1 package org.ldk.structs;
3 import org.ldk.impl.bindings;
4 import org.ldk.enums.*;
6 import java.util.Arrays;
7 import java.lang.ref.Reference;
8 import javax.annotation.Nullable;
12 * Manager which keeps track of a number of channels and sends messages to the appropriate
13 * channel, also tracking HTLC preimages and forwarding onion packets appropriately.
15 * Implements ChannelMessageHandler, handling the multi-channel parts and passing things through
16 * to individual Channels.
18 * Implements Writeable to write out all channel state to disk. Implies peer_disconnected() for
19 * all peers during write/read (though does not modify this instance, only the instance being
20 * serialized). This will result in any channels which have not yet exchanged funding_created (ie
21 * called funding_transaction_generated for outbound channels).
23 * Note that you can be a bit lazier about writing out ChannelManager than you can be with
24 * ChannelMonitors. With ChannelMonitors you MUST write each monitor update out to disk before
25 * returning from chain::Watch::watch_/update_channel, with ChannelManagers, writing updates
26 * happens out-of-band (and will prevent any other ChannelManager operations from occurring during
27 * the serialization process). If the deserialized version is out-of-date compared to the
28 * ChannelMonitors passed by reference to read(), those channels will be force-closed based on the
29 * ChannelMonitor state and no funds will be lost (mod on-chain transaction fees).
31 * Note that the deserializer is only implemented for (BlockHash, ChannelManager), which
32 * tells you the last block hash which was block_connect()ed. You MUST rescan any blocks along
33 * the \"reorg path\" (ie call block_disconnected() until you get to a common block and then call
34 * block_connected() to step towards your best block) upon deserialization before using the
37 * Note that ChannelManager is responsible for tracking liveness of its channels and generating
38 * ChannelUpdate messages informing peers that the channel is temporarily disabled. To avoid
39 * spam due to quick disconnection/reconnection, updates are not sent until the channel has been
40 * offline for a full minute. In order to track this, you must call
41 * timer_tick_occurred roughly once per minute, though it doesn't have to be perfect.
43 * Rather than using a plain ChannelManager, it is preferable to use either a SimpleArcChannelManager
44 * a SimpleRefChannelManager, for conciseness. See their documentation for more details, but
45 * essentially you should default to using a SimpleRefChannelManager, and use a
46 * SimpleArcChannelManager when you require a ChannelManager with a static lifetime, such as when
47 * you're using lightning-net-tokio.
49 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
50 public class ChannelManager extends CommonBase {
51 ChannelManager(Object _dummy, long ptr) { super(ptr); }
52 @Override @SuppressWarnings("deprecation")
53 protected void finalize() throws Throwable {
55 if (ptr != 0) { bindings.ChannelManager_free(ptr); }
59 * Constructs a new ChannelManager to hold several channels and route between them.
61 * This is the main \"logic hub\" for all channel-related actions, and implements
62 * ChannelMessageHandler.
64 * Non-proportional fees are fixed according to our risk using the provided fee estimator.
66 * Users need to notify the new ChannelManager when a new block is connected or
67 * disconnected using its `block_connected` and `block_disconnected` methods, starting
68 * from after `params.latest_hash`.
70 public static ChannelManager of(FeeEstimator fee_est, Watch chain_monitor, BroadcasterInterface tx_broadcaster, Logger logger, KeysInterface keys_manager, UserConfig config, ChainParameters params) {
71 long ret = bindings.ChannelManager_new(fee_est == null ? 0 : fee_est.ptr, chain_monitor == null ? 0 : chain_monitor.ptr, tx_broadcaster == null ? 0 : tx_broadcaster.ptr, logger == null ? 0 : logger.ptr, keys_manager == null ? 0 : keys_manager.ptr, config == null ? 0 : config.ptr, params == null ? 0 : params.ptr);
72 Reference.reachabilityFence(fee_est);
73 Reference.reachabilityFence(chain_monitor);
74 Reference.reachabilityFence(tx_broadcaster);
75 Reference.reachabilityFence(logger);
76 Reference.reachabilityFence(keys_manager);
77 Reference.reachabilityFence(config);
78 Reference.reachabilityFence(params);
79 if (ret >= 0 && ret <= 4096) { return null; }
80 org.ldk.structs.ChannelManager ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.ChannelManager(null, ret); }
81 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(ret_hu_conv); };
82 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(fee_est); };
83 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(chain_monitor); };
84 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(tx_broadcaster); };
85 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(logger); };
86 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(keys_manager); };
87 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(config); };
88 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(params); };
93 * Gets the current configuration applied to all new channels.
95 public UserConfig get_current_default_configuration() {
96 long ret = bindings.ChannelManager_get_current_default_configuration(this.ptr);
97 Reference.reachabilityFence(this);
98 if (ret >= 0 && ret <= 4096) { return null; }
99 org.ldk.structs.UserConfig ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.UserConfig(null, ret); }
100 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
105 * Creates a new outbound channel to the given remote node and with the given value.
107 * `user_channel_id` will be provided back as in
108 * [`Event::FundingGenerationReady::user_channel_id`] to allow tracking of which events
109 * correspond with which `create_channel` call. Note that the `user_channel_id` defaults to 0
110 * for inbound channels, so you may wish to avoid using 0 for `user_channel_id` here.
111 * `user_channel_id` has no meaning inside of LDK, it is simply copied to events and otherwise
114 * Raises [`APIError::APIMisuseError`] when `channel_value_satoshis` > 2**24 or `push_msat` is
115 * greater than `channel_value_satoshis * 1k` or `channel_value_satoshis < 1000`.
117 * Note that we do not check if you are currently connected to the given peer. If no
118 * connection is available, the outbound `open_channel` message may fail to send, resulting in
119 * the channel eventually being silently forgotten (dropped on reload).
121 * Returns the new Channel's temporary `channel_id`. This ID will appear as
122 * [`Event::FundingGenerationReady::temporary_channel_id`] and in
123 * [`ChannelDetails::channel_id`] until after
124 * [`ChannelManager::funding_transaction_generated`] is called, swapping the Channel's ID for
125 * one derived from the funding transaction's TXID. If the counterparty rejects the channel
126 * immediately, this temporary ID will appear in [`Event::ChannelClosed::channel_id`].
