feat: add eth2wrap/version

Cargo.toml

@@ -45,6 +45,7 @@ prost-build = "0.14"
 prost-types = "0.14"
 rand = { version = "0.8", features = ["std_rng"] }
 rand_core = "0.6"
+regex = "1.12"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = { version = "1.0" }
 thiserror = "2.0"
@@ -59,7 +60,6 @@ base64 = "0.22"
 sha3 = "0.10"
 k256 = { version = "0.13.4", features = ["ecdsa", "sha256"] }
 criterion = "0.8.0"
-regex = "1.12"
 reqwest = "0.13"
 http = "1.4"
 tempfile = "3.24"

crates/charon/Cargo.toml

@@ -15,6 +15,7 @@ tokio.workspace = true
 tokio-util.workspace = true
 prost.workspace = true
 prost-types.workspace = true
+regex.workspace = true
 thiserror.workspace = true
 tracing.workspace = true
 tracing-subscriber.workspace = true

crates/charon/src/eth2wrap/mod.rs

@@ -0,0 +1,2 @@
+/// Validate Beacon Node versions
+pub mod version;

crates/charon/src/eth2wrap/version.rs

@@ -0,0 +1,155 @@
+use charon_core::version::{self};
+use std::sync::LazyLock;
+use tracing::warn;
+
+type Result<T> = std::result::Result<T, BeaconNodeVersionError>;
+
+#[derive(Debug, PartialEq, Eq, thiserror::Error)]
+enum BeaconNodeVersionError {
+    #[error("Version string has an unexpected format")]
+    InvalidFormat,
+
+    #[error("Unknown beacon node client")]
+    UnknownClient,
+
+    #[error("Beacon node client version is too old")]
+    TooOld {
+        client: version::SemVer,
+        minimum: version::SemVer,
+    },
+}
+
+static MINIMUM_BEACON_NODE_VERSIONS: LazyLock<std::collections::HashMap<&str, version::SemVer>> =
+    LazyLock::new(|| {
+        #[allow(clippy::unwrap_used, reason = "literals should be valid semver")]
+        std::collections::HashMap::from([
+            ("lighthouse", version::SemVer::parse("v8.0.0-rc.0").unwrap()),
+            ("teku", version::SemVer::parse("v25.9.3").unwrap()),
+            ("lodestar", version::SemVer::parse("v1.35.0-rc.1").unwrap()),
+            ("nimbus", version::SemVer::parse("v25.9.2").unwrap()),
+            ("prysm", version::SemVer::parse("v6.1.0").unwrap()),
+            ("grandine", version::SemVer::parse("v2.0.0-rc0").unwrap()),
+        ])
+    });
+
+static VERSION_EXTRACT_REGEX: LazyLock<regex::Regex> = LazyLock::new(|| {
+    regex::Regex::new(r"^([^/]+)/v?([0-9]+\.[0-9]+\.[0-9]+)").expect("invalid regex")
+});
+
+fn check_beacon_node_version_status(bn_version: &str) -> Result<()> {
+    let matches = VERSION_EXTRACT_REGEX
+        .captures(bn_version)
+        .ok_or(BeaconNodeVersionError::InvalidFormat)?;
+
+    if matches.len() != 3 {
+        return Err(BeaconNodeVersionError::InvalidFormat);
+    }
+
+    let client = version::SemVer::parse(format!("v{}", &matches[2]))
+        .map_err(|_| BeaconNodeVersionError::InvalidFormat)?;
+
+    let name = &matches[1];
+    let minimum = MINIMUM_BEACON_NODE_VERSIONS
+        .get(&name.to_lowercase().as_str())
+        .ok_or(BeaconNodeVersionError::UnknownClient)?
+        .clone();
+
+    if client < minimum {
+        return Err(BeaconNodeVersionError::TooOld { client, minimum });
+    }
+
+    Ok(())
+}
+
+/// Checks the version of the beacon node client and logs a warning if the
+/// version is below the minimum or if the client is not recognized.
+pub fn check_beacon_node_version(bn_version: &str) {
+    match check_beacon_node_version_status(bn_version) {
+        Err(BeaconNodeVersionError::InvalidFormat) => {
+            warn!(
+                input = bn_version,
+                "Failed to parse beacon node version string due to unexpected format"
+            );
+        }
+        Err(BeaconNodeVersionError::UnknownClient) => {
+            warn!(
+                client = bn_version,
