_ Git - ldk-java/blob - src/main/java/org/ldk/structs/Listen.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 javax.annotation.Nullable;
   8
   9 /**
  10  * The `Listen` trait is used to notify when blocks have been connected or disconnected from the
  11  * chain.
  12  *
  13  * Useful when needing to replay chain data upon startup or as new chain events occur. Clients
  14  * sourcing chain data using a block-oriented API should prefer this interface over [`Confirm`].
  15  * Such clients fetch the entire header chain whereas clients using [`Confirm`] only fetch headers
  16  * when needed.
  17  */
  18 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
  19 public class Listen extends CommonBase {
  20         final bindings.LDKListen bindings_instance;
  21         Listen(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }
  22         private Listen(bindings.LDKListen arg) {
  23                 super(bindings.LDKListen_new(arg));
  24                 this.ptrs_to.add(arg);
  25                 this.bindings_instance = arg;
  26         }
  27         @Override @SuppressWarnings("deprecation")
  28         protected void finalize() throws Throwable {
  29                 if (ptr != 0) { bindings.Listen_free(ptr); } super.finalize();
  30         }
  31
  32         public static interface ListenInterface {
  33                 /**
  34                  * Notifies the listener that a block was added at the given height.
  35                  */
  36                 void block_connected(byte[] block, int height);
  37                 /**
  38                  * Notifies the listener that a block was removed at the given height.
  39                  */
  40                 void block_disconnected(byte[] header, int height);
  41         }
  42         private static class LDKListenHolder { Listen held; }
  43         public static Listen new_impl(ListenInterface arg) {
  44                 final LDKListenHolder impl_holder = new LDKListenHolder();
  45                 impl_holder.held = new Listen(new bindings.LDKListen() {
  46                         @Override public void block_connected(byte[] block, int height) {
  47                                 arg.block_connected(block, height);
  48                         }
  49                         @Override public void block_disconnected(byte[] header, int height) {
  50                                 arg.block_disconnected(header, height);
  51                         }
  52                 });
  53                 return impl_holder.held;
  54         }
  55         /**
  56          * Notifies the listener that a block was added at the given height.
  57          */
  58         public void block_connected(byte[] block, int height) {
  59                 bindings.Listen_block_connected(this.ptr, block, height);
  60         }
  61
  62         /**
  63          * Notifies the listener that a block was removed at the given height.
  64          */
  65         public void block_disconnected(byte[] header, int height) {
  66                 bindings.Listen_block_disconnected(this.ptr, InternalUtils.check_arr_len(header, 80), height);
  67         }
  68
  69 }