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<h1>Example Extension</h1>
<h2>*tagline*</h2>
This is an example extension to help you organise and build you own.
Try to include an image
<img src="https://i.imgur.com/9i4xcQB.png">
<h2>If your extension has API endpoints, include useful ones here</h2>
<code>curl -H "Content-type: application/json" -X POST https://YOUR-LNBITS/YOUR-EXTENSION/api/v1/EXAMPLE -d '{"amount":"100","memo":"example"}' -H "X-Api-Key: YOUR_WALLET-ADMIN/INVOICE-KEY"</code>

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import asyncio
from fastapi import APIRouter
from fastapi.staticfiles import StaticFiles
from lnbits.db import Database
from lnbits.helpers import template_renderer
from lnbits.tasks import catch_everything_and_restart
db = Database("ext_example")
example_ext: APIRouter = APIRouter(prefix="/example", tags=["example"])
example_static_files = [
{
"path": "/example/static",
"app": StaticFiles(packages=[("lnbits", "extensions/example/static")]),
"name": "example_static",
}
]
def example_renderer():
return template_renderer(["lnbits/extensions/example/templates"])
from .tasks import wait_for_paid_invoices
from .views import * # noqa: F401,F403
from .views_api import * # noqa: F401,F403
def tpos_start():
loop = asyncio.get_event_loop()
loop.create_task(catch_everything_and_restart(wait_for_paid_invoices))

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{
"name": "Build your own!",
"short_description": "Extension building guide",
"tile": "/example/static/bitcoin-extension.png",
"contributors": ["github_username"]
}

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# crud.py is for communication with your extensions database
# add your dependencies here
# add your fnctions here

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# migrations.py is for building your database
# async def m001_initial(db):
# await db.execute(
# f"""
# CREATE TABLE example.example (
# id TEXT PRIMARY KEY,
# wallet TEXT NOT NULL,
# time TIMESTAMP NOT NULL DEFAULT {db.timestamp_now}
# );
# """
# )

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# from pydantic import BaseModel
# class Example(BaseModel):
# id: str
# wallet: str

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# tasks.py is for asynchronous when invoices get paid
# add your dependencies here
import asyncio
from loguru import logger
from lnbits.core.models import Payment
from lnbits.helpers import get_current_extension_name
from lnbits.tasks import register_invoice_listener
async def wait_for_paid_invoices():
invoice_queue = asyncio.Queue()
register_invoice_listener(invoice_queue, get_current_extension_name())
while True:
payment = await invoice_queue.get()
await on_invoice_paid(payment)
async def on_invoice_paid(payment: Payment) -> None:
if (
payment.extra.get("tag") != "example"
): # Will grab any payment with the tag "example"
logger.debug(payment)
# Do something
return

