# Open sourcing rbuilder

Source: https://writings.flashbots.net/open-sourcing-rbuilder
Kiwi News: https://news.kiwistand.com/stories/Open-sourcing-rbuilder?index=0x66866a5790eb21d42f55d1e67c0cf0ac691a66de3d3926ccabb4d076f5fbc77b9b2f88d7
Submitted by tim on 2024-07-04 UTC, 1 upvote, 0 comments

## Summary

Flashbots has open sourced rbuilder, its latest and most performant block builder, written in Rust and designed to work with Reth. The company says sharing responsibility and benefits for advancing block building creates a positive-sum game for Ethereum stakeholders, and that the software is designed to be developed and stewarded by the community. The announcement encourages developers to contribute, encourages all teams to build their builders in the open, and states that the community should trust only builders that follow norms of transparency and free software.

## Article

An open and efficient block building ecosystem is essential to Ethereum. In order to catalyze further innovation and collaboration in block building, Flashbots has open sourced rbuilder, our latest and most performant block builder written in Rust, and designed to work with Reth.

We believe that sharing the responsibility and benefits of advancing block building creates a positive sum game for all Ethereum stakeholders. rbuilder is designed to be developed and stewarded by the community, and open sourcing it will accelerate this future.

We encourage developers to contribute to rbuilder, all teams to develop their builders in the open, and the community to only trust builders who follow the norms of transparency and free software.