Prop 14: BCIP-14: Upgrade to v3

Context

The purpose of this proposal is to upgrade BandChain to v3. This upgrade will roll-out these features on BandChain.

• Bump Go to v1.24.2, Cosmos SDK to v0.50.13, CometBFT to v0.38.17, IBC-Go to v8.7.0, go-owasm to v0.3.1
• Add new modules: tss, bandtss, feeds, tunnel, restake, rollingseed, and globalfee.
• Introduce new mempool with transaction lanes and prioritization
• Add Grogu and Cylinder programs to support feed price submission and TSS operations

Upgrade block and date

This upgrade is expected to occur at block 42051400. (Estimated date: July 8, 2025 at 12:00 UTC)

On-Chain Upgrade Process

When the network reaches the halt height, the BandChain state machine will stop. Validators and node operators must replace the binary with the v3 version. We recommend using Cosmovisor to handle the upgrade automatically. The chain will resume from the same height with full history.