[Help] Gateway callback convert Currency

[lamjed001]

I made my own payment gateway and used this for currency conversion but I have a problem, the amount remains the same after the conversion

For example product price is 5$ with usd currency and 4€ for euro currency
and in callback i posted 5$ and currency=USD but my account is using euro currency
and the result is 5 not 4 please give me solution and thanks ♥

<?php
require_once __DIR__ . '/../../../init.php';
require_once __DIR__ . '/../../../includes/gatewayfunctions.php';
require_once __DIR__ . '/../../../includes/invoicefunctions.php';

$gatewayModuleName = basename(__FILE__, '.php');
$gatewayParams = getGatewayVariables($gatewayModuleName);

$paymentAmount=5.00;
$invoiceId=1;
$invoice = WHMCS\Billing\Invoice::find($invoiceId);
$userCurrency = getCurrency($invoice->clientId);
if ($userCurrency["code"] != "EUR") {
    $paymentCurrencyID = WHMCS\Database\Capsule::table("tblcurrencies")->where("code", "EUR")->value("id");
    if (is_null($paymentCurrencyID)) {
        logTransaction($gatewayParams['name'], $_POST, "Unsuccessful - Invalid Currency");
        exit;
    }
    $paymentAmount = convertCurrency($paymentAmount, $paymentCurrencyID, $userCurrency["id"]); //Here the result is the same amount sent
}
?>

 

Edited December 21, 2020 by lamjed001
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[lamjed001]

Issue Fixed
Just change Base Conv. Rate for your Currencie

[jipd]

 

Please what is the base conversation rate for Nigeria and how can I get for other countries too