[ldk-java] / src / main / java / org / ldk / structs / Event.java

package org.ldk.structs;

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;


/**
 * An Event which you should probably take some action in response to.
 * 
 * Note that while Writeable and Readable are implemented for Event, you probably shouldn't use
 * them directly as they don't round-trip exactly (for example FundingGenerationReady is never
 * written as it makes no sense to respond to it after reconnecting to peers).
 */
@SuppressWarnings("unchecked") // We correctly assign various generic arrays
public class Event extends CommonBase {
        private Event(Object _dummy, long ptr) { super(ptr); }
        @Override @SuppressWarnings("deprecation")
        protected void finalize() throws Throwable {
                super.finalize();
                if (ptr != 0) { bindings.Event_free(ptr); }
        }
        static Event constr_from_ptr(long ptr) {
                bindings.LDKEvent raw_val = bindings.LDKEvent_ref_from_ptr(ptr);
                if (raw_val.getClass() == bindings.LDKEvent.FundingGenerationReady.class) {
                        return new FundingGenerationReady(ptr, (bindings.LDKEvent.FundingGenerationReady)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.PaymentReceived.class) {
                        return new PaymentReceived(ptr, (bindings.LDKEvent.PaymentReceived)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.PaymentSent.class) {
                        return new PaymentSent(ptr, (bindings.LDKEvent.PaymentSent)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.PaymentPathFailed.class) {
                        return new PaymentPathFailed(ptr, (bindings.LDKEvent.PaymentPathFailed)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.PaymentFailed.class) {
                        return new PaymentFailed(ptr, (bindings.LDKEvent.PaymentFailed)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.PendingHTLCsForwardable.class) {
                        return new PendingHTLCsForwardable(ptr, (bindings.LDKEvent.PendingHTLCsForwardable)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.SpendableOutputs.class) {
                        return new SpendableOutputs(ptr, (bindings.LDKEvent.SpendableOutputs)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.PaymentForwarded.class) {
                        return new PaymentForwarded(ptr, (bindings.LDKEvent.PaymentForwarded)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.ChannelClosed.class) {
                        return new ChannelClosed(ptr, (bindings.LDKEvent.ChannelClosed)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.DiscardFunding.class) {
                        return new DiscardFunding(ptr, (bindings.LDKEvent.DiscardFunding)raw_val);
                }
                if (raw_val.getClass() == bindings.LDKEvent.PaymentPathSuccessful.class) {
                        return new PaymentPathSuccessful(ptr, (bindings.LDKEvent.PaymentPathSuccessful)raw_val);
                }
                assert false; return null; // Unreachable without extending the (internal) bindings interface
        }

        /**
         * Used to indicate that the client should generate a funding transaction with the given
         * parameters and then call [`ChannelManager::funding_transaction_generated`].
         * Generated in [`ChannelManager`] message handling.
         * Note that *all inputs* in the funding transaction must spend SegWit outputs or your
         * counterparty can steal your funds!
         * 
         * [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
         * [`ChannelManager::funding_transaction_generated`]: crate::ln::channelmanager::ChannelManager::funding_transaction_generated
         */
        public final static class FundingGenerationReady extends Event {
                /**
                 * The random channel_id we picked which you'll need to pass into
                 * ChannelManager::funding_transaction_generated.
                */
                public final byte[] temporary_channel_id;
                /**
                 * The value, in satoshis, that the output should have.
                */
                public final long channel_value_satoshis;
                /**
                 * The script which should be used in the transaction output.
                */
                public final byte[] output_script;
                /**
                 * The `user_channel_id` value passed in to [`ChannelManager::create_channel`], or 0 for
                 * an inbound channel.
                 * 
                 * [`ChannelManager::create_channel`]: crate::ln::channelmanager::ChannelManager::create_channel
                */
                public final long user_channel_id;
                private FundingGenerationReady(long ptr, bindings.LDKEvent.FundingGenerationReady obj) {
                        super(null, ptr);
                        this.temporary_channel_id = obj.temporary_channel_id;
                        this.channel_value_satoshis = obj.channel_value_satoshis;
                        this.output_script = obj.output_script;
                        this.user_channel_id = obj.user_channel_id;
                }
        }
        /**
         * Indicates we've received money! Just gotta dig out that payment preimage and feed it to
         * [`ChannelManager::claim_funds`] to get it....
