lnurl channel flow

4 files changed, 77 insertions, 0 deletions

diff --git a/routes/lightning/channel.js b/routes/lightning/channel.js
new file mode 100644
index 00000000..c5ab6a02
--- /dev/null
+++ b/routes/lightning/channel.js
@@ -0,0 +1,39 @@
+const axios = require("axios");
+
+module.exports = async (req, res) => {
+  const { params } = req.body;
+  const [pubkey, host] = params.uri.split("@");
+
+  l.info("connecting to peer", req.user.username, pubkey, host);
+  let result;
+  try {
+    result = await lna.connectPeer({
+      addr: { pubkey, host },
+      perm: true
+    });
+  } catch (e) {
+    if (!e.message.includes('already connected')) {
+      l.error("problem connecting to peer", e.message);
+      return res.status(500).send(e.message);
+    }
+  }
+
+  const { callback, k1 } = params;
+  let remoteid;
+  try {
+    remoteid = (await lna.getInfo({})).identity_pubkey;
+  } catch(e) {
+    l.error("problem getting lightning node info", e.message);
+    return res.status(500).send(e.message);
+  } 
+
+  let url = `${callback}?k1=${k1}&remoteid=${remoteid}&private=0`;
+
+  try {
+    let response = await axios.get(url);
+    res.send(response.data);
+  } catch(e) {
+    l.error("problem sending channel request", e.message);
+    return res.status(500).send({ status: "ERROR", reason: e.message });
+  } 
+};
diff --git a/routes/lightning/channelRequest.js b/routes/lightning/channelRequest.js
new file mode 100644
index 00000000..9ba74009
--- /dev/null
+++ b/routes/lightning/channelRequest.js
@@ -0,0 +1,20 @@
+module.exports = async (req, res) => {
+  let { localAmt, pushAmt } = req.body;
+
+  pushAmt = 0;
+
+  try {
+    if (localAmt < 20000) throw new Error("amount must be greater than 20000 SAT");
+    if (localAmt > 1000000) throw new Error("amount must be <= 1000000");
+
+    const result = await lnurlServer.generateNewUrl("channelRequest", {
+      localAmt,
+      pushAmt
+    });
+
+    res.send(result);
+  } catch (e) {
+    l.error("problem generating channel request", e.message);
+    res.status(500).send(e.message);
+  }
+};
diff --git a/routes/lightning/decode.js b/routes/lightning/decode.js
new file mode 100644
index 00000000..b7dba120
--- /dev/null
+++ b/routes/lightning/decode.js
@@ -0,0 +1,15 @@
+const axios = require('axios');
+const lnurl = require('lnurl');
+
+module.exports = async (req, res) => {
+  let { text } = req.query;
+  const decoded = lnurl.decode(text);
+
+  try {
+    let result = await axios.get(decoded);
+    res.send(result.data);
+  } catch(e) {
+    l.error(e.message);
+    res.status(500).send(e.message);
+  } 
+};
diff --git a/routes/payments.js b/routes/payments.js
index 8f731f78..1840c381 100644
--- a/routes/payments.js
+++ b/routes/payments.js
@@ -34,6 +34,9 @@ const { join } = require("path");
       lnb = lnd(config.lnb);
     }
 
+    app.get("/lightning/decode", require("./lightning/decode"));
+    app.post("/lightning/channel", auth, require("./lightning/channel"));
+    app.post("/lightning/channelRequest", auth, require("./lightning/channelRequest"));
     app.post("/lightning/invoice", auth, require("./lightning/invoice"));
     app.post("/lightning/query", auth, require("./lightning/query"));
     app.post("/lightning/send", auth, require("./lightning/send"));