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## Description Closes: #9404 --- ### Author Checklist *All items are required. Please add a note to the item if the item is not applicable and please add links to any relevant follow up issues.* I have... - [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] added `!` to the type prefix if API or client breaking change - [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting)) - [x] provided a link to the relevant issue or specification - [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules) - [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing) - [ ] added a changelog entry to `CHANGELOG.md` - [ ] included comments for [documenting Go code](https://blog.golang.org/godoc) - [ ] updated the relevant documentation or specification - [x] reviewed "Files changed" and left comments if necessary - [x] confirmed all CI checks have passed ### Reviewers Checklist *All items are required. Please add a note if the item is not applicable and please add your handle next to the items reviewed if you only reviewed selected items.* I have... - [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] confirmed `!` in the type prefix if API or client breaking change - [ ] confirmed all author checklist items have been addressed - [ ] reviewed state machine logic - [ ] reviewed API design and naming - [ ] reviewed documentation is accurate - [ ] reviewed tests and test coverage - [ ] manually tested (if applicable) |
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| README.md | ||
| developer-guide.md | ||
| quick-guide.md | ||
README.md
Upgrading IBC Chains Overview
This directory contains information on how to upgrade an IBC chain without breaking counterparty clients and connections.
IBC-connnected chains must be able to upgrade without breaking connections to other chains. Otherwise there would be a massive disincentive towards upgrading and disrupting high-value IBC connections, thus preventing chains in the IBC ecosystem from evolving and improving. Many chain upgrades may be irrelevant to IBC, however some upgrades could potentially break counterparty clients if not handled correctly. Thus, any IBC chain that wishes to perform a IBC-client-breaking upgrade must perform an IBC upgrade in order to allow counterparty clients to securely upgrade to the new light client.
- The quick-guide describes how IBC-connected chains can perform client-breaking upgrades and how relayers can securely upgrade counterparty clients using the Cosmos SDK.
- The developer-guide is a guide for developers intending to develop IBC client implementations with upgrade functionality.