diff --git a/chain/actors/actor_init.go b/chain/actors/actor_init.go
index dddcb63cd..9df552554 100644
--- a/chain/actors/actor_init.go
+++ b/chain/actors/actor_init.go
@@ -183,6 +183,8 @@ func (ias *InitActorState) AddActor(cst *hamt.CborIpldStore, addr address.Addres
 	nid := ias.NextID
 	ias.NextID++
 
+	fmt.Println("ADD ACTOR: ", addr.String())
+
 	amap, err := hamt.LoadNode(context.TODO(), cst, ias.AddressMap)
 	if err != nil {
 		return address.Undef, err
diff --git a/chain/actors/actor_multisig_test.go b/chain/actors/actor_multisig_test.go
index b66a660a5..3fe5a349b 100644
--- a/chain/actors/actor_multisig_test.go
+++ b/chain/actors/actor_multisig_test.go
@@ -5,6 +5,7 @@ import (
 
 	cbor "github.com/ipfs/go-ipld-cbor"
 	"github.com/stretchr/testify/assert"
+	cbg "github.com/whyrusleeping/cbor-gen"
 
 	"github.com/filecoin-project/go-lotus/chain/actors"
 	"github.com/filecoin-project/go-lotus/chain/address"
@@ -23,7 +24,7 @@ func TestMultiSigCreate(t *testing.T) {
 
 	h := NewHarness(t, opts...)
 	ret, _ := h.CreateActor(t, creatorAddr, actors.MultisigActorCodeCid,
-		actors.MultiSigConstructorParams{
+		&actors.MultiSigConstructorParams{
 			Signers:  []address.Address{creatorAddr, sig1Addr, sig2Addr},
 			Required: 2,
 		})
@@ -49,8 +50,8 @@ func TestMultiSigOps(t *testing.T) {
 		HarnessAddr(&sig2Addr, 100000),
 		HarnessAddr(&outsideAddr, 100000),
 		HarnessActor(&multSigAddr, &creatorAddr, actors.MultisigActorCodeCid,
-			func() interface{} {
-				return actors.MultiSigConstructorParams{
+			func() cbg.CBORMarshaler {
+				return &actors.MultiSigConstructorParams{
 					Signers:  []address.Address{creatorAddr, sig1Addr, sig2Addr},
 					Required: 2,
 				}
@@ -71,8 +72,7 @@ func TestMultiSigOps(t *testing.T) {
 		// Transfer funds outside of multsig
 		const sendVal = 1000
 		ret, _ := h.Invoke(t, creatorAddr, multSigAddr, actors.MultiSigMethods.Propose,
-
-			actors.MultiSigProposeParams{
+			&actors.MultiSigProposeParams{
 				To:    outsideAddr,
 				Value: types.NewInt(sendVal),
 			})
@@ -82,12 +82,12 @@ func TestMultiSigOps(t *testing.T) {
 		assert.NoError(t, err, "decoding txid")
 
 		ret, _ = h.Invoke(t, outsideAddr, multSigAddr, actors.MultiSigMethods.Approve,
-			txIDParam)
+			&txIDParam)
 		assert.Equal(t, uint8(1), ret.ExitCode, "outsideAddr should not approve")
 		h.AssertBalanceChange(t, multSigAddr, 0)
 
 		ret2, _ := h.Invoke(t, sig1Addr, multSigAddr, actors.MultiSigMethods.Approve,
-			txIDParam)
+			&txIDParam)
 		ApplyOK(t, ret2)
 
 		h.AssertBalanceChange(t, outsideAddr, sendVal)
diff --git a/chain/actors/actor_paych.go b/chain/actors/actor_paych.go
index 107cf9efc..3d16d5eea 100644
--- a/chain/actors/actor_paych.go
+++ b/chain/actors/actor_paych.go
@@ -113,6 +113,7 @@ func (pca PaymentChannelActor) UpdateChannelState(act *types.Actor, vmctx types.
 	}
 
 	if err := vmctx.VerifySignature(sv.Signature, self.From, vb); err != nil {
+		fmt.Printf("bad bits: %x", vb)
 		return nil, err
 	}
 
@@ -120,7 +121,7 @@ func (pca PaymentChannelActor) UpdateChannelState(act *types.Actor, vmctx types.
 		return nil, aerrors.New(2, "cannot use this voucher yet!")
 	}
 
-	if sv.SecretPreimage != nil {
+	if len(sv.SecretPreimage) > 0 {
 		if !bytes.Equal(hash(params.Secret), sv.SecretPreimage) {
 			return nil, aerrors.New(3, "incorrect secret!")
 		}
diff --git a/chain/actors/actor_paych_test.go b/chain/actors/actor_paych_test.go
index c19d44792..347cab3bd 100644
--- a/chain/actors/actor_paych_test.go
+++ b/chain/actors/actor_paych_test.go
@@ -2,6 +2,7 @@ package actors_test
 
 import (
 	"context"
+	"fmt"
 	"testing"
 
 	"github.com/filecoin-project/go-lotus/chain/actors"
@@ -19,7 +20,7 @@ func TestPaychCreate(t *testing.T) {
 
 	h := NewHarness(t, opts...)
 	ret, _ := h.CreateActor(t, creatorAddr, actors.PaymentChannelActorCodeCid,
-		actors.PCAConstructorParams{
+		&actors.PCAConstructorParams{
 			To: targetAddr,
 		})
 	ApplyOK(t, ret)
@@ -36,6 +37,7 @@ func signVoucher(t *testing.T, w *wallet.Wallet, addr address.Address, sv *types
 		t.Fatal(err)
 	}
 
+	fmt.Printf("SIGNING: %x\n", vb)
 	sv.Signature = sig
 }
 
@@ -48,7 +50,7 @@ func TestPaychUpdate(t *testing.T) {
 
 	h := NewHarness(t, opts...)
 	ret, _ := h.CreateActor(t, creatorAddr, actors.PaymentChannelActorCodeCid,
-		actors.PCAConstructorParams{
+		&actors.PCAConstructorParams{
 			To: targetAddr,
 		})
 	ApplyOK(t, ret)
@@ -66,12 +68,12 @@ func TestPaychUpdate(t *testing.T) {
 	}
 	signVoucher(t, h.w, creatorAddr, sv)
 
-	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.UpdateChannelState, actors.PCAUpdateChannelStateParams{
+	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.UpdateChannelState, &actors.PCAUpdateChannelStateParams{
 		Sv: *sv,
 	})
 	ApplyOK(t, ret)
 
-	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.GetToSend, struct{}{})
+	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.GetToSend, nil)
 	ApplyOK(t, ret)
 
 	bi := types.BigFromBytes(ret.Return)
@@ -79,13 +81,13 @@ func TestPaychUpdate(t *testing.T) {
 		t.Fatal("toSend amount was wrong: ", bi.String())
 	}
 
-	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.Close, struct{}{})
+	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.Close, nil)
 	ApplyOK(t, ret)
 
 	// now we have to 'wait' for the chain to advance.
 	h.vm.SetBlockHeight(1000)
 
-	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.Collect, struct{}{})
+	ret, _ = h.Invoke(t, targetAddr, pch, actors.PCAMethods.Collect, nil)
 	ApplyOK(t, ret)
 
 	h.AssertBalanceChange(t, targetAddr, 100)
diff --git a/chain/actors/actor_storagemarket_test.go b/chain/actors/actor_storagemarket_test.go
index 9a59de800..974245fb6 100644
--- a/chain/actors/actor_storagemarket_test.go
+++ b/chain/actors/actor_storagemarket_test.go
@@ -13,11 +13,6 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestDumpEmpyStruct(t *testing.T) {
-	res, err := SerializeParams(struct{}{})
-	t.Logf("res: %x, err: %+v", res, err)
-}
-
 func TestStorageMarketCreateMiner(t *testing.T) {
 	var ownerAddr, workerAddr address.Address
 
