wrap wallet in a mutex

Cargo.toml

@@ -38,7 +38,7 @@ multicore = ["zcash_proofs/multicore", "zcash_primitives/multicore", "zcash_clie
 # WASM specific features
 wasm = ["console_error_panic_hook", "dep:tracing-web", "zcash_client_backend/wasm-bindgen"]
 wasm-parallel = ["wasm", "wasm-bindgen-rayon", "multicore"]
-native = ["dep:tokio", "tonic/channel", "tonic/gzip", "tonic/tls-webpki-roots"]
+native = ["tonic/channel", "tonic/gzip", "tonic/tls-webpki-roots", "tokio/macros", "tokio/rt", "tokio/rt-multi-thread"]
 sqlite-db = ["dep:zcash_client_sqlite"]
 console_error_panic_hook = ["dep:console_error_panic_hook"]
 no-bundler = ["wasm-bindgen-rayon?/no-bundler"]
@@ -78,7 +78,7 @@ tonic = { version = "0.12", default-features = false, features = [
 
 
 # Used in Native tests
-tokio = { version = "1.0", features = ["rt", "macros", "rt-multi-thread"], optional = true }
+tokio = { version = "1.0" }
 zcash_client_sqlite = { git = "https://github.com/ChainSafe/librustzcash", rev = "0fdd2fbb992a6f84eba45f488ee74a75d08d449b", default-features = false, features = ["unstable", "orchard"], optional = true }
 
 getrandom = { version = "0.2", features = ["js"] }
@@ -99,12 +99,16 @@ wasm_thread = { git = "https://github.com/WilsonGramer/wasm_thread.git", rev = "
 
 wasm_sync = "0.1.2"
 http = { version = "1.1.0", default-features = false }
+serde = { version = "1", features = ["derive"], default-features = false }
+
+postcard = { version = "1.0.10", features = ["alloc"] }
 
 [dev-dependencies]
 wasm-bindgen-test = "0.3.43"
 tempfile = "3.12"
 # Used in Native tests
 tokio = { version = "1.0", features = ["rt", "macros"] }
+byte-unit = { version = "5.1.4", features = ["byte"] }
 
 
 [patch.crates-io]

examples/message-board-sync.rs

@@ -60,7 +60,7 @@ async fn main() {
     .unwrap();
 
     let ufvk = UnifiedFullViewingKey::from_sapling_extended_full_viewing_key(s).unwrap();
-    let id = w.import_ufvk(&ufvk, Some(2477329)).await.unwrap();
+    let id = w.import_ufvk(&ufvk, Some(2277329)).await.unwrap();
     tracing::info!("Created account with id: {}", id);
 
     #[cfg(not(feature = "sync2"))]
@@ -80,6 +80,20 @@ async fn main() {
 
     tracing::info!("Syncing complete :)");
 
-    let summary = w.get_wallet_summary().unwrap();
+    let summary = w.get_wallet_summary().await.unwrap();
     tracing::info!("Wallet summary: {:?}", summary);
+
+    #[cfg(not(feature = "sqlite-db"))]
+    {
+        tracing::info!("Serializing wallet");
+        let serialized_wallet = w.to_vec_postcard().await;
+        let byte_count = byte_unit::Byte::from_u64(serialized_wallet.len() as u64);
+
+        tracing::info!(
+            "Wallet serialized: {}",
+            byte_count
+                .get_adjusted_unit(byte_unit::Unit::MB)
+                .to_string()
+        )
+    }
 }

examples/simple-sync.rs

@@ -84,7 +84,7 @@ async fn main() {
 
     tracing::info!("Syncing complete :)");
 
-    let summary = w.get_wallet_summary().unwrap();
+    let summary = w.get_wallet_summary().await.unwrap();
     tracing::info!("Wallet summary: {:?}", summary);
 
     tracing::info!("Proposing a transaction");
@@ -93,6 +93,20 @@ async fn main() {
     w.transfer(SEED, 0, addr.unwrap(), 1000).await.unwrap();
     tracing::info!("Transaction proposed");
 
-    let summary = w.get_wallet_summary().unwrap();
+    let summary = w.get_wallet_summary().await.unwrap();
     tracing::info!("Wallet summary: {:?}", summary);
+
+    #[cfg(not(feature = "sqlite-db"))]
+    {
+        tracing::info!("Serializing wallet");
+        let serialized_wallet = w.to_vec_postcard().await;
+        let byte_count = byte_unit::Byte::from_u64(serialized_wallet.len() as u64);
+
+        tracing::info!(
+            "Wallet serialized: {}",
+            byte_count
+                .get_adjusted_unit(byte_unit::Unit::MB)
+                .to_string()
+        )
+    }
 }

src/bindgen/wallet.rs

@@ -47,8 +47,8 @@ impl WebWallet {
         }
     }
 
-    pub fn client(&mut self) -> &mut CompactTxStreamerClient<tonic_web_wasm_client::Client> {
-        self.inner.client()
+    pub fn client(&self) -> CompactTxStreamerClient<tonic_web_wasm_client::Client> {
+        self.inner.client.clone()
     }
 
     pub fn inner_mut(&mut self) -> &mut MemoryWallet<tonic_web_wasm_client::Client> {
@@ -109,8 +109,8 @@ impl WebWallet {
         self.inner.import_ufvk(&ufvk, birthday_height).await
     }
 
-    pub fn suggest_scan_ranges(&self) -> Result<Vec<BlockRange>, Error> {
-        self.inner.suggest_scan_ranges()
+    pub async fn suggest_scan_ranges(&self) -> Result<Vec<BlockRange>, Error> {
+        self.inner.suggest_scan_ranges().await
     }
 
     /// Synchronize the wallet with the blockchain up to the tip
@@ -135,8 +135,8 @@ impl WebWallet {
         self.inner.sync2().await
     }
 
-    pub fn get_wallet_summary(&self) -> Result<Option<WalletSummary>, Error> {
-        Ok(self.inner.get_wallet_summary()?.map(Into::into))
+    pub async fn get_wallet_summary(&self) -> Result<Option<WalletSummary>, Error> {
+        Ok(self.inner.get_wallet_summary().await?.map(Into::into))
     }
 
     ///