lnurl

1 files changed, 66 insertions, 0 deletions

diff --git a/routes/lnurl.js b/routes/lnurl.js
new file mode 100644
index 00000000..cb1b75c5
--- /dev/null
+++ b/routes/lnurl.js
@@ -0,0 +1,66 @@
+import { g, s } from "$lib/db";
+import { l } from "$lib/logging";
+import { fail } from "$lib/utils";
+import { v4 } from "uuid";
+import got from "got";
+import { invoice } from "$lib/invoices";
+import { bech32 } from "bech32";
+
+export default {
+  async encode({ query: { address } }, res) {
+    let [name, domain] = address.split("@");
+    let url = `https://${domain}/.well-known/lnurlp/${name}`;
+    let r = await got(url).json();
+    if (r.tag !== "payRequest") fail("not an ln address");
+    let enc = bech32.encode("lnurl", bech32.toWords(Buffer.from(url)), 20000);
+    res.send(enc);
+  },
+
+  async decode({ query: { text } }, res) {
+    let url = Buffer.from(
+      bech32.fromWords(bech32.decode(text, 20000).words)
+    ).toString();
+
+    res.send(await got(url).json());
+  },
+
+  async lnurlp({ params: { username } }, res) {
+    let uid = await g(`user:${username}`);
+    if (!uid) fail("user not found");
+
+    let id = v4();
+    await s(`lnurl:${id}`, uid);
+    let { URL } = process.env;
+    let host = URL.split("/").at(-1);
+
+    res.send({
+      metadata: [
+        ["text/plain", `Paying ${username}@${host}`],
+        ["text/identifier", `${username}@${host}`]
+      ],
+      callback: `${URL}/lnurl/${id}`,
+      tag: "payRequest"
+    });
+  },
+
+  async lnurl({ params: { id }, query: { amount } }, res) {
+    let pr = await g(`lnurlp:${id}`);
+
+    if (!pr) {
+      let uid = await g(`lnurl:${id}`);
+      let user = await g(`user:${uid}`);
+
+      ({ text: pr } = await invoice({
+        invoice: {
+          amount,
+          type: types.lightning
+        },
+        user
+      }));
+
+      await s(`lnurlp:${id}`, pr);
+    }
+
+    res.send({ pr });
+  }
+};