Implement GetDepositContract in the config API

beacon-chain/rpc/beaconv1/BUILD.bazel

@@ -32,11 +32,13 @@ go_library(
         "//proto/beacon/p2p/v1:go_default_library",
         "//proto/migration:go_default_library",
         "//shared/bytesutil:go_default_library",
+        "//shared/params:go_default_library",
         "@com_github_gogo_protobuf//types:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_prysmaticlabs_ethereumapis//eth/v1:go_default_library",
         "@com_github_prysmaticlabs_ethereumapis//eth/v1alpha1:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
+        "@io_opencensus_go//trace:go_default_library",
         "@org_golang_google_grpc//codes:go_default_library",
         "@org_golang_google_grpc//status:go_default_library",
     ],
@@ -46,6 +48,7 @@ go_test(
     name = "go_default_test",
     srcs = [
         "blocks_test.go",
+        "config_test.go",
         "server_test.go",
     ],
     embed = [":go_default_library"],
@@ -62,6 +65,7 @@ go_test(
         "//shared/testutil:go_default_library",
         "//shared/testutil/assert:go_default_library",
         "//shared/testutil/require:go_default_library",
+        "@com_github_gogo_protobuf//types:go_default_library",
         "@com_github_prysmaticlabs_ethereumapis//eth/v1:go_default_library",
         "@com_github_prysmaticlabs_ethereumapis//eth/v1alpha1:go_default_library",
     ],

beacon-chain/rpc/beaconv1/config.go

@@ -6,6 +6,8 @@ import (
 
 	ptypes "github.com/gogo/protobuf/types"
 	ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1"
+	"github.com/prysmaticlabs/prysm/shared/params"
+	"go.opencensus.io/trace"
 )
 
 // GetForkSchedule retrieve all scheduled upcoming forks this node is aware of.
@@ -23,5 +25,13 @@ func (bs *Server) GetSpec(ctx context.Context, req *ptypes.Empty) (*ethpb.SpecRe
 
 // GetDepositContract retrieves deposit contract address and genesis fork version.
 func (bs *Server) GetDepositContract(ctx context.Context, req *ptypes.Empty) (*ethpb.DepositContractResponse, error) {
-	return nil, errors.New("unimplemented")
+	ctx, span := trace.StartSpan(ctx, "beaconv1.GetDepositContract")
+	defer span.End()
+
+	return &ethpb.DepositContractResponse{
+		Data: &ethpb.DepositContract{
+			ChainId: params.BeaconConfig().DepositChainID,
+			Address: params.BeaconConfig().DepositContractAddress,
+		},
+	}, nil
 }

beacon-chain/rpc/beaconv1/config_test.go

@@ -0,0 +1,28 @@
+package beaconv1
+
+import (
+	"context"
+	"testing"
+
+	ptypes "github.com/gogo/protobuf/types"
+	"github.com/prysmaticlabs/prysm/shared/params"
+	"github.com/prysmaticlabs/prysm/shared/testutil/assert"
+	"github.com/prysmaticlabs/prysm/shared/testutil/require"
+)
+
+func TestGetDepositContract(t *testing.T) {
+	const chainId = 99
+	const address = "0x0000000000000000000000000000000000000009"
+	params.SetupTestConfigCleanup(t)
+	config := params.BeaconConfig()
+	config.DepositChainID = chainId
+
+	config.DepositContractAddress = address
+	params.OverrideBeaconConfig(config)
+
+	s := Server{}
+	resp, err := s.GetDepositContract(context.Background(), &ptypes.Empty{})
+	require.NoError(t, err)
+	assert.Equal(t, uint64(chainId), resp.Data.ChainId)
+	assert.Equal(t, address, resp.Data.Address)
+}