Struct LaunchContext 

pub struct LaunchContext {
    pub task_executor: TaskExecutor,
    pub data_dir: ChainPath<DataDirPath>,
}

Reusable setup for launching a node.

This is the entry point for the node launch process. It implements a builder pattern using type-state programming to enforce correct initialization order.

Type Evolution

Starting from LaunchContext, each method transforms the type to reflect accumulated state:

LaunchContext
  └─> LaunchContextWith<WithConfigs>
      └─> LaunchContextWith<Attached<WithConfigs, DB>>
          └─> LaunchContextWith<Attached<WithConfigs, ProviderFactory>>
              └─> LaunchContextWith<Attached<WithConfigs, WithMeteredProviders>>
                  └─> LaunchContextWith<Attached<WithConfigs, WithComponents>>

Fields

task_executor: TaskExecutor

The task executor for the node.

data_dir: ChainPath<DataDirPath>

The data directory for the node.

Implementations

impl LaunchContext

pub const fn new( task_executor: TaskExecutor, data_dir: ChainPath<DataDirPath>, ) -> Self

Create a new instance of the default node launcher.

pub const fn with<T>(self, attachment: T) -> LaunchContextWith<T>

Create launch context with attachment.

pub fn with_loaded_toml_config<ChainSpec>( self, config: NodeConfig<ChainSpec>, ) -> Result<LaunchContextWith<WithConfigs<ChainSpec>>>

where ChainSpec: EthChainSpec + EthereumHardforks,

Loads the reth config with the configured data_dir and overrides settings according to the config.

Attaches both the NodeConfig and the loaded reth.toml config to the launch context.

pub fn load_toml_config<ChainSpec>( &self, config: &NodeConfig<ChainSpec>, ) -> Result<Config>

where ChainSpec: EthChainSpec + EthereumHardforks,

Loads the reth config with the configured data_dir and overrides settings according to the config.

This is async because the trusted peers may have to be resolved.

pub fn with_configured_globals(self, reserved_cpu_cores: usize) -> Self

Convenience function to Self::configure_globals

pub fn configure_globals(&self, reserved_cpu_cores: usize)

Configure global settings this includes:

• Raising the file descriptor limit
• Configuring the global rayon thread pool for implicit par_iter usage

Trait Implementations

impl Clone for LaunchContext

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LaunchContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 144 bytes