Introduce threading to validator client

validator_client/src/duties/grpc.rs

@@ -0,0 +1,63 @@
+use super::traits::{BeaconNode, BeaconNodeError};
+use protos::services::{
+    BeaconBlock as GrpcBeaconBlock, ProduceBeaconBlockRequest, PublishBeaconBlockRequest,
+};
+use protos::services_grpc::BeaconBlockServiceClient;
+use ssz::{ssz_encode, Decodable};
+use types::{BeaconBlock, BeaconBlockBody, Hash256, Signature};
+
+impl BeaconNode for BeaconBlockServiceClient {
+    fn produce_beacon_block(&self, slot: u64) -> Result<Option<BeaconBlock>, BeaconNodeError> {
+        let mut req = ProduceBeaconBlockRequest::new();
+        req.set_slot(slot);
+
+        let reply = self
+            .produce_beacon_block(&req)
+            .map_err(|err| BeaconNodeError::RemoteFailure(format!("{:?}", err)))?;
+
+        if reply.has_block() {
+            let block = reply.get_block();
+
+            let (signature, _) = Signature::ssz_decode(block.get_signature(), 0)
+                .map_err(|_| BeaconNodeError::DecodeFailure)?;
+
+            // TODO: this conversion is incomplete; fix it.
+            Ok(Some(BeaconBlock {
+                slot: block.get_slot(),
+                parent_root: Hash256::zero(),
+                state_root: Hash256::zero(),
+                randao_reveal: Hash256::from(block.get_randao_reveal()),
+                candidate_pow_receipt_root: Hash256::zero(),
+                signature,
+                body: BeaconBlockBody {
+                    proposer_slashings: vec![],
+                    casper_slashings: vec![],
+                    attestations: vec![],
+                    deposits: vec![],
+                    exits: vec![],
+                },
+            }))
+        } else {
+            Ok(None)
+        }
+    }
+
+    fn publish_beacon_block(&self, block: BeaconBlock) -> Result<bool, BeaconNodeError> {
+        let mut req = PublishBeaconBlockRequest::new();
+
+        // TODO: this conversion is incomplete; fix it.
+        let mut grpc_block = GrpcBeaconBlock::new();
+        grpc_block.set_slot(block.slot);
+        grpc_block.set_block_root(vec![0]);
+        grpc_block.set_randao_reveal(block.randao_reveal.to_vec());
+        grpc_block.set_signature(ssz_encode(&block.signature));
+
+        req.set_block(grpc_block);
+
+        let reply = self
+            .publish_beacon_block(&req)
+            .map_err(|err| BeaconNodeError::RemoteFailure(format!("{:?}", err)))?;
+
+        Ok(reply.get_success())
+    }
+}