1 package org.ldk.structs;
2 import org.ldk.impl.bindings;
3 import java.util.Arrays;
4 import javax.annotation.Nullable;
5 import org.ldk.enums.*;
7 public class UtilMethods {
9 * Creates a digital signature of a message given a SecretKey, like the node's secret.
10 * 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.
11 * Signatures are EC recoverable, meaning that given the message and the signature the PublicKey of the signer can be extracted.
13 public static Result_StringErrorZ sign(byte[] msg, byte[] sk) {
14 long ret = bindings.sign(msg, sk);
15 if (ret < 1024) { return null; }
16 Result_StringErrorZ ret_hu_conv = Result_StringErrorZ.constr_from_ptr(ret);
21 * Recovers the PublicKey of the signer of the message given the message and the signature.
23 public static Result_PublicKeyErrorZ recover_pk(byte[] msg, java.lang.String sig) {
24 long ret = bindings.recover_pk(msg, sig);
25 if (ret < 1024) { return null; }
26 Result_PublicKeyErrorZ ret_hu_conv = Result_PublicKeyErrorZ.constr_from_ptr(ret);
31 * Verifies a message was signed by a PrivateKey that derives to a given PublicKey, given a message, a signature,
34 public static boolean verify(byte[] msg, java.lang.String sig, byte[] pk) {
35 boolean ret = bindings.verify(msg, sig, pk);
40 * Read a C2Tuple_BlockHashChannelMonitorZ from a byte array, created by C2Tuple_BlockHashChannelMonitorZ_write
42 public static Result_C2Tuple_BlockHashChannelMonitorZDecodeErrorZ C2Tuple_BlockHashChannelMonitorZ_read(byte[] ser, KeysInterface arg) {
43 long ret = bindings.C2Tuple_BlockHashChannelMonitorZ_read(ser, arg == null ? 0 : arg.ptr);
44 if (ret < 1024) { return null; }
45 Result_C2Tuple_BlockHashChannelMonitorZDecodeErrorZ ret_hu_conv = Result_C2Tuple_BlockHashChannelMonitorZDecodeErrorZ.constr_from_ptr(ret);
46 ret_hu_conv.ptrs_to.add(arg);
51 * Read a C2Tuple_BlockHashChannelManagerZ from a byte array, created by C2Tuple_BlockHashChannelManagerZ_write
53 public static Result_C2Tuple_BlockHashChannelManagerZDecodeErrorZ C2Tuple_BlockHashChannelManagerZ_read(byte[] ser, KeysInterface arg_keys_manager, FeeEstimator arg_fee_estimator, Watch arg_chain_monitor, BroadcasterInterface arg_tx_broadcaster, Logger arg_logger, UserConfig arg_default_config, ChannelMonitor[] arg_channel_monitors) {
54 long ret = bindings.C2Tuple_BlockHashChannelManagerZ_read(ser, bindings.ChannelManagerReadArgs_new(arg_keys_manager == null ? 0 : arg_keys_manager.ptr, arg_fee_estimator == null ? 0 : arg_fee_estimator.ptr, arg_chain_monitor == null ? 0 : arg_chain_monitor.ptr, arg_tx_broadcaster == null ? 0 : arg_tx_broadcaster.ptr, arg_logger == null ? 0 : arg_logger.ptr, arg_default_config == null ? 0 : arg_default_config.ptr & ~1, arg_channel_monitors != null ? Arrays.stream(arg_channel_monitors).mapToLong(arg_channel_monitors_conv_16 -> arg_channel_monitors_conv_16 == null ? 0 : arg_channel_monitors_conv_16.ptr & ~1).toArray() : null));
55 if (ret < 1024) { return null; }
56 Result_C2Tuple_BlockHashChannelManagerZDecodeErrorZ ret_hu_conv = Result_C2Tuple_BlockHashChannelManagerZDecodeErrorZ.constr_from_ptr(ret);
57 ret_hu_conv.ptrs_to.add(arg_keys_manager);
58 ret_hu_conv.ptrs_to.add(arg_fee_estimator);
59 ret_hu_conv.ptrs_to.add(arg_chain_monitor);
60 ret_hu_conv.ptrs_to.add(arg_tx_broadcaster);
61 ret_hu_conv.ptrs_to.add(arg_logger);
62 ret_hu_conv.ptrs_to.add(arg_default_config);
63 for (ChannelMonitor arg_channel_monitors_conv_16: arg_channel_monitors) { ret_hu_conv.ptrs_to.add(arg_channel_monitors_conv_16); };
68 * Build the commitment secret from the seed and the commitment number
70 public static byte[] build_commitment_secret(byte[] commitment_seed, long idx) {
71 byte[] ret = bindings.build_commitment_secret(commitment_seed, idx);
76 * Build a closing transaction
78 public static byte[] build_closing_transaction(long to_holder_value_sat, long to_counterparty_value_sat, byte[] to_holder_script, byte[] to_counterparty_script, OutPoint funding_outpoint) {
79 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 & ~1);
80 // this.ptrs_to.add(funding_outpoint);
85 * Derives a per-commitment-transaction private key (eg an htlc key or delayed_payment key)
86 * from the base secret and the per_commitment_point.
