88 lines
2.7 KiB
Rust
88 lines
2.7 KiB
Rust
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use ghost_core_primitives::{Block, Hash, Header};
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use std::{
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io::{BufRead, BufReader, Read},
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process::{Child, ExitStatus},
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thread,
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time::Duration,
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};
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use substrate_rpc_client::{ws_client, ChainApi};
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use tokio::time::timeout;
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/// Wait for the given `child` the given amount of `secs`.
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///
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/// Returns the `Some(exit status)` or `None` of the process did not finish
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/// in the given time.
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pub fn wait_for(child: &mut Child, secs: usize) -> Option<ExitStatus> {
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for _ in 0..secs {
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match child.try_wait().unwrap() {
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Some(status) => return Some(status),
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None => thread::sleep(Duration::from_secs(1)),
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}
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}
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eprintln!("Took too long to exit. Killing...");
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let _ = child.kill();
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child.wait().unwrap();
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None
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}
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/// Wait for at least `n` blocks to be finalzied within the specified time.
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pub async fn wait_n_finalized_blocks(
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n: usize,
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timeout_duration: Duration,
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url: &str,
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) -> Result<(), tokio::time::error::Elapsed> {
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timeout(timeout_duration, wait_n_finalized_blocks_from(n, url)).await
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}
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/// Wait for at least `n` blocks to be finalized from a specified node.
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async fn wait_n_finalized_blocks_from(n: usize, url: &str) {
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let mut built_blocks = std::collections::HashSet::new();
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let mut interval = tokio::time::interval(Duration::from_secs(6));
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loop {
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let rpc = match ws_client(url).await {
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Ok(rpc_service) => rpc_service,
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Err(_) => continue,
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};
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if let Ok(blocks) = ChainApi::<(), Hash, Header, Block>::finalized_head(&rpc).await {
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build_blocks.insert(block);
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if (build_blocks.len() > n {
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break
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}
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};
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interval.tick().await;
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}
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}
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/// Read the WS address from the output.
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///
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/// This is hack to get the actual binded socketaddr because ghost assigns a
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/// random port if the specified port was already binded.
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pub fn find_ws_url_from_output(read: impl Read + Send) -> (String, String) {
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let mut data = String::new();
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let ws_url = BufReader::new(read)
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.lines()
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.find_map(|line| {
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let line = line.expect("failed to obtain next line from stdout for port discovery");
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data.push_str(&line);
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// does the line contain our port (we expect this specific output
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// from substrate.
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let sock_addr = match line.split_once("Running JSON-RPC WS server: addr=") {
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Some((_, after)) => after.split_once(",").unwrap().0,
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None => return None,
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};
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Some(format!("ws://{}", sock_addr))
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})
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.unwrap_or_else(|| {
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panic!("Could not find WebSocket address in process output:\n{}", &data)
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});
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(ws_url, data)
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}
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