82a0973935
## Issue Addressed Fixes #1433 ## Proposed Changes Fix the computation for EnrForkId for generating pre-genesis enr.
64 lines
2.4 KiB
Rust
64 lines
2.4 KiB
Rust
use clap::ArgMatches;
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use eth2_libp2p::{
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discovery::{build_enr, CombinedKey, CombinedKeyExt, Keypair, ENR_FILENAME},
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NetworkConfig, NETWORK_KEY_FILENAME,
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};
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use std::fs;
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use std::fs::File;
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use std::io::Write;
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use std::net::IpAddr;
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use std::path::PathBuf;
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use types::{ChainSpec, EnrForkId, Epoch, EthSpec, Hash256};
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pub fn run<T: EthSpec>(matches: &ArgMatches) -> Result<(), String> {
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let ip: IpAddr = clap_utils::parse_required(matches, "ip")?;
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let udp_port: u16 = clap_utils::parse_required(matches, "udp-port")?;
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let tcp_port: u16 = clap_utils::parse_required(matches, "tcp-port")?;
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let output_dir: PathBuf = clap_utils::parse_required(matches, "output-dir")?;
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let genesis_fork_version: [u8; 4] =
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clap_utils::parse_ssz_required(matches, "genesis-fork-version")?;
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if output_dir.exists() {
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return Err(format!(
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"{:?} already exists, will not override",
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output_dir
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));
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}
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let mut config = NetworkConfig::default();
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config.enr_address = Some(ip);
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config.enr_udp_port = Some(udp_port);
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config.enr_tcp_port = Some(tcp_port);
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let local_keypair = Keypair::generate_secp256k1();
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let enr_key = CombinedKey::from_libp2p(&local_keypair)?;
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let enr_fork_id = EnrForkId {
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fork_digest: ChainSpec::compute_fork_digest(genesis_fork_version, Hash256::zero()),
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next_fork_version: genesis_fork_version,
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next_fork_epoch: Epoch::max_value(), // FAR_FUTURE_EPOCH
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};
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let enr = build_enr::<T>(&enr_key, &config, enr_fork_id)
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.map_err(|e| format!("Unable to create ENR: {:?}", e))?;
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fs::create_dir_all(&output_dir).map_err(|e| format!("Unable to create output-dir: {:?}", e))?;
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let mut enr_file = File::create(output_dir.join(ENR_FILENAME))
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.map_err(|e| format!("Unable to create {}: {:?}", ENR_FILENAME, e))?;
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enr_file
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.write_all(&enr.to_base64().as_bytes())
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.map_err(|e| format!("Unable to write ENR to {}: {:?}", ENR_FILENAME, e))?;
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let secret_bytes = match local_keypair {
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Keypair::Secp256k1(key) => key.secret().to_bytes(),
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_ => return Err("Key is not a secp256k1 key".into()),
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};
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let mut key_file = File::create(output_dir.join(NETWORK_KEY_FILENAME))
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.map_err(|e| format!("Unable to create {}: {:?}", NETWORK_KEY_FILENAME, e))?;
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key_file
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.write_all(&secret_bytes)
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.map_err(|e| format!("Unable to write key to {}: {:?}", NETWORK_KEY_FILENAME, e))?;
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Ok(())
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}
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