Enable Fee Delegation

[alexanderbez]

TODO:

• Address any remaining issues from original PR
• Proto Updates
• Verfiy docs + spec are in order
• Fix CI (issues with ante-handler/txs)

replaces: #5207

/cc @aaronc @ethanfrey

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[cwgoes]

The concept seems fine, but would an ADR be helpful here, perhaps? Finding a (vague) spec requires going back several PRs to a comment in #4616.

[aaronc]

The concept seems fine, but would an ADR be helpful here, perhaps? Finding a (vague) spec requires going back several PRs to a comment in #4616.

An ADR does make sense. I will try to get to it at some point soon... There's a lot of other stuff on my plate at present. Unless someone else wants to write one....

[alexanderbez]

@clevinson we may have to consider punting this 0.40. Thoughts @aaronc?

[aaronc]

@clevinson we may have to consider punting this 0.40. Thoughts @aaronc?

Unfortunately we may need to do that... Although obviously that would be pretty disappointing for stakeholders who have been waiting already a long time for subkeys functionality.

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[atheeshp]

closed in favour of #8061