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#![deny(missing_docs)]
mod versions;
use crate::bitcoincore_rpc::jsonrpc::serde_json::Value;
use anyhow::Context;
use bitcoincore_rpc::{Auth, Client, RpcApi};
use log::{debug, error, warn};
use std::ffi::OsStr;
use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
use std::path::PathBuf;
use std::process::{Child, Command, ExitStatus, Stdio};
use std::time::Duration;
use std::{env, fmt, fs, thread};
use tempfile::TempDir;
pub use anyhow;
pub use bitcoincore_rpc;
pub use tempfile;
pub use which;
#[derive(Debug)]
pub struct BitcoinD {
process: Child,
pub client: Client,
work_dir: DataDir,
pub params: ConnectParams,
}
#[derive(Debug)]
pub enum DataDir {
Persistent(PathBuf),
Temporary(TempDir),
}
impl DataDir {
fn path(&self) -> PathBuf {
match self {
Self::Persistent(path) => path.to_owned(),
Self::Temporary(tmp_dir) => tmp_dir.path().to_path_buf(),
}
}
}
#[derive(Debug, Clone)]
pub struct ConnectParams {
pub cookie_file: PathBuf,
pub rpc_socket: SocketAddrV4,
pub p2p_socket: Option<SocketAddrV4>,
}
impl ConnectParams {
fn parse_cookie(content: String) -> anyhow::Result<(Option<String>, Option<String>)> {
let values: Vec<&str> = content.splitn(2, ':').collect();
Ok((Some(values[0].into()), Some(values[1].into())))
}
pub fn get_cookie_values(&self) -> anyhow::Result<(Option<String>, Option<String>)> {
let cookie = std::fs::read_to_string(&self.cookie_file)?;
self::ConnectParams::parse_cookie(cookie)
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum P2P {
No,
Yes,
Connect(SocketAddrV4, bool),
}
pub enum Error {
Io(std::io::Error),
Rpc(bitcoincore_rpc::Error),
NoFeature,
NoEnvVar,
NoBitcoindExecutableFound,
BothFeatureAndEnvVar,
EarlyExit(ExitStatus),
BothDirsSpecified,
RpcUserAndPasswordUsed,
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Error::Io(_) => write!(f, "io::Error"),
Error::Rpc(_) => write!(f, "bitcoin_rpc::Error"),
Error::NoFeature => write!(f, "Called a method requiring a feature to be set, but it's not"),
Error::NoEnvVar => write!(f, "Called a method requiring env var `BITCOIND_EXE` to be set, but it's not"),
Error::NoBitcoindExecutableFound => write!(f, "`bitcoind` executable is required, provide it with one of the following: set env var `BITCOIND_EXE` or use a feature like \"22_0\" or have `bitcoind` executable in the `PATH`"),
Error::BothFeatureAndEnvVar => write!(f, "Called a method requiring env var `BITCOIND_EXE` or a feature to be set, but both are set"),
Error::EarlyExit(e) => write!(f, "The bitcoind process terminated early with exit code {}", e),
Error::BothDirsSpecified => write!(f, "tempdir and staticdir cannot be enabled at same time in configuration options"),
Error::RpcUserAndPasswordUsed => write!(f, "`-rpcuser` and `-rpcpassword` cannot be used, it will be deprecated soon and it's recommended to use `-rpcauth` instead which works alongside with the default cookie authentication")
}
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{:?}", self)
}
}
impl std::error::Error for Error {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match self {
Error::Io(e) => Some(e),
Error::Rpc(e) => Some(e),
_ => None,
}
}
}
const LOCAL_IP: Ipv4Addr = Ipv4Addr::new(127, 0, 0, 1);
const INVALID_ARGS: [&str; 2] = ["-rpcuser", "-rpcpassword"];
#[non_exhaustive]
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct Conf<'a> {
pub args: Vec<&'a str>,
pub view_stdout: bool,
pub p2p: P2P,
pub network: &'a str,
pub tmpdir: Option<PathBuf>,
pub staticdir: Option<PathBuf>,
pub attempts: u8,
}
impl Default for Conf<'_> {
fn default() -> Self {
Conf {
args: vec!["-regtest", "-fallbackfee=0.0001"],
view_stdout: false,
p2p: P2P::No,
network: "regtest",
tmpdir: None,
staticdir: None,
attempts: 3,
}
}
}
impl BitcoinD {
pub fn new<S: AsRef<OsStr>>(exe: S) -> anyhow::Result<BitcoinD> {
BitcoinD::with_conf(exe, &Conf::default())
}
