feat: events: version the MessageReceipt structure. (#9636)

chain/events/filter/event_test.go

@@ -344,12 +344,8 @@ func fakeReceipt(tb testing.TB, rng *pseudo.Rand, st adt.Store, events []*types.
 	eventsRoot, err := arr.Root()
 	require.NoError(tb, err, "flush events amt")
 
-	return &types.MessageReceipt{
-		ExitCode: exitcode.Ok,
-		Return:   randomBytes(32, rng),
-		GasUsed:  rng.Int63(),
-		Events:   eventsRoot,
-	}
+	rec := types.NewMessageReceiptV1(exitcode.Ok, randomBytes(32, rng), rng.Int63(), &eventsRoot)
+	return &rec
 }
 
 func fakeTipSet(tb testing.TB, rng *pseudo.Rand, h abi.ChainEpoch, parents []cid.Cid) *types.TipSet {

chain/types/cbor_gen.go

@@ -15,7 +15,6 @@ import (
 	address "github.com/filecoin-project/go-address"
 	abi "github.com/filecoin-project/go-state-types/abi"
 	crypto "github.com/filecoin-project/go-state-types/crypto"
-	exitcode "github.com/filecoin-project/go-state-types/exitcode"
 	proof "github.com/filecoin-project/go-state-types/proof"
 )
 
@@ -1289,189 +1288,6 @@ func (t *ActorV5) UnmarshalCBOR(r io.Reader) (err error) {
 	return nil
 }
 
