Micro‑Lab: Proposer Strategy with Builders, Relays, and MEV

You are the proposer for each slot. Builders send sealed bids via relays. Now you can also build a block locally by selecting and ordering transactions from the mempool, then compare your local block to the builders’ bids.

Mempool

baseFee 20 gwei slot 1
txgasLimitmaxFeepriorityvaluetagincl?add

Searcher Bundles

Builder Bids (via Relays)

No bid selected.

Local Builder (select and order txs)

gas limit 15,000,000 gas used 0 value 0.000 ETH bundles 0
Build a block under the gas limit. Then select “Local Build” in Bids to compare.
#txgastagincl?updownremove

Policy & Scenario

40 penalty scales with builder censorship score
12 late reveal can miss the slot

Metrics Dashboard

Slots played
0
Cumulative revenue (ETH)
0.000
Missed slots
0
Inclusion compliance
0%
Censorship penalty (ETH)
0.000
Average latency (ms)
0
Relay diversity (last 5)
0/5
Radar chart of your trade‑offs.
Hotkeys: N = Next slot, R = Reveal. All values are simulated for teaching purposes.