impl a no_std no_alloc Stratum v1 client

.github/workflows/lint.yaml

@@ -24,9 +24,12 @@ jobs:
       # requires a nightly Rust compiler for defining a global allocator and
       # the exception handler.
       #
-      # So, disable it for now.
+      # The stratum-v1 crate won't compile with all features enabled because
+      # if has 2 mutualy exclusive features: defmt and log.
+      #
+      # So, disable them for now.
       - run: cargo check --no-default-features --workspace --exclude foundation-ffi
-      - run: cargo check --all-features
+      - run: cargo check --all-features --workspace --exclude stratum-v1
 
   is-the-code-formatted:
     name: Is the code formatted?
@@ -63,4 +66,4 @@ jobs:
           toolchain: 1.77
       - run: cargo test
       - run: cargo test --no-default-features --workspace --exclude foundation-ffi
-      - run: cargo test --all-features
+      - run: cargo test --all-features --workspace --exclude stratum-v1

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "nixEnvSelector.nixFile": "${workspaceFolder}/shell.nix"
+}

Cargo.toml

@@ -8,6 +8,7 @@ members = [
     "codecs",
     "ffi",
     "firmware",
+    "stratum-v1",
     "test-vectors",
     "ur",
     "urtypes",
@@ -28,17 +29,23 @@ bs58 = "0.5"
 clap = { version = "4", features = ["cargo"] }
 crc = "3"
 criterion = { version = "0.4" }
+defmt = "0.3"
+derive_more = { version = "1.0", default-features = false }
+embedded-io = "0.6"
+embedded-io-async = "0.6"
 faster-hex = { version = "0.9", default-features = false }
 heapless = { version = "0.8", default-features = false }
 itertools = { version = "0.10", default-features = false }
 libfuzzer-sys = "0.4"
+log = { version = "0.4" }
 minicbor = { version = "0.24", features = ["derive"] }
 nom = { version = "7", default-features = false }
 phf = { version = "0.11", features = ["macros"], default-features = false }
 rand_xoshiro = "0.6"
 secp256k1 = { version = "0.29", default-features = false }
 serde = { version = "1.0.156", features = ["derive"], default-features = false }
 serde_json = "1"
+serde-json-core = { version = "0.6.0" }
 uuid = { version = "1", default-features = false }
 
 # The crates in this workspace.

shell.nix

@@ -0,0 +1,40 @@
+{ pkgs ? import <nixpkgs> {} }:
+  let
+    overrides = (builtins.fromTOML (builtins.readFile ./rust-toolchain.toml));
+    libPath = with pkgs; lib.makeLibraryPath [
+      # load external libraries that you need in your rust project here
+    ];
+in
+  pkgs.mkShell rec {
+    buildInputs = with pkgs; [
+      clang
+      # Replace llvmPackages with llvmPackages_X, where X is the latest LLVM version (at the time of writing, 16)
+      llvmPackages.bintools
+      rustup
+    ];
+    RUSTC_VERSION = overrides.toolchain.channel;
+    # https://github.com/rust-lang/rust-bindgen#environment-variables
+    LIBCLANG_PATH = pkgs.lib.makeLibraryPath [ pkgs.llvmPackages_latest.libclang.lib ];
+    shellHook = ''
+      export PATH=$PATH:''${CARGO_HOME:-~/.cargo}/bin
+      export PATH=$PATH:''${RUSTUP_HOME:-~/.rustup}/toolchains/$RUSTC_VERSION-x86_64-unknown-linux-gnu/bin/
+      '';
+    # Add precompiled library to rustc search path
+    RUSTFLAGS = (builtins.map (a: ''-L ${a}/lib'') [
+      # add libraries here (e.g. pkgs.libvmi)
+    ]);
+    LD_LIBRARY_PATH = libPath;
+    # Add glibc, clang, glib, and other headers to bindgen search path
+    BINDGEN_EXTRA_CLANG_ARGS =
+    # Includes normal include path
+    (builtins.map (a: ''-I"${a}/include"'') [
+      # add dev libraries here (e.g. pkgs.libvmi.dev)
+      pkgs.glibc.dev
+    ])
+    # Includes with special directory paths
+    ++ [
+      ''-I"${pkgs.llvmPackages_latest.libclang.lib}/lib/clang/${pkgs.llvmPackages_latest.libclang.version}/include"''
+      ''-I"${pkgs.glib.dev}/include/glib-2.0"''
+      ''-I${pkgs.glib.out}/lib/glib-2.0/include/''
+    ];
+  }

