pallet_revive_eth_rpc/

cli.rs

// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! The Ethereum JSON-RPC server.
use crate::{
	DbContext, DebugRpcServer, DebugRpcServerImpl, EthRpcServer, EthRpcServerImpl, LOG_TARGET,
	PolkadotRpcServer, PolkadotRpcServerImpl, ReceiptExtractor, ReceiptProvider,
	SubxtBlockInfoProvider, SystemHealthRpcServer, SystemHealthRpcServerImpl,
	client::{Client, ClientError, SubscriptionGapQueue, SubscriptionType, connect},
};
use clap::{CommandFactory, FromArgMatches, Parser};
use futures::{FutureExt, future::BoxFuture, pin_mut};
use jsonrpsee::server::RpcModule;
use sc_cli::{PrometheusParams, RpcParams, SharedParams, Signals};
use sc_service::{
	TaskManager,
	config::{BasePath, PrometheusConfig, RpcConfiguration},
	create_rpc_runtime, start_rpc_servers,
};
use sqlx::{
	SqlitePool,
	sqlite::{SqliteConnectOptions, SqliteJournalMode, SqlitePoolOptions},
};
use std::path::PathBuf;

/// Query the maximum number of bound parameters SQLite allows per query
async fn sqlite_db_query_max_variable_number(pool: &SqlitePool) -> usize {
	let limit = async {
		let mut conn = pool
			.acquire()
			.await
			.inspect_err(|e| log::warn!(target: LOG_TARGET, "💾 Failed to acquire connection: {e}"))
			.ok()?;
		let mut handle = conn
			.lock_handle()
			.await
			.inspect_err(|e| log::warn!(target: LOG_TARGET, "💾 Failed to lock handle: {e}"))
			.ok()?;
		// SAFETY: `lock_handle` guarantees the raw pointer is valid for
		// the lifetime of the guard, and passing -1 only queries the limit.
		let raw = unsafe {
			libsqlite3_sys::sqlite3_limit(
				handle.as_raw_handle().as_ptr(),
				libsqlite3_sys::SQLITE_LIMIT_VARIABLE_NUMBER,
				-1,
			)
		};
		raw.try_into().ok()
	}
	.await;

	let default = DbContext::DEFAULT_MAX_VARIABLE_NUMBER;
	limit.inspect(|n| log::info!(target: LOG_TARGET, "💾 SQLite db_query_max_variable_number: {n}"))
		.unwrap_or_else(|| {
			log::warn!(target: LOG_TARGET, "💾 Failed to query SQLite variable limit, falling back to {default}");
			default
		})
}

/// Specifies the eth-rpc pruning mode.
#[derive(Debug, Clone, Copy, PartialEq, Eq, derive_more::Display)]
pub enum EthPruningMode {
	/// Persistent on-disk database with backward historical sync of all blocks.
	#[display(fmt = "archive")]
	Archive,
	/// In-memory database keeping only the latest N blocks.
	#[display(fmt = "{_0}")]
	KeepLatest(usize),
}

impl EthPruningMode {
	/// Returns `true` if this mode enables historical block sync.
	pub fn is_archive(&self) -> bool {
		matches!(self, Self::Archive)
	}

	/// Returns the number of blocks to keep, if in `KeepLatest` mode.
	pub fn keep_latest(&self) -> Option<usize> {
		match self {
			Self::KeepLatest(n) => Some(*n),
			_ => None,
		}
	}
}

impl std::str::FromStr for EthPruningMode {
	type Err = String;

	fn from_str(input: &str) -> Result<Self, Self::Err> {
		match input {
			"archive" => Ok(Self::Archive),
			n => {
				n.parse::<usize>()
					.ok()
					.filter(|&v| v >= 1)
					.map(Self::KeepLatest)
					.ok_or_else(|| {
						format!(
							"Invalid pruning mode '{n}': expected 'archive' or a positive integer"
						)
					})
			},
		}
	}
}

