def signed(pvt, id)
      t = clone
      t.sign = Signature.new.sign(pvt, id, self)
      t
    end
def signed(pvt, id)
      t = clone
      t.sign = Signature.new.sign(pvt, id, self)
      t
    end
def signed ( pvt , id ) t = clone t . sign = Signature . new . sign ( pvt , id , self ) t end
Sign the transaction and add RSA signature to it
 +pvt+:: The private RSA key of the paying wallet
 +id+:: Paying wallet ID
Sign the transaction and add RSA signature to it + pvt + :: The private RSA key of the paying wallet + id + :: Paying wallet ID