5 posts tagged with "mev-boost"

EIP-8375 proposes two one-third burns. It burns one third of transaction priority fees in every payload, and it sets an external builder's auction target to one third of the signed gross bid. That sounds additive. It is not.

In a fixed signed-number backcast across 89,994 canonical MEV-Boost blocks, the two standalone amounts were 408.394 ETH and 326.692 ETH. Adding them gives 735.086 ETH, but the draft's actual credit rule burns 469.829 ETH. The missing 265.257 ETH is overlap, equal to 36.1% of the naive sum.

The slashing proof for the April 2023 mev-boost relay exploit did not land in the next block, or even the next hour. It was included 4,474 slots later: 14 hours, 54 minutes, and 48 seconds. Every other canonical proposer-slashing proof on Ethereum landed one or two slots after the conflicting header.

I had been reading the gas-limit signalling table too literally.

It shows a stubborn 30M/36M tail, even though Ethereum's block headers have been sitting around 60M gas for months. I used to describe that tail as validators still signalling old limits. That was too generous. A chunk of it looks like relay-registration fossils.

Block builder win rate is the number everyone tracks. Builder X won 18% of blocks last week. Builder Y's market share is up. But win rate hides something: most of those blocks are worth almost nothing. The real competition isn't for volume. It's for the blocks worth 0.05, 0.2, even 1 ETH in builder payments — the slots that account for a disproportionate share of all MEV value.

Looking at seven days of mainnet MEV-Boost data (~45,000 deduplicated slots), two completely different builder ecosystems are visible.

Correction, 2026-08-13: I grouped a per-observer timing table into 200ms buckets, ran count(), and called the result slots. The old histogram therefore counted 7,438,781 observer rows, roughly 148 rows per corrected block, even though only 50,400 slots physically fit in the seven-day window. Rebuilding from exact canonical block roots at one-block-per-slot grain gives 32,694 / 11,502 / 6,006 blocks in Waves 1/2/3. The three waves and the Wave 2 versus Wave 3 accuracy cliff survive; the old y-axis, ~73,000-slot claim, 10,945 Wave 2 count, and 28× penalty ratio do not. Full correction and queries.

When a validator is chosen to propose a block, it has a choice: publish the moment the block is ready, or wait for MEV-Boost bids to arrive and raise the payout. Most discussions frame this as a binary — you either participate in the timing game or you don't.

The data says it's more complicated. There are three distinct groups, and the middle one has mostly gone unnoticed.