Update to last sp_backend api

crates/sp_client/src/api.rs

@@ -1,41 +1,63 @@
 use rand::Rng;
 
+use sp_backend::silentpayments::sending::SilentPaymentAddress;
 use wasm_bindgen::prelude::*;
 
-use sp_backend::spclient::{derive_keys_from_seed, SpClient};
 use sp_backend::spclient::SpendKey;
+use sp_backend::spclient::{derive_keys_from_seed, SpClient, OutputList};
 
 const IS_TESTNET: bool = true;
 
+#[wasm_bindgen]
+pub struct GenerateSpWalletReturn {
+    sp_client_json: String,
+    sp_outputs_json: String,
+}
+
 #[wasm_bindgen]
 pub fn setup() {
     wasm_logger::init(wasm_logger::Config::default());
 }
 
-pub fn new_key() -> Vec<u8> {
+fn new_key() -> Vec<u8> {
     let mut seed = [0u8; 64];
     rand::thread_rng().fill(&mut seed);
     seed.to_vec()
 }
 
 #[wasm_bindgen]
-pub fn generate_sp_wallet(birthday: u32, is_testnet: bool) -> Option<String> {
-    let mut seed = [0u8;64];
+pub fn generate_sp_wallet(birthday: u32, is_testnet: bool) -> Option<GenerateSpWalletReturn> {
+    let mut seed = [0u8; 64];
     seed.copy_from_slice(&new_key());
     let (scan_sk, spend_sk) = derive_keys_from_seed(&seed, is_testnet).ok()?;
-    let sp_client = SpClient::new("".to_owned(), scan_sk, SpendKey::Secret(spend_sk), None, birthday, IS_TESTNET).ok()?;
+    let sp_client = SpClient::new(
+        "".to_owned(),
+        scan_sk,
+        SpendKey::Secret(spend_sk),
+        None,
+        IS_TESTNET,
+    )
+    .ok()?;
+    let our_address: SilentPaymentAddress = sp_client.get_receiving_address().try_into().ok()?;
     log::info!(
         "Created client for sp with address: {}",
-        sp_client.get_receiving_address()
+        our_address.to_string()
     );
     // zero out the seed
     for mut b in seed.into_iter() {
         b = 0;
         assert!(b == 0); // this guarantee that the compiler won't optimize it away
     }
-    let json = serde_json::to_string(&sp_client).ok();
+    let sp_client_json = serde_json::to_string(&sp_client).ok()?;
     
-    json
+    // 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()?;
+
+    Some(GenerateSpWalletReturn {
+        sp_client_json,
+        sp_outputs_json,
+    })
 }
 
 #[wasm_bindgen]