@@ -31,7 +26,7 @@ func TestStorageMarketCreateMiner(t *testing.T) {
 	var minerAddr address.Address
 	{
 		ret, _ := h.Invoke(t, ownerAddr, StorageMarketAddress, SMAMethods.CreateStorageMiner,
-			CreateStorageMinerParams{
+			&CreateStorageMinerParams{
 				Owner:      ownerAddr,
 				Worker:     workerAddr,
 				SectorSize: types.NewInt(build.SectorSize),
@@ -45,7 +40,7 @@ func TestStorageMarketCreateMiner(t *testing.T) {
 
 	{
 		ret, _ := h.Invoke(t, ownerAddr, StorageMarketAddress, SMAMethods.IsMiner,
-			IsMinerParam{Addr: minerAddr})
+			&IsMinerParam{Addr: minerAddr})
 		ApplyOK(t, ret)
 
 		var output bool
@@ -61,7 +56,7 @@ func TestStorageMarketCreateMiner(t *testing.T) {
 
 	{
 		ret, _ := h.Invoke(t, ownerAddr, StorageMarketAddress, SMAMethods.PowerLookup,
-			PowerLookupParams{Miner: minerAddr})
+			&PowerLookupParams{Miner: minerAddr})
 		ApplyOK(t, ret)
 		power := types.BigFromBytes(ret.Return)
 
diff --git a/chain/actors/actors_test.go b/chain/actors/actors_test.go
index 7fce5eef2..6611e8c51 100644
--- a/chain/actors/actors_test.go
+++ b/chain/actors/actors_test.go
@@ -3,9 +3,10 @@ package actors_test
 import (
 	"context"
 	"encoding/binary"
-	"github.com/filecoin-project/go-lotus/build"
 	"testing"
 
+	"github.com/filecoin-project/go-lotus/build"
+
 	. "github.com/filecoin-project/go-lotus/chain/actors"
 	"github.com/filecoin-project/go-lotus/chain/address"
 	"github.com/filecoin-project/go-lotus/chain/gen"
@@ -14,7 +15,6 @@ import (
 	"github.com/filecoin-project/go-lotus/chain/vm"
 	dstore "github.com/ipfs/go-datastore"
 	bstore "github.com/ipfs/go-ipfs-blockstore"
-	cbor "github.com/ipfs/go-ipld-cbor"
 )
 
 func blsaddr(n uint64) address.Address {
@@ -62,7 +62,8 @@ func TestVMInvokeMethod(t *testing.T) {
 	vm, addrs := setupVMTestEnv(t)
 	from := addrs[0]
 
-	cenc, err := cbor.DumpObject(StorageMinerConstructorParams{})
+	var err error
+	cenc, err := SerializeParams(&StorageMinerConstructorParams{})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -71,7 +72,7 @@ func TestVMInvokeMethod(t *testing.T) {
 		Code:   StorageMinerCodeCid,
 		Params: cenc,
 	}
-	enc, err := cbor.DumpObject(execparams)
+	enc, err := SerializeParams(execparams)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -115,7 +116,8 @@ func TestStorageMarketActorCreateMiner(t *testing.T) {
 		SectorSize: types.NewInt(build.SectorSize),
 		PeerID:     "fakepeerid",
 	}
-	enc, err := cbor.DumpObject(params)
+	var err error
+	enc, err := SerializeParams(params)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/chain/actors/cbor_gen.go b/chain/actors/cbor_gen.go
index 52217948f..650733487 100644
--- a/chain/actors/cbor_gen.go
+++ b/chain/actors/cbor_gen.go
@@ -16,6 +16,10 @@ import (
 var _ = xerrors.Errorf
 
 func (t *InitActorState) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -32,14 +36,15 @@ func (t *InitActorState) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *InitActorState) UnmarshalCBOR(br io.Reader) error {
+func (t *InitActorState) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
 		return err
 	}
 	if maj != cbg.MajArray {
-		return fmt.Errorf("cbor input should be of type array (got %d, %d)", maj, extra)
+		return fmt.Errorf("cbor input should be of type array")
 	}
 
 	if extra != 2 {
@@ -69,6 +74,10 @@ func (t *InitActorState) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *ExecParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -88,7 +97,8 @@ func (t *ExecParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *ExecParams) UnmarshalCBOR(br io.Reader) error {
+func (t *ExecParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -132,6 +142,10 @@ func (t *ExecParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *AccountActorState) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -143,7 +157,8 @@ func (t *AccountActorState) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *AccountActorState) UnmarshalCBOR(br io.Reader) error {
+func (t *AccountActorState) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -159,13 +174,21 @@ func (t *AccountActorState) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Address (address.Address)
 
-	if err := t.Address.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Address.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *StorageMinerActorState) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{139}); err != nil {
 		return err
 	}
@@ -227,7 +250,8 @@ func (t *StorageMinerActorState) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *StorageMinerActorState) UnmarshalCBOR(br io.Reader) error {
+func (t *StorageMinerActorState) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -252,13 +276,21 @@ func (t *StorageMinerActorState) UnmarshalCBOR(br io.Reader) error {
 	}
 	// t.t.DePledgedCollateral (types.BigInt)
 
-	if err := t.DePledgedCollateral.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.DePledgedCollateral.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.DePledgeTime (types.BigInt)
 
-	if err := t.DePledgeTime.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.DePledgeTime.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Sectors (cid.Cid)
 
@@ -300,18 +332,30 @@ func (t *StorageMinerActorState) UnmarshalCBOR(br io.Reader) error {
 	t.ProvingSetSize = extra
 	// t.t.Power (types.BigInt)
 
-	if err := t.Power.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Power.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.SlashedAt (types.BigInt)
 
-	if err := t.SlashedAt.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.SlashedAt.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.OwedStorageCollateral (types.BigInt)
 
-	if err := t.OwedStorageCollateral.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.OwedStorageCollateral.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.ProvingPeriodEnd (uint64)
 
@@ -327,6 +371,10 @@ func (t *StorageMinerActorState) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *StorageMinerConstructorParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{132}); err != nil {
 		return err
 	}
@@ -356,7 +404,8 @@ func (t *StorageMinerConstructorParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *StorageMinerConstructorParams) UnmarshalCBOR(br io.Reader) error {
+func (t *StorageMinerConstructorParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -372,18 +421,30 @@ func (t *StorageMinerConstructorParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Owner (address.Address)
 
-	if err := t.Owner.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Owner.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Worker (address.Address)
 
-	if err := t.Worker.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Worker.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.SectorSize (types.BigInt)
 
-	if err := t.SectorSize.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.SectorSize.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.PeerID (peer.ID)
 
@@ -399,6 +460,10 @@ func (t *StorageMinerConstructorParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *CommitSectorParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{133}); err != nil {
 		return err
 	}
@@ -442,7 +507,8 @@ func (t *CommitSectorParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *CommitSectorParams) UnmarshalCBOR(br io.Reader) error {
+func (t *CommitSectorParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -538,6 +604,10 @@ func (t *CommitSectorParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MinerInfo) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{132}); err != nil {
 		return err
 	}
@@ -567,7 +637,8 @@ func (t *MinerInfo) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MinerInfo) UnmarshalCBOR(br io.Reader) error {
+func (t *MinerInfo) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -583,13 +654,21 @@ func (t *MinerInfo) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Owner (address.Address)
 
