data ReadFileResult:
    -- Was the call successful or not
    success: bool
    -- File content in base64 if the call was successful
    content: ?string
    --  Error message if the call was unsuccessful
    error: ?string

service NodeUtils("node_utils"):
    -- Read file from file system.
    --   returns file content in base64 format
    read_file(path: string) -> ReadFileResult