hyperledger/fabric · error

nil payload channel header

Error message

nil payload channel header

What it means

After confirming payload.Header exists, validateProtoAndConstructTxEnv requires the ChannelHeader bytes to be non-empty. The ChannelHeader carries channel ID, tx type, and txid, all needed to construct a TxEnv; an empty one yields BAD_PAYLOAD. This precedes UnmarshalChannelHeader.

Source

Thrown at core/tx/processor_factory.go:78

	payload, err := protoutil.UnmarshalPayload(txenv.Payload)
	if err != nil {
		return nil, &tx.InvalidErr{
			ActualErr:      err,
			ValidationCode: peer.TxValidationCode_BAD_PAYLOAD,
		}
	}

	if payload.Header == nil {
		return nil, &tx.InvalidErr{
			ActualErr:      errors.New("nil payload header"),
			ValidationCode: peer.TxValidationCode_BAD_PAYLOAD,
		}
	}

	if len(payload.Header.ChannelHeader) == 0 {
		return nil, &tx.InvalidErr{
			ActualErr:      errors.New("nil payload channel header"),
			ValidationCode: peer.TxValidationCode_BAD_PAYLOAD,
		}
	}

	chdr, err := protoutil.UnmarshalChannelHeader(payload.Header.ChannelHeader)
	if err != nil {
		return nil, &tx.InvalidErr{
			ActualErr:      err,
			ValidationCode: peer.TxValidationCode_BAD_PAYLOAD,
		}
	}

	if len(payload.Header.SignatureHeader) == 0 {
		return nil, &tx.InvalidErr{
			ActualErr:      errors.New("nil payload signature header"),
			ValidationCode: peer.TxValidationCode_BAD_PAYLOAD,
		}
	}

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Marshal a populated ChannelHeader and assign it: Header.ChannelHeader = protoutil.Marshal(chdr).
2. Build headers together with protoutil.MakePayloadHeader so both sub-headers are always set.
3. Pre-check len(payload.Header.ChannelHeader) > 0 before sending.

Example fix

// before
hdr := &common.Header{SignatureHeader: shdrBytes}
// after
chdrBytes, _ := protoutil.Marshal(chdr)
hdr := &common.Header{ChannelHeader: chdrBytes, SignatureHeader: shdrBytes}

if payload.Header == nil || len(payload.Header.ChannelHeader) == 0 { return errors.New("channel header bytes missing") }

func hasChannelHeader(p *common.Payload) bool { return p != nil && p.Header != nil && len(p.Header.ChannelHeader) > 0 }

When it happens

Trigger: payload.Header = &common.Header{SignatureHeader: shdrBytes} with ChannelHeader left unset/empty — e.g. only the signature header was marshaled into the Header.

Common situations: Partial header assembly where only SignatureHeader was populated; zero-value struct initialization of common.Header; clients skipping channel-header serialization steps.

Related errors

• nil envelope payload
• nil payload header
• error unmarshalling ChaincodeHeaderExtension
• nil ChaincodeId in header extension
• nil ChaincodeId in ChaincodeAction

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/684ebf1479b1a86e. Report an issue: GitHub.