_ Git - ldk-java/blob - src/main/java/org/ldk/structs/ExpandedKey.java

   1 package org.ldk.structs;
   2
   3 import org.ldk.impl.bindings;
   4 import org.ldk.enums.*;
   5 import org.ldk.util.*;
   6 import java.util.Arrays;
   7 import java.lang.ref.Reference;
   8 import javax.annotation.Nullable;
   9
  10
  11 /**
  12  * A set of keys that were HKDF-expanded from an initial call to
  13  * [`KeysInterface::get_inbound_payment_key_material`].
  14  *
  15  * [`KeysInterface::get_inbound_payment_key_material`]: crate::chain::keysinterface::KeysInterface::get_inbound_payment_key_material
  16  */
  17 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
  18 public class ExpandedKey extends CommonBase {
  19         ExpandedKey(Object _dummy, long ptr) { super(ptr); }
  20         @Override @SuppressWarnings("deprecation")
  21         protected void finalize() throws Throwable {
  22                 super.finalize();
  23                 if (ptr != 0) { bindings.ExpandedKey_free(ptr); }
  24         }
  25
  26         /**
  27          * Create a  new [`ExpandedKey`] for generating an inbound payment hash and secret.
  28          *
  29          * It is recommended to cache this value and not regenerate it for each new inbound payment.
  30          */
  31         public static ExpandedKey of(byte[] key_material) {
  32                 long ret = bindings.ExpandedKey_new(InternalUtils.check_arr_len(key_material, 32));
  33                 Reference.reachabilityFence(key_material);
  34                 if (ret >= 0 && ret <= 4096) { return null; }
  35                 org.ldk.structs.ExpandedKey ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.ExpandedKey(null, ret); }
  36                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(ret_hu_conv); };
  37                 return ret_hu_conv;
  38         }
  39
  40 }