629 lines
20 KiB
Rust
629 lines
20 KiB
Rust
use base64;
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use bitcoin::blockdata::block::{Block, BlockHeader};
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use bitcoin::blockdata::transaction::Transaction;
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use bitcoin::consensus::encode::{deserialize, serialize};
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use bitcoin::network::constants::Network;
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use bitcoin::util::hash::BitcoinHash;
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use bitcoin::util::hash::Sha256dHash;
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use glob;
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use hex;
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use serde_json::{from_str, from_value, Value};
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use std::collections::{HashMap, HashSet};
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use std::io::{BufRead, BufReader, Lines, Write};
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use std::net::{SocketAddr, TcpStream};
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use std::path::PathBuf;
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use std::sync::{Arc, Mutex};
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use std::time::Duration;
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use metrics::{HistogramOpts, HistogramVec, Metrics};
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use signal::Waiter;
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use util::HeaderList;
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use errors::*;
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fn parse_hash(value: &Value) -> Result<Sha256dHash> {
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Ok(Sha256dHash::from_hex(
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value
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.as_str()
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.chain_err(|| format!("non-string value: {}", value))?,
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).chain_err(|| format!("non-hex value: {}", value))?)
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}
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fn header_from_value(value: Value) -> Result<BlockHeader> {
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let header_hex = value
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.as_str()
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.chain_err(|| format!("non-string header: {}", value))?;
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let header_bytes = hex::decode(header_hex).chain_err(|| "non-hex header")?;
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Ok(
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deserialize(&header_bytes)
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.chain_err(|| format!("failed to parse header {}", header_hex))?,
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)
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}
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fn block_from_value(value: Value) -> Result<Block> {
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let block_hex = value.as_str().chain_err(|| "non-string block")?;
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let block_bytes = hex::decode(block_hex).chain_err(|| "non-hex block")?;
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Ok(deserialize(&block_bytes).chain_err(|| format!("failed to parse block {}", block_hex))?)
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}
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fn tx_from_value(value: Value) -> Result<Transaction> {
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let tx_hex = value.as_str().chain_err(|| "non-string tx")?;
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let tx_bytes = hex::decode(tx_hex).chain_err(|| "non-hex tx")?;
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Ok(deserialize(&tx_bytes).chain_err(|| format!("failed to parse tx {}", tx_hex))?)
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}
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/// Parse JSONRPC error code, if exists.
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fn parse_error_code(err: &Value) -> Option<i64> {
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err.as_object()?.get("code")?.as_i64()
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}
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fn parse_jsonrpc_reply(mut reply: Value, method: &str, expected_id: u64) -> Result<Value> {
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if let Some(reply_obj) = reply.as_object_mut() {
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if let Some(err) = reply_obj.get("error") {
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if !err.is_null() {
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if let Some(code) = parse_error_code(&err) {
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match code {
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// RPC_IN_WARMUP -> retry by later reconnection
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-28 => bail!(ErrorKind::Connection(err.to_string())),
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_ => (),
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}
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}
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bail!("{} RPC error: {}", method, err);
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}
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}
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let id = reply_obj
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.get("id")
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.chain_err(|| format!("no id in reply: {:?}", reply_obj))?
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.clone();
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if id != expected_id {
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bail!(
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"wrong {} response id {}, expected {}",
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method,
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id,
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expected_id
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);
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}
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if let Some(result) = reply_obj.get_mut("result") {
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return Ok(result.take());
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}
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bail!("no result in reply: {:?}", reply_obj);
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}
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bail!("non-object reply: {:?}", reply);
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}
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#[derive(Serialize, Deserialize, Debug)]
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pub struct BlockchainInfo {
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pub chain: String,
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pub blocks: u32,
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pub headers: u32,
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pub bestblockhash: String,
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pub pruned: bool,
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pub verificationprogress: f32,
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pub initialblockdownload: bool,
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}
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#[derive(Serialize, Deserialize, Debug)]
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struct NetworkInfo {
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version: u64,
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subversion: String,
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}
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pub struct MempoolEntry {
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fee: u64, // in satoshis
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vsize: u32, // in virtual bytes (= weight/4)
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fee_per_vbyte: f32,
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}
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impl MempoolEntry {
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fn new(fee: u64, vsize: u32) -> MempoolEntry {
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MempoolEntry {
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fee,
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vsize,
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fee_per_vbyte: fee as f32 / vsize as f32,
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}
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}
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pub fn fee_per_vbyte(&self) -> f32 {
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self.fee_per_vbyte
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}
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pub fn fee(&self) -> u64 {
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self.fee
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}
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pub fn vsize(&self) -> u32 {
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self.vsize
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}
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}
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pub trait CookieGetter: Send + Sync {
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fn get(&self) -> Result<Vec<u8>>;
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}
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struct Connection {
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tx: TcpStream,
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rx: Lines<BufReader<TcpStream>>,
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cookie_getter: Arc<CookieGetter>,
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addr: SocketAddr,
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signal: Waiter,
