CallFunction will invoke the custom function on the runtime node server.

CallJob will invoke the job function on the runtime node server.

CallSubscriber will invoke the subscriber function on the runtime node server.

FunctionsRuntimeError follows the error object specification from the JSONRPC spec: https://www.jsonrpc.org/specification#error_object.

Custom error codes returned from custom function runtime See packages/functions-runtime for original definition and more info.