feat: add promo codes and conditional events (#40)

* add extra column
* add conditional events
* refunds
* conditional events working
* adding promo codes
* promo codes logic

---------

Co-authored-by: dni ⚡ <office@dnilabs.com>

crud.py

@@ -3,13 +3,13 @@ from datetime import datetime, timedelta, timezone
 from lnbits.db import Database
 from lnbits.helpers import urlsafe_short_hash
 
-from .models import CreateEvent, Event, Ticket
+from .models import CreateEvent, Event, Ticket, TicketExtra
 
 db = Database("ext_events")
 
 
 async def create_ticket(
-    payment_hash: str, wallet: str, event: str, name: str, email: str
+    payment_hash: str, wallet: str, event: str, name: str, email: str, extra: dict
 ) -> Ticket:
     now = datetime.now(timezone.utc)
     ticket = Ticket(
@@ -22,6 +22,7 @@ async def create_ticket(
         paid=False,
         reg_timestamp=now,
         time=now,
+        extra=TicketExtra(**extra) if extra else TicketExtra(),
     )
     await db.insert("events.ticket", ticket)
     return ticket

migrations.py

@@ -160,3 +160,21 @@ async def m005_add_image_banner(db):
     Add a column to allow an image banner for the event
     """
     await db.execute("ALTER TABLE events.events ADD COLUMN banner TEXT;")
+
+
+async def m006_add_extra_fields(db):
+    """
+    Add a canceled and 'extra' column to events and ticket tables
+    to support promo codes and ticket metadata.
+    """
+    # Add canceled and 'extra' columns to events table
+    await db.execute(
+        """
+        ALTER TABLE events.events
+        ADD COLUMN canceled BOOLEAN NOT NULL DEFAULT FALSE,
+        ADD COLUMN extra TEXT;
+        """
+    )
+
+    # Add 'extra' column to ticket table
+    await db.execute("ALTER TABLE events.ticket ADD COLUMN extra TEXT;")

models.py

@@ -1,7 +1,29 @@
 from datetime import datetime
 
 from fastapi import Query
-from pydantic import BaseModel, EmailStr
+from pydantic import BaseModel, EmailStr, Field, validator
+
+
+class PromoCode(BaseModel):
+    code: str
+    discount_percent: float = 0.0
+    active: bool = True
+
+    # make the promo code uppercase
+    @validator("code")
+    def uppercase_code(cls, v):
+        return v.upper()
+
+    @validator("discount_percent")
+    def validate_discount_percent(cls, v):
+        assert 0 <= v <= 100, "Discount must be between 0 and 100."
+        return v
+
+
+class EventExtra(BaseModel):
+    promo_codes: list[PromoCode] = Field(default_factory=list)
+    conditional: bool = False
+    min_tickets: int = 1
 
 
 class CreateEvent(BaseModel):
@@ -15,11 +37,7 @@ class CreateEvent(BaseModel):
     amount_tickets: int = Query(..., ge=0)
     price_per_ticket: float = Query(..., ge=0)
     banner: str | None = None
-
+    extra: EventExtra = Field(default_factory=EventExtra)
-
-class CreateTicket(BaseModel):
-    name: str
-    email: EmailStr
 
 
 class Event(BaseModel):
@@ -28,6 +46,7 @@ class Event(BaseModel):
     name: str
     info: str
     closing_date: str
+    canceled: bool = False
     event_start_date: str
     event_end_date: str
     currency: str
@@ -36,6 +55,21 @@ class Event(BaseModel):
     time: datetime
     sold: int = 0
     banner: str | None = None
+    extra: EventExtra = Field(default_factory=EventExtra)
+
+
+class TicketExtra(BaseModel):
+    applied_promo_code: str | None = None
+    sats_paid: int | None = None
+    refund_address: str | None = None
+    refunded: bool = False
+
+
+class CreateTicket(BaseModel):
+    name: str
+    email: EmailStr
+    promo_code: str | None = None
+    refund_address: str | None = None
 
 
 class Ticket(BaseModel):
@@ -48,3 +82,4 @@ class Ticket(BaseModel):
     paid: bool
     time: datetime
     reg_timestamp: datetime
+    extra: TicketExtra = Field(default_factory=TicketExtra)

services.py

@@ -1,4 +1,13 @@
-from .crud import get_event, update_event, update_ticket
+from lnurl import execute
+from loguru import logger
+
+from .crud import (
+    get_event,
+    get_event_tickets,
+    purge_unpaid_tickets,
+    update_event,
+    update_ticket,
+)
 from .models import Ticket
 
