Script: migrate a native constructor that wraps chunks to of() static constructor

core/src/main/java/org/bitcoinj/script/Script.java

@@ -229,6 +229,29 @@ public class Script {
     // Creation time of the associated keys, or null if unknown.
     @Nullable private Instant creationTime;
 
+    /**
+     * Wraps given script chunks.
+     *
+     * @param chunks chunks to wrap
+     * @return script that wraps the chunks
+     */
+    public static Script of(List<ScriptChunk> chunks) {
+        return of(chunks, TimeUtils.currentTime());
+    }
+
+    /**
+     * Wraps given script chunks.
+     *
+     * @param chunks       chunks to wrap
+     * @param creationTime creation time of the script
+     * @return script that wraps the chunks
+     */
+    public static Script of(List<ScriptChunk> chunks, Instant creationTime) {
+        chunks = Collections.unmodifiableList(new ArrayList<>(chunks)); // defensive copy
+        Objects.requireNonNull(creationTime);
+        return new Script(null, chunks, creationTime);
+    }
+
     /**
      * Construct a script that copies and wraps a given program. The array is parsed and checked for syntactic
      * validity. Programs like this are e.g. used in {@link TransactionInput} and {@link TransactionOutput}.
@@ -310,12 +333,6 @@ public class Script {
         this.creationTime = creationTime;
     }
 
-    // Used from ScriptBuilder.
-    Script(List<ScriptChunk> chunks, Instant creationTime) {
-        this.chunks = Collections.unmodifiableList(new ArrayList<>(chunks));
-        this.creationTime = creationTime;
-    }
-
     /**
      * Gets the creation time of this script, or empty if unknown.
      * @return creation time of this script, or empty if unknown

core/src/main/java/org/bitcoinj/script/ScriptBuilder.java

@@ -277,7 +277,7 @@ public class ScriptBuilder {
 
     /** Creates a new immutable Script based on the state of the builder. */
     public Script build() {
-        return new Script(chunks, creationTime);
+        return Script.of(chunks, creationTime);
     }
 
     /** Creates an empty script. */