Flashbots · interactive mechanism simulation

Searchers submit sealed-bid bundles → competing builders assemble blocks and bid → the relay escrows the block and sends a blind header → the proposer blindly signs the highest bid → the relay reveals the full block for publication. Push the OFAC slider (or the button) to see the 2022 censorship crisis.
Searchers submit sealed-bid bundles Builders (competing) 4 builders assembling blocks Relay escrow + blind header OFAC filter: 0% 0.00 ETH captured Proposer blind-signs highest bid Ethereum L1 0 blocks proposed Censored / dropped 0 bundles filtered
Bundles submitted
0
Blocks proposed
0
MEV captured
0.00 ETH
Bundles censored (OFAC)
0
Top builder's block share
0%
Parameters — edit me
3.0/s
4
0.30 ETH
40%
0%
Controls

Illustrative simulation. Defaults mirror the researched Flashbots mechanism — sealed-bid bundle auctions feeding competing block builders, relay escrow with blind header signing (MEV-Boost proposer-builder separation), and the 2022 OFAC-compliance censorship dynamic — but bundle sizes, timing, and the builder-concentration model are simplified and randomized for visualization, not live onchain data. Drag the sliders to explore how the auction responds. Part of The Onchain Experiment Atlas.