128 * [`Event::FundingGenerationReady::user_channel_id`]: events::Event::FundingGenerationReady::user_channel_id
129 * [`Event::FundingGenerationReady::temporary_channel_id`]: events::Event::FundingGenerationReady::temporary_channel_id
130 * [`Event::ChannelClosed::channel_id`]: events::Event::ChannelClosed::channel_id
132 * Note that override_config (or a relevant inner pointer) may be NULL or all-0s to represent None
134 public Result__u832APIErrorZ create_channel(byte[] their_network_key, long channel_value_satoshis, long push_msat, long user_channel_id, @Nullable UserConfig override_config) {
135 long ret = bindings.ChannelManager_create_channel(this.ptr, InternalUtils.check_arr_len(their_network_key, 33), channel_value_satoshis, push_msat, user_channel_id, override_config == null ? 0 : override_config.ptr);
136 Reference.reachabilityFence(this);
137 Reference.reachabilityFence(their_network_key);
138 Reference.reachabilityFence(channel_value_satoshis);
139 Reference.reachabilityFence(push_msat);
140 Reference.reachabilityFence(user_channel_id);
141 Reference.reachabilityFence(override_config);
142 if (ret >= 0 && ret <= 4096) { return null; }
143 Result__u832APIErrorZ ret_hu_conv = Result__u832APIErrorZ.constr_from_ptr(ret);
144 if (this != null) { this.ptrs_to.add(override_config); };
149 * Gets the list of open channels, in random order. See ChannelDetail field documentation for
152 public ChannelDetails[] list_channels() {
153 long[] ret = bindings.ChannelManager_list_channels(this.ptr);
154 Reference.reachabilityFence(this);
155 int ret_conv_16_len = ret.length;
156 ChannelDetails[] ret_conv_16_arr = new ChannelDetails[ret_conv_16_len];
157 for (int q = 0; q < ret_conv_16_len; q++) {
158 long ret_conv_16 = ret[q];
159 org.ldk.structs.ChannelDetails ret_conv_16_hu_conv = null; if (ret_conv_16 < 0 || ret_conv_16 > 4096) { ret_conv_16_hu_conv = new org.ldk.structs.ChannelDetails(null, ret_conv_16); }
160 if (ret_conv_16_hu_conv != null) { ret_conv_16_hu_conv.ptrs_to.add(this); };
161 ret_conv_16_arr[q] = ret_conv_16_hu_conv;
163 return ret_conv_16_arr;
167 * Gets the list of usable channels, in random order. Useful as an argument to [`find_route`]
168 * to ensure non-announced channels are used.
170 * These are guaranteed to have their [`ChannelDetails::is_usable`] value set to true, see the
171 * documentation for [`ChannelDetails::is_usable`] for more info on exactly what the criteria
174 * [`find_route`]: crate::routing::router::find_route
176 public ChannelDetails[] list_usable_channels() {
177 long[] ret = bindings.ChannelManager_list_usable_channels(this.ptr);
178 Reference.reachabilityFence(this);
179 int ret_conv_16_len = ret.length;
180 ChannelDetails[] ret_conv_16_arr = new ChannelDetails[ret_conv_16_len];
181 for (int q = 0; q < ret_conv_16_len; q++) {
182 long ret_conv_16 = ret[q];
183 org.ldk.structs.ChannelDetails ret_conv_16_hu_conv = null; if (ret_conv_16 < 0 || ret_conv_16 > 4096) { ret_conv_16_hu_conv = new org.ldk.structs.ChannelDetails(null, ret_conv_16); }
184 if (ret_conv_16_hu_conv != null) { ret_conv_16_hu_conv.ptrs_to.add(this); };
185 ret_conv_16_arr[q] = ret_conv_16_hu_conv;
187 return ret_conv_16_arr;
191 * Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
192 * will be accepted on the given channel, and after additional timeout/the closing of all
193 * pending HTLCs, the channel will be closed on chain.
195 * If we are the channel initiator, we will pay between our [`Background`] and
196 * [`ChannelConfig::force_close_avoidance_max_fee_satoshis`] plus our [`Normal`] fee
198 * If our counterparty is the channel initiator, we will require a channel closing
199 * transaction feerate of at least our [`Background`] feerate or the feerate which
200 * would appear on a force-closure transaction, whichever is lower. We will allow our
201 * counterparty to pay as much fee as they'd like, however.
203 * May generate a SendShutdown message event on success, which should be relayed.
205 * [`ChannelConfig::force_close_avoidance_max_fee_satoshis`]: crate::util::config::ChannelConfig::force_close_avoidance_max_fee_satoshis
206 * [`Background`]: crate::chain::chaininterface::ConfirmationTarget::Background
207 * [`Normal`]: crate::chain::chaininterface::ConfirmationTarget::Normal
209 public Result_NoneAPIErrorZ close_channel(byte[] channel_id, byte[] counterparty_node_id) {
210 long ret = bindings.ChannelManager_close_channel(this.ptr, InternalUtils.check_arr_len(channel_id, 32), InternalUtils.check_arr_len(counterparty_node_id, 33));
211 Reference.reachabilityFence(this);
212 Reference.reachabilityFence(channel_id);
213 Reference.reachabilityFence(counterparty_node_id);
214 if (ret >= 0 && ret <= 4096) { return null; }
215 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
220 * Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
221 * will be accepted on the given channel, and after additional timeout/the closing of all
222 * pending HTLCs, the channel will be closed on chain.
224 * `target_feerate_sat_per_1000_weight` has different meanings depending on if we initiated
225 * the channel being closed or not:
226 * If we are the channel initiator, we will pay at least this feerate on the closing
227 * transaction. The upper-bound is set by
228 * [`ChannelConfig::force_close_avoidance_max_fee_satoshis`] plus our [`Normal`] fee
229 * estimate (or `target_feerate_sat_per_1000_weight`, if it is greater).
230 * If our counterparty is the channel initiator, we will refuse to accept a channel closure
231 * transaction feerate below `target_feerate_sat_per_1000_weight` (or the feerate which
232 * will appear on a force-closure transaction, whichever is lower).
234 * May generate a SendShutdown message event on success, which should be relayed.