 
@@ -16,3 +25,30 @@ async def set_ticket_paid(ticket: Ticket) -> Ticket:
     await update_event(event)
 
     return ticket
+
+
+async def refund_tickets(event_id: str):
+    """
+    Refund tickets for an event that has not met the minimum ticket requirement.
+    This function should be called when the event is closed and the minimum ticket
+    condition is not met.
+    """
+    await purge_unpaid_tickets(event_id)
+    tickets = await get_event_tickets(event_id)
+
+    if not tickets:
+        return
+
+    for ticket in tickets:
+        if ticket.extra.refunded:
+            continue
+        if ticket.paid and ticket.extra.refund_address and ticket.extra.sats_paid:
+            try:
+                res = await execute(
+                    ticket.extra.refund_address, str(ticket.extra.sats_paid)
+                )
+                if res:
+                    ticket.extra.refunded = True
+                    await update_ticket(ticket)
+            except Exception as e:
+                logger.error(f"Error refunding ticket {ticket.id}: {e}")

static/js/display.js

@@ -9,7 +9,8 @@ window.app = Vue.createApp({
         show: false,
         data: {
           name: '',
-          email: ''
+          email: '',
+          refund: ''
         }
       },
       ticketLink: {
@@ -29,7 +30,8 @@ window.app = Vue.createApp({
     this.info = event_info
     this.info = this.info.substring(1, this.info.length - 1)
     this.banner = event_banner
-    await this.purgeUnpaidTickets()
+    this.extra = event_extra
+    this.hasPromoCodes = has_promoCodes
   },
   computed: {
     formatDescription() {
@@ -41,6 +43,7 @@ window.app = Vue.createApp({
       e.preventDefault()
       this.formDialog.data.name = ''
       this.formDialog.data.email = ''
+      this.formDialog.data.refund = ''
     },
 
     closeReceiveDialog() {
@@ -60,12 +63,12 @@ window.app = Vue.createApp({
       const regex = /^[\w\.-]+@[a-zA-Z\d\.-]+\.[a-zA-Z]{2,}$/
       return regex.test(val) || 'Please enter valid email.'
     },
-
     Invoice() {
       axios
         .post(`/events/api/v1/tickets/${event_id}`, {
           name: this.formDialog.data.name,
-          email: this.formDialog.data.email
+          email: this.formDialog.data.email,
+          promo_code: this.formDialog.data.promo_code || null
         })
         .then(response => {
           this.paymentReq = response.data.payment_request
@@ -122,13 +125,6 @@ window.app = Vue.createApp({
           }, 2000)
         })
         .catch(LNbits.utils.notifyApiError)
-    },
-    async purgeUnpaidTickets() {
-      try {
-        await LNbits.api.request('GET', `/events/api/v1/purge/${event_id}`)
-      } catch (error) {
-        LNbits.utils.notifyApiError(error)
-      }
     }
   }
 })