-	if err := t.Owner.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Owner.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Worker (address.Address)
 
-	if err := t.Worker.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Worker.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.PeerID (peer.ID)
 
@@ -603,20 +682,29 @@ func (t *MinerInfo) UnmarshalCBOR(br io.Reader) error {
 	}
 	// t.t.SectorSize (types.BigInt)
 
-	if err := t.SectorSize.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.SectorSize.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *SubmitPoStParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{128}); err != nil {
 		return err
 	}
 	return nil
 }
 
-func (t *SubmitPoStParams) UnmarshalCBOR(br io.Reader) error {
+func (t *SubmitPoStParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -634,6 +722,10 @@ func (t *SubmitPoStParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *PieceInclVoucherData) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -653,7 +745,8 @@ func (t *PieceInclVoucherData) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *PieceInclVoucherData) UnmarshalCBOR(br io.Reader) error {
+func (t *PieceInclVoucherData) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -686,13 +779,21 @@ func (t *PieceInclVoucherData) UnmarshalCBOR(br io.Reader) error {
 	}
 	// t.t.PieceSize (types.BigInt)
 
-	if err := t.PieceSize.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.PieceSize.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *InclusionProof) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -712,7 +813,8 @@ func (t *InclusionProof) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *InclusionProof) UnmarshalCBOR(br io.Reader) error {
+func (t *InclusionProof) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -757,6 +859,10 @@ func (t *InclusionProof) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *PaymentVerifyParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -779,7 +885,8 @@ func (t *PaymentVerifyParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *PaymentVerifyParams) UnmarshalCBOR(br io.Reader) error {
+func (t *PaymentVerifyParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -831,6 +938,10 @@ func (t *PaymentVerifyParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *UpdatePeerIDParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -845,7 +956,8 @@ func (t *UpdatePeerIDParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *UpdatePeerIDParams) UnmarshalCBOR(br io.Reader) error {
+func (t *UpdatePeerIDParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -873,6 +985,10 @@ func (t *UpdatePeerIDParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MultiSigActorState) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{132}); err != nil {
 		return err
 	}
@@ -909,7 +1025,8 @@ func (t *MultiSigActorState) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigActorState) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigActorState) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -997,6 +1114,10 @@ func (t *MultiSigActorState) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MultiSigConstructorParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -1018,7 +1139,8 @@ func (t *MultiSigConstructorParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigConstructorParams) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigConstructorParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1071,6 +1193,10 @@ func (t *MultiSigConstructorParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MultiSigProposeParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{132}); err != nil {
 		return err
 	}
@@ -1100,7 +1226,8 @@ func (t *MultiSigProposeParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigProposeParams) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigProposeParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1116,13 +1243,21 @@ func (t *MultiSigProposeParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.To (address.Address)
 
-	if err := t.To.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.To.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Value (types.BigInt)
 
-	if err := t.Value.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Value.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Method (uint64)
 
@@ -1155,6 +1290,10 @@ func (t *MultiSigProposeParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MultiSigTxID) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -1166,7 +1305,8 @@ func (t *MultiSigTxID) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigTxID) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigTxID) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1194,6 +1334,10 @@ func (t *MultiSigTxID) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MultiSigSwapSignerParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -1210,7 +1354,8 @@ func (t *MultiSigSwapSignerParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigSwapSignerParams) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigSwapSignerParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1226,18 +1371,30 @@ func (t *MultiSigSwapSignerParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.From (address.Address)
 
-	if err := t.From.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.From.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.To (address.Address)
 
-	if err := t.To.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.To.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *MultiSigChangeReqParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -1249,7 +1406,8 @@ func (t *MultiSigChangeReqParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigChangeReqParams) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigChangeReqParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1277,6 +1435,10 @@ func (t *MultiSigChangeReqParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MTransaction) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{138}); err != nil {
 		return err
 	}
@@ -1341,7 +1503,8 @@ func (t *MTransaction) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MTransaction) UnmarshalCBOR(br io.Reader) error {
+func (t *MTransaction) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1377,13 +1540,21 @@ func (t *MTransaction) UnmarshalCBOR(br io.Reader) error {
 	t.TxID = extra
 	// t.t.To (address.Address)
 
-	if err := t.To.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.To.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Value (types.BigInt)
 
-	if err := t.Value.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Value.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Method (uint64)
 
@@ -1485,6 +1656,10 @@ func (t *MTransaction) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MultiSigRemoveSignerParam) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -1501,7 +1676,8 @@ func (t *MultiSigRemoveSignerParam) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigRemoveSignerParam) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigRemoveSignerParam) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1517,8 +1693,12 @@ func (t *MultiSigRemoveSignerParam) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Signer (address.Address)
 
-	if err := t.Signer.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Signer.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Decrease (bool)
 
@@ -1541,6 +1721,10 @@ func (t *MultiSigRemoveSignerParam) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *MultiSigAddSignerParam) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -1557,7 +1741,8 @@ func (t *MultiSigAddSignerParam) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MultiSigAddSignerParam) UnmarshalCBOR(br io.Reader) error {
+func (t *MultiSigAddSignerParam) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1573,8 +1758,12 @@ func (t *MultiSigAddSignerParam) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Signer (address.Address)
 
-	if err := t.Signer.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Signer.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Increase (bool)
 
@@ -1597,6 +1786,10 @@ func (t *MultiSigAddSignerParam) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *PaymentChannelActorState) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{134}); err != nil {
 		return err
 	}
@@ -1648,7 +1841,8 @@ func (t *PaymentChannelActorState) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *PaymentChannelActorState) UnmarshalCBOR(br io.Reader) error {
+func (t *PaymentChannelActorState) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1664,18 +1858,30 @@ func (t *PaymentChannelActorState) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.From (address.Address)
 
-	if err := t.From.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.From.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.To (address.Address)
 
-	if err := t.To.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.To.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.ToSend (types.BigInt)
 
-	if err := t.ToSend.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.ToSend.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.ClosingAt (uint64)
 
@@ -1727,10 +1933,24 @@ func (t *PaymentChannelActorState) UnmarshalCBOR(br io.Reader) error {
 
 		var v *LaneState
 
-		v = new(LaneState)
+		{
+
+			pb, err := br.PeekByte()
+			if err != nil {
+				return err
+			}
+			if pb == cbg.CborNull[0] {
+				var nbuf [1]byte
+				if _, err := br.Read(nbuf[:]); err != nil {
+					return err
+				}
+			} else {
+				v = new(LaneState)
+				if err := v.UnmarshalCBOR(br); err != nil {
+					return err
+				}
+			}
 
-		if err := v.UnmarshalCBOR(br); err != nil {
-			return err
 		}
 
 		t.LaneStates[k] = v
@@ -1740,6 +1960,10 @@ func (t *PaymentChannelActorState) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *PCAConstructorParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -1751,7 +1975,8 @@ func (t *PCAConstructorParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *PCAConstructorParams) UnmarshalCBOR(br io.Reader) error {
+func (t *PCAConstructorParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1767,13 +1992,21 @@ func (t *PCAConstructorParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.To (address.Address)
 
