hello world

.gitignore

@@ -0,0 +1 @@
+vendor

Gopkg.lock

@@ -0,0 +1,285 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  digest = "1:a138d82090d405fcb3cba3d2f5858b01ad3bbd08832ffa6a6db433d9ad597575"
+  name = "github.com/btcsuite/btcwallet"
+  packages = [
+    "internal/zero",
+    "snacl",
+  ]
+  pruneopts = "UT"
+  revision = "8ae4afc70174bacc745e8dd89fc6db2d817909bd"
+
+[[projects]]
+  branch = "master"
+  digest = "1:064d2cebe444ff7907a912c3ee249c70ae7859fd0fb03c25a0240cbcce2adb4c"
+  name = "github.com/btcsuite/golangcrypto"
+  packages = [
+    "nacl/secretbox",
+    "pbkdf2",
+    "poly1305",
+    "salsa20/salsa",
+    "scrypt",
+  ]
+  pruneopts = "UT"
+  revision = "53f62d9b43e87a6c56975cf862af7edf33a8d0df"
+
+[[projects]]
+  digest = "1:e802928326e2d631840a238c372417c3ade751b79ff491c5f0a4755c912643cd"
+  name = "github.com/coreos/bbolt"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "4f5275f4ebbf6fe7cb772de987fa96ee674460a7"
+
+[[projects]]
+  digest = "1:76dc72490af7174349349838f2fe118996381b31ea83243812a97e5a0fd5ed55"
+  name = "github.com/dgrijalva/jwt-go"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "06ea1031745cb8b3dab3f6a236daf2b0aa468b7e"
+  version = "v3.2.0"
+
+[[projects]]
+  digest = "1:19c3d5be42d5d503b94650e45bb2a01264bb36caff20f708e9cf67a6683b4c04"
+  name = "github.com/golang/protobuf"
+  packages = [
+    "jsonpb",
+    "proto",
+    "protoc-gen-go/descriptor",
+    "ptypes/any",
+    "ptypes/struct",
+  ]
+  pruneopts = "UT"
+  revision = "bbd03ef6da3a115852eaf24c8a1c46aeb39aa175"
+
+[[projects]]
+  digest = "1:983bdae4397d2a7c88316865e7de6b76bbedd8c33342004931829eba0975d9ed"
+  name = "github.com/grpc-ecosystem/grpc-gateway"
+  packages = [
+    "runtime",
+    "runtime/internal",
+    "utilities",
+  ]
+  pruneopts = "UT"
+  revision = "f2862b476edcef83412c7af8687c9cd8e4097c0f"
+
+[[projects]]
+  branch = "master"
+  digest = "1:a330103bc9731260ee9fa14764e9e3fce46e02de19d6aca3eeba1d425badfbf0"
+  name = "github.com/juju/loggo"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "584905176618da46b895b176c721b02c476b6993"
+
+[[projects]]
+  digest = "1:9acadb9c8c15b8a9f635a7fa960c9a522b001a3919bc03df92ac26c372476aff"
+  name = "github.com/labstack/echo"
+  packages = [
+    ".",
+    "middleware",
+  ]
+  pruneopts = "UT"
+  revision = "1abaa3049251d17932e4313c2d6165073fd07fd8"
+  version = "v3.3.6"
+
+[[projects]]
+  digest = "1:568171fc14a3d819b112c3e219d351ea7b05e8dad7935c4168c6b3373244a686"
+  name = "github.com/labstack/gommon"
+  packages = [
+    "bytes",
+    "color",
+    "log",
+    "random",
+  ]
