CANTON 3.4 TO CANTON 3.5 TRANSITION Update: 2026-06-08 See details in the long-term SV Operations schedule
Phase 1: Complete
Phase 2: • Daml Models from Splice 0.6.2 take effect on MainNet. Requires Splice 0.6.2 at minimum: ◦ MainNet: UPGRADE BEFORE 2026-06-09 Phase 3: Upgrade Global Synchronizer networks to Canton Protocol 35 • All three Global Synchronizer networks will perform a Logical Synchronizer upgrade to Canton protocol Version 35. • Minimum Splice Version for for Validators for this Upgrade: Splice 0.6.5 • Dates: (All events at 9 am US Eastern / 1300 UTC) ▪︎ LSU from protocol version (PV) 34 to 35 on DevNet: • Topology Freeze: 2026-06-09 • Upgrade: 2026-06-10 ▪︎ LSU for PV 34->35 on TestNet: • Toplogy Freeze: 2026-06-16 • Upgrade: 2026-06-17 ▪︎ LSU for PV 34->35 on MainNet: • Toplogy Freeze: 2026-06-26 • Upgrade: 2026-06-27 App Provider Experience during Logical Synchronizer Upgrades (LSUs): • All party onboarding, package vetting and other topology transactions will pause for 24 hours before the LSU, and will resume immediately after the LSU completes. • Daml transactions will be delayed for seconds to minutes at the moment of the LSU • App providers should experience no other impact. Also Coming in Phase 3: Traffic-based App Rewards are currently expected to go live on MainNet at the end of July. Based on the current plan, this will require upgrading Validator nodes to Splice 0.6.11. • Important dates for Traffic-based App Rewards ◦ July 1: Dry Run of Traffic-based app rewards goes live on MainNet. ◦ TBD July: MainNet switches to traffic-based app rewards (final date will depend on schedules for various production trading dry runs taking place during July).