static/js/index.js

@@ -1,9 +1,6 @@
 const mapEvents = function (obj) {
-  obj.date = Quasar.date.formatDate(
+  obj.date = LNbits.utils.formatTimestamp(obj.time)
-    new Date(obj.time * 1000),
+  obj.fsat = new Intl.NumberFormat(window.g.locale).format(obj.price_per_ticket)
-    'YYYY-MM-DD HH:mm'
-  )
-  obj.fsat = new Intl.NumberFormat(LOCALE).format(obj.price_per_ticket)
   obj.displayUrl = ['/events/', obj.id].join('')
   return obj
 }
@@ -20,8 +17,6 @@ window.app = Vue.createApp({
         columns: [
           {name: 'id', align: 'left', label: 'ID', field: 'id'},
           {name: 'name', align: 'left', label: 'Name', field: 'name'},
-          {name: 'info', align: 'left', label: 'Info', field: 'info'},
-          {name: 'banner', align: 'left', label: 'Banner', field: 'banner'},
           {
             name: 'event_start_date',
             align: 'left',
@@ -40,6 +35,17 @@ window.app = Vue.createApp({
             label: 'Ticket close',
             field: 'closing_date'
           },
+          {
+            name: 'canceled',
+            align: 'left',
+            label: 'Canceled',
+            field: row => {
+              if (row.extra.conditional && row.canceled) {
+                return 'Yes'
+              }
+              return 'No'
+            }
+          },
           {
             name: 'price_per_ticket',
             align: 'left',
@@ -65,7 +71,9 @@ window.app = Vue.createApp({
             align: 'left',
             label: 'Sold',
             field: 'sold'
-          }
+          },
+          {name: 'info', align: 'left', label: 'Info', field: 'info'},
+          {name: 'banner', align: 'left', label: 'Banner', field: 'banner'}
         ],
         pagination: {
           rowsPerPage: 10
@@ -73,7 +81,6 @@ window.app = Vue.createApp({
       },
       ticketsTable: {
         columns: [
-          {name: 'id', align: 'left', label: 'ID', field: 'id'},
           {name: 'event', align: 'left', label: 'Event', field: 'event'},
           {name: 'name', align: 'left', label: 'Name', field: 'name'},
           {name: 'email', align: 'left', label: 'Email', field: 'email'},
@@ -82,7 +89,14 @@ window.app = Vue.createApp({
             align: 'left',
             label: 'Registered',
             field: 'registered'
-          }
+          },
+          {
+            name: 'promo_code',
+            align: 'left',
+            label: 'Promo Code',
+            field: row => row.extra.applied_promo_code || ''
+          },
+          {name: 'id', align: 'left', label: 'ID', field: 'id'}
         ],
         pagination: {
           rowsPerPage: 10
@@ -90,7 +104,11 @@ window.app = Vue.createApp({
       },
       formDialog: {
         show: false,
-        data: {}
+        data: {
+          extra: {
+            promo_codes: []
+          }
+        }
       }
     }
   },
@@ -143,9 +161,10 @@ window.app = Vue.createApp({
           this.g.user.wallets[0].inkey
         )
         .then(response => {
-          this.events = response.data.map(function (obj) {
+          this.events = response.data.map(obj => {
             return mapEvents(obj)
           })
+          this.checkCanceledEvents()
         })
     },
     sendEventData() {
@@ -153,6 +172,11 @@ window.app = Vue.createApp({
         id: this.formDialog.data.wallet
       })
       const data = this.formDialog.data
+      if (data.extra && !data.extra.promo_codes) {
+        data.extra.promo_codes = data.extra.promo_codes
+          .filter(code => code.trim() !== '')
+          .map(code => code.trim().toUpperCase())
+      }
 
       if (data.id) {
         this.updateEvent(wallet, data)
@@ -161,20 +185,41 @@ window.app = Vue.createApp({
       }
     },
 
+    openEventDialog(data = false) {
+      if (data && data.id) {
+        this.formDialog.data = {...data}
+      } else {
+        this.formDialog.data = {
+          extra: {
+            conditional: false,
+            min_tickets: 1,
+            promo_codes: []
+          }
+        }
+      }
+      this.formDialog.show = true
+    },
+    resetEventDialog() {
+      this.formDialog.show = false
+      this.formDialog.data = {
+        extra: {
+          promo_codes: []
+        }
+      }
+    },
+
     createEvent(wallet, data) {
       LNbits.api
         .request('POST', '/events/api/v1/events', wallet.adminkey, data)
         .then(response => {
           this.events.push(mapEvents(response.data))
-          this.formDialog.show = false
+          this.resetEventDialog()
-          this.formDialog.data = {}
         })
         .catch(LNbits.utils.notifyApiError)
     },
     updateformDialog(formId) {
       const link = _.findWhere(this.events, {id: formId})
-      this.formDialog.data = {...link}
+      this.openEventDialog(link)
-      this.formDialog.show = true
     },
     updateEvent(wallet, data) {
       LNbits.api
@@ -189,8 +234,7 @@ window.app = Vue.createApp({
             return obj.id == data.id
           })
           this.events.push(mapEvents(response.data))
-          this.formDialog.show = false
+          this.resetEventDialog()
-          this.formDialog.data = {}
         })
         .catch(LNbits.utils.notifyApiError)
     },
@@ -216,6 +260,30 @@ window.app = Vue.createApp({
     },
     exporteventsCSV() {
       LNbits.utils.exportCSV(this.eventsTable.columns, this.events)
+    },
+    async checkCanceledEvents() {
+      const events = this.events
+        .filter(event => event.extra.conditional)
+        .filter(e => !e.canceled)
+      if (!events.length) return
+      const now = new Date()
+      events.forEach(async ev => {
+        if (new Date(ev.closing_date) < now && ev.sold < ev.extra.min_tickets) {
+          const {data} = await LNbits.api.request(
+            'PUT',
+            '/events/api/v1/events/' + ev.id + '/cancel',
+            _.findWhere(this.g.user.wallets, {id: ev.wallet}).adminkey
+          )
+          Quasar.Notify.create({
+            type: 'warning',
+            message: `Event ${ev.name} has been canceled and refunds have been issued.`,
+            icon: null
+          })
+          this.events = this.events.map(e =>
+            e.id === ev.id ? mapEvents(data) : e
+          )
+        }
+      })
     }
   },
   async created() {