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{% extends "base.html" %} {% from "macros.jinja" import window_vars with context
%} {% block page %}
<q-dialog v-model="thingDialog.show" position="top">
<q-card class="q-pa-lg q-pt-xl lnbits__dialog-card">
<q-form @submit="sendThingDialog" class="q-gutter-md">
<q-input
filled
dense
v-model.trim="thingDialog.data.name"
type="text"
label="Name *"
></q-input>
<q-input
filled
dense
v-model.trim="thingDialog.data.email"
type="email"
label="Name *"
></q-input>
<q-select
filled
dense
emit-value
v-model="thingDialog.data.wallet"
:options="g.user.walletOptions"
label="Wallet *"
></q-select>
<div class="row q-mt-lg">
<q-btn
v-if="thingDialog.data.id"
unelevated
color="primary"
type="submit"
>Update thing</q-btn
>
<q-btn
v-else
unelevated
color="primary"
:disable="thingDialog.data.name == null"
type="submit"
>Create thing</q-btn
>
<q-btn v-close-popup flat color="grey" class="q-ml-auto">Cancel</q-btn>
</div>
</q-form>
</q-card>
</q-dialog>
<q-card flat>
<q-card-section>
<div class="text-h5 q-mb-md">
Extension Development Guide
<small
>(also check the
<a
class="text-primary"
href="http://docs.lnbits.org/devs/development.html"
>docs</a
>)</small
>
</div>
<q-card unelevated flat>
<q-tabs
v-model="tab"
dense
class="text-grey"
active-color="primary"
indicator-color="primary"
align="justify"
narrow-indicator
>
<q-tab name="frameworks" label="Frameworks"></q-tab>
<q-tab name="tools" label="Useful Tools"></q-tab>
<q-tab name="goodpractice" label="Good Practice"></q-tab>
<q-tab name="enviroment" label="Dev Enviroment"></q-tab>
<q-tab name="submission" label="Submisson to LNbits repo"></q-tab>
</q-tabs>
<q-separator></q-separator>
<q-tab-panels v-model="tab">
<q-tab-panel name="frameworks">
<div class="text-h6">Frameworks</div>
<div>
<template>
<q-tabs align="left" v-model="framworktab" inline-label>
<q-tab name="fastapi"
><img src="./static/fastapi-framework.png" />FASTAPI</q-tab
>
<q-tab name="quasar"
><img src="./static/quasar-framework.png" />QUASAR</q-tab
>
<q-tab name="vuejs"
><img src="./static/vuejs-framework.png" />VUE-JS</q-tab
>
</q-tabs>
</template>
<template>
<q-tab-panels v-model="framworktab">
<q-tab-panel name="fastapi" class="text-body1">
<a href="https://fastapi.tiangolo.com/"
><img src="./static/fastapilogo.png"
/></a>
<p>
LNbits API is built using
<a href="https://fastapi.tiangolo.com/" class="text-primary"
>FastAPI</a
>, a high-performance, easy to code API framework.<br /><br />
FastAPI auto-generates swagger UI docs for testing endpoints
<a class="text-primary" href="../docs">/docs</a>
</p>
<i>
<strong>TIP:</strong> Although it is possible for extensions
to use other extensions API endpoints (such as with the
Satspay and Onchain extension), ideally an extension should
only use LNbits
<a href="../docs#/default" class="text-primary">core</a>
endpoints. </i
><br /><br />
<code class="bg-grey-3 text-black">views.py</code> is used for
setting application routes:
<img src="./static/fastapi-example.png" /><br /><br />
<code class="bg-grey-3 text-black">views_api.py</code> is used
for setting application API endpoints:<br />
<img src="./static/fastapi-example2.png" />
</q-tab-panel>
<q-tab-panel name="quasar" class="text-body1">
<a href="https://quasar.dev/"
><img src="./static/quasarlogo.png"
/></a>
<p>
LNbits uses
<a class="text-primary" href="https://quasar.dev/"
>Quasar Framework</a
>
for frontend deisgn elements. Quasar Framework is an
open-source Vue.js based framework for building apps.
</p>
<i>
<strong>TIP:</strong> Look through
<code class="bg-grey-3 text-black">/template</code> files in
other extensions for examples of Quasar elements being used. </i
><br /><br />
<p>
In the below example we make a dialogue popup box (box can
be triggered
<q-btn
size="sm"
