import { Api } from "https://deno.land/x/grammy@v1.32.0/mod.ts";
Once the user has confirmed their payment and shipping details, the Bot API sends the final confirmation in the form of an Update with the field pre_checkout_query. Use this method to respond to such pre-checkout queries. On success, True is returned. Note: The Bot API must receive an answer within 10 seconds after the pre-checkout query was sent.
Parameters
Specify True if everything is alright (goods are available, etc.) and the bot is ready to proceed with the order. Use False if there are any problems.
Optional remaining parameters, confer the official reference below
optional
signal: AbortSignalOptional AbortSignal
to cancel the request
Official reference: https://core.telegram.org/bots/api#answerprecheckoutquery