OrdoFi Revolutionizes Robinhood Chain Execution Layer

OrdoFi is an execution layer for Robinhood Chain, a rollup on the Arbitrum Nitro network. Unlike traditional blockchains, Robinhood Chain has a single sequencer and no public mempool, which changes how MEV (Max Extractable Value) works. Instead of front-running pending transactions, bots compete in a latency race to backrun by trading immediately after a transaction affects a pool.

OrdoFi sits between the user and the sequencer, protecting the submission, auctioning the backrun, and making it checkable. It simulates raw transactions from their recovered sender before forwarding them, refusing transactions that would revert and never paying gas. If a transaction touches a pool, OrdoFi holds a sealed-bid, second-price auction with signed and anchored outcomes to determine who can trade right after.

The user's transaction is dispatched first, followed by the winner's, and the clearing price is charged on-chain with 90% returning as rebates. Bids are acknowledged under EIP-712 signatures from the auctioneer, and receipts are Merkle-anchored to OrdoReceiptLog. An independent watcher measures backrun extraction across every venue and publishes it.