color="primary"
@click="thingDialog.show = true"
>here</q-btn
>): <q-tooltip>Exmple of a tooltip!</q-tooltip>
</p>
<img src="./static/quasar-example.png" /><br /><br />
<div class="text-h6">Useful links:</div>
<q-btn
color="primary"
type="a"
href="https://quasar.dev/style/"
>Style (typography, spacing, etc)</q-btn
>
<q-btn
color="primary"
type="a"
href="https://quasar.dev/vue-components/"
>Genral components (cards, buttons, popup dialogs,
etc)</q-btn
>
<q-btn
color="primary"
type="a"
href="https://quasar.dev/layout/grid"
>Layouts (rows/columns, flexbox)</q-btn
>
</q-tab-panel>
<q-tab-panel
v-if="someBool == true"
name="vuejs"
class="text-body1"
>
<a href="https://vuejs.org/">
<img src="./static/vuejslogo.png"
/></a>
<p>
LNbits uses
<a href="https://vuejs.org/" class="text-primary">Vue</a>
for best-in-class, responsive and high-performance
components.
</p>
<p>Typical example of Vue components in a frontend script:</p>
<img
src="./static/script-example.png"
style="max-width: 800px"
/><br /><br />
<p>
Content can be conditionally rendered using Vue's
<code class="bg-grey-3 text-black">v-if</code>:
</p>
<img
src="./static/vif-example.png"
style="max-width: 800px"
/>
</q-tab-panel>
</q-tab-panels>
</template>
</div>
</q-tab-panel>
<q-tab-panel name="tools">
<div class="text-h6">Useful Tools</div>
<div>
<template>
<q-tabs v-model="usefultab" align="left">
<q-tab name="magicalg">MAGICAL G</q-tab>
<q-tab name="exchange">EXCHANGE RATES</q-tab>
<q-tab name="qrcodes">QR CODES</q-tab>
<q-tab name="websockets">WEBSOCKETS</q-tab>
</q-tabs>
</template>
<template>
<q-tab-panels v-model="usefultab">
<q-tab-panel name="magicalg" class="text-body1">
<div class="text-h5 q-mb-md">Magical G</div>
<p>
A magical "g" (ie
<code class="bg-grey-3 text-black"
>this.g.user.wallets[0].inkey</code
>) is always available, with info about the user, wallets
and extensions:
</p>
<code class="text-caption">{% raw %}{{ g }}{% endraw %}</code>
</q-tab-panel>
<q-tab-panel name="exchange">
<div class="text-h6">Exchange rates</div>
<p>
LNbits includes a handy
<a
href="../docs#/default/api_fiat_as_sats_api_v1_conversion_post"
class="text-primary"
>exchange rate function</a
>, that streams rates from 6 different sources.
</p>
Exchange rate API:<br />
<img src="./static/conversion-example.png" /><br /><br />
Exchange rate functions, included using
<code class="bg-grey-3 text-black"
>from lnbits.utils.exchange_rates import
fiat_amount_as_satoshis</code
>:<br />
<img src="./static/conversion-example2.png" />
</q-tab-panel>
<q-tab-panel name="qrcodes" class="text-body1">
<div class="text-h5 q-mb-md">QR Codes</div>
<p>
For most purposes use Quasar's inbuilt VueQrcode library:
</p>
<img src="./static/qrcode-example1.png" />
<p>
LNbits does also include a handy
<a
href="../docs#/default/img_api_v1_qrcode__data__get"
class="text-primary"
>
QR code enpoint</a
>
</p>
{% raw %} You can use via
<a
href="/api/v1/qrcode/some-data-you-want-in-a-qrcode"
class="text-primary"
>{{protocol + location}}{% endraw
%}/api/v1/qrcode/some-data-you-want-in-a-qrcode:</a
><br />
<br />
<img src="./static/qrcode-example.png" />
<br />
<img
class="bg-white"
width="300px"
src="/api/v1/qrcode/some-data-you-want-in-a-qrcode"
/>
<br />
</q-tab-panel>
<q-tab-panel name="websockets" class="text-body1">
<div class="text-h5 q-mb-md">Websockets</div>
<p>
Fastapi includes a great
<a
class="text-primary"
href="https://fastapi.tiangolo.com/advanced/websockets/#websockets-client"
>websocket tool</a
>
</p>
{% raw %}
<p>
A few LNbits extensions also make use of a weird and useful
websocket/GET tool built into LNbits, such as extensions
Copilot and LNURLDevices<br />
You can subscribe to websocket with
<code class="bg-grey-3 text-black"
>wss:{{location}}/api/v1/ws/{SOME-ID}</code
><br />
