Display the WooCommerce order received total in fiat and/or crypto

This snippet will display the total on the order received page in fiat and / or crypto.

Configure the currency_id on line 8 to change currency.
Switch the comments between 30 and 31 to switch how the total is shown.

/**
	@brief		On the order received page, shows the total in fiat+crypto or just crypto.
	@since		2018-11-07 18:21:07
**/
function mcc_woocommerce_get_order_item_totals( $total_rows, $order, $tax_display )
{
	// Display the total in ETH
	$currency_id = 'ETH';

	// Is MCC installed?
	if ( ! function_exists( 'mycryptocheckout' ) )
		return $total_rows;

	if ( ! isset( $total_rows[ 'order_total' ] ) )
		return $total_rows;

	// Retrieve all of our currencies.
	$currencies = MyCryptoCheckout()->currencies();
	$currency = $currencies->get( $currency_id );
	// Is this currency known?
	if ( ! $currency )
		return $total_rows;

	$total = $order->get_total();

	$new_price = $currency->convert( get_woocommerce_currency(), $total );
	$new_total = $new_price  . ' ' . $currency_id;

	// This displays FIAT / CRYPTO.
	$total_rows[ 'order_total' ][ 'value' ] .= ' / ' . $new_total;

	// This displays only CRYPTO.
	// $total_rows[ 'order_total' ][ 'value' ] = $new_total;

	return $total_rows;
}
add_filter( 'woocommerce_get_order_item_totals', 'mcc_woocommerce_get_order_item_totals', 10, 3 );