_ 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 java.lang.ref.Reference;
   8 import javax.annotation.Nullable;
   9
  10 /**
  11  * The `Listen` trait is used to notify when blocks have been connected or disconnected from the
  12  * chain.
  13  *
  14  * Useful when needing to replay chain data upon startup or as new chain events occur. Clients
  15  * sourcing chain data using a block-oriented API should prefer this interface over [`Confirm`].
  16  * Such clients fetch the entire header chain whereas clients using [`Confirm`] only fetch headers
  17  * when needed.
  18  *
  19  * By using [`Listen::filtered_block_connected`] this interface supports clients fetching the
  20  * entire header chain and only blocks with matching transaction data using BIP 157 filters or
  21  * other similar filtering.
  22  */
  23 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
  24 public class Listen extends CommonBase {
  25         final bindings.LDKListen bindings_instance;
  26         Listen(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }
  27         private Listen(bindings.LDKListen arg) {
  28                 super(bindings.LDKListen_new(arg));
  29                 this.ptrs_to.add(arg);
  30                 this.bindings_instance = arg;
  31         }
  32         @Override @SuppressWarnings("deprecation")
  33         protected void finalize() throws Throwable {
  34                 if (ptr != 0) { bindings.Listen_free(ptr); } super.finalize();
  35         }
  36
  37         public static interface ListenInterface {
  38                 /**
  39                  * Notifies the listener that a block was added at the given height, with the transaction data
  40                  * possibly filtered.
  41                  */
  42                 void filtered_block_connected(byte[] header, TwoTuple_usizeTransactionZ[] txdata, int height);
  43                 /**
  44                  * Notifies the listener that a block was added at the given height.
  45                  */
  46                 void block_connected(byte[] block, int height);
  47                 /**
  48                  * Notifies the listener that a block was removed at the given height.
  49                  */
  50                 void block_disconnected(byte[] header, int height);
  51         }
  52         private static class LDKListenHolder { Listen held; }
  53         public static Listen new_impl(ListenInterface arg) {
  54                 final LDKListenHolder impl_holder = new LDKListenHolder();
  55                 impl_holder.held = new Listen(new bindings.LDKListen() {
  56                         @Override public void filtered_block_connected(byte[] header, long[] txdata, int height) {
  57                                 int txdata_conv_28_len = txdata.length;
  58                                 TwoTuple_usizeTransactionZ[] txdata_conv_28_arr = new TwoTuple_usizeTransactionZ[txdata_conv_28_len];
  59                                 for (int c = 0; c < txdata_conv_28_len; c++) {
  60                                         long txdata_conv_28 = txdata[c];
  61                                         TwoTuple_usizeTransactionZ txdata_conv_28_hu_conv = new TwoTuple_usizeTransactionZ(null, txdata_conv_28);
  62                                         if (txdata_conv_28_hu_conv != null) { txdata_conv_28_hu_conv.ptrs_to.add(this); };
  63                                         txdata_conv_28_arr[c] = txdata_conv_28_hu_conv;
  64                                 }
  65                                 arg.filtered_block_connected(header, txdata_conv_28_arr, height);
  66                                 Reference.reachabilityFence(arg);
  67                         }
  68                         @Override public void block_connected(byte[] block, int height) {
  69                                 arg.block_connected(block, height);
  70                                 Reference.reachabilityFence(arg);
  71                         }
  72                         @Override public void block_disconnected(byte[] header, int height) {
  73                                 arg.block_disconnected(header, height);
  74                                 Reference.reachabilityFence(arg);
  75                         }
  76                 });
  77                 return impl_holder.held;
  78         }
  79         /**
  80          * Notifies the listener that a block was added at the given height, with the transaction data
  81          * possibly filtered.
  82          */
  83         public void filtered_block_connected(byte[] header, TwoTuple_usizeTransactionZ[] txdata, int height) {
  84                 bindings.Listen_filtered_block_connected(this.ptr, InternalUtils.check_arr_len(header, 80), txdata != null ? Arrays.stream(txdata).mapToLong(txdata_conv_28 -> txdata_conv_28 != null ? txdata_conv_28.ptr : 0).toArray() : null, height);
  85                 Reference.reachabilityFence(this);
  86                 Reference.reachabilityFence(header);
  87                 Reference.reachabilityFence(txdata);
  88                 Reference.reachabilityFence(height);
  89         }
  90
  91         /**
  92          * Notifies the listener that a block was added at the given height.
  93          */
  94         public void block_connected(byte[] block, int height) {
  95                 bindings.Listen_block_connected(this.ptr, block, height);
  96                 Reference.reachabilityFence(this);
  97                 Reference.reachabilityFence(block);
  98                 Reference.reachabilityFence(height);
  99         }
 100
 101         /**
 102          * Notifies the listener that a block was removed at the given height.
 103          */
 104         public void block_disconnected(byte[] header, int height) {
 105                 bindings.Listen_block_disconnected(this.ptr, InternalUtils.check_arr_len(header, 80), height);
 106                 Reference.reachabilityFence(this);
 107                 Reference.reachabilityFence(header);
 108                 Reference.reachabilityFence(height);
 109         }
 110
 111 }