MANTRA Chain v8.3.0 — Coordinated Security Upgrade

🚨‼️ DO NOT BUILD FROM SOURCE ‼️🚨

This is a mandatory security release for all validators and full-node operators. It is
distributed as prebuilt, verified binaries only as part of a coordinated security
response. Source code and full technical details will be published after the coordination
window closes.

This is a coordinated, consensus-breaking upgrade recommended for the entire validator set. It delivers security hardening across the chain's state-processing layer, including the embedded Cosmos components, along with associated dependency and module maintenance.

As part of a coordinated security response, the binaries for this release are distributed in prebuilt, signed form and the source is being withheld until the public disclosure window closes. Operators should upgrade using only the official signed binaries and must not build from source. The fix is complete, verified, and has no known regressions; the objective of this proposal is simply to move the network to the patched version at a single agreed height.

Action Required

1. Do not build from source. Use only the official signed binaries attached below.
2. Upgrade every validator and full node to v8.3.0 ahead of block 16555888.
3. Verify checksums (and signatures) before running — see below.

What's Changed

• Security hardening within the state-processing layer, including the embedded Cosmos EVM
  components.
• Associated dependency and module maintenance.