         * Note that if the preimage is not known, you should call
         * [`ChannelManager::fail_htlc_backwards`] to free up resources for this HTLC and avoid
         * network congestion.
         * If you fail to call either [`ChannelManager::claim_funds`] or
         * [`ChannelManager::fail_htlc_backwards`] within the HTLC's timeout, the HTLC will be
         * automatically failed.
         * 
         * # Note
         * LDK will not stop an inbound payment from being paid multiple times, so multiple
         * `PaymentReceived` events may be generated for the same payment.
         * 
         * [`ChannelManager::claim_funds`]: crate::ln::channelmanager::ChannelManager::claim_funds
         * [`ChannelManager::fail_htlc_backwards`]: crate::ln::channelmanager::ChannelManager::fail_htlc_backwards
         */
        public final static class PaymentReceived extends Event {
                /**
                 * The hash for which the preimage should be handed to the ChannelManager. Note that LDK will
                 * not stop you from registering duplicate payment hashes for inbound payments.
                */
                public final byte[] payment_hash;
                /**
                 * The value, in thousandths of a satoshi, that this payment is for.
                */
                public final long amt;
                /**
                 * Information for claiming this received payment, based on whether the purpose of the
                 * payment is to pay an invoice or to send a spontaneous payment.
                */
                public final PaymentPurpose purpose;
                private PaymentReceived(long ptr, bindings.LDKEvent.PaymentReceived obj) {
                        super(null, ptr);
                        this.payment_hash = obj.payment_hash;
                        this.amt = obj.amt;
                        long purpose = obj.purpose;
                        PaymentPurpose purpose_hu_conv = PaymentPurpose.constr_from_ptr(purpose);
                        purpose_hu_conv.ptrs_to.add(this);
                        this.purpose = purpose_hu_conv;
                }
        }
        /**
         * Indicates an outbound payment we made succeeded (i.e. it made it all the way to its target
         * and we got back the payment preimage for it).
         * 
         * Note for MPP payments: in rare cases, this event may be preceded by a `PaymentPathFailed`
         * event. In this situation, you SHOULD treat this payment as having succeeded.
         */
        public final static class PaymentSent extends Event {
                /**
                 * The id returned by [`ChannelManager::send_payment`] and used with
                 * [`ChannelManager::retry_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                 * [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
                 * 
                 * Note that this (or a relevant inner pointer) may be NULL or all-0s to represent None
                */
                @Nullable public final byte[] payment_id;
                /**
                 * The preimage to the hash given to ChannelManager::send_payment.
                 * Note that this serves as a payment receipt, if you wish to have such a thing, you must
                 * store it somehow!
                */
                public final byte[] payment_preimage;
                /**
                 * The hash that was given to [`ChannelManager::send_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                */
                public final byte[] payment_hash;
                /**
                 * The total fee which was spent at intermediate hops in this payment, across all paths.
                 * 
                 * Note that, like [`Route::get_total_fees`] this does *not* include any potential
                 * overpayment to the recipient node.
                 * 
                 * If the recipient or an intermediate node misbehaves and gives us free money, this may
                 * overstate the amount paid, though this is unlikely.
                 * 
                 * [`Route::get_total_fees`]: crate::routing::router::Route::get_total_fees
                */
                public final Option_u64Z fee_paid_msat;
                private PaymentSent(long ptr, bindings.LDKEvent.PaymentSent obj) {
                        super(null, ptr);
                        this.payment_id = obj.payment_id;
                        this.payment_preimage = obj.payment_preimage;
                        this.payment_hash = obj.payment_hash;
                        long fee_paid_msat = obj.fee_paid_msat;
                        Option_u64Z fee_paid_msat_hu_conv = Option_u64Z.constr_from_ptr(fee_paid_msat);
                        fee_paid_msat_hu_conv.ptrs_to.add(this);
                        this.fee_paid_msat = fee_paid_msat_hu_conv;
                }
        }
        /**
         * Indicates an outbound HTLC we sent failed. Probably some intermediary node dropped
         * something. You may wish to retry with a different route.
