1 package org.ldk.structs;
3 import org.ldk.impl.bindings;
4 import org.ldk.enums.*;
6 import java.util.Arrays;
7 import javax.annotation.Nullable;
10 * A trait to describe an object which can get user secrets and key material.
12 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
13 public class KeysInterface extends CommonBase {
14 final bindings.LDKKeysInterface bindings_instance;
15 KeysInterface(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }
16 private KeysInterface(bindings.LDKKeysInterface arg) {
17 super(bindings.LDKKeysInterface_new(arg));
18 this.ptrs_to.add(arg);
19 this.bindings_instance = arg;
21 @Override @SuppressWarnings("deprecation")
22 protected void finalize() throws Throwable {
23 if (ptr != 0) { bindings.KeysInterface_free(ptr); } super.finalize();
26 public static interface KeysInterfaceInterface {
28 * Get node secret key (aka node_id or network_key).
30 * This method must return the same value each time it is called.
32 byte[] get_node_secret();
34 * Get a script pubkey which we send funds to when claiming on-chain contestable outputs.
36 * This method should return a different value each time it is called, to avoid linking
37 * on-chain funds across channels as controlled to the same user.
39 byte[] get_destination_script();
41 * Get a script pubkey which we will send funds to when closing a channel.
43 * This method should return a different value each time it is called, to avoid linking
44 * on-chain funds across channels as controlled to the same user.
46 ShutdownScript get_shutdown_scriptpubkey();
48 * Get a new set of Sign for per-channel secrets. These MUST be unique even if you
49 * restarted with some stale data!
51 * This method must return a different value each time it is called.
53 Sign get_channel_signer(boolean inbound, long channel_value_satoshis);
55 * Gets a unique, cryptographically-secure, random 32 byte value. This is used for encrypting
56 * onion packets and for temporary channel IDs. There is no requirement that these be
57 * persisted anywhere, though they must be unique across restarts.
59 * This method must return a different value each time it is called.
61 byte[] get_secure_random_bytes();
63 * Reads a `Signer` for this `KeysInterface` from the given input stream.
64 * This is only called during deserialization of other objects which contain
65 * `Sign`-implementing objects (ie `ChannelMonitor`s and `ChannelManager`s).
66 * The bytes are exactly those which `<Self::Signer as Writeable>::write()` writes, and
67 * contain no versioning scheme. You may wish to include your own version prefix and ensure
68 * you've read all of the provided bytes to ensure no corruption occurred.
70 Result_SignDecodeErrorZ read_chan_signer(byte[] reader);
72 * Sign an invoice's preimage (note that this is the preimage of the invoice, not the HTLC's
73 * preimage). By parameterizing by the preimage instead of the hash, we allow implementors of
74 * this trait to parse the invoice and make sure they're signing what they expect, rather than
75 * blindly signing the hash.
77 Result_RecoverableSignatureNoneZ sign_invoice(byte[] invoice_preimage);
79 private static class LDKKeysInterfaceHolder { KeysInterface held; }
80 public static KeysInterface new_impl(KeysInterfaceInterface arg) {
81 final LDKKeysInterfaceHolder impl_holder = new LDKKeysInterfaceHolder();
82 impl_holder.held = new KeysInterface(new bindings.LDKKeysInterface() {
83 @Override public byte[] get_node_secret() {
84 byte[] ret = arg.get_node_secret();
85 byte[] result = InternalUtils.check_arr_len(ret, 32);
88 @Override public byte[] get_destination_script() {
89 byte[] ret = arg.get_destination_script();
92 @Override public long get_shutdown_scriptpubkey() {
93 ShutdownScript ret = arg.get_shutdown_scriptpubkey();
94 long result = ret == null ? 0 : ret.clone_ptr();
97 @Override public long get_channel_signer(boolean inbound, long channel_value_satoshis) {
98 Sign ret = arg.get_channel_signer(inbound, channel_value_satoshis);
99 long result = ret == null ? 0 : ret.clone_ptr();
100 impl_holder.held.ptrs_to.add(ret);
103 @Override public byte[] get_secure_random_bytes() {
104 byte[] ret = arg.get_secure_random_bytes();
105 byte[] result = InternalUtils.check_arr_len(ret, 32);
108 @Override public long read_chan_signer(byte[] reader) {
109 Result_SignDecodeErrorZ ret = arg.read_chan_signer(reader);
110 long result = ret == null ? 0 : ret.clone_ptr();
113 @Override public long sign_invoice(byte[] invoice_preimage) {
114 Result_RecoverableSignatureNoneZ ret = arg.sign_invoice(invoice_preimage);
115 long result = ret == null ? 0 : ret.clone_ptr();
119 return impl_holder.held;
122 * Get node secret key (aka node_id or network_key).