+  pruneopts = "UT"
+  revision = "2a618302b929cc20862dda3aa6f02f64dbe740dd"
+  version = "v0.2.7"
+
+[[projects]]
+  digest = "1:c2b45ecd1f0a0d7d3820c1c75db58ea2f5f6e89452870f1090b1afae1460c96c"
+  name = "github.com/lightningnetwork/lnd"
+  packages = [
+    "lnrpc",
+    "macaroons",
+  ]
+  pruneopts = "UT"
+  revision = "fb95858afce6d7129758e7677bcb1552c5be2c51"
+  version = "v0.5-beta-rc2"
+
+[[projects]]
+  digest = "1:c658e84ad3916da105a761660dcaeb01e63416c8ec7bc62256a9b411a05fcd67"
+  name = "github.com/mattn/go-colorable"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "167de6bfdfba052fa6b2d3664c8f5272e23c9072"
+  version = "v0.0.9"
+
+[[projects]]
+  digest = "1:0981502f9816113c9c8c4ac301583841855c8cf4da8c72f696b3ebedf6d0e4e5"
+  name = "github.com/mattn/go-isatty"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "6ca4dbf54d38eea1a992b3c722a76a5d1c4cb25c"
+  version = "v0.0.4"
+
+[[projects]]
+  branch = "master"
+  digest = "1:d673e95129a1107bfd04e093751a5e1267faabc27d218d824fb013f57ac08f55"
+  name = "github.com/rogpeppe/fastuuid"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "6724a57986aff9bff1a1770e9347036def7c89f6"
+
+[[projects]]
+  digest = "1:c468422f334a6b46a19448ad59aaffdfc0a36b08fdcc1c749a0b29b6453d7e59"
+  name = "github.com/valyala/bytebufferpool"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "e746df99fe4a3986f4d4f79e13c1e0117ce9c2f7"
+  version = "v1.0.0"
+
+[[projects]]
+  branch = "master"
+  digest = "1:268b8bce0064e8c057d7b913605459f9a26dcab864c0886a56d196540fbf003f"
+  name = "github.com/valyala/fasttemplate"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "dcecefd839c4193db0d35b88ec65b4c12d360ab0"
+
+[[projects]]
+  branch = "master"
+  digest = "1:a57b670b0726ad104be74e5abc7b4eaea06f04a93f0fd5013d8f2a29b146753f"
+  name = "golang.org/x/crypto"
+  packages = [
+    "acme",
+    "acme/autocert",
+    "curve25519",
+    "internal/subtle",
+    "nacl/box",
+    "nacl/secretbox",
+    "poly1305",
+    "salsa20/salsa",
+  ]
+  pruneopts = "UT"
+  revision = "85e1b3f9139abd58575d728a509643924e3b2ebf"
+
+[[projects]]
+  digest = "1:279284b3cc1429d8ea79402792b17c5dbfadd583ec4963db69f0368762f89be4"
+  name = "golang.org/x/net"
+  packages = [
+    "context",
+    "http2",
+    "http2/hpack",
+    "idna",
+    "internal/timeseries",
+    "lex/httplex",
+    "trace",
+  ]
+  pruneopts = "UT"
+  revision = "ae89d30ce0c63142b652837da33d782e2b0a9b25"
+
+[[projects]]
+  branch = "master"
+  digest = "1:008fb9f84ae9bf7994228b9c78810d44162071ec13caf28291677897dca819ee"
+  name = "golang.org/x/sys"
+  packages = ["unix"]
