save finalized tree with its value method

Author: sh-cha

merkle/db.go

@@ -68,7 +68,7 @@ func GetFinalizedTree(db types.BasicDB, startLeafIndex uint64) (merkletypes.Fina
 
 // SaveFinalizedTree saves the finalized tree to the db.
 func SaveFinalizedTree(db types.BasicDB, finalizedTree merkletypes.FinalizedTreeInfo) error {
-	value, err := json.Marshal(finalizedTree)
+	value, err := finalizedTree.Value()
 	if err != nil {
 		return err
 	}
@@ -115,8 +115,8 @@ func GetProofs(db types.DB, leafIndex uint64) (proofs [][]byte, treeIndex uint64
 	height := uint8(0)
 	localNodeIndex := leafIndex - treeInfo.StartLeafIndex
 	for height < treeInfo.TreeHeight {
-        // In `FinalizeWorkingTree`, we ensure that the leaf count of the tree is always a power of two by filling the leaves as needed.
-        // This ensures that there is always a sibling for each leaf node.
+		// In `FinalizeWorkingTree`, we ensure that the leaf count of the tree is always a power of two by filling the leaves as needed.
+		// This ensures that there is always a sibling for each leaf node.
 		siblingIndex := localNodeIndex ^ 1 // flip the last bit to find the sibling
 		sibling, err := GetNodeBytes(db, treeInfo.TreeIndex, height, siblingIndex)
 		if err != nil {