templates/events/display.html

@@ -6,7 +6,7 @@
       <q-card-section class="q-pa-none">
         <h3 class="q-my-none q-pa-lg">{{ event_name }}</h3>
         <br />
-        <div v-html="formatDescription"></div>
+        <div v-html="formatDescription" class="q-pa-md"></div>
         <br />
       </q-card-section>
     </q-card>
@@ -30,7 +30,23 @@
             :rules="[val => !!val || '* Required', val => emailValidation(val)]"
             lazy-rules
           ></q-input>
-
+          <q-input
+            v-if="this.extra?.conditional"
+            filled
+            dense
+            v-model.trim="formDialog.data.refund"
+            label="Refund lnadress or LNURL "
+            :rules="[val => !!val || '* Required']"
+            lazy-rules
+            :hint="`If minimum tickets (${this.extra?.min_tickets}) are not met, refund will be sent.`"
+          ></q-input>
+          <q-input
+            v-if="hasPromoCodes"
+            filled
+            dense
+            v-model.trim="formDialog.data.promo_code"
+            label="Apply Promo Code "
+          ></q-input>
           <div class="row q-mt-lg">
             <q-btn
               unelevated
@@ -93,6 +109,8 @@
   const event_name = '{{ event_name }}'
   const event_info = '{{ event_info | tojson }}'
   const event_banner = JSON.parse('{{ event_banner | tojson | safe }}')
+  const event_extra = JSON.parse('{{ event_extra | safe }}')
+  const has_promoCodes = {{ has_promo_codes | tojson }}
 </script>
 <script src="{{ static_url_for('events/static', path='js/display.js') }}"></script>
 {% endblock %}

