Merge pull request #139 from TheBlueMatt/main

[ldk-java] / c_sharp / src / org / ldk / structs / UtilMethods.cs

using org.ldk.impl;
using org.ldk.enums;
using org.ldk.util;
using org.ldk.structs;
using System;

namespace org { namespace ldk { namespace util {
public class UtilMethods {
        /**
         * Gets the 128-bit integer, as 16 little-endian bytes
         */
        public static byte[] U128_le_bytes(org.ldk.util.UInt128 val) {
                byte[] ret = bindings.U128_le_bytes(val.getLEBytes());
                GC.KeepAlive(val);
                return ret;
        }

        /**
         * Constructs a new U128 from 16 little-endian bytes
         */
        public static UInt128 U128_new(byte[] le_bytes) {
                byte[] ret = bindings.U128_new(InternalUtils.check_arr_len(le_bytes, 16));
                GC.KeepAlive(le_bytes);
                org.ldk.util.UInt128 ret_conv = new org.ldk.util.UInt128(ret);
                return ret_conv;
        }

        /**
         * Constructs a new COption_NoneZ containing a
         */
        public static COption_NoneZ COption_NoneZ_some() {
                COption_NoneZ ret = bindings.COption_NoneZ_some();
                return ret;
        }

        /**
         * Constructs a new COption_NoneZ containing nothing
         */
        public static COption_NoneZ COption_NoneZ_none() {
                COption_NoneZ ret = bindings.COption_NoneZ_none();
                return ret;
        }

        /**
         * Read a APIError from a byte array, created by APIError_write
         */
        public static Result_COption_APIErrorZDecodeErrorZ APIError_read(byte[] ser) {
                long ret = bindings.APIError_read(ser);
                GC.KeepAlive(ser);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_COption_APIErrorZDecodeErrorZ ret_hu_conv = Result_COption_APIErrorZDecodeErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Creates a digital signature of a message given a SecretKey, like the node's secret.
         * A receiver knowing the PublicKey (e.g. the node's id) and the message can be sure that the signature was generated by the caller.
         * Signatures are EC recoverable, meaning that given the message and the signature the PublicKey of the signer can be extracted.
         */
        public static Result_StringErrorZ sign(byte[] msg, byte[] sk) {
                long ret = bindings.sign(msg, InternalUtils.check_arr_len(sk, 32));
                GC.KeepAlive(msg);
                GC.KeepAlive(sk);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_StringErrorZ ret_hu_conv = Result_StringErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Recovers the PublicKey of the signer of the message given the message and the signature.
         */
        public static Result_PublicKeyErrorZ recover_pk(byte[] msg, string sig) {
                long ret = bindings.recover_pk(msg, sig);
                GC.KeepAlive(msg);
                GC.KeepAlive(sig);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_PublicKeyErrorZ ret_hu_conv = Result_PublicKeyErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Verifies a message was signed by a PrivateKey that derives to a given PublicKey, given a message, a signature,
         * and the PublicKey.
         */
        public static bool verify(byte[] msg, string sig, byte[] pk) {
                bool ret = bindings.verify(msg, sig, InternalUtils.check_arr_len(pk, 33));
                GC.KeepAlive(msg);
                GC.KeepAlive(sig);
                GC.KeepAlive(pk);
                return ret;
        }

        /**
         * Construct the invoice's HRP and signatureless data into a preimage to be hashed.
         */
        public static byte[] construct_invoice_preimage(byte[] hrp_bytes, UInt5[] data_without_signature) {
                byte[] ret = bindings.construct_invoice_preimage(hrp_bytes, data_without_signature != null ? InternalUtils.convUInt5Array(data_without_signature) : null);
                GC.KeepAlive(hrp_bytes);
                GC.KeepAlive(data_without_signature);
                return ret;
        }

        /**
         * Read a MonitorEvent from a byte array, created by MonitorEvent_write
         */
        public static Result_COption_MonitorEventZDecodeErrorZ MonitorEvent_read(byte[] ser) {
                long ret = bindings.MonitorEvent_read(ser);
                GC.KeepAlive(ser);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_COption_MonitorEventZDecodeErrorZ ret_hu_conv = Result_COption_MonitorEventZDecodeErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Read a C2Tuple_BlockHashChannelMonitorZ from a byte array, created by C2Tuple_BlockHashChannelMonitorZ_write
         */
        public static Result_C2Tuple_BlockHashChannelMonitorZDecodeErrorZ C2Tuple_BlockHashChannelMonitorZ_read(byte[] ser, org.ldk.structs.EntropySource arg_a, org.ldk.structs.SignerProvider arg_b) {
                long ret = bindings.C2Tuple_BlockHashChannelMonitorZ_read(ser, arg_a.ptr, arg_b.ptr);
                GC.KeepAlive(ser);
                GC.KeepAlive(arg_a);
                GC.KeepAlive(arg_b);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_C2Tuple_BlockHashChannelMonitorZDecodeErrorZ ret_hu_conv = Result_C2Tuple_BlockHashChannelMonitorZDecodeErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_a); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_b); };
                return ret_hu_conv;
        }

        /**
         * Fetches the set of [`InitFeatures`] flags which are provided by or required by
         * [`ChannelManager`].
         */
        public static InitFeatures provided_init_features(org.ldk.structs.UserConfig config) {
                long ret = bindings.provided_init_features(config == null ? 0 : config.ptr);
                GC.KeepAlive(config);
                if (ret >= 0 && ret <= 4096) { return null; }
                org.ldk.structs.InitFeatures ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.InitFeatures(null, ret); }
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(ret_hu_conv); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(config); };
                return ret_hu_conv;
        }

        /**
         * Read a C2Tuple_BlockHashChannelManagerZ from a byte array, created by C2Tuple_BlockHashChannelManagerZ_write
         */
        public static Result_C2Tuple_BlockHashChannelManagerZDecodeErrorZ C2Tuple_BlockHashChannelManagerZ_read(byte[] ser, EntropySource arg_entropy_source, NodeSigner arg_node_signer, SignerProvider arg_signer_provider, FeeEstimator arg_fee_estimator, Watch arg_chain_monitor, BroadcasterInterface arg_tx_broadcaster, Router arg_router, Logger arg_logger, UserConfig arg_default_config, ChannelMonitor[] arg_channel_monitors) {
                long ret = bindings.C2Tuple_BlockHashChannelManagerZ_read(ser, bindings.ChannelManagerReadArgs_new(arg_entropy_source.ptr, arg_node_signer.ptr, arg_signer_provider.ptr, arg_fee_estimator.ptr, arg_chain_monitor.ptr, arg_tx_broadcaster.ptr, arg_router.ptr, arg_logger.ptr, arg_default_config == null ? 0 : arg_default_config.ptr, arg_channel_monitors != null ? InternalUtils.mapArray(arg_channel_monitors, arg_channel_monitors_conv_16 => arg_channel_monitors_conv_16 == null ? 0 : arg_channel_monitors_conv_16.ptr) : null));
                GC.KeepAlive(ser);
                GC.KeepAlive(arg_entropy_source);
                GC.KeepAlive(arg_node_signer);
                GC.KeepAlive(arg_signer_provider);
                GC.KeepAlive(arg_fee_estimator);
                GC.KeepAlive(arg_chain_monitor);
                GC.KeepAlive(arg_tx_broadcaster);
                GC.KeepAlive(arg_router);
                GC.KeepAlive(arg_logger);
                GC.KeepAlive(arg_default_config);
                GC.KeepAlive(arg_channel_monitors);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_C2Tuple_BlockHashChannelManagerZDecodeErrorZ ret_hu_conv = Result_C2Tuple_BlockHashChannelManagerZDecodeErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_entropy_source); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_signer_provider); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_fee_estimator); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_chain_monitor); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_tx_broadcaster); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_router); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_default_config); };
                foreach (ChannelMonitor arg_channel_monitors_conv_16 in arg_channel_monitors) { if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(arg_channel_monitors_conv_16); }; };
                return ret_hu_conv;
        }

