diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3774d51..f925401 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,5 +17,5 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: mozilla-actions/sccache-action@v0.0.3
-      - run: cargo clippy --all-features
-      - run: cargo test --all-features
+      - run: cargo clippy --all-features --all-targets
+      - run: cargo test --all-features --all-targets
diff --git a/README.md b/README.md
index 3a25a5d..4f25bfb 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This library works as a toolkit so you can serve and make your LNURL requests wi
 
 ## Current support
 
-- [LUD-01](https://github.com/lnurl/luds/blob/luds/01.md): ⚠️ core ⚠️ client ⚠️ server 🆘 tests
+- [LUD-01](https://github.com/lnurl/luds/blob/luds/01.md): ✅ core ✅ client ⚠️ server ⚠️ tests
 - [LUD-02](https://github.com/lnurl/luds/blob/luds/02.md): ⚠️ core ⚠️ client 🆘 server 🆘 tests
 - [LUD-03](https://github.com/lnurl/luds/blob/luds/03.md): ⚠️ core ⚠️ client 🆘 server 🆘 tests
 - [LUD-04](https://github.com/lnurl/luds/blob/luds/04.md): 🆘 core 🆘 client 🆘 server 🆘 tests
@@ -25,7 +25,7 @@ This library works as a toolkit so you can serve and make your LNURL requests wi
 - [LUD-14](https://github.com/lnurl/luds/blob/luds/14.md): 🆘 core 🆘 client 🆘 server 🆘 tests
 - [LUD-15](https://github.com/lnurl/luds/blob/luds/15.md): 🆘 core 🆘 client 🆘 server 🆘 tests
 - [LUD-16](https://github.com/lnurl/luds/blob/luds/16.md): ⚠️ core ⚠️ client 🆘 server 🆘 tests
-- [LUD-17](https://github.com/lnurl/luds/blob/luds/17.md): 🆘 core 🆘 client 🆘 server 🆘 tests
+- [LUD-17](https://github.com/lnurl/luds/blob/luds/17.md): ⚠️ core ⚠️ client ⚠️ server ⚠️ tests
 - [LUD-18](https://github.com/lnurl/luds/blob/luds/18.md): 🆘 core 🆘 client 🆘 server 🆘 tests
 - [LUD-19](https://github.com/lnurl/luds/blob/luds/19.md): 🆘 core 🆘 client 🆘 server 🆘 tests
 - [LUD-20](https://github.com/lnurl/luds/blob/luds/20.md): ⚠️ core ⚠️ client 🆘 server 🆘 tests
diff --git a/src/core.rs b/src/core.rs
index 71a8653..ca89c26 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -6,7 +6,7 @@ pub mod withdrawal_request;
 ///
 /// Returns error in case `s` cannot be understood.
 pub fn resolve(s: &str) -> Result<url::Url, &'static str> {
-    if s.starts_with("lnurl1") {
+    if s.starts_with("lnurl1") | s.starts_with("LNURL1") {
         resolve_bech32(s)
     } else if s.starts_with("lnurl") || s.starts_with("keyauth") {
         resolve_scheme(s)
@@ -100,3 +100,56 @@ impl std::str::FromStr for Query {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn resolve_bech32() {
+        let input = "lnurl1dp68gurn8ghj7argv4ex2tnfwvhkumelwv7hqmm0dc6p3ztw";
+        assert_eq!(
+            super::resolve(input).unwrap().to_string(),
+            "https://there.is/no?s=poon"
+        );
+
+        let input = "LNURL1DP68GURN8GHJ7ARGV4EX2TNFWVHKUMELWV7HQMM0DC6P3ZTW";
+        assert_eq!(
+            super::resolve(input).unwrap().to_string(),
+            "https://there.is/no?s=poon"
+        );
+    }
+
+    #[test]
+    fn resolve_address() {
+        assert_eq!(
+            super::resolve("no-spoon@there.is").unwrap().to_string(),
+            "https://there.is/.well-known/lnurlp/no-spoon"
+        );
+    }
+
+    #[test]
+    fn resolve_schemes() {
+        let input = "lnurlc://there.is/no?s=poon";
+        assert_eq!(
+            super::resolve(input).unwrap().to_string(),
+            "https://there.is/no?s=poon"
+        );
+
+        let input = "lnurlw://there.is/no?s=poon";
+        assert_eq!(
+            super::resolve(input).unwrap().to_string(),
+            "https://there.is/no?s=poon"
+        );
+
+        let input = "lnurlp://there.is/no?s=poon";
+        assert_eq!(
+            super::resolve(input).unwrap().to_string(),
+            "https://there.is/no?s=poon"
+        );
+
+        let input = "keyauth://there.is/no?s=poon";
+        assert_eq!(
+            super::resolve(input).unwrap().to_string(),
+            "https://there.is/no?s=poon"
+        );
+    }
+}
diff --git a/src/core/channel_request.rs b/src/core/channel_request.rs
index 82714f8..1026c05 100644
--- a/src/core/channel_request.rs
+++ b/src/core/channel_request.rs
@@ -2,7 +2,7 @@ pub const TAG: &str = "channelRequest";
 
