Consensus Light client

Most of the code in this crate is fork of Helios but it doesn't require running an execution client alongside the light client.

This light client is modified in a way to be compatible with Portal Network.

Running the light client

To run the light client with default configuration and https://www.lightclientdata.org as consensus rpc:

cd trin
cargo run -p light-client

Using light-client crate as a Library

use anyhow::Result;
use light_client::config::networks;
use light_client::database::FileDB;
use light_client::{Client, ClientBuilder};
use std::path::PathBuf;

#[tokio::main]
async fn main() -> Result<()> {
    // Create a new Client Builder
    let mut builder = ClientBuilder::new();

    // Set the network to mainnet
    builder = builder.network(networks::Network::Mainnet);

    // Set the consensus rpc url
    builder = builder.consensus_rpc("https://www.lightclientdata.org");

    // Set the checkpoint to the last known checkpoint
    builder =
        builder.checkpoint("0x760387ebbc6d7c48e421424def00cfd85d71dd8f4ea3a9c0bb2f01b684553a6d");

    // Set the rpc port
    builder = builder.rpc_port(8545);

    // Set the data dir
    builder = builder.data_dir(PathBuf::from("/tmp/light-client"));

    // Set the fallback service
    builder = builder.fallback("https://sync-mainnet.beaconcha.in");

    // Enable lazy checkpoints
    builder = builder.load_external_fallback();

    // Build the client
    let mut client: Client<FileDB> = builder.build().unwrap();

    // Run the client
    client.start().await.unwrap();

    tokio::signal::ctrl_c()
        .await
        .expect("failed to pause until ctrl-c");

    Ok(())
}