        /**
         * Equivalent to [`crate::ln::channelmanager::ChannelManager::create_inbound_payment`], but no
         * `ChannelManager` is required. Useful for generating invoices for [phantom node payments] without
         * a `ChannelManager`.
         * 
         * `keys` is generated by calling [`NodeSigner::get_inbound_payment_key_material`] and then
         * calling [`ExpandedKey::new`] with its result. It is recommended to cache this value and not
         * regenerate it for each new inbound payment.
         * 
         * `current_time` is a Unix timestamp representing the current time.
         * 
         * Note that if `min_final_cltv_expiry_delta` is set to some value, then the payment will not be receivable
         * on versions of LDK prior to 0.0.114.
         * 
         * [phantom node payments]: crate::sign::PhantomKeysManager
         * [`NodeSigner::get_inbound_payment_key_material`]: crate::sign::NodeSigner::get_inbound_payment_key_material
         */
        public static Result_C2Tuple_PaymentHashPaymentSecretZNoneZ create(org.ldk.structs.ExpandedKey keys, org.ldk.structs.Option_u64Z min_value_msat, int invoice_expiry_delta_secs, org.ldk.structs.EntropySource entropy_source, long current_time, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta) {
                long ret = bindings.create(keys == null ? 0 : keys.ptr, min_value_msat.ptr, invoice_expiry_delta_secs, entropy_source.ptr, current_time, min_final_cltv_expiry_delta.ptr);
                GC.KeepAlive(keys);
                GC.KeepAlive(min_value_msat);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(entropy_source);
                GC.KeepAlive(current_time);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_C2Tuple_PaymentHashPaymentSecretZNoneZ ret_hu_conv = Result_C2Tuple_PaymentHashPaymentSecretZNoneZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(keys); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_value_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(entropy_source); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * Equivalent to [`crate::ln::channelmanager::ChannelManager::create_inbound_payment_for_hash`],
         * but no `ChannelManager` is required. Useful for generating invoices for [phantom node payments]
         * without a `ChannelManager`.
         * 
         * See [`create`] for information on the `keys` and `current_time` parameters.
         * 
         * Note that if `min_final_cltv_expiry_delta` is set to some value, then the payment will not be receivable
         * on versions of LDK prior to 0.0.114.
         * 
         * [phantom node payments]: crate::sign::PhantomKeysManager
         */
        public static Result_PaymentSecretNoneZ create_from_hash(org.ldk.structs.ExpandedKey keys, org.ldk.structs.Option_u64Z min_value_msat, byte[] payment_hash, int invoice_expiry_delta_secs, long current_time, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta) {
                long ret = bindings.create_from_hash(keys == null ? 0 : keys.ptr, min_value_msat.ptr, InternalUtils.check_arr_len(payment_hash, 32), invoice_expiry_delta_secs, current_time, min_final_cltv_expiry_delta.ptr);
                GC.KeepAlive(keys);
                GC.KeepAlive(min_value_msat);
                GC.KeepAlive(payment_hash);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(current_time);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_PaymentSecretNoneZ ret_hu_conv = Result_PaymentSecretNoneZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(keys); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_value_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * Gets the weight for an HTLC-Success transaction.
         */
        public static long htlc_success_tx_weight(org.ldk.structs.ChannelTypeFeatures channel_type_features) {
                long ret = bindings.htlc_success_tx_weight(channel_type_features == null ? 0 : channel_type_features.ptr);
                GC.KeepAlive(channel_type_features);
                return ret;
        }

        /**
         * Gets the weight for an HTLC-Timeout transaction.
         */
        public static long htlc_timeout_tx_weight(org.ldk.structs.ChannelTypeFeatures channel_type_features) {
                long ret = bindings.htlc_timeout_tx_weight(channel_type_features == null ? 0 : channel_type_features.ptr);
                GC.KeepAlive(channel_type_features);
                return ret;
        }

        /**
         * Check if a given input witness attempts to claim a HTLC.
         */
        public static Option_HTLCClaimZ HTLCClaim_from_witness(byte[] witness) {
                long ret = bindings.HTLCClaim_from_witness(witness);
                GC.KeepAlive(witness);
                if (ret >= 0 && ret <= 4096) { return null; }
                org.ldk.structs.Option_HTLCClaimZ ret_hu_conv = org.ldk.structs.Option_HTLCClaimZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(ret_hu_conv); };
                return ret_hu_conv;
        }

        /**
         * Build the commitment secret from the seed and the commitment number
         */
        public static byte[] build_commitment_secret(byte[] commitment_seed, long idx) {
                byte[] ret = bindings.build_commitment_secret(InternalUtils.check_arr_len(commitment_seed, 32), idx);
                GC.KeepAlive(commitment_seed);
                GC.KeepAlive(idx);
                return ret;
        }

        /**
         * Build a closing transaction
         */
        public static byte[] build_closing_transaction(long to_holder_value_sat, long to_counterparty_value_sat, byte[] to_holder_script, byte[] to_counterparty_script, org.ldk.structs.OutPoint funding_outpoint) {
                byte[] ret = bindings.build_closing_transaction(to_holder_value_sat, to_counterparty_value_sat, to_holder_script, to_counterparty_script, funding_outpoint == null ? 0 : funding_outpoint.ptr);
                GC.KeepAlive(to_holder_value_sat);
                GC.KeepAlive(to_counterparty_value_sat);
                GC.KeepAlive(to_holder_script);
                GC.KeepAlive(to_counterparty_script);
                GC.KeepAlive(funding_outpoint);
                return ret;
        }

        /**
         * Derives a per-commitment-transaction private key (eg an htlc key or delayed_payment key)
         * from the base secret and the per_commitment_point.
         */
        public static byte[] derive_private_key(byte[] per_commitment_point, byte[] base_secret) {
                byte[] ret = bindings.derive_private_key(InternalUtils.check_arr_len(per_commitment_point, 33), InternalUtils.check_arr_len(base_secret, 32));
                GC.KeepAlive(per_commitment_point);
                GC.KeepAlive(base_secret);
                return ret;
        }

