diff --git a/lnbits/extensions/satspay/templates/satspay/index.html b/lnbits/extensions/satspay/templates/satspay/index.html
index 7b1ce492..b050b95e 100644
--- a/lnbits/extensions/satspay/templates/satspay/index.html
+++ b/lnbits/extensions/satspay/templates/satspay/index.html
@@ -416,15 +416,14 @@
     },
     methods: {
       cancelCharge: function (data) {
-        var self = this
-        self.formDialogCharge.data.description = ''
-        self.formDialogCharge.data.onchainwallet = ''
-        self.formDialogCharge.data.lnbitswallet = ''
-        self.formDialogCharge.data.time = null
-        self.formDialogCharge.data.amount = null
-        self.formDialogCharge.data.webhook = ''
-        self.formDialogCharge.data.completelink = ''
-        self.formDialogCharge.show = false
+        this.formDialogCharge.data.description = ''
+        this.formDialogCharge.data.onchainwallet = ''
+        this.formDialogCharge.data.lnbitswallet = ''
+        this.formDialogCharge.data.time = null
+        this.formDialogCharge.data.amount = null
+        this.formDialogCharge.data.webhook = ''
+        this.formDialogCharge.data.completelink = ''
+        this.formDialogCharge.show = false
       },
 
       getWalletLinks: async function () {
@@ -449,11 +448,10 @@
         }
       },
       openQrCodeDialog: function (linkId) {
-        var self = this
         var getAddresses = this.getAddresses
         getAddresses(linkId)
-        self.current = linkId
-        self.Addresses.show = true
+        this.current = linkId
+        this.Addresses.show = true
       },
       getCharges: async function () {
         try {
@@ -468,30 +466,28 @@
         }
       },
       sendFormDataCharge: function () {
-        var self = this
-        var wallet = this.g.user.wallets[0].inkey
-        var data = this.formDialogCharge.data
+        const wallet = this.g.user.wallets[0].inkey
+        const data = this.formDialogCharge.data
         data.amount = parseInt(data.amount)
         data.time = parseInt(data.time)
         data.onchainwallet = this.onchainwallet?.id
         this.createCharge(wallet, data)
       },
       timerCount: function () {
-        self = this
-        var refreshIntervalId = setInterval(function () {
-          for (i = 0; i < self.ChargeLinks.length - 1; i++) {
-            if (self.ChargeLinks[i]['paid'] == 'True') {
+        var refreshIntervalId = setInterval( () => {
+          for (i = 0; i < this.ChargeLinks.length - 1; i++) {
+            if (this.ChargeLinks[i]['paid'] == 'True') {
               setTimeout(async function () {
                 await LNbits.api.request(
                   'GET',
                   '/satspay/api/v1/charges/balance/' +
-                    self.ChargeLinks[i]['id'],
+                    this.ChargeLinks[i]['id'],
                   'filla'
                 )
               }, 2000)
             }
           }
-          self.getCharges()
+          this.getCharges()
         }, 20000)
       },
       createCharge: async function (wallet, data) {
@@ -518,19 +514,18 @@
       },
 
       deleteChargeLink: function (chargeId) {
-        var self = this
         var link = _.findWhere(this.ChargeLinks, {id: chargeId})
         LNbits.utils
           .confirmDialog('Are you sure you want to delete this pay link?')
-          .onOk(async function () {
+          .onOk(async () => {
             try {
               const response = await LNbits.api.request(
                 'DELETE',
                 '/satspay/api/v1/charge/' + chargeId,
-                self.g.user.wallets[0].adminkey
+                this.g.user.wallets[0].adminkey
               )
 
-              self.ChargeLinks = _.reject(self.ChargeLinks, function (obj) {
+              this.ChargeLinks = _.reject(this.ChargeLinks, function (obj) {
                 return obj.id === chargeId
               })
             } catch (error) {
@@ -544,7 +539,6 @@
     },
     created: function () {
       console.log(this.g.user)
-      var self = this
       var getCharges = this.getCharges
       getCharges()
       var getWalletLinks = this.getWalletLinks