X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Forg%2Fldk%2Fstructs%2FChainMonitor.java;h=9c83ff243ea5b77c52a8edb8ac0f6c602356133c;hb=4a36fa97d4eee96099c4a176ea845c52db27e64c;hp=1ed9337df3628264dddd94561ca1d6dba35c7872;hpb=7d6be8a5ef72a4ebfe07660cce55f43f6cc30b80;p=ldk-java

diff --git a/src/main/java/org/ldk/structs/ChainMonitor.java b/src/main/java/org/ldk/structs/ChainMonitor.java
index 1ed9337d..9c83ff24 100644
--- a/src/main/java/org/ldk/structs/ChainMonitor.java
+++ b/src/main/java/org/ldk/structs/ChainMonitor.java
@@ -4,6 +4,7 @@ import org.ldk.impl.bindings;
 import org.ldk.enums.*;
 import org.ldk.util.*;
 import java.util.Arrays;
+import java.lang.ref.Reference;
 import javax.annotation.Nullable;
 
 
@@ -15,8 +16,15 @@ import javax.annotation.Nullable;
  * or used independently to monitor channels remotely. See the [module-level documentation] for
  * details.
  * 
+ * Note that `ChainMonitor` should regularly trigger rebroadcasts/fee bumps of pending claims from
+ * a force-closed channel. This is crucial in preventing certain classes of pinning attacks,
+ * detecting substantial mempool feerate changes between blocks, and ensuring reliability if
+ * broadcasting fails. We recommend invoking this every 30 seconds, or lower if running in an
+ * environment with spotty connections, like on mobile.
+ * 
  * [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
  * [module-level documentation]: crate::chain::chainmonitor
+ * [`rebroadcast_pending_claims`]: Self::rebroadcast_pending_claims
  */
 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
 public class ChainMonitor extends CommonBase {
@@ -36,15 +44,21 @@ public class ChainMonitor extends CommonBase {
 	 * always need to fetch full blocks absent another means for determining which blocks contain
 	 * transactions relevant to the watched channels.
 	 */
-	public static ChainMonitor of(Option_FilterZ chain_source, BroadcasterInterface broadcaster, Logger logger, FeeEstimator feeest, Persist persister) {
+	public static ChainMonitor of(org.ldk.structs.Option_FilterZ chain_source, org.ldk.structs.BroadcasterInterface broadcaster, org.ldk.structs.Logger logger, org.ldk.structs.FeeEstimator feeest, org.ldk.structs.Persist persister) {
 		long ret = bindings.ChainMonitor_new(chain_source.ptr, broadcaster == null ? 0 : broadcaster.ptr, logger == null ? 0 : logger.ptr, feeest == null ? 0 : feeest.ptr, persister == null ? 0 : persister.ptr);
-		if (ret < 1024) { return null; }
-		ChainMonitor ret_hu_conv = new ChainMonitor(null, ret);
-		ret_hu_conv.ptrs_to.add(ret_hu_conv);
-		ret_hu_conv.ptrs_to.add(broadcaster);
-		ret_hu_conv.ptrs_to.add(logger);
-		ret_hu_conv.ptrs_to.add(feeest);
-		ret_hu_conv.ptrs_to.add(persister);
+		Reference.reachabilityFence(chain_source);
+		Reference.reachabilityFence(broadcaster);
+		Reference.reachabilityFence(logger);
+		Reference.reachabilityFence(feeest);
+		Reference.reachabilityFence(persister);
+		if (ret >= 0 && ret <= 4096) { return null; }
+		org.ldk.structs.ChainMonitor ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.ChainMonitor(null, ret); }
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(ret_hu_conv); };
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(chain_source); };
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(broadcaster); };
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(logger); };
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(feeest); };
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(persister); };
 		return ret_hu_conv;
 	}
 
@@ -60,27 +74,143 @@ public class ChainMonitor extends CommonBase {
 	 * inclusion in the return value.
 	 */
 	public Balance[] get_claimable_balances(ChannelDetails[] ignored_channels) {
-		long[] ret = bindings.ChainMonitor_get_claimable_balances(this.ptr, ignored_channels != null ? Arrays.stream(ignored_channels).mapToLong(ignored_channels_conv_16 -> ignored_channels_conv_16 == null ? 0 : ignored_channels_conv_16.ptr & ~1).toArray() : null);
-		Balance[] ret_conv_9_arr = new Balance[ret.length];
-		for (int j = 0; j < ret.length; j++) {
+		long[] ret = bindings.ChainMonitor_get_claimable_balances(this.ptr, ignored_channels != null ? Arrays.stream(ignored_channels).mapToLong(ignored_channels_conv_16 -> ignored_channels_conv_16 == null ? 0 : ignored_channels_conv_16.ptr).toArray() : null);
+		Reference.reachabilityFence(this);
+		Reference.reachabilityFence(ignored_channels);
+		int ret_conv_9_len = ret.length;
+		Balance[] ret_conv_9_arr = new Balance[ret_conv_9_len];
+		for (int j = 0; j < ret_conv_9_len; j++) {
 			long ret_conv_9 = ret[j];
-			Balance ret_conv_9_hu_conv = Balance.constr_from_ptr(ret_conv_9);
-			ret_conv_9_hu_conv.ptrs_to.add(this);
+			org.ldk.structs.Balance ret_conv_9_hu_conv = org.ldk.structs.Balance.constr_from_ptr(ret_conv_9);
+			if (ret_conv_9_hu_conv != null) { ret_conv_9_hu_conv.ptrs_to.add(this); };
 			ret_conv_9_arr[j] = ret_conv_9_hu_conv;
 		}
-		for (ChannelDetails ignored_channels_conv_16: ignored_channels) { this.ptrs_to.add(ignored_channels_conv_16); };
+		for (ChannelDetails ignored_channels_conv_16: ignored_channels) { if (this != null) { this.ptrs_to.add(ignored_channels_conv_16); }; };
 		return ret_conv_9_arr;
 	}
 