        /**
         * Derives a per-commitment-transaction public key (eg an htlc key or a delayed_payment key)
         * from the base point and the per_commitment_key. This is the public equivalent of
         * derive_private_key - using only public keys to derive a public key instead of private keys.
         */
        public static byte[] derive_public_key(byte[] per_commitment_point, byte[] base_point) {
                byte[] ret = bindings.derive_public_key(InternalUtils.check_arr_len(per_commitment_point, 33), InternalUtils.check_arr_len(base_point, 33));
                GC.KeepAlive(per_commitment_point);
                GC.KeepAlive(base_point);
                return ret;
        }

        /**
         * Derives a per-commitment-transaction revocation key from its constituent parts.
         * 
         * Only the cheating participant owns a valid witness to propagate a revoked
         * commitment transaction, thus per_commitment_secret always come from cheater
         * and revocation_base_secret always come from punisher, which is the broadcaster
         * of the transaction spending with this key knowledge.
         */
        public static byte[] derive_private_revocation_key(byte[] per_commitment_secret, byte[] countersignatory_revocation_base_secret) {
                byte[] ret = bindings.derive_private_revocation_key(InternalUtils.check_arr_len(per_commitment_secret, 32), InternalUtils.check_arr_len(countersignatory_revocation_base_secret, 32));
                GC.KeepAlive(per_commitment_secret);
                GC.KeepAlive(countersignatory_revocation_base_secret);
                return ret;
        }

        /**
         * Derives a per-commitment-transaction revocation public key from its constituent parts. This is
         * the public equivalend of derive_private_revocation_key - using only public keys to derive a
         * public key instead of private keys.
         * 
         * Only the cheating participant owns a valid witness to propagate a revoked
         * commitment transaction, thus per_commitment_point always come from cheater
         * and revocation_base_point always come from punisher, which is the broadcaster
         * of the transaction spending with this key knowledge.
         * 
         * Note that this is infallible iff we trust that at least one of the two input keys are randomly
         * generated (ie our own).
         */
        public static byte[] derive_public_revocation_key(byte[] per_commitment_point, byte[] countersignatory_revocation_base_point) {
                byte[] ret = bindings.derive_public_revocation_key(InternalUtils.check_arr_len(per_commitment_point, 33), InternalUtils.check_arr_len(countersignatory_revocation_base_point, 33));
                GC.KeepAlive(per_commitment_point);
                GC.KeepAlive(countersignatory_revocation_base_point);
                return ret;
        }

        /**
         * A script either spendable by the revocation
         * key or the broadcaster_delayed_payment_key and satisfying the relative-locktime OP_CSV constrain.
         * Encumbering a `to_holder` output on a commitment transaction or 2nd-stage HTLC transactions.
         */
        public static byte[] get_revokeable_redeemscript(byte[] revocation_key, short contest_delay, byte[] broadcaster_delayed_payment_key) {
                byte[] ret = bindings.get_revokeable_redeemscript(InternalUtils.check_arr_len(revocation_key, 33), contest_delay, InternalUtils.check_arr_len(broadcaster_delayed_payment_key, 33));
                GC.KeepAlive(revocation_key);
                GC.KeepAlive(contest_delay);
                GC.KeepAlive(broadcaster_delayed_payment_key);
                return ret;
        }

        /**
         * Gets the witness redeemscript for an HTLC output in a commitment transaction. Note that htlc
         * does not need to have its previous_output_index filled.
         */
        public static byte[] get_htlc_redeemscript(org.ldk.structs.HTLCOutputInCommitment htlc, org.ldk.structs.ChannelTypeFeatures channel_type_features, org.ldk.structs.TxCreationKeys keys) {
                byte[] ret = bindings.get_htlc_redeemscript(htlc == null ? 0 : htlc.ptr, channel_type_features == null ? 0 : channel_type_features.ptr, keys == null ? 0 : keys.ptr);
                GC.KeepAlive(htlc);
                GC.KeepAlive(channel_type_features);
                GC.KeepAlive(keys);
                return ret;
        }

        /**
         * Gets the redeemscript for a funding output from the two funding public keys.
         * Note that the order of funding public keys does not matter.
         */
        public static byte[] make_funding_redeemscript(byte[] broadcaster, byte[] countersignatory) {
                byte[] ret = bindings.make_funding_redeemscript(InternalUtils.check_arr_len(broadcaster, 33), InternalUtils.check_arr_len(countersignatory, 33));
                GC.KeepAlive(broadcaster);
                GC.KeepAlive(countersignatory);
                return ret;
        }

        /**
         * Builds an unsigned HTLC-Success or HTLC-Timeout transaction from the given channel and HTLC
         * parameters. This is used by [`TrustedCommitmentTransaction::get_htlc_sigs`] to fetch the
         * transaction which needs signing, and can be used to construct an HTLC transaction which is
         * broadcastable given a counterparty HTLC signature.
         * 
         * Panics if htlc.transaction_output_index.is_none() (as such HTLCs do not appear in the
         * commitment transaction).
         */
        public static byte[] build_htlc_transaction(byte[] commitment_txid, int feerate_per_kw, short contest_delay, org.ldk.structs.HTLCOutputInCommitment htlc, org.ldk.structs.ChannelTypeFeatures channel_type_features, byte[] broadcaster_delayed_payment_key, byte[] revocation_key) {
                byte[] ret = bindings.build_htlc_transaction(InternalUtils.check_arr_len(commitment_txid, 32), feerate_per_kw, contest_delay, htlc == null ? 0 : htlc.ptr, channel_type_features == null ? 0 : channel_type_features.ptr, InternalUtils.check_arr_len(broadcaster_delayed_payment_key, 33), InternalUtils.check_arr_len(revocation_key, 33));
                GC.KeepAlive(commitment_txid);
                GC.KeepAlive(feerate_per_kw);
                GC.KeepAlive(contest_delay);
                GC.KeepAlive(htlc);
                GC.KeepAlive(channel_type_features);
                GC.KeepAlive(broadcaster_delayed_payment_key);
                GC.KeepAlive(revocation_key);
                return ret;
        }

        /**
         * Returns the witness required to satisfy and spend a HTLC input.
         */
        public static byte[] build_htlc_input_witness(byte[] local_sig, byte[] remote_sig, org.ldk.structs.Option_PaymentPreimageZ preimage, byte[] redeem_script, org.ldk.structs.ChannelTypeFeatures channel_type_features) {
                byte[] ret = bindings.build_htlc_input_witness(InternalUtils.check_arr_len(local_sig, 64), InternalUtils.check_arr_len(remote_sig, 64), preimage.ptr, redeem_script, channel_type_features == null ? 0 : channel_type_features.ptr);
                GC.KeepAlive(local_sig);
                GC.KeepAlive(remote_sig);
                GC.KeepAlive(preimage);
                GC.KeepAlive(redeem_script);
                GC.KeepAlive(channel_type_features);
                return ret;
        }