stratum-v1/Cargo.toml

@@ -0,0 +1,44 @@
+# SPDX-FileCopyrightText: © 2024 Foundation Devices, Inc. <[email protected]>
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+[package]
+categories = ["embedded", "no-std"]
+description = """Stratum v1 client.
+
+This provides a `#[no_std]` library to implement a Stratum v1 client."""
+edition = "2021"
+homepage.workspace = true
+license = "GPL-3.0-or-later AND GPL-3.0-only"
+name = "stratum-v1"
+version = "0.1.0"
+
+[dependencies]
+bitcoin_hashes = { workspace = true }
+defmt = { workspace = true, optional = true }
+derive_more = { workspace = true, features = ["from"] }
+embedded-io-async = { workspace = true }
+faster-hex = { version = "0.10", default-features = false }
+heapless = { workspace = true, features = ["serde"] }
+log = { workspace = true, optional = true }
+serde = { workspace = true }
+serde-json-core = { workspace = true, features = ["custom-error-messages"] }
+
+[features]
+defmt-03 = [
+    "dep:defmt",
+    "embedded-io-async/defmt-03",
+    # "faster-hex/defmt-03", # will enable it after faster-hex publish PR#54
+    "heapless/defmt-03",
+    "serde-json-core/defmt",
+]
+
+[dev-dependencies]
+embedded-io = { workspace = true, features = ["std"] }
+env_logger = "0.11"
+inquire = "0.7"
+log = { workspace = true }
+tokio = { version = "1", features = ["full"] }
+
+[[example]]
+name = "stratum-v1-cli"
+path = "examples/tokio-cli.rs"

