Allow users to pay to schedule "blockstamp" via lightning #15
Description
The whole idea is to allow users to schedule a Bitcoin transaction (including an OP_RETURN containing their "stamp") at the date of their choosing.
In order to accomplish this, Bitcoin transaction fees must be taken into account and passed on to the user. Additionally, a service fee will be passed on to the user as well.
Ideally, I'd like to implement Lightning as a way to receive this fee from the user.
The flow would look like this:
- user arrives at website
- user enters a date in the future specifically (a date in the past will just return the corresponding blockheight)
- upon submission of the future date, the user is presented with an estimated blockheight (target blockheight) and a form to enter the "stamp" they would like to add to the blockchain
- once the user submits their "stamp", they will be given a lightning invoice
- upon payment, the "target blockheight" and the "stamp" will be added to the database
- the site will then be responsible for monitoring the database and building, signing and sending the Bitcoin transaction at the user-chosen "target blockheight", which will include the OP_RETURN containing the "stamp"
I don't have much experience with this, so open to suggestions.