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Welcome to BuilderNet

BuilderNet is a block building network for Ethereum.

It's a secure, performant, and globally distributed network for collaborative Ethereum block building. Transactions are optimised by a competitive market of searchers without compromising on transaction privacy, and MEV value is permissionlessly redistributed to users.

By maximizing participation in block building, BuilderNet reinforces the continued decentralization and resilience of public blockchains like Ethereum. Read the full mission statement here.

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BuilderNet is currently transitioning to a new security model. During this period BuilderNet nodes are not running in TEEs, but backrunning and routing services continue to run in TEEs. Updates are posted to the forum.

Key Features​

  1. Multiple block builder instances, based on the open source rbuilder.
  2. Instances share orderflow and coordinate their bids with each other.
  3. TEEs let searchers compete to execute trades efficiently without compromising user privacy.
  4. Users are refunded the value their orderflow contributes to the final value of the blocks.
  5. Anyone can audit and contribute to rbuilder.

Resources​

  • For more information about the mission of BuilderNet, read the mission statement
  • For where BuilderNet is headed, see the roadmap

During a test period, BuilderNet landed the first mainnet block on November 12, 2024 at slot 10,383,036, block number 21,172,097, with block hash 0xb1e93268b92b9526e1ca0288e00e799362c8be6dcac72b7da1330f0f2b7ca670 and extra_data Illuminate Dmocrtz Dstrib Prtct.

BuilderNet launched publicly on November 26, 2024, with extra_data set to BuilderNet (<operator>). The first mainnet block after launch was at slot 10,483,748, block number 21,272,327, with block hash 0x86a32583045f379cfd483b8a5ddeaf927c73cc8c510785113c05caf35f0190e8.