236 * [`ChannelConfig::force_close_avoidance_max_fee_satoshis`]: crate::util::config::ChannelConfig::force_close_avoidance_max_fee_satoshis
237 * [`Background`]: crate::chain::chaininterface::ConfirmationTarget::Background
238 * [`Normal`]: crate::chain::chaininterface::ConfirmationTarget::Normal
240 public Result_NoneAPIErrorZ close_channel_with_target_feerate(byte[] channel_id, byte[] counterparty_node_id, int target_feerate_sats_per_1000_weight) {
241 long ret = bindings.ChannelManager_close_channel_with_target_feerate(this.ptr, InternalUtils.check_arr_len(channel_id, 32), InternalUtils.check_arr_len(counterparty_node_id, 33), target_feerate_sats_per_1000_weight);
242 Reference.reachabilityFence(this);
243 Reference.reachabilityFence(channel_id);
244 Reference.reachabilityFence(counterparty_node_id);
245 Reference.reachabilityFence(target_feerate_sats_per_1000_weight);
246 if (ret >= 0 && ret <= 4096) { return null; }
247 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
252 * Force closes a channel, immediately broadcasting the latest local transaction(s) and
253 * rejecting new HTLCs on the given channel. Fails if `channel_id` is unknown to
254 * the manager, or if the `counterparty_node_id` isn't the counterparty of the corresponding
257 public Result_NoneAPIErrorZ force_close_broadcasting_latest_txn(byte[] channel_id, byte[] counterparty_node_id) {
258 long ret = bindings.ChannelManager_force_close_broadcasting_latest_txn(this.ptr, InternalUtils.check_arr_len(channel_id, 32), InternalUtils.check_arr_len(counterparty_node_id, 33));
259 Reference.reachabilityFence(this);
260 Reference.reachabilityFence(channel_id);
261 Reference.reachabilityFence(counterparty_node_id);
262 if (ret >= 0 && ret <= 4096) { return null; }
263 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
268 * Force closes a channel, rejecting new HTLCs on the given channel but skips broadcasting
269 * the latest local transaction(s). Fails if `channel_id` is unknown to the manager, or if the
270 * `counterparty_node_id` isn't the counterparty of the corresponding channel.
272 * You can always get the latest local transaction(s) to broadcast from
273 * [`ChannelMonitor::get_latest_holder_commitment_txn`].
275 public Result_NoneAPIErrorZ force_close_without_broadcasting_txn(byte[] channel_id, byte[] counterparty_node_id) {
276 long ret = bindings.ChannelManager_force_close_without_broadcasting_txn(this.ptr, InternalUtils.check_arr_len(channel_id, 32), InternalUtils.check_arr_len(counterparty_node_id, 33));
277 Reference.reachabilityFence(this);
278 Reference.reachabilityFence(channel_id);
279 Reference.reachabilityFence(counterparty_node_id);
280 if (ret >= 0 && ret <= 4096) { return null; }
281 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
286 * Force close all channels, immediately broadcasting the latest local commitment transaction
287 * for each to the chain and rejecting new HTLCs on each.
289 public void force_close_all_channels_broadcasting_latest_txn() {
290 bindings.ChannelManager_force_close_all_channels_broadcasting_latest_txn(this.ptr);
291 Reference.reachabilityFence(this);
295 * Force close all channels rejecting new HTLCs on each but without broadcasting the latest
296 * local transaction(s).
298 public void force_close_all_channels_without_broadcasting_txn() {
299 bindings.ChannelManager_force_close_all_channels_without_broadcasting_txn(this.ptr);
300 Reference.reachabilityFence(this);
304 * Sends a payment along a given route.
306 * Value parameters are provided via the last hop in route, see documentation for RouteHop
307 * fields for more info.
309 * Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
310 * payment), we don't do anything to stop you! We always try to ensure that if the provided
311 * next hop knows the preimage to payment_hash they can claim an additional amount as
312 * specified in the last hop in the route! Thus, you should probably do your own
313 * payment_preimage tracking (which you should already be doing as they represent \"proof of
314 * payment\") and prevent double-sends yourself.
316 * May generate SendHTLCs message(s) event on success, which should be relayed.
318 * Each path may have a different return value, and PaymentSendValue may return a Vec with
319 * each entry matching the corresponding-index entry in the route paths, see
320 * PaymentSendFailure for more info.
322 * In general, a path may raise:
323 * APIError::RouteError when an invalid route or forwarding parameter (cltv_delta, fee,
324 * node public key) is specified.
325 * APIError::ChannelUnavailable if the next-hop channel is not available for updates
326 * (including due to previous monitor update failure or new permanent monitor update
328 * APIError::MonitorUpdateFailed if a new monitor update failure prevented sending the
331 * Note that depending on the type of the PaymentSendFailure the HTLC may have been
332 * irrevocably committed to on our end. In such a case, do NOT retry the payment with a
333 * different route unless you intend to pay twice!
335 * payment_secret is unrelated to payment_hash (or PaymentPreimage) and exists to authenticate
336 * the sender to the recipient and prevent payment-probing (deanonymization) attacks. For
337 * newer nodes, it will be provided to you in the invoice. If you do not have one, the Route
338 * must not contain multiple paths as multi-path payments require a recipient-provided
340 * If a payment_secret *is* provided, we assume that the invoice had the payment_secret feature
341 * bit set (either as required or as available). If multiple paths are present in the Route,
342 * we assume the invoice had the basic_mpp feature set.
344 * Note that payment_secret (or a relevant inner pointer) may be NULL or all-0s to represent None
346 public Result_PaymentIdPaymentSendFailureZ send_payment(Route route, byte[] payment_hash, @Nullable byte[] payment_secret) {
347 long ret = bindings.ChannelManager_send_payment(this.ptr, route == null ? 0 : route.ptr, InternalUtils.check_arr_len(payment_hash, 32), InternalUtils.check_arr_len(payment_secret, 32));
348 Reference.reachabilityFence(this);
349 Reference.reachabilityFence(route);
350 Reference.reachabilityFence(payment_hash);
351 Reference.reachabilityFence(payment_secret);
352 if (ret >= 0 && ret <= 4096) { return null; }
353 Result_PaymentIdPaymentSendFailureZ ret_hu_conv = Result_PaymentIdPaymentSendFailureZ.constr_from_ptr(ret);
354 if (this != null) { this.ptrs_to.add(route); };
359 * Retries a payment along the given [`Route`].
