feat(rpc): add HlBlockPrecompile rpc API

src/main.rs

@@ -12,6 +12,7 @@ use reth_hl::{
     chainspec::{parser::HlChainSpecParser, HlChainSpec},
     node::{
         cli::{Cli, HlNodeArgs},
+        rpc::precompile::{HlBlockPrecompileApiServer, HlBlockPrecompileExt},
         storage::tables::Tables,
         HlNode,
     },
@@ -72,6 +73,10 @@ fn main() -> eyre::Result<()> {
                         info!("eth_getProof is disabled by default");
                     }
 
+                    ctx.modules.merge_configured(
+                        HlBlockPrecompileExt::new(ctx.registry.eth_api().clone()).into_rpc(),
+                    )?;
+
                     Ok(())
                 })
                 .apply(|builder| {

src/node/rpc/mod.rs

@@ -43,6 +43,7 @@ mod block;
 mod call;
 pub mod engine_api;
 mod estimate;
+pub mod precompile;
 mod transaction;
 
 pub trait HlRpcNodeCore: RpcNodeCore<Primitives: NodePrimitives<Block = HlBlock>> {}

src/node/rpc/precompile.rs

@@ -0,0 +1,44 @@
+use jsonrpsee::proc_macros::rpc;
+use jsonrpsee_core::{async_trait, RpcResult};
+use reth_rpc_convert::RpcConvert;
+use reth_rpc_eth_types::EthApiError;
+use tracing::trace;
+
+use crate::node::{
+    rpc::{HlEthApi, HlRpcNodeCore},
+    types::HlExtras,
+};
+
+/// A custom RPC trait for fetching block precompile data.
+#[rpc(server, namespace = "eth")]
+#[async_trait]
+pub trait HlBlockPrecompileApi {
+    /// Fetches precompile data for a given block number.
+    #[method(name = "blockPrecompileData")]
+    async fn block_precompile_data(&self, block_number: u64) -> RpcResult<HlExtras>;
+}
+
+pub struct HlBlockPrecompileExt<N: HlRpcNodeCore, Rpc: RpcConvert> {
+    eth_api: HlEthApi<N, Rpc>,
+}
+
+impl<N: HlRpcNodeCore, Rpc: RpcConvert> HlBlockPrecompileExt<N, Rpc> {
+    /// Creates a new instance of the [`HlBlockPrecompileExt`].
+    pub fn new(eth_api: HlEthApi<N, Rpc>) -> Self {
+        Self { eth_api }
+    }
+}
+
+#[async_trait]
+impl<N, Rpc> HlBlockPrecompileApiServer for HlBlockPrecompileExt<N, Rpc>
+where
+    N: HlRpcNodeCore,
+    Rpc: RpcConvert<Primitives = N::Primitives, Error = EthApiError>,
+{
+    async fn block_precompile_data(&self, block_number: u64) -> RpcResult<HlExtras> {
+        trace!(target: "rpc::eth", block_number, "Serving eth_blockPrecompileData");
+        let hl_extras =
+            self.eth_api.get_hl_extras(block_number).map_err(|e| EthApiError::from(e))?;
+        Ok(hl_extras)
+    }
+}