+  pruneopts = "UT"
+  revision = "d989b31c87461dc8ab2f1cac6792814e27fadea9"
+
+[[projects]]
+  digest = "1:a2ab62866c75542dd18d2b069fec854577a20211d7c0ea6ae746072a1dccdd18"
+  name = "golang.org/x/text"
+  packages = [
+    "collate",
+    "collate/build",
+    "internal/colltab",
+    "internal/gen",
+    "internal/tag",
+    "internal/triegen",
+    "internal/ucd",
+    "language",
+    "secure/bidirule",
+    "transform",
+    "unicode/bidi",
+    "unicode/cldr",
+    "unicode/norm",
+    "unicode/rangetable",
+  ]
+  pruneopts = "UT"
+  revision = "f21a4dfb5e38f5895301dc265a8def02365cc3d0"
+  version = "v0.3.0"
+
+[[projects]]
+  digest = "1:c2dee8dbcc504d1a7858f5dbaed7c8b256c512c5e9e81480158c30185bbd2792"
+  name = "google.golang.org/genproto"
+  packages = [
+    "googleapis/api/annotations",
+    "googleapis/rpc/status",
+  ]
+  pruneopts = "UT"
+  revision = "df60624c1e9b9d2973e889c7a1cff73155da81c4"
+
+[[projects]]
+  digest = "1:8d9ccf0a790b530f94357a5d27e9c86fb53e862b6e0f9133c792269c0b567218"
+  name = "google.golang.org/grpc"
+  packages = [
+    ".",
+    "codes",
+    "connectivity",
+    "credentials",
+    "grpclb/grpc_lb_v1",
+    "grpclog",
+    "internal",
+    "keepalive",
+    "metadata",
+    "naming",
+    "peer",
+    "stats",
+    "status",
+    "tap",
+    "transport",
+  ]
+  pruneopts = "UT"
+  revision = "b3ddf786825de56a4178401b7e174ee332173b66"
+
+[[projects]]
+  digest = "1:9f0c81ca4b497d3723d0a66495d8a1efe277068b77ef3ad2d6460e480bf09bb3"
+  name = "gopkg.in/errgo.v1"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "b20caedf0710d0988e92b5f2d76843ad1f231f2d"
+  version = "v1.0.0"
+
+[[projects]]
+  digest = "1:f75654fe9e7a52c9df4c13d3c362a02e9dd0ab5e1ef336212ae68964c05ff53f"
+  name = "gopkg.in/macaroon-bakery.v2"
+  packages = [
+    "bakery",
+    "bakery/checkers",
+    "bakery/internal/macaroonpb",
+  ]
+  pruneopts = "UT"
+  revision = "94012773d2874a067572bd16d7d11ae02968b47b"
+
+[[projects]]
+  digest = "1:0622939c131fd6ca6fc9dfb25adda2f195062975045baba7ad94607e6f3c52b7"
+  name = "gopkg.in/macaroon.v2"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "bed2a428da6e56d950bed5b41fcbae3141e5b0d0"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  input-imports = [
+    "github.com/grpc-ecosystem/grpc-gateway/runtime",
+    "github.com/labstack/echo",
+    "github.com/labstack/echo/middleware",
+    "github.com/lightningnetwork/lnd/lnrpc",
+    "github.com/lightningnetwork/lnd/macaroons",
+    "google.golang.org/grpc",
+    "google.golang.org/grpc/credentials",
+  ]
+  solver-name = "gps-cdcl"
+  solver-version = 1