-var lengthBufMessageReceipt = []byte{132}
-
-func (t *MessageReceipt) MarshalCBOR(w io.Writer) error {
-	if t == nil {
-		_, err := w.Write(cbg.CborNull)
-		return err
-	}
-
-	cw := cbg.NewCborWriter(w)
-
-	if _, err := cw.Write(lengthBufMessageReceipt); err != nil {
-		return err
-	}
-
-	// t.ExitCode (exitcode.ExitCode) (int64)
-	if t.ExitCode >= 0 {
-		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.ExitCode)); err != nil {
-			return err
-		}
-	} else {
-		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.ExitCode-1)); err != nil {
-			return err
-		}
-	}
-
-	// t.Return ([]uint8) (slice)
-	if len(t.Return) > cbg.ByteArrayMaxLen {
-		return xerrors.Errorf("Byte array in field t.Return was too long")
-	}
-
-	if err := cw.WriteMajorTypeHeader(cbg.MajByteString, uint64(len(t.Return))); err != nil {
-		return err
-	}
-
-	if _, err := cw.Write(t.Return[:]); err != nil {
-		return err
-	}
-
-	// t.GasUsed (int64) (int64)
-	if t.GasUsed >= 0 {
-		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.GasUsed)); err != nil {
-			return err
-		}
-	} else {
-		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.GasUsed-1)); err != nil {
-			return err
-		}
-	}
-
-	// t.EventsRoot (cid.Cid) (struct)
-
-	if t.EventsRoot == nil {
-		if _, err := cw.Write(cbg.CborNull); err != nil {
-			return err
-		}
-	} else {
-		if err := cbg.WriteCid(cw, *t.EventsRoot); err != nil {
-			return xerrors.Errorf("failed to write cid field t.EventsRoot: %w", err)
-		}
-	}
-
-	return nil
-}
-
-func (t *MessageReceipt) UnmarshalCBOR(r io.Reader) (err error) {
-	*t = MessageReceipt{}
-
-	cr := cbg.NewCborReader(r)
-
-	maj, extra, err := cr.ReadHeader()
-	if err != nil {
-		return err
-	}
-	defer func() {
-		if err == io.EOF {
-			err = io.ErrUnexpectedEOF
-		}
-	}()
-
-	if maj != cbg.MajArray {
-		return fmt.Errorf("cbor input should be of type array")
-	}
-
-	if extra != 4 {
-		return fmt.Errorf("cbor input had wrong number of fields")
-	}
-
-	// t.ExitCode (exitcode.ExitCode) (int64)
-	{
-		maj, extra, err := cr.ReadHeader()
-		var extraI int64
-		if err != nil {
-			return err
-		}
-		switch maj {
-		case cbg.MajUnsignedInt:
-			extraI = int64(extra)
-			if extraI < 0 {
-				return fmt.Errorf("int64 positive overflow")
-			}
-		case cbg.MajNegativeInt:
-			extraI = int64(extra)
-			if extraI < 0 {
-				return fmt.Errorf("int64 negative oveflow")
-			}
-			extraI = -1 - extraI
-		default:
-			return fmt.Errorf("wrong type for int64 field: %d", maj)
-		}
-
-		t.ExitCode = exitcode.ExitCode(extraI)
-	}
-	// t.Return ([]uint8) (slice)
-
-	maj, extra, err = cr.ReadHeader()
-	if err != nil {
-		return err
-	}
-
-	if extra > cbg.ByteArrayMaxLen {
-		return fmt.Errorf("t.Return: byte array too large (%d)", extra)
-	}
-	if maj != cbg.MajByteString {
-		return fmt.Errorf("expected byte array")
-	}
-
-	if extra > 0 {
-		t.Return = make([]uint8, extra)
-	}
-
-	if _, err := io.ReadFull(cr, t.Return[:]); err != nil {
-		return err
-	}
-	// t.GasUsed (int64) (int64)
-	{
-		maj, extra, err := cr.ReadHeader()
-		var extraI int64
-		if err != nil {
-			return err
-		}
-		switch maj {
-		case cbg.MajUnsignedInt:
-			extraI = int64(extra)
-			if extraI < 0 {
-				return fmt.Errorf("int64 positive overflow")
-			}
-		case cbg.MajNegativeInt:
-			extraI = int64(extra)
-			if extraI < 0 {
-				return fmt.Errorf("int64 negative oveflow")
-			}
-			extraI = -1 - extraI
-		default:
-			return fmt.Errorf("wrong type for int64 field: %d", maj)
-		}
-
-		t.GasUsed = int64(extraI)
-	}
-	// t.EventsRoot (cid.Cid) (struct)
-
-	{
-
-		b, err := cr.ReadByte()
-		if err != nil {
-			return err
-		}
-		if b != cbg.CborNull[0] {
-			if err := cr.UnreadByte(); err != nil {
-				return err
-			}
-
-			c, err := cbg.ReadCid(cr)
-			if err != nil {
-				return xerrors.Errorf("failed to read cid field t.EventsRoot: %w", err)
-			}
-
-			t.EventsRoot = &c
-		}
-
-	}
-	return nil
-}
-
 var lengthBufBlockMsg = []byte{131}
 
 func (t *BlockMsg) MarshalCBOR(w io.Writer) error {

chain/types/message_receipt.go

@@ -8,14 +8,52 @@ import (
 	"github.com/filecoin-project/go-state-types/exitcode"
 )
 
+type MessageReceiptVersion byte
+
+const (
+	// MessageReceiptV0 refers to pre FIP-0049 receipts.
+	MessageReceiptV0 MessageReceiptVersion = 0
+	// MessageReceiptV1 refers to post FIP-0049 receipts.
+	MessageReceiptV1 MessageReceiptVersion = 1
+)
+
 type MessageReceipt struct {
+	version MessageReceiptVersion
+
 	ExitCode   exitcode.ExitCode
 	Return     []byte
 	GasUsed    int64
 	EventsRoot *cid.Cid // Root of Event AMT
 }
 