361 * Errors returned are a superset of those returned from [`send_payment`], so see
362 * [`send_payment`] documentation for more details on errors. This method will also error if the
363 * retry amount puts the payment more than 10% over the payment's total amount, if the payment
364 * for the given `payment_id` cannot be found (likely due to timeout or success), or if
365 * further retries have been disabled with [`abandon_payment`].
367 * [`send_payment`]: [`ChannelManager::send_payment`]
368 * [`abandon_payment`]: [`ChannelManager::abandon_payment`]
370 public Result_NonePaymentSendFailureZ retry_payment(Route route, byte[] payment_id) {
371 long ret = bindings.ChannelManager_retry_payment(this.ptr, route == null ? 0 : route.ptr, InternalUtils.check_arr_len(payment_id, 32));
372 Reference.reachabilityFence(this);
373 Reference.reachabilityFence(route);
374 Reference.reachabilityFence(payment_id);
375 if (ret >= 0 && ret <= 4096) { return null; }
376 Result_NonePaymentSendFailureZ ret_hu_conv = Result_NonePaymentSendFailureZ.constr_from_ptr(ret);
377 if (this != null) { this.ptrs_to.add(route); };
382 * Signals that no further retries for the given payment will occur.
384 * After this method returns, any future calls to [`retry_payment`] for the given `payment_id`
385 * will fail with [`PaymentSendFailure::ParameterError`]. If no such event has been generated,
386 * an [`Event::PaymentFailed`] event will be generated as soon as there are no remaining
387 * pending HTLCs for this payment.
389 * Note that calling this method does *not* prevent a payment from succeeding. You must still
390 * wait until you receive either a [`Event::PaymentFailed`] or [`Event::PaymentSent`] event to
391 * determine the ultimate status of a payment.
393 * [`retry_payment`]: Self::retry_payment
394 * [`Event::PaymentFailed`]: events::Event::PaymentFailed
395 * [`Event::PaymentSent`]: events::Event::PaymentSent
397 public void abandon_payment(byte[] payment_id) {
398 bindings.ChannelManager_abandon_payment(this.ptr, InternalUtils.check_arr_len(payment_id, 32));
399 Reference.reachabilityFence(this);
400 Reference.reachabilityFence(payment_id);
404 * Send a spontaneous payment, which is a payment that does not require the recipient to have
405 * generated an invoice. Optionally, you may specify the preimage. If you do choose to specify
406 * the preimage, it must be a cryptographically secure random value that no intermediate node
407 * would be able to guess -- otherwise, an intermediate node may claim the payment and it will
408 * never reach the recipient.
410 * See [`send_payment`] documentation for more details on the return value of this function.
412 * Similar to regular payments, you MUST NOT reuse a `payment_preimage` value. See
413 * [`send_payment`] for more information about the risks of duplicate preimage usage.
415 * Note that `route` must have exactly one path.
417 * [`send_payment`]: Self::send_payment
419 * Note that payment_preimage (or a relevant inner pointer) may be NULL or all-0s to represent None
421 public Result_C2Tuple_PaymentHashPaymentIdZPaymentSendFailureZ send_spontaneous_payment(Route route, @Nullable byte[] payment_preimage) {
422 long ret = bindings.ChannelManager_send_spontaneous_payment(this.ptr, route == null ? 0 : route.ptr, InternalUtils.check_arr_len(payment_preimage, 32));
423 Reference.reachabilityFence(this);
424 Reference.reachabilityFence(route);
425 Reference.reachabilityFence(payment_preimage);
426 if (ret >= 0 && ret <= 4096) { return null; }
427 Result_C2Tuple_PaymentHashPaymentIdZPaymentSendFailureZ ret_hu_conv = Result_C2Tuple_PaymentHashPaymentIdZPaymentSendFailureZ.constr_from_ptr(ret);
428 if (this != null) { this.ptrs_to.add(route); };
433 * Send a payment that is probing the given route for liquidity. We calculate the
434 * [`PaymentHash`] of probes based on a static secret and a random [`PaymentId`], which allows
435 * us to easily discern them from real payments.
437 public Result_C2Tuple_PaymentHashPaymentIdZPaymentSendFailureZ send_probe(RouteHop[] hops) {
438 long ret = bindings.ChannelManager_send_probe(this.ptr, hops != null ? Arrays.stream(hops).mapToLong(hops_conv_10 -> hops_conv_10 == null ? 0 : hops_conv_10.ptr).toArray() : null);
439 Reference.reachabilityFence(this);
440 Reference.reachabilityFence(hops);
441 if (ret >= 0 && ret <= 4096) { return null; }
442 Result_C2Tuple_PaymentHashPaymentIdZPaymentSendFailureZ ret_hu_conv = Result_C2Tuple_PaymentHashPaymentIdZPaymentSendFailureZ.constr_from_ptr(ret);
443 for (RouteHop hops_conv_10: hops) { if (this != null) { this.ptrs_to.add(hops_conv_10); }; };
448 * Call this upon creation of a funding transaction for the given channel.
450 * Returns an [`APIError::APIMisuseError`] if the funding_transaction spent non-SegWit outputs
451 * or if no output was found which matches the parameters in [`Event::FundingGenerationReady`].
453 * Returns [`APIError::APIMisuseError`] if the funding transaction is not final for propagation
454 * across the p2p network.
456 * Returns [`APIError::ChannelUnavailable`] if a funding transaction has already been provided
457 * for the channel or if the channel has been closed as indicated by [`Event::ChannelClosed`].
459 * May panic if the output found in the funding transaction is duplicative with some other
460 * channel (note that this should be trivially prevented by using unique funding transaction
463 * Do NOT broadcast the funding transaction yourself. When we have safely received our
464 * counterparty's signature the funding transaction will automatically be broadcast via the
465 * [`BroadcasterInterface`] provided when this `ChannelManager` was constructed.
467 * Note that this includes RBF or similar transaction replacement strategies - lightning does
468 * not currently support replacing a funding transaction on an existing channel. Instead,
469 * create a new channel with a conflicting funding transaction.