+	/**
+	 * Gets the [`LockedChannelMonitor`] for a given funding outpoint, returning an `Err` if no
+	 * such [`ChannelMonitor`] is currently being monitored for.
+	 * 
+	 * Note that the result holds a mutex over our monitor set, and should not be held
+	 * indefinitely.
+	 */
+	public Result_LockedChannelMonitorNoneZ get_monitor(org.ldk.structs.OutPoint funding_txo) {
+		long ret = bindings.ChainMonitor_get_monitor(this.ptr, funding_txo == null ? 0 : funding_txo.ptr);
+		Reference.reachabilityFence(this);
+		Reference.reachabilityFence(funding_txo);
+		if (ret >= 0 && ret <= 4096) { return null; }
+		Result_LockedChannelMonitorNoneZ ret_hu_conv = Result_LockedChannelMonitorNoneZ.constr_from_ptr(ret);
+		if (this != null) { this.ptrs_to.add(funding_txo); };
+		return ret_hu_conv;
+	}
+
+	/**
+	 * Lists the funding outpoint of each [`ChannelMonitor`] being monitored.
+	 * 
+	 * Note that [`ChannelMonitor`]s are not removed when a channel is closed as they are always
+	 * monitoring for on-chain state resolutions.
+	 */
+	public OutPoint[] list_monitors() {
+		long[] ret = bindings.ChainMonitor_list_monitors(this.ptr);
+		Reference.reachabilityFence(this);
+		int ret_conv_10_len = ret.length;
+		OutPoint[] ret_conv_10_arr = new OutPoint[ret_conv_10_len];
+		for (int k = 0; k < ret_conv_10_len; k++) {
+			long ret_conv_10 = ret[k];
+			org.ldk.structs.OutPoint ret_conv_10_hu_conv = null; if (ret_conv_10 < 0 || ret_conv_10 > 4096) { ret_conv_10_hu_conv = new org.ldk.structs.OutPoint(null, ret_conv_10); }
+			if (ret_conv_10_hu_conv != null) { ret_conv_10_hu_conv.ptrs_to.add(this); };
+			ret_conv_10_arr[k] = ret_conv_10_hu_conv;
+		}
+		return ret_conv_10_arr;
+	}
+
+	/**
+	 * Lists the pending updates for each [`ChannelMonitor`] (by `OutPoint` being monitored).
+	 */
+	public TwoTuple_OutPointCVec_MonitorUpdateIdZZ[] list_pending_monitor_updates() {
+		long[] ret = bindings.ChainMonitor_list_pending_monitor_updates(this.ptr);
+		Reference.reachabilityFence(this);
+		int ret_conv_41_len = ret.length;
+		TwoTuple_OutPointCVec_MonitorUpdateIdZZ[] ret_conv_41_arr = new TwoTuple_OutPointCVec_MonitorUpdateIdZZ[ret_conv_41_len];
+		for (int p = 0; p < ret_conv_41_len; p++) {
+			long ret_conv_41 = ret[p];
+			TwoTuple_OutPointCVec_MonitorUpdateIdZZ ret_conv_41_hu_conv = new TwoTuple_OutPointCVec_MonitorUpdateIdZZ(null, ret_conv_41);
+			if (ret_conv_41_hu_conv != null) { ret_conv_41_hu_conv.ptrs_to.add(this); };
+			ret_conv_41_arr[p] = ret_conv_41_hu_conv;
+		}
+		return ret_conv_41_arr;
+	}
+
+	/**
+	 * Indicates the persistence of a [`ChannelMonitor`] has completed after
+	 * [`ChannelMonitorUpdateStatus::InProgress`] was returned from an update operation.
+	 * 
+	 * Thus, the anticipated use is, at a high level:
+	 * 1) This [`ChainMonitor`] calls [`Persist::update_persisted_channel`] which stores the
+	 * update to disk and begins updating any remote (e.g. watchtower/backup) copies,
+	 * returning [`ChannelMonitorUpdateStatus::InProgress`],
+	 * 2) once all remote copies are updated, you call this function with the
+	 * `completed_update_id` that completed, and once all pending updates have completed the
+	 * channel will be re-enabled.
+	 * 
+	 * Returns an [`APIError::APIMisuseError`] if `funding_txo` does not match any currently
+	 * registered [`ChannelMonitor`]s.
+	 */
+	public Result_NoneAPIErrorZ channel_monitor_updated(org.ldk.structs.OutPoint funding_txo, org.ldk.structs.MonitorUpdateId completed_update_id) {
+		long ret = bindings.ChainMonitor_channel_monitor_updated(this.ptr, funding_txo == null ? 0 : funding_txo.ptr, completed_update_id == null ? 0 : completed_update_id.ptr);
+		Reference.reachabilityFence(this);
+		Reference.reachabilityFence(funding_txo);
+		Reference.reachabilityFence(completed_update_id);
+		if (ret >= 0 && ret <= 4096) { return null; }
+		Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
+		if (this != null) { this.ptrs_to.add(funding_txo); };
+		if (this != null) { this.ptrs_to.add(completed_update_id); };
+		return ret_hu_conv;
+	}
+
+	/**
+	 * Gets a [`Future`] that completes when an event is available either via
+	 * [`chain::Watch::release_pending_monitor_events`] or
+	 * [`EventsProvider::process_pending_events`].
+	 * 
+	 * Note that callbacks registered on the [`Future`] MUST NOT call back into this
+	 * [`ChainMonitor`] and should instead register actions to be taken later.
+	 * 
+	 * [`EventsProvider::process_pending_events`]: crate::events::EventsProvider::process_pending_events
+	 */
+	public Future get_update_future() {
+		long ret = bindings.ChainMonitor_get_update_future(this.ptr);
+		Reference.reachabilityFence(this);
+		if (ret >= 0 && ret <= 4096) { return null; }
+		org.ldk.structs.Future ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.Future(null, ret); }
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
+		return ret_hu_conv;
+	}
+
+	/**
+	 * Triggers rebroadcasts/fee-bumps of pending claims from a force-closed channel. This is
+	 * crucial in preventing certain classes of pinning attacks, detecting substantial mempool
+	 * feerate changes between blocks, and ensuring reliability if broadcasting fails. We recommend
+	 * invoking this every 30 seconds, or lower if running in an environment with spotty
+	 * connections, like on mobile.
+	 */
+	public void rebroadcast_pending_claims() {
+		bindings.ChainMonitor_rebroadcast_pending_claims(this.ptr);
+		Reference.reachabilityFence(this);
+	}
+
 	/**
 	 * Constructs a new Listen which calls the relevant methods on this_arg.
 	 * This copies the `inner` pointer in this_arg and thus the returned Listen must be freed before this_arg is
 	 */
 	public Listen as_Listen() {
 		long ret = bindings.ChainMonitor_as_Listen(this.ptr);
-		if (ret < 1024) { return null; }
+		Reference.reachabilityFence(this);
+		if (ret >= 0 && ret <= 4096) { return null; }
 		Listen ret_hu_conv = new Listen(null, ret);
-		ret_hu_conv.ptrs_to.add(this);
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
 		return ret_hu_conv;
 	}
 
