What this PR does, and why it's needed
Create it if there isn't one already.
Optional. Add any notes on caveats, approaches you tried that didn't work, or anything else.
- is at most 200 lines of code (excluding tests),
- meets RChain development coding standards,
- includes tests for all added features,
- has a reviewer assigned,
- has all commits signed.
Bors cheat-sheet:
bors r+runs integration tests and merges the PR (if it's approved),bors tryruns integration tests for the PR,bors delegate+enables non-maintainer PR authors to run the above.