📣 Summary

v12.0.0 is the new stable mainnet release of the mezod chain client software.

This is a maintenance release rolling out various improvements and fixes.

⚠️ This release incurs a mandatory upgrade of all Mezo Mainnet nodes that must occur on block 10885900 (ETA Tuesday, August 4th, around 14:00 UTC). Upgrading the node before the mentioned block will cause a failure.

📝 Changelog

Improve test coverage for geth upgrade by @tomaszslabon in #698
Bump testnet validators and mainnet RPC to v11.0.0 by @lukasz-zimnoch in #700
Monitor liquidation-bot balance on Mezo in production by @r-czajkowski in #703
Bump iavl to v1.2.8 for upstream bugfixes by @lukasz-zimnoch in #702
Enable go-ethereum metrics collection when --metrics is set by @lukasz-zimnoch in #704
Monitor earn-bot wallet balance on Mezo and Ethereum by @lukasz-zimnoch in #705
Monitor earn-bot bridge fee runs by @lukasz-zimnoch in #706
Fix Grafana crash loop: pin image tag and raise memory limit by @lukasz-zimnoch in #707
Bump testnet validators and mainnet RPC to v11.0.1 by @lukasz-zimnoch in #709
Bump mezod chart to 12.1.0 for shutdown grace period by @lukasz-zimnoch in #710
Adding config setup for Safety Buffer by @dimpar in #654
Add incident report for July 2026 LevelDB corruption by @lukasz-zimnoch in #711
Add NEW Pyth price pusher Kubernetes manifests by @dimpar in #713
Remove equities price feeds from Pyth pusher by @dimpar in #714
Bound and validate eth_getProof storage keys by @lukasz-zimnoch in #715
Bump cosmos-sdk from v0.50.10 to v0.50.15 by @lukasz-zimnoch in #716
Raise JSON-RPC logs filter address cap on testnet nodes by @lukasz-zimnoch in #717
Align StateDB account existence with go-ethereum by @lukasz-zimnoch in #719
Make EVM trace query tracers and timeout configurable by @tomaszslabon in #718
Add v12.0.0 planned upgrade with chain halt by @lukasz-zimnoch in #720

Full Changelog: v11.0.1...v12.0.0

⚙️ Node setup

For guidance around node setup, please refer to the Validator Kit repository.

🔐 Signatures

We're providing two pieces of information for node providers and other interested parties:

The Docker image sha256sum
The Linux binary archive sha256 sum

Both hashes are signed by the development team and verifiable on Keybase. Our Keybase usernames are all associated our GitHub usernames.

Docker image

Image: mezo/mezod:v12.0.0.
sha256 sum: sha256:4a193d7ede7aa525c28d2e43ccbbfa4c6fc754e7e8781ed01f6a5f2840655a8b

Signatures from the development team (verify these in the Keybase app):

@lukasz-zimnoch
BEGIN KEYBASE SALTPACK SIGNED MESSAGE. kXR7VktZdyH7rvq v5weRa0zk90sDpX wIX07Cfy2Yz31Xq 8mliRvTpoVIDeBV VZiP1JZd9Zzoiqn RUAHDbukSaBKp3B AIKe9ocnxXQ2fZb DIpm805q45lS7RD qP6Ddr0cQQ6o9Q8 cSAvWq09EApLo6R GOYdJ6tlAQdcpZX YDoHrrwOJqmxRqy WCu8HzNYCn1XJuS 2HY9VioarwUfMqK 3X36ACeuKry4uD3 RIbMUvyp9WSIGIt 4L2j32Jmu68nls2 I5s63UL33HbY6Ww qY1QKTLHKj4. END KEYBASE SALTPACK SIGNED MESSAGE.
@tomaszslabon
BEGIN KEYBASE SALTPACK SIGNED MESSAGE. kXR7VktZdyH7rvq v5weRa0zk7xdHzK Gm9BtmKb2FhcVia 1x14PuUuG7fVaLE jQhGdMxCf7m4Fx1 wmssLe2XMriQTaz EnLE80dTjNexu3P iYL7fGoOeO7iXnI x8koGnusvrLEUXC ILuRYjlwSJN12au GUzstjIeX5rnoa3 270DMjMAJVmvZD5 XlzpcKxFG4KF0WK EZ6oZhJF63wdsBA zqNXeCeuKry4uD3 RIbMUvyp9WSIGIt 4L2j32Jmu68nls2 I5s63UL33HbY6Ww qY1QKTLHKj4. END KEYBASE SALTPACK SIGNED MESSAGE.

Linux binary

Archive: linux-amd64.tar.gz (see Assets section)
sha256 sum: 8e145b1df5b411f6a10de53daed038b91f43835fe0d0e397e30fa508ed890957 linux-amd64.tar.gz