diff --git a/crates/lox-wasm/src/lib.rs b/crates/lox-wasm/src/lib.rs
index f106b4e..bfd173f 100644
--- a/crates/lox-wasm/src/lib.rs
+++ b/crates/lox-wasm/src/lib.rs
@@ -509,7 +509,7 @@ pub fn handle_blockage_migration(
 }
 
 #[wasm_bindgen]
-pub fn get_last_upgrade_time(lox_cred_str: String) -> String {
+pub fn get_last_upgrade_time(lox_cred_str: String) -> Result<String, JsValue> {
     let lox_cred: lox_utils::LoxCredential = serde_json::from_str(&lox_cred_str).unwrap();
     let upgrade_date = scalar_u32(&lox_cred.lox_credential.level_since).unwrap();
     let date_time = JulianDay::new(upgrade_date as i32).to_date();
@@ -517,33 +517,42 @@ pub fn get_last_upgrade_time(lox_cred_str: String) -> String {
         "Time of last upgrade {}",
         serde_json::to_string(&date_time).unwrap()
     ));
-    serde_json::to_string(&date_time).unwrap()
+    match serde_json::to_string(&date_time) {
+        Ok(date_str) => Ok(date_str),
+        Err(e) => Err(JsValue::from(e.to_string())),
+    }
 }
 
 #[wasm_bindgen]
-pub fn get_trust_level(lox_cred_str: String) -> String {
+pub fn get_trust_level(lox_cred_str: String) -> Result<String, JsValue> {
     let lox_cred: lox_utils::LoxCredential = serde_json::from_str(&lox_cred_str).unwrap();
     let trust_level = scalar_u32(&lox_cred.lox_credential.trust_level).unwrap();
     log(&format!(
         "Trust level {}",
         serde_json::to_string(&trust_level).unwrap()
     ));
-    serde_json::to_string(&trust_level).unwrap()
+    match serde_json::to_string(&trust_level) {
+        Ok(trust_str) => Ok(trust_str),
+        Err(e) => Err(JsValue::from(e.to_string())),
+    }
 }
 
 #[wasm_bindgen]
-pub fn get_invites_remaining(lox_cred_str: String) -> String {
+pub fn get_invites_remaining(lox_cred_str: String) -> Result<String, JsValue> {
     let lox_cred: lox_utils::LoxCredential = serde_json::from_str(&lox_cred_str).unwrap();
     let invites = scalar_u32(&lox_cred.lox_credential.invites_remaining);
     log(&format!(
         "Invites remaining {}",
         serde_json::to_string(&invites).unwrap()
     ));
-    serde_json::to_string(&invites).unwrap()
+    match serde_json::to_string(&invites) {
+        Ok(invite_str) => Ok(invite_str),
+        Err(e) => Err(JsValue::from(e.to_string())),
+    }
 }
 
 #[wasm_bindgen]
-pub fn get_issued_invite_expiry(lox_cred_str: String) -> String {
+pub fn get_issued_invite_expiry(lox_cred_str: String) -> Result<String, JsValue> {
     let lox_cred: lox_utils::LoxCredential = serde_json::from_str(&lox_cred_str).unwrap();
     match lox_cred.invitation {
         Some(invitation) => {
@@ -554,14 +563,18 @@ pub fn get_issued_invite_expiry(lox_cred_str: String) -> String {
                 "Invitation Expiry {}",
                 serde_json::to_string(&date_time).unwrap()
             ));
-            serde_json::to_string(&date_time).unwrap()
+            let inv_date_str = match serde_json::to_string(&date_time) {
+                Ok(inv_date_str) => Ok(inv_date_str),
+                Err(e) => Err(JsValue::from(e.to_string())),
+            };
+            inv_date_str
         }
-        None => serde_json::to_string("No Invitation Issued").unwrap(),
+        None => Err(JsValue::from("No Invitation Issued")),
     }
 }
 
 #[wasm_bindgen]
-pub fn get_received_invite_expiry(invite_cred_str: String) -> String {
+pub fn get_received_invite_expiry(invite_cred_str: String) -> Result<String, JsValue> {
     let invite_cred: lox_utils::IssuedInvitation = serde_json::from_str(&invite_cred_str).unwrap();
     let expiry = (scalar_u32(&invite_cred.invitation.date).unwrap() + 15) as i32;
     let date_time = JulianDay::new(expiry).to_date();
@@ -570,11 +583,17 @@ pub fn get_received_invite_expiry(invite_cred_str: String) -> String {
         "Invitation Expiry {}",
         serde_json::to_string(&date_time).unwrap()
     ));
-    serde_json::to_string(&date_time).unwrap()
+    match serde_json::to_string(&date_time) {
+        Ok(date_str) => Ok(date_str),
+        Err(e) => Err(JsValue::from(e.to_string())),
+    }
 }
 
 #[wasm_bindgen]
-pub fn get_bridgelines_from_bucket(lox_cred_str: String, encrypted_table: String) -> String {
+pub fn get_bridgelines_from_bucket(
+    lox_cred_str: String,
+    encrypted_table: String,
+) -> Result<String, JsValue> {
     let lox_cred: lox_utils::LoxCredential = serde_json::from_str(&lox_cred_str).unwrap();
     let bridgelines =
         lox_utils::get_credential_bridgelines(&lox_cred.lox_credential, encrypted_table);
@@ -582,9 +601,15 @@ pub fn get_bridgelines_from_bucket(lox_cred_str: String, encrypted_table: String
         "Lox BridgeLines Expiry {}",
         serde_json::to_string(&bridgelines).unwrap()
     ));
-    serde_json::to_string(&bridgelines).unwrap()
+    match serde_json::to_string(&bridgelines) {
+        Ok(bridgelines_str) => Ok(bridgelines_str),
+        Err(e) => Err(JsValue::from(e.to_string())),
+    }
 }
 
-pub fn get_constants() -> String {
-    serde_json::to_string(&lox_utils::LOX_SYSTEM_INFO).unwrap()
+pub fn get_constants() -> Result<String, JsValue> {
+    match serde_json::to_string(&lox_utils::LOX_SYSTEM_INFO) {
+        Ok(system_info_str) => Ok(system_info_str),
+        Err(e) => Err(JsValue::from(e.to_string())),
+    }
 }