feat(keysplit): Split multiple validator keys into one file

[dknopik]

Proposed Changes

Support splitting multiple keys into a single json file, to allow the user registering multiple validators in one go.

Additional Info

This is part of finally mainlining some features I implemented for a demo a while ago.

[Copilot]

Pull Request Overview

This PR adds support for splitting multiple validator keys into a single JSON file, enabling users to register multiple validators in one operation. The changes refactor the keysplit functionality to handle multiple keys instead of just one.

• Support for multiple keystore file paths instead of a single path
• Refactored splitting functions to process multiple keys and return a Split struct containing key shares and nonce
• Updated output format to handle multiple validator keys in a single file

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
anchor/keysplit/src/split.rs	Modified split functions to handle multiple keys and return Split struct
anchor/keysplit/src/output.rs	Updated output generation to handle multiple encrypted key splits
anchor/keysplit/src/lib.rs	Modified main logic to process multiple keystore files with parallel processing
anchor/keysplit/src/crypto.rs	Updated encryption function to work with Split struct
anchor/keysplit/src/cli.rs	Changed CLI to accept multiple keystore paths
anchor/keysplit/Cargo.toml	Added rayon dependency for parallel processing
anchor/database/src/keysplit_operations.rs	Updated function signature to accept slice instead of owned vector

[diegomrsantos]

Personally, it's not clear to me what the difference between Vec<KeyShare> and Split<KeyShare> is.

[dknopik]

added a comment

[Zacholme7]

something I thought of is that we should probably adjust our cli names here to match their docs https://docs.ssv.network/stakers/tools/ssv-keys-cli/

[dknopik]

Some of our flags function differently, e.g. keystore_paths takes multiple paths instead of a folder if the user wants to split multiple and output_path points to the folder to place the input into (instead of being the path for the file to be written). We could change that of course, but personally I prefer our current behavior. wdyt?

My point is that matching the names (IMO) only has value if we also match the behavior.

[dknopik]

Thanks both, will address

[mergify]

This pull request has merge conflicts. Could you please resolve them @dknopik? 🙏

[mergify]

Hi @dknopik, this pull request has been closed automatically due to 30 days of inactivity. If you’d like to continue working on it, feel free to reopen at any time.

[jking-aus]

This is good - I used it for the hoodi vals. Good qol improvement.