1 package org.ldk.structs;
3 import org.ldk.impl.bindings;
4 import org.ldk.enums.*;
6 import java.util.Arrays;
9 * The `Listen` trait is used to be notified of when blocks have been connected or disconnected
12 * Useful when needing to replay chain data upon startup or as new chain events occur.
14 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
15 public class Listen extends CommonBase {
16 final bindings.LDKListen bindings_instance;
17 Listen(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }
18 private Listen(bindings.LDKListen arg) {
19 super(bindings.LDKListen_new(arg));
20 this.ptrs_to.add(arg);
21 this.bindings_instance = arg;
23 @Override @SuppressWarnings("deprecation")
24 protected void finalize() throws Throwable {
25 if (ptr != 0) { bindings.Listen_free(ptr); } super.finalize();
28 public static interface ListenInterface {
30 * Notifies the listener that a block was added at the given height.
32 void block_connected(byte[] block, int height);
34 * Notifies the listener that a block was removed at the given height.
36 void block_disconnected(byte[] header, int height);
38 private static class LDKListenHolder { Listen held; }
39 public static Listen new_impl(ListenInterface arg) {
40 final LDKListenHolder impl_holder = new LDKListenHolder();
41 impl_holder.held = new Listen(new bindings.LDKListen() {
42 @Override public void block_connected(byte[] block, int height) {
43 arg.block_connected(block, height);
45 @Override public void block_disconnected(byte[] header, int height) {
46 arg.block_disconnected(header, height);
49 return impl_holder.held;
52 * Notifies the listener that a block was added at the given height.
54 public void block_connected(byte[] block, int height) {
55 bindings.Listen_block_connected(this.ptr, block, height);
59 * Notifies the listener that a block was removed at the given height.
61 public void block_disconnected(byte[] header, int height) {
62 bindings.Listen_block_disconnected(this.ptr, header, height);