 #[derive(Clone, Debug)]
 pub struct ChannelRequest {
-    callback: crate::serde::Url,
+    callback: url::Url,
     pub uri: String,
     k1: String,
 }
@@ -13,13 +13,13 @@ impl ChannelRequest {
     /// Returns errors on network or deserialization failures.
     #[must_use]
     pub fn callback_accept(mut self, remoteid: &str, private: bool) -> url::Url {
-        self.callback.0.query_pairs_mut().extend_pairs([
+        self.callback.query_pairs_mut().extend_pairs([
             ("k1", &self.k1 as &str),
             ("remoteid", remoteid),
             ("private", if private { "1" } else { "0" }),
         ]);
 
-        self.callback.0
+        self.callback
     }
 
     /// # Errors
@@ -27,13 +27,13 @@ impl ChannelRequest {
     /// Returns errors on network or deserialization failures.
     #[must_use]
     pub fn callback_cancel(mut self, remoteid: &str) -> url::Url {
-        self.callback.0.query_pairs_mut().extend_pairs([
+        self.callback.query_pairs_mut().extend_pairs([
             ("k1", &self.k1 as &str),
             ("remoteid", remoteid),
             ("cancel", "1"),
         ]);
 
-        self.callback.0
+        self.callback
     }
 }
 
@@ -45,7 +45,7 @@ impl std::str::FromStr for ChannelRequest {
             miniserde::json::from_str(s).map_err(|_| "deserialize failed")?;
 