Gopkg.toml

@@ -0,0 +1,31 @@
+# Gopkg.toml example
+#
+# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/lightningnetwork/lnd", "google.golang.org/grpc"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#   name = "github.com/x/y"
+#   version = "2.4.0"
+#
+# [prune]
+#   non-go = false
+#   go-tests = true
+#   unused-packages = true
+
+
+[prune]
+  go-tests = true
+  unused-packages = true
+

invoices.go

@@ -0,0 +1,109 @@
+package main
+
+import (
+	"flag"
+	"github.com/bumi/lntip/ln"
+	"github.com/labstack/echo"
+	"github.com/labstack/echo/middleware"
+	"html/template"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"strconv"
+)
+
+var stdOutLogger = log.New(os.Stdout, "", log.LstdFlags)
+
+type TemplateRenderer struct {
+	templates *template.Template
+}
+
+func (t *TemplateRenderer) Render(w io.Writer, name string, data interface{}, c echo.Context) error {
+	// Add global methods if data is a map
+	if viewContext, isMap := data.(map[string]interface{}); isMap {
+		viewContext["reverse"] = c.Echo().Reverse
+	}
+
+	return t.templates.ExecuteTemplate(w, name, data)
+}
+
+func main() {
+	var indexView = `
+<!DOCTYPE html>
+<html>
+	<head>
+		<meta charset="UTF-8">
+		<title></title>
+    <script type="text/javascript"> 
+      function payme(memo, amount) {
+        fetch('/payme?memo=' + memo + '&amount=' + amount)
+          .then(function(response) {
+            console.log(response.json());
+          });
+      }
+    </script>
+	</head>
+	<body>
+    hallo
+	</body>
+</html>`
+
+	address := flag.String("address", "localhost:10009", "The host and port of the ln gRPC server")
+	certFile := flag.String("cert", "tls.cert", "Path to the lnd tls.cert file")
+	macaroonFile := flag.String("macaroon", "invoice.macaroon", "Path to the lnd macaroon file")
+	viewPath := flag.String("template", "", "Path of a custom HTML template file")
+
+	flag.Parse()
+
+	if *viewPath != "" {
+		content, err := ioutil.ReadFile(*viewPath)
+		if err != nil {
+			panic(err)
+		}
+		indexView = string(content)
+	}
+
+	e := echo.New()
+	e.Static("/static", "views/assets")
+	e.Use(middleware.CORS())
+	e.Use(middleware.Recover())
+	renderer := &TemplateRenderer{
+		templates: template.Must(template.New("index").Parse(indexView)),
+	}
+	e.Renderer = renderer
+
+	lndOptions := ln.LNDoptions{
+		Address:      *address,
+		CertFile:     *certFile,
+		MacaroonFile: *macaroonFile,
+	}
+	lnClient, err := ln.NewLNDclient(lndOptions)
+	if err != nil {
+		panic(err)
+	}
+
+	e.GET("/payme", func(c echo.Context) error {
+		memo := c.FormValue("memo")
+		amount, _ := strconv.ParseInt(c.FormValue("amount"), 10, 64)
+		invoice, err := lnClient.GenerateInvoice(amount, memo)
+		if err != nil {
+			return c.JSON(http.StatusInternalServerError, "error")
+		}
+
+		return c.JSON(http.StatusOK, invoice)
+	})
+
+	e.GET("/settled/:invoiceId", func(c echo.Context) error {
+		invoiceId := c.Param("invoiceId")
+		invoice, _ := lnClient.CheckInvoice(invoiceId)
+		return c.JSON(http.StatusOK, invoice)
+	})
+
+	e.GET("/", func(c echo.Context) error {
+		return c.Render(http.StatusOK, "index", map[string]interface{}{})
+	})
+
+	e.Logger.Fatal(e.Start(":1323"))
+}

