From a28748c33976312b9e6671636ab7e305323efb03 Mon Sep 17 00:00:00 2001
From: Vladimir Fomene <vladimirfomene@gmail.com>
Date: Fri, 25 Aug 2023 12:49:29 +0300
Subject: [PATCH] refactor: Implement Default for WalletUpdate

---
 crates/bdk/src/wallet/mod.rs                       | 11 +++++------
 example-crates/wallet_esplora_async/src/main.rs    |  2 +-
 example-crates/wallet_esplora_blocking/src/main.rs |  2 +-
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/crates/bdk/src/wallet/mod.rs b/crates/bdk/src/wallet/mod.rs
index 21ba5ee6..a7fe4d42 100644
--- a/crates/bdk/src/wallet/mod.rs
+++ b/crates/bdk/src/wallet/mod.rs
@@ -95,9 +95,9 @@ pub struct Wallet<D = ()> {
     secp: SecpCtx,
 }
 
-/// A structure to update [`KeychainTxOutIndex`], [`TxGraph`] and [`LocalChain`] atomically.
+/// A structure to update [`Wallet`].
 ///
-/// [`LocalChain`]: local_chain::LocalChain
+/// It updates [`bdk_chain::keychain::KeychainTxOutIndex`], [`bdk_chain::TxGraph`] and [`local_chain::LocalChain`] atomically.
 #[derive(Debug, Clone)]
 pub struct WalletUpdate<K, A> {
     /// Contains the last active derivation indices per keychain (`K`), which is used to update the
@@ -113,13 +113,12 @@ pub struct WalletUpdate<K, A> {
     pub chain: Option<local_chain::Update>,
 }
 
-impl<K, A> WalletUpdate<K, A> {
-    /// Construct a [`WalletUpdate`] with a given [`local_chain::Update`].
-    pub fn new(chain_update: local_chain::Update) -> Self {
+impl<K, A> Default for WalletUpdate<K, A> {
+    fn default() -> Self {
         Self {
             last_active_indices: BTreeMap::new(),
             graph: TxGraph::default(),
-            chain: Some(chain_update),
+            chain: None,
         }
     }
 }
diff --git a/example-crates/wallet_esplora_async/src/main.rs b/example-crates/wallet_esplora_async/src/main.rs
index 34c3928b..49692b5c 100644
--- a/example-crates/wallet_esplora_async/src/main.rs
+++ b/example-crates/wallet_esplora_async/src/main.rs
@@ -61,7 +61,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let update = WalletUpdate {
         last_active_indices,
         graph: update_graph,
-        ..WalletUpdate::new(chain_update)
+        chain: Some(chain_update),
     };
     wallet.apply_update(update)?;
     wallet.commit()?;
diff --git a/example-crates/wallet_esplora_blocking/src/main.rs b/example-crates/wallet_esplora_blocking/src/main.rs
index 0fb6b4bd..fb6e0e87 100644
--- a/example-crates/wallet_esplora_blocking/src/main.rs
+++ b/example-crates/wallet_esplora_blocking/src/main.rs
@@ -60,7 +60,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let update = WalletUpdate {
         last_active_indices,
         graph: update_graph,
-        ..WalletUpdate::new(chain_update)
+        chain: Some(chain_update),
     };
 
     wallet.apply_update(update)?;