pub fn with_conf<S: AsRef<OsStr>>(exe: S, conf: &Conf) -> anyhow::Result<BitcoinD> {
let tmpdir = conf
.tmpdir
.clone()
.or_else(|| env::var("TEMPDIR_ROOT").map(PathBuf::from).ok());
let work_dir = match (&tmpdir, &conf.staticdir) {
(Some(_), Some(_)) => return Err(Error::BothDirsSpecified.into()),
(Some(tmpdir), None) => DataDir::Temporary(TempDir::new_in(tmpdir)?),
(None, Some(workdir)) => {
fs::create_dir_all(workdir)?;
DataDir::Persistent(workdir.to_owned())
}
(None, None) => DataDir::Temporary(TempDir::new()?),
};
let work_dir_path = work_dir.path();
debug!("work_dir: {:?}", work_dir_path);
let cookie_file = work_dir_path.join(conf.network).join(".cookie");
let rpc_port = get_available_port()?;
let rpc_socket = SocketAddrV4::new(LOCAL_IP, rpc_port);
let rpc_url = format!("http://{}", rpc_socket);
let (p2p_args, p2p_socket) = match conf.p2p {
P2P::No => (vec!["-listen=0".to_string()], None),
P2P::Yes => {
let p2p_port = get_available_port()?;
let p2p_socket = SocketAddrV4::new(LOCAL_IP, p2p_port);
let p2p_arg = format!("-port={}", p2p_port);
let args = vec![p2p_arg];
(args, Some(p2p_socket))
}
P2P::Connect(other_node_url, listen) => {
let p2p_port = get_available_port()?;
let p2p_socket = SocketAddrV4::new(LOCAL_IP, p2p_port);
let p2p_arg = format!("-port={}", p2p_port);
let connect = format!("-connect={}", other_node_url);
let mut args = vec![p2p_arg, connect];
if listen {
args.push("-listen=1".to_string())
}
(args, Some(p2p_socket))
}
};
let stdout = if conf.view_stdout {
Stdio::inherit()
} else {
Stdio::null()
};
let datadir_arg = format!("-datadir={}", work_dir_path.display());
let rpc_arg = format!("-rpcport={}", rpc_port);
let default_args = [&datadir_arg, &rpc_arg];
let conf_args = validate_args(conf.args.clone())?;
debug!(
"launching {:?} with args: {:?} {:?} AND custom args: {:?}",
exe.as_ref(),
default_args,
p2p_args,
conf_args
);
let mut process = Command::new(exe.as_ref())
.args(&default_args)
.args(&p2p_args)
.args(&conf_args)
.stdout(stdout)
.spawn()
.with_context(|| format!("Error while executing {:?}", exe.as_ref()))?;
let node_url_default = format!("{}/wallet/default", rpc_url);
let mut i = 0;
let client = loop {
if let Some(status) = process.try_wait()? {
if conf.attempts > 0 {
warn!("early exit with: {:?}. Trying to launch again ({} attempts remaining), maybe some other process used our available port", status, conf.attempts);
let mut conf = conf.clone();
conf.attempts -= 1;
return Self::with_conf(exe, &conf)
.with_context(|| format!("Remaining attempts {}", conf.attempts));
} else {
error!("early exit with: {:?}", status);
return Err(Error::EarlyExit(status).into());
}
}
thread::sleep(Duration::from_millis(100));
assert!(process.stderr.is_none());
let client_result = Client::new(&rpc_url, Auth::CookieFile(cookie_file.clone()));
if let Ok(client_base) = client_result {
if client_base.call::<Value>("getblockchaininfo", &[]).is_ok() {
if client_base
.create_wallet("default", None, None, None, None)
.is_err()
{
client_base.load_wallet("default")?;
}
break Client::new(&node_url_default, Auth::CookieFile(cookie_file.clone()))?;
}
}
debug!(
"bitcoin client for process {} not ready ({})",
process.id(),
i
);
i += 1;
};
Ok(BitcoinD {
process,
client,
work_dir,
params: ConnectParams {
cookie_file,
rpc_socket,
p2p_socket,
},
})
}
pub fn rpc_url(&self) -> String {
format!("http://{}", self.params.rpc_socket)
}
#[cfg(not(any(feature = "0_17_1", feature = "0_18_0", feature = "0_18_1")))]
pub fn rpc_url_with_wallet<T: AsRef<str>>(&self, wallet_name: T) -> String {
format!(
"http://{}/wallet/{}",
self.params.rpc_socket,
wallet_name.as_ref()
)
}
pub fn workdir(&self) -> PathBuf {
self.work_dir.path()
}
pub fn p2p_connect(&self, listen: bool) -> Option<P2P> {
self.params.p2p_socket.map(|s| P2P::Connect(s, listen))
}
pub fn stop(&mut self) -> anyhow::Result<ExitStatus> {
self.client.stop()?;
Ok(self.process.wait()?)
