Oracle-settled derivatives — perps, options, parimutuel binaries, and lending liquidations — now clear billions of dollars per week against a handful of on-chain reference prices. The economic properties of these markets depend on two things almost no one measures directly: how fast the price actually arrives, and who can act on it before everyone else can.

This publication collects my working notes on those two questions.

• Publication latency. The interval between off-chain price formation (CEX matching engine) and on-chain availability to consuming contracts. Across Data Streams, Price Feeds, and proprietary DEX oracles.

• Cross-venue basis. How aggregated oracle prices diverge from the CEX order books they're built from, and what that divergence implies for liquidations and settlement finality.

• Microstructure of on-chain binaries. Order-flow, queue priority, and adverse selection on Polymarket-style CLOB markets that settle against Chainlink feeds.

• Preconfirmation economics. Base flashblocks and Arbitrum Stylus preconfirmation as a source of directional information ahead of block finalization.

Empirical, reproducible, and open where possible. Working stack:

• Rust + Python. Alloy + reth archive nodes on Arbitrum, Base, and Polygon.

• Full L2 orderbook logger (~30M records / day across BTC, ETH, SOL 5- and 15-minute markets).

• Base L2 flashblocks observer with per-pool price series.

• Historical Binance, Coinbase, and Deribit tick data for cross-venue reference.

• Cached gamma-api / Polymarket settlement data for outcome labelling.

Results are published as short research notes, with code and data links where licensing permits.

• A public latency dataset for Data Streams publication → settlement consumption across Arbitrum and Base, benchmarked against CEX tick data.

• A falsification-first series: testing claims that get repeated about on-chain microstructure (e.g. "flashblock DEXes lead CEXes on BTC") against real data. Early results: most fail.

• Microstructure decomposition of a single high-performing wallet class on Polymarket 5-minute binaries — what's edge, what's execution, what's noise.

Published settlement-latency analysis is almost entirely produced by the oracle vendors themselves or by protocols that consume their feeds. Independent measurement matters for the same reason independent security research matters: the biases are different, and the failure modes show up in different places.

Open to collaboration with protocols integrating Data Streams, researchers working on oracle security, and anyone publishing on-chain data openly.

Reach me at jay.kichodhan@gmail.com