NIP-83

Wallet connect/bridge

draft optional author:arcbtc

Useful for clients wanting to intergrate non-custodal wallet features.

Intended for use with bitcoin, but could be used with any invoice payment system that can pay invoices/create invoices/check payment status.

Motivation

We wanted LNbits to have a funding source that pay invoices/create invoices/check payment status, all over nostr DMs. Simple plugins/middleware coud be made for lightning nodes that connect to the funding source.

Examples

There are two simple clients sending json over NIP04.

funding source client: Attached to the funding source, the other built into another service/client.
service client: Built into a service.

Creating an invoice

service client sends create_invoice event:

{
   "create_invoice":{
      "amount":"int",
      "memo":"<Optional[str]>",
      "description_hash":"<Optional[bytes]>"
   }
}

funding source client checks the pubkey has permission and sends generated_invoice event:

{
   "generated_invoice":{
      "payment_hash":"<string>",
      "payment_request":"<string>"
   }
}

Paying an invoice

service client sends pay_invoice event:

{
   "pay_invoice":{
      "invoice":"<string>",
      "note":"<Optional[str]>"
   }
}

Checking a payment in/out

service client sends check_payment event:

{
   "check_payment":{
      "payment_hash":"<string>"
   }
}

funding source client checks the pubkey has permission, checks the payment status and sends payment_status event:

{
   "payment_status":{
      "paid":"<bool>"
   }
}

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