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Mnemonic key recovery (#1579)

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## Issue Addressed

N/A

## Proposed Changes

Add a  `lighthouse am wallet recover` command that recreates a wallet from a mnemonic but no validator keys.  Add a `lighthouse am validator recover` command which would directly create keys from a mnemonic for a given index and count.

## Additional Info


Co-authored-by: Paul Hauner <paul@paulhauner.com>
This commit is contained in:
realbigsean
2020-09-08 12:17:51 +00:00
parent 00cdc4bb35
commit 9cf8f45192
11 changed files with 443 additions and 36 deletions
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87
account_manager/src/wallet/recover.rs Normal file
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use crate::common::read_mnemonic_from_cli;
use crate::wallet::create::create_wallet_from_mnemonic;
use crate::wallet::create::{HD_TYPE, NAME_FLAG, PASSWORD_FLAG, TYPE_FLAG};
use clap::{App, Arg, ArgMatches};
use std::path::PathBuf;
pub const CMD: &str = "recover";
pub const MNEMONIC_FLAG: &str = "mnemonic-path";
pub const STDIN_PASSWORD_FLAG: &str = "stdin-passwords";
pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
App::new(CMD)
.about("Recovers an EIP-2386 wallet from a given a BIP-39 mnemonic phrase.")
.arg(
Arg::with_name(NAME_FLAG)
.long(NAME_FLAG)
.value_name("WALLET_NAME")
.help(
"The wallet will be created with this name. It is not allowed to \
create two wallets with the same name for the same --base-dir.",
)
.takes_value(true)
.required(true),
)
.arg(
Arg::with_name(PASSWORD_FLAG)
.long(PASSWORD_FLAG)
.value_name("PASSWORD_FILE_PATH")
.help(
"This will be the new password for your recovered wallet. \
A path to a file containing the password which will unlock the wallet. \
If the file does not exist, a random password will be generated and \
saved at that path. To avoid confusion, if the file does not already \
exist it must include a '.pass' suffix.",
)
.takes_value(true)
.required(true),
)
.arg(
Arg::with_name(MNEMONIC_FLAG)
.long(MNEMONIC_FLAG)
.value_name("MNEMONIC_PATH")
.help("If present, the mnemonic will be read in from this file.")
.takes_value(true),
)
.arg(
Arg::with_name(TYPE_FLAG)
.long(TYPE_FLAG)
.value_name("WALLET_TYPE")
.help(
"The type of wallet to create. Only HD (hierarchical-deterministic) \
wallets are supported presently..",
)
.takes_value(true)
.possible_values(&[HD_TYPE])
.default_value(HD_TYPE),
)
.arg(
Arg::with_name(STDIN_PASSWORD_FLAG)
.long(STDIN_PASSWORD_FLAG)
.help("If present, read passwords from stdin instead of tty."),
)
}
pub fn cli_run(matches: &ArgMatches, wallet_base_dir: PathBuf) -> Result<(), String> {
let mnemonic_path: Option<PathBuf> = clap_utils::parse_optional(matches, MNEMONIC_FLAG)?;
let stdin_password = matches.is_present(STDIN_PASSWORD_FLAG);
eprintln!("");
eprintln!("WARNING: KEY RECOVERY CAN LEAD TO DUPLICATING VALIDATORS KEYS, WHICH CAN LEAD TO SLASHING.");
eprintln!("");
let mnemonic = read_mnemonic_from_cli(mnemonic_path, stdin_password)?;
let wallet = create_wallet_from_mnemonic(matches, &wallet_base_dir.as_path(), &mnemonic)
.map_err(|e| format!("Unable to create wallet: {:?}", e))?;
println!("Your wallet has been successfully recovered.");
println!();
println!("Your wallet's UUID is:");
println!();
println!("\t{}", wallet.wallet().uuid());
println!();
println!("You do not need to backup your UUID or keep it secret.");
Ok(())
}