-	if err := t.To.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.To.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *LaneState) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{131}); err != nil {
 		return err
 	}
@@ -1795,7 +2028,8 @@ func (t *LaneState) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *LaneState) UnmarshalCBOR(br io.Reader) error {
+func (t *LaneState) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1828,8 +2062,12 @@ func (t *LaneState) UnmarshalCBOR(br io.Reader) error {
 	}
 	// t.t.Redeemed (types.BigInt)
 
-	if err := t.Redeemed.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Redeemed.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Nonce (uint64)
 
@@ -1845,6 +2083,10 @@ func (t *LaneState) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *PCAUpdateChannelStateParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{131}); err != nil {
 		return err
 	}
@@ -1872,7 +2114,8 @@ func (t *PCAUpdateChannelStateParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *PCAUpdateChannelStateParams) UnmarshalCBOR(br io.Reader) error {
+func (t *PCAUpdateChannelStateParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1888,8 +2131,12 @@ func (t *PCAUpdateChannelStateParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Sv (types.SignedVoucher)
 
-	if err := t.Sv.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Sv.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Secret ([]uint8)
 
@@ -1929,6 +2176,10 @@ func (t *PCAUpdateChannelStateParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *PaymentInfo) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{132}); err != nil {
 		return err
 	}
@@ -1948,7 +2199,7 @@ func (t *PaymentInfo) MarshalCBOR(w io.Writer) error {
 		return xerrors.Errorf("failed to write cid field t.ChannelMessage: %w", err)
 	}
 
-	// t.t.Vouchers ([]types.SignedVoucher)
+	// t.t.Vouchers ([]*types.SignedVoucher)
 	if _, err := w.Write(cbg.CborEncodeMajorType(cbg.MajArray, uint64(len(t.Vouchers)))); err != nil {
 		return err
 	}
@@ -1960,7 +2211,8 @@ func (t *PaymentInfo) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *PaymentInfo) UnmarshalCBOR(br io.Reader) error {
+func (t *PaymentInfo) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -1976,13 +2228,21 @@ func (t *PaymentInfo) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.PayChActor (address.Address)
 
-	if err := t.PayChActor.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.PayChActor.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Payer (address.Address)
 
-	if err := t.Payer.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Payer.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.ChannelMessage (cid.Cid)
 
@@ -1993,7 +2253,7 @@ func (t *PaymentInfo) UnmarshalCBOR(br io.Reader) error {
 		}
 		t.ChannelMessage = c
 	}
-	// t.t.Vouchers ([]types.SignedVoucher)
+	// t.t.Vouchers ([]*types.SignedVoucher)
 
 	maj, extra, err = cbg.CborReadHeader(br)
 	if err != nil {
@@ -2022,6 +2282,10 @@ func (t *PaymentInfo) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *StorageMarketState) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -2038,7 +2302,8 @@ func (t *StorageMarketState) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *StorageMarketState) UnmarshalCBOR(br io.Reader) error {
+func (t *StorageMarketState) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -2063,13 +2328,21 @@ func (t *StorageMarketState) UnmarshalCBOR(br io.Reader) error {
 	}
 	// t.t.TotalStorage (types.BigInt)
 
-	if err := t.TotalStorage.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.TotalStorage.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *CreateStorageMinerParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{132}); err != nil {
 		return err
 	}
@@ -2099,7 +2372,8 @@ func (t *CreateStorageMinerParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *CreateStorageMinerParams) UnmarshalCBOR(br io.Reader) error {
+func (t *CreateStorageMinerParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -2115,18 +2389,30 @@ func (t *CreateStorageMinerParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Owner (address.Address)
 
-	if err := t.Owner.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Owner.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Worker (address.Address)
 
-	if err := t.Worker.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Worker.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.SectorSize (types.BigInt)
 
-	if err := t.SectorSize.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.SectorSize.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.PeerID (peer.ID)
 
@@ -2142,6 +2428,10 @@ func (t *CreateStorageMinerParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *IsMinerParam) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -2153,7 +2443,8 @@ func (t *IsMinerParam) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *IsMinerParam) UnmarshalCBOR(br io.Reader) error {
+func (t *IsMinerParam) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -2169,13 +2460,21 @@ func (t *IsMinerParam) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Addr (address.Address)
 
-	if err := t.Addr.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Addr.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *PowerLookupParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -2187,7 +2486,8 @@ func (t *PowerLookupParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *PowerLookupParams) UnmarshalCBOR(br io.Reader) error {
+func (t *PowerLookupParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -2203,13 +2503,21 @@ func (t *PowerLookupParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Miner (address.Address)
 
-	if err := t.Miner.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Miner.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
 
 func (t *UpdateStorageParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{129}); err != nil {
 		return err
 	}
@@ -2221,7 +2529,8 @@ func (t *UpdateStorageParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *UpdateStorageParams) UnmarshalCBOR(br io.Reader) error {
+func (t *UpdateStorageParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -2237,8 +2546,12 @@ func (t *UpdateStorageParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Delta (types.BigInt)
 
-	if err := t.Delta.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Delta.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	return nil
 }
diff --git a/chain/actors/harness2_test.go b/chain/actors/harness2_test.go
index 3c46000bc..55d766a8c 100644
--- a/chain/actors/harness2_test.go
+++ b/chain/actors/harness2_test.go
@@ -1,6 +1,7 @@
 package actors_test
 
 import (
+	"bytes"
 	"context"
 	"testing"
 
@@ -9,7 +10,7 @@ import (
 	hamt "github.com/ipfs/go-hamt-ipld"
 	blockstore "github.com/ipfs/go-ipfs-blockstore"
 	bstore "github.com/ipfs/go-ipfs-blockstore"
-	cbor "github.com/ipfs/go-ipld-cbor"
+	cbg "github.com/whyrusleeping/cbor-gen"
 	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/go-lotus/chain/actors"
@@ -91,7 +92,7 @@ func HarnessMiner(addr *address.Address) HarnessOpt {
 	}
 }
 
-func HarnessActor(actor *address.Address, creator *address.Address, code cid.Cid, params func() interface{}) HarnessOpt {
+func HarnessActor(actor *address.Address, creator *address.Address, code cid.Cid, params func() cbg.CBORMarshaler) HarnessOpt {
 	return func(t testing.TB, h *Harness) error {
 		if h.Stage != HarnessPostInit {
 			return nil
@@ -205,7 +206,7 @@ func (h *Harness) Apply(t testing.TB, msg types.Message) (*vm.ApplyRet, *state.S
 }
 
 func (h *Harness) CreateActor(t testing.TB, from address.Address,
-	code cid.Cid, params interface{}) (*vm.ApplyRet, *state.StateTree) {
+	code cid.Cid, params cbg.CBORMarshaler) (*vm.ApplyRet, *state.StateTree) {
 	t.Helper()
 
 	return h.Apply(t, types.Message{
@@ -237,7 +238,7 @@ func (h *Harness) SendFunds(t testing.TB, from address.Address, to address.Addre
 }
 
 func (h *Harness) Invoke(t testing.TB, from address.Address, to address.Address,
-	method uint64, params interface{}) (*vm.ApplyRet, *state.StateTree) {
+	method uint64, params cbg.CBORMarshaler) (*vm.ApplyRet, *state.StateTree) {
 	t.Helper()
 	return h.Apply(t, types.Message{
 		To:       to,
@@ -297,11 +298,14 @@ func (h *Harness) AssertBalanceChange(t testing.TB, addr address.Address, amt in
 	}
 }
 
