This is an example plugin that enables commerce currency rates to be updated with live rates from the fixer.io api.

1. Copy the currencyrates folder into your craft/plugins folder.

2. Click install on the plugin within settings > plugins

3. Make a currencyrates.php file in your craft/config/ directory with the following:

<?php
return [
    'secret' => '123'
];

4. Replace 123 from the file above with a long unique password or hash.

5. Set up a cron job to hit this url:

http://yourdomain.dev/actions/currencyRates/update/rates?code=123

6. Notice the code=123. Replace 123 with the unique password that you populated in step 4.

7. Set the cron to hit that url periodically. The example below is a cron command which hits the url every 24 hours at midnight:

0 0 * * * wget -O - http://yourdomain.dev/actions/currencyRates/update/rates?code=123 >/dev/null 2>&1

You can manually visit the url to test the rates are updated correctly before setting up your cron job.

The plugin uses the http://fixer.io/ api for the live rates.

Fixer.io is a free JSON API for current and historical foreign exchange rates published by the European Central Bank.

The rates are updated daily around 4PM CET.