3 import org.bitcoinj.core.*;
4 import org.bitcoinj.script.Script;
5 import org.junit.jupiter.api.Test;
6 import org.ldk.enums.Network;
7 import org.ldk.impl.bindings;
9 import java.util.ArrayList;
10 import java.util.Arrays;
11 import java.util.HashMap;
12 import java.util.concurrent.ConcurrentLinkedQueue;
14 public class PeerTest {
17 final long fee_estimator;
18 final long tx_broadcaster;
19 final long chain_monitor;
21 final long keys_interface;
23 final long chan_manager;
24 final long chan_manager_events;
25 final long chan_handler;
27 final long router_wrapper;
28 final long route_handler;
29 final long message_handler;
30 final long custom_message_handler;
31 final long peer_manager;
32 HashMap<String, Long> monitors; // Wow I forgot just how terrible Java is - we can't put a byte array here.
34 bindings.LDKFeeEstimator fee_est;
35 bindings.LDKBroadcasterInterface broad_trait;
36 bindings.LDKLogger log_trait;
37 bindings.LDKWatch watcher;
40 this.log_trait = (String arg)-> System.out.println(seed + ": " + arg);
41 logger = bindings.LDKLogger_new(this.log_trait);
42 this.fee_est = confirmation_target -> 0;
43 this.fee_estimator = bindings.LDKFeeEstimator_new(this.fee_est);
44 this.broad_trait = tx -> {
45 // We should broadcast
47 this.tx_broadcaster = bindings.LDKBroadcasterInterface_new(this.broad_trait);
48 this.monitors = new HashMap<>();
49 this.watcher = new bindings.LDKWatch() {
51 public long watch_channel(long funding_txo, long monitor) {
52 synchronized (monitors) {
53 assert monitors.put(Arrays.toString(bindings.OutPoint_get_txid(funding_txo)), monitor) == null;
55 bindings.OutPoint_free(funding_txo);
56 return bindings.CResult_NoneChannelMonitorUpdateErrZ_ok();
60 public long update_channel(long funding_txo, long update) {
61 synchronized (monitors) {
62 String txid = Arrays.toString(bindings.OutPoint_get_txid(funding_txo));
63 assert monitors.containsKey(txid);
64 long update_res = bindings.ChannelMonitor_update_monitor(monitors.get(txid), update, tx_broadcaster, fee_estimator, logger);
65 assert bindings.CResult_NoneMonitorUpdateErrorZ_is_ok(update_res);
66 bindings.CResult_NoneMonitorUpdateErrorZ_free(update_res);
68 bindings.OutPoint_free(funding_txo);
69 bindings.ChannelMonitorUpdate_free(update);
70 return bindings.CResult_NoneChannelMonitorUpdateErrZ_ok();
74 public long[] release_pending_monitor_events() {
75 synchronized (monitors) {
76 assert monitors.size() <= 1;
77 for (Long mon : monitors.values()) {
78 return bindings.ChannelMonitor_get_and_clear_pending_monitor_events(mon);
84 this.chain_monitor = bindings.LDKWatch_new(this.watcher);
86 byte[] key_seed = new byte[32];
87 for (byte i = 0; i < 32; i++) { key_seed[i] = (byte) (i ^ seed); }
88 this.keys = bindings.KeysManager_new(key_seed, System.currentTimeMillis() / 1000, (int)(System.currentTimeMillis() * 1000) & 0xffffffff);
89 this.keys_interface = bindings.KeysManager_as_KeysInterface(keys);
90 this.config = bindings.UserConfig_default();
91 long params = bindings.ChainParameters_new(Network.LDKNetwork_Bitcoin, bindings.BestBlock_new(new byte[32], 0));
92 this.chan_manager = bindings.ChannelManager_new(fee_estimator, chain_monitor, tx_broadcaster, logger, keys_interface, config, params);
93 this.node_id = bindings.ChannelManager_get_our_node_id(chan_manager);
94 this.chan_manager_events = bindings.ChannelManager_as_EventsProvider(chan_manager);
96 this.chan_handler = bindings.ChannelManager_as_ChannelMessageHandler(chan_manager);
97 this.router = bindings.NetworkGraph_new(new byte[32]);
98 this.router_wrapper = bindings.NetGraphMsgHandler_new(router, bindings.COption_AccessZ_none(), logger);
99 this.route_handler = bindings.NetGraphMsgHandler_as_RoutingMessageHandler(router_wrapper);
100 this.message_handler = bindings.MessageHandler_new(chan_handler, route_handler);
101 this.custom_message_handler = bindings.IgnoringMessageHandler_new();
103 byte[] random_data = new byte[32];
104 for (byte i = 0; i < 32; i++) { random_data[i] = (byte) ((i ^ seed) ^ 0xf0); }