templates/events/index.html

@@ -4,7 +4,7 @@
   <div class="col-12 col-md-8 col-lg-7 q-gutter-y-md">
     <q-card>
       <q-card-section>
-        <q-btn unelevated color="primary" @click="formDialog.show = true"
+        <q-btn unelevated color="primary" @click="openEventDialog"
           >New Event</q-btn
         >
       </q-card-section>
@@ -33,7 +33,7 @@
           <template v-slot:header="props">
             <q-tr :props="props">
               <q-th auto-width></q-th>
-
+              <q-th auto-width></q-th>
               <q-th v-for="col in props.cols" :key="col.name" :props="props">
                 <span v-text="col.label"></span>
               </q-th>
@@ -43,6 +43,16 @@
           </template>
           <template v-slot:body="props">
             <q-tr :props="props">
+              <q-td auto-width>
+                <q-btn
+                  size="sm"
+                  color="accent"
+                  round
+                  dense
+                  @click="props.expand = !props.expand"
+                  :icon="props.expand ? 'expand_less' : 'expand_more'"
+                />
+              </q-td>
               <q-td auto-width>
                 <q-btn
                   unelevated
@@ -89,6 +99,52 @@
                 ></q-btn>
               </q-td>
             </q-tr>
+            <q-tr v-show="props.expand" :props="props">
+              <q-td colspan="100%">
+                <div class="q-pa-md">
+                  <div class="text-subtitle1 q-mb-md">Promo codes</div>
+                  <div class="column">
+                    <div
+                      v-if="props.row.extra.promo_codes.length == 0"
+                      class="text-caption"
+                    >
+                      No promo codes for this event.
+                    </div>
+                    <div
+                      v-for="(code, index) in props.row.extra.promo_codes"
+                      :key="index"
+                      class="row items-center q-col-gutter-sm q-mb-sm"
+                    >
+                      <div class="col-auto">
+                        <q-chip
+                          square
+                          size="md"
+                          clickable
+                          @click="utils.copyText(code.code.toUpperCase())"
+                        >
+                          <q-avatar
+                            icon="bookmark"
+                            :color="code.active ? 'green' : 'grey'"
+                            text-color="white"
+                          ></q-avatar>
+                          <span v-text="code.code.toUpperCase()"></span>
+                        </q-chip>
+                      </div>
+                      <div class="col-auto">
+                        Discount: <span v-text="code.discount_percent"></span>%
+                      </div>
+                      <div class="col-auto">
+                        Status:
+                        <span
+                          :class="code.active ? 'text-green' : 'text-grey'"
+                          v-text="code.active ? 'Active' : 'Inactive'"
+                        ></span>
+                      </div>
+                    </div>
+                  </div>
+                </div>
+              </q-td>
+            </q-tr>
           </template>
         </q-table>
       </q-card-section>
@@ -224,7 +280,6 @@
             ></q-input>
           </div>
         </div>
-
         <div class="row">
           <div class="col-4">Event begins</div>
           <div class="col-8">
@@ -248,7 +303,6 @@
             ></q-input>
           </div>
         </div>
-
         <div class="row q-col-gutter-sm">
           <div class="col">
             <q-select
@@ -280,9 +334,101 @@
               :mask="formDialog.data.currency != 'sats' ? '#.##' : '#'"
               fill-mask="0"
               reverse-fill-mask
+              :disable="formDialog.data.currency == null"
             ></q-input>
           </div>
         </div>
+        <q-expansion-item
+          group="advanced"
+          icon="settings"
+          label="Advanced options"
+        >
+          <div class="row q-mt-lg">
+            <div class="text-subtitle1 q-mb-md">Conditional Events</div>
+            <div class="text-caption">
+              Make this event conditional if
+              <strong>minimum tickets</strong> are sold. User will be asked to
+              provide a Lightning Address or LNURL pay for refunds.
+            </div>
+            <div class="col-8">
+              <q-toggle
+                v-model="formDialog.data.extra.conditional"
+                label="Conditional Event"
+                left-label
+              ></q-toggle>
+            </div>
+            <div class="col-4">
+              <q-input
+                filled
+                dense
+                v-model.number="formDialog.data.extra.min_tickets"
+                type="number"
+                label="Minimum Tickets"
+                :disable="!formDialog.data.extra.conditional"
+              ></q-input>
+            </div>
+          </div>
+          <q-separator class="q-my-md"></q-separator>
+          <div class="text-subtitle1 q-mb-md">Promo Codes</div>
+          <div class="text-caption">
+            Allow users to enter a promo code for discounts.
+          </div>
+
+          <div
+            v-for="(code, index) in formDialog.data.extra.promo_codes"
+            :key="index"
+            class="row q-col-gutter-sm q-mt-md"
+          >
+            <q-input
+              class="col-8"
+              filled
+              dense
+              v-model.trim="formDialog.data.extra.promo_codes[index].code"
+              type="text"
+              label="Promo Code"
+            >
+              <template v-slot:before>
+                <q-checkbox
+                  left-label
+                  v-model="formDialog.data.extra.promo_codes[index].active"
+                  checked-icon="radio_button_checked"
+                  unchecked-icon="radio_button_unchecked"
+                ></q-checkbox>
+                <q-tooltip>
+                  <span
+                    v-text="formDialog.data.extra.promo_codes[index].active ? 'Active' : 'Inactive'"
+                  ></span>
+                </q-tooltip>
+              </template>
+            </q-input>
+            <q-input
+              class="col-4"
+              filled
+              dense
+              v-model.number="formDialog.data.extra.promo_codes[index].discount_percent"
+              type="number"
+              label="Discount (%)"
+              min="0"
+              max="100"
+            >
+              <template v-slot:after>
+                <q-btn
+                  round
+                  dense
+                  flat
+                  icon="delete"
+                  @click="formDialog.data.extra.promo_codes.splice(index, 1)"
+                ></q-btn>
+              </template>
+            </q-input>
+          </div>
+          <div class="col-12 q-mt-md">
+            <q-btn
+              @click="formDialog.data.extra.promo_codes.push({code: '', discount_percent: 0, active: true})"
+              >Add Promo Code</q-btn
+            >
+          </div>
+        </q-expansion-item>
 
