# Features

For a high level discussion of the architecture and benefits of Jito-Solana, checkout our introduction [post](https://medium.com/@Jito-Foundation/jito-solana-is-now-open-source-e1028c53fae1) or this [presentation](https://drive.google.com/file/d/1mLQMGnKUh7RhOSOtLoXIpHhmAjwwO30Q/view?usp=sharing).

## Bundles

* Bundles are a list of transactions that are executed sequentially.
* Bundles are executed all-or-nothing. If one fails, the entire bundle is rolled back.
* Bundles can contain tips, which allows users to tip validators for priority treatment.
* Bundles are not forwarded between validators.

## Relayer

* Validators can connect to a relayer, which performs filtering and signature verification.
* Validators disconnect their TPU when connected so all packets must come through a relayer.
* Validators fallback if the relayer stops heartbeating or becomes unhealthy.

## Block Engine

* Block Engines send high-profit bundles and transactions to validators.

## Low Latency Shred Sending

* Shreds can be sent over UDP to an address of one's choice to bypass turbine latency.

## Open Source

* Jito-Solana is open source. The client is permissionless to run with no contracts or other requirements.
* The only fee is 5% on MEV tips through Jito's Block Engine. This has no impact staking rewards and only impacts incremental revenue from MEV.