> For the complete documentation index, see [llms.txt](https://docs.quipuswap.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/callbacks.md).

# 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="/pages/85Mhe37PiJmVnsBp2HrP" %}
[launch\_callback](/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/callbacks/launch_callback.md)
{% endcontent-ref %}

{% content-ref url="/pages/8bb83crBRO11OZ96eAR1" %}
[flash\_swap\_callback](/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/callbacks/flash_swap_callback.md)
{% endcontent-ref %}

{% content-ref url="/pages/c2r8PTNqQ9oBOp4qnYEE" %}
[close](/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/callbacks/close.md)
{% endcontent-ref %}