sub reward actor

chain/actors/builtin/reward/reward.go

@@ -0,0 +1,30 @@
+package reward
+
+import (
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/go-state-types/cbor"
+	v0builtin "github.com/filecoin-project/specs-actors/actors/builtin"
+
+	"github.com/filecoin-project/lotus/chain/actors/adt"
+	"github.com/filecoin-project/lotus/chain/types"
+)
+
+var Address = v0builtin.RewardActorAddr
+
+func Load(store adt.Store, act *types.Actor) (st State, err error) {
+	switch act.Code {
+	case v0builtin.RewardActorCodeID:
+		out := v0State{store: store}
+		err := store.Get(store.Context(), act.Head, &out)
+		if err != nil {
+			return nil, err
+		}
+		return &out, nil
+	}
+	return nil, xerrors.Errorf("unknown actor code %s", act.Code)
+}
+
+type State interface {
+	cbor.Marshaler
+}

chain/actors/builtin/reward/v0.go

@@ -0,0 +1,11 @@
+package reward
+
+import (
+	"github.com/filecoin-project/specs-actors/actors/builtin/reward"
+	"github.com/filecoin-project/specs-actors/actors/util/adt"
+)
+
+type v0State struct {
+	reward.State
+	store adt.Store
+}