import org.ldk.enums.*;
import org.ldk.util.*;
import java.util.Arrays;
+import java.lang.ref.Reference;
+import javax.annotation.Nullable;
+
+/**
+ * An implementation of [`chain::Watch`] for monitoring channels.
+ *
+ * Connected and disconnected blocks must be provided to `ChainMonitor` as documented by
+ * [`chain::Watch`]. May be used in conjunction with [`ChannelManager`] to monitor channels locally
+ * 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 {
ChainMonitor(Object _dummy, long ptr) { super(ptr); }
if (ptr != 0) { bindings.ChainMonitor_free(ptr); }
}
- public void block_connected(byte[] header, TwoTuple<Long, Transaction>[] txdata, int height) {
- bindings.ChainMonitor_block_connected(this.ptr, header, Arrays.stream(txdata).mapToLong(arr_conv_29 -> bindings.C2Tuple_usizeTransactionZ_new(arr_conv_29.a, arr_conv_29.b.ptr)).toArray(), height);
- /* TODO 2 TwoTuple<Long, Transaction> */;
+ /**
+ * Creates a new `ChainMonitor` used to watch on-chain activity pertaining to channels.
+ *
+ * When an optional chain source implementing [`chain::Filter`] is provided, the chain monitor
+ * will call back to it indicating transactions and outputs of interest. This allows clients to
+ * pre-filter blocks or only fetch blocks matching a compact filter. Otherwise, clients may
+ * always need to fetch full blocks absent another means for determining which blocks contain
+ * transactions relevant to the watched channels.
+ */
+ 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.ptr, logger.ptr, feeest.ptr, persister.ptr);
+ 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;
+ }
+
+ /**
+ * Gets the balances in the contained [`ChannelMonitor`]s which are claimable on-chain or
+ * claims which are awaiting confirmation.
+ *
+ * Includes the balances from each [`ChannelMonitor`] *except* those included in
+ * `ignored_channels`, allowing you to filter out balances from channels which are still open
+ * (and whose balance should likely be pulled from the [`ChannelDetails`]).
+ *
+ * See [`ChannelMonitor::get_claimable_balances`] for more details on the exact criteria for
+ * 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.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];
+ 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) { 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.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 and channel ID 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 TwoTuple_OutPointChannelIdZ[] list_monitors() {
+ long[] ret = bindings.ChainMonitor_list_monitors(this.ptr);
+ Reference.reachabilityFence(this);
+ int ret_conv_29_len = ret.length;
+ TwoTuple_OutPointChannelIdZ[] ret_conv_29_arr = new TwoTuple_OutPointChannelIdZ[ret_conv_29_len];
+ for (int d = 0; d < ret_conv_29_len; d++) {
+ long ret_conv_29 = ret[d];
+ TwoTuple_OutPointChannelIdZ ret_conv_29_hu_conv = new TwoTuple_OutPointChannelIdZ(null, ret_conv_29);
+ if (ret_conv_29_hu_conv != null) { ret_conv_29_hu_conv.ptrs_to.add(this); };
+ ret_conv_29_arr[d] = ret_conv_29_hu_conv;
+ }
+ return ret_conv_29_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.ptr, 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);
+ }
+
+ /**
+ * Triggers rebroadcasts of pending claims from force-closed channels after a transaction
+ * signature generation failure.
+ *
+ * `monitor_opt` can be used as a filter to only trigger them for a specific channel monitor.
+ *
+ * Note that monitor_opt (or a relevant inner pointer) may be NULL or all-0s to represent None
+ */
+ public void signer_unblocked(@Nullable org.ldk.structs.OutPoint monitor_opt) {
+ bindings.ChainMonitor_signer_unblocked(this.ptr, monitor_opt == null ? 0 : monitor_opt.ptr);
+ Reference.reachabilityFence(this);
+ Reference.reachabilityFence(monitor_opt);
+ if (this != null) { this.ptrs_to.add(monitor_opt); };
}
- public void block_disconnected(byte[] header, int disconnected_height) {
- bindings.ChainMonitor_block_disconnected(this.ptr, header, disconnected_height);
+ /**
+ * Archives fully resolved channel monitors by calling [`Persist::archive_persisted_channel`].
+ *
+ * This is useful for pruning fully resolved monitors from the monitor set and primary
+ * storage so they are not kept in memory and reloaded on restart.
+ *
+ * Should be called occasionally (once every handful of blocks or on startup).
+ *
+ * Depending on the implementation of [`Persist::archive_persisted_channel`] the monitor
+ * data could be moved to an archive location or removed entirely.
+ */
+ public void archive_fully_resolved_channel_monitors() {
+ bindings.ChainMonitor_archive_fully_resolved_channel_monitors(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);
+ Reference.reachabilityFence(this);
+ if (ret >= 0 && ret <= 4096) { return null; }
+ Listen ret_hu_conv = new Listen(null, ret);
+ if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
+ return ret_hu_conv;
}
- public static ChainMonitor constructor_new(Filter chain_source, BroadcasterInterface broadcaster, Logger logger, FeeEstimator feeest) {
- long ret = bindings.ChainMonitor_new(chain_source == null ? 0 : chain_source.ptr, broadcaster == null ? 0 : broadcaster.ptr, logger == null ? 0 : logger.ptr, feeest == null ? 0 : feeest.ptr);
- ChainMonitor ret_hu_conv = new ChainMonitor(null, ret);
- ret_hu_conv.ptrs_to.add(chain_source);
- ret_hu_conv.ptrs_to.add(broadcaster);
- ret_hu_conv.ptrs_to.add(logger);
- ret_hu_conv.ptrs_to.add(feeest);
+ /**
+ * Constructs a new Confirm which calls the relevant methods on this_arg.
+ * This copies the `inner` pointer in this_arg and thus the returned Confirm must be freed before this_arg is
+ */
+ public Confirm as_Confirm() {
+ long ret = bindings.ChainMonitor_as_Confirm(this.ptr);
+ Reference.reachabilityFence(this);
+ if (ret >= 0 && ret <= 4096) { return null; }
+ Confirm ret_hu_conv = new Confirm(null, ret);
+ if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
return ret_hu_conv;
}
+ /**
+ * Constructs a new Watch which calls the relevant methods on this_arg.
+ * This copies the `inner` pointer in this_arg and thus the returned Watch must be freed before this_arg is
+ */
public Watch as_Watch() {
long ret = bindings.ChainMonitor_as_Watch(this.ptr);
+ 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;
}
+ /**
+ * Constructs a new EventsProvider which calls the relevant methods on this_arg.
+ * This copies the `inner` pointer in this_arg and thus the returned EventsProvider must be freed before this_arg is
+ */
public EventsProvider as_EventsProvider() {
long ret = bindings.ChainMonitor_as_EventsProvider(this.ptr);
+ 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;
}