88 * Note that this is infallible iff we trust that at least one of the two input keys are randomly
89 * generated (ie our own).
91 public static Result_SecretKeyErrorZ derive_private_key(byte[] per_commitment_point, byte[] base_secret) {
92 long ret = bindings.derive_private_key(per_commitment_point, base_secret);
93 if (ret < 1024) { return null; }
94 Result_SecretKeyErrorZ ret_hu_conv = Result_SecretKeyErrorZ.constr_from_ptr(ret);
99 * Derives a per-commitment-transaction public key (eg an htlc key or a delayed_payment key)
100 * from the base point and the per_commitment_key. This is the public equivalent of
101 * derive_private_key - using only public keys to derive a public key instead of private keys.
103 * Note that this is infallible iff we trust that at least one of the two input keys are randomly
104 * generated (ie our own).
106 public static Result_PublicKeyErrorZ derive_public_key(byte[] per_commitment_point, byte[] base_point) {
107 long ret = bindings.derive_public_key(per_commitment_point, base_point);
108 if (ret < 1024) { return null; }
109 Result_PublicKeyErrorZ ret_hu_conv = Result_PublicKeyErrorZ.constr_from_ptr(ret);
114 * Derives a per-commitment-transaction revocation key from its constituent parts.
116 * Only the cheating participant owns a valid witness to propagate a revoked
117 * commitment transaction, thus per_commitment_secret always come from cheater
118 * and revocation_base_secret always come from punisher, which is the broadcaster
119 * of the transaction spending with this key knowledge.
121 * Note that this is infallible iff we trust that at least one of the two input keys are randomly
122 * generated (ie our own).
124 public static Result_SecretKeyErrorZ derive_private_revocation_key(byte[] per_commitment_secret, byte[] countersignatory_revocation_base_secret) {
125 long ret = bindings.derive_private_revocation_key(per_commitment_secret, countersignatory_revocation_base_secret);
126 if (ret < 1024) { return null; }
127 Result_SecretKeyErrorZ ret_hu_conv = Result_SecretKeyErrorZ.constr_from_ptr(ret);
132 * Derives a per-commitment-transaction revocation public key from its constituent parts. This is
133 * the public equivalend of derive_private_revocation_key - using only public keys to derive a
134 * public key instead of private keys.
136 * Only the cheating participant owns a valid witness to propagate a revoked
137 * commitment transaction, thus per_commitment_point always come from cheater
138 * and revocation_base_point always come from punisher, which is the broadcaster
139 * of the transaction spending with this key knowledge.
141 * Note that this is infallible iff we trust that at least one of the two input keys are randomly
142 * generated (ie our own).
144 public static Result_PublicKeyErrorZ derive_public_revocation_key(byte[] per_commitment_point, byte[] countersignatory_revocation_base_point) {
145 long ret = bindings.derive_public_revocation_key(per_commitment_point, countersignatory_revocation_base_point);
146 if (ret < 1024) { return null; }
147 Result_PublicKeyErrorZ ret_hu_conv = Result_PublicKeyErrorZ.constr_from_ptr(ret);
152 * A script either spendable by the revocation
153 * key or the broadcaster_delayed_payment_key and satisfying the relative-locktime OP_CSV constrain.
154 * Encumbering a `to_holder` output on a commitment transaction or 2nd-stage HTLC transactions.
156 public static byte[] get_revokeable_redeemscript(byte[] revocation_key, short contest_delay, byte[] broadcaster_delayed_payment_key) {
157 byte[] ret = bindings.get_revokeable_redeemscript(revocation_key, contest_delay, broadcaster_delayed_payment_key);
162 * Gets the witness redeemscript for an HTLC output in a commitment transaction. Note that htlc
163 * does not need to have its previous_output_index filled.
