Elliot.

`seelabs` confirmed that this still needs perf testing. cc @sophiax851

@mvadari I requested ximinez and thejohnfreeman but the PRs listed here are higher priority: https://github.com/XRPLF/rippled/milestone/8

`Perf Test Desired (Optional)`: This is a new feature in the API, but the perf impact should be negligible. Internal tracker: RPFC-109

I think this can be merged once the (trivial) merge conflicts are resolved

@ximinez or @Bronek or @mvadari - could you have a quick look to see if the "2 lines in your changes are missing coverage" would be easy to address? I'm...

- @mvadari to confirm whether she thinks, given the above, this is still ready to be merged now

> (cc @Bronek to double check since he's already taken a look at some of the code)

From my perspective, @ximinez or @seelabs are welcome to merge this. (no big rush though)

For context, what is motivating this feature addition? Who will use it?

@dangell7 what's the next step for this PR? Would you like to request for it to be code reviewed?