> For the complete documentation index, see [llms.txt](https://docs.soniclabs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.soniclabs.com/technology/release-2.2.md).

# Release v2.2

Sonic release v2.2 adds Gas Subsidies and Bundled Transactions, alongside a larger contract size limit, adopted Ethereum Osaka features, and a set of network performance improvements.

For instructions on upgrading your node to this release, see [Upgrade Instructions (v2.2)](/sonic/node-deployment/upgrade-instructions-v2.2.md).

## New for applications

{% hint style="info" icon="gas-pump" %}
**Gas Subsidies**

Projects can cover gas fees for their users. Users don't need to hold any native S tokens. A sponsor deposits funds, and matching transactions get their fee deducted from that fund instead of the sender's balance. Matching is fine-grained, from a single account-plus-nonce pair up to whole-contract or whole-account sponsorship, so a sponsor can target exactly the transactions they intend to cover.

[Full docs →](/technology/release-2.2/gas-subsidies.md)
{% endhint %}

{% hint style="info" icon="layer-group" %}
**Bundled Transactions**

Multiple transactions can be sent as one unit with a guarantee about how they succeed or fail together. Either all of them go through, or the group is rolled back, with no risk of other traffic being interleaved in between.

[Full docs →](/technology/release-2.2/bundled-transactions.md)
{% endhint %}

{% hint style="info" icon="maximize" %}
**Extended contract code size**

The per-contract code size limit doubles from 24 KiB to 48 KiB, and the init code limit (constructor / contract-creation code) doubles alongside it, from 48 KiB to 96 KiB. Applications can fit more functionality into a single contract, before needing to split anything up.
{% endhint %}

## Osaka Features

Release v2.2 also brings in features from Ethereum's Osaka upgrade:

* **Higher per-transaction gas cap (EIP-7825).** Raises the maximum gas a single transaction can consume.
* **secp256r1 curve support (EIP-7951).** Adds a native precompile for this curve, enabling device-native and passkey-style signing.
* **Updated MODEXP precompile (EIP-7823, EIP-7883).** Caps the size of MODEXP inputs and raises the precompile's gas cost, closing a gap where large modular-exponentiation calls were underpriced relative to their real cost.

## Network and validator improvements

* **New `eth_config` RPC method.** Lets node operators and tooling query which hard forks are currently active and which are scheduled next, directly from the node.
* **Faster consensus processing.** Improvements to consensus cache management speed up how nodes analyze consensus messages.
* **Faster synchronization.** Optimized handling of the consensus events ordering buffer keeps nodes tracking the chain head more reliably under certain traffic patterns.
* **Optimized log filtering.** Significant performance improvements to `eth_getLogs` queries.