161 lines
5.0 KiB
Rust
161 lines
5.0 KiB
Rust
use clap::ArgMatches;
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use network::NetworkConfig;
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use serde_derive::{Deserialize, Serialize};
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use slog::{info, o, Drain};
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use std::fs::{self, OpenOptions};
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use std::path::PathBuf;
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use std::sync::Mutex;
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/// The number initial validators when starting the `Minimal`.
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const TESTNET_SPEC_CONSTANTS: &str = "minimal";
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/// The core configuration of a Lighthouse beacon node.
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct Config {
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pub data_dir: PathBuf,
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pub db_type: String,
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db_name: String,
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pub log_file: PathBuf,
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pub spec_constants: String,
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/// Defines how we should initialize a BeaconChain instances.
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///
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/// This field is not serialized, there for it will not be written to (or loaded from) config
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/// files. It can only be configured via the CLI.
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#[serde(skip)]
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pub beacon_chain_start_method: BeaconChainStartMethod,
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pub network: network::NetworkConfig,
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pub rpc: rpc::RPCConfig,
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pub rest_api: rest_api::ApiConfig,
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}
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/// Defines how the client should initialize a BeaconChain.
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///
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/// In general, there are two methods:
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/// - resuming a new chain, or
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/// - initializing a new one.
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#[derive(Debug, Clone)]
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pub enum BeaconChainStartMethod {
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/// Resume from an existing BeaconChain, loaded from the existing local database.
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Resume,
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/// Resume from an existing BeaconChain, loaded from the existing local database.
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Mainnet,
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/// Create a new beacon chain that can connect to mainnet.
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///
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/// Set the genesis time to be the start of the previous 30-minute window.
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RecentGenesis {
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validator_count: usize,
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minutes: u64,
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},
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/// Create a new beacon chain with `genesis_time` and `validator_count` validators, all with well-known
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/// secret keys.
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Generated {
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validator_count: usize,
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genesis_time: u64,
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},
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/// Create a new beacon chain by loading a YAML-encoded genesis state from a file.
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Yaml { file: PathBuf },
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/// Create a new beacon chain by using a HTTP server (running our REST-API) to load genesis and
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/// finalized states and blocks.
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HttpBootstrap { server: String, port: Option<u16> },
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}
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impl Default for BeaconChainStartMethod {
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fn default() -> Self {
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BeaconChainStartMethod::Resume
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}
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}
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impl Default for Config {
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fn default() -> Self {
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Self {
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data_dir: PathBuf::from(".lighthouse"),
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log_file: PathBuf::from(""),
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db_type: "disk".to_string(),
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db_name: "chain_db".to_string(),
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network: NetworkConfig::new(),
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rpc: <_>::default(),
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rest_api: <_>::default(),
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spec_constants: TESTNET_SPEC_CONSTANTS.into(),
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beacon_chain_start_method: <_>::default(),
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}
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}
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}
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impl Config {
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/// Returns the path to which the client may initialize an on-disk database.
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pub fn db_path(&self) -> Option<PathBuf> {
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self.data_dir()
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.and_then(|path| Some(path.join(&self.db_name)))
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}
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/// Returns the core path for the client.
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///
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/// Creates the directory if it does not exist.
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pub fn data_dir(&self) -> Option<PathBuf> {
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let path = dirs::home_dir()?.join(&self.data_dir);
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fs::create_dir_all(&path).ok()?;
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Some(path)
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}
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// Update the logger to output in JSON to specified file
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fn update_logger(&mut self, log: &mut slog::Logger) -> Result<(), &'static str> {
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let file = OpenOptions::new()
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.create(true)
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.write(true)
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.truncate(true)
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.open(&self.log_file);
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if file.is_err() {
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return Err("Cannot open log file");
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}
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let file = file.unwrap();
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if let Some(file) = self.log_file.to_str() {
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info!(
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*log,
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"Log file specified, output will now be written to {} in json.", file
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);
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} else {
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info!(
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*log,
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"Log file specified output will now be written in json"
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);
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}
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let drain = Mutex::new(slog_json::Json::default(file)).fuse();
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let drain = slog_async::Async::new(drain).build().fuse();
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*log = slog::Logger::root(drain, o!());
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Ok(())
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}
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/// Apply the following arguments to `self`, replacing values if they are specified in `args`.
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///
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/// Returns an error if arguments are obviously invalid. May succeed even if some values are
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/// invalid.
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pub fn apply_cli_args(
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&mut self,
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args: &ArgMatches,
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log: &mut slog::Logger,
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) -> Result<(), String> {
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if let Some(dir) = args.value_of("datadir") {
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self.data_dir = PathBuf::from(dir);
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};
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if let Some(dir) = args.value_of("db") {
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self.db_type = dir.to_string();
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};
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self.network.apply_cli_args(args)?;
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self.rpc.apply_cli_args(args)?;
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self.rest_api.apply_cli_args(args)?;
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if let Some(log_file) = args.value_of("logfile") {
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self.log_file = PathBuf::from(log_file);
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self.update_logger(log)?;
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};
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Ok(())
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}
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}
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