62 lines
1.7 KiB
Rust
62 lines
1.7 KiB
Rust
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/// Pulls down the latest Lighthouse testnet from https://github.com/eth2-clients/eth2-testnets
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use reqwest;
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use std::env;
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use std::fs::File;
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use std::io::Write;
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use std::path::PathBuf;
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const TESTNET_ID: &str = "testnet5";
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fn main() {
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match get_all_files() {
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Ok(()) => (),
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Err(e) => panic!(e),
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}
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}
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pub fn get_all_files() -> Result<(), String> {
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if !base_dir().exists() {
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std::fs::create_dir_all(base_dir())
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.map_err(|e| format!("Unable to create {:?}: {}", base_dir(), e))?;
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get_file("boot_enr.yaml")?;
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get_file("config.yaml")?;
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get_file("deploy_block.txt")?;
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get_file("deposit_contract.txt")?;
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get_file("genesis.ssz")?;
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}
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Ok(())
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}
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pub fn get_file(filename: &str) -> Result<(), String> {
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let url = format!(
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"https://raw.githubusercontent.com/eth2-clients/eth2-testnets/master/lighthouse/{}/{}",
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TESTNET_ID, filename
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);
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let path = base_dir().join(filename);
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let mut file =
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File::create(path).map_err(|e| format!("Failed to create {}: {:?}", filename, e))?;
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let mut response =
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reqwest::get(&url).map_err(|e| format!("Failed to download {}: {}", filename, e))?;
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let mut contents: Vec<u8> = vec![];
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response
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.copy_to(&mut contents)
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.map_err(|e| format!("Failed to read {} response bytes: {}", filename, e))?;
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file.write(&contents)
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.map_err(|e| format!("Failed to write to {}: {:?}", filename, e))?;
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Ok(())
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}
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fn base_dir() -> PathBuf {
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env::var("CARGO_MANIFEST_DIR")
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.expect("should know manifest dir")
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.parse::<PathBuf>()
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.expect("should parse manifest dir as path")
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.join(TESTNET_ID)
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}
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