471 * Note to keep the miner incentives aligned in moving the blockchain forward, we recommend
472 * the wallet software generating the funding transaction to apply anti-fee sniping as
473 * implemented by Bitcoin Core wallet. See <https://bitcoinops.org/en/topics/fee-sniping/>
476 * [`Event::FundingGenerationReady`]: crate::util::events::Event::FundingGenerationReady
477 * [`Event::ChannelClosed`]: crate::util::events::Event::ChannelClosed
479 public Result_NoneAPIErrorZ funding_transaction_generated(byte[] temporary_channel_id, byte[] counterparty_node_id, byte[] funding_transaction) {
480 long ret = bindings.ChannelManager_funding_transaction_generated(this.ptr, InternalUtils.check_arr_len(temporary_channel_id, 32), InternalUtils.check_arr_len(counterparty_node_id, 33), funding_transaction);
481 Reference.reachabilityFence(this);
482 Reference.reachabilityFence(temporary_channel_id);
483 Reference.reachabilityFence(counterparty_node_id);
484 Reference.reachabilityFence(funding_transaction);
485 if (ret >= 0 && ret <= 4096) { return null; }
486 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
491 * Atomically updates the [`ChannelConfig`] for the given channels.
493 * Once the updates are applied, each eligible channel (advertised with a known short channel
494 * ID and a change in [`forwarding_fee_proportional_millionths`], [`forwarding_fee_base_msat`],
495 * or [`cltv_expiry_delta`]) has a [`BroadcastChannelUpdate`] event message generated
496 * containing the new [`ChannelUpdate`] message which should be broadcast to the network.
498 * Returns [`ChannelUnavailable`] when a channel is not found or an incorrect
499 * `counterparty_node_id` is provided.
501 * Returns [`APIMisuseError`] when a [`cltv_expiry_delta`] update is to be applied with a value
502 * below [`MIN_CLTV_EXPIRY_DELTA`].
504 * If an error is returned, none of the updates should be considered applied.
506 * [`forwarding_fee_proportional_millionths`]: ChannelConfig::forwarding_fee_proportional_millionths
507 * [`forwarding_fee_base_msat`]: ChannelConfig::forwarding_fee_base_msat
508 * [`cltv_expiry_delta`]: ChannelConfig::cltv_expiry_delta
509 * [`BroadcastChannelUpdate`]: events::MessageSendEvent::BroadcastChannelUpdate
510 * [`ChannelUpdate`]: msgs::ChannelUpdate
511 * [`ChannelUnavailable`]: APIError::ChannelUnavailable
512 * [`APIMisuseError`]: APIError::APIMisuseError
514 public Result_NoneAPIErrorZ update_channel_config(byte[] counterparty_node_id, byte[][] channel_ids, ChannelConfig config) {
515 long ret = bindings.ChannelManager_update_channel_config(this.ptr, InternalUtils.check_arr_len(counterparty_node_id, 33), channel_ids != null ? Arrays.stream(channel_ids).map(channel_ids_conv_8 -> InternalUtils.check_arr_len(channel_ids_conv_8, 32)).toArray(byte[][]::new) : null, config == null ? 0 : config.ptr);
516 Reference.reachabilityFence(this);
517 Reference.reachabilityFence(counterparty_node_id);
518 Reference.reachabilityFence(channel_ids);
519 Reference.reachabilityFence(config);
520 if (ret >= 0 && ret <= 4096) { return null; }
521 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
522 if (this != null) { this.ptrs_to.add(config); };
527 * Processes HTLCs which are pending waiting on random forward delay.
529 * Should only really ever be called in response to a PendingHTLCsForwardable event.
530 * Will likely generate further events.
532 public void process_pending_htlc_forwards() {
533 bindings.ChannelManager_process_pending_htlc_forwards(this.ptr);
534 Reference.reachabilityFence(this);
538 * Performs actions which should happen on startup and roughly once per minute thereafter.
540 * This currently includes:
541 * Increasing or decreasing the on-chain feerate estimates for our outbound channels,
542 * Broadcasting `ChannelUpdate` messages if we've been disconnected from our peer for more
543 * than a minute, informing the network that they should no longer attempt to route over
545 * Expiring a channel's previous `ChannelConfig` if necessary to only allow forwarding HTLCs
546 * with the current `ChannelConfig`.
548 * Note that this may cause reentrancy through `chain::Watch::update_channel` calls or feerate
551 public void timer_tick_occurred() {
552 bindings.ChannelManager_timer_tick_occurred(this.ptr);
553 Reference.reachabilityFence(this);
557 * Indicates that the preimage for payment_hash is unknown or the received amount is incorrect
558 * after a PaymentReceived event, failing the HTLC back to its origin and freeing resources
559 * along the path (including in our own channel on which we received it).
561 * Note that in some cases around unclean shutdown, it is possible the payment may have
562 * already been claimed by you via [`ChannelManager::claim_funds`] prior to you seeing (a
563 * second copy of) the [`events::Event::PaymentReceived`] event. Alternatively, the payment
564 * may have already been failed automatically by LDK if it was nearing its expiration time.
566 * While LDK will never claim a payment automatically on your behalf (i.e. without you calling
567 * [`ChannelManager::claim_funds`]), you should still monitor for
568 * [`events::Event::PaymentClaimed`] events even for payments you intend to fail, especially on
569 * startup during which time claims that were in-progress at shutdown may be replayed.
571 public void fail_htlc_backwards(byte[] payment_hash) {
572 bindings.ChannelManager_fail_htlc_backwards(this.ptr, InternalUtils.check_arr_len(payment_hash, 32));
573 Reference.reachabilityFence(this);
574 Reference.reachabilityFence(payment_hash);
578 * Provides a payment preimage in response to [`Event::PaymentReceived`], generating any
579 * [`MessageSendEvent`]s needed to claim the payment.
581 * Note that calling this method does *not* guarantee that the payment has been claimed. You
582 * must* wait for an [`Event::PaymentClaimed`] event which upon a successful claim will be
583 * provided to your [`EventHandler`] when [`process_pending_events`] is next called.
585 * Note that if you did not set an `amount_msat` when calling [`create_inbound_payment`] or
586 * [`create_inbound_payment_for_hash`] you must check that the amount in the `PaymentReceived`
587 * event matches your expectation. If you fail to do so and call this method, you may provide
588 * the sender \"proof-of-payment\" when they did not fulfill the full expected payment.