}
#[cfg(not(any(feature = "0_17_1", feature = "0_18_0", feature = "0_18_1")))]
pub fn create_wallet<T: AsRef<str>>(&self, wallet: T) -> anyhow::Result<Client> {
let _ = self
.client
.create_wallet(wallet.as_ref(), None, None, None, None)?;
Ok(Client::new(
&self.rpc_url_with_wallet(wallet),
Auth::CookieFile(self.params.cookie_file.clone()),
)?)
}
}
impl Drop for BitcoinD {
fn drop(&mut self) {
if let DataDir::Persistent(_) = self.work_dir {
let _ = self.stop();
}
let _ = self.process.kill();
}
}
pub fn get_available_port() -> anyhow::Result<u16> {
let t = TcpListener::bind(("127.0.0.1", 0))?; Ok(t.local_addr().map(|s| s.port())?)
}
impl From<std::io::Error> for Error {
fn from(e: std::io::Error) -> Self {
Error::Io(e)
}
}
impl From<bitcoincore_rpc::Error> for Error {
fn from(e: bitcoincore_rpc::Error) -> Self {
Error::Rpc(e)
}
}
const HAS_FEATURE: bool = cfg!(any(
feature = "23_0",
feature = "22_0",
feature = "0_21_1",
feature = "0_21_0",
feature = "0_20_1",
feature = "0_20_0",
feature = "0_19_1",
feature = "0_19_0_1",
feature = "0_18_1",
feature = "0_18_0",
feature = "0_17_1",
));
pub fn downloaded_exe_path() -> anyhow::Result<String> {
if HAS_FEATURE {
let mut path: PathBuf = env!("OUT_DIR").into();
path.push("bitcoin");
path.push(format!("bitcoin-{}", versions::VERSION));
path.push("bin");
if cfg!(target_os = "windows") {
path.push("bitcoind.exe");
} else {
path.push("bitcoind");
}
Ok(format!("{}", path.display()))
} else {
Err(Error::NoFeature.into())
}
}
pub fn exe_path() -> anyhow::Result<String> {
match (downloaded_exe_path(), std::env::var("BITCOIND_EXE")) {
(Ok(_), Ok(_)) => Err(Error::BothFeatureAndEnvVar.into()),
(Ok(path), Err(_)) => Ok(path),
(Err(_), Ok(path)) => Ok(path),
(Err(_), Err(_)) => which::which("bitcoind")
.map_err(|_| Error::NoBitcoindExecutableFound.into())
.map(|p| p.display().to_string()),
}
}
pub fn validate_args(args: Vec<&str>) -> anyhow::Result<Vec<&str>> {
args.iter().try_for_each(|arg| {
if INVALID_ARGS.iter().any(|x| arg.starts_with(x)) {
return Err(Error::RpcUserAndPasswordUsed);
}
Ok(())
})?;
Ok(args)
}
#[cfg(test)]
mod test {
use crate::bitcoincore_rpc::jsonrpc::serde_json::Value;
use crate::bitcoincore_rpc::{Auth, Client};
use crate::exe_path;
use crate::{get_available_port, BitcoinD, Conf, LOCAL_IP, P2P};
use bitcoincore_rpc::RpcApi;
use std::net::SocketAddrV4;
use tempfile::TempDir;
#[test]
fn test_local_ip() {
assert_eq!("127.0.0.1", format!("{}", LOCAL_IP));
let port = get_available_port().unwrap();
let socket = SocketAddrV4::new(LOCAL_IP, port);
assert_eq!(format!("127.0.0.1:{}", port), format!("{}", socket));
}
#[test]
fn test_bitcoind() {
let exe = init();
let bitcoind = BitcoinD::new(exe).unwrap();
let info = bitcoind.client.get_blockchain_info().unwrap();
assert_eq!(0, info.blocks);
let address = bitcoind.client.get_new_address(None, None).unwrap();
let _ = bitcoind.client.generate_to_address(1, &address).unwrap();
let info = bitcoind.client.get_blockchain_info().unwrap();
