IOTA’s Starfish consensus engine goes live, enhancing trade infrastructure

IOTA just shipped one of its most consequential upgrades to date. The Starfish consensus engine is now live on the IOTA mainnet, replacing the previous Mysticeti engine with a fundamentally different approach to how the network reaches agreement on transactions. The upgrade, activated via protocol version 24 in release v1.21.1 around April 23, 2026, isn’t just a routine software patch. It’s a structural overhaul designed to make IOTA the kind of infrastructure that global trade systems can actually depend on, even when network conditions get messy. What Starfish actually changes under the hood Starfish decouples the network’s progress from the synchronization of every single node. The chain keeps moving even if some validators are temporarily lagging, and those validators can catch up independently without dragging everyone else down. The technical architecture relies on a directed acyclic graph-based Byzantine fault-tolerant consensus model. Three specific mechanisms make this work. First, cordial dissemination handles how data gets spread across the network. Second, Reed-Solomon encoding ensures data availability even when some pieces are missing. Third, Data Availability Certifi...