hyperledger/fabric · error

error marshaling ChaincodeActionPayload

Error message

error marshaling ChaincodeActionPayload

What it means

This is the wrapped error from proto.Marshal inside GetBytesChaincodeActionPayload when serialization of a non-nil payload fails. errors.Wrap appends the 'error marshaling ChaincodeActionPayload' context to the underlying proto error.

Source

Thrown at protoutil/proputils.go:168

}

// GetBytesChaincodeEvent gets the bytes of ChaincodeEvent
func GetBytesChaincodeEvent(event *peer.ChaincodeEvent) ([]byte, error) {
	if event == nil {
		return nil, errors.New("error marshaling ChaincodeEvent: proto: Marshal called with nil")
	}
	eventBytes, err := proto.Marshal(event)
	return eventBytes, errors.Wrap(err, "error marshaling ChaincodeEvent")
}

// GetBytesChaincodeActionPayload get the bytes of ChaincodeActionPayload from
// the message
func GetBytesChaincodeActionPayload(cap *peer.ChaincodeActionPayload) ([]byte, error) {
	if cap == nil {
		return nil, errors.New("error marshaling ChaincodeActionPayload: proto: Marshal called with nil")
	}
	capBytes, err := proto.Marshal(cap)
	return capBytes, errors.Wrap(err, "error marshaling ChaincodeActionPayload")
}

// GetBytesProposalResponse gets proposal bytes response
func GetBytesProposalResponse(pr *peer.ProposalResponse) ([]byte, error) {
	if pr == nil {
		return nil, errors.New("error marshaling ProposalResponse: proto: Marshal called with nil")
	}
	respBytes, err := proto.Marshal(pr)
	return respBytes, errors.Wrap(err, "error marshaling ProposalResponse")
}

// GetBytesHeader get the bytes of Header from the message
func GetBytesHeader(hdr *common.Header) ([]byte, error) {
	if hdr == nil {
		return nil, errors.New("error marshaling Header: proto: Marshal called with nil")
	}
	bytes, err := proto.Marshal(hdr)
	return bytes, errors.Wrap(err, "error marshaling Header")

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Use errors.Cause(err) to surface the root proto error.
2. Align versions of github.com/hyperledger/fabric-protos-go and gogo/protobuf in go.mod, then rebuild.
3. Rebuild the payload from a parsed ProposalResponse instead of manual field assembly.
4. If the pointer was actually nil, apply the nil guard from the 'Marshal called with nil' variant.

Example fix

// before
capBytes, err := protoutil.GetBytesChaincodeActionPayload(cap)
if err != nil {
    return nil, err
}
// after
capBytes, err := protoutil.GetBytesChaincodeActionPayload(cap)
if err != nil {
    return nil, errors.Wrap(errors.Cause(err), "cannot serialize ChaincodeActionPayload")
}

if cap == nil {
    return nil, errors.New("ChaincodeActionPayload is nil")
}

func isSerializableCAP(cap *peer.ChaincodeActionPayload) bool {
    return cap != nil
}

capBytes, err := protoutil.GetBytesChaincodeActionPayload(cap)
if err != nil {
    return nil, errors.Wrap(errors.Cause(err), "ChaincodeActionPayload serialization failed")
}

When it happens

Trigger: proto.Marshal failing on a non-nil *peer.ChaincodeActionPayload — typically an inconsistent proto runtime/codegen pair or a struct built from invalid decoded bytes rather than through the generated API.

Common situations: Version skew between fabric-protos-go and the proto/gogo runtime after a dependency upgrade, corrupted transaction payloads parsed from untrusted input.

Related errors

• error marshaling Response
• error marshaling ChaincodeEvent
• error marshaling ChaincodeActionPayload: proto: Marshal call
• error marshaling ProposalResponse
• error marshaling Header

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/46f55b1d57cae124. Report an issue: GitHub.