ln/lnd.go

@@ -0,0 +1,149 @@
+package ln
+
+import (
+	"context"
+	"encoding/hex"
+	"io/ioutil"
+  "log"
+  "os"
+
+  "github.com/lightningnetwork/lnd/lnrpc"
+  "gopkg.in/macaroon.v2"
+  "github.com/lightningnetwork/lnd/macaroons"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+)
+
+
+var stdOutLogger = log.New(os.Stdout, "", log.LstdFlags)
+
+// Invoice is a Lightning Network invoice and contains the typical invoice string and the payment hash.
+type Invoice struct {
+	ImplDepID string
+	PaymentHash string
+	PaymentRequest string
+}
+
+type LNDclient struct {
+	lndClient lnrpc.LightningClient
+	ctx       context.Context
+	conn      *grpc.ClientConn
+}
+
+// GenerateInvoice generates an invoice with the given price and memo.
+func (c LNDclient) GenerateInvoice(amount int64, memo string) (Invoice, error) {
+	result := Invoice{}
+
+	// Create the request and send it
+	invoice := lnrpc.Invoice{
+		Memo:  memo,
+		Value: amount,
+	}
+	stdOutLogger.Println("Creating invoice for a new API request")
+	res, err := c.lndClient.AddInvoice(c.ctx, &invoice)
+	if err != nil {
+		return result, err
+	}
+
+	result.ImplDepID = hex.EncodeToString(res.RHash)
+	result.PaymentHash = result.ImplDepID
+	result.PaymentRequest = res.PaymentRequest
+	return result, nil
+}
+
+// CheckInvoice takes an invoice ID and checks if the corresponding invoice was settled.
+// An error is returned if no corresponding invoice was found.
+// False is returned if the invoice isn't settled.
+func (c LNDclient) CheckInvoice(id string) (bool, error) {
+	// In the case of lnd, the ID is the hex encoded preimage hash.
+	plainHash, err := hex.DecodeString(id)
+	if err != nil {
+		return false, err
+	}
+
+	stdOutLogger.Printf("Checking invoice for hash %v\n", id)
+
+	// Get the invoice for that hash
+	paymentHash := lnrpc.PaymentHash{
+		RHash: plainHash,
+		// Hex encoded, must be exactly 32 byte
+		RHashStr: id,
+	}
+	invoice, err := c.lndClient.LookupInvoice(c.ctx, &paymentHash)
+	if err != nil {
+		return false, err
+	}
+
+	// Check if invoice was settled
+	if !invoice.GetSettled() {
+		return false, nil
+	}
+	return true, nil
+}
+
+func (c LNDclient) GetURIs() (bool, error) {
+  req := &lnrpc.GetInfoRequest{}
+  info, err := c.lndClient.GetInfo(c.ctx, req)
+	stdOutLogger.Println(info.Uris)
+  return true, err
+}
+
+
+// NewLNDclient creates a new LNDclient instance.
+func NewLNDclient(lndOptions LNDoptions) (LNDclient, error) {
+	result := LNDclient{}
+
+	// Set up a connection to the server.
+	creds, err := credentials.NewClientTLSFromFile(lndOptions.CertFile, "")
+	if err != nil {
+		return result, err
+	}
+  opts := []grpc.DialOption{
+    grpc.WithTransportCredentials(creds),
+  }
+
+	macaroonData, err := ioutil.ReadFile(lndOptions.MacaroonFile)
+	if err != nil {
+		return result, err
+	}
+  mac := &macaroon.Macaroon{}
+	if err = mac.UnmarshalBinary(macaroonData); err != nil {
+    return result, err
+  }
+
+  macCred := macaroons.NewMacaroonCredential(mac)
+  opts = append(opts, grpc.WithPerRPCCredentials(macCred))
+
+  conn, err := grpc.Dial(lndOptions.Address, opts...)
+  if err != nil {
+    return result, err
+  }
+
+	c := lnrpc.NewLightningClient(conn)
+
+	result = LNDclient{
+		conn:      conn,
+		ctx:       context.Background(),
+		lndClient: c,
+	}
+
+	return result, nil
+}
+
+// LNDoptions are the options for the connection to the lnd node.
+type LNDoptions struct {
+	// Address of your LND node, including the port.
+	// Optional ("localhost:10009" by default).
+	Address string
+	// Path to the "tls.cert" file that your LND node uses.
+	// Optional ("tls.cert" by default).
+	CertFile string
+	// Path to the macaroon file that your LND node uses.
+	// "invoice.macaroon" if you only use the GenerateInvoice() and CheckInvoice() methods
+	// (required by the middleware in the package "wall").
+	// "admin.macaroon" if you use the Pay() method (required by the client in the package "pay").
+	// Optional ("invoice.macaroon" by default).
+	MacaroonFile string
+}
+

