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MEV Lab

Explore real-world MEV patterns, how MEV-Boost and PBS changed block-building roles, and where extraction pressure still appears today.

What MEV means in plain language

MEV is value captured by changing transaction order, inclusion, or exclusion. In practice, specialized actors scan pending flow and block construction opportunities for arbitrage, liquidation, sandwich, and related patterns.

Educational warning: detection here uses heuristics. It is great for learning patterns but not suitable for legal attribution or production forensics.

Before PBS vs with PBS/MEV-Boost

Both models still process user transactions, but PBS separates specialized block construction from proposer selection.

Before PBS

  • Wallet tx enters mempool.
  • Proposer must build and order block locally.
  • MEV extraction sophistication depends on proposer setup.
  • Potentially uneven access to advanced orderflow strategies.
Risk story: validators either miss value or over-optimize for extraction with uneven tooling.

With PBS / MEV-Boost

  • Wallet tx enters mempool and can be bundled by searchers/builders.
  • Builders compete to produce blocks and submit bids.
  • Relays verify and forward candidate payloads.
  • Proposers pick the best valid bid and publish the block.
Outcome story: role separation increases specialization and exposes clearer builder-payment signals.

Live MEV detector

Scan a block for sandwich, arbitrage, liquidation, and JIT-liquidity patterns. Use latest for a quick sample or enter an explicit block number/tag.

Loading baseline scan...

Estimated pre-PBS vs post-PBS comparison

This panel separates observed live signals from assumption-based historical estimates. It is educational guidance, not a definitive causal measurement.

Observed current MEV-tagged block share
0.0%
Confidence: High (directly from current headers)
Observed avg builder payment (current)
0.0000 ETH
Confidence: High (live header enrichment)
Observed MEV event rate (scan sample)
0.00%
Confidence: Medium (heuristic detector)
Assumption-based estimate: pre-PBS extraction pressure proxy
0.00%

Uses multiplier 1.6x applied to current heuristic event rate.

Assumption-based estimate: pre-PBS value concentration proxy
0.0000 ETH

Uses multiplier 1.35x applied to current average builder payment signal.

Methodology notes: multipliers are configurable educational assumptions. Use this panel to reason about incentives, not to claim precise historical costs. For publication-quality claims, pair with peer-reviewed studies and archived datasets.

How to read these comparisons

  • Observed signals come from current live endpoints (`/api/validators/head`, `/api/mev/sandwich`).
  • Pre-PBS values shown here are explicit educational estimates with visible assumptions.
  • Use this as an incentives explainer, not a precise historical accounting system.