-func DumpObject(t testing.TB, obj interface{}) []byte {
+func DumpObject(t testing.TB, obj cbg.CBORMarshaler) []byte {
+	if obj == nil {
+		return nil
+	}
 	t.Helper()
-	enc, err := cbor.DumpObject(obj)
-	if err != nil {
+	b := new(bytes.Buffer)
+	if err := obj.MarshalCBOR(b); err != nil {
 		t.Fatalf("dumping params: %+v", err)
 	}
-	return enc
+	return b.Bytes()
 }
diff --git a/chain/gen/gen.go b/chain/gen/gen.go
index 1dbb1093b..ef6a856bb 100644
--- a/chain/gen/gen.go
+++ b/chain/gen/gen.go
@@ -67,7 +67,7 @@ func (m mybs) Get(c cid.Cid) (block.Block, error) {
 	b, err := m.Blockstore.Get(c)
 	if err != nil {
 		// change to error for stacktraces, don't commit with that pls
-		log.Warnf("Get failed: %s %s", c, err)
+		//log.Warnf("Get failed: %s %s", c, err)
 		return nil, err
 	}
 
@@ -119,6 +119,7 @@ func NewGenerator() (*ChainGen, error) {
 		if err != nil {
 			return nil, xerrors.Errorf("failed to generate receiver key: %w", err)
 		}
+		fmt.Println("RECEIVER KEY: ", receievers[r].String())
 	}
 
 	minercfg := &GenMinerCfg{
diff --git a/chain/gen/utils.go b/chain/gen/utils.go
index dfe8f2d27..c45c21e1f 100644
--- a/chain/gen/utils.go
+++ b/chain/gen/utils.go
@@ -55,8 +55,6 @@ func SetupInitActor(bs bstore.Blockstore, addrs []address.Address) (*types.Actor
 		return nil, err
 	}
 
-	fmt.Println("INIT ACTOR HEAD: ", statecid)
-
 	act := &types.Actor{
 		Code: actors.InitActorCodeCid,
 		Head: statecid,
diff --git a/chain/state/statetree.go b/chain/state/statetree.go
index 8b3df8e74..50e726bb7 100644
--- a/chain/state/statetree.go
+++ b/chain/state/statetree.go
@@ -61,8 +61,6 @@ func (st *StateTree) SetActor(addr address.Address, act *types.Actor) error {
 		if act == cact {
 			return nil
 		}
-	} else {
-		st.actorcache[addr] = act
 	}
 
 	return st.root.Set(context.TODO(), string(addr.Bytes()), act)
@@ -91,7 +89,7 @@ func (st *StateTree) GetActor(addr address.Address) (*types.Actor, error) {
 		iaddr, err := st.lookupID(addr)
 		if err != nil {
 			if xerrors.Is(err, hamt.ErrNotFound) {
-				return nil, xerrors.Errorf("lookup failed: %w", types.ErrActorNotFound)
+				return nil, xerrors.Errorf("resolution lookup failed (%s): %w", addr, types.ErrActorNotFound)
 			}
 			return nil, xerrors.Errorf("address resolution: %w", err)
 		}
diff --git a/chain/types/cbor_gen.go b/chain/types/cbor_gen.go
index 059662b7b..a6aa11da7 100644
--- a/chain/types/cbor_gen.go
+++ b/chain/types/cbor_gen.go
@@ -14,6 +14,10 @@ import (
 var _ = xerrors.Errorf
 
 func (t *BlockHeader) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{140}); err != nil {
 		return err
 	}
@@ -23,7 +27,7 @@ func (t *BlockHeader) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.t.Tickets ([]*Ticket)
+	// t.t.Tickets ([]*types.Ticket)
 	if _, err := w.Write(cbg.CborEncodeMajorType(cbg.MajArray, uint64(len(t.Tickets)))); err != nil {
 		return err
 	}
@@ -51,7 +55,7 @@ func (t *BlockHeader) MarshalCBOR(w io.Writer) error {
 		}
 	}
 
-	// t.t.ParentWeight (BigInt)
+	// t.t.ParentWeight (types.BigInt)
 	if err := t.ParentWeight.MarshalCBOR(w); err != nil {
 		return err
 	}
@@ -71,7 +75,7 @@ func (t *BlockHeader) MarshalCBOR(w io.Writer) error {
 		return xerrors.Errorf("failed to write cid field t.Messages: %w", err)
 	}
 
-	// t.t.BLSAggregate (Signature)
+	// t.t.BLSAggregate (types.Signature)
 	if err := t.BLSAggregate.MarshalCBOR(w); err != nil {
 		return err
 	}
@@ -86,14 +90,15 @@ func (t *BlockHeader) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.t.BlockSig (Signature)
+	// t.t.BlockSig (types.Signature)
 	if err := t.BlockSig.MarshalCBOR(w); err != nil {
 		return err
 	}
 	return nil
 }
 
-func (t *BlockHeader) UnmarshalCBOR(br io.Reader) error {
+func (t *BlockHeader) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -109,10 +114,14 @@ func (t *BlockHeader) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Miner (address.Address)
 
-	if err := t.Miner.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Miner.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
-	// t.t.Tickets ([]*Ticket)
+	// t.t.Tickets ([]*types.Ticket)
 
 	maj, extra, err = cbg.CborReadHeader(br)
 	if err != nil {
@@ -179,10 +188,14 @@ func (t *BlockHeader) UnmarshalCBOR(br io.Reader) error {
 		t.Parents[i] = c
 	}
 
-	// t.t.ParentWeight (BigInt)
+	// t.t.ParentWeight (types.BigInt)
+
+	{
+
+		if err := t.ParentWeight.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.ParentWeight.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	// t.t.Height (uint64)
 
@@ -212,10 +225,14 @@ func (t *BlockHeader) UnmarshalCBOR(br io.Reader) error {
 		}
 		t.Messages = c
 	}
-	// t.t.BLSAggregate (Signature)
+	// t.t.BLSAggregate (types.Signature)
+
+	{
+
+		if err := t.BLSAggregate.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.BLSAggregate.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	// t.t.MessageReceipts (cid.Cid)
 
@@ -236,15 +253,23 @@ func (t *BlockHeader) UnmarshalCBOR(br io.Reader) error {
 		return fmt.Errorf("wrong type for uint64 field")
 	}
 	t.Timestamp = extra
-	// t.t.BlockSig (Signature)
+	// t.t.BlockSig (types.Signature)
+
+	{
+
+		if err := t.BlockSig.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.BlockSig.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	return nil
 }
 
 func (t *Ticket) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{131}); err != nil {
 		return err
 	}
@@ -275,7 +300,8 @@ func (t *Ticket) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *Ticket) UnmarshalCBOR(br io.Reader) error {
+func (t *Ticket) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -344,6 +370,10 @@ func (t *Ticket) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *Message) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{136}); err != nil {
 		return err
 	}
@@ -363,17 +393,17 @@ func (t *Message) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.t.Value (BigInt)
+	// t.t.Value (types.BigInt)
 	if err := t.Value.MarshalCBOR(w); err != nil {
 		return err
 	}
 
-	// t.t.GasPrice (BigInt)
+	// t.t.GasPrice (types.BigInt)
 	if err := t.GasPrice.MarshalCBOR(w); err != nil {
 		return err
 	}
 
