def script_sig=(blob)
      # This is only a setter because of the initial choice to do things
      # eagerly.  Can become an attr_accessor when we move to lazy eval.
      script = Script.new(:blob => blob)
      @script_sig = script.to_s
      @native.script_sig = blob
    end
def script_sig=(blob)
      # This is only a setter because of the initial choice to do things
      # eagerly.  Can become an attr_accessor when we move to lazy eval.
      script = Script.new(:blob => blob)
      @script_sig = script.to_s
      @native.script_sig = blob
    end
Set the scriptSig for this input using a string of bytes.