helios/examples/basic.rs

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use std::{path::PathBuf, str::FromStr};
use env_logger::Env;
use ethers::{types::Address, utils};
use eyre::Result;
use helios::{config::networks::Network, prelude::*};
#[tokio::main]
async fn main() -> Result<()> {
env_logger::Builder::from_env(Env::default().default_filter_or("info")).init();
let untrusted_rpc_url = "https://eth-mainnet.g.alchemy.com/v2/<YOUR_API_KEY>";
log::info!("Using untrusted RPC URL [REDACTED]");
let consensus_rpc = "https://www.lightclientdata.org";
log::info!("Using consensus RPC URL: {}", consensus_rpc);
let mut client: Client<FileDB> = ClientBuilder::new()
.network(Network::MAINNET)
.consensus_rpc(consensus_rpc)
.execution_rpc(untrusted_rpc_url)
.load_external_fallback()
.data_dir(PathBuf::from("/tmp/helios"))
.build()?;
log::info!(
"Built client on network \"{}\" with external checkpoint fallbacks",
Network::MAINNET
);
client.start().await?;
let head_block_num = client.get_block_number().await?;
let addr = Address::from_str("0x00000000219ab540356cBB839Cbe05303d7705Fa")?;
let block = BlockTag::Latest;
let balance = client.get_balance(&addr, block).await?;
log::info!("synced up to block: {}", head_block_num);
log::info!(
"balance of deposit contract: {}",
utils::format_ether(balance)
);
Ok(())
}