Attempt at LUD-16

README.md

@@ -24,7 +24,7 @@ This library works as a toolkit so you can serve and make your LNURL requests wi
 - [LUD-13](https://github.com/lnurl/luds/blob/luds/13.md): 🆘 implementation 🆘 example 🆘 test
 - [LUD-14](https://github.com/lnurl/luds/blob/luds/14.md): 🆘 implementation 🆘 example 🆘 test
 - [LUD-15](https://github.com/lnurl/luds/blob/luds/15.md): 🆘 implementation 🆘 example 🆘 test
-- [LUD-16](https://github.com/lnurl/luds/blob/luds/16.md): 🆘 implementation 🆘 example 🆘 test
+- [LUD-16](https://github.com/lnurl/luds/blob/luds/16.md): ✅ implementation ⚠️ example 🆘 test
 - [LUD-17](https://github.com/lnurl/luds/blob/luds/17.md): 🆘 implementation 🆘 example 🆘 test
 - [LUD-18](https://github.com/lnurl/luds/blob/luds/18.md): 🆘 implementation 🆘 example 🆘 test
 - [LUD-19](https://github.com/lnurl/luds/blob/luds/19.md): 🆘 implementation 🆘 example 🆘 test

examples/lud16.rs

@@ -0,0 +1,15 @@
+#[tokio::main(flavor = "current_thread")]
+async fn main() {
+    let client = lnurlkit::Lnurl::default();
+
+    let pr = client.address("kenu@bipa.app").await.expect("address");
+
+    println!("{pr:?}");
+
+    let invoice = pr
+        .generate_invoice("comment", 123000)
+        .await
+        .expect("callback");
+
+    println!("{invoice:?}");
+}

src/lib.rs

@@ -43,6 +43,22 @@ impl Lnurl {
 
         Ok(query)
     }
+
+    /// # Errors
+    ///
+    /// Will return error in case `address` is not a valid lnaddress,
+    /// when request or parsing fails, basically anything that goes bad.
+    pub async fn address(&self, address: &str) -> Result<pay_request::PayRequest, &'static str> {
+        let (identifier, domain) = address.split_once('@').ok_or("split failed")?;
+        let url = url::Url::parse(&format!("https://{domain}/.well-known/lnurlp/{identifier}"))
+            .map_err(|_| "bad url")?;
+
+        let response = self.0.get(url).send().await.map_err(|_| "request failed")?;
+        let body = response.text().await.map_err(|_| "body failed")?;
+        let query = pay_request::build(&body, &self.0).map_err(|_| "deserialize data failed")?;
+
+        Ok(query)
+    }
 }
 
 #[derive(Debug)]