kona-preimage 0.0.3

Bindings and types for interacting with the PreimageOracle ABI
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

//! Test utilities for the `kona-preimage` crate.

use anyhow::{anyhow, Result};
use os_pipe::{PipeReader, PipeWriter};

/// A bidirectional pipe, with a client and host end.
#[derive(Debug)]
pub(crate) struct BidirectionalPipe {
    pub(crate) client: Pipe,
    pub(crate) host: Pipe,
}

/// A single-direction pipe, with a read and write end.
#[derive(Debug)]
pub(crate) struct Pipe {
    pub(crate) read: PipeReader,
    pub(crate) write: PipeWriter,
}

/// Creates a [BidirectionalPipe] instance.
pub(crate) fn bidirectional_pipe() -> Result<BidirectionalPipe> {
    let (ar, bw) = os_pipe::pipe().map_err(|e| anyhow!("Failed to create pipe: {e}"))?;
    let (br, aw) = os_pipe::pipe().map_err(|e| anyhow!("Failed to create pipe: {e}"))?;

    Ok(BidirectionalPipe {
        client: Pipe { read: ar, write: aw },
        host: Pipe { read: br, write: bw },
    })
}