13 posts tagged with "mev"

Transaction receipts are one of those parts of Ethereum that node operators silently carry but rarely talk about. Every full node stores every receipt for every transaction ever executed: gas used, status, and — crucially — every event log the transaction emitted. That accumulates fast.

As of March 2026, Ethereum's full receipt history weighs in at 55.5 GB across roughly 430 days of post-Merge data tracked in EthPandaOps' xatu dataset. Growing at about 1.65 GB per day, it's manageable. But in early December, something broke that trend spectacularly.

Every Ethereum block has the same skeleton: a list of transactions, ordered from position 0 to whatever the builder packed in. Naively, you'd assume position 0 belongs to the highest-paying user — priority fee sorts everything. But that's not what the data shows.

Half of all position-0 transactions pay zero priority fee. And paradoxically, they are the safest transactions in the entire block — reverting at 0.027%. The tail of the block (positions 200-400) reverts 60× more often.

Every MEV dashboard focuses on the same number: the execution layer bid that the winning builder pays the proposer. It's tracked obsessively. Tournaments are run around it. Entire firms exist to maximise it. And for 93% of blocks proposed on mainnet right now, it's the smaller of the two income streams the proposer receives.

The other stream — the consensus layer's attestation inclusion reward — sits quietly in the background, never shown on dashboards, never cited in "MEV revenue" charts. It's roughly four and a half times larger than the median MEV-boost payment.

Ethereum's validator exit queue is public, deterministic, and slow. When a large entity starts withdrawing, you know — to the epoch — when their stake will land on-chain. That predictability is mostly a feature. But it has an edge: anyone who knows exactly when tens of thousands of ETH will hit the market can position ahead of it.

Two protocol changes hit Ethereum eight days apart in late 2025. The gas limit jumped from 45M to 60M on November 25. Then Fulu — Ethereum's PeerDAS upgrade — activated on December 3. Neither was unexpected. What nobody documented is what happened to MEV builder competition in the weeks that followed.

Builder bid density fell 66%. Proposers earned 30–40% less from MEV-boost during December. The market took seven weeks to recover, and when it did, the recovery was abrupt — not gradual. It happened in a single day.

There's a counterintuitive pattern buried in Ethereum's block-building data: the most valuable blocks — the ones where MEV extractors collect the most ETH — consistently contain fewer transactions than ordinary blocks.

Not slightly fewer. Significantly fewer.

A block worth 0.2–1 ETH in MEV carries, on average, 185 transactions. A normal low-MEV block carries 293. That's 108 fewer transactions — a 37% drop from peak — in a block that everyone in the market fought hardest to produce.

Most validators proposing a block right now will earn about 0.011 ETH. That's the median. But the mean is 0.050 ETH — more than 4× higher. The reason the mean is so detached from the median tells you everything about how staking rewards actually work.

Over the 30 days ending February 26, 2026, there were 200,963 MEV-Boost blocks on mainnet. I deduped them by taking the highest bid per slot across all relays. Here's what I found.

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.

The MEV relay system starts building blocks for a slot before that slot exists. Builders are running their engines eight seconds ahead of the clock, constantly revising bids as new transactions hit the mempool. What nobody seems to have charted is what happens at exactly two seconds before a slot starts: the entire auction collapses to near-zero and then rebuilds from scratch.

Every proposer using MEV-Boost faces the same tradeoff: wait longer to capture more value, but at some point your block arrives too late for attesters to see it before they commit their vote. The timing game is well-understood in theory. What hasn't been measured is exactly where the cliff is — and how steep the drop really is.

The cliff is at 3.0 seconds. What happens after it is sharper than you'd expect.