From a742dbf327e08715e7042099fed7d71dce62eea3 Mon Sep 17 00:00:00 2001
From: Adam Soltys <asoltys@gmail.com>
Date: Sun, 12 Jul 2020 08:33:54 -0700
Subject: handle zero amount pay request

---
 routes/lnurl.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/routes/lnurl.js b/routes/lnurl.js
index 743936bc..74e5cc0a 100644
--- a/routes/lnurl.js
+++ b/routes/lnurl.js
@@ -68,11 +68,15 @@ app.get("/pay", auth, async (req, res) => {
   const { user } = req;
   const { amount } = req.query;
 
+  let minSendable = 1000;
+  let maxSendable = 1000000000;
+  if (parseInt(amount)) minSendable = maxSendable = amount * 1000;
+
   try {
     const result = await lnurlServer.generateNewUrl("payRequest", {
-      minSendable: amount * 1000,
-      maxSendable: amount * 1000,
-      metadata: JSON.stringify([["text/plain", "coinos"]]),
+      minSendable,
+      maxSendable,
+      metadata: JSON.stringify([["text/plain", `fund coinos account ${user.username}`]]),
     });
 
     recipients[result.secret] = req.user;
@@ -177,7 +181,7 @@ lnurlServer.bindToHook(
         where: {
           user_id: user.id,
           asset: config.liquid.btcasset,
-        }
+        },
       });
 
       if (account.balance < amount) {
-- 
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