// Default port if --prometheus-port is not specified
const DEFAULT_PROMETHEUS_PORT: u16 = 9616;

// Default port if --rpc-port is not specified
const DEFAULT_RPC_PORT: u16 = 8545;

const DEFAULT_DATABASE_NAME: &str = "eth-rpc.db";

// Parsed command instructions from the command line
#[derive(Parser, Debug)]
#[clap(author, about, version)]
pub struct CliCommand {
	/// The node url to connect to
	#[clap(long, default_value = "ws://127.0.0.1:9944")]
	pub node_rpc_url: String,

	/// Pruning mode for the eth-rpc receipt database.
	///
	/// - archive (default): Sync all historical blocks (requires an archive node).
	/// - N (>= 1): In-memory database keeping only the latest N blocks.
	#[clap(long, default_value = "archive")]
	pub eth_pruning: EthPruningMode,

	#[allow(missing_docs)]
	#[clap(flatten)]
	pub shared_params: SharedParams,

	#[allow(missing_docs)]
	#[clap(flatten)]
	pub rpc_params: RpcParams,

	#[allow(missing_docs)]
	#[clap(flatten)]
	pub prometheus_params: PrometheusParams,

	/// By default, the node rejects any transaction that's unprotected (i.e., that doesn't have a
	/// chain-id). If the user wishes the submit such a transaction then they can use this flag to
	/// instruct the RPC to ignore this check.
	#[arg(long)]
	pub allow_unprotected_txs: bool,
}

impl CliCommand {
	/// Parse CLI args, rejecting any removed flags with a helpful message.
	pub fn parse_cli() -> anyhow::Result<Self> {
		let removed_flags =
			["database-url", "cache-size", "index-last-n-blocks", "earliest-receipt-block"];

		let cmd = removed_flags.iter().fold(Self::command(), |cmd, name| {
			cmd.arg(
				clap::Arg::new(*name)
					.long(*name)
					.num_args(0..=1)
					.hide(true)
					.action(clap::ArgAction::Set),
			)
		});
		let matches = cmd.get_matches();

		let used: Vec<_> = removed_flags
			.iter()
			.filter(|f| matches.contains_id(f))
			.map(|f| format!("--{f}"))
			.collect();
		if !used.is_empty() {
			anyhow::bail!(
				"[{}] have been removed. \
				 Check polkadot-sdk PR #11153 for the CLI migration guide.",
				used.join(", "),
			);
		}

		Ok(Self::from_arg_matches(&matches).expect("already validated by clap"))
	}
}

/// Initialize the logger
#[cfg(not(test))]
fn init_logger(params: &SharedParams) -> anyhow::Result<()> {
	let mut logger = sc_cli::LoggerBuilder::new(params.log_filters().join(","));
	logger
		.with_log_reloading(params.enable_log_reloading)
		.with_detailed_output(params.detailed_log_output);

	if let Some(tracing_targets) = &params.tracing_targets {
		let tracing_receiver = params.tracing_receiver.into();
		logger.with_profiling(tracing_receiver, tracing_targets);
	}

	if params.disable_log_color {
		logger.with_colors(false);
	}

	logger.init()?;
	Ok(())
}

/// Resolve the base directory for persistent database storage.
///
/// - If `base_path` is `Some` (explicit `--base-path` or `--dev` temp dir), use it directly.
/// - If `base_path` is `None`, use the platform default:
///   - macOS: `~/Library/Application Support/eth-rpc/`
///   - Linux: `~/.local/share/eth-rpc/`
///   - Windows: `%APPDATA%\eth-rpc\`
fn resolve_db_dir(base_path: Option<BasePath>) -> PathBuf {
	match base_path {
		Some(path) => path.path().to_path_buf(),
		None => BasePath::from_project("", "", "eth-rpc").path().to_path_buf(),
	}
}