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}
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fn tcp_connect(addr: SocketAddr, signal: &Waiter) -> Result<TcpStream> {
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loop {
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match TcpStream::connect(addr) {
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Ok(conn) => return Ok(conn),
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Err(err) => {
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warn!("failed to connect daemon at {}: {}", addr, err);
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signal.wait(Duration::from_secs(3))?;
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continue;
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}
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}
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}
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}
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impl Connection {
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fn new(
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addr: SocketAddr,
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cookie_getter: Arc<CookieGetter>,
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signal: Waiter,
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) -> Result<Connection> {
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let conn = tcp_connect(addr, &signal)?;
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let reader = BufReader::new(
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conn.try_clone()
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.chain_err(|| format!("failed to clone {:?}", conn))?,
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);
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Ok(Connection {
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tx: conn,
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rx: reader.lines(),
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cookie_getter,
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addr,
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signal,
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})
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}
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fn reconnect(&self) -> Result<Connection> {
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Connection::new(self.addr, self.cookie_getter.clone(), self.signal.clone())
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}
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fn send(&mut self, request: &str) -> Result<()> {
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let cookie = &self.cookie_getter.get()?;
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let msg = format!(
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"POST / HTTP/1.1\nAuthorization: Basic {}\nContent-Length: {}\n\n{}",
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base64::encode(cookie),
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request.len(),
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request,
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);
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self.tx.write_all(msg.as_bytes()).chain_err(|| {
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ErrorKind::Connection("disconnected from daemon while sending".to_owned())
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})
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}
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fn recv(&mut self) -> Result<String> {
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// TODO: use proper HTTP parser.
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let mut in_header = true;
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let mut contents: Option<String> = None;
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let iter = self.rx.by_ref();
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let status = iter
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.next()
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.chain_err(|| {
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ErrorKind::Connection("disconnected from daemon while receiving".to_owned())
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})?.chain_err(|| "failed to read status")?;
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let mut headers = HashMap::new();
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for line in iter {
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let line = line.chain_err(|| ErrorKind::Connection("failed to read".to_owned()))?;
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if line.is_empty() {
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in_header = false; // next line should contain the actual response.
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} else if in_header {
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let parts: Vec<&str> = line.splitn(2, ": ").collect();
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if parts.len() == 2 {
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headers.insert(parts[0].to_owned(), parts[1].to_owned());
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} else {
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warn!("invalid header: {:?}", line);
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}
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} else {
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contents = Some(line);
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break;
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}
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}
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let contents =
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contents.chain_err(|| ErrorKind::Connection("no reply from daemon".to_owned()))?;
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let contents_length: &str = headers
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.get("Content-Length")
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.chain_err(|| format!("Content-Length is missing: {:?}", headers))?;
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let contents_length: usize = contents_length
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.parse()
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.chain_err(|| format!("invalid Content-Length: {:?}", contents_length))?;
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let expected_length = contents_length - 1; // trailing EOL is skipped
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if expected_length != contents.len() {
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bail!(ErrorKind::Connection(format!(
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"expected {} bytes, got {}",
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expected_length,
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contents.len()
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)));
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}
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Ok(if status == "HTTP/1.1 200 OK" {
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contents
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} else if status == "HTTP/1.1 500 Internal Server Error" {
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warn!("HTTP status: {}", status);
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contents // the contents should have a JSONRPC error field
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} else {
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bail!(
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"request failed {:?}: {:?} = {:?}",
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status,
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headers,
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contents
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);
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})
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}
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}
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struct Counter {
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value: Mutex<u64>,
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}
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impl Counter {
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fn new() -> Self {
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Counter {
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value: Mutex::new(0),
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}
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}
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fn next(&self) -> u64 {
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let mut value = self.value.lock().unwrap();
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*value += 1;
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*value
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}
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}
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pub struct Daemon {
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daemon_dir: PathBuf,
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network: Network,
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conn: Mutex<Connection>,
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message_id: Counter, // for monotonic JSONRPC 'id'
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signal: Waiter,
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// monitoring
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latency: HistogramVec,
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size: HistogramVec,
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}
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impl Daemon {
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pub fn new(
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daemon_dir: &PathBuf,
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daemon_rpc_addr: SocketAddr,
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cookie_getter: Arc<CookieGetter>,
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network: Network,
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signal: Waiter,
