feat(rpc) Implement Filecoin.EthProtocolVersion

src/rpc/methods/eth.rs

@@ -1701,6 +1701,26 @@ impl RpcMethod<2> for EthGetTransactionCount {
     }
 }
 
+pub enum EthProtocolVersion {}
+impl RpcMethod<0> for EthProtocolVersion {
+    const NAME: &'static str = "Filecoin.EthProtocolVersion";
+    const PARAM_NAMES: [&'static str; 0] = [];
+    const API_PATHS: ApiPaths = ApiPaths::V1;
+    const PERMISSION: Permission = Permission::Read;
+
+    type Params = ();
+    type Ok = Uint64;
+
+    async fn handle(
+        ctx: Ctx<impl Blockstore + Send + Sync + 'static>,
+        (): Self::Params,
+    ) -> Result<Self::Ok, ServerError> {
+        let epoch = ctx.chain_store.heaviest_tipset().epoch();
+        let version = u32::from(ctx.state_manager.get_network_version(epoch).0);
+        Ok(Uint64(version.into()))
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;

src/rpc/mod.rs

@@ -81,6 +81,7 @@ macro_rules! for_each_method {
         $callback!(crate::rpc::eth::EthGetBlockTransactionCountByNumber);
         $callback!(crate::rpc::eth::EthGetMessageCidByTransactionHash);
         $callback!(crate::rpc::eth::EthGetTransactionCount);
+        $callback!(crate::rpc::eth::EthProtocolVersion);
 
         // gas vertical
         $callback!(crate::rpc::gas::GasEstimateGasLimit);

src/tool/subcommands/api_cmd.rs

@@ -1133,6 +1133,7 @@ fn eth_tests() -> Vec<RpcTest> {
             .unwrap(),
         ),
         RpcTest::basic(Web3ClientVersion::request(()).unwrap()),
+        RpcTest::identity(EthProtocolVersion::request(()).unwrap()),
     ]
 }