+// NewMessageReceiptV0 creates a new pre FIP-0049 receipt with no capability to
+// convey events.
+func NewMessageReceiptV0(exitcode exitcode.ExitCode, ret []byte, gasUsed int64) MessageReceipt {
+	return MessageReceipt{
+		version:  MessageReceiptV0,
+		ExitCode: exitcode,
+		Return:   ret,
+		GasUsed:  gasUsed,
+	}
+}
+
+// NewMessageReceiptV1 creates a new pre FIP-0049 receipt with the ability to
+// convey events.
+func NewMessageReceiptV1(exitcode exitcode.ExitCode, ret []byte, gasUsed int64, eventsRoot *cid.Cid) MessageReceipt {
+	return MessageReceipt{
+		version:    MessageReceiptV1,
+		ExitCode:   exitcode,
+		Return:     ret,
+		GasUsed:    gasUsed,
+		EventsRoot: eventsRoot,
+	}
+}
+
+func (mr *MessageReceipt) Version() MessageReceiptVersion {
+	return mr.version
+}
+
 func (mr *MessageReceipt) Equals(o *MessageReceipt) bool {
-	return mr.ExitCode == o.ExitCode && bytes.Equal(mr.Return, o.Return) && mr.GasUsed == o.GasUsed &&
+	return mr.version == mr.version && mr.ExitCode == o.ExitCode && bytes.Equal(mr.Return, o.Return) && mr.GasUsed == o.GasUsed &&
 		(mr.EventsRoot == o.EventsRoot || (mr.EventsRoot != nil && o.EventsRoot != nil && *mr.EventsRoot == *o.EventsRoot))
 }

