// This file is part of Substrate.
// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//! Implementation of the `generate` subcommand
use crate::{
utils::print_from_uri, with_crypto_scheme, CryptoSchemeFlag, Error, KeystoreParams,
NetworkSchemeFlag, OutputTypeFlag,
};
use bip39::Mnemonic;
use clap::Parser;
use itertools::Itertools;
/// The `generate` command
#[derive(Debug, Clone, Parser)]
#[command(name = "generate", about = "Generate a random account")]
pub struct GenerateCmd {
/// The number of words in the phrase to generate. One of 12 (default), 15, 18, 21 and 24.
#[arg(short = 'w', long, value_name = "WORDS")]
words: Option<usize>,
#[allow(missing_docs)]
#[clap(flatten)]
pub keystore_params: KeystoreParams,
#[allow(missing_docs)]
#[clap(flatten)]
pub network_scheme: NetworkSchemeFlag,
#[allow(missing_docs)]
#[clap(flatten)]
pub output_scheme: OutputTypeFlag,
#[allow(missing_docs)]
#[clap(flatten)]
pub crypto_scheme: CryptoSchemeFlag,
}
impl GenerateCmd {
/// Run the command
pub fn run(&self) -> Result<(), Error> {
let words = match self.words {
Some(words_count) if [12, 15, 18, 21, 24].contains(&words_count) => Ok(words_count),
Some(_) => Err(Error::Input(
"Invalid number of words given for phrase: must be 12/15/18/21/24".into(),
)),
None => Ok(12),
}?;
let mnemonic = Mnemonic::generate(words)
.map_err(|e| Error::Input(format!("Mnemonic generation failed: {e}").into()))?;
let password = self.keystore_params.read_password()?;
let output = self.output_scheme.output_type;
let phrase = mnemonic.words().join(" ");
with_crypto_scheme!(
self.crypto_scheme.scheme,
print_from_uri(&phrase, password, self.network_scheme.network, output)
);
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn generate() {
let generate = GenerateCmd::parse_from(&["generate", "--password", "12345"]);
assert!(generate.run().is_ok())
}
}