From 3bed970948a2a0ceee3adb6efe950fe5aedfeb03 Mon Sep 17 00:00:00 2001
From: EchoLoGeek <73399671+EchoLoGeek@users.noreply.github.com>
Date: Mon, 3 Mar 2025 11:24:33 +0100
Subject: [PATCH] Remain to pay in multicurrency

If I want to have the remainder to pay in foreign currency, I must deduct it from the amount in multicurrency, not the amount in conf->currency
---
 htdocs/core/class/commoninvoice.class.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/htdocs/core/class/commoninvoice.class.php b/htdocs/core/class/commoninvoice.class.php
index 321533eb28d..cc759fa89af 100644
--- a/htdocs/core/class/commoninvoice.class.php
+++ b/htdocs/core/class/commoninvoice.class.php
@@ -286,7 +286,12 @@ abstract class CommonInvoice extends CommonObject
 		$alreadypaid += $this->getSumDepositsUsed($multicurrency);
 		$alreadypaid += $this->getSumCreditNotesUsed($multicurrency);
 
-		$remaintopay = price2num($this->total_ttc - $alreadypaid, 'MT');
+		if((int) $multicurrency > 0){
+			$totalamount = $this->multicurrency_total_ttc;
+		} else {
+			$totalamount = $this->total_ttc;
+		}
+		$remaintopay = price2num($totalamount - $alreadypaid, 'MT');
 		if ($this->status == self::STATUS_CLOSED && $this->close_code == 'discount_vat') {		// If invoice closed with discount for anticipated payment
 			$remaintopay = 0.0;
 		}