         * 
         * Note that this does *not* indicate that all paths for an MPP payment have failed, see
         * [`Event::PaymentFailed`] and [`all_paths_failed`].
         * 
         * [`all_paths_failed`]: Self::all_paths_failed
         */
        public final static class PaymentPathFailed extends Event {
                /**
                 * The id returned by [`ChannelManager::send_payment`] and used with
                 * [`ChannelManager::retry_payment`] and [`ChannelManager::abandon_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                 * [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
                 * [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
                 * 
                 * Note that this (or a relevant inner pointer) may be NULL or all-0s to represent None
                */
                @Nullable public final byte[] payment_id;
                /**
                 * The hash that was given to [`ChannelManager::send_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                */
                public final byte[] payment_hash;
                /**
                 * Indicates the payment was rejected for some reason by the recipient. This implies that
                 * the payment has failed, not just the route in question. If this is not set, you may
                 * retry the payment via a different route.
                */
                public final boolean rejected_by_dest;
                /**
                 * Any failure information conveyed via the Onion return packet by a node along the failed
                 * payment route.
                 * 
                 * Should be applied to the [`NetworkGraph`] so that routing decisions can take into
                 * account the update. [`NetGraphMsgHandler`] is capable of doing this.
                 * 
                 * [`NetworkGraph`]: crate::routing::network_graph::NetworkGraph
                 * [`NetGraphMsgHandler`]: crate::routing::network_graph::NetGraphMsgHandler
                */
                public final Option_NetworkUpdateZ network_update;
                /**
                 * For both single-path and multi-path payments, this is set if all paths of the payment have
                 * failed. This will be set to false if (1) this is an MPP payment and (2) other parts of the
                 * larger MPP payment were still in flight when this event was generated.
                 * 
                 * Note that if you are retrying individual MPP parts, using this value to determine if a
                 * payment has fully failed is race-y. Because multiple failures can happen prior to events
                 * being processed, you may retry in response to a first failure, with a second failure
                 * (with `all_paths_failed` set) still pending. Then, when the second failure is processed
                 * you will see `all_paths_failed` set even though the retry of the first failure still
                 * has an associated in-flight HTLC. See (1) for an example of such a failure.
                 * 
                 * If you wish to retry individual MPP parts and learn when a payment has failed, you must
                 * call [`ChannelManager::abandon_payment`] and wait for a [`Event::PaymentFailed`] event.
                 * 
                 * (1) <https://github.com/lightningdevkit/rust-lightning/issues/1164>
                 * 
                 * [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
                */
                public final boolean all_paths_failed;
                /**
                 * The payment path that failed.
                */
                public final RouteHop[] path;
                /**
                 * The channel responsible for the failed payment path.
                 * 
                 * If this is `Some`, then the corresponding channel should be avoided when the payment is
                 * retried. May be `None` for older [`Event`] serializations.
                */
                public final Option_u64Z short_channel_id;
                /**
                 * Parameters needed to compute a new [`Route`] when retrying the failed payment path.
                 * 
                 * See [`find_route`] for details.