-	// t.t.GasLimit (BigInt)
+	// t.t.GasLimit (types.BigInt)
 	if err := t.GasLimit.MarshalCBOR(w); err != nil {
 		return err
 	}
@@ -393,7 +423,8 @@ func (t *Message) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *Message) UnmarshalCBOR(br io.Reader) error {
+func (t *Message) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -409,13 +440,21 @@ func (t *Message) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.To (address.Address)
 
-	if err := t.To.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.To.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.From (address.Address)
 
-	if err := t.From.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.From.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Nonce (uint64)
 
@@ -427,20 +466,32 @@ func (t *Message) UnmarshalCBOR(br io.Reader) error {
 		return fmt.Errorf("wrong type for uint64 field")
 	}
 	t.Nonce = extra
-	// t.t.Value (BigInt)
+	// t.t.Value (types.BigInt)
+
+	{
+
+		if err := t.Value.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.Value.UnmarshalCBOR(br); err != nil {
-		return err
 	}
-	// t.t.GasPrice (BigInt)
+	// t.t.GasPrice (types.BigInt)
+
+	{
+
+		if err := t.GasPrice.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.GasPrice.UnmarshalCBOR(br); err != nil {
-		return err
 	}
-	// t.t.GasLimit (BigInt)
+	// t.t.GasLimit (types.BigInt)
+
+	{
+
+		if err := t.GasLimit.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.GasLimit.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	// t.t.Method (uint64)
 
@@ -473,23 +524,28 @@ func (t *Message) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *SignedMessage) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
 
-	// t.t.Message (Message)
+	// t.t.Message (types.Message)
 	if err := t.Message.MarshalCBOR(w); err != nil {
 		return err
 	}
 
-	// t.t.Signature (Signature)
+	// t.t.Signature (types.Signature)
 	if err := t.Signature.MarshalCBOR(w); err != nil {
 		return err
 	}
 	return nil
 }
 
-func (t *SignedMessage) UnmarshalCBOR(br io.Reader) error {
+func (t *SignedMessage) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -503,20 +559,32 @@ func (t *SignedMessage) UnmarshalCBOR(br io.Reader) error {
 		return fmt.Errorf("cbor input had wrong number of fields")
 	}
 
-	// t.t.Message (Message)
+	// t.t.Message (types.Message)
+
+	{
+
+		if err := t.Message.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.Message.UnmarshalCBOR(br); err != nil {
-		return err
 	}
-	// t.t.Signature (Signature)
+	// t.t.Signature (types.Signature)
+
+	{
+
+		if err := t.Signature.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.Signature.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	return nil
 }
 
 func (t *MsgMeta) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -533,7 +601,8 @@ func (t *MsgMeta) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *MsgMeta) UnmarshalCBOR(br io.Reader) error {
+func (t *MsgMeta) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -569,6 +638,10 @@ func (t *MsgMeta) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *SignedVoucher) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{137}); err != nil {
 		return err
 	}
@@ -586,7 +659,7 @@ func (t *SignedVoucher) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.t.Extra (ModVerifyParams)
+	// t.t.Extra (types.ModVerifyParams)
 	if err := t.Extra.MarshalCBOR(w); err != nil {
 		return err
 	}
@@ -601,7 +674,7 @@ func (t *SignedVoucher) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.t.Amount (BigInt)
+	// t.t.Amount (types.BigInt)
 	if err := t.Amount.MarshalCBOR(w); err != nil {
 		return err
 	}
@@ -611,7 +684,7 @@ func (t *SignedVoucher) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.t.Merges ([]Merge)
+	// t.t.Merges ([]types.Merge)
 	if _, err := w.Write(cbg.CborEncodeMajorType(cbg.MajArray, uint64(len(t.Merges)))); err != nil {
 		return err
 	}
@@ -621,14 +694,15 @@ func (t *SignedVoucher) MarshalCBOR(w io.Writer) error {
 		}
 	}
 
-	// t.t.Signature (Signature)
+	// t.t.Signature (types.Signature)
 	if err := t.Signature.MarshalCBOR(w); err != nil {
 		return err
 	}
 	return nil
 }
 
-func (t *SignedVoucher) UnmarshalCBOR(br io.Reader) error {
+func (t *SignedVoucher) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -669,12 +743,26 @@ func (t *SignedVoucher) UnmarshalCBOR(br io.Reader) error {
 	if _, err := io.ReadFull(br, t.SecretPreimage); err != nil {
 		return err
 	}
-	// t.t.Extra (ModVerifyParams)
+	// t.t.Extra (types.ModVerifyParams)
 
-	t.Extra = new(ModVerifyParams)
+	{
+
+		pb, err := br.PeekByte()
+		if err != nil {
+			return err
+		}
+		if pb == cbg.CborNull[0] {
+			var nbuf [1]byte
+			if _, err := br.Read(nbuf[:]); err != nil {
+				return err
+			}
+		} else {
+			t.Extra = new(ModVerifyParams)
+			if err := t.Extra.UnmarshalCBOR(br); err != nil {
+				return err
+			}
+		}
 
-	if err := t.Extra.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	// t.t.Lane (uint64)
 
@@ -696,10 +784,14 @@ func (t *SignedVoucher) UnmarshalCBOR(br io.Reader) error {
 		return fmt.Errorf("wrong type for uint64 field")
 	}
 	t.Nonce = extra
-	// t.t.Amount (BigInt)
+	// t.t.Amount (types.BigInt)
+
+	{
+
+		if err := t.Amount.UnmarshalCBOR(br); err != nil {
+			return err
+		}
 
-	if err := t.Amount.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	// t.t.MinCloseHeight (uint64)
 
@@ -711,7 +803,7 @@ func (t *SignedVoucher) UnmarshalCBOR(br io.Reader) error {
 		return fmt.Errorf("wrong type for uint64 field")
 	}
 	t.MinCloseHeight = extra
-	// t.t.Merges ([]Merge)
+	// t.t.Merges ([]types.Merge)
 
 	maj, extra, err = cbg.CborReadHeader(br)
 	if err != nil {
@@ -736,17 +828,35 @@ func (t *SignedVoucher) UnmarshalCBOR(br io.Reader) error {
 		t.Merges[i] = v
 	}
 
-	// t.t.Signature (Signature)
+	// t.t.Signature (types.Signature)
 
-	t.Signature = new(Signature)
+	{
+
+		pb, err := br.PeekByte()
+		if err != nil {
+			return err
+		}
+		if pb == cbg.CborNull[0] {
+			var nbuf [1]byte
+			if _, err := br.Read(nbuf[:]); err != nil {
+				return err
+			}
+		} else {
+			t.Signature = new(Signature)
+			if err := t.Signature.UnmarshalCBOR(br); err != nil {
+				return err
+			}
+		}
 
-	if err := t.Signature.UnmarshalCBOR(br); err != nil {
-		return err
 	}
 	return nil
 }
 
 func (t *ModVerifyParams) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{131}); err != nil {
 		return err
 	}
@@ -771,7 +881,8 @@ func (t *ModVerifyParams) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *ModVerifyParams) UnmarshalCBOR(br io.Reader) error {
+func (t *ModVerifyParams) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
@@ -787,8 +898,12 @@ func (t *ModVerifyParams) UnmarshalCBOR(br io.Reader) error {
 
 	// t.t.Actor (address.Address)
 
-	if err := t.Actor.UnmarshalCBOR(br); err != nil {
-		return err
+	{
+
+		if err := t.Actor.UnmarshalCBOR(br); err != nil {
+			return err
+		}
+
 	}
 	// t.t.Method (uint64)
 
