EPIC: Cosmos Hub Upgrade to Gaia v12.0.0

[mpoke]

Cosmos Hub Upgrade to Gaia v12.0.0

After Cutting Release Candidate

Preview Give feedback

1. Coordinate with Hypha to test release candidate
2. Create proposal text draft
3. Post proposal text draft on forum
4. Upgrade release and replicated security testnets (note: on Wednesdays)
5. Review post-upgrade status of affected features if necessary

Before Proposal Submission (TODO sync on a call)

Preview Give feedback

1. Cut final release
2. Predict block height for target date
3. Update/proofread proposal text
4. Transfer deposit amount (i.e., 250 ATOMs) to submitter wallet
5. Create upgrade docs (with disclaimer upgrade prop still being voted on)
6. Coordinate with marketing/comms to prep communication channels/posts

Voting Period

Preview Give feedback

1. Estimate threshold of validators that are aware of proposal and have voted or confirmed their vote
2. Coordinate with marketing/comms to update on voting progress (and any change in upgrade time)

Proposal Passed

Preview Give feedback

1. Determine "on-call" team: available on Discord in #cosmos-hub-validators-verified during upgrade
2. Coordinate with marketing/comms on who will be available, increase regular upgrade time updates and validator outreach
3. Prep Gaia docs: docs/getting-started/quickstart.md, docs/hub-tutorials/join-mainnet.md, docs/migration/ docs: Updated docs for v12 release #2718
4. Prep chain-registry update: cosmoshub/chain.json Upgrade Cosmoshub to v12 chain-registry#2733
5. Prep cosmos mainnet repo update docs: Gaia v12 release mainnet#173
6. Prep internal statesync node for upgrade (confirm cosmovisor configured)
7. Reach out to main dependency teams -- Comet, IBC, SDK -- for assistance during the upgrade (#gaia-release-warroom on Slack)

During Upgrade (note: on Wednesdays at 15:00 UTC)

Preview Give feedback

1. Available on Discord in #cosmos-hub-validators-verified
2. Available on Twitter / Slack / Telegram

Post Upgrade

Preview Give feedback

1. Merge PRs for Gaia docs & chain-registry update
2. FAQ: collect issues on upgrade from discord
3. Hold validator feedback session