diff --git a/crates/sp_client/src/api.rs b/crates/sp_client/src/api.rs
index 0628a60..cdce897 100644
--- a/crates/sp_client/src/api.rs
+++ b/crates/sp_client/src/api.rs
@@ -1,15 +1,49 @@
 use rand::Rng;
 
+use anyhow::Error as AnyhowError;
+use sp_backend::silentpayments::Error as SpError;
+use serde_json::Error as SerdeJsonError;
+
 use serde::{Deserialize, Serialize};
 use sp_backend::silentpayments::sending::SilentPaymentAddress;
-use wasm_bindgen::prelude::*;
 use tsify::Tsify;
+use wasm_bindgen::convert::FromWasmAbi;
+use wasm_bindgen::prelude::*;
 
 use sp_backend::spclient::SpendKey;
-use sp_backend::spclient::{derive_keys_from_seed, SpClient, OutputList};
+type ApiResult<T: FromWasmAbi> = Result<T, ApiError>;
 
 const IS_TESTNET: bool = true;
 
+#[derive(Debug)]
+struct ApiError {
+    message: String,
+}
+
+impl From<AnyhowError> for ApiError {
+    fn from(value: AnyhowError) -> Self {
+        ApiError {message: value.to_string()}
+    }
+}
+
+impl From<SpError> for ApiError {
+    fn from(value: SpError) -> Self {
+        ApiError { message: value.to_string() }
+    }
+}
+
+impl From<SerdeJsonError> for ApiError {
+    fn from(value: SerdeJsonError) -> Self {
+        ApiError { message: value.to_string() }
+    }
+}
+
+impl Into<JsValue> for ApiError {
+    fn into(self) -> JsValue {
+        JsValue::from_str(&self.message)
+    }
+}
+
 #[derive(Tsify, Serialize, Deserialize)]
 #[tsify(into_wasm_abi)]
 #[allow(non_camel_case_types)]
@@ -24,36 +58,43 @@ pub fn setup() {
 }
 
 #[wasm_bindgen]
-pub fn generate_sp_wallet(label: Option<String>, birthday: u32, is_testnet: bool) -> Option<generate_sp_wallet_return> {
+pub fn generate_sp_wallet(
+    label: Option<String>,
+    birthday: u32,
+    is_testnet: bool,
+) -> ApiResult<generate_sp_wallet_return> {
     let mut seed = [0u8; 64];
     rand::thread_rng().fill(&mut seed);
-    let (scan_sk, spend_sk) = derive_keys_from_seed(&seed, is_testnet).ok()?;
+    let (scan_sk, spend_sk) = derive_keys_from_seed(&seed, is_testnet)?;
     let sp_client = SpClient::new(
         label.unwrap_or("default".into()),
         scan_sk,
         SpendKey::Secret(spend_sk),
         None,
         IS_TESTNET,
-    )
-    .ok()?;
-    let our_address: SilentPaymentAddress = sp_client.get_receiving_address().try_into().ok()?;
+    )?;
+    let our_address: SilentPaymentAddress = sp_client.get_receiving_address().try_into()?;
     log::info!(
         "Created client for sp with address: {}",
         our_address.to_string()
     );
 
-    let sp_client_json = serde_json::to_string(&sp_client).ok()?;
-    
+    let sp_client_json = serde_json::to_string(&sp_client)?;
+
     // Generate an empty outputs
-    let sp_outputs = OutputList::new(our_address.get_scan_key(), our_address.get_spend_key(), birthday);
-    let sp_outputs_json = serde_json::to_string(&sp_outputs).ok()?;
+    let sp_outputs = OutputList::new(
+        our_address.get_scan_key(),
+        our_address.get_spend_key(),
+        birthday,
+    );
+    let sp_outputs_json = serde_json::to_string(&sp_outputs)?;
 
     let res = generate_sp_wallet_return {
         sp_client_json,
-        sp_outputs_json
+        sp_outputs_json,
     };
 
-    Some(res)
+    Ok(res)
 }
 
 #[wasm_bindgen]