/// Resolve SQLite connection options from CLI arguments.
fn resolve_db_options(
	eth_pruning: EthPruningMode,
	base_path: Option<BasePath>,
) -> anyhow::Result<SqliteConnectOptions> {
	if eth_pruning.is_archive() {
		let db_dir = resolve_db_dir(base_path);
		std::fs::create_dir_all(&db_dir).map_err(|e| {
			anyhow::anyhow!("Failed to create database directory {}: {e}", db_dir.display())
		})?;
		let db_path = db_dir.join(DEFAULT_DATABASE_NAME);
		log::info!(target: LOG_TARGET, "💾 Database path: {}", db_path.display());
		// WAL mode allows concurrent writes from the live subscription
		// and the backward sync without SQLITE_BUSY errors.
		Ok(SqliteConnectOptions::new()
			.filename(&db_path)
			.create_if_missing(true)
			.journal_mode(SqliteJournalMode::Wal))
	} else {
		Ok(SqliteConnectOptions::new().in_memory(true))
	}
}

fn build_client(
	tokio_handle: &tokio::runtime::Handle,
	eth_pruning: EthPruningMode,
	node_rpc_url: &str,
	db_options: SqliteConnectOptions,
	max_request_size: u32,
	max_response_size: u32,
	abort_signal: Signals,
	subscription_gap_queue: SubscriptionGapQueue,
) -> anyhow::Result<Client> {
	let fut = async {
		let (api, rpc_client, rpc) =
			connect(node_rpc_url, max_request_size, max_response_size).await?;
		let block_provider = SubxtBlockInfoProvider::new(api.clone(), rpc.clone()).await?;

		let (pool, keep_latest_n_blocks) = match eth_pruning {
			EthPruningMode::Archive => {
				(SqlitePoolOptions::new().connect_with(db_options).await?, None)
			},
			EthPruningMode::KeepLatest(max_blocks) => {
				log::info!(target: LOG_TARGET,
					"💾 Using in-memory database, keeping only {max_blocks} blocks");
				// see sqlite in-memory issue: https://github.com/launchbadge/sqlx/issues/2510
				let pool = SqlitePoolOptions::new()
					.max_connections(1)
					.idle_timeout(None)
					.max_lifetime(None)
					.connect_with(db_options)
					.await?;
				(pool, Some(max_blocks))
			},
		};

		let receipt_extractor = ReceiptExtractor::new(api.clone()).await?;
		let max_variable_number = sqlite_db_query_max_variable_number(&pool).await;
		let db_ctx = DbContext::new(pool, max_variable_number);

		let receipt_provider = ReceiptProvider::new(
			db_ctx,
			block_provider.clone(),
			receipt_extractor.clone(),
			keep_latest_n_blocks,
		)
		.await?;

		let client = Client::new(
			api,
			rpc_client,
			rpc,
			block_provider,
			receipt_provider,
			eth_pruning.is_archive(),
			subscription_gap_queue,
		)
		.await?;

		Ok(client)
	}
	.fuse();
	pin_mut!(fut);

	match tokio_handle.block_on(abort_signal.try_until_signal(fut)) {
		Ok(Ok(client)) => Ok(client),
		Ok(Err(err)) => Err(err),
		Err(_) => anyhow::bail!("Process interrupted"),
	}
}

/// Start the JSON-RPC server using the given command line arguments.
pub fn run(cmd: CliCommand) -> anyhow::Result<()> {
	let CliCommand {
		rpc_params,
		prometheus_params,
		node_rpc_url,
		eth_pruning,
		shared_params,
		allow_unprotected_txs,
		..
	} = cmd;

