Allow lightning payments to nodes with accept keysend

[Astro92]

As of LND 0.9 —accept keysend has allowed for spontaneous payments to nodes, this only requires the nodes pubkey. Therefore within the lightning wallet allow the invoice field to read/ scan node pubkeys to allow sending payments.

[steflsd]

+1 to this. It would be great to send any amount to someone's wallet without them needing an invoice. This opens up things like microtipping etc.

[microlancer]

I believe c-lightning also supports this.

https://lightning.readthedocs.io/lightning-keysend.7.html

It would be a very useful feature.

[blankscreengithub]

I vote for this feature too. I think it's a game changer for operability and greater adoption.

1. Coffee shop has public key as QR code at checkout.
2. I open my BlueWallet Lightning Wallet
3. I enter the amount to send
4. I scan the QR code
5. Barista at terminal sees my transaction come in
6. I get my goods

No invoice needed. This would also work for small shops, craft vendors, garage sales, etc.

[lndhub-admin]

if We allow user(account) pay own invoices in BlueWallet Client, IE: change :

screen/lnd/scanLndInvoice.js line 194

const currentUserInvoices = wallet.user_invoices_raw; // not fetching invoices, as we assume they were loaded previously
    if (currentUserInvoices.some(invoice => invoice.payment_hash === decoded.payment_hash)) {
      setIsLoading(false);
      ReactNativeHapticFeedback.trigger('notificationError', { ignoreAndroidSystemSettings: false });
      return alert(loc.lnd.sameWalletAsInvoiceError);
    }

and have BlueWallet Client assume when scan(paste) QR that only consist of pub_key (or is constructed as keysend:pub_key ?) then BlueWallet Client takes amount and has checkbox [x] keysend flagged, when button SEND it calls new function /keysend in LndHub

LndHub /keysend takes --amt --pub_key, where function /keysend verifies --pub_key with lightning.getnodeinfo then generates a invoice with user credentials pay internal deducts balance of --amt for user account ( reuse code in /payinvoice) then :

lightning.sendpayment --amt --pub_key --keysend

this would have deducted -amt from user(account) and made a keysend (invoice made and paid from user(account), all accounted in ledger)

need change in BlueWallet Client allow "PAY OWN" invoice and add in BlueWallet Client assume when QR/paste is only a pub_key it is a keysend request ***

[lndhub-admin]

with regards to need change in BlueWallet Client allow "PAY OWN" invoice is not needed for /keysend since LndHub would create invoice in function and not have the BlueWallet Client check.

Pay own invoice would be needed for LndHub-Admin be able send commands from BlueWallet Client, so ease on restriction "pay own invoice" is still welcome for planed future functionality.

[TheCherry]

I build atm a project for my community and want give them sats for specific things as a reward. Now my problem is that I need this feature too. The user should link his lndhub account with a permanent invoice, so I am able to send them sats then ever I want. The problem is now, that only this delay my project.

[xraid]

keysend being invoice-less so no need for a static invoice the BlueWallet Client can adapt to keysend easily, its harder to receive a keysend to a LndHub account wallet(card)

instead for Your use case :

if all your users connected to the same LndHub one can build a component that can pay the account/s without users actively need create invoice ...

this component is on the drawing board called a Grant component where admin of LndHub can pay into accounts

https://github.com/lndhub-admin

[Overtorment]

its probably easier to add ln address support