assert_eq!(1, info.blocks);
}
#[test]
#[cfg(any(feature = "0_21_0", feature = "0_21_1"))]
fn test_getindexinfo() {
let exe = init();
let mut conf = Conf::default();
conf.args.push("-txindex");
let bitcoind = BitcoinD::with_conf(&exe, &conf).unwrap();
assert!(
bitcoind.client.version().unwrap() >= 210_000,
"getindexinfo requires bitcoin >0.21"
);
let info: std::collections::HashMap<String, bitcoincore_rpc::jsonrpc::serde_json::Value> =
bitcoind.client.call("getindexinfo", &[]).unwrap();
assert!(info.contains_key("txindex"));
assert!(bitcoind.client.version().unwrap() >= 210_000);
}
#[test]
fn test_p2p() {
let exe = init();
let mut conf = Conf::default();
conf.p2p = P2P::Yes;
let bitcoind = BitcoinD::with_conf(&exe, &conf).unwrap();
assert_eq!(peers_connected(&bitcoind.client), 0);
let mut other_conf = Conf::default();
other_conf.p2p = bitcoind.p2p_connect(false).unwrap();
let other_bitcoind = BitcoinD::with_conf(&exe, &other_conf).unwrap();
assert_eq!(peers_connected(&bitcoind.client), 1);
assert_eq!(peers_connected(&other_bitcoind.client), 1);
}
#[test]
fn test_data_persistence() {
let mut conf = Conf::default();
let datadir = TempDir::new().unwrap();
conf.staticdir = Some(datadir.path().to_path_buf());
let bitcoind = BitcoinD::with_conf(exe_path().unwrap(), &conf).unwrap();
let core_addrs = bitcoind.client.get_new_address(None, None).unwrap();
bitcoind
.client
.generate_to_address(101, &core_addrs)
.unwrap();
let wallet_balance_1 = bitcoind.client.get_balance(None, None).unwrap();
let best_block_1 = bitcoind.client.get_best_block_hash().unwrap();
drop(bitcoind);
let bitcoind = BitcoinD::with_conf(exe_path().unwrap(), &conf).unwrap();
let wallet_balance_2 = bitcoind.client.get_balance(None, None).unwrap();
let best_block_2 = bitcoind.client.get_best_block_hash().unwrap();
assert_eq!(best_block_1, best_block_2);
assert_eq!(wallet_balance_1, wallet_balance_2);
}
#[test]
fn test_multi_p2p() {
let _ = env_logger::try_init();
let mut conf_node1 = Conf::default();
conf_node1.p2p = P2P::Yes;
let node1 = BitcoinD::with_conf(exe_path().unwrap(), &conf_node1).unwrap();
let mut conf_node2 = Conf::default();
conf_node2.p2p = node1.p2p_connect(true).unwrap();
let node2 = BitcoinD::with_conf(exe_path().unwrap(), &conf_node2).unwrap();
let mut conf_node3 = Conf::default();
conf_node3.p2p = node2.p2p_connect(false).unwrap();
let node3 = BitcoinD::with_conf(exe_path().unwrap(), &conf_node3).unwrap();
let node1_peers = peers_connected(&node1.client);
let node2_peers = peers_connected(&node2.client);
let node3_peers = peers_connected(&node3.client);
assert!(node1_peers >= 1);
assert!(node2_peers >= 1);
assert_eq!(node3_peers, 1, "listen false but more than 1 peer");
}
#[cfg(not(any(feature = "0_17_1", feature = "0_18_0", feature = "0_18_1")))]
#[test]
fn test_multi_wallet() {
use bitcoincore_rpc::bitcoin::Amount;
let exe = init();
let bitcoind = BitcoinD::new(exe).unwrap();