        /**
         * Gets the witnessScript for the to_remote output when anchors are enabled.
         */
        public static byte[] get_to_countersignatory_with_anchors_redeemscript(byte[] payment_point) {
                byte[] ret = bindings.get_to_countersignatory_with_anchors_redeemscript(InternalUtils.check_arr_len(payment_point, 33));
                GC.KeepAlive(payment_point);
                return ret;
        }

        /**
         * Gets the witnessScript for an anchor output from the funding public key.
         * The witness in the spending input must be:
         * <BIP 143 funding_signature>
         * After 16 blocks of confirmation, an alternative satisfying witness could be:
         * <>
         * (empty vector required to satisfy compliance with MINIMALIF-standard rule)
         */
        public static byte[] get_anchor_redeemscript(byte[] funding_pubkey) {
                byte[] ret = bindings.get_anchor_redeemscript(InternalUtils.check_arr_len(funding_pubkey, 33));
                GC.KeepAlive(funding_pubkey);
                return ret;
        }

        /**
         * Returns the witness required to satisfy and spend an anchor input.
         */
        public static byte[] build_anchor_input_witness(byte[] funding_key, byte[] funding_sig) {
                byte[] ret = bindings.build_anchor_input_witness(InternalUtils.check_arr_len(funding_key, 33), InternalUtils.check_arr_len(funding_sig, 64));
                GC.KeepAlive(funding_key);
                GC.KeepAlive(funding_sig);
                return ret;
        }

        /**
         * Commitment transaction numbers which appear in the transactions themselves are XOR'd with a
         * shared secret first. This prevents on-chain observers from discovering how many commitment
         * transactions occurred in a channel before it was closed.
         * 
         * This function gets the shared secret from relevant channel public keys and can be used to
         * \"decrypt\" the commitment transaction number given a commitment transaction on-chain.
         */
        public static long get_commitment_transaction_number_obscure_factor(byte[] broadcaster_payment_basepoint, byte[] countersignatory_payment_basepoint, bool outbound_from_broadcaster) {
                long ret = bindings.get_commitment_transaction_number_obscure_factor(InternalUtils.check_arr_len(broadcaster_payment_basepoint, 33), InternalUtils.check_arr_len(countersignatory_payment_basepoint, 33), outbound_from_broadcaster);
                GC.KeepAlive(broadcaster_payment_basepoint);
                GC.KeepAlive(countersignatory_payment_basepoint);
                GC.KeepAlive(outbound_from_broadcaster);
                return ret;
        }

        /**
         * Read a NetworkUpdate from a byte array, created by NetworkUpdate_write
         */
        public static Result_COption_NetworkUpdateZDecodeErrorZ NetworkUpdate_read(byte[] ser) {
                long ret = bindings.NetworkUpdate_read(ser);
                GC.KeepAlive(ser);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_COption_NetworkUpdateZDecodeErrorZ ret_hu_conv = Result_COption_NetworkUpdateZDecodeErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Verifies the signature of a [`NodeAnnouncement`].
         * 
         * Returns an error if it is invalid.
         */
        public static Result_NoneLightningErrorZ verify_node_announcement(org.ldk.structs.NodeAnnouncement msg) {
                long ret = bindings.verify_node_announcement(msg == null ? 0 : msg.ptr);
                GC.KeepAlive(msg);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_NoneLightningErrorZ ret_hu_conv = Result_NoneLightningErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(msg); };
                return ret_hu_conv;
        }

        /**
         * Verifies all signatures included in a [`ChannelAnnouncement`].
         * 
         * Returns an error if one of the signatures is invalid.
         */
        public static Result_NoneLightningErrorZ verify_channel_announcement(org.ldk.structs.ChannelAnnouncement msg) {
                long ret = bindings.verify_channel_announcement(msg == null ? 0 : msg.ptr);
                GC.KeepAlive(msg);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_NoneLightningErrorZ ret_hu_conv = Result_NoneLightningErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(msg); };
                return ret_hu_conv;
        }

        /**
         * Finds a route from us (payer) to the given target node (payee).
         * 
         * If the payee provided features in their invoice, they should be provided via the `payee` field
         * in the given [`RouteParameters::payment_params`].
         * Without this, MPP will only be used if the payee's features are available in the network graph.
         * 
         * Private routing paths between a public node and the target may be included in the `payee` field
         * of [`RouteParameters::payment_params`].
         * 
         * If some channels aren't announced, it may be useful to fill in `first_hops` with the results
         * from [`ChannelManager::list_usable_channels`]. If it is filled in, the view of these channels
         * from `network_graph` will be ignored, and only those in `first_hops` will be used.
         * 
         * The fees on channels from us to the next hop are ignored as they are assumed to all be equal.
         * However, the enabled/disabled bit on such channels as well as the `htlc_minimum_msat` /
         * `htlc_maximum_msat` *are* checked as they may change based on the receiving node.
         * 
         * # Panics
         * 
         * Panics if first_hops contains channels without `short_channel_id`s;
         * [`ChannelManager::list_usable_channels`] will never include such channels.
         * 
         * [`ChannelManager::list_usable_channels`]: crate::ln::channelmanager::ChannelManager::list_usable_channels
         * [`Event::PaymentPathFailed`]: crate::events::Event::PaymentPathFailed
         * [`NetworkGraph`]: crate::routing::gossip::NetworkGraph
         * 
         * Note that first_hops (or a relevant inner pointer) may be NULL or all-0s to represent None
         */
        public static Result_RouteLightningErrorZ find_route(byte[] our_node_pubkey, org.ldk.structs.RouteParameters route_params, org.ldk.structs.NetworkGraph network_graph, ChannelDetails[] first_hops, org.ldk.structs.Logger logger, org.ldk.structs.Score scorer, org.ldk.structs.ProbabilisticScoringFeeParameters score_params, byte[] random_seed_bytes) {
                long ret = bindings.find_route(InternalUtils.check_arr_len(our_node_pubkey, 33), route_params == null ? 0 : route_params.ptr, network_graph == null ? 0 : network_graph.ptr, first_hops != null ? InternalUtils.mapArray(first_hops, first_hops_conv_16 => first_hops_conv_16 == null ? 0 : first_hops_conv_16.ptr) : null, logger.ptr, scorer.ptr, score_params == null ? 0 : score_params.ptr, InternalUtils.check_arr_len(random_seed_bytes, 32));
                GC.KeepAlive(our_node_pubkey);
                GC.KeepAlive(route_params);
                GC.KeepAlive(network_graph);
                GC.KeepAlive(first_hops);
                GC.KeepAlive(logger);
                GC.KeepAlive(scorer);
                GC.KeepAlive(score_params);
                GC.KeepAlive(random_seed_bytes);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_RouteLightningErrorZ ret_hu_conv = Result_RouteLightningErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(route_params); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(network_graph); };
                if (first_hops != null) { foreach (ChannelDetails first_hops_conv_16 in first_hops) { if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(first_hops_conv_16); }; } };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(scorer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(score_params); };
                return ret_hu_conv;
        }

