move qr to helper, add do limit checks, donation info

app/helpers.py

@@ -1,3 +1,6 @@
+from io import BytesIO
+from base64 import b64encode
+from qrcode import make as qrcode_make
 from app.models import Operation
 from app.library.digitalocean import do
 from app.factory import db
@@ -11,6 +14,12 @@ def to_ausd(amount):
 def from_ausd(amount):
     return amount / 1000000
 
+def generate_qr(xmr_address, tx_description):
+    _address_qr = BytesIO()
+    qr_uri = f'monero:{xmr_address}?tx_description="{tx_description}"'
+    qrcode_make(qr_uri).save(_address_qr)
+    qrcode = b64encode(_address_qr.getvalue()).decode()
+    return qrcode
 
 def cancel_operation(codename):
     op = Operation.query.filter(

app/library/digitalocean.py

@@ -24,6 +24,11 @@ class DigitalOcean(object):
         r.raise_for_status()
         return r
 
+    # Account meta
+    def show_account(self):
+        r = self.make_req('get', 'account')
+        return r.json()['account']
+
     # Domains and records
     def create_record(self, name, ip_addr, type='A'):
         data = {

app/routes/meta.py

@@ -1,5 +1,6 @@
 from flask import Blueprint, render_template, request
 from app.models import Operation
+from app.helpers import generate_qr
 from app import config
 
 
@@ -20,10 +21,14 @@ def index():
 
 @bp.route('/info')
 def info():
+    qrcode = generate_qr(
+        config.PAYOUT_ADDRESS, "Donation to @lza_menace on xmrcannon.net"
+    )
     return render_template(
         'info.html',
         prices=Operation().get_pricing(),
-        config=config
+        config=config,
+        qrcode=qrcode
     )
 
 

app/routes/operation.py

@@ -1,10 +1,9 @@
-from io import BytesIO
-from base64 import b64encode
-from qrcode import make as qrcode_make
 from flask import Blueprint, render_template, request, redirect, url_for, flash
 from app.library.monero import wallet
+from app.library.digitalocean import do
 from app.library.cache import cache
 from app.forms import CreateOperation
+from app.helpers import generate_qr
 from app.factory import db
 from app.models import Operation, Payout
 from app import config
@@ -18,10 +17,17 @@ def launchpad():
     enabled = config.LAUNCHPAD_ENABLED == True
     if enabled is False:
         flash(
-            'New launches have been disabled for the time being.'
+            'New launches have been disabled by the administrator for the time being.'
             ' Try again later!'
         )
         return redirect(url_for('meta.index'))
+    op_count = Operation.query.filter(
+        Operation.droplet_id > 0
+    ).count()
+    op_limit = do.show_account()['droplet_limit']
+    if op_count >= op_limit:
+        flash('Maximum number of nodes in orbit already. Try again later!')
+        return redirect(url_for('meta.index'))
     form = CreateOperation(request.form)
     if form.validate_on_submit():
         op = Operation.query.filter(
@@ -48,10 +54,6 @@ def view_operation(id):
     op = Operation.query.get(id)
     if op:
         all_transfers = list()
-        _address_qr = BytesIO()
-        qr_uri = f'monero:{op.address}?tx_description={op.codename}'
-        qrcode_make(qr_uri).save(_address_qr)
-        qrcode = b64encode(_address_qr.getvalue()).decode()
         txes = cache.get_transfers(op.account_idx)
         for type in txes:
             for tx in txes[type]:
@@ -60,6 +62,7 @@ def view_operation(id):
         last_payout = Payout.query.filter(
             Payout.operation_id == op.id
         ).order_by(Payout.create_date.desc()).first()
+        qrcode = generate_qr(op.address, f"Launching operation {op.id} on xmrcannon.net")
         return render_template(
             'view_operation.html',
             op=op,

app/templates/index.html

@@ -21,7 +21,7 @@
     <section class="hero is-light">
   		<div class="hero-body">
         <div class="container center">
-          <h1>Nodes in Orbit</h1>
+          <h1>{{ funded_ops.count() }} Nodes in Orbit</h1>
 					<br />
 					{% if funded_ops %}
 					<table class="table center">

app/templates/info.html

@@ -25,13 +25,22 @@
             <li>Prices are determined using the CoinGecko crypto market API.</li>
             <li>If no more funds are left the node will be destroyed.</li>
             <li>I will leave the operation available to refill for a few days.</li>
-            <li>You need to send at least ~{{ prices['minimum_xmr'] }} XMR to launch the node (this fluctuates).</li>
+            <li>You need to send at least ~{{ prices['minimum_xmr'] | round(4) }} XMR to launch the node (this fluctuates).</li>
           </ol>
           <br />
           <br />
 
   				<h1>Pricing Details</h1>
           {% include 'includes/pricing_details.html' %}
+					<br />
+					<br />
+
+					<h1>Donation Info</h1>
+					<p>Donations will help me ramp up operations and scale out to more nodes since the pricing is mostly break-even (except for small maintenance fee).</p>
+					<p>XMR Address: {{ config.PAYOUT_ADDRESS }}</p>
+					<br />
+					<img src="data:image/png;base64,{{ qrcode }}" width=200 class="center">
+
         </div>
   		</div>
   	</section>

app/templates/view_operation.html

@@ -67,7 +67,7 @@
 							<li>Prices are determined using the CoinGecko crypto market API.</li>
 							<li>If no more funds are left the node will be destroyed.</li>
 							<li>I will leave the operation available to refill for a few days.</li>
-							<li>You need to send at least {{ prices['minimum_xmr'] }} XMR to launch the node.</li>
+							<li>You need to send at least {{ prices['minimum_xmr'] | round(4) }} XMR to launch the node. Send more, because this fluctuates.</li>
 						</ol>
 						<br />
 						{% include 'includes/pricing_details.html' %}