d_signing_payload'>signing_payload</span> <span class='op'>=</span> <span class='kw'>nil</span>
  <span class='kw'>end</span>

  <span class='kw'>if</span> <span class='id identifier rubyid_attributes'>attributes</span><span class='period'>.</span><span class='id identifier rubyid_key?'>key?</span><span class='lparen'>(</span><span class='symbol'>:&#39;transaction_type&#39;</span><span class='rparen'>)</span>
    <span class='kw'>self</span><span class='period'>.</span><span class='id identifier rubyid_tran