Monad development team proposes a new transaction ordering mechanism, granting applications the power to order while retaining composability.

Foresight News reported that Monad development team Category Labs has published a post proposing a protocol-level transaction ordering rule called “unanimity override.” This mechanism allows applications on a shared chain to directly express transaction ordering preferences without needing to build an independent app chain or Rollup, thus addressing the dilemma between order control and composability. The core logic is: when all applications with a common interest in a pair of transactions reach consensus on the ordering, the protocol honors that consensus; if no consensus is reached, the ordering is supplemented according to priority fees.

The paper demonstrates that this mechanism can still protect the ordering safety of two categories of transactions—even when facing adversaries controlling the default block ordering, deploying malicious applications, or injecting arbitrary transactions: those interacting only with a single application, and “protected transactions” (such as oracle updates or limit order cancellations) that cannot be overtaken in ordering by attacker-constructed transactions. Category Labs stated that this mechanism can be directly applied to scenarios such as PropAMM, on-chain order books, and on-chain auctions, and can extend Rollup-level ordering guarantees to the main chain without cross-chain operations.