        /**
         * Construct a route from us (payer) to the target node (payee) via the given hops (which should
         * exclude the payer, but include the payee). This may be useful, e.g., for probing the chosen path.
         * 
         * Re-uses logic from `find_route`, so the restrictions described there also apply here.
         */
        public static Result_RouteLightningErrorZ build_route_from_hops(byte[] our_node_pubkey, byte[][] hops, org.ldk.structs.RouteParameters route_params, org.ldk.structs.NetworkGraph network_graph, org.ldk.structs.Logger logger, byte[] random_seed_bytes) {
                long ret = bindings.build_route_from_hops(InternalUtils.check_arr_len(our_node_pubkey, 33), hops != null ? InternalUtils.mapArray(hops, hops_conv_8 => InternalUtils.check_arr_len(hops_conv_8, 33)) : null, route_params == null ? 0 : route_params.ptr, network_graph == null ? 0 : network_graph.ptr, logger.ptr, InternalUtils.check_arr_len(random_seed_bytes, 32));
                GC.KeepAlive(our_node_pubkey);
                GC.KeepAlive(hops);
                GC.KeepAlive(route_params);
                GC.KeepAlive(network_graph);
                GC.KeepAlive(logger);
                GC.KeepAlive(random_seed_bytes);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_RouteLightningErrorZ ret_hu_conv = Result_RouteLightningErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(route_params); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(network_graph); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                return ret_hu_conv;
        }

        /**
         * Creates an unsigned [`PartiallySignedTransaction`] which spends the given descriptors to
         * the given outputs, plus an output to the given change destination (if sufficient
         * change value remains). The PSBT will have a feerate, at least, of the given value.
         * 
         * The `locktime` argument is used to set the transaction's locktime. If `None`, the
         * transaction will have a locktime of 0. It it recommended to set this to the current block
         * height to avoid fee sniping, unless you have some specific reason to use a different
         * locktime.
         * 
         * Returns the PSBT and expected max transaction weight.
         * 
         * Returns `Err(())` if the output value is greater than the input value minus required fee,
         * if a descriptor was duplicated, or if an output descriptor `script_pubkey`
         * does not match the one we can spend.
         * 
         * We do not enforce that outputs meet the dust limit or that any output scripts are standard.
         */
        public static Result_C2Tuple_PartiallySignedTransactionusizeZNoneZ SpendableOutputDescriptor_create_spendable_outputs_psbt(SpendableOutputDescriptor[] descriptors, TxOut[] outputs, byte[] change_destination_script, int feerate_sat_per_1000_weight, org.ldk.structs.Option_PackedLockTimeZ locktime) {
                long ret = bindings.SpendableOutputDescriptor_create_spendable_outputs_psbt(descriptors != null ? InternalUtils.mapArray(descriptors, descriptors_conv_27 => descriptors_conv_27.ptr) : null, outputs != null ? InternalUtils.mapArray(outputs, outputs_conv_7 => outputs_conv_7.ptr) : null, change_destination_script, feerate_sat_per_1000_weight, locktime.ptr);
                GC.KeepAlive(descriptors);
                GC.KeepAlive(outputs);
                GC.KeepAlive(change_destination_script);
                GC.KeepAlive(feerate_sat_per_1000_weight);
                GC.KeepAlive(locktime);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_C2Tuple_PartiallySignedTransactionusizeZNoneZ ret_hu_conv = Result_C2Tuple_PartiallySignedTransactionusizeZNoneZ.constr_from_ptr(ret);
                foreach (SpendableOutputDescriptor descriptors_conv_27 in descriptors) { if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(descriptors_conv_27); }; };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(locktime); };
                return ret_hu_conv;
        }

        /**
         * Returns whether `tlv_type` corresponds to a TLV record for Offers.
         */
        public static bool OffersMessage_is_known_type(long tlv_type) {
                bool ret = bindings.OffersMessage_is_known_type(tlv_type);
                GC.KeepAlive(tlv_type);
                return ret;
        }

        /**
         * Read a PathFailure from a byte array, created by PathFailure_write
         */
        public static Result_COption_PathFailureZDecodeErrorZ PathFailure_read(byte[] ser) {
                long ret = bindings.PathFailure_read(ser);
                GC.KeepAlive(ser);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_COption_PathFailureZDecodeErrorZ ret_hu_conv = Result_COption_PathFailureZDecodeErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Read a ClosureReason from a byte array, created by ClosureReason_write
         */
        public static Result_COption_ClosureReasonZDecodeErrorZ ClosureReason_read(byte[] ser) {
                long ret = bindings.ClosureReason_read(ser);
                GC.KeepAlive(ser);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_COption_ClosureReasonZDecodeErrorZ ret_hu_conv = Result_COption_ClosureReasonZDecodeErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Read a HTLCDestination from a byte array, created by HTLCDestination_write
         */
        public static Result_COption_HTLCDestinationZDecodeErrorZ HTLCDestination_read(byte[] ser) {
                long ret = bindings.HTLCDestination_read(ser);
                GC.KeepAlive(ser);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_COption_HTLCDestinationZDecodeErrorZ ret_hu_conv = Result_COption_HTLCDestinationZDecodeErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Read a Event from a byte array, created by Event_write
         */
        public static Result_COption_EventZDecodeErrorZ Event_read(byte[] ser) {
                long ret = bindings.Event_read(ser);
                GC.KeepAlive(ser);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_COption_EventZDecodeErrorZ ret_hu_conv = Result_COption_EventZDecodeErrorZ.constr_from_ptr(ret);
                return ret_hu_conv;
        }

        /**
         * Pays the given [`Bolt11Invoice`], retrying if needed based on [`Retry`].
         * 
         * [`Bolt11Invoice::payment_hash`] is used as the [`PaymentId`], which ensures idempotency as long
         * as the payment is still pending. If the payment succeeds, you must ensure that a second payment
         * with the same [`PaymentHash`] is never sent.
         * 
         * If you wish to use a different payment idempotency token, see [`pay_invoice_with_id`].
         */
        public static Result_PaymentIdPaymentErrorZ pay_invoice(org.ldk.structs.Bolt11Invoice invoice, org.ldk.structs.Retry retry_strategy, org.ldk.structs.ChannelManager channelmanager) {
                long ret = bindings.pay_invoice(invoice == null ? 0 : invoice.ptr, retry_strategy.ptr, channelmanager == null ? 0 : channelmanager.ptr);
                GC.KeepAlive(invoice);
                GC.KeepAlive(retry_strategy);
                GC.KeepAlive(channelmanager);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_PaymentIdPaymentErrorZ ret_hu_conv = Result_PaymentIdPaymentErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(invoice); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(retry_strategy); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                return ret_hu_conv;
        }