         <div class="row q-mt-lg">
           <q-btn

views.py

@@ -8,7 +8,8 @@ from lnbits.helpers import template_renderer
 from starlette.exceptions import HTTPException
 from starlette.responses import HTMLResponse
 
-from .crud import get_event, get_ticket
+from .crud import get_event, get_ticket, purge_unpaid_tickets, update_event
+from .services import refund_tickets
 
 events_generic_router = APIRouter()
 
@@ -32,6 +33,15 @@ async def display(request: Request, event_id):
             status_code=HTTPStatus.NOT_FOUND, detail="Event does not exist."
         )
 
+    await purge_unpaid_tickets(event_id)
+
+    is_window_open = (
+        date.today() < datetime.strptime(event.closing_date, "%Y-%m-%d").date()
+    )
+    is_min_tickets_met = (
+        event.sold >= event.extra.min_tickets if event.extra.conditional else True
+    )
+
     if event.amount_tickets < 1:
         return events_renderer().TemplateResponse(
             "events/error.html",
@@ -41,8 +51,20 @@ async def display(request: Request, event_id):
                 "event_error": "Sorry, tickets are sold out :(",
             },
         )
-    datetime_object = datetime.strptime(event.closing_date, "%Y-%m-%d").date()
+    if event.extra.conditional and not is_min_tickets_met and not is_window_open:
-    if date.today() > datetime_object:
+        event.canceled = True
+        await update_event(event)
+        await refund_tickets(event_id)
+
+        return events_renderer().TemplateResponse(
+            "events/error.html",
+            {
+                "request": request,
+                "event_name": event.name,
+                "event_error": "Sorry, event was cancelled.",
+            },
+        )
+    if not is_window_open:
         return events_renderer().TemplateResponse(
             "events/error.html",
             {
@@ -52,6 +74,12 @@ async def display(request: Request, event_id):
             },
         )
 
+    if len(event.extra.promo_codes) > 0:
+        has_promo_codes = True
+    else:
+        has_promo_codes = False
+
+    event.extra.promo_codes = []
     return events_renderer().TemplateResponse(
         "events/display.html",
         {
@@ -61,6 +89,8 @@ async def display(request: Request, event_id):
             "event_info": event.info,
             "event_price": event.price_per_ticket,
             "event_banner": event.banner,
+            "event_extra": event.extra.json(),
+            "has_promo_codes": has_promo_codes,
         },
     )
 

views_api.py

@@ -26,12 +26,11 @@ from .crud import (
     get_events,
     get_ticket,
     get_tickets,
-    purge_unpaid_tickets,
     update_event,
     update_ticket,
 )
 from .models import CreateEvent, CreateTicket, Ticket
-from .services import set_ticket_paid
+from .services import refund_tickets, set_ticket_paid
 
 events_api_router = APIRouter()
 
@@ -77,6 +76,26 @@ async def api_event_create(
     return event.dict()
 
 
+@events_api_router.put("/api/v1/events/{event_id}/cancel")
+async def api_event_cancel(
+    event_id: str,
+    wallet: WalletTypeInfo = Depends(require_admin_key),
+):
+    event = await get_event(event_id)
+    if not event:
+        raise HTTPException(
+            status_code=HTTPStatus.NOT_FOUND, detail="Event does not exist."
+        )
+
+    if event.wallet != wallet.wallet.id:
+        raise HTTPException(status_code=HTTPStatus.FORBIDDEN, detail="Not your event.")
+    event.canceled = True
+    event = await update_event(event)
+    await refund_tickets(event.id)
+
+    return event.dict()
+
+
 @events_api_router.delete("/api/v1/events/{event_id}")
 async def api_form_delete(
     event_id: str, wallet: WalletTypeInfo = Depends(require_admin_key)
@@ -116,11 +135,15 @@ async def api_tickets(
 async def api_ticket_create(event_id: str, data: CreateTicket):
     name = data.name
     email = data.email
-    return await api_ticket_make_ticket(event_id, name, email)
+    promo_code = data.promo_code.upper() if data.promo_code else None
+    refund_address = data.refund_address
+    return await api_ticket_make_ticket(
+        event_id, name, email, promo_code, refund_address
+    )
 
