feat(rpc) Implement Filecoin.EthProtocolVersion (#4513)

Co-authored-by: David Himmelstrup <david.himmelstrup@chainsafe.io>
Co-authored-by: LeshyBot <114995399+LeshyBot@users.noreply.github.com>
Co-authored-by: github-merge-queue <118344674+github-merge-queue@users.noreply.github.com>

src/rpc/methods/eth.rs

@@ -1722,6 +1722,26 @@ impl RpcMethod<0> for EthMaxPriorityFeePerGas {
     }
 }
 
+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()))
+    }
+}
+
 pub enum EthGetTransactionHashByCid {}
 impl RpcMethod<1> for EthGetTransactionHashByCid {
     const NAME: &'static str = "Filecoin.EthGetTransactionHashByCid";

src/rpc/mod.rs

@@ -82,6 +82,7 @@ macro_rules! for_each_method {
         $callback!(crate::rpc::eth::EthGetMessageCidByTransactionHash);
         $callback!(crate::rpc::eth::EthGetTransactionCount);
         $callback!(crate::rpc::eth::EthMaxPriorityFeePerGas);
+        $callback!(crate::rpc::eth::EthProtocolVersion);
         $callback!(crate::rpc::eth::EthGetTransactionHashByCid);
 
         // gas vertical

src/tool/subcommands/api_cmd.rs

@@ -1144,6 +1144,7 @@ fn eth_tests() -> Vec<RpcTest> {
         ),
         RpcTest::basic(Web3ClientVersion::request(()).unwrap()),
         RpcTest::identity(EthMaxPriorityFeePerGas::request(()).unwrap()),
+        RpcTest::identity(EthProtocolVersion::request(()).unwrap()),
     ]
 }