You can post to any clients subscribed to the endpoint with
<code class="bg-grey-3 text-black"
>{{protocol +
location}}/api/v1/ws/{SOME-ID}/{THE-DATA-YOU-WANT-TO-POST}</code
><br />
<br />
<strong
><div id="text-to-change">
DEMO: Hit
<a
target="_blank"
href="/api/v1/ws/32872r23g29/blah%20blah%20blah"
class="text-primary"
>{{protocol +
location}}/api/v1/ws/32872r23g29/blah%20blah%20blah</a
>
in a different browser window to change this text to
`blah blah blah`.
</div></strong
>
<br />
Function used in this demo:<br />
<img src="./static/websocket-example.png" /></p
></q-tab-panel>
{% endraw %}
</q-tab-panels>
</template>
</div>
</q-tab-panel>
<q-tab-panel name="goodpractice">
<div class="text-h6">Good Practice</div>
Coming soon...
</q-tab-panel>
<q-tab-panel name="enviroment">
<div class="text-h6">Dev Enviroment</div>
Coming soon...
</q-tab-panel>
<q-tab-panel name="submission">
<div class="text-h6">Submission</div>
Coming soon...
</q-tab-panel>
</q-tab-panels>
</q-card>
</q-card-section>
</q-card>
{% endblock %} {% block scripts %} {{ window_vars(user) }}
<script>
var someMapObject = obj => {
obj._data = _.clone(obj)
obj.date = Quasar.utils.date.formatDate(
new Date(obj.time * 1000),
'YYYY-MM-DD HH:mm'
)
// here you can do something with the mapped data
return obj
}
new Vue({
el: '#vue',
mixins: [windowMixin],
data: function () {
return {
///// Declare models/variables /////
protocol: window.location.protocol,
location: '//' + window.location.hostname,
thingDialog: {
show: false,
data: {}
},
someBool: true,
splitterModel: 20,
exampleData: [],
tab: 'frameworks',
framworktab: 'fastapi',
usefultab: 'magicalg'
}
},
///// Where functions live /////
methods: {
exampleFunction: function (data) {
var theData = data
LNbits.api
.request(
'GET', // Type of request
'/example/api/v1/test/' + theData, // URL of the endpoint
this.g.user.wallets[0].inkey // Often endpoints require a key
)
.then(response => {
this.exampleData = response.data.map(someMapObject) // Often whats returned is mapped onto some model
})
.catch(error => {
LNbits.utils.notifyApiError(error) // Error will be passed to the frontend
})
},
initWs: async function () {
if (location.protocol !== 'http:') {
localUrl =
'wss://' +
document.domain +
':' +
location.port +
'/api/v1/ws/32872r23g29'
} else {
localUrl =
'ws://' +
document.domain +
':' +
location.port +
'/api/v1/ws/32872r23g29'
}
this.ws = new WebSocket(localUrl)
this.ws.addEventListener('message', async ({data}) => {
const res = data.toString()
document.getElementById('text-to-change').innerHTML = res
})
},
sendThingDialog() {
console.log(this.thingDialog)
}
},
///// To run on startup /////
created: function () {
self = this // Often used to run a real object, rather than the event (all a bit confusing really)
self.exampleFunction('lorum')
self.initWs()
}
})
</script>
{% endblock %}

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from fastapi import Depends, Request
from fastapi.templating import Jinja2Templates
from starlette.responses import HTMLResponse
from lnbits.core.models import User
from lnbits.decorators import check_user_exists
from . import example_ext, example_renderer
templates = Jinja2Templates(directory="templates")
@example_ext.get("/", response_class=HTMLResponse)
async def index(
request: Request,
user: User = Depends(check_user_exists),
):
return example_renderer().TemplateResponse(
"example/index.html", {"request": request, "user": user.dict()}
)

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# views_api.py is for you API endpoints that could be hit by another service
# add your dependencies here
from . import example_ext
# add your endpoints here
@example_ext.get("/api/v1/test/{test_data}")
async def api_example(test_data):
# Do some python things and return the data
return test_data