Custom payment method with gatway integration is only showing "Refund Offline" on credit memo

[glenelkinsdev]

I've created a custom payment method for using the clover gateway via fiserv api, everything is working apart from credit memo refunds, it only shows the "Refund Offline" button.

It appears to be related to the magento RefundAtapter passing $isOnline as false, and i haven't a clue why! There is nothing in the module config that tells magento it's an offline method.

Here is the config.xml, you can see it says is_gateway as true and nothing says it's an offline method:

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
    <default>
        <payment>
            <pillbox_fiserv_clover>
                <active>0</active>
                <model>Pillbox\FiservCloverPayments\Payment\FiservCloverCard</model>
                <order_status>pending</order_status>
                <title>Clover Card Payment</title>
                <group>pillbox_group</group>
                <payment_action>authorize</payment_action>
                <fiserv_api_key></fiserv_api_key>
                <fiserv_api_secret></fiserv_api_secret>
                <fiserv_term_url></fiserv_term_url>
                <fiserv_method_url></fiserv_method_url>
                <challenge_window_size>04</challenge_window_size>
                <can_authorize_vault>1</can_authorize_vault>
                <can_capture_vault>1</can_capture_vault>
                <can_use_vault>1</can_use_vault>
                <can_use_checkout>1</can_use_checkout>
                <can_capture_partial>1</can_capture_partial>
                <can_authorize>1</can_authorize>
                <can_capture>1</can_capture>
                <can_use_internal>0</can_use_internal>
                <can_refund_partial_per_invoice>1</can_refund_partial_per_invoice>
                <can_refund>1</can_refund>
                <can_void>1</can_void>
                <can_cancel>1</can_cancel>
                <can_edit>1</can_edit>
                <can_review_payment>1</can_review_payment>
                <can_deny_payment>1</can_deny_payment>
                <environment>sandbox</environment>
                <is_gateway>1</is_gateway>
                <rest_key></rest_key>
                <active_3ds>1</active_3ds>
            </pillbox_fiserv_clover>
            <pillbox_fiserv_clover_vault>
                <active>0</active>
                <model>Pillbox\FiservCloverPayments\Payment\FiservCloverCardVault</model>
                <title>Clover Saved Cards</title>
                <group>pillbox_group</group>
                <require_cvv>1</require_cvv>
                <active_3ds>1</active_3ds>
            </pillbox_fiserv_clover_vault>
        </payment>
    </default>
</config>

It seems to be something to do with the magento RefundAdapter it passes $isOnline as false:

So in the payment model refund() method $creditmemo->getDoTransaction() is returning false / null

[m2-assistant]

Hi @glenelkinsdev. Thank you for your report.
To speed up processing of this issue, make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce.

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