Use os.Logger commands for printing

Author: arik-so

templates/BindingsTemplate.swift

@@ -6,6 +6,7 @@
 //
 
 import Foundation
+import os
 
 public typealias LDKTransactionOutputs = LDKC2Tuple_TxidCVec_C2Tuple_u32TxOutZZZ
 public typealias TransactionOutputs = C2Tuple_TxidCVec_C2Tuple_u32TxOutZZZ
@@ -63,6 +64,7 @@ open class NativeTypeWrapper: Hashable {
 
 public class Bindings {
 
+    internal static let logger = os.Logger(subsystem: Bundle.main.bundleIdentifier!, category: "ldk")
 	internal static var minimumPrintSeverity: PrintSeverity = .WARNING
 
     public enum PrintSeverity: UInt {
@@ -73,7 +75,15 @@ public class Bindings {
 
     internal class func print(_ string: String, severity: PrintSeverity = .DEBUG) {
         if severity.rawValue >= Self.minimumPrintSeverity.rawValue {
-            Swift.print(string)
+            if severity == Self.PrintSeverity.DEBUG {
+                logger.debug("\(string)")
+            }else if severity == Self.PrintSeverity.WARNING {
+                logger.warning("\(string)")
+            }else if severity == Self.PrintSeverity.ERROR {
+                logger.error("\(string)")
+            }else {
+                logger.log("\(string)")
+            }
         }
     }