# Custom Action

Gateway comes with built in actions but sometime you have to add your own. First you have to define a service:

```yaml
# src/Acme/PaymentBundle/Resources/config/services.yml

services:
    acme.payum.action.foo:
        public: true
        class: Acme\PaymentBundle\Payum\Action\FooAction
```

There are several ways to add it to a gateway:

* Set it explicitly in config.yml.

  ```yaml
  # app/config/config.yml

  payum:
      gateways:
          a_gateway:
              factory: a_factory:
              payum.action.foo: @payumActionServiceId
  ```
* Tag it

  More powerful method is to add a tag `payum.action` to action server. Payum will do the reset. You can define a `factory` attribute inside that tag. In this case the action will be added to all gateways created by requested factory.

  ```yaml
  # app/config/config.yml

  payum:
      gateways:
          a_gateway:
              factory: a_factory
  ```

  ```yaml
  # src/Acme/PaymentBundle/Resources/config/services.yml

  services:
      acme.payum.action.foo:
          class: Acme\PaymentBundle\Payum\Action\FooAction
          public: true
          tags:
              - { name: payum.action, factory: a_factory }

  ```

  If `prepend` set to true the action is added before the rest. If you want to add the action to all configured gateways set `all` to true.

  ```yaml
  # src/Acme/PaymentBundle/Resources/config/services.yml

  services:
      acme.payum.action.foo:
          class: Acme\PaymentBundle\Payum\Action\FooAction
          public: true
          tags:
              - {name: payum.action, prepend: true, all: true }
  ```

***

### Supporting Payum

Payum is an MIT-licensed open source project with its ongoing development made possible entirely by the support of community and our customers. If you'd like to join them, please consider:

* [Become a sponsor](https://github.com/sponsors/Payum)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://payum.gitbook.io/payum/symfony/custom-action-usage.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.