Terra Classic is preparing for one of its most significant upgrades yet. Instead of upgrading step by step, OrbitLabs has proposed to move the network directly to Cosmos SDK v0.53, which also brings IBC v2 (Eureka) support.

This streamlined approach is designed to reduce risks, cut down on coordination time, and provide the community with faster access to cross-chain interoperability and technical improvements.

Why This Upgrade Matters

• Fewer Disruptions: A single coordinated upgrade event instead of multiple steps.
• Future-Ready: Aligns Terra Classic with the latest long-term Cosmos SDK release.
• Cross-Chain Power: IBC v2 (Eureka) enables multi-hop routing for stronger connectivity with Cosmos Hub and beyond.
• Security and Performance: Gains enhancements from CometBFT v0.38, Wasmd v0.61, and updated IAVL.

What Will Change

1. Core Upgrade

• Migration to Cosmos SDK v0.53
• Upgrade to CometBFT v0.38
• Wasmd v0.61 / WasmVM v2.2
• IBC-Go v10 with IBC v2 support
• Optional features (x/protocolpool, x/epochs, unordered transactions) remain off until governance enables them.

2. IBC v2 (Eureka)

• Multi-hop token transfers between chains.
• Improved reliability through stronger error handling and retries.

3. Testing

• Deployment on the rebel-2 testnet.
• Validation of connections, ICS-20 transfers, and IBC v2 routing.
• Full app and validator testing with published results.

4. Documentation

• Updated validator runbooks for smooth upgrades.
• Migration steps for dApps clearly outlined.
• Examples of IBC v2 message formats for developers.

Budget

The proposed upgrade has a total budget of $56,000 USD, to be funded in LUNC at the time of spending proposals.

Final Take

This upgrade represents a bold leap forward for Terra Classic. By moving directly to Cosmos SDK v0.53 with IBC v2 (Eureka), the network will gain stronger security, smoother performance, and advanced interoperability across the Cosmos ecosystem. It positions Terra Classic for a more resilient and connected future.