chain/types/message_receipt_cbor.go

@@ -0,0 +1,359 @@
+package types
+
+import (
+	"fmt"
+	"io"
+
+	cbg "github.com/whyrusleeping/cbor-gen"
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/go-state-types/cbor"
+	"github.com/filecoin-project/go-state-types/exitcode"
+)
+
+// This file contains custom CBOR serde logic to deal with the new versioned
+// MessageReceipt resulting from the introduction of actor events (FIP-0049).
+
+type messageReceiptV0 struct{ *MessageReceipt }
+
+type messageReceiptV1 struct{ *MessageReceipt }
+
+func (mr *MessageReceipt) MarshalCBOR(w io.Writer) error {
+	if mr == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+
+	var m cbor.Marshaler
+	switch mr.version {
+	case MessageReceiptV0:
+		m = &messageReceiptV0{mr}
+	case MessageReceiptV1:
+		m = &messageReceiptV1{mr}
+	default:
+		return xerrors.Errorf("invalid message receipt version: %d", mr.version)
+	}
+
+	return m.MarshalCBOR(w)
+}
+
+func (mr *MessageReceipt) UnmarshalCBOR(r io.Reader) (err error) {
+	*mr = MessageReceipt{}
+
+	cr := cbg.NewCborReader(r)
+
+	maj, extra, err := cr.ReadHeader()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err == io.EOF {
+			err = io.ErrUnexpectedEOF
+		}
+	}()
+
+	if maj != cbg.MajArray {
+		return fmt.Errorf("cbor input should be of type array")
+	}
+
+	var u cbor.Unmarshaler
+	switch extra {
+	case 3:
+		mr.version = MessageReceiptV0
+		u = &messageReceiptV0{mr}
+	case 4:
+		mr.version = MessageReceiptV1
+		u = &messageReceiptV1{mr}
+	default:
+		return fmt.Errorf("cbor input had wrong number of fields")
+	}
+
+	// Ok to pass a CBOR reader since cbg.NewCborReader will return itself when
+	// already a CBOR reader.
+	return u.UnmarshalCBOR(cr)
+}
+
+var lengthBufAMessageReceiptV0 = []byte{131}
+
+func (t *messageReceiptV0) MarshalCBOR(w io.Writer) error {
+	// eliding null check since nulls were already handled in the dispatcher
+
+	cw := cbg.NewCborWriter(w)
+
+	if _, err := cw.Write(lengthBufAMessageReceiptV0); err != nil {
+		return err
+	}
+
+	// t.ExitCode (exitcode.ExitCode) (int64)
+	if t.ExitCode >= 0 {
+		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.ExitCode)); err != nil {
+			return err
+		}
+	} else {
+		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.ExitCode-1)); err != nil {
+			return err
+		}
+	}
+
+	// t.Return ([]uint8) (slice)
+	if len(t.Return) > cbg.ByteArrayMaxLen {
+		return xerrors.Errorf("Byte array in field t.Return was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajByteString, uint64(len(t.Return))); err != nil {
+		return err
+	}
+
+	if _, err := cw.Write(t.Return[:]); err != nil {
+		return err
+	}
+
+	// t.GasUsed (int64) (int64)
+	if t.GasUsed >= 0 {
+		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.GasUsed)); err != nil {
+			return err
+		}
+	} else {
+		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.GasUsed-1)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (t *messageReceiptV0) UnmarshalCBOR(r io.Reader) (err error) {
+	cr := cbg.NewCborReader(r)
+
+	// t.ExitCode (exitcode.ExitCode) (int64)
+	{
+		maj, extra, err := cr.ReadHeader()
+		var extraI int64
+		if err != nil {
+			return err
+		}
+		switch maj {
+		case cbg.MajUnsignedInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 positive overflow")
+			}
+		case cbg.MajNegativeInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 negative oveflow")
+			}
+			extraI = -1 - extraI
+		default:
+			return fmt.Errorf("wrong type for int64 field: %d", maj)
+		}
+
+		t.ExitCode = exitcode.ExitCode(extraI)
+	}
+	// t.Return ([]uint8) (slice)
+
+	maj, extra, err := cr.ReadHeader()
+	if err != nil {
+		return err
+	}
+
+	if extra > cbg.ByteArrayMaxLen {
+		return fmt.Errorf("t.Return: byte array too large (%d)", extra)
+	}
+	if maj != cbg.MajByteString {
+		return fmt.Errorf("expected byte array")
+	}
+
+	if extra > 0 {
+		t.Return = make([]uint8, extra)
+	}
+
+	if _, err := io.ReadFull(cr, t.Return[:]); err != nil {
+		return err
+	}
+	// t.GasUsed (int64) (int64)
+	{
+		maj, extra, err := cr.ReadHeader()
+		var extraI int64
+		if err != nil {
+			return err
+		}
+		switch maj {
+		case cbg.MajUnsignedInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 positive overflow")
+			}
+		case cbg.MajNegativeInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 negative oveflow")
+			}
+			extraI = -1 - extraI
+		default:
+			return fmt.Errorf("wrong type for int64 field: %d", maj)
+		}
+
+		t.GasUsed = extraI
+	}
+	return nil
+}
+
+var lengthBufBMessageReceiptV1 = []byte{132}
+
+func (t *messageReceiptV1) MarshalCBOR(w io.Writer) error {
+	// eliding null check since nulls were already handled in the dispatcher
+
+	cw := cbg.NewCborWriter(w)
+
+	if _, err := cw.Write(lengthBufBMessageReceiptV1); err != nil {
+		return err
+	}
+
+	// t.ExitCode (exitcode.ExitCode) (int64)
+	if t.ExitCode >= 0 {
+		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.ExitCode)); err != nil {
+			return err
+		}
+	} else {
+		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.ExitCode-1)); err != nil {
+			return err
+		}
+	}
+
+	// t.Return ([]uint8) (slice)
+	if len(t.Return) > cbg.ByteArrayMaxLen {
+		return xerrors.Errorf("Byte array in field t.Return was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajByteString, uint64(len(t.Return))); err != nil {
+		return err
+	}
+
+	if _, err := cw.Write(t.Return[:]); err != nil {
+		return err
+	}
+
+	// t.GasUsed (int64) (int64)
+	if t.GasUsed >= 0 {
+		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.GasUsed)); err != nil {
+			return err
+		}
+	} else {
+		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.GasUsed-1)); err != nil {
+			return err
+		}
+	}
+
+	// t.EventsRoot (cid.Cid) (struct)
+
+	if t.EventsRoot == nil {
+		if _, err := cw.Write(cbg.CborNull); err != nil {
+			return err
+		}
+	} else {
+		if err := cbg.WriteCid(cw, *t.EventsRoot); err != nil {
+			return xerrors.Errorf("failed to write cid field t.EventsRoot: %w", err)
+		}
+	}
+
+	return nil
+}
+
+func (t *messageReceiptV1) UnmarshalCBOR(r io.Reader) (err error) {
+	cr := cbg.NewCborReader(r)
+
+	// t.ExitCode (exitcode.ExitCode) (int64)
+	{
+		maj, extra, err := cr.ReadHeader()
+		var extraI int64
+		if err != nil {
+			return err
+		}
+		switch maj {
+		case cbg.MajUnsignedInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 positive overflow")
+			}
+		case cbg.MajNegativeInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 negative oveflow")
+			}
+			extraI = -1 - extraI
+		default:
+			return fmt.Errorf("wrong type for int64 field: %d", maj)
+		}
+
+		t.ExitCode = exitcode.ExitCode(extraI)
+	}
+	// t.Return ([]uint8) (slice)
+
+	maj, extra, err := cr.ReadHeader()
+	if err != nil {
+		return err
+	}
+
+	if extra > cbg.ByteArrayMaxLen {
+		return fmt.Errorf("t.Return: byte array too large (%d)", extra)
+	}
+	if maj != cbg.MajByteString {
+		return fmt.Errorf("expected byte array")
+	}
+
+	if extra > 0 {
+		t.Return = make([]uint8, extra)
+	}
+
+	if _, err := io.ReadFull(cr, t.Return[:]); err != nil {
+		return err
+	}
+	// t.GasUsed (int64) (int64)
+	{
+		maj, extra, err := cr.ReadHeader()
+		var extraI int64
+		if err != nil {
+			return err
+		}
+		switch maj {
+		case cbg.MajUnsignedInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 positive overflow")
+			}
+		case cbg.MajNegativeInt:
+			extraI = int64(extra)
+			if extraI < 0 {
+				return fmt.Errorf("int64 negative oveflow")
+			}
+			extraI = -1 - extraI
+		default:
+			return fmt.Errorf("wrong type for int64 field: %d", maj)
+		}
+
+		t.GasUsed = extraI
+	}
+	// t.EventsRoot (cid.Cid) (struct)
+
+	{
+
+		b, err := cr.ReadByte()
+		if err != nil {
+			return err
+		}
+		if b != cbg.CborNull[0] {
+			if err := cr.UnreadByte(); err != nil {
+				return err
+			}
+
+			c, err := cbg.ReadCid(cr)
+			if err != nil {
+				return xerrors.Errorf("failed to read cid field t.EventsRoot: %w", err)
+			}
+
+			t.EventsRoot = &c
+		}
+
+	}
+	return nil
+}