@@ -821,6 +936,10 @@ func (t *ModVerifyParams) UnmarshalCBOR(br io.Reader) error {
 }
 
 func (t *Merge) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
 	if _, err := w.Write([]byte{130}); err != nil {
 		return err
 	}
@@ -837,7 +956,8 @@ func (t *Merge) MarshalCBOR(w io.Writer) error {
 	return nil
 }
 
-func (t *Merge) UnmarshalCBOR(br io.Reader) error {
+func (t *Merge) UnmarshalCBOR(r io.Reader) error {
+	br := cbg.GetPeeker(r)
 
 	maj, extra, err := cbg.CborReadHeader(br)
 	if err != nil {
diff --git a/chain/types/signature.go b/chain/types/signature.go
index fe9572c7f..b82d552f0 100644
--- a/chain/types/signature.go
+++ b/chain/types/signature.go
@@ -6,8 +6,6 @@ import (
 	"fmt"
 	"io"
 
-	cbor "github.com/ipfs/go-ipld-cbor"
-	"github.com/polydawn/refmt/obj/atlas"
 	cbg "github.com/whyrusleeping/cbor-gen"
 )
 
@@ -25,21 +23,6 @@ const (
 	IKTBLS
 )
 
-func init() {
-	cbor.RegisterCborType(atlas.BuildEntry(Signature{}).Transform().
-		TransformMarshal(atlas.MakeMarshalTransformFunc(
-			func(s Signature) ([]byte, error) {
-				buf := make([]byte, 4)
-				n := binary.PutUvarint(buf, uint64(s.TypeCode()))
-				return append(buf[:n], s.Data...), nil
-			})).
-		TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
-			func(x []byte) (Signature, error) {
-				return SignatureFromBytes(x)
-			})).
-		Complete())
-}
-
 type Signature struct {
 	Type string
 	Data []byte
@@ -80,6 +63,11 @@ func (s *Signature) TypeCode() int {
 }
 
 func (s *Signature) MarshalCBOR(w io.Writer) error {
+	if s == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+
 	header := cbg.CborEncodeMajorType(cbg.MajByteString, uint64(len(s.Data)+1))
 
 	if _, err := w.Write(header); err != nil {
diff --git a/chain/types/voucher.go b/chain/types/voucher.go
index dc92f36a0..0ce563cdc 100644
--- a/chain/types/voucher.go
+++ b/chain/types/voucher.go
@@ -8,12 +8,6 @@ import (
 	cbor "github.com/ipfs/go-ipld-cbor"
 )
 
-func init() {
-	cbor.RegisterCborType(Merge{})
-	cbor.RegisterCborType(SignedVoucher{})
-	cbor.RegisterCborType(ModVerifyParams{})
-}
-
 type SignedVoucher struct {
 	TimeLock       uint64
 	SecretPreimage []byte
@@ -31,16 +25,22 @@ type SignedVoucher struct {
 func (sv *SignedVoucher) SigningBytes() ([]byte, error) {
 	osv := *sv
 	osv.Signature = nil
-	return cbor.DumpObject(osv)
+
+	buf := new(bytes.Buffer)
+	if err := osv.MarshalCBOR(buf); err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
 }
 
 func (sv *SignedVoucher) EncodedString() (string, error) {
-	data, err := cbor.DumpObject(sv)
-	if err != nil {
+	buf := new(bytes.Buffer)
+	if err := sv.MarshalCBOR(buf); err != nil {
 		return "", err
 	}
 
-	return base64.RawURLEncoding.EncodeToString(data), nil
+	return base64.RawURLEncoding.EncodeToString(buf.Bytes()), nil
 }
 
 func (sv *SignedVoucher) Equals(other *SignedVoucher) bool {
diff --git a/chain/vm/invoker_test.go b/chain/vm/invoker_test.go
index d1a8207fc..afa339873 100644
--- a/chain/vm/invoker_test.go
+++ b/chain/vm/invoker_test.go
@@ -1,11 +1,15 @@
 package vm
 
 import (
+	"fmt"
+	"io"
 	"testing"
 
 	cbor "github.com/ipfs/go-ipld-cbor"
 	"github.com/stretchr/testify/assert"
+	cbg "github.com/whyrusleeping/cbor-gen"
 
+	"github.com/filecoin-project/go-lotus/chain/actors"
 	"github.com/filecoin-project/go-lotus/chain/actors/aerrors"
 	"github.com/filecoin-project/go-lotus/chain/types"
 )
@@ -15,6 +19,25 @@ type basicParams struct {
 	B byte
 }
 
+func (b *basicParams) MarshalCBOR(w io.Writer) error {
+	_, err := w.Write(cbg.CborEncodeMajorType(cbg.MajUnsignedInt, uint64(b.B)))
+	return err
+}
+
+func (b *basicParams) UnmarshalCBOR(r io.Reader) error {
+	maj, val, err := cbg.CborReadHeader(r)
+	if err != nil {
+		return err
+	}
+
+	if maj != cbg.MajUnsignedInt {
+		return fmt.Errorf("bad cbor type")
+	}
+
+	b.B = byte(val)
+	return nil
+}
+
 func init() {
 	cbor.RegisterCborType(basicParams{})
 }
@@ -39,6 +62,7 @@ func (basicContract) InvokeSomething0(act *types.Actor, vmctx types.VMContext,
 	params *basicParams) ([]byte, aerrors.ActorError) {
 	return nil, aerrors.New(params.B, "params.B")
 }
+
 func (basicContract) BadParam(act *types.Actor, vmctx types.VMContext,
 	params *basicParams) ([]byte, aerrors.ActorError) {
 	return nil, aerrors.New(255, "bad params")
@@ -55,7 +79,7 @@ func TestInvokerBasic(t *testing.T) {
 	assert.NoError(t, err)
 
 	{
-		bParam, err := cbor.DumpObject(basicParams{B: 1})
+		bParam, err := actors.SerializeParams(&basicParams{B: 1})
 		assert.NoError(t, err)
 
 		_, aerr := code[0](nil, &VMContext{}, bParam)
@@ -67,7 +91,7 @@ func TestInvokerBasic(t *testing.T) {
 	}
 
 	{
-		bParam, err := cbor.DumpObject(basicParams{B: 2})
+		bParam, err := actors.SerializeParams(&basicParams{B: 2})
 		assert.NoError(t, err)
 
 		_, aerr := code[10](nil, &VMContext{}, bParam)
@@ -77,7 +101,7 @@ func TestInvokerBasic(t *testing.T) {
 		}
 	}
 
-	_, aerr := code[1](nil, &VMContext{}, []byte{0})
+	_, aerr := code[1](nil, &VMContext{}, []byte{99})
 	if aerrors.IsFatal(aerr) {
 		t.Fatal("err should not be fatal")
 	}
diff --git a/chain/vm/mkactor.go b/chain/vm/mkactor.go
index 03dd31e64..8d0026f7c 100644
--- a/chain/vm/mkactor.go
+++ b/chain/vm/mkactor.go
@@ -2,9 +2,9 @@ package vm
 
 import (
 	"context"
-	"fmt"
 
 	"github.com/filecoin-project/go-lotus/chain/actors"
+	"github.com/filecoin-project/go-lotus/chain/actors/aerrors"
 	"github.com/filecoin-project/go-lotus/chain/address"
 	"github.com/filecoin-project/go-lotus/chain/state"
 	"github.com/filecoin-project/go-lotus/chain/types"
@@ -27,42 +27,41 @@ func init() {
 
 var EmptyObjectCid cid.Cid
 
-func TryCreateAccountActor(st *state.StateTree, addr address.Address) (*types.Actor, error) {
+func TryCreateAccountActor(st *state.StateTree, addr address.Address) (*types.Actor, aerrors.ActorError) {
 	act, err := makeActor(st, addr)
 	if err != nil {
 		return nil, err
 	}
 
