Events

RegisterEvent

totalwebcreations\b2bcommerce\events\RegisterEvent, fired by totalwebcreations\b2bcommerce\modules\companies\services\Registration::EVENT_BEFORE_REGISTER.

This is the plugin's one custom, cancelable event. It fires before a frontend registration is processed at all, so you can plug in extra checks — rate limiting, disposable-email blocking, CAPTCHA verification — ahead of the honeypot and the rest of the registration flow (see Companies & teams).

Set $event->isValid = false to cancel; the service then throws with a generic message and creates nothing (no company, no user).

use yii\base\Event;
use totalwebcreations\b2bcommerce\events\RegisterEvent;
use totalwebcreations\b2bcommerce\modules\companies\services\Registration;

Event::on(
    Registration::class,
    Registration::EVENT_BEFORE_REGISTER,
    function (RegisterEvent $event) {
        if (str_ends_with($event->email, '@blocked.example')) {
            $event->isValid = false;
        }
    }
);

The event carries the submitted registration data as public properties:

Property	Type
companyName	string
registrationNumber	?string
taxId	?string
firstName	string
lastName	string
email	string

Native Craft & Commerce events

The plugin does not define any other custom events — everything else is built entirely on native Craft and Commerce extension points, which remain available to your own project or other plugins exactly as documented by Craft/Commerce:

• craft\commerce\services\Payments::EVENT_BEFORE_PROCESS_PAYMENT — the payment-time approval/budget/credit refusal (see Order approvals).
• craft\commerce\elements\Order::EVENT_BEFORE_ADD_LINE_ITEM — the price-visibility and company-catalog add-to-cart vetoes.
• craft\commerce\elements\Order::EVENT_BEFORE_SAVE — the quote/approval line-item freeze guard and the VAT-id checkout passthrough.
• craft\commerce\elements\Order::EVENT_BEFORE_COMPLETE_ORDER — the quote-completion veto, the approval backstop, the account-status backstop, the required-PO-number backstop, the per-member and per-department budget backstops, and the credit-limit backstop, in that registration order.
• craft\commerce\elements\Order::EVENT_AFTER_COMPLETE_ORDER — linking the order to its company, releasing the credit/budget locks, and reconciling any stale-pending approval. Registration order is load-bearing here (see the source comments in src/Plugin.php if you need to hook in between).
• craft\commerce\elements\Order::EVENT_BEFORE_DELETE and craft\commerce\services\Carts::EVENT_BEFORE_PURGE_INACTIVE_CARTS — orphan and purge protection for quote/approval elements and their business records.

If you need to observe or extend plugin behaviour beyond RegisterEvent, hook these native Craft/Commerce events directly rather than looking for a B2B-specific one — none exists for these paths.