--- Log opened Tue Jan 14 00:00:06 2020
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11:47 < jodobear> Hi all!
11:48 < jodobear> I am building a webapp where i need the users to deposit and be able to withdraw whatever balance they have. I don't have much experience with LN and this is what i have till now:I want to use BTCPay Server with c-lightning but, all the examples i have seen till now only implement users paying to the service but, none with a withdrawal system. On
11:48 < jodobear> the BTCPay chat i was told c-lightning can do that.Can anyone help how can i implement the following using c-lightning:1. User Deposits funds into the app.2. User Withdraws balance from the app.3. Ability to authenticate user using LNURL.Another question: How can i use LNURL with c-lightning, do i even need it since c-lightning has it's own API.
11:48 < jodobear> Though LNURL has much more extensive usecases.
11:51 < jodobear> sorry about that un-formatted message
11:52 < jodobear> I am building a webapp where i need the users to deposit and be able to withdraw whatever balance they have. I don't have much experience with LN and this is what i have till now:
11:52 < jodobear> I want to use BTCPay Server with c-lightning but, all the examples i have seen till now only implement users paying to the service but, none with a withdrawal system. On the BTCPay chat i was told c-lightning can do that.
11:52 < jodobear> Can anyone help how can i implement the following using c-lightning:
11:52 < jodobear> 1. User Deposits funds into the app.
11:52 < jodobear> 2. User Withdraws balance from the app.
11:52 < jodobear> 3. Ability to authenticate user using LNURL.
11:52 < jodobear> Another question: How can i use LNURL with c-lightning, do i even need it since c-lightning has it's own API. Though LNURL has much more extensive usecases.
12:18 < darosior> Hi jodobear
12:18 < darosior> "1. User Deposits funds into the app.2. User Withdraws balance from the app" => Your app is at a higher level than C-lightning, but you can withdraw onchain funds from `lightningd` using the `withdraw` command. You can also manage transactions (and implement withdrawal with `tx*` RPCs here is for example `txprepare`
12:18 < darosior> https://lightning.readthedocs.io/lightning-txprepare.7.html
12:18 <@niftynei> hey jodobear. great questions. i don't know a lot about LNURL, but you should check out fiatjaf's resources page https://github.com/fiatjaf/awesome-lnurl
12:18 <@niftynei> lol. hey darosior :P
12:19 < darosior> :)
12:19 <@niftynei> regarding 'withdrawals', it might be good to know if you mean "withdraw via a lightning invoice, over a lightning channel" or "withdraw to a bitcoin address, over the bitcoin blockchain"
12:20 < jodobear> Thanks for responding!)
12:20 <@niftynei> the `withdraw` command that darosior pointed out is for the second one (withdraw to a bitcoin address)
12:20 < jodobear> yes, about withdraw, everything happens off chain.No onchain tx on the app
12:20 < vasild> "1. User Deposits funds into the app" - I would say "generate an invoice from the app and ask the user to pay it", but maybe you do not mean that user does a ln payment? What do you mean by "funds" onchain BTC, other crypto, fiat?
12:21 <@niftynei> ah. ok. right. so i think the general idea for a withdrawal would be to have the user supply you with an invoice to pay
12:21 < jodobear> what darosior mentioned wouldn't work
12:21 < jodobear> niftynei yes
12:21 < jodobear> for deposit of funds, that also is off chain over ln
12:22 <@niftynei> right, as vasild mentioned, the most 'lightning' way to deposit funds would be for your app to provide the user with an invoice to pay, for the amount of funds they wanted to deposit
12:23 <@niftynei> you'd need to know how much they wanted to deposit ahead of generating the invoice though, unless you had static deposit amounts (like, deposit 50k sats, deposit 500ksats, etc)
12:24 < jodobear> niftynei for deposit i found the example on the github, and will attempt that or check other `Lapps` mentioned  there but, as for withdrawal, i am stuck
12:24 <@niftynei> kinda curious why the user need a balance tho
12:24 <@niftynei> hmm
12:25 <@niftynei> withdrawal would just be the user gives you an invoice, and you pay it
12:25 <@niftynei> i mean, you'd probably want to verify that the amount the invoice is for is correct
12:25 < jodobear> niftynei it's a game, and the balance thing is just a `UX` thing so that the user can keep track of their winnings and loss, can select how much they want to use that for the next round...
12:26 <@niftynei> yeah, that makes sense.
12:26 < jodobear> as for the verification, that i can do that comparing the `balance` value
12:27 < jodobear> can you help me understand how do i implement user giving me `invoice` and me processing it through BTCPay?
12:30 <@niftynei> might be better taking this to DM
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--- Log closed Wed Jan 15 00:00:08 2020