From 572307841349ffaa20c83e5583d009c630467e66 Mon Sep 17 00:00:00 2001
From: Mark Sinclair <mmsinclair@users.noreply.github.com>
Date: Thu, 24 Nov 2022 11:14:21 +0000
Subject: [PATCH] wasm-client: add method to validate a recipient's address

---
 clients/webassembly/src/lib.rs        |  2 ++
 clients/webassembly/src/validation.rs | 35 +++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 clients/webassembly/src/validation.rs

diff --git a/clients/webassembly/src/lib.rs b/clients/webassembly/src/lib.rs
index 298410c245..3a97438249 100644
--- a/clients/webassembly/src/lib.rs
+++ b/clients/webassembly/src/lib.rs
@@ -9,6 +9,8 @@ mod client;
 pub mod encoded_payload_helper;
 #[cfg(target_arch = "wasm32")]
 pub mod gateway_selector;
+#[cfg(target_arch = "wasm32")]
+pub mod validation;
 
 #[wasm_bindgen]
 pub fn set_panic_hook() {
diff --git a/clients/webassembly/src/validation.rs b/clients/webassembly/src/validation.rs
new file mode 100644
index 0000000000..c0273f8b61
--- /dev/null
+++ b/clients/webassembly/src/validation.rs
@@ -0,0 +1,35 @@
+use nymsphinx::addressing::clients::Recipient;
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub fn validate_recipient(recipient: String) -> Result<(), JsError> {
+    match Recipient::try_from_base58_string(recipient) {
+        Ok(_) => Ok(()),
+        Err(e) => Err(JsError::new(format!("{}", e).as_str())),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::validate_recipient;
+    use wasm_bindgen_test::*;
+
+    #[wasm_bindgen_test]
+    fn test_recipient_validation_ok() {
+        let res = validate_recipient("DyQmXnst5NGGjzUZxRC5Bjs5bd7CBF3xMpsSmbRiizr2.GH6YTBP2NXU3AVqd8WjiTMVyeMjunXMEsp7gVCMEJqpD@336yuXAeGEgedRfqTJZsG2YV7P13QH1bHv1SjCZYarc9".to_string());
+        assert!(res.is_ok())
+    }
+
+    #[wasm_bindgen_test]
+    fn test_recipient_validation_fails() {
+        assert!(validate_recipient("  DyQmXnst5NGGjzUZxRC5Bjs5bd7CBF3xMpsSmbRiizr2.GH6YTBP2NXU3AVqd8WjiTMVyeMjunXMEsp7gVCMEJqpD@336yuXAeGEgedRfqTJZsG2YV7P13QH1bHv1SjCZYarc9".to_string()).is_err());
+        assert!(validate_recipient(
+            "DyQmXnst5NGGjzUZxRC5BjbRiizr2.GH6YTBP2NXU3AVqd8WD@336yuXAeGEgedRfqTJZQH1bHv1SjCZYarc9"
+                .to_string()
+        )
+        .is_err());
+        assert!(validate_recipient("🙀🙀🙀🙀".to_string()).is_err());
+        assert!(validate_recipient("".to_string()).is_err());
+        assert!(validate_recipient(" ".to_string()).is_err());
+    }
+}