Community Update 131


  • Release
    • We have the final release of running on main net observer nodes and exchange nodes. We are in the process of updating the validator nodes also to 
    • Test net is currently running release final version.  Relase notes for the final release will be out soon.
    • PRs included in final (22 PRs total) are listed at  
    • Release is the second  and substantial part of the Last Finalized State milestone. The main content in this release is DAG Store, BlockStore and LMDB improvements, using the Key Value Store implemented in 0.9.25.  Node catch up is now much improved. This release also includes many bug fixes including for the slashing /tuple space mismatch bug reported earlier.  gRPC behaviour is improved with per validator grpc channel   
    • We will be releasing another small bug fix release that also tests and cleans up end of epoch bonding and unbonding.
    • Release 0.9.26 will complete Last Finalized State.  Open PRs list at
    • Sequence of updates is testnet to mainnet observers and then main net validators if applicable. Current philosophy is to minimize updates/disruptions to validator nodes while enabling improved observer node functionality.  
    • Main difference between testing on Observer nodes vs. Validator nodes: When we test on the observer node, a large part of the code base is executed. The Block creation code runs only on the validator nodes. As a part of that, the portion of the Runtime Manager that plays the deploy is run on the validator node but not on the observer node.
  • Sprint 60 in progress
    • Main Focus: Work towards completing Last Finalized State, identify and address as many slashing issues/bugs as possible, hardening the main net, improve performance, prepare for epoch change at the 250k block height, take in new bonding.  Current PR list at
    • Current Work In Progress
      • Release
        • Security bugs
        • Check bonding and unbonding process, add more tests
        • Reviewing updates to dependencies. 
      • Release 0.9.26
      • Release 0.9.27
      • Ongoing - Improvements to last finalized state expected to be completed in the 0.9.26 release. Significant progress, some of which have been released in 0.9.25 and . The PR and the branch are structured so that multiple people can collaborate/ work on different parts of the feature at the same time. The scope of this work enables (a) faster catchup by new nodes - you can start from the last finalized state - this is a differentiator for RChain (b) offloading older data, differentiated storage and retrieval strategies for the same (c) allows for a leaner / less bloated node. This change touches most parts of the code base. Having to pick between refactoring and work-arounds in various parts. Tomislav implemented a mostly modular and future-beneficial approach.
      • SRE - Procedure for faster garbage collection in JVM implemented, to reduce OOM errors
      • CI/CD:
        • Expanding the number of validator nodes, new nodes set up on IBM in multiple regions.
        • Ongoing - We are slowly moving from Jira to Github for the development team, started publishing release notes in Github with release 0.9.25.  New issues are entered only in github. For a while, we will maintain in both Jira and Github. 
      • TechGovernance:
        • Thursday 10 AM Eastern. In the last session, we (a) reviewed the remaining issues in the rchip repository, updated priorities and status on some (b) Identified issues for discussion with Greg (c)  Meeting notes are at
        • ToDo - There were questions from the community regarding enabling privacy and zero knowledge proofs on the chain - this is in active discussion. Greg will create a position statement on this and likely discuss the current state of the art, use cases and potential approaches in an RCast session.  Same with sharding and cross-chain operation. 
      • Excel Model for 'economics of sustainable network security and decentralization' to enable community understanding of the inter-relationships and community conversation around these issues.  Will be releasing the initial version soon. May have multiple releases.
      • dApp Development:
        • Dan Connolly continues to make progress on the RChat effort using zulip.  
      • Current Backlog (partial)
        • Improve merging in system deploys
        • Improve Casper by enabling more tests and resolving identified code issues
        • Improve BlockMerge including refactoring RunTimeManager
        • Improve multi-parent Casper enablement
        • Implement sharding capabilities
        • Improve logging to be able to learn what API calls are being used, so they can be related to resource use and performance etc
        • Rholang 1.1 to improve syntax and user experience / learning curve
      • Tuesday TeachOuts by Tomislav (Tuesday 10 AM Eastern, 7 Am pacific) in Jimscarver's zoom room 

Tech-Governance meetings on Thursdays 10 AM Eastern, 7 Am Pacific 

Mercury requirements and acceptance criteria

Details on the acceptance criteria: Mercury acceptance criteria

Please see the documentation at

Testnet status

Please see RChain public testnet information to learn more about public testnet as well as a FAQ.

Tech Governance + Community testing

Thursdays at 14:00 UTC. Please see RChain community RNode testing for more information.

Blockers to Mainnet


Risks to code completion for Mercury

Developer website