_ Git - ldk-java/blob - src/main/java/org/ldk/structs/PhantomKeysManager.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  * Similar to [`KeysManager`], but allows the node using this struct to receive phantom node
  13  * payments.
  14  *
  15  * A phantom node payment is a payment made to a phantom invoice, which is an invoice that can be
  16  * paid to one of multiple nodes. This works because we encode the invoice route hints such that
  17  * LDK will recognize an incoming payment as destined for a phantom node, and collect the payment
  18  * itself without ever needing to forward to this fake node.
  19  *
  20  * Phantom node payments are useful for load balancing between multiple LDK nodes. They also
  21  * provide some fault tolerance, because payers will automatically retry paying other provided
  22  * nodes in the case that one node goes down.
  23  *
  24  * Note that multi-path payments are not supported in phantom invoices for security reasons.
  25  * Switching between this struct and [`KeysManager`] will invalidate any previously issued
  26  * invoices and attempts to pay previous invoices will fail.
  27  */
  28 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
  29 public class PhantomKeysManager extends CommonBase {
  30         PhantomKeysManager(Object _dummy, long ptr) { super(ptr); }
  31         @Override @SuppressWarnings("deprecation")
  32         protected void finalize() throws Throwable {
  33                 super.finalize();
  34                 if (ptr != 0) { bindings.PhantomKeysManager_free(ptr); }
  35         }
  36
  37         /**
  38          * Constructs a new KeysInterface which calls the relevant methods on this_arg.
  39          * This copies the `inner` pointer in this_arg and thus the returned KeysInterface must be freed before this_arg is
  40          */
  41         public KeysInterface as_KeysInterface() {
  42                 long ret = bindings.PhantomKeysManager_as_KeysInterface(this.ptr);
  43                 Reference.reachabilityFence(this);
  44                 if (ret >= 0 && ret <= 4096) { return null; }
  45                 KeysInterface ret_hu_conv = new KeysInterface(null, ret);
  46                 ret_hu_conv.ptrs_to.add(this);
  47                 return ret_hu_conv;
  48         }
  49
  50         /**
  51          * Constructs a `PhantomKeysManager` given a 32-byte seed and an additional `cross_node_seed`
  52          * that is shared across all nodes that intend to participate in [phantom node payments] together.
  53          *
  54          * See [`KeysManager::new`] for more information on `seed`, `starting_time_secs`, and
  55          * `starting_time_nanos`.
  56          *
  57          * `cross_node_seed` must be the same across all phantom payment-receiving nodes and also the
  58          * same across restarts, or else inbound payments may fail.
  59          *
  60          * [phantom node payments]: PhantomKeysManager
  61          */
  62         public static PhantomKeysManager of(byte[] seed, long starting_time_secs, int starting_time_nanos, byte[] cross_node_seed) {
  63                 long ret = bindings.PhantomKeysManager_new(InternalUtils.check_arr_len(seed, 32), starting_time_secs, starting_time_nanos, InternalUtils.check_arr_len(cross_node_seed, 32));
  64                 Reference.reachabilityFence(seed);
  65                 Reference.reachabilityFence(starting_time_secs);
  66                 Reference.reachabilityFence(starting_time_nanos);
  67                 Reference.reachabilityFence(cross_node_seed);
  68                 if (ret >= 0 && ret <= 4096) { return null; }
  69                 PhantomKeysManager ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new PhantomKeysManager(null, ret); }
  70                 ret_hu_conv.ptrs_to.add(ret_hu_conv);
  71                 return ret_hu_conv;
  72         }
  73
  74         /**
  75          * See [`KeysManager::spend_spendable_outputs`] for documentation on this method.
  76          */
  77         public Result_TransactionNoneZ spend_spendable_outputs(SpendableOutputDescriptor[] descriptors, TxOut[] outputs, byte[] change_destination_script, int feerate_sat_per_1000_weight) {
  78                 long ret = bindings.PhantomKeysManager_spend_spendable_outputs(this.ptr, descriptors != null ? Arrays.stream(descriptors).mapToLong(descriptors_conv_27 -> descriptors_conv_27.ptr).toArray() : null, outputs != null ? Arrays.stream(outputs).mapToLong(outputs_conv_7 -> outputs_conv_7.ptr).toArray() : null, change_destination_script, feerate_sat_per_1000_weight);
  79                 Reference.reachabilityFence(this);
  80                 Reference.reachabilityFence(descriptors);
  81                 Reference.reachabilityFence(outputs);
  82                 Reference.reachabilityFence(change_destination_script);
  83                 Reference.reachabilityFence(feerate_sat_per_1000_weight);
  84                 if (ret >= 0 && ret <= 4096) { return null; }
  85                 Result_TransactionNoneZ ret_hu_conv = Result_TransactionNoneZ.constr_from_ptr(ret);
  86                 return ret_hu_conv;
  87         }
  88
  89         /**
  90          * See [`KeysManager::derive_channel_keys`] for documentation on this method.
  91          */
  92         public InMemorySigner derive_channel_keys(long channel_value_satoshis, byte[] params) {
  93                 long ret = bindings.PhantomKeysManager_derive_channel_keys(this.ptr, channel_value_satoshis, InternalUtils.check_arr_len(params, 32));
  94                 Reference.reachabilityFence(this);
  95                 Reference.reachabilityFence(channel_value_satoshis);
  96                 Reference.reachabilityFence(params);
  97                 if (ret >= 0 && ret <= 4096) { return null; }
  98                 InMemorySigner ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new InMemorySigner(null, ret); }
  99                 ret_hu_conv.ptrs_to.add(this);
 100                 return ret_hu_conv;
 101         }
 102
 103 }