165 public static byte[] get_htlc_redeemscript(HTLCOutputInCommitment htlc, TxCreationKeys keys) {
166 byte[] ret = bindings.get_htlc_redeemscript(htlc == null ? 0 : htlc.ptr & ~1, keys == null ? 0 : keys.ptr & ~1);
167 // this.ptrs_to.add(htlc);
168 // this.ptrs_to.add(keys);
173 * Gets the redeemscript for a funding output from the two funding public keys.
174 * Note that the order of funding public keys does not matter.
176 public static byte[] make_funding_redeemscript(byte[] broadcaster, byte[] countersignatory) {
177 byte[] ret = bindings.make_funding_redeemscript(broadcaster, countersignatory);
182 * Builds an unsigned HTLC-Success or HTLC-Timeout transaction from the given channel and HTLC
183 * parameters. This is used by [`TrustedCommitmentTransaction::get_htlc_sigs`] to fetch the
184 * transaction which needs signing, and can be used to construct an HTLC transaction which is
185 * broadcastable given a counterparty HTLC signature.
187 * Panics if htlc.transaction_output_index.is_none() (as such HTLCs do not appear in the
188 * commitment transaction).
190 public static byte[] build_htlc_transaction(byte[] commitment_txid, int feerate_per_kw, short contest_delay, HTLCOutputInCommitment htlc, byte[] broadcaster_delayed_payment_key, byte[] revocation_key) {
191 byte[] ret = bindings.build_htlc_transaction(commitment_txid, feerate_per_kw, contest_delay, htlc == null ? 0 : htlc.ptr & ~1, broadcaster_delayed_payment_key, revocation_key);
192 // this.ptrs_to.add(htlc);
197 * Commitment transaction numbers which appear in the transactions themselves are XOR'd with a
198 * shared secret first. This prevents on-chain observers from discovering how many commitment
199 * transactions occurred in a channel before it was closed.
201 * This function gets the shared secret from relevant channel public keys and can be used to
202 * \"decrypt\" the commitment transaction number given a commitment transaction on-chain.
204 public static long get_commitment_transaction_number_obscure_factor(byte[] broadcaster_payment_basepoint, byte[] countersignatory_payment_basepoint, boolean outbound_from_broadcaster) {
205 long ret = bindings.get_commitment_transaction_number_obscure_factor(broadcaster_payment_basepoint, countersignatory_payment_basepoint, outbound_from_broadcaster);
210 * Gets a keysend route from us (payer) to the given target node (payee). This is needed because
211 * keysend payments do not have an invoice from which to pull the payee's supported features, which
212 * makes it tricky to otherwise supply the `payee_features` parameter of `get_route`.
214 * Note that first_hops (or a relevant inner pointer) may be NULL or all-0s to represent None
216 public static Result_RouteLightningErrorZ get_keysend_route(byte[] our_node_id, NetworkGraph network, byte[] payee, @Nullable ChannelDetails[] first_hops, RouteHint[] last_hops, long final_value_msat, int final_cltv, Logger logger) {
217 long ret = bindings.get_keysend_route(our_node_id, network == null ? 0 : network.ptr & ~1, payee, first_hops != null ? Arrays.stream(first_hops).mapToLong(first_hops_conv_16 -> first_hops_conv_16 == null ? 0 : first_hops_conv_16.ptr & ~1).toArray() : null, last_hops != null ? Arrays.stream(last_hops).mapToLong(last_hops_conv_11 -> last_hops_conv_11 == null ? 0 : last_hops_conv_11.ptr & ~1).toArray() : null, final_value_msat, final_cltv, logger == null ? 0 : logger.ptr);
218 if (ret < 1024) { return null; }
219 Result_RouteLightningErrorZ ret_hu_conv = Result_RouteLightningErrorZ.constr_from_ptr(ret);
220 ret_hu_conv.ptrs_to.add(network);
221 for (ChannelDetails first_hops_conv_16: first_hops) { ret_hu_conv.ptrs_to.add(first_hops_conv_16); };
222 for (RouteHint last_hops_conv_11: last_hops) { ret_hu_conv.ptrs_to.add(last_hops_conv_11); };
223 ret_hu_conv.ptrs_to.add(logger);
228 * Gets a route from us (payer) to the given target node (payee).
230 * If the payee provided features in their invoice, they should be provided via payee_features.