	#[cfg(not(test))]
	init_logger(&shared_params)?;
	let is_dev = shared_params.dev;
	let explicit_base_path = shared_params.base_path.is_some();
	let base_path = shared_params.base_path()?;

	if is_dev && eth_pruning.is_archive() && !explicit_base_path {
		log::warn!(
			target: LOG_TARGET,
			"⚠️  Running in --dev mode with --eth-pruning=archive but no --base-path. \
			 The database will be stored in a temporary directory and lost on exit. \
			 Use --base-path to persist the database."
		);
	}

	let db_options = resolve_db_options(eth_pruning, base_path)?;

	let rpc_addrs: Option<Vec<sc_service::config::RpcEndpoint>> = rpc_params
		.rpc_addr(is_dev, false, DEFAULT_RPC_PORT)?
		.map(|addrs| addrs.into_iter().map(Into::into).collect());

	let rpc_config = RpcConfiguration {
		addr: rpc_addrs,
		methods: rpc_params.rpc_methods.into(),
		max_connections: rpc_params.rpc_max_connections,
		cors: rpc_params.rpc_cors(is_dev)?,
		max_request_size: rpc_params.rpc_max_request_size,
		max_response_size: rpc_params.rpc_max_response_size,
		id_provider: None,
		max_subs_per_conn: rpc_params.rpc_max_subscriptions_per_connection,
		port: rpc_params.rpc_port.unwrap_or(DEFAULT_RPC_PORT),
		message_buffer_capacity: rpc_params.rpc_message_buffer_capacity_per_connection,
		batch_config: rpc_params.rpc_batch_config()?,
		rate_limit: rpc_params.rpc_rate_limit,
		rate_limit_whitelisted_ips: rpc_params.rpc_rate_limit_whitelisted_ips,
		rate_limit_trust_proxy_headers: rpc_params.rpc_rate_limit_trust_proxy_headers,
		request_logger_limit: if is_dev { 1024 * 1024 } else { 1024 },
	};

	let prometheus_config =
		prometheus_params.prometheus_config(DEFAULT_PROMETHEUS_PORT, "eth-rpc".into());
	let prometheus_registry = prometheus_config.as_ref().map(|config| &config.registry);

	let tokio_runtime = sc_cli::build_runtime()?;
	let tokio_handle = tokio_runtime.handle();
	let mut task_manager = TaskManager::new(tokio_handle.clone(), prometheus_registry)?;

	let (subscription_gap_queue, gap_fill_rx) = SubscriptionGapQueue::new();
	let client = build_client(
		tokio_handle,
		eth_pruning,
		&node_rpc_url,
		db_options,
		rpc_config.max_request_size * 1024 * 1024,
		rpc_config.max_response_size * 1024 * 1024,
		tokio_runtime.block_on(async { Signals::capture() })?,
		subscription_gap_queue,
	)?;

	// Prometheus metrics.
	if let Some(PrometheusConfig { port, registry }) = prometheus_config.clone() {
		task_manager.spawn_handle().spawn(
			"prometheus-endpoint",
			None,
			prometheus_endpoint::init_prometheus(port, registry).map(drop),
		);
	}

	let rpc_runtime = create_rpc_runtime(rpc_config.max_connections)
		.map_err(|e| anyhow::anyhow!("Failed to create RPC runtime: {}", e))?;

	let rpc_api = rpc_module(is_dev, client.clone(), allow_unprotected_txs)?;
	let rpc_server_handle = start_rpc_servers(
		&rpc_config,
		prometheus_registry,
		tokio_handle,
		rpc_api,
		rpc_runtime,
		None,
	)?;

	task_manager
		.spawn_essential_handle()
		.spawn("block-subscription", None, async move {
			let mut futures: Vec<BoxFuture<'_, Result<(), _>>> = vec![
				Box::pin(client.subscribe_and_cache_new_blocks(SubscriptionType::BestBlocks)),
				Box::pin(client.subscribe_and_cache_new_blocks(SubscriptionType::FinalizedBlocks)),
			];

			if eth_pruning.is_archive() {
				futures.push(Box::pin(client.sync_backward()));
			}

			// Backfill gaps caused by subscription reconnects.
			futures.push(Box::pin(async {
				client.run_subscription_gap_filler(gap_fill_rx).await;
				Ok::<_, ClientError>(())
			}));

			if let Err(err) = futures::future::try_join_all(futures).await {
				panic!("Block subscription task failed: {err:?}",)
			}
		});

	task_manager.keep_alive(rpc_server_handle);
	let signals = tokio_runtime.block_on(async { Signals::capture() })?;
	tokio_runtime.block_on(signals.run_until_signal(task_manager.future().fuse()))?;
	Ok(())
}

