CurrencyConverterControllerClass.apxc

public with sharing class CurrencyConverterControllerClass{
    
    @AuraEnabled
    public static List<CurrencyInformation__c> allCountries() {
        return [SELECT Id,Name,Code__c, Country__c FROM CurrencyInformation__c];
    }
    
    @AuraEnabled
    public static String getCurrency(String sourceCode,String targetCode) {
        String url = 'https://globalcurrencies.xignite.com/xGlobalCurrencies.json/GetRealTimeRate?Symbol=';
        url += sourceCode+targetCode+'&_token=YOURTOKEN';
        
        // Instantiate a new http object
        Http http = new Http();
        
        // Instantiate a new HTTP request, specify the method (GET) as well as the endpoint
        HttpRequest req = new HttpRequest();
        req.setEndpoint(url);
        req.setMethod('GET');
        
        HttpResponse res = new HttpResponse();
        
        // Send the request, and return a response
        if((sourceCode != null && sourceCode.trim().length() > 0) && (targetCode != null && targetCode.trim().length() > 0))
            res = http.send(req);
        else
            return null;
        
        Map<String, Object> response = (Map<String, Object>)JSON.deserializeUntyped(res.getBody());
        String text = (String)response.get('Text');
                
        return text;
    }
}