let alice = bitcoind.create_wallet("alice").unwrap();
let alice_address = alice.get_new_address(None, None).unwrap();
let bob = bitcoind.create_wallet("bob").unwrap();
let bob_address = bob.get_new_address(None, None).unwrap();
bitcoind
.client
.generate_to_address(1, &alice_address)
.unwrap();
bitcoind
.client
.generate_to_address(101, &bob_address)
.unwrap();
assert_eq!(
Amount::from_btc(50.0).unwrap(),
alice.get_balances().unwrap().mine.trusted
);
assert_eq!(
Amount::from_btc(50.0).unwrap(),
bob.get_balances().unwrap().mine.trusted
);
assert_eq!(
Amount::from_btc(5000.0).unwrap(),
bob.get_balances().unwrap().mine.immature
);
let _txid = alice
.send_to_address(
&bob_address,
Amount::from_btc(1.0).unwrap(),
None,
None,
None,
None,
None,
None,
)
.unwrap();
assert!(
alice.get_balances().unwrap().mine.trusted < Amount::from_btc(49.0).unwrap()
&& alice.get_balances().unwrap().mine.trusted > Amount::from_btc(48.9).unwrap()
);
for _ in 0..30 {
if bob.get_balances().unwrap().mine.untrusted_pending.to_sat() > 0 {
break;
}
std::thread::sleep(std::time::Duration::from_millis(100));
}
assert_eq!(
Amount::from_btc(1.0).unwrap(),
bob.get_balances().unwrap().mine.untrusted_pending
);
assert!(
bitcoind.create_wallet("bob").is_err(),
"wallet already exist"
);
}
#[test]
fn test_bitcoind_rpcuser_and_rpcpassword() {
let exe = init();
let mut conf = Conf::default();
conf.args.push("-rpcuser=bitcoind");
conf.args.push("-rpcpassword=bitcoind");
let bitcoind = BitcoinD::with_conf(exe, &conf);
assert!(bitcoind.is_err());
}
#[test]
fn test_bitcoind_rpcauth() {
let exe = init();
let mut conf = Conf::default();
conf.args.push("-rpcauth=bitcoind:cccd5d7fd36e55c1b8576b8077dc1b83$60b5676a09f8518dcb4574838fb86f37700cd690d99bd2fdc2ea2bf2ab80ead6");
let bitcoind = BitcoinD::with_conf(exe, &conf).unwrap();
let client = Client::new(
format!("{}/wallet/default", bitcoind.rpc_url().as_str()).as_str(),
Auth::UserPass("bitcoind".to_string(), "bitcoind".to_string()),
)
.unwrap();
let info = client.get_blockchain_info().unwrap();
assert_eq!(0, info.blocks);
let address = client.get_new_address(None, None).unwrap();
let _ = client.generate_to_address(1, &address).unwrap();
let info = bitcoind.client.get_blockchain_info().unwrap();
assert_eq!(1, info.blocks);
}
#[test]
fn test_get_cookie_user_and_pass() {
let exe = init();
let bitcoind = BitcoinD::new(exe).unwrap();
let user: &str = "bitcoind_user";
let password: &str = "bitcoind_password";
std::fs::write(
&bitcoind.params.cookie_file,
format!("{}:{}", user, password),
)
.unwrap();
let result_values: (Option<String>, Option<String>) =
bitcoind.params.get_cookie_values().unwrap();
assert_eq!(user, result_values.0.unwrap().as_str());
assert_eq!(password, result_values.1.unwrap().as_str());
}
fn peers_connected(client: &Client) -> usize {
let result: Vec<Value> = client.call("getpeerinfo", &[]).unwrap();
result.len()
}
fn init() -> String {
let _ = env_logger::try_init();
exe_path().unwrap()
}
}