付款码支付

收银员使用扫码设备读取微信用户付款码以后，二维码或条码信息会传送至商户收银台，由商户收银台或者商户后台调用该接口发起支付。 官方文档

wxpay.v3.pay.transactions.codepay.post({
  appid,
  mchid,
  description,
  out_trade_no,
  attach,
  goods_tag,
  support_fapiao,
  payer,
  amount,
  scene_info,
  detail,
  settle_info,
})
.then(
  ({ 
    data: {
      appid,
      mchid,
      out_trade_no,
      transaction_id,
      trade_type,
      bank_type,
      success_time,
      trade_state,
      trade_state_desc,
      attach,
      payer,
      amount,
      promotion_detail,
    },
  }) => ({
    appid,
    mchid,
    out_trade_no,
    transaction_id,
    trade_type,
    bank_type,
    success_time,
    trade_state,
    trade_state_desc,
    attach,
    payer,
    amount,
    promotion_detail,
  })
)