PREPARING FOR THE MAJOR UPGRADE ON MAINNET DECEMBER 10TH

1. #1Wayne Collier19-11-2025source ↗

   Reminder that MainNet will go through a protocol-changing major upgrade on Wednesday, December 10th, starting at 9 am US Eastern (1400 UTC). Here are the most important things you need to know, and some recommendations on how to prepare. 

    

   • MainNet will pause and go offline at the start of the major upgrade

   • MainNet will remain down between 3 and 6 hours

   • This major upgrade with downtime was approved by a vote of the Super Validators to adopt CIP-0089

   
   
   

   • Validators will stop processing transactions as soon as MainNet begins this pause. 

   • To rejoin the network and resume processing transactions, Validators must complete the migration steps outlined in the technical documentation for Major Upgrades, here: 

   • https://docs.sync.global/validator_operator/validator_major_upgrades.html

   • MainNet’s Migration ID will change as part of this upgrade. The Super Validators will announce the new Migration ID once MainNet comes back online. The default Migration_ID value will be 4, unless announced otherwise by the Super Validators. 

   • Every node should take a full backup of its node and identities before the upgrade. Details here:

   • https://docs.sync.global/validator_operator/validator_backups.html#backups

   
   
   

   • Important Points:

   • Before initiating the upgrade procedure, Validators should confirm that their nodes do not have any Ledger API users without party-level permissions

   • See the example provided here: 

   • https://github.com/global-synchronizer-foundation/docs/discussions/19#discussioncomment-15013845

   • Exchanges and other Application Providers should read closely through the additional guidance provided here: 

   • https://docs.digitalasset.com/integrate/devnet/exchange-integration/node-operations.html#rolling-out-major-splice-upgrades 

    

   • The Super Validators strongly recommend that all node operators practice this major upgrade on TestNet: Wednesday, 26 November, starting at 9 am US Eastern. The following should consider the 26 November practice to be mandatory: 

   • Node as a Service providers

   • Wallet Providers

   • Application Providers

   • Exchanges