views/assets/lntip.css

@@ -0,0 +1,24 @@
+@keyframes slideIn{0%{opacity:0;transform:scale(.85)}70%{opacity:1;transform:scale(1.03)}100%{transform:scale(1)}}@keyframes slideOut{from{opacity:1}to{opacity:0}}@keyframes rotate{from{transform:rotate(0)}to{transform:rotate(180deg)}}.jPopup{position:absolute;top:0;right:0;bottom:0;left:0;z-index:9999;max-width:100%;padding:50px 15px 15px;box-sizing:border-box}.jPopup:after{content:'';position:fixed;top:0;right:0;bottom:0;left:0;z-index:9998;background:#fff}.jPopup>.jCloseBtn{position:absolute;right:1rem;top:1rem;z-index:9999;outline:0;border:0;box-sizing:border-box;cursor:pointer;width:5rem;height:5rem;background:#f2f2f2;border-radius:50%}.jPopup>.jCloseBtn>.graphicIcon{width:2rem;height:2rem;position:relative;margin:0 auto}.jPopup>.jCloseBtn>.graphicIcon:after,.jPopup>.jCloseBtn>.graphicIcon:before{position:absolute;left:.9rem;content:'';height:2rem;width:.3rem;background-color:#adadad;border-radius:.5rem}.jPopup>.jCloseBtn>.graphicIcon:before{-ms-transform:rotate(45deg);transform:rotate(45deg)}.jPopup>.jCloseBtn>.graphicIcon:after{-ms-transform:rotate(-45deg);transform:rotate(-45deg)}.jPopup>.jCloseBtn:hover>.graphicIcon{animation:rotate 250ms ease-in}.jPopup>.jCloseBtn:active{-ms-transform:scale(.95);transform:scale(.95)}.jPopup>.content{top:50%;left:1.5rem;right:1.5rem;position:absolute;z-index:9999;-ms-transform:translateY(-50%);transform:translateY(-50%)}@media screen and (min-width:680px){.jPopup{padding:8rem 3rem 3rem}.jPopup>.jCloseBtn{width:6rem;height:6rem;right:2rem;top:2rem}.jPopup>.jCloseBtn:after{content:'(esc)';position:absolute;top:6.5rem;left:50%;font-size:1.1rem;-ms-transform:translateX(-50%);transform:translateX(-50%);color:#adadad;pointer-events:none}.jPopup>.jCloseBtn>.graphicIcon{width:3rem;height:3rem}.jPopup>.jCloseBtn>.graphicIcon:after,.jPopup>.jCloseBtn>.graphicIcon:before{left:1.4rem;height:3rem}.jPopup>.content{left:3rem;right:3rem}}.jPopupOpen,.jPopupOpen body{overflow:hidden}.jPopupOpen .jPopup{animation:slideIn .5s cubic-bezier(.34,.34,.26,.99)}.jPopupClosed .jPopup{animation:slideOut 250ms ease-in}
+
+.jPopup > .jCloseBtn {
+  z-index:10000;
+}
+
+.lntip-payment-request {
+  width: 220px;
+  margin: 0 auto;
+  text-align: center;
+}
+.lntip-payment-request h1, .lntip-payment-request h2 {
+  text-align: center;
+}
+
+.lntip-details {
+  width: 200px;
+  overflow: hidden;
+}
+
+.lntip-copy {
+  cursor: pointer;
+  display: inline;
+}