                 * 
                 * [`Route`]: crate::routing::router::Route
                 * [`find_route`]: crate::routing::router::find_route
                 * 
                 * Note that this (or a relevant inner pointer) may be NULL or all-0s to represent None
                */
                @Nullable public final RouteParameters retry;
                private PaymentPathFailed(long ptr, bindings.LDKEvent.PaymentPathFailed obj) {
                        super(null, ptr);
                        this.payment_id = obj.payment_id;
                        this.payment_hash = obj.payment_hash;
                        this.rejected_by_dest = obj.rejected_by_dest;
                        long network_update = obj.network_update;
                        Option_NetworkUpdateZ network_update_hu_conv = Option_NetworkUpdateZ.constr_from_ptr(network_update);
                        network_update_hu_conv.ptrs_to.add(this);
                        this.network_update = network_update_hu_conv;
                        this.all_paths_failed = obj.all_paths_failed;
                        long[] path = obj.path;
                        int path_conv_10_len = path.length;
                        RouteHop[] path_conv_10_arr = new RouteHop[path_conv_10_len];
                        for (int k = 0; k < path_conv_10_len; k++) {
                                long path_conv_10 = path[k];
                                RouteHop path_conv_10_hu_conv = null; if (path_conv_10 < 0 || path_conv_10 > 4096) { path_conv_10_hu_conv = new RouteHop(null, path_conv_10); }
                                path_conv_10_hu_conv.ptrs_to.add(this);
                                path_conv_10_arr[k] = path_conv_10_hu_conv;
                        }
                        this.path = path_conv_10_arr;
                        long short_channel_id = obj.short_channel_id;
                        Option_u64Z short_channel_id_hu_conv = Option_u64Z.constr_from_ptr(short_channel_id);
                        short_channel_id_hu_conv.ptrs_to.add(this);
                        this.short_channel_id = short_channel_id_hu_conv;
                        long retry = obj.retry;
                        RouteParameters retry_hu_conv = null; if (retry < 0 || retry > 4096) { retry_hu_conv = new RouteParameters(null, retry); }
                        retry_hu_conv.ptrs_to.add(this);
                        this.retry = retry_hu_conv;
                }
        }
        /**
         * Indicates an outbound payment failed. Individual [`Event::PaymentPathFailed`] events
         * provide failure information for each MPP part in the payment.
         * 
         * This event is provided once there are no further pending HTLCs for the payment and the
         * payment is no longer retryable, either due to a several-block timeout or because
         * [`ChannelManager::abandon_payment`] was previously called for the corresponding payment.
         * 
         * [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
         */
        public final static class PaymentFailed extends Event {
                /**
                 * The id returned by [`ChannelManager::send_payment`] and used with
                 * [`ChannelManager::retry_payment`] and [`ChannelManager::abandon_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                 * [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
                 * [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
                */
                public final byte[] payment_id;
                /**
                 * The hash that was given to [`ChannelManager::send_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                */
                public final byte[] payment_hash;
                private PaymentFailed(long ptr, bindings.LDKEvent.PaymentFailed obj) {
                        super(null, ptr);
                        this.payment_id = obj.payment_id;
                        this.payment_hash = obj.payment_hash;
                }
        }
        /**
         * Used to indicate that [`ChannelManager::process_pending_htlc_forwards`] should be called at
         * a time in the future.
         * 
         * [`ChannelManager::process_pending_htlc_forwards`]: crate::ln::channelmanager::ChannelManager::process_pending_htlc_forwards
         */
        public final static class PendingHTLCsForwardable extends Event {
                /**
                 * The minimum amount of time that should be waited prior to calling
                 * process_pending_htlc_forwards. To increase the effort required to correlate payments,
                 * you should wait a random amount of time in roughly the range (now + time_forwardable,
                 * now + 5*time_forwardable).
                */
                public final long time_forwardable;
                private PendingHTLCsForwardable(long ptr, bindings.LDKEvent.PendingHTLCsForwardable obj) {
                        super(null, ptr);
                        this.time_forwardable = obj.time_forwardable;
                }
        }
        /**
         * Used to indicate that an output which you should know how to spend was confirmed on chain
         * and is now spendable.
         * Such an output will *not* ever be spent by rust-lightning, and are not at risk of your
         * counterparty spending them due to some kind of timeout. Thus, you need to store them
         * somewhere and spend them when you create on-chain transactions.
         */
        public final static class SpendableOutputs extends Event {
                /**
                 * The outputs which you should store as spendable by you.
