# Callbacks

This section describes callbacks that can be called only by this contract during execution of main entrypoints.  A contract have only 3 callbacks:

{% content-ref url="callbacks/launch\_callback" %}
[launch\_callback](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/callbacks/launch_callback)
{% endcontent-ref %}

{% content-ref url="callbacks/flash\_swap\_callback" %}
[flash\_swap\_callback](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/callbacks/flash_swap_callback)
{% endcontent-ref %}

{% content-ref url="callbacks/close" %}
[close](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/callbacks/close)
{% endcontent-ref %}