refactor: Move WalletUpdate to wallet module

crates/bdk/src/wallet/mod.rs

@@ -22,7 +22,7 @@ use alloc::{
 pub use bdk_chain::keychain::Balance;
 use bdk_chain::{
     indexed_tx_graph,
-    keychain::{KeychainTxOutIndex, WalletChangeSet, WalletUpdate},
+    keychain::{KeychainTxOutIndex, WalletChangeSet},
     local_chain::{self, CannotConnectError, CheckPoint, CheckPointIter, LocalChain},
     tx_graph::{CanonicalTx, TxGraph},
     Append, BlockId, ChainPosition, ConfirmationTime, ConfirmationTimeAnchor, FullTxOut,
@@ -95,6 +95,35 @@ pub struct Wallet<D = ()> {
     secp: SecpCtx,
 }
 
+/// A structure to update [`KeychainTxOutIndex`], [`TxGraph`] and [`LocalChain`] atomically.
+///
+/// [`LocalChain`]: local_chain::LocalChain
+#[derive(Debug, Clone)]
+pub struct WalletUpdate<K, A> {
+    /// Contains the last active derivation indices per keychain (`K`), which is used to update the
+    /// [`KeychainTxOutIndex`].
+    pub last_active_indices: BTreeMap<K, u32>,
+
+    /// Update for the [`TxGraph`].
+    pub graph: TxGraph<A>,
+
+    /// Update for the [`LocalChain`].
+    ///
+    /// [`LocalChain`]: local_chain::LocalChain
+    pub chain: 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 {
+        Self {
+            last_active_indices: BTreeMap::new(),
+            graph: TxGraph::default(),
+            chain: chain_update,
+        }
+    }
+}
+
 /// The update to a [`Wallet`] used in [`Wallet::apply_update`]. This is usually returned from blockchain data sources.
 pub type Update = WalletUpdate<KeychainKind, ConfirmationTimeAnchor>;
 

crates/chain/src/keychain.rs

@@ -10,9 +10,7 @@
 //!
 //! [`SpkTxOutIndex`]: crate::SpkTxOutIndex
 
-use crate::{
-    collections::BTreeMap, indexed_tx_graph, local_chain, tx_graph::TxGraph, Anchor, Append,
-};
+use crate::{collections::BTreeMap, indexed_tx_graph, local_chain, Anchor, Append};
 
 #[cfg(feature = "miniscript")]
 mod txout_index;
@@ -82,35 +80,6 @@ impl<K> AsRef<BTreeMap<K, u32>> for ChangeSet<K> {
     }
 }
 
-/// A structure to update [`KeychainTxOutIndex`], [`TxGraph`] and [`LocalChain`] atomically.
-///
-/// [`LocalChain`]: local_chain::LocalChain
-#[derive(Debug, Clone)]
-pub struct WalletUpdate<K, A> {
-    /// Contains the last active derivation indices per keychain (`K`), which is used to update the
-    /// [`KeychainTxOutIndex`].
-    pub last_active_indices: BTreeMap<K, u32>,
-
-    /// Update for the [`TxGraph`].
-    pub graph: TxGraph<A>,
-
-    /// Update for the [`LocalChain`].
-    ///
-    /// [`LocalChain`]: local_chain::LocalChain
-    pub chain: 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 {
-        Self {
-            last_active_indices: BTreeMap::new(),
-            graph: TxGraph::default(),
-            chain: chain_update,
-        }
-    }
-}
-
 /// A structure that records the corresponding changes as result of applying an [`WalletUpdate`].
 #[derive(Debug, Clone, PartialEq)]
 #[cfg_attr(