                */
                public final SpendableOutputDescriptor[] outputs;
                private SpendableOutputs(long ptr, bindings.LDKEvent.SpendableOutputs obj) {
                        super(null, ptr);
                        long[] outputs = obj.outputs;
                        int outputs_conv_27_len = outputs.length;
                        SpendableOutputDescriptor[] outputs_conv_27_arr = new SpendableOutputDescriptor[outputs_conv_27_len];
                        for (int b = 0; b < outputs_conv_27_len; b++) {
                                long outputs_conv_27 = outputs[b];
                                SpendableOutputDescriptor outputs_conv_27_hu_conv = SpendableOutputDescriptor.constr_from_ptr(outputs_conv_27);
                                outputs_conv_27_hu_conv.ptrs_to.add(this);
                                outputs_conv_27_arr[b] = outputs_conv_27_hu_conv;
                        }
                        this.outputs = outputs_conv_27_arr;
                }
        }
        /**
         * This event is generated when a payment has been successfully forwarded through us and a
         * forwarding fee earned.
         */
        public final static class PaymentForwarded extends Event {
                /**
                 * The fee, in milli-satoshis, which was earned as a result of the payment.
                 * 
                 * Note that if we force-closed the channel over which we forwarded an HTLC while the HTLC
                 * was pending, the amount the next hop claimed will have been rounded down to the nearest
                 * whole satoshi. Thus, the fee calculated here may be higher than expected as we still
                 * claimed the full value in millisatoshis from the source. In this case,
                 * `claim_from_onchain_tx` will be set.
                 * 
                 * If the channel which sent us the payment has been force-closed, we will claim the funds
                 * via an on-chain transaction. In that case we do not yet know the on-chain transaction
                 * fees which we will spend and will instead set this to `None`. It is possible duplicate
                 * `PaymentForwarded` events are generated for the same payment iff `fee_earned_msat` is
                 * `None`.
                */
                public final Option_u64Z fee_earned_msat;
                /**
                 * If this is `true`, the forwarded HTLC was claimed by our counterparty via an on-chain
                 * transaction.
                */
                public final boolean claim_from_onchain_tx;
                private PaymentForwarded(long ptr, bindings.LDKEvent.PaymentForwarded obj) {
                        super(null, ptr);
                        long fee_earned_msat = obj.fee_earned_msat;
                        Option_u64Z fee_earned_msat_hu_conv = Option_u64Z.constr_from_ptr(fee_earned_msat);
                        fee_earned_msat_hu_conv.ptrs_to.add(this);
                        this.fee_earned_msat = fee_earned_msat_hu_conv;
                        this.claim_from_onchain_tx = obj.claim_from_onchain_tx;
                }
        }
        /**
         * Used to indicate that a channel with the given `channel_id` is in the process of closure.
         */
        public final static class ChannelClosed extends Event {
                /**
                 * The channel_id of the channel which has been closed. Note that on-chain transactions
                 * resolving the channel are likely still awaiting confirmation.
                */
                public final byte[] channel_id;
                /**
                 * The `user_channel_id` value passed in to [`ChannelManager::create_channel`], or 0 for
                 * an inbound channel. This will always be zero for objects serialized with LDK versions
                 * prior to 0.0.102.
                 * 
                 * [`ChannelManager::create_channel`]: crate::ln::channelmanager::ChannelManager::create_channel
                */
                public final long user_channel_id;
                /**
                 * The reason the channel was closed.
                */
                public final ClosureReason reason;
                private ChannelClosed(long ptr, bindings.LDKEvent.ChannelClosed obj) {
                        super(null, ptr);
                        this.channel_id = obj.channel_id;
                        this.user_channel_id = obj.user_channel_id;
                        long reason = obj.reason;
                        ClosureReason reason_hu_conv = ClosureReason.constr_from_ptr(reason);
                        reason_hu_conv.ptrs_to.add(this);
                        this.reason = reason_hu_conv;
                }
        }
        /**
         * Used to indicate to the user that they can abandon the funding transaction and recycle the
         * inputs for another purpose.
         */
        public final static class DiscardFunding extends Event {
                /**
                 * The channel_id of the channel which has been closed.
                */
                public final byte[] channel_id;
                /**
                 * The full transaction received from the user
                */
                public final byte[] transaction;
                private DiscardFunding(long ptr, bindings.LDKEvent.DiscardFunding obj) {
                        super(null, ptr);
                        this.channel_id = obj.channel_id;
                        this.transaction = obj.transaction;
                }
        }
        /**
         * Indicates that a path for an outbound payment was successful.
