# Polkadot Release Analysis v0.9.41 + v0.9.42

**URL:** <https://forum.polkadot.network/t/polkadot-release-analysis-v0-9-41-v0-9-42/2828>\
**Category:** Ecosystem\
**Tags:** release-analysis\
**Created:** [May 11, 2023, 12:13pm UTC](https://forum.polkadot.network/t/polkadot-release-analysis-v0-9-41-v0-9-42/2828 "2023-05-11T12:13:42Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![hectorb](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.polkadot.network/hectorb/32/729_2.png) [@hectorb](https://forum.polkadot.network/u/hectorb)\
**Post date:** [May 24, 2023, 7:31am UTC](https://forum.polkadot.network/t/polkadot-release-analysis-v0-9-41-v0-9-42/2828/3 "2023-05-24T07:31:30Z")

</div>

Appendix for [Polkadot Release Analysis v0.9.41 + v0.9.42](https://forum.polkadot.network/t/polkadot-release-analysis-v0-9-41-v0-9-42/2828):

Potentially, the substrate builders will face some issues with the node’s service (`service.rs`) when upgrading to this release. Here is the list of changes to be taken into account:

### KeyStore overhaul

Replacement of `SyncCryptoStorePtr` to `KeystorePtr`.

Please follow the changes performed on this PR:

> <https://github.com/paritytech/cumulus/pull/2336/files#diff-5b3ed1e5750fd3c75ed8cd988f461ab32cda64cbe5901bcf42bd70ce6ae18919>
>
> Companion for https://github.com/paritytech/substrate/pull/13615

### Rename of `AppKey` to `AppCrypto`

> <https://github.com/paritytech/cumulus/pull/2336/files#diff-5b3ed1e5750fd3c75ed8cd988f461ab32cda64cbe5901bcf42bd70ce6ae18919>
>
> Companion for https://github.com/paritytech/substrate/pull/13615

### Extract syncing protocol from `sc-network`

General context: [Extract syncing protocol from `sc-network` by altonen · Pull Request #12828 · paritytech/substrate · GitHub](https://github.com/paritytech/substrate/pull/12828)

> <https://github.com/paritytech/cumulus/pull/1939/files#diff-5b3ed1e5750fd3c75ed8cd988f461ab32cda64cbe5901bcf42bd70ce6ae18919>

The links listed above redirects to the changes applied on the parachain template. These can be taken as a reference for the update.

---

_[View the full topic](https://forum.polkadot.network/t/polkadot-release-analysis-v0-9-41-v0-9-42/2828)._