Custom block on success page for my Payment Method

Question

I'm developing a custom payment method and I'd like it to show some info (related to the payment method) on the success page.

How can I do this?

I've tried appending the block to the checkout_onepage_success content but I got nothing but errors.

<checkout_onepage_success translate="label">
    <reference name="content">
        <reference name="checkout.success">
            <action method="setChild">
                <block type="checkbuy/success" name="checkbuy.success" template="checkbuy/success.phtml" />
            </action>
        </reference>
    </reference>
</checkout_onepage_success>

EDIT: I also tried using <action method="append"> but it caused big PHP errors.

EDIT 2: I need the block only to be shown when my payment method is selected, I don't want to override the standard success page if the client uses other payment method.

Answer 1

Pleas try this:

<checkout_onepage_success translate="label">
    <reference name="content">
        <reference name="checkout.success">
                <block type="checkbuy/success" name="checkbuy.success" template="checkbuy/success.phtml" />
        </reference>
    </reference>
</checkout_onepage_success>

Then on succcess.phtml call this child block by

<?php echo $this->getChildHtml(checkbuy.success) ;?>

Answer 2

I found it!!

I was overriding the layout to checkout_onepage_success and that was the reason my block was showing in every payment method. So I defined the layout just for my module's payment success page and called the standard onepage_success block for checkout and then my custom information block.

Here's my final layout file:

<checkbuy_payment_success translate="label">
    <reference name="root">
        <action method="setTemplate">
            <template>page/1column.phtml</template>
        </action>
    </reference>
    <reference name="content">
        <block type="checkout/onepage_success" name="checkout.success" template="checkout/success.phtml"/>
        <block type="checkbuy/success" name="checkbuy.success" />
    </reference>
</checkbuy_payment_success>