         * 
         * Always generated after [`Event::PaymentSent`] and thus useful for scoring channels. See
         * [`Event::PaymentSent`] for obtaining the payment preimage.
         */
        public final static class PaymentPathSuccessful extends Event {
                /**
                 * The id returned by [`ChannelManager::send_payment`] and used with
                 * [`ChannelManager::retry_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                 * [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
                */
                public final byte[] payment_id;
                /**
                 * The hash that was given to [`ChannelManager::send_payment`].
                 * 
                 * [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
                 * 
                 * Note that this (or a relevant inner pointer) may be NULL or all-0s to represent None
                */
                @Nullable public final byte[] payment_hash;
                /**
                 * The payment path that was successful.
                 * 
                 * May contain a closed channel if the HTLC sent along the path was fulfilled on chain.
                */
                public final RouteHop[] path;
                private PaymentPathSuccessful(long ptr, bindings.LDKEvent.PaymentPathSuccessful obj) {
                        super(null, ptr);
                        this.payment_id = obj.payment_id;
                        this.payment_hash = obj.payment_hash;
                        long[] path = obj.path;
                        int path_conv_10_len = path.length;
                        RouteHop[] path_conv_10_arr = new RouteHop[path_conv_10_len];
                        for (int k = 0; k < path_conv_10_len; k++) {
                                long path_conv_10 = path[k];
                                RouteHop path_conv_10_hu_conv = null; if (path_conv_10 < 0 || path_conv_10 > 4096) { path_conv_10_hu_conv = new RouteHop(null, path_conv_10); }
                                path_conv_10_hu_conv.ptrs_to.add(this);
                                path_conv_10_arr[k] = path_conv_10_hu_conv;
                        }
                        this.path = path_conv_10_arr;
                }
        }
        long clone_ptr() {
                long ret = bindings.Event_clone_ptr(this.ptr);
                Reference.reachabilityFence(this);
                return ret;
        }

        /**
         * Creates a copy of the Event
         */
        public Event clone() {
                long ret = bindings.Event_clone(this.ptr);
                Reference.reachabilityFence(this);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(this);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new FundingGenerationReady-variant Event
         */
        public static Event funding_generation_ready(byte[] temporary_channel_id, long channel_value_satoshis, byte[] output_script, long user_channel_id) {
                long ret = bindings.Event_funding_generation_ready(InternalUtils.check_arr_len(temporary_channel_id, 32), channel_value_satoshis, output_script, user_channel_id);
                Reference.reachabilityFence(temporary_channel_id);
                Reference.reachabilityFence(channel_value_satoshis);
                Reference.reachabilityFence(output_script);
                Reference.reachabilityFence(user_channel_id);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new PaymentReceived-variant Event
         */
        public static Event payment_received(byte[] payment_hash, long amt, PaymentPurpose purpose) {
                long ret = bindings.Event_payment_received(InternalUtils.check_arr_len(payment_hash, 32), amt, purpose.ptr);
                Reference.reachabilityFence(payment_hash);
                Reference.reachabilityFence(amt);
                Reference.reachabilityFence(purpose);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new PaymentSent-variant Event
         */
        public static Event payment_sent(byte[] payment_id, byte[] payment_preimage, byte[] payment_hash, Option_u64Z fee_paid_msat) {
                long ret = bindings.Event_payment_sent(InternalUtils.check_arr_len(payment_id, 32), InternalUtils.check_arr_len(payment_preimage, 32), InternalUtils.check_arr_len(payment_hash, 32), fee_paid_msat.ptr);
                Reference.reachabilityFence(payment_id);
                Reference.reachabilityFence(payment_preimage);
                Reference.reachabilityFence(payment_hash);
                Reference.reachabilityFence(fee_paid_msat);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new PaymentPathFailed-variant Event
         */