590 * [`Event::PaymentReceived`]: crate::util::events::Event::PaymentReceived
591 * [`Event::PaymentClaimed`]: crate::util::events::Event::PaymentClaimed
592 * [`process_pending_events`]: EventsProvider::process_pending_events
593 * [`create_inbound_payment`]: Self::create_inbound_payment
594 * [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
595 * [`get_and_clear_pending_msg_events`]: MessageSendEventsProvider::get_and_clear_pending_msg_events
597 public void claim_funds(byte[] payment_preimage) {
598 bindings.ChannelManager_claim_funds(this.ptr, InternalUtils.check_arr_len(payment_preimage, 32));
599 Reference.reachabilityFence(this);
600 Reference.reachabilityFence(payment_preimage);
604 * Gets the node_id held by this ChannelManager
606 public byte[] get_our_node_id() {
607 byte[] ret = bindings.ChannelManager_get_our_node_id(this.ptr);
608 Reference.reachabilityFence(this);
613 * Accepts a request to open a channel after a [`Event::OpenChannelRequest`].
615 * The `temporary_channel_id` parameter indicates which inbound channel should be accepted,
616 * and the `counterparty_node_id` parameter is the id of the peer which has requested to open
619 * The `user_channel_id` parameter will be provided back in
620 * [`Event::ChannelClosed::user_channel_id`] to allow tracking of which events correspond
621 * with which `accept_inbound_channel`/`accept_inbound_channel_from_trusted_peer_0conf` call.
623 * Note that this method will return an error and reject the channel, if it requires support
624 * for zero confirmations. Instead, `accept_inbound_channel_from_trusted_peer_0conf` must be
625 * used to accept such channels.
627 * [`Event::OpenChannelRequest`]: events::Event::OpenChannelRequest
628 * [`Event::ChannelClosed::user_channel_id`]: events::Event::ChannelClosed::user_channel_id
630 public Result_NoneAPIErrorZ accept_inbound_channel(byte[] temporary_channel_id, byte[] counterparty_node_id, long user_channel_id) {
631 long ret = bindings.ChannelManager_accept_inbound_channel(this.ptr, InternalUtils.check_arr_len(temporary_channel_id, 32), InternalUtils.check_arr_len(counterparty_node_id, 33), user_channel_id);
632 Reference.reachabilityFence(this);
633 Reference.reachabilityFence(temporary_channel_id);
634 Reference.reachabilityFence(counterparty_node_id);
635 Reference.reachabilityFence(user_channel_id);
636 if (ret >= 0 && ret <= 4096) { return null; }
637 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
642 * Accepts a request to open a channel after a [`events::Event::OpenChannelRequest`], treating
643 * it as confirmed immediately.
645 * The `user_channel_id` parameter will be provided back in
646 * [`Event::ChannelClosed::user_channel_id`] to allow tracking of which events correspond
647 * with which `accept_inbound_channel`/`accept_inbound_channel_from_trusted_peer_0conf` call.
649 * Unlike [`ChannelManager::accept_inbound_channel`], this method accepts the incoming channel
650 * and (if the counterparty agrees), enables forwarding of payments immediately.
652 * This fully trusts that the counterparty has honestly and correctly constructed the funding
653 * transaction and blindly assumes that it will eventually confirm.
655 * If it does not confirm before we decide to close the channel, or if the funding transaction
656 * does not pay to the correct script the correct amount, *you will lose funds*.
658 * [`Event::OpenChannelRequest`]: events::Event::OpenChannelRequest
659 * [`Event::ChannelClosed::user_channel_id`]: events::Event::ChannelClosed::user_channel_id
661 public Result_NoneAPIErrorZ accept_inbound_channel_from_trusted_peer_0conf(byte[] temporary_channel_id, byte[] counterparty_node_id, long user_channel_id) {
662 long ret = bindings.ChannelManager_accept_inbound_channel_from_trusted_peer_0conf(this.ptr, InternalUtils.check_arr_len(temporary_channel_id, 32), InternalUtils.check_arr_len(counterparty_node_id, 33), user_channel_id);
663 Reference.reachabilityFence(this);
664 Reference.reachabilityFence(temporary_channel_id);
665 Reference.reachabilityFence(counterparty_node_id);
666 Reference.reachabilityFence(user_channel_id);
667 if (ret >= 0 && ret <= 4096) { return null; }
668 Result_NoneAPIErrorZ ret_hu_conv = Result_NoneAPIErrorZ.constr_from_ptr(ret);
673 * Gets a payment secret and payment hash for use in an invoice given to a third party wishing
676 * This differs from [`create_inbound_payment_for_hash`] only in that it generates the
677 * [`PaymentHash`] and [`PaymentPreimage`] for you.
679 * The [`PaymentPreimage`] will ultimately be returned to you in the [`PaymentReceived`], which
680 * will have the [`PaymentReceived::payment_preimage`] field filled in. That should then be
681 * passed directly to [`claim_funds`].
683 * See [`create_inbound_payment_for_hash`] for detailed documentation on behavior and requirements.
685 * Note that a malicious eavesdropper can intuit whether an inbound payment was created by
686 * `create_inbound_payment` or `create_inbound_payment_for_hash` based on runtime.
690 * If you register an inbound payment with this method, then serialize the `ChannelManager`, then
691 * deserialize it with a node running 0.0.103 and earlier, the payment will fail to be received.
693 * Errors if `min_value_msat` is greater than total bitcoin supply.
695 * [`claim_funds`]: Self::claim_funds
696 * [`PaymentReceived`]: events::Event::PaymentReceived
697 * [`PaymentReceived::payment_preimage`]: events::Event::PaymentReceived::payment_preimage
698 * [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
700 public Result_C2Tuple_PaymentHashPaymentSecretZNoneZ create_inbound_payment(Option_u64Z min_value_msat, int invoice_expiry_delta_secs) {
701 long ret = bindings.ChannelManager_create_inbound_payment(this.ptr, min_value_msat.ptr, invoice_expiry_delta_secs);
702 Reference.reachabilityFence(this);
703 Reference.reachabilityFence(min_value_msat);
704 Reference.reachabilityFence(invoice_expiry_delta_secs);
705 if (ret >= 0 && ret <= 4096) { return null; }
706 Result_C2Tuple_PaymentHashPaymentSecretZNoneZ ret_hu_conv = Result_C2Tuple_PaymentHashPaymentSecretZNoneZ.constr_from_ptr(ret);
711 * Legacy version of [`create_inbound_payment`]. Use this method if you wish to share
712 * serialized state with LDK node(s) running 0.0.103 and earlier.
