openethereum/cli-signer/src/lib.rs

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// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity Ethereum.
// Parity Ethereum 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.
// Parity Ethereum 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 Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
extern crate ethereum_types;
extern crate futures;
extern crate rpassword;
extern crate parity_rpc as rpc;
extern crate parity_rpc_client as client;
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use client::signer_client::SignerRpc;
use ethereum_types::U256;
use rpc::signer::ConfirmationRequest;
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use std::{
fs::File,
io::{stdin, stdout, BufRead, BufReader, Write},
path::PathBuf,
};
use futures::Future;
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fn sign_interactive(signer: &mut SignerRpc, password: &str, request: ConfirmationRequest) {
print!(
"\n{}\nSign this transaction? (y)es/(N)o/(r)eject: ",
request
);
let _ = stdout().flush();
match BufReader::new(stdin()).lines().next() {
Some(Ok(line)) => match line.to_lowercase().chars().nth(0) {
Some('y') => match sign_transaction(signer, request.id, password) {
Ok(s) | Err(s) => println!("{}", s),
},
Some('r') => match reject_transaction(signer, request.id) {
Ok(s) | Err(s) => println!("{}", s),
},
_ => (),
},
_ => println!("Could not read from stdin"),
}
}
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fn sign_transactions(signer: &mut SignerRpc, password: String) -> Result<String, String> {
signer
.requests_to_confirm()
.map(|reqs| match reqs {
Ok(ref reqs) if reqs.is_empty() => Ok("No transactions in signing queue".to_owned()),
Ok(reqs) => {
for r in reqs {
sign_interactive(signer, &password, r)
}
Ok("".to_owned())
}
Err(err) => Err(format!("error: {:?}", err)),
})
.map_err(|err| format!("{:?}", err))
.wait()?
}
fn list_transactions(signer: &mut SignerRpc) -> Result<String, String> {
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signer
.requests_to_confirm()
.map(|reqs| match reqs {
Ok(ref reqs) if reqs.is_empty() => Ok("No transactions in signing queue".to_owned()),
Ok(ref reqs) => Ok(format!(
"Transaction queue:\n{}",
reqs.iter()
.map(|r| format!("{}", r))
.collect::<Vec<String>>()
.join("\n")
)),
Err(err) => Err(format!("error: {:?}", err)),
})
.map_err(|err| format!("{:?}", err))
.wait()?
}
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fn sign_transaction(signer: &mut SignerRpc, id: U256, password: &str) -> Result<String, String> {
signer
.confirm_request(id, None, None, None, password)
.map(|res| match res {
Ok(u) => Ok(format!("Signed transaction id: {:#x}", u)),
Err(e) => Err(format!("{:?}", e)),
})
.map_err(|err| format!("{:?}", err))
.wait()?
}
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fn reject_transaction(signer: &mut SignerRpc, id: U256) -> Result<String, String> {
signer
.reject_request(id)
.map(|res| match res {
Ok(true) => Ok(format!("Rejected transaction id {:#x}", id)),
Ok(false) => Err(format!("No such request")),
Err(e) => Err(format!("{:?}", e)),
})
.map_err(|err| format!("{:?}", err))
.wait()?
}
// cmds
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pub fn signer_list(signerport: u16, authfile: PathBuf) -> Result<String, String> {
let addr = &format!("ws://127.0.0.1:{}", signerport);
let mut signer = SignerRpc::new(addr, &authfile).map_err(|err| format!("{:?}", err))?;
list_transactions(&mut signer)
}
pub fn signer_reject(
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id: Option<usize>,
signerport: u16,
authfile: PathBuf,
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) -> Result<String, String> {
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let id = id.ok_or(format!("id required for signer reject"))?;
let addr = &format!("ws://127.0.0.1:{}", signerport);
let mut signer = SignerRpc::new(addr, &authfile).map_err(|err| format!("{:?}", err))?;
reject_transaction(&mut signer, U256::from(id))
}
pub fn signer_sign(
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id: Option<usize>,
pwfile: Option<PathBuf>,
signerport: u16,
authfile: PathBuf,
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) -> Result<String, String> {
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let password;
match pwfile {
Some(pwfile) => match File::open(pwfile) {
Ok(fd) => match BufReader::new(fd).lines().next() {
Some(Ok(line)) => password = line,
_ => return Err(format!("No password in file")),
},
Err(e) => return Err(format!("Could not open password file: {}", e)),
},
None => {
password = match rpassword::prompt_password_stdout("Password: ") {
Ok(p) => p,
Err(e) => return Err(format!("{}", e)),
}
}
}
let addr = &format!("ws://127.0.0.1:{}", signerport);
let mut signer = SignerRpc::new(addr, &authfile).map_err(|err| format!("{:?}", err))?;
match id {
Some(id) => sign_transaction(&mut signer, U256::from(id), &password),
None => sign_transactions(&mut signer, password),
}
}