/// Create the JSON-RPC module.
fn rpc_module(
	is_dev: bool,
	client: Client,
	allow_unprotected_txs: bool,
) -> Result<RpcModule<()>, sc_service::Error> {
	let eth_api = EthRpcServerImpl::new(client.clone())
		.with_accounts(if is_dev {
			vec![
				crate::Account::from(subxt_signer::eth::dev::alith()),
				crate::Account::from(subxt_signer::eth::dev::baltathar()),
				crate::Account::from(subxt_signer::eth::dev::charleth()),
				crate::Account::from(subxt_signer::eth::dev::dorothy()),
				crate::Account::from(subxt_signer::eth::dev::ethan()),
			]
		} else {
			vec![]
		})
		.with_allow_unprotected_txs(allow_unprotected_txs)
		.with_use_pending_for_estimate_gas(is_dev)
		.into_rpc();

	let health_api = SystemHealthRpcServerImpl::new(client.clone()).into_rpc();
	let debug_api = DebugRpcServerImpl::new(client.clone()).into_rpc();
	let polkadot_api = PolkadotRpcServerImpl::new(client).into_rpc();

	let mut module = RpcModule::new(());
	module.merge(eth_api).map_err(|e| sc_service::Error::Application(e.into()))?;
	module.merge(health_api).map_err(|e| sc_service::Error::Application(e.into()))?;
	module.merge(debug_api).map_err(|e| sc_service::Error::Application(e.into()))?;
	module
		.merge(polkadot_api)
		.map_err(|e| sc_service::Error::Application(e.into()))?;
	Ok(module)
}

#[cfg(test)]
mod tests {
	use super::*;
	use tempfile::TempDir;

	#[test]
	fn in_memory_returns_memory_options() {
		let opts = resolve_db_options(EthPruningMode::KeepLatest(256), None).unwrap();
		// In-memory options produce `:memory:` filename.
		let filename = opts.get_filename();
		assert_eq!(filename, std::path::Path::new(":memory:"));
	}

	#[test]
	fn persistent_with_explicit_base_path() {
		let tmp = TempDir::new().unwrap();
		let base = BasePath::new(tmp.path());
		let opts = resolve_db_options(EthPruningMode::Archive, Some(base)).unwrap();
		assert_eq!(opts.get_filename(), tmp.path().join(DEFAULT_DATABASE_NAME));
		assert!(tmp.path().exists());
	}

	#[test]
	fn persistent_default_path() {
		let opts = resolve_db_options(EthPruningMode::Archive, None).unwrap();
		let filename = opts.get_filename().to_string_lossy().to_string();
		assert!(filename.contains("eth-rpc"));
		assert!(filename.contains(DEFAULT_DATABASE_NAME));
	}

	#[test]
	fn persistent_creates_nested_directories() {
		let tmp = TempDir::new().unwrap();
		let nested = tmp.path().join("a").join("b");
		let base = BasePath::new(&nested);
		resolve_db_options(EthPruningMode::Archive, Some(base)).unwrap();
		assert!(nested.exists());
	}

	#[test]
	fn eth_pruning_mode() {
		// CLI parsing
		let cmd = CliCommand::try_parse_from(["eth-rpc", "--eth-pruning", "archive"]).unwrap();
		assert_eq!(cmd.eth_pruning, EthPruningMode::Archive);

		let cmd = CliCommand::try_parse_from(["eth-rpc", "--eth-pruning", "256"]).unwrap();
		assert_eq!(cmd.eth_pruning, EthPruningMode::KeepLatest(256));

		// Default is archive
		let cmd = CliCommand::try_parse_from(["eth-rpc"]).unwrap();
		assert_eq!(cmd.eth_pruning, EthPruningMode::Archive);
	}
}