        /**
         * Pays the given [`Bolt11Invoice`] with a custom idempotency key, retrying if needed based on
         * [`Retry`].
         * 
         * Note that idempotency is only guaranteed as long as the payment is still pending. Once the
         * payment completes or fails, no idempotency guarantees are made.
         * 
         * You should ensure that the [`Bolt11Invoice::payment_hash`] is unique and the same
         * [`PaymentHash`] has never been paid before.
         * 
         * See [`pay_invoice`] for a variant which uses the [`PaymentHash`] for the idempotency token.
         */
        public static Result_NonePaymentErrorZ pay_invoice_with_id(org.ldk.structs.Bolt11Invoice invoice, byte[] payment_id, org.ldk.structs.Retry retry_strategy, org.ldk.structs.ChannelManager channelmanager) {
                long ret = bindings.pay_invoice_with_id(invoice == null ? 0 : invoice.ptr, InternalUtils.check_arr_len(payment_id, 32), retry_strategy.ptr, channelmanager == null ? 0 : channelmanager.ptr);
                GC.KeepAlive(invoice);
                GC.KeepAlive(payment_id);
                GC.KeepAlive(retry_strategy);
                GC.KeepAlive(channelmanager);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_NonePaymentErrorZ ret_hu_conv = Result_NonePaymentErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(invoice); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(retry_strategy); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                return ret_hu_conv;
        }

        /**
         * Pays the given zero-value [`Bolt11Invoice`] using the given amount, retrying if needed based on
         * [`Retry`].
         * 
         * [`Bolt11Invoice::payment_hash`] is used as the [`PaymentId`], which ensures idempotency as long
         * as the payment is still pending. If the payment succeeds, you must ensure that a second payment
         * with the same [`PaymentHash`] is never sent.
         * 
         * If you wish to use a different payment idempotency token, see
         * [`pay_zero_value_invoice_with_id`].
         */
        public static Result_PaymentIdPaymentErrorZ pay_zero_value_invoice(org.ldk.structs.Bolt11Invoice invoice, long amount_msats, org.ldk.structs.Retry retry_strategy, org.ldk.structs.ChannelManager channelmanager) {
                long ret = bindings.pay_zero_value_invoice(invoice == null ? 0 : invoice.ptr, amount_msats, retry_strategy.ptr, channelmanager == null ? 0 : channelmanager.ptr);
                GC.KeepAlive(invoice);
                GC.KeepAlive(amount_msats);
                GC.KeepAlive(retry_strategy);
                GC.KeepAlive(channelmanager);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_PaymentIdPaymentErrorZ ret_hu_conv = Result_PaymentIdPaymentErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(invoice); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(retry_strategy); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                return ret_hu_conv;
        }

        /**
         * Pays the given zero-value [`Bolt11Invoice`] using the given amount and custom idempotency key,
         * retrying if needed based on [`Retry`].
         * 
         * Note that idempotency is only guaranteed as long as the payment is still pending. Once the
         * payment completes or fails, no idempotency guarantees are made.
         * 
         * You should ensure that the [`Bolt11Invoice::payment_hash`] is unique and the same
         * [`PaymentHash`] has never been paid before.
         * 
         * See [`pay_zero_value_invoice`] for a variant which uses the [`PaymentHash`] for the
         * idempotency token.
         */
        public static Result_NonePaymentErrorZ pay_zero_value_invoice_with_id(org.ldk.structs.Bolt11Invoice invoice, long amount_msats, byte[] payment_id, org.ldk.structs.Retry retry_strategy, org.ldk.structs.ChannelManager channelmanager) {
                long ret = bindings.pay_zero_value_invoice_with_id(invoice == null ? 0 : invoice.ptr, amount_msats, InternalUtils.check_arr_len(payment_id, 32), retry_strategy.ptr, channelmanager == null ? 0 : channelmanager.ptr);
                GC.KeepAlive(invoice);
                GC.KeepAlive(amount_msats);
                GC.KeepAlive(payment_id);
                GC.KeepAlive(retry_strategy);
                GC.KeepAlive(channelmanager);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_NonePaymentErrorZ ret_hu_conv = Result_NonePaymentErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(invoice); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(retry_strategy); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                return ret_hu_conv;
        }