        public static Event payment_path_failed(byte[] payment_id, byte[] payment_hash, boolean rejected_by_dest, Option_NetworkUpdateZ network_update, boolean all_paths_failed, RouteHop[] path, Option_u64Z short_channel_id, RouteParameters retry) {
                long ret = bindings.Event_payment_path_failed(InternalUtils.check_arr_len(payment_id, 32), InternalUtils.check_arr_len(payment_hash, 32), rejected_by_dest, network_update.ptr, all_paths_failed, path != null ? Arrays.stream(path).mapToLong(path_conv_10 -> path_conv_10 == null ? 0 : path_conv_10.ptr & ~1).toArray() : null, short_channel_id.ptr, retry == null ? 0 : retry.ptr & ~1);
                Reference.reachabilityFence(payment_id);
                Reference.reachabilityFence(payment_hash);
                Reference.reachabilityFence(rejected_by_dest);
                Reference.reachabilityFence(network_update);
                Reference.reachabilityFence(all_paths_failed);
                Reference.reachabilityFence(path);
                Reference.reachabilityFence(short_channel_id);
                Reference.reachabilityFence(retry);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new PaymentFailed-variant Event
         */
        public static Event payment_failed(byte[] payment_id, byte[] payment_hash) {
                long ret = bindings.Event_payment_failed(InternalUtils.check_arr_len(payment_id, 32), InternalUtils.check_arr_len(payment_hash, 32));
                Reference.reachabilityFence(payment_id);
                Reference.reachabilityFence(payment_hash);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new PendingHTLCsForwardable-variant Event
         */
        public static Event pending_htlcs_forwardable(long time_forwardable) {
                long ret = bindings.Event_pending_htlcs_forwardable(time_forwardable);
                Reference.reachabilityFence(time_forwardable);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new SpendableOutputs-variant Event
         */
        public static Event spendable_outputs(SpendableOutputDescriptor[] outputs) {
                long ret = bindings.Event_spendable_outputs(outputs != null ? Arrays.stream(outputs).mapToLong(outputs_conv_27 -> outputs_conv_27.ptr).toArray() : null);
                Reference.reachabilityFence(outputs);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new PaymentForwarded-variant Event
         */
        public static Event payment_forwarded(Option_u64Z fee_earned_msat, boolean claim_from_onchain_tx) {
                long ret = bindings.Event_payment_forwarded(fee_earned_msat.ptr, claim_from_onchain_tx);
                Reference.reachabilityFence(fee_earned_msat);
                Reference.reachabilityFence(claim_from_onchain_tx);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new ChannelClosed-variant Event
         */
        public static Event channel_closed(byte[] channel_id, long user_channel_id, ClosureReason reason) {
                long ret = bindings.Event_channel_closed(InternalUtils.check_arr_len(channel_id, 32), user_channel_id, reason.ptr);
                Reference.reachabilityFence(channel_id);
                Reference.reachabilityFence(user_channel_id);
                Reference.reachabilityFence(reason);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new DiscardFunding-variant Event
         */
        public static Event discard_funding(byte[] channel_id, byte[] transaction) {
                long ret = bindings.Event_discard_funding(InternalUtils.check_arr_len(channel_id, 32), transaction);
                Reference.reachabilityFence(channel_id);
                Reference.reachabilityFence(transaction);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Utility method to constructs a new PaymentPathSuccessful-variant Event
         */
        public static Event payment_path_successful(byte[] payment_id, byte[] payment_hash, RouteHop[] path) {
                long ret = bindings.Event_payment_path_successful(InternalUtils.check_arr_len(payment_id, 32), InternalUtils.check_arr_len(payment_hash, 32), path != null ? Arrays.stream(path).mapToLong(path_conv_10 -> path_conv_10 == null ? 0 : path_conv_10.ptr & ~1).toArray() : null);
                Reference.reachabilityFence(payment_id);
                Reference.reachabilityFence(payment_hash);
                Reference.reachabilityFence(path);
                if (ret >= 0 && ret <= 4096) { return null; }
                Event ret_hu_conv = Event.constr_from_ptr(ret);
                ret_hu_conv.ptrs_to.add(ret_hu_conv);
                return ret_hu_conv;
        }

        /**
         * Serialize the Event object into a byte array which can be read by Event_read
         */
        public byte[] write() {
                byte[] ret = bindings.Event_write(this.ptr);
                Reference.reachabilityFence(this);
                return ret;
        }

}