expose state tree on vmcontext for the init actor

chain/actor_init.go

@@ -101,10 +101,14 @@ func (ia InitActor) Exec(act *types.Actor, vmctx types.VMContext, p *ExecParams)
 
 	// NOTE: This is a privileged call that only the init actor is allowed to make
 	// FIXME: Had to comment this  because state is not in interface
-	_ = actor
+	state, err := vmctx.StateTree()
-	//if err := vmctx.state.SetActor(idAddr, &actor); err != nil {
+	if err != nil {
-	//return InvokeRet{}, errors.Wrap(err, "inserting new actor into state tree")
+		return InvokeRet{}, err
-	//}
+	}
+
+	if err := state.SetActor(idAddr, &actor); err != nil {
+		return InvokeRet{}, errors.Wrap(err, "inserting new actor into state tree")
+	}
 
 	c, err := vmctx.Storage().Put(self)
 	if err != nil {

chain/types/vmcontext.go

@@ -19,6 +19,11 @@ type Storage interface {
 	Commit(oldh cid.Cid, newh cid.Cid) error
 }
 
+type StateTree interface {
+	SetActor(addr address.Address, act *Actor) error
+	GetActor(addr address.Address) (*Actor, error)
+}
+
 type VMContext interface {
 	Message() *Message
 	Ipld() *hamt.CborIpldStore
@@ -26,4 +31,5 @@ type VMContext interface {
 	BlockHeight() uint64
 	GasUsed() BigInt
 	Storage() Storage
+	StateTree() (StateTree, error)
 }

chain/vm.go

@@ -88,6 +88,14 @@ func (vmc *VMContext) GasUsed() types.BigInt {
 	return types.NewInt(0)
 }
 
+func (vmc *VMContext) StateTree() (types.StateTree, error) {
+	if vmc.msg.To != InitActorAddress {
+		return nil, fmt.Errorf("only init actor can access state tree directly")
+	}
+
+	return vmc.state, nil
+}
+
 func makeVMContext(state *StateTree, bs bstore.Blockstore, sroot cid.Cid, msg *types.Message, height uint64) *VMContext {
 	cst := hamt.CSTFromBstore(bs)
 	return &VMContext{