        /**
         * Utility to create an invoice that can be paid to one of multiple nodes, or a \"phantom invoice.\"
         * See [`PhantomKeysManager`] for more information on phantom node payments.
         * 
         * `phantom_route_hints` parameter:
         * Contains channel info for all nodes participating in the phantom invoice
         * Entries are retrieved from a call to [`ChannelManager::get_phantom_route_hints`] on each
         * participating node
         * It is fine to cache `phantom_route_hints` and reuse it across invoices, as long as the data is
         * updated when a channel becomes disabled or closes
         * Note that if too many channels are included in [`PhantomRouteHints::channels`], the invoice
         * may be too long for QR code scanning. To fix this, `PhantomRouteHints::channels` may be pared
         * down
         * 
         * `payment_hash` can be specified if you have a specific need for a custom payment hash (see the difference
         * between [`ChannelManager::create_inbound_payment`] and [`ChannelManager::create_inbound_payment_for_hash`]).
         * If `None` is provided for `payment_hash`, then one will be created.
         * 
         * `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
         * in excess of the current time.
         * 
         * `duration_since_epoch` is the current time since epoch in seconds.
         * 
         * You can specify a custom `min_final_cltv_expiry_delta`, or let LDK default it to
         * [`MIN_FINAL_CLTV_EXPIRY_DELTA`]. The provided expiry must be at least [`MIN_FINAL_CLTV_EXPIRY_DELTA`] - 3.
         * Note that LDK will add a buffer of 3 blocks to the delta to allow for up to a few new block
         * confirmations during routing.
         * 
         * Note that the provided `keys_manager`'s `NodeSigner` implementation must support phantom
         * invoices in its `sign_invoice` implementation ([`PhantomKeysManager`] satisfies this
         * requirement).
         * 
         * [`PhantomKeysManager`]: lightning::sign::PhantomKeysManager
         * [`ChannelManager::get_phantom_route_hints`]: lightning::ln::channelmanager::ChannelManager::get_phantom_route_hints
         * [`ChannelManager::create_inbound_payment`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment
         * [`ChannelManager::create_inbound_payment_for_hash`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment_for_hash
         * [`PhantomRouteHints::channels`]: lightning::ln::channelmanager::PhantomRouteHints::channels
         * [`MIN_FINAL_CLTV_EXPIRY_DETLA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
         * 
         * This can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
         * available and the current time is supplied by the caller.
         */
        public static Result_Bolt11InvoiceSignOrCreationErrorZ create_phantom_invoice(org.ldk.structs.Option_u64Z amt_msat, org.ldk.structs.Option_PaymentHashZ payment_hash, string description, int invoice_expiry_delta_secs, PhantomRouteHints[] phantom_route_hints, org.ldk.structs.EntropySource entropy_source, org.ldk.structs.NodeSigner node_signer, org.ldk.structs.Logger logger, Currency network, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta, long duration_since_epoch) {
                long ret = bindings.create_phantom_invoice(amt_msat.ptr, payment_hash.ptr, description, invoice_expiry_delta_secs, phantom_route_hints != null ? InternalUtils.mapArray(phantom_route_hints, phantom_route_hints_conv_19 => phantom_route_hints_conv_19 == null ? 0 : phantom_route_hints_conv_19.ptr) : null, entropy_source.ptr, node_signer.ptr, logger.ptr, network, min_final_cltv_expiry_delta.ptr, duration_since_epoch);
                GC.KeepAlive(amt_msat);
                GC.KeepAlive(payment_hash);
                GC.KeepAlive(description);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(phantom_route_hints);
                GC.KeepAlive(entropy_source);
                GC.KeepAlive(node_signer);
                GC.KeepAlive(logger);
                GC.KeepAlive(network);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                GC.KeepAlive(duration_since_epoch);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_Bolt11InvoiceSignOrCreationErrorZ ret_hu_conv = Result_Bolt11InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(amt_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(payment_hash); };
                foreach (PhantomRouteHints phantom_route_hints_conv_19 in phantom_route_hints) { if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(phantom_route_hints_conv_19); }; };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(entropy_source); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * Utility to create an invoice that can be paid to one of multiple nodes, or a \"phantom invoice.\"
         * See [`PhantomKeysManager`] for more information on phantom node payments.
         * 
         * `phantom_route_hints` parameter:
         * Contains channel info for all nodes participating in the phantom invoice
         * Entries are retrieved from a call to [`ChannelManager::get_phantom_route_hints`] on each
         * participating node
         * It is fine to cache `phantom_route_hints` and reuse it across invoices, as long as the data is
         * updated when a channel becomes disabled or closes
         * Note that the route hints generated from `phantom_route_hints` will be limited to a maximum
         * of 3 hints to ensure that the invoice can be scanned in a QR code. These hints are selected
         * in the order that the nodes in `PhantomRouteHints` are specified, selecting one hint per node
         * until the maximum is hit. Callers may provide as many `PhantomRouteHints::channels` as
         * desired, but note that some nodes will be trimmed if more than 3 nodes are provided.
         * 
         * `description_hash` is a SHA-256 hash of the description text
         * 
         * `payment_hash` can be specified if you have a specific need for a custom payment hash (see the difference
         * between [`ChannelManager::create_inbound_payment`] and [`ChannelManager::create_inbound_payment_for_hash`]).
         * If `None` is provided for `payment_hash`, then one will be created.
         * 
         * `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
         * in excess of the current time.
         * 
         * `duration_since_epoch` is the current time since epoch in seconds.
         * 
         * Note that the provided `keys_manager`'s `NodeSigner` implementation must support phantom
         * invoices in its `sign_invoice` implementation ([`PhantomKeysManager`] satisfies this
         * requirement).
         * 
         * [`PhantomKeysManager`]: lightning::sign::PhantomKeysManager
         * [`ChannelManager::get_phantom_route_hints`]: lightning::ln::channelmanager::ChannelManager::get_phantom_route_hints
         * [`ChannelManager::create_inbound_payment`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment
         * [`ChannelManager::create_inbound_payment_for_hash`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment_for_hash
         * [`PhantomRouteHints::channels`]: lightning::ln::channelmanager::PhantomRouteHints::channels
         * 
         * This can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
         * available and the current time is supplied by the caller.
         */
        public static Result_Bolt11InvoiceSignOrCreationErrorZ create_phantom_invoice_with_description_hash(org.ldk.structs.Option_u64Z amt_msat, org.ldk.structs.Option_PaymentHashZ payment_hash, int invoice_expiry_delta_secs, org.ldk.structs.Sha256 description_hash, PhantomRouteHints[] phantom_route_hints, org.ldk.structs.EntropySource entropy_source, org.ldk.structs.NodeSigner node_signer, org.ldk.structs.Logger logger, Currency network, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta, long duration_since_epoch) {
                long ret = bindings.create_phantom_invoice_with_description_hash(amt_msat.ptr, payment_hash.ptr, invoice_expiry_delta_secs, description_hash == null ? 0 : description_hash.ptr, phantom_route_hints != null ? InternalUtils.mapArray(phantom_route_hints, phantom_route_hints_conv_19 => phantom_route_hints_conv_19 == null ? 0 : phantom_route_hints_conv_19.ptr) : null, entropy_source.ptr, node_signer.ptr, logger.ptr, network, min_final_cltv_expiry_delta.ptr, duration_since_epoch);
                GC.KeepAlive(amt_msat);
                GC.KeepAlive(payment_hash);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(description_hash);
                GC.KeepAlive(phantom_route_hints);
                GC.KeepAlive(entropy_source);
                GC.KeepAlive(node_signer);
                GC.KeepAlive(logger);
                GC.KeepAlive(network);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                GC.KeepAlive(duration_since_epoch);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_Bolt11InvoiceSignOrCreationErrorZ ret_hu_conv = Result_Bolt11InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(amt_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(payment_hash); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(description_hash); };
                foreach (PhantomRouteHints phantom_route_hints_conv_19 in phantom_route_hints) { if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(phantom_route_hints_conv_19); }; };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(entropy_source); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * Utility to construct an invoice. Generally, unless you want to do something like a custom
         * cltv_expiry, this is what you should be using to create an invoice. The reason being, this
         * method stores the invoice's payment secret and preimage in `ChannelManager`, so (a) the user
         * doesn't have to store preimage/payment secret information and (b) `ChannelManager` can verify
         * that the payment secret is valid when the invoice is paid.
         * 
         * `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
         * in excess of the current time.
         * 
         * You can specify a custom `min_final_cltv_expiry_delta`, or let LDK default it to
         * [`MIN_FINAL_CLTV_EXPIRY_DELTA`]. The provided expiry must be at least [`MIN_FINAL_CLTV_EXPIRY_DELTA`].
         * Note that LDK will add a buffer of 3 blocks to the delta to allow for up to a few new block
         * confirmations during routing.
         * 
         * [`MIN_FINAL_CLTV_EXPIRY_DETLA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
         */
        public static Result_Bolt11InvoiceSignOrCreationErrorZ create_invoice_from_channelmanager(org.ldk.structs.ChannelManager channelmanager, org.ldk.structs.NodeSigner node_signer, org.ldk.structs.Logger logger, Currency network, org.ldk.structs.Option_u64Z amt_msat, string description, int invoice_expiry_delta_secs, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta) {
                long ret = bindings.create_invoice_from_channelmanager(channelmanager == null ? 0 : channelmanager.ptr, node_signer.ptr, logger.ptr, network, amt_msat.ptr, description, invoice_expiry_delta_secs, min_final_cltv_expiry_delta.ptr);
                GC.KeepAlive(channelmanager);
                GC.KeepAlive(node_signer);
                GC.KeepAlive(logger);
                GC.KeepAlive(network);
                GC.KeepAlive(amt_msat);
                GC.KeepAlive(description);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_Bolt11InvoiceSignOrCreationErrorZ ret_hu_conv = Result_Bolt11InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(amt_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * Utility to construct an invoice. Generally, unless you want to do something like a custom
         * cltv_expiry, this is what you should be using to create an invoice. The reason being, this
         * method stores the invoice's payment secret and preimage in `ChannelManager`, so (a) the user
         * doesn't have to store preimage/payment secret information and (b) `ChannelManager` can verify
         * that the payment secret is valid when the invoice is paid.
         * Use this variant if you want to pass the `description_hash` to the invoice.
         * 
         * `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
         * in excess of the current time.
         * 
         * You can specify a custom `min_final_cltv_expiry_delta`, or let LDK default it to
         * [`MIN_FINAL_CLTV_EXPIRY_DELTA`]. The provided expiry must be at least [`MIN_FINAL_CLTV_EXPIRY_DELTA`].
         * Note that LDK will add a buffer of 3 blocks to the delta to allow for up to a few new block
         * confirmations during routing.
         * 
         * [`MIN_FINAL_CLTV_EXPIRY_DETLA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
         */
        public static Result_Bolt11InvoiceSignOrCreationErrorZ create_invoice_from_channelmanager_with_description_hash(org.ldk.structs.ChannelManager channelmanager, org.ldk.structs.NodeSigner node_signer, org.ldk.structs.Logger logger, Currency network, org.ldk.structs.Option_u64Z amt_msat, org.ldk.structs.Sha256 description_hash, int invoice_expiry_delta_secs, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta) {
                long ret = bindings.create_invoice_from_channelmanager_with_description_hash(channelmanager == null ? 0 : channelmanager.ptr, node_signer.ptr, logger.ptr, network, amt_msat.ptr, description_hash == null ? 0 : description_hash.ptr, invoice_expiry_delta_secs, min_final_cltv_expiry_delta.ptr);
                GC.KeepAlive(channelmanager);
                GC.KeepAlive(node_signer);
                GC.KeepAlive(logger);
                GC.KeepAlive(network);
                GC.KeepAlive(amt_msat);
                GC.KeepAlive(description_hash);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_Bolt11InvoiceSignOrCreationErrorZ ret_hu_conv = Result_Bolt11InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(amt_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(description_hash); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * See [`create_invoice_from_channelmanager_with_description_hash`]
         * This version can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
         * available and the current time is supplied by the caller.
         */
        public static Result_Bolt11InvoiceSignOrCreationErrorZ create_invoice_from_channelmanager_with_description_hash_and_duration_since_epoch(org.ldk.structs.ChannelManager channelmanager, org.ldk.structs.NodeSigner node_signer, org.ldk.structs.Logger logger, Currency network, org.ldk.structs.Option_u64Z amt_msat, org.ldk.structs.Sha256 description_hash, long duration_since_epoch, int invoice_expiry_delta_secs, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta) {
                long ret = bindings.create_invoice_from_channelmanager_with_description_hash_and_duration_since_epoch(channelmanager == null ? 0 : channelmanager.ptr, node_signer.ptr, logger.ptr, network, amt_msat.ptr, description_hash == null ? 0 : description_hash.ptr, duration_since_epoch, invoice_expiry_delta_secs, min_final_cltv_expiry_delta.ptr);
                GC.KeepAlive(channelmanager);
                GC.KeepAlive(node_signer);
                GC.KeepAlive(logger);
                GC.KeepAlive(network);
                GC.KeepAlive(amt_msat);
                GC.KeepAlive(description_hash);
                GC.KeepAlive(duration_since_epoch);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_Bolt11InvoiceSignOrCreationErrorZ ret_hu_conv = Result_Bolt11InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(amt_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(description_hash); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * See [`create_invoice_from_channelmanager`]
         * This version can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
         * available and the current time is supplied by the caller.
         */
        public static Result_Bolt11InvoiceSignOrCreationErrorZ create_invoice_from_channelmanager_and_duration_since_epoch(org.ldk.structs.ChannelManager channelmanager, org.ldk.structs.NodeSigner node_signer, org.ldk.structs.Logger logger, Currency network, org.ldk.structs.Option_u64Z amt_msat, string description, long duration_since_epoch, int invoice_expiry_delta_secs, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta) {
                long ret = bindings.create_invoice_from_channelmanager_and_duration_since_epoch(channelmanager == null ? 0 : channelmanager.ptr, node_signer.ptr, logger.ptr, network, amt_msat.ptr, description, duration_since_epoch, invoice_expiry_delta_secs, min_final_cltv_expiry_delta.ptr);
                GC.KeepAlive(channelmanager);
                GC.KeepAlive(node_signer);
                GC.KeepAlive(logger);
                GC.KeepAlive(network);
                GC.KeepAlive(amt_msat);
                GC.KeepAlive(description);
                GC.KeepAlive(duration_since_epoch);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_Bolt11InvoiceSignOrCreationErrorZ ret_hu_conv = Result_Bolt11InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(amt_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