714 * May panic if `invoice_expiry_delta_secs` is greater than one year.
717 * This method is deprecated and will be removed soon.
719 * [`create_inbound_payment`]: Self::create_inbound_payment
721 public Result_C2Tuple_PaymentHashPaymentSecretZAPIErrorZ create_inbound_payment_legacy(Option_u64Z min_value_msat, int invoice_expiry_delta_secs) {
722 long ret = bindings.ChannelManager_create_inbound_payment_legacy(this.ptr, min_value_msat.ptr, invoice_expiry_delta_secs);
723 Reference.reachabilityFence(this);
724 Reference.reachabilityFence(min_value_msat);
725 Reference.reachabilityFence(invoice_expiry_delta_secs);
726 if (ret >= 0 && ret <= 4096) { return null; }
727 Result_C2Tuple_PaymentHashPaymentSecretZAPIErrorZ ret_hu_conv = Result_C2Tuple_PaymentHashPaymentSecretZAPIErrorZ.constr_from_ptr(ret);
732 * Gets a [`PaymentSecret`] for a given [`PaymentHash`], for which the payment preimage is
733 * stored external to LDK.
735 * A [`PaymentReceived`] event will only be generated if the [`PaymentSecret`] matches a
736 * payment secret fetched via this method or [`create_inbound_payment`], and which is at least
737 * the `min_value_msat` provided here, if one is provided.
739 * The [`PaymentHash`] (and corresponding [`PaymentPreimage`]) should be globally unique, though
740 * note that LDK will not stop you from registering duplicate payment hashes for inbound
743 * `min_value_msat` should be set if the invoice being generated contains a value. Any payment
744 * received for the returned [`PaymentHash`] will be required to be at least `min_value_msat`
745 * before a [`PaymentReceived`] event will be generated, ensuring that we do not provide the
746 * sender \"proof-of-payment\" unless they have paid the required amount.
748 * `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
749 * in excess of the current time. This should roughly match the expiry time set in the invoice.
750 * After this many seconds, we will remove the inbound payment, resulting in any attempts to
751 * pay the invoice failing. The BOLT spec suggests 3,600 secs as a default validity time for
752 * invoices when no timeout is set.
754 * Note that we use block header time to time-out pending inbound payments (with some margin
755 * to compensate for the inaccuracy of block header timestamps). Thus, in practice we will
756 * accept a payment and generate a [`PaymentReceived`] event for some time after the expiry.
757 * If you need exact expiry semantics, you should enforce them upon receipt of
758 * [`PaymentReceived`].
760 * Note that invoices generated for inbound payments should have their `min_final_cltv_expiry`
761 * set to at least [`MIN_FINAL_CLTV_EXPIRY`].
763 * Note that a malicious eavesdropper can intuit whether an inbound payment was created by
764 * `create_inbound_payment` or `create_inbound_payment_for_hash` based on runtime.
768 * If you register an inbound payment with this method, then serialize the `ChannelManager`, then
769 * deserialize it with a node running 0.0.103 and earlier, the payment will fail to be received.
771 * Errors if `min_value_msat` is greater than total bitcoin supply.
773 * [`create_inbound_payment`]: Self::create_inbound_payment
774 * [`PaymentReceived`]: events::Event::PaymentReceived
776 public Result_PaymentSecretNoneZ create_inbound_payment_for_hash(byte[] payment_hash, Option_u64Z min_value_msat, int invoice_expiry_delta_secs) {
777 long ret = bindings.ChannelManager_create_inbound_payment_for_hash(this.ptr, InternalUtils.check_arr_len(payment_hash, 32), min_value_msat.ptr, invoice_expiry_delta_secs);
778 Reference.reachabilityFence(this);
779 Reference.reachabilityFence(payment_hash);
780 Reference.reachabilityFence(min_value_msat);
781 Reference.reachabilityFence(invoice_expiry_delta_secs);
782 if (ret >= 0 && ret <= 4096) { return null; }
783 Result_PaymentSecretNoneZ ret_hu_conv = Result_PaymentSecretNoneZ.constr_from_ptr(ret);
788 * Legacy version of [`create_inbound_payment_for_hash`]. Use this method if you wish to share
789 * serialized state with LDK node(s) running 0.0.103 and earlier.
791 * May panic if `invoice_expiry_delta_secs` is greater than one year.
794 * This method is deprecated and will be removed soon.
796 * [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
798 public Result_PaymentSecretAPIErrorZ create_inbound_payment_for_hash_legacy(byte[] payment_hash, Option_u64Z min_value_msat, int invoice_expiry_delta_secs) {
799 long ret = bindings.ChannelManager_create_inbound_payment_for_hash_legacy(this.ptr, InternalUtils.check_arr_len(payment_hash, 32), min_value_msat.ptr, invoice_expiry_delta_secs);
800 Reference.reachabilityFence(this);
801 Reference.reachabilityFence(payment_hash);
802 Reference.reachabilityFence(min_value_msat);
803 Reference.reachabilityFence(invoice_expiry_delta_secs);
804 if (ret >= 0 && ret <= 4096) { return null; }
805 Result_PaymentSecretAPIErrorZ ret_hu_conv = Result_PaymentSecretAPIErrorZ.constr_from_ptr(ret);
810 * Gets an LDK-generated payment preimage from a payment hash and payment secret that were
811 * previously returned from [`create_inbound_payment`].
813 * [`create_inbound_payment`]: Self::create_inbound_payment
815 public Result_PaymentPreimageAPIErrorZ get_payment_preimage(byte[] payment_hash, byte[] payment_secret) {
816 long ret = bindings.ChannelManager_get_payment_preimage(this.ptr, InternalUtils.check_arr_len(payment_hash, 32), InternalUtils.check_arr_len(payment_secret, 32));
817 Reference.reachabilityFence(this);
818 Reference.reachabilityFence(payment_hash);
819 Reference.reachabilityFence(payment_secret);
820 if (ret >= 0 && ret <= 4096) { return null; }
821 Result_PaymentPreimageAPIErrorZ ret_hu_conv = Result_PaymentPreimageAPIErrorZ.constr_from_ptr(ret);
826 * Gets a fake short channel id for use in receiving [phantom node payments]. These fake scids
827 * are used when constructing the phantom invoice's route hints.