124 * This method must return the same value each time it is called.
126 public byte[] get_node_secret() {
127 byte[] ret = bindings.KeysInterface_get_node_secret(this.ptr);
132 * Get a script pubkey which we send funds to when claiming on-chain contestable outputs.
134 * This method should return a different value each time it is called, to avoid linking
135 * on-chain funds across channels as controlled to the same user.
137 public byte[] get_destination_script() {
138 byte[] ret = bindings.KeysInterface_get_destination_script(this.ptr);
143 * Get a script pubkey which we will send funds to when closing a channel.
145 * This method should return a different value each time it is called, to avoid linking
146 * on-chain funds across channels as controlled to the same user.
148 public ShutdownScript get_shutdown_scriptpubkey() {
149 long ret = bindings.KeysInterface_get_shutdown_scriptpubkey(this.ptr);
150 if (ret >= 0 && ret <= 4096) { return null; }
151 ShutdownScript ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new ShutdownScript(null, ret); }
152 ret_hu_conv.ptrs_to.add(this);
157 * Get a new set of Sign for per-channel secrets. These MUST be unique even if you
158 * restarted with some stale data!
160 * This method must return a different value each time it is called.
162 public Sign get_channel_signer(boolean inbound, long channel_value_satoshis) {
163 long ret = bindings.KeysInterface_get_channel_signer(this.ptr, inbound, channel_value_satoshis);
164 if (ret >= 0 && ret <= 4096) { return null; }
165 Sign ret_hu_conv = new Sign(null, ret);
166 ret_hu_conv.ptrs_to.add(this);
171 * Gets a unique, cryptographically-secure, random 32 byte value. This is used for encrypting
172 * onion packets and for temporary channel IDs. There is no requirement that these be
173 * persisted anywhere, though they must be unique across restarts.
175 * This method must return a different value each time it is called.
177 public byte[] get_secure_random_bytes() {
178 byte[] ret = bindings.KeysInterface_get_secure_random_bytes(this.ptr);
183 * Reads a `Signer` for this `KeysInterface` from the given input stream.
184 * This is only called during deserialization of other objects which contain
185 * `Sign`-implementing objects (ie `ChannelMonitor`s and `ChannelManager`s).
186 * The bytes are exactly those which `<Self::Signer as Writeable>::write()` writes, and
187 * contain no versioning scheme. You may wish to include your own version prefix and ensure
188 * you've read all of the provided bytes to ensure no corruption occurred.
190 public Result_SignDecodeErrorZ read_chan_signer(byte[] reader) {
191 long ret = bindings.KeysInterface_read_chan_signer(this.ptr, reader);
192 if (ret >= 0 && ret <= 4096) { return null; }
193 Result_SignDecodeErrorZ ret_hu_conv = Result_SignDecodeErrorZ.constr_from_ptr(ret);
198 * Sign an invoice's preimage (note that this is the preimage of the invoice, not the HTLC's
199 * preimage). By parameterizing by the preimage instead of the hash, we allow implementors of
200 * this trait to parse the invoice and make sure they're signing what they expect, rather than
201 * blindly signing the hash.
203 public Result_RecoverableSignatureNoneZ sign_invoice(byte[] invoice_preimage) {
204 long ret = bindings.KeysInterface_sign_invoice(this.ptr, invoice_preimage);
205 if (ret >= 0 && ret <= 4096) { return null; }
206 Result_RecoverableSignatureNoneZ ret_hu_conv = Result_RecoverableSignatureNoneZ.constr_from_ptr(ret);