Add `PushSaplingAnchor`

src/coins.cpp

@@ -231,6 +231,15 @@ void CCoinsViewCache::PushSproutAnchor(const ZCIncrementalMerkleTree &tree) {
     );
 }
 
+void CCoinsViewCache::PushSaplingAnchor(const ZCSaplingIncrementalMerkleTree &tree) {
+    AbstractPushAnchor<ZCSaplingIncrementalMerkleTree, CAnchorsSaplingMap, CAnchorsSaplingMap::iterator, CAnchorsSaplingCacheEntry>(
+        tree,
+        SAPLING,
+        cacheSaplingAnchors,
+        hashSaplingAnchor
+    );
+}
+
 template<>
 void CCoinsViewCache::BringBestAnchorIntoCache(
     const uint256 &currentRoot,

src/coins.h

@@ -478,10 +478,14 @@ public:
                     CNullifiersMap &mapSaplingNullifiers);
 
 
-    // Adds the tree to mapAnchors and sets the current commitment
+    // Adds the tree to mapSproutAnchors and sets the current commitment
     // root to this root.
     void PushSproutAnchor(const ZCIncrementalMerkleTree &tree);
 
+    // Adds the tree to mapSaplingAnchors and sets the current commitment
+    // root to this root.
+    void PushSaplingAnchor(const ZCSaplingIncrementalMerkleTree &tree);
+
     // Removes the current commitment root from mapAnchors and sets
     // the new current root.
     void PopAnchor(const uint256 &rt, ShieldedType type);