 
 @events_api_router.get("/api/v1/tickets/{event_id}/{name}/{email}")
-async def api_ticket_make_ticket(event_id, name, email):
+async def api_ticket_make_ticket(event_id, name, email, promo_code, refund_address):
     event = await get_event(event_id)
     if not event:
         raise HTTPException(
@@ -130,14 +153,25 @@ async def api_ticket_make_ticket(event_id, name, email):
     price = event.price_per_ticket
     extra = {"tag": "events", "name": name, "email": email}
 
-    if event.currency != "sats":
+    if promo_code:
-        price = await fiat_amount_as_satoshis(event.price_per_ticket, event.currency)
+        # check if promo_code exists in event.extra.promo_codes
+        if promo_code not in [pc.code for pc in event.extra.promo_codes]:
+            raise HTTPException(
+                status_code=HTTPStatus.BAD_REQUEST, detail="Invalid promo code."
+            )
+        # get the promocode
+        promo = next(pc for pc in event.extra.promo_codes if pc.code == promo_code)
+        extra["promo_code"] = promo.code
+        price = event.price_per_ticket * (1 - promo.discount_percent / 100)
 
+    if event.currency != "sats":
         extra["fiat"] = True
         extra["currency"] = event.currency
-        extra["fiatAmount"] = event.price_per_ticket
+        extra["fiatAmount"] = price
         extra["rate"] = await get_fiat_rate_satoshis(event.currency)
 
+        price = await fiat_amount_as_satoshis(price, event.currency)
+
     try:
         payment = await create_invoice(
             wallet_id=event.wallet,
@@ -151,6 +185,11 @@ async def api_ticket_make_ticket(event_id, name, email):
             event=event.id,
             name=name,
             email=email,
+            extra={
+                "applied_promo_code": promo_code,
+                "refund_address": refund_address,
+                "sats_paid": int(price),
+            },
         )
     except Exception as exc:
         raise HTTPException(
@@ -176,16 +215,31 @@ async def api_ticket_send_ticket(event_id, payment_hash):
         )
     payment = await get_standalone_payment(payment_hash, incoming=True)
     assert payment
+
+    if ticket.extra.applied_promo_code:
+        promo = next(
+            (
+                pc
+                for pc in event.extra.promo_codes
+                if pc.code == ticket.extra.applied_promo_code
+            ),
+            None,
+        )
+        if promo:
+            event.price_per_ticket *= 1 - promo.discount_percent / 100
+
     price = (
         event.price_per_ticket * 1000
         if event.currency == "sats"
         else await fiat_amount_as_satoshis(event.price_per_ticket, event.currency)
         * 1000
     )
+
     # check if price is equal to payment.amount
     lower_bound = price * 0.99  # 1% decrease
 
     if not payment.pending and abs(payment.amount) >= lower_bound:  # allow 1% error
+        ticket.extra.sats_paid = int(payment.amount / 1000)
         await set_ticket_paid(ticket)
         return {"paid": True, "ticket_id": ticket.id}
 
@@ -208,17 +262,6 @@ async def api_ticket_delete(
     await delete_ticket(ticket_id)
 
 
-# TODO: DELETE, updates db! @tal
-@events_api_router.get("/api/v1/purge/{event_id}")
-async def api_event_purge_tickets(event_id: str):
-    event = await get_event(event_id)
-    if not event:
-        raise HTTPException(
-            status_code=HTTPStatus.NOT_FOUND, detail="Event does not exist."
-        )
-    return await purge_unpaid_tickets(event_id)
-
-
 @events_api_router.get("/api/v1/eventtickets/{event_id}")
 async def api_event_tickets(event_id: str) -> list[Ticket]:
     return await get_event_tickets(event_id)