Updated readme

README.md

@@ -99,12 +99,16 @@ We also involve academia in the early stages of new ideas, however, the optimize
 
 ## Audits
 
-Grandine is used in production, however no audits are completed. Always secure your keys with the approach you trust ([Web3Signer](https://docs.web3signer.consensys.io), [Vouch](https://github.com/attestantio/vouch), etc.). Use it at your risk. 
+Grandine is used in production, however, a full audit is not completed. The client was tested by [Antithesis](https://antithesis.com/) team and no serious issues were found. The Antithesis team was impressed by Grandine performance because the client never crashed or got stuck during testing. However, always secure your keys with the approach you trust - ([Web3Signer](https://docs.web3signer.consensys.io), [Vouch](https://github.com/attestantio/vouch), etc.). Use it at your risk.
 
 ## Contact
 
 It's best to reach us via [Grandine Discord](https://discord.gg/H9XCdUSyZd) or [Grandine Telegram](https://t.me/+yMHjrJanClozYzQ0). Feel free to join!
 
+## Donate
+
+Funding public goods is hard. We appreciate your donations via Ethereum address [0x93b10cc89A3D3b5bb6bBB04EfFe104873EF002A9](0x93b10cc89A3D3b5bb6bBB04EfFe104873EF002A9).
+
 ## Credits
 
 Grandine focuses on original consensus core implementations, however it uses [a lot of crates](Cargo.lock) developed by the community. For example, Grandine uses `rust-libp2p` based networking libraries developed by the Lighthouse team since the beginning. Lighthouse's `eth2_libp2p` library was generic back then and we still use a fork of it now. We also used `libmdbx-rs` bindings library by Akula maintainer and now we use a fork of it maintained by Reth team. So we focus on the original consensus core because it's the unique value Grandine offers for the community, but we also love to use some great crates developed by other client teams and the community. Grandine would not be where it is now without the efforts of the other client teams and the community! Huge thanks to everyone!