Advancing Sui: The Evolution of Sui’s Payment Pipeline

**Executive summary:** The report analyzes three May 2026 Sui mainnet halts caused first by Address Balance reservations entering existing gas-smashing and settlement paths (producing accumulator Split events that caused system-settlement underflows and deterministic aborts) and later by a randomness/DKG state persistence bug during epoch transition; it explains the design of Address Balance and gasless stablecoin transfers, the compatibility risks with coin-object flows, the hotfixes applied, and actionable takeaways for wallets, indexers, payment services, and security teams.