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metrics: &Metrics,
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) -> Result<Daemon> {
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let daemon = Daemon {
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daemon_dir: daemon_dir.clone(),
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network,
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conn: Mutex::new(Connection::new(
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daemon_rpc_addr,
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cookie_getter,
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signal.clone(),
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)?),
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message_id: Counter::new(),
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signal: signal.clone(),
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latency: metrics.histogram_vec(
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HistogramOpts::new("daemon_rpc", "Bitcoind RPC latency (in seconds)"),
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&["method"],
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),
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size: metrics.histogram_vec(
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HistogramOpts::new("daemon_bytes", "Bitcoind RPC size (in bytes)"),
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&["method", "dir"],
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),
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};
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let network_info = daemon.getnetworkinfo()?;
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info!("{:?}", network_info);
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if network_info.version < 00_16_00_00 {
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bail!(
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"{} is not supported - please use bitcoind 0.16+",
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network_info.subversion,
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)
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}
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let blockchain_info = daemon.getblockchaininfo()?;
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info!("{:?}", blockchain_info);
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if blockchain_info.pruned == true {
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bail!("pruned node is not supported (use '-prune=0' bitcoind flag)".to_owned())
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}
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loop {
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if daemon.getblockchaininfo()?.initialblockdownload == false {
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break;
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}
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warn!("wait until bitcoind is synced (i.e. initialblockdownload = false)");
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signal.wait(Duration::from_secs(3))?;
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}
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Ok(daemon)
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}
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pub fn reconnect(&self) -> Result<Daemon> {
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Ok(Daemon {
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daemon_dir: self.daemon_dir.clone(),
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network: self.network,
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conn: Mutex::new(self.conn.lock().unwrap().reconnect()?),
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message_id: Counter::new(),
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signal: self.signal.clone(),
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latency: self.latency.clone(),
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size: self.size.clone(),
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})
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}
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pub fn list_blk_files(&self) -> Result<Vec<PathBuf>> {
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let mut path = self.daemon_dir.clone();
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path.push("blocks");
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path.push("blk*.dat");
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info!("listing block files at {:?}", path);
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let mut paths: Vec<PathBuf> = glob::glob(path.to_str().unwrap())
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.chain_err(|| "failed to list blk*.dat files")?
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.map(|res| res.unwrap())
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.collect();
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paths.sort();
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Ok(paths)
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}
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pub fn magic(&self) -> u32 {
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self.network.magic()
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}
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fn call_jsonrpc(&self, method: &str, request: &Value) -> Result<Value> {
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let mut conn = self.conn.lock().unwrap();
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let timer = self.latency.with_label_values(&[method]).start_timer();
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let request = request.to_string();
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conn.send(&request)?;
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self.size
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.with_label_values(&[method, "send"])
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.observe(request.len() as f64);
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let response = conn.recv()?;
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let result: Value = from_str(&response).chain_err(|| "invalid JSON")?;
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timer.observe_duration();
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self.size
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.with_label_values(&[method, "recv"])
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.observe(response.len() as f64);
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Ok(result)
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}
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fn handle_request_batch(&self, method: &str, params_list: &[Value]) -> Result<Vec<Value>> {
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let id = self.message_id.next();
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let reqs = params_list
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.iter()
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.map(|params| json!({"method": method, "params": params, "id": id}))
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.collect();
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let mut results = vec![];
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let mut replies = self.call_jsonrpc(method, &reqs)?;
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if let Some(replies_vec) = replies.as_array_mut() {
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for reply in replies_vec {
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results.push(parse_jsonrpc_reply(reply.take(), method, id)?)
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}
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return Ok(results);
|
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}
|
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bail!("non-array replies: {:?}", replies);
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}
|
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|
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fn retry_request_batch(&self, method: &str, params_list: &[Value]) -> Result<Vec<Value>> {
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loop {
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match self.handle_request_batch(method, params_list) {
|
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Err(Error(ErrorKind::Connection(msg), _)) => {
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warn!("reconnecting to bitcoind: {}", msg);
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self.signal.wait(Duration::from_secs(3))?;
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let mut conn = self.conn.lock().unwrap();
|
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*conn = conn.reconnect()?;
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continue;
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}
|
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result => return result,
|
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}
|
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}
|
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}
|
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|
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fn request(&self, method: &str, params: Value) -> Result<Value> {
|
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let mut values = self.retry_request_batch(method, &[params])?;
|
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assert_eq!(values.len(), 1);
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Ok(values.remove(0))
|
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}
|
|
|
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fn requests(&self, method: &str, params_list: &[Value]) -> Result<Vec<Value>> {
|
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self.retry_request_batch(method, params_list)
|
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}
|
|
|
|
// bitcoind JSONRPC API:
|
|
|
|
pub fn getblockchaininfo(&self) -> Result<BlockchainInfo> {
|
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let info: Value = self.request("getblockchaininfo", json!([]))?;
|
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Ok(from_value(info).chain_err(|| "invalid blockchain info")?)
