I can't figure out how to check a transaction not through a file?

Question

API

There is a telegram bot script where the balance replenishment is checked through comments in. After replenishment, the transaction number is written to the transactions. The problem is that the hosting does not allow files to be changed after uploading. And now help to redo the replenishment check without a file. Qiwi api using Here is the code

setInterval(async () => {
  wallet.getOperationHistory({
    rows: 1,
    operation: "IN"
  }, async (err, res) => {
    res.data.map(async (operation) => {
      if(transactions.indexOf(operation.txnId) !== -1) return;

      if(!operation.comment) return;
      if(!operation.comment.startsWith("promotions")) return;

      let user = await User.findOne({ id: Number(operation.comment.split("promotions")[1]) });
      if(!user) return;

      await user.inc("balance", operation.sum.amount);
      await user.set("verify", true);
      
      bot.sendMessage(user.id, Вы пополнили свой баланс на ${operation.sum.amount}р);

      transactions.push(operation.txnId);
      require("fs").writeFileSync("./transactions.json", JSON.stringify(transactions, null, "\t"));
    });
  });
}, 30000);