chain/types/message_receipt_test.go

@@ -0,0 +1,75 @@
+package types
+
+import (
+	"bytes"
+	"encoding/hex"
+	"testing"
+
+	"github.com/ipfs/go-cid"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMessageReceiptSerdeRoundrip(t *testing.T) {
+	var (
+		assert = assert.New(t)
+		buf    = new(bytes.Buffer)
+		err    error
+	)
+
+	randomCid, err := cid.Decode("bafy2bzacecu7n7wbtogznrtuuvf73dsz7wasgyneqasksdblxupnyovmtwxxu")
+	assert.NoError(err)
+
+	//
+	// Version 0
+	//
+	mr := NewMessageReceiptV0(0, []byte{0x00, 0x01, 0x02, 0x04}, 42)
+
+	// marshal
+	err = mr.MarshalCBOR(buf)
+	assert.NoError(err)
+
+	t.Logf("version 0: %s\n", hex.EncodeToString(buf.Bytes()))
+
+	// unmarshal
+	var mr2 MessageReceipt
+	err = mr2.UnmarshalCBOR(buf)
+	assert.NoError(err)
+	assert.Equal(mr, mr2)
+
+	// version 0 with an events root -- should not serialize the events root!
+	mr.EventsRoot = &randomCid
+
+	buf.Reset()
+
+	// marshal
+	err = mr.MarshalCBOR(buf)
+	assert.NoError(err)
+
+	t.Logf("version 0 (with root): %s\n", hex.EncodeToString(buf.Bytes()))
+
+	// unmarshal
+	mr2 = MessageReceipt{}
+	err = mr2.UnmarshalCBOR(buf)
+	assert.NoError(err)
+	assert.NotEqual(mr, mr2)
+	assert.Nil(mr2.EventsRoot)
+
+	//
+	// Version 1
+	//
+	buf.Reset()
+	mr = NewMessageReceiptV1(0, []byte{0x00, 0x01, 0x02, 0x04}, 42, &randomCid)
+
+	// marshal
+	err = mr.MarshalCBOR(buf)
+	assert.NoError(err)
+
+	t.Logf("version 1: %s\n", hex.EncodeToString(buf.Bytes()))
+
+	// unmarshal
+	mr2 = MessageReceipt{}
+	err = mr2.UnmarshalCBOR(buf)
+	assert.NoError(err)
+	assert.Equal(mr, mr2)
+	assert.NotNil(mr2.EventsRoot)
+}

