## Issue Addressed
N/A
## Proposed Changes
Add a note to the Doppelganger Protection docs about how it is not interoperable until an endpoint facilitating it is standardized (https://github.com/ethereum/beacon-APIs/pull/131).
## Additional Info
N/A
Co-authored-by: realbigsean <seananderson33@gmail.com>
## Issue Addressed
NA
## Proposed Changes
- Adds docs for Doppelganger Protection
- Shortens a log message since it was a bit longer than our usual formatting.
## Additional Info
Please provide any additional information. For example, future considerations
or information useful for reviewers.