Get unsigned raw tx

Author: hacpy

musig2/src/main/java/com/chainx/musig2bitcoin/Transaction.java

@@ -17,6 +17,8 @@ public static native String get_sighash(String base_tx,
                                             String agg_pubkey,
                                             long sigversion);
 
+    public static native String get_unsigned_tx(String base_tx);
+
     public static native String build_raw_script_tx(String base_tx,
                                                     String agg_signature,
                                                     String agg_pubkey,
@@ -76,6 +78,10 @@ public static String getSighash(String tx, String txid, long input_index, String
         return get_sighash(tx, txid, input_index, agg_pubkey, sigversion);
     }
 
+    public static String getUnsignedTx(String tx) {
+        return get_unsigned_tx(tx);
+    }
+
     public static String buildThresholdTx(String tx, String agg_signature, String agg_pubkey, String control, String txid, long input_index) {
         return build_raw_script_tx(tx, agg_signature, agg_pubkey, control, txid, input_index);
     }