chain/vm/fvm.go

@@ -23,6 +23,7 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	actorstypes "github.com/filecoin-project/go-state-types/actors"
 	"github.com/filecoin-project/go-state-types/exitcode"
+	"github.com/filecoin-project/go-state-types/network"
 
 	"github.com/filecoin-project/lotus/blockstore"
 	"github.com/filecoin-project/lotus/build"
@@ -275,6 +276,7 @@ func (x *FvmExtern) workerKeyAtLookback(ctx context.Context, minerId address.Add
 
 type FVM struct {
 	fvm *ffi.FVM
+	nv  network.Version
 }
 
 func defaultFVMOpts(ctx context.Context, opts *VMOpts) (*ffi.FVMOpts, error) {
@@ -337,6 +339,7 @@ func NewFVM(ctx context.Context, opts *VMOpts) (*FVM, error) {
 
 	return &FVM{
 		fvm: fvm,
+		nv:  opts.NetworkVersion,
 	}, nil
 }
 
@@ -439,6 +442,7 @@ func NewDebugFVM(ctx context.Context, opts *VMOpts) (*FVM, error) {
 
 	return &FVM{
 		fvm: fvm,
+		nv:  opts.NetworkVersion,
 	}, nil
 }
 
@@ -457,10 +461,12 @@ func (vm *FVM) ApplyMessage(ctx context.Context, cmsg types.ChainMsg) (*ApplyRet
 	}
 
 	duration := time.Since(start)
-	receipt := types.MessageReceipt{
-		Return:   ret.Return,
-		ExitCode: exitcode.ExitCode(ret.ExitCode),
-		GasUsed:  ret.GasUsed,
+
+	var receipt types.MessageReceipt
+	if vm.nv >= network.Version18 {
+		receipt = types.NewMessageReceiptV1(exitcode.ExitCode(ret.ExitCode), ret.Return, ret.GasUsed, ret.EventsRoot)
+	} else {
+		receipt = types.NewMessageReceiptV0(exitcode.ExitCode(ret.ExitCode), ret.Return, ret.GasUsed)
 	}
 
 	var aerr aerrors.ActorError
@@ -521,10 +527,12 @@ func (vm *FVM) ApplyImplicitMessage(ctx context.Context, cmsg *types.Message) (*
 	}
 
 	duration := time.Since(start)
-	receipt := types.MessageReceipt{
-		Return:   ret.Return,
-		ExitCode: exitcode.ExitCode(ret.ExitCode),
-		GasUsed:  ret.GasUsed,
+
+	var receipt types.MessageReceipt
+	if vm.nv >= network.Version18 {
+		receipt = types.NewMessageReceiptV1(exitcode.ExitCode(ret.ExitCode), ret.Return, ret.GasUsed, ret.EventsRoot)
+	} else {
+		receipt = types.NewMessageReceiptV0(exitcode.ExitCode(ret.ExitCode), ret.Return, ret.GasUsed)
 	}
 
 	var aerr aerrors.ActorError

gen/main.go

@@ -28,7 +28,7 @@ func main() {
 		types.MsgMeta{},
 		types.ActorV4{},
 		types.ActorV5{},
-		types.MessageReceipt{},
+		// types.MessageReceipt{}, // Custom serde to deal with versioning.
 		types.BlockMsg{},
 		types.ExpTipSet{},
 		types.BeaconEntry{},