go/consensus/api: Add Registry/Staking/Scheduler to ClientBackend

This makes it more convenient to use the consensus client backend.

.changelog/3511.feature.md

@@ -0,0 +1,3 @@
+go/consensus/api: Add Registry/Staking/Scheduler to ClientBackend
+
+This makes it more convenient to use the consensus client backend.

go/consensus/api/api.go

@@ -137,6 +137,15 @@ type ClientBackend interface {
 
 	// GetStatus returns the current status overview.
 	GetStatus(ctx context.Context) (*Status, error)
+
+	// Registry returns the registry backend.
+	Registry() registry.Backend
+
+	// Staking returns the staking backend.
+	Staking() staking.Backend
+
+	// Scheduler returns the scheduler backend.
+	Scheduler() scheduler.Backend
 }
 
 // Block is a consensus block.
@@ -233,17 +242,8 @@ type ServicesBackend interface {
 	// KeyManager returns the keymanager backend.
 	KeyManager() keymanager.Backend
 
-	// Registry returns the registry backend.
-	Registry() registry.Backend
-
 	// RootHash returns the roothash backend.
 	RootHash() roothash.Backend
-
-	// Staking returns the staking backend.
-	Staking() staking.Backend
-
-	// Scheduler returns the scheduler backend.
-	Scheduler() scheduler.Backend
 }
 
 // TransactionAuthHandler is the interface for handling transaction authentication

go/consensus/api/grpc.go

@@ -10,6 +10,9 @@ import (
 	"github.com/oasisprotocol/oasis-core/go/consensus/api/transaction"
 	epochtime "github.com/oasisprotocol/oasis-core/go/epochtime/api"
 	genesis "github.com/oasisprotocol/oasis-core/go/genesis/api"
+	registry "github.com/oasisprotocol/oasis-core/go/registry/api"
+	scheduler "github.com/oasisprotocol/oasis-core/go/scheduler/api"
+	staking "github.com/oasisprotocol/oasis-core/go/staking/api"
 	"github.com/oasisprotocol/oasis-core/go/storage/mkvs/syncer"
 )
 
@@ -823,6 +826,18 @@ func (c *consensusClient) WatchBlocks(ctx context.Context) (<-chan *Block, pubsu
 	return ch, sub, nil
 }
 
+func (c *consensusClient) Registry() registry.Backend {
+	return registry.NewRegistryClient(c.conn)
+}
+
+func (c *consensusClient) Staking() staking.Backend {
+	return staking.NewStakingClient(c.conn)
+}
+
+func (c *consensusClient) Scheduler() scheduler.Backend {
+	return scheduler.NewSchedulerClient(c.conn)
+}
+
 // NewConsensusClient creates a new gRPC consensus client service.
 func NewConsensusClient(c *grpc.ClientConn) ClientBackend {
 	return &consensusClient{