views/assets/lntip.js

@@ -0,0 +1,126 @@
+/*! https://github.com/robiveli/jpopup */
+!function(e,n){void 0===e&&void 0!==window&&(e=window),"function"==typeof define&&define.amd?define([],function(){return e.jPopup=n()}):"object"==typeof module&&module.exports?module.exports=n():e.jPopup=n()}(this,function(){"use strict";var n,o,t=function(){var e=0<arguments.length&&void 0!==arguments[0]?arguments[0]:"";1==(n=0!=e.shouldSetHash)&&(o=void 0!==e.hashtagValue?e.hashtagValue:"#popup"),i(e.content).then(a).then(1==n&&s(!0))},i=function(e){return u.classList.add("jPopupOpen"),Promise.resolve(document.body.insertAdjacentHTML("beforeend",'<div class="jPopup">\n                <button type="button" class="jCloseBtn">\n                    <div class="graphicIcon"></div>\n                </button>\n                <div class="content">'.concat(e,"</div>\n            </div>")))},s=function(e){1==e?window.location.hash=o:window.history.back()},d=function(e){27==e.keyCode&&t.prototype.close(!0)},c=function(){window.location.hash!==o&&t.prototype.close(!1)},a=function(){document.getElementsByClassName("jCloseBtn")[0].addEventListener("click",function(){t.prototype.close(!0)}),window.addEventListener("keydown",d),1==n&&window.addEventListener("hashchange",c)},u=document.querySelector("html");return t.prototype={close:function(e){u.classList.add("jPopupClosed"),1==n&&(e&&s(!1),window.removeEventListener("hashchange",c)),window.removeEventListener("keydown",d),document.getElementsByClassName("jPopup")[0].addEventListener("animationend",function(e){e.target.parentNode.removeChild(this),u.classList.remove("jPopupClosed"),u.classList.remove("jPopupOpen")})},open:function(e){t(e)}},t});
+
+if (document.currentScript) {
+  window.LNTIP_HOST = document.currentScript.getAttribute('lntip-host');
+}
+
+LnTip = function (amount, memo, host) {
+  this.host = host || window.LNTIP_HOST;
+  this.amount = amount;
+  this.memo = memo || '';
+  this.getInvoice();
+}
+
+LnTip.prototype.loadStylesheet = function () {
+  if (this.styleLoaded) { return }
+  var head = document.getElementsByTagName('head')[0];
+  var css = document.createElement('link');
+  css.rel = "stylesheet";
+  css.type = "text/css";
+  css.href = `${this.host}/static/lntip.css`;
+  head.appendChild(css);
+  this.styleLoaded = true;
+}
+
+LnTip.prototype.closePopup = function () {
+  if (this.popup) {
+    this.popup.close();
+    this.popup = null;
+  }
+}
+
+LnTip.prototype.openPopup = function (content) {
+  this.closePopup();
+  this.loadStylesheet();
+  this.popup = new jPopup({
+    content: content,
+    shouldSetHash: false
+  });
+  return this.popup;
+}
+
+LnTip.prototype.thanks = function () {
+  if (window.lntipPopup) { window.lntipPopup.close(); window.lntipPopup = null; }
+  var content = '<div class="lntip-payment-request"><h1 class="lntip-headline">Thank you!</h1></div>';
+  this.openPopup(content);
+  setTimeout(() => {
+    this.closePopup();
+  }, 3000);
+}
+
+LnTip.prototype.watchPayment = function () {
+  if (this.paymentWatcher) { window.clearInterval(this.paymentWatcher) }
+  this.paymentWatcher = window.setInterval(() => {
+    this._request(`${this.host}/settled/${this.invoice.ImplDepID}`)
+      .then((settled) => {
+        if (settled) {
+          this.invoice.settled = true;
+          this.thanks();
+          this.stopWatchingPayment();
+        }
+      })
+  }, 1000);
+}
+
+LnTip.prototype.stopWatchingPayment = function () {
+  window.clearInterval(this.paymentWatcher);
+  this.paymentWatcher = null;
+}
+
+LnTip.prototype.payWithWebln = function () {
+  if (!webln.isEnabled) {
+	  webln.enable().then((weblnResponse) => {
+      return webln.sendPayment({ paymentRequest: invoice.PaymentRequest })
+    }).catch((e) => {
+      this.requestPayment();
+    })
+  } else {
+    return webln.sendPayment({ paymentRequest: invoice.PaymentRequest })
+  }
+}
+
+LnTip.prototype.requestPayment = function () {
+  var content = `<div class="lntip-payment-request">
+    <h1>${this.memo}</h1>
+    <h2>${this.amount} satoshi</h2>
+    <div class="lntip-qr">
+      <img src="https://chart.googleapis.com/chart?cht=qr&chs=200x200&chl=${this.invoice.PaymentRequest}">
+    </div>
+    <div class="lntip-details">
+      <a href="lightning:${this.invoice.PaymentRequest}" class="lntip-invoice">
+        ${this.invoice.PaymentRequest}
+      </a>
+      <div class="lntip-copy" id="lntip-copy">
+        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-copy"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path></svg>
+      </div>
+    </div>
+  </div>`
+  this.openPopup(content);
+
+  document.getElementById('lntip-copy').onclick = function() {
+    navigator.clipboard.writeText(invoice.PaymentRequest);
+    alert('Copied to clipboad');
+  }
+  return Promise.resolve();
+}
+
+LnTip.prototype.getInvoice = function () {
+  return this._request(`${this.host}/payme?memo=${this.memo}&amount=${this.amount}`)
+    .then((invoice) => {
+      this.invoice = invoice;
+      this.watchPayment();
+
+      if (typeof webln !== 'undefined') {
+        this.payWithWebln();
+      } else {
+        this.requestPayment();
+      }
+    })
+}
+
+LnTip.prototype._request = function(url) {
+  return fetch(url).then((response) => {
+    return response.json();
+  })
+}

views/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<meta charset="UTF-8">
+    <title></title>
+	</head>
+	<body>
+    <script src="/static/lntip.js" lntip-host="http://localhost:1323"></script>
+
+	</body>
+</html>