The Validator History Program, a component of Jito StakeNet, is an on-chain record of verified Solana validator data, storing up to 512 epochs of history per validator. It takes fields accessible to the solana runtime like validator performance history, validator commission, MEV commission, as well as Gossip data like validator IP, version, and client type, and stores them all in a single account. It also contains some fields that currently require permissioned upload but are easily verifiable with a getVoteAccounts call, like total active stake per validator, stake rank, and superminority status. All these fields are stored in a single account per validator, the ValidatorHistory account. This enables all these disparate fields to be easily composed with in on chain programs, with a long lookback period and ease of access through the single account.

The main Anchor program is in programs/validator-history.

• src/lib.rs - entrypoint for instructions
• src/state.rs - containing the account definitions as well as logic for appending all the fields to the main circular buffer
• src/instructions/*.rs - individual instructions

ValidatorHistory: Tracks historical metadata on chain for a single validator. Contains a CircBuf, a data structure that acts as a wrap-around array. The CircBuf contains entries of ValidatorHistoryEntry, which stores validator metadata for an epoch. The default/null value for each field is the max value for the field's type.

Note that this is a zero_copy account, which allows us to initialize a lot of space without hitting runtime stack or heap size liimits. This has the constraint of requiring the struct to implement bytemuck::{Pod, Zeroable} and following C-style struct alignment.

Config: Tracks admin authorities as well as global program metadata.

Tests are in tests/ written with solana-program-test.

One should run their tests in the SBF interpreter. That can be done with the following:

$ anchor build && SBF_OUT_DIR=$(pwd)/target/deploy cargo test

anchor build --program-name validator_history (regular anchor build) solana-verify build --library-name validator_history (solana verified build)

Verify with solana-verifiable-build:

solana-verify verify-from-repo -um --program-id HistoryJTGbKQD2mRgLZ3XhqHnN811Qpez8X9kCcGHoa https://github.com/jito-foundation/stakenet

Run as binary:

Build: cargo b -r --package validator-keeper

Run: ./target/release/validator-keeper --json-rpc-url <YOUR RPC> --cluster mainnet --tip-distribution-program-id F2Zu7QZiTYUhPd7u9ukRVwxh7B71oA3NMJcHuCHc29P2 --program-id HistoryJTGbKQD2mRgLZ3XhqHnN811Qpez8X9kCcGHoa --interval 600 --keypair <YOUR KEYPAIR> --gossip-entrypoint <GOSSIP ENDPOINT>

Run as docker container:

docker compose --env-file config/.env up -d --build validator-keeper

Metrics for running can be sent to your influx server if you set the SOLANA_METRICS_CONFIG env var.

The CLI can be used to see the status of on-chain validator history data.

Build: cargo b -r --package validator-history-cli

To see the current epoch state of all validator history accounts:

./target/release/validator-history-cli --json-rpc-url <YOUR RPC URL> cranker-status

To see the historical state of a single validator history account:

./target/release/validator-history-cli --json-rpc-url <YOUR RPC URL> history <VOTE ACCOUNT>