         Ok(ChannelRequest {
-            callback: d.callback,
+            callback: d.callback.0,
             uri: d.uri,
             k1: d.k1,
         })
@@ -63,3 +63,68 @@ mod serde {
         pub k1: String,
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn parse() {
+        let input = r#"
+            {
+                "uri": "noh@ipe:porta",
+                "callback": "https://yuri?o=callback",
+                "k1": "caum"
+            }
+        "#;
+
+        let parsed = input.parse::<super::ChannelRequest>().expect("parse");
+
+        assert_eq!(parsed.callback.to_string(), "https://yuri/?o=callback");
+        assert_eq!(parsed.uri, "noh@ipe:porta");
+        assert_eq!(parsed.k1, "caum");
+    }
+
+    #[test]
+    fn callback_accept() {
+        let input = r#"
+            {
+                "uri": "noh@ipe:porta",
+                "callback": "https://yuri?o=callback",
+                "k1": "caum"
+            }
+        "#;
+
+        let parsed = input.parse::<super::ChannelRequest>().expect("parse");
+        let url = parsed.clone().callback_accept("idremoto", true);
+
+        assert_eq!(
+            url.to_string(),
+            "https://yuri/?o=callback&k1=caum&remoteid=idremoto&private=1"
+        );
+
+        let url = parsed.callback_accept("idremoto", false);
+
+        assert_eq!(
+            url.to_string(),
+            "https://yuri/?o=callback&k1=caum&remoteid=idremoto&private=0"
+        );
+    }
+
+    #[test]
+    fn callback_cancel() {
+        let input = r#"
+            {
+                "uri": "noh@ipe:porta",
+                "callback": "https://yuri?o=callback",
+                "k1": "caum"
+            }
+        "#;
+
+        let parsed = input.parse::<super::ChannelRequest>().expect("parse");
+        let url = parsed.callback_cancel("idremoto");
+
+        assert_eq!(
+            url.to_string(),
+            "https://yuri/?o=callback&k1=caum&remoteid=idremoto&cancel=1"
+        );
+    }
+}
diff --git a/src/core/pay_request.rs b/src/core/pay_request.rs
index d640e41..cdd8974 100644
--- a/src/core/pay_request.rs
+++ b/src/core/pay_request.rs
@@ -226,3 +226,150 @@ mod de {
         pub disposable: Option<bool>,
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn parse_base() {
+        let input = r#"
+            {
+                "callback": "https://yuri?o=callback",
+                "metadata": "[[\"text/plain\", \"boneco do steve magal\"]]",
+                "maxSendable": 315,
+                "minSendable": 314
+            }
+        "#;
+
+        let parsed = input.parse::<super::PayRequest>().expect("parse");
+
+        assert_eq!(parsed.callback.to_string(), "https://yuri/?o=callback");
+        assert_eq!(parsed.short_description, "boneco do steve magal");
+        assert_eq!(parsed.min, 314);
+        assert_eq!(parsed.max, 315);
+
+        assert_eq!(parsed.comment_size, 0);
+        assert!(parsed.long_description.is_none());
+        assert!(parsed.success_action.is_none());
+        assert!(parsed.jpeg.is_none());
+        assert!(parsed.png.is_none());
+    }
+
+    #[test]
+    fn parse_comment_size() {
+        let input = r#"
+            {
+                "callback": "https://yuri?o=callback",
+                "metadata": "[[\"text/plain\", \"boneco do steve magal\"]]",
+                "commentAllowed": 140,
+                "maxSendable": 315,
+                "minSendable": 314
+            }
+        "#;
+
+        let parsed = input.parse::<super::PayRequest>().expect("parse");
+        assert_eq!(parsed.comment_size, 140);
+    }
+
+    #[test]
+    fn parse_long_description() {
+        let input = r#"
+            {
+                "callback": "https://yuri?o=callback",
+                "metadata": "[[\"text/plain\", \"boneco do steve magal\"],[\"text/long-desc\", \"mochila a jato brutal incluida\"]]",
+                "maxSendable": 315,
+                "minSendable": 314
+            }
+        "#;
+
+        let parsed = input.parse::<super::PayRequest>().expect("parse");
+        assert_eq!(
+            parsed.long_description.unwrap(),
+            "mochila a jato brutal incluida"
+        );
+    }
+
+    #[test]
+    fn parse_images() {
+        let input = r#"
+            {
+                "callback": "https://yuri?o=callback",
+                "metadata": "[[\"text/plain\", \"boneco do steve magal\"],[\"image/png;base64\", \"Zm90b2JydXRhbA==\"],[\"image/jpeg;base64\", \"aW1hZ2VtYnJ1dGFs\"]]",
+                "maxSendable": 315,
+                "minSendable": 314
+            }
+        "#;
+
+        let parsed = input.parse::<super::PayRequest>().expect("parse");
+        assert_eq!(parsed.jpeg.unwrap(), b"imagembrutal");
+        assert_eq!(parsed.png.unwrap(), b"fotobrutal");
+    }
+
+    #[test]
+    fn parse_success_actions() {
+        let input = r#"
+            {
+                "callback": "https://yuri?o=callback",
+                "metadata": "[[\"text/plain\", \"boneco do steve magal\"]]",
+                "maxSendable": 315,
+                "minSendable": 314,
+                "successAction": {
+                    "tag": "message",
+                    "message": "obrigado!"
+                }
+            }
+        "#;
+
+        let parsed = input.parse::<super::PayRequest>().expect("parse");
+        let Some(super::SuccessAction::Message(m)) = parsed.success_action else {
+            panic!("bad success action");
+        };
+
+        assert_eq!(m, "obrigado!");
+
+        let input = r#"
+            {
+                "callback": "https://yuri?o=callback",
+                "metadata": "[[\"text/plain\", \"boneco do steve magal\"]]",
+                "maxSendable": 315,
+                "minSendable": 314,
+                "successAction": {
+                    "tag": "url",
+                    "description": "valeu demais",
+                    "url": "http://uerre.ele"
+                }
+            }
+        "#;
+
+        let parsed = input.parse::<super::PayRequest>().expect("parse");
+        let Some(super::SuccessAction::Url(u, d)) = parsed.success_action else {
+            panic!("bad success action");
+        };
+
+        assert_eq!(u.to_string(), "http://uerre.ele/");
+        assert_eq!(d, "valeu demais");
+    }
+
+    #[test]
+    fn callback() {
+        let input = r#"
+            {
+                "callback": "https://yuri?o=callback",
+                "metadata": "[[\"text/plain\", \"boneco do steve magal\"]]",
+                "maxSendable": 315,
+                "minSendable": 314
+            }
+        "#;
+
+        let parsed = input.parse::<super::PayRequest>().expect("parse");
+
+        assert_eq!(
+            parsed.clone().callback("comentario", 314).to_string(),
+            "https://yuri/?o=callback&comment=comentario&amount=314"
+        );
+
+        assert_eq!(
+            parsed.callback("", 314).to_string(),
+            "https://yuri/?o=callback&amount=314"
+        );
+    }
+}
diff --git a/src/core/withdrawal_request.rs b/src/core/withdrawal_request.rs
index 016c7f8..da1d392 100644
--- a/src/core/withdrawal_request.rs
+++ b/src/core/withdrawal_request.rs
@@ -3,7 +3,7 @@ pub const TAG: &str = "withdrawalRequest";
 #[derive(Clone, Debug)]
 pub struct WithdrawalRequest {
     k1: String,
-    callback: crate::serde::Url,
+    callback: url::Url,
     pub description: String,
     pub min: u64,
     pub max: u64,
@@ -18,7 +18,7 @@ impl std::str::FromStr for WithdrawalRequest {
 