        /**
         * See [`create_invoice_from_channelmanager_and_duration_since_epoch`]
         * This version allows for providing a custom [`PaymentHash`] for the invoice.
         * This may be useful if you're building an on-chain swap or involving another protocol where
         * the payment hash is also involved outside the scope of lightning.
         */
        public static Result_Bolt11InvoiceSignOrCreationErrorZ create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash(org.ldk.structs.ChannelManager channelmanager, org.ldk.structs.NodeSigner node_signer, org.ldk.structs.Logger logger, Currency network, org.ldk.structs.Option_u64Z amt_msat, string description, long duration_since_epoch, int invoice_expiry_delta_secs, byte[] payment_hash, org.ldk.structs.Option_u16Z min_final_cltv_expiry_delta) {
                long ret = bindings.create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash(channelmanager == null ? 0 : channelmanager.ptr, node_signer.ptr, logger.ptr, network, amt_msat.ptr, description, duration_since_epoch, invoice_expiry_delta_secs, InternalUtils.check_arr_len(payment_hash, 32), min_final_cltv_expiry_delta.ptr);
                GC.KeepAlive(channelmanager);
                GC.KeepAlive(node_signer);
                GC.KeepAlive(logger);
                GC.KeepAlive(network);
                GC.KeepAlive(amt_msat);
                GC.KeepAlive(description);
                GC.KeepAlive(duration_since_epoch);
                GC.KeepAlive(invoice_expiry_delta_secs);
                GC.KeepAlive(payment_hash);
                GC.KeepAlive(min_final_cltv_expiry_delta);
                if (ret >= 0 && ret <= 4096) { return null; }
                Result_Bolt11InvoiceSignOrCreationErrorZ ret_hu_conv = Result_Bolt11InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(channelmanager); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(amt_msat); };
                if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(min_final_cltv_expiry_delta); };
                return ret_hu_conv;
        }

} } } }