+                "Unknown beacon node client not in supported client list"
+            );
+        }
+        Err(BeaconNodeVersionError::TooOld { client, minimum }) => {
+            warn!(
+              client_version = %client,
+              minimum_required = %minimum,
+              "Beacon node client version is below the minimum supported version. Please upgrade your beacon node."
+            );
+        }
+        Ok(()) => { /* Do nothing */ }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn check_beacon_node_version_status() {
+        let tc = vec![
+            // Teku
+            (
+                "teku/v25.9.3/linux-x86_64/-eclipseadoptium-openjdk64bitservervm-java-21",
+                Ok(()),
+            ),
+            (
+                "teku/vUNKNOWN+g40561a9/linux-x86_64/-eclipseadoptium-openjdk64bitservervm-java-21",
+                Err(BeaconNodeVersionError::InvalidFormat),
+            ),
+            // Lighthouse
+            ("Lighthouse/v8.0.1-e42406d/x86_64-linux", Ok(())),
+            ("Lighthouse/v8.0.0-54f7bc5/aarch64-linux", Ok(())),
+            // Lodestar
+            ("Lodestar/v1.35.0/8335180", Ok(())),
+            ("Lodestar/v1.36.0/1a34f98", Ok(())),
+            // Nimbus
+            ("Nimbus/v26.4.1-77cfa7-stateofus", Ok(())),
+            ("Nimbus/v26.5.0-d2f233-stateofus", Ok(())),
+            (
+                "Nimbus/v25.9.0-c7e5ca-stateofus",
+                Err(BeaconNodeVersionError::TooOld {
+                    client: version::SemVer::parse("v25.9.0").unwrap(),
+                    minimum: version::SemVer::parse("v25.9.2").unwrap(),
+                }),
+            ),
+            // Prysm
+            (
+                "Prysm/v5.3.2 (linux amd64)",
+                Err(BeaconNodeVersionError::TooOld {
+                    client: version::SemVer::parse("v5.3.2").unwrap(),
+                    minimum: version::SemVer::parse("v6.1.0").unwrap(),
+                }),
+            ),
+            ("Prysm/v6.1.2 (linux amd64)", Ok(())),
+            ("Prysm/v6.2.0 (linux amd64)", Ok(())),
+            // Grandine
+            ("Grandine/2.1.0-29cb5c1/x86_64-linux2025-05-19", Ok(())),
+            // Additional error cases
+            ("", Err(BeaconNodeVersionError::InvalidFormat)),
+            ("justastring", Err(BeaconNodeVersionError::InvalidFormat)),
+            ("/v7.0.0", Err(BeaconNodeVersionError::InvalidFormat)),
+            (
+                "UnknownClient/v7.0.0",
+                Err(BeaconNodeVersionError::UnknownClient),
+            ),
+            ("Lighthouse/", Err(BeaconNodeVersionError::InvalidFormat)),
+            (
+                "Lighthouse/vBAD",
+                Err(BeaconNodeVersionError::InvalidFormat),
+            ),
+        ];
+
+        for (input, expected) in tc {
+            let result = super::check_beacon_node_version_status(input);
+            assert_eq!(result, expected, "input = {input}");
+        }
+    }
+}

crates/charon/src/lib.rs

@@ -16,11 +16,14 @@ pub mod retry;
 /// Deadline
 pub mod deadline;
 
-/// Ethereum EL RPC client management
+/// Ethereum EL RPC client management.
 pub mod eth1wrap;
 
 /// Featureset defines a set of global features and their rollout status.
 pub mod featureset;
 
 /// Obol API client for interacting with the Obol network API.
 pub mod obolapi;
+
+/// Ethereum CL RPC client management.
+pub mod eth2wrap;

flake.nix

@@ -35,6 +35,7 @@
           chmod +x .githooks/* && git config --local core.hooksPath .githooks/
         '';
 
+        RUSTC_BOOTSTRAP = "1";
         LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [ pkgs.openssl ];
         PKG_CONFIG_PATH = "${pkgs.openssl.dev}/lib/pkgconfig";
       };