Three bugs

@david
The order currency is stored natively by WooCommerce, even when our product is not used. It’s true that, in basic WooCommerce, the order currency, when the order is placed, always matches the base currency, but that’s more of a coincidence than an ideal logic. This integration plugin should always take the order currency, and it can be done easily by using standard WooCommerce calls (see below).

Fix for the currency issue
Modify method Affiliates_WooCommerce_Light_Integration::woocommerce_checkout_order_processed() to take the order currency, as follows.

Original code

public static function woocommerce_checkout_order_processed( $order_id ) {
	$order_total        = get_post_meta( $order_id, '_order_total', true );
	$order_tax          = get_post_meta( $order_id, '_order_tax', true );
	$order_shipping     = get_post_meta( $order_id, '_order_shipping', true );
	$order_shipping_tax = get_post_meta( $order_id, '_order_shipping_tax', true );

	$order_subtotal = $order_total - $order_tax - $order_shipping - $order_shipping_tax;

	$currency       = get_option( 'woocommerce_currency' );

Fixed code

public static function woocommerce_checkout_order_processed( $order_id ) {
	$order = new WC_Order( $order_id );

	$order_total        = get_post_meta( $order_id, '_order_total', true );
	$order_tax          = get_post_meta( $order_id, '_order_tax', true );
	$order_shipping     = get_post_meta( $order_id, '_order_shipping', true );
	$order_shipping_tax = get_post_meta( $order_id, '_order_shipping_tax', true );

	$order_subtotal = $order_total - $order_tax - $order_shipping - $order_shipping_tax;

	// Get the currency from the order, rather than the base one
	$currency       = $order->get_order_currency();

hi Diego! i need get the subtotal

<?php echo $order->get_subtotal();?> dont work for me