Allow to set upper amount limit for Ligtning Network invoices

config.py

@@ -114,6 +114,7 @@ def check_set_node_conf(name, default, node_conf):
 tunnel_port = get_opt("tunnel_port", 22)
 tor_proxy = get_opt("tor_proxy", None)
 onchain_dust_limit = get_opt("onchain_dust_limit", 0.00000546)
+ln_upper_limit = get_opt("ln_upper_limit", 0.10000000)
 node_info = get_opt("node_info", None)
 pollrate = get_opt("pollrate", 15)
 payment_timeout = get_opt("payment_timeout", 60 * 60)

config.toml

@@ -79,6 +79,10 @@ api_key_path = "SatSale_API_key"
 # below this value.
 onchain_dust_limit = 0.00000546
 
+# Upper limit for LN payments in BTC. Don't generate Lightning invoices above
+# this value.
+ln_upper_limit = 0.10000000
+
 # You can display your node uri so users can open channels with you by setting
 # node_info="uri" (manually) or true (use `admin.macaroon` to fetch `getinfo`)
 #node_info = "uri"

satsale.py

@@ -155,9 +155,9 @@ def get(self):
 
         btc_value = get_btc_value(base_amount, currency)
 
-        if btc_value > 21000000:
+        if btc_value > 21000000 or (not node.is_onchain and btc_value > config.ln_upper_limit):
             logging.warning(
-                "Requested payment for {} {} BTC value {} too large (above 21M cap)".format(
+                "Requested payment for {} {} BTC value {} too large".format(
                     base_amount,
                     currency,
                     btc_value
@@ -189,6 +189,7 @@ def get(self):
             "time": time.time(),
             "webhook": webhook,
             "onchain_dust_limit": config.onchain_dust_limit,
+            "ln_upper_limit": config.ln_upper_limit,
         }
 
         # Get an address / invoice, and create a QR code

static/satsale.js

@@ -19,7 +19,7 @@ function payment(payment_data) {
             $('#timer').text(Math.round(invoice.time_left)).html();
             $('#paymentDetails').show();
 
-            if (invoice.btc_value >= invoice.onchain_dust_limit) {
+            if (invoice.btc_value >= invoice.onchain_dust_limit && invoice.btc_value <= invoice.ln_upper_limit) {
                 $('#paymentMethodSwitchButton').show();
             }