for guests and customers
	if ( ! is_user_logged_in() ||
		$group_id === $guest_group ||
		$group_id === $customer_group ) {
		return true;
	}

	return false;
}
add_filter( 'bm_force_product_price', 'sg_fix_discount_rules_for_guests' );

/*
 * Disable all B2B Market global or group pricing rules
 * Keep B2B Market product rules per product intact
 */
function sg_disable_b2b_group_pricing_rules( $group_prices ) {
	$group_prices['global'] = [];
	$group_prices['group']  = [];

	return $group_prices;
}
add_filter( 'bm_group_prices', 'sg_disable_b2b_group_pricing_rules' );
add_filter( 'bm_bulk_prices', 'sg_disable_b2b_group_pricing_rules' );