RFQ Telemetry Leakage Explaining Private Market Maker MEV

1. The Illusion of Zero-MEV Off-Chain Execution

Traders routinely utilize Request-for-Quote (RFQ) aggregators under the assumption that off-chain price negotiation provides absolute immunity from Maximal Extractable Value (MEV) front-running. Because RFQ protocols route quotes through private market makers off-chain, market participants believe their trade intent remains completely invisible until an agreed transaction is submitted to the blockchain.

This confidence appears structurally sound at first glance. By bypassing the public memory pool (mempool), an off-chain RFQ quote signature eliminates the traditional attack surface exploited by generalized searchers and front-running bots. Traders assume that if a market maker declines or cancels a quote, the trade simply returns to an automated market maker (AMM) fallback router without leaving a trace.

However, this perspective overlooks the asymmetrical distribution of real-time telemetry. While the trade is hidden from the public mempool, off-chain quote cancellations generate deterministic latency signals directly visible to private market makers. Off-chain routing masks transactions from public searchers while systematically exposing directionality to institutional liquidity providers.

2. Telemetry Leakage and Fallback Arbitrage Mechanics

To understand how private market makers (PMMs) convert cancelled RF