hyperledger/fabric · error

error getting deployment spec

Error message

error getting deployment spec

What it means

InitFromBuffer unmarshals the SignedChaincodeDeploymentSpec's inner ChaincodeDeploymentSpec bytes into a pb.ChaincodeDeploymentSpec and fails if protobuf parsing errors. This error masks the underlying parse error, indicating the signed package's inner spec bytes are corrupt or not a CDS.

Source

Thrown at core/common/ccprovider/sigcdspackage.go:241

func (ccpack *SignedCDSPackage) InitFromBuffer(buf []byte) (*ChaincodeData, error) {
	env := &common.Envelope{}
	err := proto.Unmarshal(buf, env)
	if err != nil {
		return nil, errors.New("failed to unmarshal envelope from bytes")
	}
	cHdr, sDepSpec, err := ccpackage.ExtractSignedCCDepSpec(env)
	if err != nil {
		return nil, err
	}

	if cHdr.Type != int32(common.HeaderType_CHAINCODE_PACKAGE) {
		return nil, errors.New("invalid type of envelope for chaincode package")
	}

	depSpec := &pb.ChaincodeDeploymentSpec{}
	err = proto.Unmarshal(sDepSpec.ChaincodeDeploymentSpec, depSpec)
	if err != nil {
		return nil, errors.New("error getting deployment spec")
	}

	databytes, id, data, err := ccpack.getCDSData(sDepSpec)
	if err != nil {
		return nil, err
	}

	ccpack.buf = buf
	ccpack.sDepSpec = sDepSpec
	ccpack.depSpec = depSpec
	ccpack.env = env
	ccpack.data = data
	ccpack.datab = databytes
	ccpack.id = id

	return ccpack.GetChaincodeData(), nil
}

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Regenerate the package with a matching fabric version of `peer chaincode package`/`signpackage`
2. Verify the inner spec bytes are proto.Marshal output of a populated ChaincodeDeploymentSpec
3. Re-transfer the package file and compare checksums

Example fix

// before
sDepSpec.ChaincodeDeploymentSpec = []byte(rawJSON) // wrong encoding
// after
sDepSpec.ChaincodeDeploymentSpec, _ = proto.Marshal(depSpec) // valid CDS protobuf

func validateInnerCDS(s *pb.SignedChaincodeDeploymentSpec) error {
    cds := &pb.ChaincodeDeploymentSpec{}
    if err := proto.Unmarshal(s.ChaincodeDeploymentSpec, cds); err != nil {
        return fmt.Errorf("inner deployment spec is not a valid CDS: %w", err)
    }
    if cds.ChaincodeSpec == nil { return errors.New("CDS missing ChaincodeSpec") }
    return nil
}

func hasValidInnerCDS(s *pb.SignedChaincodeDeploymentSpec) bool {
    cds := &pb.ChaincodeDeploymentSpec{}
    return s != nil && proto.Unmarshal(s.ChaincodeDeploymentSpec, cds) == nil && cds.ChaincodeSpec != nil
}

cd, err := GetCCPackage(buf, idFunc)
if err != nil {
    if strings.Contains(err.Error(), "error getting deployment spec") {
        return fmt.Errorf("corrupt inner deployment spec; repackage with a matching fabric version: %w", err)
    }
    return err
}

When it happens

Trigger: InitFromBuffer with a CHAINCODE_PACKAGE envelope whose SignedChaincodeDeploymentSpec.chaincode_deployment_spec field is not a valid serialized ChaincodeDeploymentSpec.

Common situations: Corrupted/truncated package file; custom packaging code that put the wrong bytes in the inner spec field; version skew between the tool that produced the package and the peer.

Related errors

• failed to unmarshal envelope from bytes
• failed to deserialize values
• panic(err)
• Error unmarshalling to ImplicitMetaPolicy: %s
• unknown operation type

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/ae28d9ac8acdc15f. Report an issue: GitHub.