69 lines
2.3 KiB
Rust
69 lines
2.3 KiB
Rust
//! Extracts zipped genesis states on first run.
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use eth2_config::{
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altona, mainnet, medalla, prater, pyrmont, spadina, toledo, Eth2NetArchiveAndDirectory,
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GENESIS_FILE_NAME,
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};
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use std::fs::File;
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use std::io;
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use zip::ZipArchive;
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const ETH2_NET_DIRS: &[Eth2NetArchiveAndDirectory<'static>] = &[
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altona::ETH2_NET_DIR,
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medalla::ETH2_NET_DIR,
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spadina::ETH2_NET_DIR,
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mainnet::ETH2_NET_DIR,
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pyrmont::ETH2_NET_DIR,
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toledo::ETH2_NET_DIR,
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prater::ETH2_NET_DIR,
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];
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fn main() {
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for network in ETH2_NET_DIRS {
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match uncompress_state(network) {
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Ok(()) => (),
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Err(e) => panic!(
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"Failed to uncompress {} genesis state zip file: {}",
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network.name, e
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),
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}
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}
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}
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/// Uncompress the network configs archive into a network configs folder.
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fn uncompress_state(network: &Eth2NetArchiveAndDirectory<'static>) -> Result<(), String> {
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let genesis_ssz_path = network.dir().join(GENESIS_FILE_NAME);
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// Take care to not overwrite the genesis.ssz if it already exists, as that causes
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// spurious rebuilds.
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if genesis_ssz_path.exists() {
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return Ok(());
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}
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if network.genesis_is_known {
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// Extract genesis state from genesis.ssz.zip
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let archive_path = network.genesis_state_archive();
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let archive_file = File::open(&archive_path)
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.map_err(|e| format!("Failed to open archive file {:?}: {:?}", archive_path, e))?;
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let mut archive =
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ZipArchive::new(archive_file).map_err(|e| format!("Error with zip file: {}", e))?;
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let mut file = archive.by_name(GENESIS_FILE_NAME).map_err(|e| {
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format!(
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"Error retrieving file {} inside zip: {}",
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GENESIS_FILE_NAME, e
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)
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})?;
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let mut outfile = File::create(&genesis_ssz_path)
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.map_err(|e| format!("Error while creating file {:?}: {}", genesis_ssz_path, e))?;
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io::copy(&mut file, &mut outfile)
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.map_err(|e| format!("Error writing file {:?}: {}", genesis_ssz_path, e))?;
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} else {
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// Create empty genesis.ssz if genesis is unknown
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File::create(genesis_ssz_path)
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.map_err(|e| format!("Failed to create {}: {}", GENESIS_FILE_NAME, e))?;
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}
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Ok(())
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}
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