Governance Proposal for Cronos POS Chain v6 Mainnet Upgrade is Now Live for Voting
We are pleased to announce that the governance proposal for the Cronos POS Chain v6.0.0 mainnet upgrade is now live. This proposal introduces important improvements to the network’s performance, security, and interoperability by incorporating the latest developments from the Cosmos SDK. We encourage all validators, node operators, and community members to review the details and participate in the voting process.
What is this proposal?
This proposal aims to upgrade the Cronos POS Chain mainnet (chain ID: crypto-org-chain-mainnet-1) to v6.0.0-2. This release brings the chain in line with the latest Cosmos ecosystem standards and includes key dependency upgrades, the new Circuit Breaker module, and database optimizations to boost efficiency for both developers and users.
Core library upgrades
The upgrade includes the following dependency bumps bringing Cronos up-to-date with the latest standards. Cosmos SDK v0.50.10 builds on the foundational improvements from the “Twilight” release which introduced better event handling, settings management, and support for a more flexible consensus engine to boost performance. v0.50.10 extends these capabilities with improved modularity, runtime stability, and tooling fixes that make maintenance and upgrades easier.
Together with the IBC-go v8.5.1, it improves cross-chain communication and compatibility with the wider IBC ecosystem.
And CometBFT v0.38.13 provides stability improvements to the consensus layer.
Circuit Breaker Module
The v6.0.0 upgrade introduces the x/circuit module, which provides network operators with an emergency mechanism to freeze specific message types. It can be used to respond to potential vulnerabilities without requiring a full chain halt, by allowing an authorized account (such as a validator or governance account) to trip the circuit breaker to temporarily block messages from being executed or included in the mempool.
RocksDB caching layer
A caching mechanism has been added to RocksDB to optimize memory usage during block execution. It significantly reduces RAM consumption by limiting in-memory state storage during block execution. As a result, full nodes now use less RAM especially during periods of high activity, making it easier and more cost-effective for validators and node operators to run the network.
MemIAVL and RocksDB Enhancements
MemIAVL has been bumped to its latest version with improved state sync performance and consistency. RocksDB is now upgraded to v9.2.1, with VersionDB adjusted for compatibility and optimal read/write performance. These enhancements reduce memory pressure and improve database handling for validators and full nodes during chain operations.
Other Updates and Fixes
Beyond the major updates detailed above, this release includes several important compatibility improvements, such as Solo Machine upgraded to v0.1.4, MsgModuleQuerySafe added to allowed message types in ICA host settings, enhanced validation for expedited governance proposals and more.
These updates collectively enhance the reliability and performance of the Cronos POS Chain and reduce infrastructure requirements for validators and node operators.
For more details, users can refer to the full binary release notes.
Governance voting process
The community governance voting process for this upgrade will start once this proposal has been funded by a sufficient deposit. The upgrade will be performed at the block height of 24836000 if the proposal passes. The Chain will be paused to allow validators to upgrade.
How can I prepare?
Validators and full node hosts need to upgrade to the latest chain-maind binary. There is no other required action.
The 14-day voting period begins at 12:50pm HKT / 4:50 am UTC on July 11, and ends at the same time on July 25.
We highly encourage all Cronos POS Chain validators and delegators to cast their votes.
How do I vote?
We have started the on-chain parameter change governance proposal 31 and would like to invite you to participate in the voting process. You can cast your vote by using “chain-maind” or Crypto.com DeFi Desktop Wallet (latest version 1.5.1).
Option 1: Crypto.com DeFi Desktop Wallet
Download the latest version of the Crypto.com DeFi Wallet v1.5.1
Select Governance section
Choose proposal #31
Cast your vote
Option 2: CLI (chain-maind)
To check the proposal:
chain-maind q gov proposal 31 --node https://mainnet.crypto.org:26657/Check the vote by:
chain-maind tx gov vote 31 [voting_option] --from [key_name] --chain-id="crypto-org-chain-mainnet-1" --node https://mainnet.crypto.org:26657/You may track voting results at the Cronos POS Chain Explorer.
How do I upgrade my nodes?
Node runners do not need to perform any operations yet, as the upgrade proposal must be passed first. Important dates for your attention:
Jul 25 2025, 12:50pm HKT / 4:50 am UTC: When the upgrade voting period ends, you can check the result at https://cronos-pos.org/explorer/proposals.
At block height 24836000: Please upgrade your node at this block height if the upgrade proposal passes. You can find the approx time and upgrade count down at https://www.mintscan.io/crypto-org/block/24836000.
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