When the spread is too big
to capture alone.

AASC is short for Atomic Arbitrage Smart Contract. It's a smart contract that takes a multi-leg arbitrage opportunity (e.g. buy on venue A, sell on venue B, hedge on venue C) and executes the whole sequence in a single Ethereum block — atomic in the database sense: either every leg lands, or nothing does.

ON1's surveillance stack detects these spreads continuously. When the spread exceeds our internal capacity envelope (size, gas budget, inventory risk), the opportunity is converted into an AASC bid request and dropped onto a private Flashbots MEV-Share relay where whitelisted counterparties bid for the right to execute.

The largest spreads are bigger than any single market participant can route alone — they require simultaneous order placement on multiple venues, atomic settlement, and the ability to absorb slippage on the largest leg. That capacity isn't free.

For counterparties with the inventory, the venue access, and the on-chain execution stack to land an atomic bundle, AASC provides a clean, low-toxicity orderflow channel: each request is sized, priced, and labelled with the legs already identified and the expected gas envelope.