|
|
}
|
|
|
|
fn getnetworkinfo(&self) -> Result<NetworkInfo> {
|
|
let info: Value = self.request("getnetworkinfo", json!([]))?;
|
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Ok(from_value(info).chain_err(|| "invalid network info")?)
|
|
}
|
|
|
|
pub fn getbestblockhash(&self) -> Result<Sha256dHash> {
|
|
parse_hash(&self.request("getbestblockhash", json!([]))?).chain_err(|| "invalid blockhash")
|
|
}
|
|
|
|
pub fn getblockheader(&self, blockhash: &Sha256dHash) -> Result<BlockHeader> {
|
|
header_from_value(self.request(
|
|
"getblockheader",
|
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json!([blockhash.be_hex_string(), /*verbose=*/ false]),
|
|
)?)
|
|
}
|
|
|
|
pub fn getblockheaders(&self, heights: &[usize]) -> Result<Vec<BlockHeader>> {
|
|
let heights: Vec<Value> = heights.iter().map(|height| json!([height])).collect();
|
|
let params_list: Vec<Value> = self
|
|
.requests("getblockhash", &heights)?
|
|
.into_iter()
|
|
.map(|hash| json!([hash, /*verbose=*/ false]))
|
|
.collect();
|
|
let mut result = vec![];
|
|
for h in self.requests("getblockheader", ¶ms_list)? {
|
|
result.push(header_from_value(h)?);
|
|
}
|
|
Ok(result)
|
|
}
|
|
|
|
pub fn getblock(&self, blockhash: &Sha256dHash) -> Result<Block> {
|
|
let block = block_from_value(self.request(
|
|
"getblock",
|
|
json!([blockhash.be_hex_string(), /*verbose=*/ false]),
|
|
)?)?;
|
|
assert_eq!(block.bitcoin_hash(), *blockhash);
|
|
Ok(block)
|
|
}
|
|
|
|
pub fn getblocks(&self, blockhashes: &[Sha256dHash]) -> Result<Vec<Block>> {
|
|
let params_list: Vec<Value> = blockhashes
|
|
.iter()
|
|
.map(|hash| json!([hash.be_hex_string(), /*verbose=*/ false]))
|
|
.collect();
|
|
let values = self.requests("getblock", ¶ms_list)?;
|
|
let mut blocks = vec![];
|
|
for value in values {
|
|
blocks.push(block_from_value(value)?);
|
|
}
|
|
Ok(blocks)
|
|
}
|
|
|
|
pub fn gettransaction(
|
|
&self,
|
|
txhash: &Sha256dHash,
|
|
blockhash: Option<Sha256dHash>,
|
|
) -> Result<Transaction> {
|
|
let mut args = json!([txhash.be_hex_string(), /*verbose=*/ false]);
|
|
if let Some(blockhash) = blockhash {
|
|
args.as_array_mut()
|
|
.unwrap()
|
|
.push(json!(blockhash.be_hex_string()));
|
|
}
|
|
tx_from_value(self.request("getrawtransaction", args)?)
|
|
}
|
|
|
|
pub fn gettransaction_raw(
|
|
&self,
|
|
txhash: &Sha256dHash,
|
|
blockhash: Option<Sha256dHash>,
|
|
verbose: bool,
|
|
) -> Result<Value> {
|
|
let mut args = json!([txhash.be_hex_string(), verbose]);
|
|
if let Some(blockhash) = blockhash {
|
|
args.as_array_mut()
|
|
.unwrap()
|
|
.push(json!(blockhash.be_hex_string()));
|
|
}
|
|
Ok(self.request("getrawtransaction", args)?)
