Events

The Simpler Checkout extension registers OpenCart events that you can hook into for custom integrations.

Registered Events

The following events are registered during installation.

Event Code	Trigger Point	Purpose
simpler	catalog/controller/common/footer/after	Renders the Simpler checkout button on the page.
simpler	catalog/controller/common/header/after	Injects the Simpler SDK script into the page head.
simpler	catalog/view/common/cart/after	Adds the Simpler button to the minicart.
simpler_caas	catalog/controller/checkout/checkout/before	Redirects to hosted checkout when CaaS is enabled.
simpler_caas_quick	catalog/controller/extension/quickcheckout/checkout/before	Same as above, for quick checkout extensions.

Hooking Into Order Submission

Register your own after event on the submit endpoint to run custom logic when an order is created through Simpler.

Register the event in your module's install() method:

admin/controller/extension/module/mymodule.php

public function install()
{
    $this->load->model('setting/event');
    $this->model_setting_event->addEvent(
        'mymodule_simpler_listener',
        'catalog/controller/extension/module/simpler/v1/submit/after',
        'extension/module/mymodule/onSimplerOrder'
    );
}

Handle the event in your catalog controller:

catalog/controller/extension/module/mymodule.php

public function onSimplerOrder($route, $args, $output)
{
    // $output contains the JSON response string from the submit endpoint.
    // Decode it to access order_id and request_id.
    $data = json_decode($output, true);

    if (isset($data['order_id'])) {
        $order_id = $data['order_id'];
        // Your custom logic here — e.g., sync to ERP, send notifications, etc.
    }
}

info

The same pattern works for other API endpoints. Replace v1/submit with v1/quote, v1/products, or v1/feed to hook into those flows.