# Guides

## Migration guides

{% content-ref url="guides/v9-migration" %}
[v9-migration](https://docs.gains.trade/developer/integrators/guides/v9-migration)
{% endcontent-ref %}

## Calculating borrowing fees

{% content-ref url="guides/calculating-borrowing-fees" %}
[calculating-borrowing-fees](https://docs.gains.trade/developer/integrators/guides/calculating-borrowing-fees)
{% endcontent-ref %}