hyperledger/fabric · error

error unmarshalling ChannelHeader

Error message

error unmarshalling ChannelHeader

What it means

Generic sentinel wrap in protoutil.UnmarshalChannelHeader: proto.Unmarshal failed to decode the input bytes into a common.ChannelHeader. It fires when callers (config bundle loading, envelope parsing, block verification, config updates) feed bytes that are not actually a serialized ChannelHeader — truncated, wrong-type, or corrupt payload data.

Source

Thrown at protoutil/unmarshalers.go:61

// UnmarshalPayload unmarshals bytes to a Payload
func UnmarshalPayload(encoded []byte) (*common.Payload, error) {
	payload := &common.Payload{}
	err := proto.Unmarshal(encoded, payload)
	return payload, errors.Wrap(err, "error unmarshalling Payload")
}

// UnmarshalEnvelope unmarshals bytes to a Envelope
func UnmarshalEnvelope(encoded []byte) (*common.Envelope, error) {
	envelope := &common.Envelope{}
	err := proto.Unmarshal(encoded, envelope)
	return envelope, errors.Wrap(err, "error unmarshalling Envelope")
}

// UnmarshalChannelHeader unmarshals bytes to a ChannelHeader
func UnmarshalChannelHeader(bytes []byte) (*common.ChannelHeader, error) {
	chdr := &common.ChannelHeader{}
	err := proto.Unmarshal(bytes, chdr)
	return chdr, errors.Wrap(err, "error unmarshalling ChannelHeader")
}

// UnmarshalChaincodeID unmarshals bytes to a ChaincodeID
func UnmarshalChaincodeID(bytes []byte) (*peer.ChaincodeID, error) {
	ccid := &peer.ChaincodeID{}
	err := proto.Unmarshal(bytes, ccid)
	return ccid, errors.Wrap(err, "error unmarshalling ChaincodeID")
}

// UnmarshalSignatureHeader unmarshals bytes to a SignatureHeader
func UnmarshalSignatureHeader(bytes []byte) (*common.SignatureHeader, error) {
	sh := &common.SignatureHeader{}
	err := proto.Unmarshal(bytes, sh)
	return sh, errors.Wrap(err, "error unmarshalling SignatureHeader")
}

// UnmarshalIdentifierHeader unmarshals bytes to an IdentifierHeader
func UnmarshalIdentifierHeader(bytes []byte) (*common.IdentifierHeader, error) {

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Reject the message with the malformed channel header
2. Check for client SDK version incompatibilities

When it happens

Trigger: Thrown at protoutil/unmarshalers.go:61 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/39bcf03fbb84f480. Report an issue: GitHub.