231 * Without this, MPP will only be used if the payee's features are available in the network graph.
233 * Private routing paths between a public node and the target may be included in `last_hops`.
234 * Currently, only the last hop in each path is considered.
236 * If some channels aren't announced, it may be useful to fill in a first_hops with the
237 * results from a local ChannelManager::list_usable_channels() call. If it is filled in, our
238 * view of our local channels (from net_graph_msg_handler) will be ignored, and only those
239 * in first_hops will be used.
241 * Panics if first_hops contains channels without short_channel_ids
242 * (ChannelManager::list_usable_channels will never include such channels).
244 * The fees on channels from us to next-hops are ignored (as they are assumed to all be
245 * equal), however the enabled/disabled bit on such channels as well as the
246 * htlc_minimum_msat/htlc_maximum_msat *are* checked as they may change based on the receiving node.
248 * Note that payee_features (or a relevant inner pointer) may be NULL or all-0s to represent None
249 * Note that first_hops (or a relevant inner pointer) may be NULL or all-0s to represent None
251 public static Result_RouteLightningErrorZ get_route(byte[] our_node_id, NetworkGraph network, byte[] payee, @Nullable InvoiceFeatures payee_features, @Nullable ChannelDetails[] first_hops, RouteHint[] last_hops, long final_value_msat, int final_cltv, Logger logger) {
252 long ret = bindings.get_route(our_node_id, network == null ? 0 : network.ptr & ~1, payee, payee_features == null ? 0 : payee_features.ptr & ~1, first_hops != null ? Arrays.stream(first_hops).mapToLong(first_hops_conv_16 -> first_hops_conv_16 == null ? 0 : first_hops_conv_16.ptr & ~1).toArray() : null, last_hops != null ? Arrays.stream(last_hops).mapToLong(last_hops_conv_11 -> last_hops_conv_11 == null ? 0 : last_hops_conv_11.ptr & ~1).toArray() : null, final_value_msat, final_cltv, logger == null ? 0 : logger.ptr);
253 if (ret < 1024) { return null; }
254 Result_RouteLightningErrorZ ret_hu_conv = Result_RouteLightningErrorZ.constr_from_ptr(ret);
255 ret_hu_conv.ptrs_to.add(network);
256 ret_hu_conv.ptrs_to.add(payee_features);
257 for (ChannelDetails first_hops_conv_16: first_hops) { ret_hu_conv.ptrs_to.add(first_hops_conv_16); };
258 for (RouteHint last_hops_conv_11: last_hops) { ret_hu_conv.ptrs_to.add(last_hops_conv_11); };
259 ret_hu_conv.ptrs_to.add(logger);
264 * Writes the provided `ChannelManager` to the path provided at `FilesystemPersister`
265 * initialization, within a file called \"manager\".
267 public static Result_NoneErrorZ FilesystemPersister_persist_manager(java.lang.String data_dir, ChannelManager manager) {
268 long ret = bindings.FilesystemPersister_persist_manager(data_dir, manager == null ? 0 : manager.ptr & ~1);
269 if (ret < 1024) { return null; }
270 Result_NoneErrorZ ret_hu_conv = Result_NoneErrorZ.constr_from_ptr(ret);
271 ret_hu_conv.ptrs_to.add(manager);
276 * Utility to construct an invoice. Generally, unless you want to do something like a custom
277 * cltv_expiry, this is what you should be using to create an invoice. The reason being, this
278 * method stores the invoice's payment secret and preimage in `ChannelManager`, so (a) the user
279 * doesn't have to store preimage/payment secret information and (b) `ChannelManager` can verify
280 * that the payment secret is valid when the invoice is paid.
282 public static Result_InvoiceSignOrCreationErrorZ create_invoice_from_channelmanager(ChannelManager channelmanager, KeysInterface keys_manager, org.ldk.enums.Currency network, Option_u64Z amt_msat, java.lang.String description) {
283 long ret = bindings.create_invoice_from_channelmanager(channelmanager == null ? 0 : channelmanager.ptr & ~1, keys_manager == null ? 0 : keys_manager.ptr, network, amt_msat.ptr, description);
284 if (ret < 1024) { return null; }
285 Result_InvoiceSignOrCreationErrorZ ret_hu_conv = Result_InvoiceSignOrCreationErrorZ.constr_from_ptr(ret);
286 ret_hu_conv.ptrs_to.add(channelmanager);
287 ret_hu_conv.ptrs_to.add(keys_manager);