hyperledger/fabric · error

ChaincodeSpec's path cannot be empty

Error message

ChaincodeSpec's path cannot be empty

What it means

GetDeploymentPayload builds a tar.gz of the chaincode source from the spec's path. If the path (folder) is empty, there is nothing to package, so the platform returns this error instead of producing a malformed empty payload.

Source

Thrown at core/chaincode/platforms/node/platform.go:139

	}

	return nil
}

// Generates a deployment payload by putting source files in src/$file entries in .tar.gz format
func (p *Platform) GetDeploymentPayload(path string) ([]byte, error) {
	var err error

	// --------------------------------------------------------------------------------------
	// Write out our tar package
	// --------------------------------------------------------------------------------------
	payload := bytes.NewBuffer(nil)
	gw := gzip.NewWriter(payload)
	tw := tar.NewWriter(gw)

	folder := path
	if folder == "" {
		return nil, errors.New("ChaincodeSpec's path cannot be empty")
	}

	// trim trailing slash if it exists
	if folder[len(folder)-1] == '/' {
		folder = folder[:len(folder)-1]
	}

	logger.Debugf("Packaging node.js project from path %s", folder)

	if err = util.WriteFolderToTarPackage(tw, folder, []string{"node_modules"}, nil, nil); err != nil {
		logger.Errorf("Error writing folder to tar package %s", err)
		return nil, fmt.Errorf("Error writing Chaincode package contents: %s", err)
	}

	// Write the tar file out
	if err := tw.Close(); err != nil {
		return nil, fmt.Errorf("Error writing Chaincode package contents: %s", err)
	}

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Set ChaincodeSpec.Path to the chaincode source directory (e.g. 'github.com/example/chaincode/node' or the local path being packaged).
2. Validate the spec path before calling packaging APIs.
3. If loading from JSON/config, ensure the path field is populated and non-empty.
4. Re-run the packaging step after fixing the spec.

Example fix

// before
spec := &pb.ChaincodeSpec{Type: pb.ChaincodeSpec_NODE}
// after
spec := &pb.ChaincodeSpec{Type: pb.ChaincodeSpec_NODE, ChaincodeId: &pb.ChaincodeID{Path: "src/chaincode"}}

if (!spec.ChaincodeId || !spec.ChaincodeId.Path) {
  throw new Error('ChaincodeSpec.Path must be set before packaging');
}

function hasChaincodePath(spec) {
  return !!spec && !!spec.ChaincodeId && typeof spec.ChaincodeId.Path === 'string' && spec.ChaincodeId.Path.length > 0;
}

When it happens

Trigger: Calling GetDeploymentPayload (directly or via chaincode spec packaging) with ccSpec.Path == "" — e.g. an unset ChaincodeSpec path field or a spec constructed programmatically without setting the source path.

Common situations: Building a ChaincodeSpec struct and forgetting the Path field, path lost during JSON deserialization, or copying a spec template that left path blank for node chaincode.

Related errors

• did not find a code package inside the package
• illegal file detected in payload: "%s"
• illegal file detected in payload: "%s"
• illegal file mode detected for file %s: %o
• no package.json found at the root of the chaincode package

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/4eae42140825104c. Report an issue: GitHub.