829 * [phantom node payments]: crate::chain::keysinterface::PhantomKeysManager
831 public long get_phantom_scid() {
832 long ret = bindings.ChannelManager_get_phantom_scid(this.ptr);
833 Reference.reachabilityFence(this);
838 * Gets route hints for use in receiving [phantom node payments].
840 * [phantom node payments]: crate::chain::keysinterface::PhantomKeysManager
842 public PhantomRouteHints get_phantom_route_hints() {
843 long ret = bindings.ChannelManager_get_phantom_route_hints(this.ptr);
844 Reference.reachabilityFence(this);
845 if (ret >= 0 && ret <= 4096) { return null; }
846 org.ldk.structs.PhantomRouteHints ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.PhantomRouteHints(null, ret); }
847 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
852 * Constructs a new MessageSendEventsProvider which calls the relevant methods on this_arg.
853 * This copies the `inner` pointer in this_arg and thus the returned MessageSendEventsProvider must be freed before this_arg is
855 public MessageSendEventsProvider as_MessageSendEventsProvider() {
856 long ret = bindings.ChannelManager_as_MessageSendEventsProvider(this.ptr);
857 Reference.reachabilityFence(this);
858 if (ret >= 0 && ret <= 4096) { return null; }
859 MessageSendEventsProvider ret_hu_conv = new MessageSendEventsProvider(null, ret);
860 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
865 * Constructs a new EventsProvider which calls the relevant methods on this_arg.
866 * This copies the `inner` pointer in this_arg and thus the returned EventsProvider must be freed before this_arg is
868 public EventsProvider as_EventsProvider() {
869 long ret = bindings.ChannelManager_as_EventsProvider(this.ptr);
870 Reference.reachabilityFence(this);
871 if (ret >= 0 && ret <= 4096) { return null; }
872 EventsProvider ret_hu_conv = new EventsProvider(null, ret);
873 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
878 * Constructs a new Listen which calls the relevant methods on this_arg.
879 * This copies the `inner` pointer in this_arg and thus the returned Listen must be freed before this_arg is
881 public Listen as_Listen() {
882 long ret = bindings.ChannelManager_as_Listen(this.ptr);
883 Reference.reachabilityFence(this);
884 if (ret >= 0 && ret <= 4096) { return null; }
885 Listen ret_hu_conv = new Listen(null, ret);
886 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
891 * Constructs a new Confirm which calls the relevant methods on this_arg.
892 * This copies the `inner` pointer in this_arg and thus the returned Confirm must be freed before this_arg is
894 public Confirm as_Confirm() {
895 long ret = bindings.ChannelManager_as_Confirm(this.ptr);
896 Reference.reachabilityFence(this);
897 if (ret >= 0 && ret <= 4096) { return null; }
898 Confirm ret_hu_conv = new Confirm(null, ret);
899 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
904 * Blocks until ChannelManager needs to be persisted or a timeout is reached. It returns a bool
905 * indicating whether persistence is necessary. Only one listener on
906 * `await_persistable_update` or `await_persistable_update_timeout` is guaranteed to be woken
909 * Note that this method is not available with the `no-std` feature.
911 public boolean await_persistable_update_timeout(long max_wait) {
912 boolean ret = bindings.ChannelManager_await_persistable_update_timeout(this.ptr, max_wait);
913 Reference.reachabilityFence(this);
914 Reference.reachabilityFence(max_wait);
919 * Blocks until ChannelManager needs to be persisted. Only one listener on
920 * `await_persistable_update` or `await_persistable_update_timeout` is guaranteed to be woken
923 public void await_persistable_update() {
924 bindings.ChannelManager_await_persistable_update(this.ptr);
925 Reference.reachabilityFence(this);
929 * Gets a [`Future`] that completes when a persistable update is available. Note that
930 * callbacks registered on the [`Future`] MUST NOT call back into this [`ChannelManager`] and
931 * should instead register actions to be taken later.
933 public Future get_persistable_update_future() {
934 long ret = bindings.ChannelManager_get_persistable_update_future(this.ptr);
935 Reference.reachabilityFence(this);
936 if (ret >= 0 && ret <= 4096) { return null; }
937 org.ldk.structs.Future ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.Future(null, ret); }
938 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
943 * Gets the latest best block which was connected either via the [`chain::Listen`] or
944 * [`chain::Confirm`] interfaces.
946 public BestBlock current_best_block() {
947 long ret = bindings.ChannelManager_current_best_block(this.ptr);
948 Reference.reachabilityFence(this);
949 if (ret >= 0 && ret <= 4096) { return null; }
950 org.ldk.structs.BestBlock ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.BestBlock(null, ret); }
951 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
956 * Constructs a new ChannelMessageHandler which calls the relevant methods on this_arg.
957 * This copies the `inner` pointer in this_arg and thus the returned ChannelMessageHandler must be freed before this_arg is
959 public ChannelMessageHandler as_ChannelMessageHandler() {
960 long ret = bindings.ChannelManager_as_ChannelMessageHandler(this.ptr);
961 Reference.reachabilityFence(this);
962 if (ret >= 0 && ret <= 4096) { return null; }
963 ChannelMessageHandler ret_hu_conv = new ChannelMessageHandler(null, ret);
964 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };
969 * Serialize the ChannelManager object into a byte array which can be read by ChannelManager_read
971 public byte[] write() {
972 byte[] ret = bindings.ChannelManager_write(this.ptr);
973 Reference.reachabilityFence(this);
978 * Constructs a new Payer which calls the relevant methods on this_arg.
979 * This copies the `inner` pointer in this_arg and thus the returned Payer must be freed before this_arg is
981 public Payer as_Payer() {
982 long ret = bindings.ChannelManager_as_Payer(this.ptr);
983 Reference.reachabilityFence(this);
984 if (ret >= 0 && ret <= 4096) { return null; }
985 Payer ret_hu_conv = new Payer(null, ret);
986 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.add(this); };