stratum-v1/examples/tokio-cli.rs

@@ -0,0 +1,238 @@
+// SPDX-FileCopyrightText: © 2024 Foundation Devices, Inc. <[email protected]>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// #![allow(static_mut_refs)]
+
+use stratum_v1::{Client, Extensions, Message, Share, VersionRolling};
+
+use heapless::{String, Vec};
+use inquire::Select;
+use log::error;
+use std::{
+    net::{Ipv4Addr, SocketAddr},
+    str::FromStr,
+    sync::Arc,
+    time::Duration,
+};
+use tokio::{
+    net::TcpStream,
+    sync::{watch, Mutex},
+};
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+
+    let pool =
+        Select::new("Which Pool should be used?", vec!["Public-Pool", "Braiins"]).prompt()?;
+
+    let addr = match pool {
+        "Public-Pool" => SocketAddr::new(Ipv4Addr::new(68, 235, 52, 36).into(), 21496),
+        "Braiins" => SocketAddr::new(Ipv4Addr::new(64, 225, 5, 77).into(), 3333),
+        _ => unreachable!(),
+    };
+
+    let stream = TcpStream::connect(addr).await?;
+
+    let conn = adapter::FromTokio::<TcpStream>::new(stream);
+
+    let mut client = Client::<_, 1480, 512>::new(conn);
+    client.enable_software_rolling(true, false, false);
+
+    let client_tx = Arc::new(Mutex::new(client));
+    let client_rx = Arc::clone(&client_tx);
+
+    let (authorized_tx, mut authorized_rx) = watch::channel(false);
+
+    tokio::spawn(async move {
+        loop {
+            let mut c = client_rx.lock().await;
+            match c.poll_message().await {
+                Ok(msg) => match msg {
+                    Some(Message::Configured) => {
+                        c.send_connect(Some(String::<32>::from_str("demo").unwrap()))
+                            .await
+                            .unwrap();
+                    }
+                    Some(Message::Connected) => {
+                        c.send_authorize(
+                            match pool {
+                                "Public-Pool" => String::<64>::from_str(
+                                    "1HLQGxzAQWnLore3fWHc2W8UP1CgMv1GKQ.miner1",
+                                )
+                                .unwrap(),
+                                "Braiins" => String::<64>::from_str("slush.miner1").unwrap(),
+                                _ => unreachable!(),
+                            },
+                            String::<64>::from_str("x").unwrap(),
+                        )
+                        .await
+                        .unwrap();
+                    }
+                    Some(Message::Authorized) => {
+                        authorized_tx.send(true).unwrap();
+                    }
+                    Some(Message::Share {
+                        accepted: _,
+                        rejected: _,
+                    }) => {
+                        // TODO update the display if any
+                    }
+                    Some(Message::VersionMask(_mask)) => {
+                        // TODO use mask for hardware version rolling is available
+                    }
+                    Some(Message::Difficulty(_diff)) => {
+                        // TODO use diff to filter ASIC reported hits
+                    }
+                    Some(Message::CleanJobs) => {
+                        // TODO clean the job queue and immediately start hashing a new job
+                    }
+                    None => {}
+                },
+                Err(e) => {
+                    error!("Client receive_message error: {:?}", e);
+                }
+            }
+        }
+    });
+    {
+        let mut c = client_tx.lock().await;
+        let exts = Extensions {
+            version_rolling: Some(VersionRolling {
+                mask: Some(0x1fffe000),
+                min_bit_count: Some(10),
+            }),
+            minimum_difficulty: None,
+            subscribe_extranonce: None,
+            info: None,
+        };
+        c.send_configure(exts).await.unwrap();
+    }
+    authorized_rx.changed().await.unwrap();
+    loop {
+        // TODO: use client.roll_job() to get a new job at the rate the hardware need it
+        tokio::time::sleep(Duration::from_millis(5000)).await;
+        {
+            let mut c = client_tx.lock().await;
+            let mut extranonce2 = Vec::new();
+            extranonce2.resize(4, 0).unwrap();
+            extranonce2[3] = 0x01;
+            let fake_share = Share {
+                job_id: String::<64>::from_str("01").unwrap(), // TODO will come from the Job
+                extranonce2,                                   // TODO will come from the Job
+                ntime: 1722789905,                             // TODO will come from the Job
+                nonce: 0,                                      // TODO will come from the ASIC hit
+                version_bits: None, // TODO will come from the ASIC hit if hardware version rolling is enabled
+            };
+            c.send_submit(fake_share).await.unwrap();
+        }
+    }
+}
+
+trait Readable {
+    fn poll_read_ready(
+        &self,
+        cx: &mut core::task::Context<'_>,
+    ) -> core::task::Poll<std::io::Result<()>>;
+}
+
+impl Readable for TcpStream {
+    fn poll_read_ready(
+        &self,
+        cx: &mut core::task::Context<'_>,
+    ) -> core::task::Poll<std::io::Result<()>> {
+        self.poll_read_ready(cx)
+    }
+}
+
+mod adapter {
+    use core::future::poll_fn;
+    use core::pin::Pin;
+    use core::task::Poll;
+
+    /// Adapter from `tokio::io` traits.
+    #[derive(Clone)]
+    pub struct FromTokio<T: ?Sized> {
+        inner: T,
+    }
+
+    impl<T> FromTokio<T> {
+        /// Create a new adapter.
+        pub fn new(inner: T) -> Self {
+            Self { inner }
+        }
+
+        // /// Consume the adapter, returning the inner object.
+        // pub fn into_inner(self) -> T {
+        //     self.inner
+        // }
+    }
+
+    // impl<T: ?Sized> FromTokio<T> {
+    //     /// Borrow the inner object.
+    //     pub fn inner(&self) -> &T {
+    //         &self.inner
+    //     }
+
+    //     /// Mutably borrow the inner object.
+    //     pub fn inner_mut(&mut self) -> &mut T {
+    //         &mut self.inner
+    //     }
+    // }
+
+    impl<T: ?Sized> embedded_io::ErrorType for FromTokio<T> {
+        type Error = std::io::Error;
+    }
+
+    impl<T: tokio::io::AsyncRead + Unpin + ?Sized> embedded_io_async::Read for FromTokio<T> {
+        async fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
+            // The current tokio implementation (https://github.com/tokio-rs/tokio/blob/tokio-1.33.0/tokio/src/io/poll_evented.rs#L165)
+            // does not consider the case of buf.is_empty() as a special case,
+            // which can cause Poll::Pending to be returned at the end of the stream when called with an empty buffer.
+            // This poll will, however, never become ready, as no more bytes will be received.
+            if buf.is_empty() {
+                return Ok(0);
+            }
+
+            poll_fn(|cx| {
+                let mut buf = tokio::io::ReadBuf::new(buf);
+                match Pin::new(&mut self.inner).poll_read(cx, &mut buf) {
+                    Poll::Ready(r) => match r {
+                        Ok(()) => Poll::Ready(Ok(buf.filled().len())),
+                        Err(e) => Poll::Ready(Err(e)),
+                    },
+                    Poll::Pending => Poll::Pending,
+                }
+            })
+            .await
+        }
+    }
+
+    impl<T: super::Readable + Unpin + ?Sized> embedded_io_async::ReadReady for FromTokio<T> {
+        fn read_ready(&mut self) -> Result<bool, Self::Error> {
+            // TODO: This crash at runtime :
+            // Cannot start a runtime from within a runtime. This happens because a function (like `block_on`)
+            // attempted to block the current thread while the thread is being used to drive asynchronous tasks.
+            tokio::runtime::Handle::current().block_on(poll_fn(|cx| {
+                match Pin::new(&mut self.inner).poll_read_ready(cx) {
+                    Poll::Ready(_) => Poll::Ready(Ok(true)),
+                    Poll::Pending => Poll::Ready(Ok(false)),
+                }
+            }))
+        }
+    }
+
+    impl<T: tokio::io::AsyncWrite + Unpin + ?Sized> embedded_io_async::Write for FromTokio<T> {
+        async fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
+            match poll_fn(|cx| Pin::new(&mut self.inner).poll_write(cx, buf)).await {
+                Ok(0) if !buf.is_empty() => Err(std::io::ErrorKind::WriteZero.into()),
+                Ok(n) => Ok(n),
+                Err(e) => Err(e),
+            }
+        }
+
+        async fn flush(&mut self) -> Result<(), Self::Error> {
+            poll_fn(|cx| Pin::new(&mut self.inner).poll_flush(cx)).await
+        }
+    }
+}