130 lines
4.3 KiB
Rust
130 lines
4.3 KiB
Rust
use crate::{Error as ValidatorDirError, ValidatorDir};
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use bls::Keypair;
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use rayon::prelude::*;
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use slog::{info, Logger};
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use std::collections::HashMap;
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use std::fs::read_dir;
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use std::io;
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use std::iter::FromIterator;
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use std::path::{Path, PathBuf};
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#[derive(Debug)]
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pub enum Error {
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DirectoryDoesNotExist(PathBuf),
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UnableToReadBaseDir(io::Error),
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UnableToReadFile(io::Error),
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ValidatorDirError(ValidatorDirError),
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}
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/// Manages a directory containing multiple `ValidatorDir` directories.
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///
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/// ## Example
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///
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/// ```ignore
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/// validators
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/// └── 0x91494d3ac4c078049f37aa46934ba8cdf5a9cca6e1b9a9e12403d69d8a2c43a25a7f576df2a5a3d7cb3f45e6aa5e2812
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/// ├── eth1_deposit_data.rlp
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/// ├── deposit-tx-hash.txt
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/// ├── voting-keystore.json
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/// └── withdrawal-keystore.json
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/// ```
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pub struct Manager {
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dir: PathBuf,
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}
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impl Manager {
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/// Open a directory containing multiple validators.
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///
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/// Pass the `validators` director as `dir` (see struct-level example).
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pub fn open<P: AsRef<Path>>(dir: P) -> Result<Self, Error> {
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let dir: PathBuf = dir.as_ref().into();
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if dir.exists() {
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Ok(Self { dir })
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} else {
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Err(Error::DirectoryDoesNotExist(dir))
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}
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}
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/// Iterate the nodes in `self.dir`, filtering out things that are unlikely to be a validator
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/// directory.
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fn iter_dir(&self) -> Result<Vec<PathBuf>, Error> {
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read_dir(&self.dir)
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.map_err(Error::UnableToReadBaseDir)?
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.map(|file_res| file_res.map(|f| f.path()))
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// We use `map_or` with `true` here to ensure that we always fail if there is any
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// error.
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.filter(|path_res| path_res.as_ref().map_or(true, |p| p.is_dir()))
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.map(|res| res.map_err(Error::UnableToReadFile))
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.collect()
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}
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/// Open a `ValidatorDir` at the given `path`.
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///
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/// ## Note
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///
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/// It is not enforced that `path` is contained in `self.dir`.
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pub fn open_validator<P: AsRef<Path>>(&self, path: P) -> Result<ValidatorDir, Error> {
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ValidatorDir::open(path).map_err(Error::ValidatorDirError)
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}
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/// Opens all the validator directories in `self`.
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///
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/// ## Errors
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///
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/// Returns an error if any of the directories is unable to be opened, perhaps due to a
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/// file-system error or directory with an active lockfile.
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pub fn open_all_validators(&self) -> Result<Vec<ValidatorDir>, Error> {
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self.iter_dir()?
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.into_iter()
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.map(|path| ValidatorDir::open(path).map_err(Error::ValidatorDirError))
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.collect()
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}
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/// Opens all the validator directories in `self` and decrypts the validator keypairs.
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///
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/// If `log.is_some()`, an `info` log will be generated for each decrypted validator.
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///
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/// ## Errors
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///
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/// Returns an error if any of the directories is unable to be opened.
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pub fn decrypt_all_validators(
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&self,
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secrets_dir: PathBuf,
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log_opt: Option<&Logger>,
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) -> Result<Vec<(Keypair, ValidatorDir)>, Error> {
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self.iter_dir()?
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.into_par_iter()
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.map(|path| {
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ValidatorDir::open(path)
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.and_then(|v| v.voting_keypair(&secrets_dir).map(|kp| (kp, v)))
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.map(|(kp, v)| {
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if let Some(log) = log_opt {
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info!(
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log,
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"Decrypted validator keystore";
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"voting_pubkey" => kp.pk.as_hex_string()
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)
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}
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(kp, v)
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})
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.map_err(Error::ValidatorDirError)
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})
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.collect()
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}
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/// Returns a map of directory name to full directory path. E.g., `myval -> /home/vals/myval`.
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/// Filters out nodes in `self.dir` that are unlikely to be a validator directory.
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///
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/// ## Errors
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///
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/// Returns an error if a directory is unable to be read.
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pub fn directory_names(&self) -> Result<HashMap<String, PathBuf>, Error> {
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Ok(HashMap::from_iter(
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self.iter_dir()?
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.into_iter()
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.map(|path| (format!("{:?}", path), path)),
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))
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}
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}
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