|
|
}
|
|
|
|
pub fn gettransactions(&self, txhashes: &[&Sha256dHash]) -> Result<Vec<Transaction>> {
|
|
let params_list: Vec<Value> = txhashes
|
|
.iter()
|
|
.map(|txhash| json!([txhash.be_hex_string(), /*verbose=*/ false]))
|
|
.collect();
|
|
|
|
let values = self.requests("getrawtransaction", ¶ms_list)?;
|
|
let mut txs = vec![];
|
|
for value in values {
|
|
txs.push(tx_from_value(value)?);
|
|
}
|
|
assert_eq!(txhashes.len(), txs.len());
|
|
Ok(txs)
|
|
}
|
|
|
|
pub fn getmempooltxids(&self) -> Result<HashSet<Sha256dHash>> {
|
|
let txids: Value = self.request("getrawmempool", json!([/*verbose=*/ false]))?;
|
|
let mut result = HashSet::new();
|
|
for value in txids.as_array().chain_err(|| "non-array result")? {
|
|
result.insert(parse_hash(&value).chain_err(|| "invalid txid")?);
|
|
}
|
|
Ok(result)
|
|
}
|
|
|
|
pub fn getmempoolentry(&self, txid: &Sha256dHash) -> Result<MempoolEntry> {
|
|
let entry = self.request("getmempoolentry", json!([txid.be_hex_string()]))?;
|
|
let fee = (entry
|
|
.get("fee")
|
|
.chain_err(|| "missing fee")?
|
|
.as_f64()
|
|
.chain_err(|| "non-float fee")?
|
|
* 100_000_000f64) as u64;
|
|
let vsize = entry
|
|
.get("size")
|
|
.chain_err(|| "missing size")?
|
|
.as_u64()
|
|
.chain_err(|| "non-integer size")? as u32;
|
|
Ok(MempoolEntry::new(fee, vsize))
|
|
}
|
|
|
|
pub fn broadcast(&self, tx: &Transaction) -> Result<Sha256dHash> {
|
|
let tx = hex::encode(serialize(tx));
|
|
let txid = self.request("sendrawtransaction", json!([tx]))?;
|
|
Ok(
|
|
Sha256dHash::from_hex(txid.as_str().chain_err(|| "non-string txid")?)
|
|
.chain_err(|| "failed to parse txid")?,
|
|
)
|
|
}
|
|
|
|
fn get_all_headers(&self, tip: &Sha256dHash) -> Result<Vec<BlockHeader>> {
|
|
let info: Value = self.request("getblockheader", json!([tip.be_hex_string()]))?;
|
|
let tip_height = info
|
|
.get("height")
|
|
.expect("missing height")
|
|
.as_u64()
|
|
.expect("non-numeric height") as usize;
|
|
let all_heights: Vec<usize> = (0..tip_height + 1).collect();
|
|
let chunk_size = 100_000;
|
|
let mut result = vec![];
|
|
let null_hash = Sha256dHash::default();
|
|
for heights in all_heights.chunks(chunk_size) {
|
|
trace!("downloading {} block headers", heights.len());
|
|
let mut headers = self.getblockheaders(&heights)?;
|
|
assert!(headers.len() == heights.len());
|
|
result.append(&mut headers);
|
|
}
|
|
|
|
let mut blockhash = null_hash;
|
|
for header in &result {
|
|
assert_eq!(header.prev_blockhash, blockhash);
|
|
blockhash = header.bitcoin_hash();
|
|
}
|
|
assert_eq!(blockhash, *tip);
|
|
Ok(result)
|
|
}
|
|
|
|
// Returns a list of BlockHeaders in ascending height (i.e. the tip is last).
|
|
pub fn get_new_headers(
|
|
&self,
|
|
indexed_headers: &HeaderList,
|
|
bestblockhash: &Sha256dHash,
|
|
) -> Result<Vec<BlockHeader>> {
|
|
// Iterate back over headers until known blockash is found:
|
|
if indexed_headers.len() == 0 {
|
|
return self.get_all_headers(bestblockhash);
|
|
}
|
|
debug!(
|
|
"downloading new block headers ({} already indexed) from {}",
|
|
indexed_headers.len(),
|
|
bestblockhash,
|
|
);
|
|
let mut new_headers = vec![];
|
|
let null_hash = Sha256dHash::default();
|
|
let mut blockhash = *bestblockhash;
|
|
while blockhash != null_hash {
|
|
if indexed_headers.header_by_blockhash(&blockhash).is_some() {
|
|
break;
|
|
}
|
|
let header = self
|
|
.getblockheader(&blockhash)
|
|
.chain_err(|| format!("failed to get {} header", blockhash))?;
|
|
new_headers.push(header);
|
|
blockhash = header.prev_blockhash;
|
|
}
|
|
trace!("downloaded {} block headers", new_headers.len());
|
|
new_headers.reverse(); // so the tip is the last vector entry
|
|
Ok(new_headers)
|
|
}
|
|
}
|