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#![deny(missing_docs)]
use crate::bitcoincore_rpc::jsonrpc::serde_json::Value;
use bitcoincore_rpc::{Auth, Client, RpcApi};
use log::debug;
use std::ffi::OsStr;
use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
use std::path::PathBuf;
use std::process::{Child, Command, ExitStatus, Stdio};
use std::thread;
use std::time::Duration;
use tempfile::TempDir;
pub extern crate bitcoincore_rpc;
pub extern crate tempfile;
pub struct BitcoinD {
process: Child,
pub client: Client,
_work_dir: TempDir,
pub params: ConnectParams,
}
#[derive(Debug, Clone)]
pub struct ConnectParams {
pub datadir: PathBuf,
pub cookie_file: PathBuf,
pub rpc_socket: SocketAddrV4,
pub p2p_socket: Option<SocketAddrV4>,
}
pub enum P2P {
No,
Yes,
Connect(SocketAddrV4),
}
#[derive(Debug)]
pub enum Error {
Io(std::io::Error),
Rpc(bitcoincore_rpc::Error),
}
const LOCAL_IP: Ipv4Addr = Ipv4Addr::new(127, 0, 0, 1);
pub struct Conf<'a> {
pub args: Vec<&'a str>,
pub view_stdout: bool,
pub p2p: P2P,
pub network: &'a str,
}
impl Default for Conf<'_> {
fn default() -> Self {
Conf {
args: vec!["-regtest", "-fallbackfee=0.0001"],
view_stdout: false,
p2p: P2P::No,
network: "regtest",
}
}
}
impl BitcoinD {
pub fn new<S: AsRef<OsStr>>(exe: S) -> Result<BitcoinD, Error> {
BitcoinD::with_conf(exe, &Conf::default())
}
pub fn with_conf<S: AsRef<OsStr>>(exe: S, conf: &Conf) -> Result<BitcoinD, Error> {
let _work_dir = TempDir::new()?;
let datadir = _work_dir.path().to_path_buf();
let cookie_file = datadir.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) => {
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 args = vec![p2p_arg, connect];
(args, Some(p2p_socket))
}
};
let stdout = if conf.view_stdout {
Stdio::inherit()
} else {
Stdio::null()
};
let datadir_arg = format!("-datadir={}", datadir.display());
let rpc_arg = format!("-rpcport={}", rpc_port);
let default_args = [&datadir_arg, &rpc_arg];
debug!(
"launching {:?} with args: {:?} {:?} AND custom args",
exe.as_ref(),
default_args,
p2p_args
);
let process = Command::new(exe)
.args(&default_args)
.args(&p2p_args)
.args(&conf.args)
.stdout(stdout)
.spawn()?;
let node_url_default = format!("{}/wallet/default", rpc_url);
let client = loop {
thread::sleep(Duration::from_millis(500));
assert!(process.stderr.is_none());
let client_result = Client::new(rpc_url.clone(), Auth::CookieFile(cookie_file.clone()));
if let Ok(client_base) = client_result {
if client_base.call::<Value>("getblockchaininfo", &[]).is_ok() {
client_base
.create_wallet("default", None, None, None, None)
.unwrap();
break Client::new(node_url_default, Auth::CookieFile(cookie_file.clone()))
.unwrap();
}
}
};
Ok(BitcoinD {
process,
client,
_work_dir,
params: ConnectParams {
datadir,
cookie_file,
rpc_socket,
p2p_socket,
},
})
}
pub fn rpc_url(&self) -> String {
format!("http://{}", self.params.rpc_socket)
}
pub fn p2p_connect(&self) -> Option<P2P> {
self.params.p2p_socket.map(P2P::Connect)
}
pub fn stop(&mut self) -> Result<ExitStatus, Error> {
self.client.stop()?;
Ok(self.process.wait()?)
}
}
impl Drop for BitcoinD {
fn drop(&mut self) {
let _ = self.process.kill();
}
}
pub fn get_available_port() -> Result<u16, Error> {
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)
}
}
#[cfg(test)]
mod test {
use crate::{get_available_port, BitcoinD, Conf, LOCAL_IP, P2P};
use bitcoincore_rpc::jsonrpc::serde_json::Value;
use bitcoincore_rpc::RpcApi;
use std::collections::HashMap;
use std::env;
use std::net::SocketAddrV4;
#[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_default() {
let conf = Conf {
p2p: P2P::Yes,
..Default::default()
};
assert_eq!("regtest", conf.network);
}
#[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]
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: HashMap<String, Value> = bitcoind.client.call("getindexinfo", &[]).unwrap();
assert!(info.contains_key("txindex"));
assert_eq!(bitcoind.client.version().unwrap(), 210_000);
}
#[test]
fn test_p2p() {
let exe = init();
let conf = Conf {
p2p: P2P::Yes,
..Default::default()
};
let bitcoind = BitcoinD::with_conf(&exe, &conf).unwrap();
assert_eq!(bitcoind.client.get_peer_info().unwrap().len(), 0);
let other_conf = Conf {
p2p: bitcoind.p2p_connect().unwrap(),
..Default::default()
};
let other_bitcoind = BitcoinD::with_conf(&exe, &other_conf).unwrap();
assert_eq!(bitcoind.client.get_peer_info().unwrap().len(), 1);
assert_eq!(other_bitcoind.client.get_peer_info().unwrap().len(), 1);
}
fn init() -> String {
let _ = env_logger::try_init();
env::var("BITCOIND_EXE").expect("BITCOIND_EXE env var must be set")
}
}