@@ -90,9 +220,10 @@ public class ChainMonitor extends CommonBase {
 	 */
 	public Confirm as_Confirm() {
 		long ret = bindings.ChainMonitor_as_Confirm(this.ptr);
-		if (ret < 1024) { return null; }
+		Reference.reachabilityFence(this);
+		if (ret >= 0 && ret <= 4096) { return null; }
 		Confirm ret_hu_conv = new Confirm(null, ret);
-		ret_hu_conv.ptrs_to.add(this);
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
 		return ret_hu_conv;
 	}
 
@@ -102,9 +233,10 @@ public class ChainMonitor extends CommonBase {
 	 */
 	public Watch as_Watch() {
 		long ret = bindings.ChainMonitor_as_Watch(this.ptr);
-		if (ret < 1024) { return null; }
+		Reference.reachabilityFence(this);
+		if (ret >= 0 && ret <= 4096) { return null; }
 		Watch ret_hu_conv = new Watch(null, ret);
-		ret_hu_conv.ptrs_to.add(this);
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
 		return ret_hu_conv;
 	}
 
@@ -114,9 +246,10 @@ public class ChainMonitor extends CommonBase {
 	 */
 	public EventsProvider as_EventsProvider() {
 		long ret = bindings.ChainMonitor_as_EventsProvider(this.ptr);
-		if (ret < 1024) { return null; }
+		Reference.reachabilityFence(this);
+		if (ret >= 0 && ret <= 4096) { return null; }
 		EventsProvider ret_hu_conv = new EventsProvider(null, ret);
-		ret_hu_conv.ptrs_to.add(this);
+		if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
 		return ret_hu_conv;
 	}