         Ok(WithdrawalRequest {
             k1: d.k1,
-            callback: d.callback,
+            callback: d.callback.0,
             description: d.default_description,
             min: d.min_withdrawable,
             max: d.max_withdrawable,
@@ -33,11 +33,10 @@ impl WithdrawalRequest {
     #[must_use]
     pub fn callback(mut self, pr: &str) -> url::Url {
         self.callback
-            .0
             .query_pairs_mut()
             .extend_pairs([("k1", &self.k1 as &str), ("pr", pr)]);
 
-        self.callback.0
+        self.callback
     }
 }
 
@@ -57,3 +56,47 @@ mod serde {
         pub max_withdrawable: u64,
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn parse() {
+        let input = r#"
+            {
+                "k1": "caum",
+                "callback": "https://yuri?o=callback",
+                "defaultDescription": "verde com bolinhas",
+                "minWithdrawable": 314,
+                "maxWithdrawable": 315
+            }
+        "#;
+
+        let parsed = input.parse::<super::WithdrawalRequest>().expect("parse");
+
+        assert_eq!(parsed.callback.to_string(), "https://yuri/?o=callback");
+        assert_eq!(parsed.description, "verde com bolinhas");
+        assert_eq!(parsed.k1, "caum");
+        assert_eq!(parsed.max, 315);
+        assert_eq!(parsed.min, 314);
+    }
+
+    #[test]
+    fn callback() {
+        let input = r#"
+            {
+                "k1": "caum",
+                "callback": "https://yuri?o=callback",
+                "defaultDescription": "verde com bolinhas",
+                "minWithdrawable": 314,
+                "maxWithdrawable": 315
+            }
+        "#;
+
+        let parsed = input.parse::<super::WithdrawalRequest>().expect("parse");
+
+        assert_eq!(
+            parsed.callback("pierre").to_string(),
+            "https://yuri/?o=callback&k1=caum&pr=pierre"
+        );
+    }
+}