> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sqd.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# On the FireSquid release

> Migration guide for the FireSquid release — archive and data request interface changes

Actions are needed if:

1. You're relying on a squid that's using an older SDK version. One way to know that is to look at the signatures of the data requesting methods (`.addEvent()`, `.addLog()` etc): if call signatures are different from what you see in the docs ([EVM](/en/sdk/squid-sdk/evm/reference/evm-stream#data-requests), [Substrate](/en/sdk/squid-sdk/substrate/reference/substrate-processor/data-requests)), then you need to migrate to the modern [SDK](/en/sdk/overview).

2. You're relying on a GraphQL API of an older archive. Your options are:

   * To rely on SQD Network instead. See its [reference documentation](/en/network/overview) for info on available datasets and the API used to access them.
   * To fork an older archive setup and maintain it yourself. For EVM you can just fork [the repo](https://github.com/subsquid/eth-archive). If you would like to do the same for the Substrate archives, that'd require pulling some old code out of the repos' history. Ping us in the [SquidDevs TG chat](https://t.me/HydraDevs).