Update project structure and build process

libwallet/lnurl.go

@@ -0,0 +1,79 @@
+package libwallet
+
+import (
+	"github.com/lightningnetwork/lnd/lnwire"
+	"github.com/muun/libwallet/lnurl"
+)
+
+type LNURLEvent struct {
+	Code     int
+	Message  string
+	Metadata *LNURLEventMetadata
+}
+
+type LNURLEventMetadata struct {
+	Host      string
+	Invoice   string
+}
+
+const (
+	LNURLErrDecode              = lnurl.ErrDecode
+	LNURLErrUnsafeURL           = lnurl.ErrUnsafeURL
+	LNURLErrUnreachable         = lnurl.ErrUnreachable
+	LNURLErrInvalidResponse     = lnurl.ErrInvalidResponse
+	LNURLErrResponse            = lnurl.ErrResponse
+	LNURLErrUnknown             = lnurl.ErrUnknown
+	LNURLErrWrongTag            = lnurl.ErrWrongTag
+	LNURLErrNoAvailableBalance  = lnurl.ErrNoAvailableBalance
+	LNURLErrRequestExpired      = lnurl.ErrRequestExpired
+	LNURLErrNoRoute             = lnurl.ErrNoRoute
+	LNURLErrTorNotSupported     = lnurl.ErrTorNotSupported
+	LNURLErrAlreadyUsed         = lnurl.ErrAlreadyUsed
+	LNURLErrForbidden           = lnurl.ErrForbidden
+	LNURLErrCountryNotSupported = lnurl.ErrCountryNotSupported
+	LNURLStatusContacting       = lnurl.StatusContacting
+	LNURLStatusInvoiceCreated   = lnurl.StatusInvoiceCreated
+	LNURLStatusReceiving        = lnurl.StatusReceiving
+)
+
+type LNURLListener interface {
+	OnUpdate(e *LNURLEvent)
+	OnError(e *LNURLEvent)
+}
+
+func LNURLValidate(qr string) bool {
+	return lnurl.Validate(qr)
+}
+
+// Withdraw will parse an LNURL withdraw QR and begin a withdraw process.
+// Caller must wait for the actual payment after this function has notified success.
+func LNURLWithdraw(invoiceBuilder *InvoiceBuilder, qr string, listener LNURLListener) {
+	createInvoiceFunc := func(amt lnwire.MilliSatoshi, desc string, host string) (string, error) {
+		metadata := &OperationMetadata{
+			LnurlSender: host,
+		}
+
+		return invoiceBuilder.AmountMSat(int64(amt)).
+			Description(desc).
+			Metadata(metadata).
+			Build()
+	}
+
+	allowUnsafe := invoiceBuilder.net != Mainnet()
+
+	go lnurl.Withdraw(qr, createInvoiceFunc, allowUnsafe, func(e *lnurl.Event) {
+		event := &LNURLEvent{
+			Code:    e.Code,
+			Message: e.Message,
+			Metadata: &LNURLEventMetadata{
+				Host:      e.Metadata.Host,
+				Invoice:   e.Metadata.Invoice,
+			},
+		}
+		if event.Code < 100 {
+			listener.OnError(event)
+		} else {
+			listener.OnUpdate(event)
+		}
+	})
+}