-	_, err = st.RegisterNewAddress(addr, act)
-	if err != nil {
-		return nil, err
+	if _, err := st.RegisterNewAddress(addr, act); err != nil {
+		return nil, aerrors.Escalate(err, "registering actor address")
 	}
 
 	return act, nil
 }
 
-func makeActor(st *state.StateTree, addr address.Address) (*types.Actor, error) {
+func makeActor(st *state.StateTree, addr address.Address) (*types.Actor, aerrors.ActorError) {
 	switch addr.Protocol() {
 	case address.BLS:
 		return NewBLSAccountActor(st, addr)
 	case address.SECP256K1:
 		return NewSecp256k1AccountActor(st, addr)
 	case address.ID:
-		return nil, fmt.Errorf("no actor with given ID")
+		return nil, aerrors.New(1, "no actor with given ID")
 	case address.Actor:
-		return nil, fmt.Errorf("no such actor: %s", addr)
+		return nil, aerrors.Newf(1, "no such actor: %s", addr)
 	default:
-		return nil, fmt.Errorf("address has unsupported protocol: %d", addr.Protocol())
+		return nil, aerrors.Newf(1, "address has unsupported protocol: %d", addr.Protocol())
 	}
 }
 
-func NewBLSAccountActor(st *state.StateTree, addr address.Address) (*types.Actor, error) {
+func NewBLSAccountActor(st *state.StateTree, addr address.Address) (*types.Actor, aerrors.ActorError) {
 	var acstate actors.AccountActorState
 	acstate.Address = addr
 
-	c, err := st.Store.Put(context.TODO(), acstate)
+	c, err := st.Store.Put(context.TODO(), &acstate)
 	if err != nil {
-		return nil, err
+		return nil, aerrors.Escalate(err, "serializing account actor state")
 	}
 
 	nact := &types.Actor{
@@ -74,7 +73,7 @@ func NewBLSAccountActor(st *state.StateTree, addr address.Address) (*types.Actor
 	return nact, nil
 }
 
-func NewSecp256k1AccountActor(st *state.StateTree, addr address.Address) (*types.Actor, error) {
+func NewSecp256k1AccountActor(st *state.StateTree, addr address.Address) (*types.Actor, aerrors.ActorError) {
 	nact := &types.Actor{
 		Code:    actors.AccountActorCodeCid,
 		Balance: types.NewInt(0),
diff --git a/chain/vm/vm.go b/chain/vm/vm.go
index 82fc94094..0d5b21c4d 100644
--- a/chain/vm/vm.go
+++ b/chain/vm/vm.go
@@ -319,6 +319,7 @@ func (vm *VM) send(ctx context.Context, msg *types.Message, parent *VMContext,
 	toActor, err := st.GetActor(msg.To)
 	if err != nil {
 		if xerrors.Is(err, types.ErrActorNotFound) {
+			fmt.Println("actor not found on send: ", msg.To.String())
 			a, err := TryCreateAccountActor(st, msg.To)
 			if err != nil {
 				return nil, aerrors.Absorb(err, 1, "could not create account"), nil
diff --git a/cli/createminer.go b/cli/createminer.go
index cbbe4e5af..14e151a23 100644
--- a/cli/createminer.go
+++ b/cli/createminer.go
@@ -62,7 +62,7 @@ var createMinerCmd = &cli.Command{
 			return xerrors.Errorf("failed to get default address: %w", err)
 		}
 
-		params, err := actors.SerializeParams(createMinerArgs)
+		params, err := actors.SerializeParams(&createMinerArgs)
 		if err != nil {
 			return err
 		}
diff --git a/cmd/lotus-storage-miner/init.go b/cmd/lotus-storage-miner/init.go
index 741b8772f..bf81306e2 100644
--- a/cmd/lotus-storage-miner/init.go
+++ b/cmd/lotus-storage-miner/init.go
@@ -224,7 +224,7 @@ func createStorageMiner(ctx context.Context, api api.FullNode, peerid peer.ID) (
 
 	collateral := types.NewInt(1000) // TODO: Get this from params
 
-	params, err := actors.SerializeParams(actors.CreateStorageMinerParams{
+	params, err := actors.SerializeParams(&actors.CreateStorageMinerParams{
 		Owner:      defOwner,
 		Worker:     k,
 		SectorSize: types.NewInt(build.SectorSize),
diff --git a/go.mod b/go.mod
index c4aa1f5af..c9094f618 100644
--- a/go.mod
+++ b/go.mod
@@ -67,7 +67,7 @@ require (
 	github.com/polydawn/refmt v0.0.0-20190809202753-05966cbd336a
 	github.com/stretchr/testify v1.4.0
 	github.com/whyrusleeping/bencher v0.0.0-20190829221104-bb6607aa8bba
-	github.com/whyrusleeping/cbor-gen v0.0.0-20190910040623-f29470053db6
+	github.com/whyrusleeping/cbor-gen v0.0.0-20190910224804-fde80d83b106
 	github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7
 	github.com/whyrusleeping/pubsub v0.0.0-20131020042734-02de8aa2db3d
 	github.com/whyrusleeping/sharray v0.0.0-20190718051354-e41931821e33
diff --git a/go.sum b/go.sum
index f12c36d1a..5277fd12b 100644
--- a/go.sum
+++ b/go.sum
@@ -536,6 +536,8 @@ github.com/whyrusleeping/cbor-gen v0.0.0-20190910031516-c1cbffdb01bb h1:8yBVx6dg
 github.com/whyrusleeping/cbor-gen v0.0.0-20190910031516-c1cbffdb01bb/go.mod h1:xdlJQaiqipF0HW+Mzpg7XRM3fWbGvfgFlcppuvlkIvY=
 github.com/whyrusleeping/cbor-gen v0.0.0-20190910040623-f29470053db6 h1:e46mGjWNMelsw+YLq/5TyMfwGz8p0cBY2cf91y6tSBA=
 github.com/whyrusleeping/cbor-gen v0.0.0-20190910040623-f29470053db6/go.mod h1:xdlJQaiqipF0HW+Mzpg7XRM3fWbGvfgFlcppuvlkIvY=
+github.com/whyrusleeping/cbor-gen v0.0.0-20190910224804-fde80d83b106 h1:PRWDVakEjB5ju0toKWbXSExfi5BB+oU87/8GhBKXIWE=
+github.com/whyrusleeping/cbor-gen v0.0.0-20190910224804-fde80d83b106/go.mod h1:xdlJQaiqipF0HW+Mzpg7XRM3fWbGvfgFlcppuvlkIvY=
 github.com/whyrusleeping/chunker v0.0.0-20181014151217-fe64bd25879f h1:jQa4QT2UP9WYv2nzyawpKMOCl+Z/jW7djv2/J50lj9E=
 github.com/whyrusleeping/chunker v0.0.0-20181014151217-fe64bd25879f/go.mod h1:p9UJB6dDgdPgMJZs7UjUOdulKyRr9fqkS+6JKAInPy8=
 github.com/whyrusleeping/go-keyspace v0.0.0-20160322163242-5b898ac5add1 h1:EKhdznlJHPMoKr0XTrX+IlJs1LH3lyx2nfr1dOlZ79k=