105 this.peer_manager = bindings.PeerManager_new(message_handler, bindings.KeysInterface_get_node_secret(keys_interface), random_data,
106 logger, bindings.IgnoringMessageHandler_as_CustomMessageHandler(this.custom_message_handler));
109 void connect_block(Block b, Transaction t, int height) {
110 long listen = bindings.ChannelManager_as_Listen(chan_manager);
111 bindings.Listen_block_connected(listen, b.bitcoinSerialize(), height);
112 bindings.Listen_free(listen);
113 synchronized (monitors) {
114 for (Long mon : monitors.values()) {
117 txn = new long[]{bindings.C2Tuple_usizeTransactionZ_new(1, t.bitcoinSerialize())};
120 byte[] header = Arrays.copyOfRange(b.bitcoinSerialize(), 0, 80);
121 long[] ret = bindings.ChannelMonitor_block_connected(mon, header, txn, height, tx_broadcaster, fee_estimator, logger);
123 bindings.C2Tuple_TxidCVec_C2Tuple_u32TxOutZZZ_free(r);
130 // Note that we can't rely on finalizer order, so don't bother trying to rely on it here
131 bindings.Logger_free(logger);
132 bindings.FeeEstimator_free(fee_estimator);
133 bindings.BroadcasterInterface_free(tx_broadcaster);
134 bindings.Watch_free(chain_monitor);
135 bindings.KeysManager_free(keys);
136 bindings.KeysInterface_free(keys_interface);
137 bindings.UserConfig_free(config);
138 bindings.ChannelManager_free(chan_manager);
139 bindings.EventsProvider_free(chan_manager_events);
140 bindings.ChannelMessageHandler_free(chan_handler);
141 bindings.NetworkGraph_free(router);
142 bindings.NetGraphMsgHandler_free(router_wrapper);
143 bindings.RoutingMessageHandler_free(route_handler);
144 //MessageHandler was actually moved into the route_handler!: bindings.MessageHandler_free(message_handler);
145 bindings.PeerManager_free(peer_manager);
146 synchronized (monitors) {
147 for (Long mon : monitors.values()) {
148 bindings.ChannelMonitor_free(mon);
154 class LongHolder { long val; }
156 void do_read_event(ConcurrentLinkedQueue<Thread> list, long pm, long descriptor, byte[] arr) {
157 Thread thread = new Thread(() -> {
158 long res = bindings.PeerManager_read_event(pm, descriptor, arr);
159 assert bindings.CResult_boolPeerHandleErrorZ_is_ok(res);
160 //assert bindings.deref_bool(bindings.LDKCResult_boolPeerHandleErrorZ_get_inner(res));
161 bindings.CResult_boolPeerHandleErrorZ_free(res);
167 void deliver_peer_messages(ConcurrentLinkedQueue<Thread> list, long peer1, long peer2) throws InterruptedException {
168 bindings.PeerManager_process_events(peer1);
169 bindings.PeerManager_process_events(peer2);
170 while (!list.isEmpty()) {
172 bindings.PeerManager_process_events(peer1);
173 bindings.PeerManager_process_events(peer2);
178 void test_message_handler() throws InterruptedException {
179 Peer peer1 = new Peer((byte) 1);
180 Peer peer2 = new Peer((byte) 2);
182 ConcurrentLinkedQueue<Thread> list = new ConcurrentLinkedQueue<Thread>();
183 LongHolder descriptor1 = new LongHolder();
184 LongHolder descriptor1ref = descriptor1;
185 bindings.LDKSocketDescriptor sock1 = new bindings.LDKSocketDescriptor() {
187 public long send_data(byte[] data, boolean resume_read) {
188 do_read_event(list, peer1.peer_manager, descriptor1ref.val, data);
192 @Override public void disconnect_socket() { assert false; }
193 @Override public boolean eq(long other_arg) { boolean ret = bindings.SocketDescriptor_hash(other_arg) == 2; bindings.SocketDescriptor_free(other_arg); return ret; }
194 @Override public long hash() { return 2; }
196 long descriptor2 = bindings.LDKSocketDescriptor_new(sock1);
198 bindings.LDKSocketDescriptor sock2 = new bindings.LDKSocketDescriptor() {
200 public long send_data(byte[] data, boolean resume_read) {
201 do_read_event(list, peer2.peer_manager, descriptor2, data);
205 @Override public void disconnect_socket() { assert false; }
206 @Override public boolean eq(long other_arg) { boolean ret = bindings.SocketDescriptor_hash(other_arg) == 1; bindings.SocketDescriptor_free(other_arg); return ret; }
207 @Override public long hash() { return 1; }
209 descriptor1.val = bindings.LDKSocketDescriptor_new(sock2);
211 long init_vec = bindings.PeerManager_new_outbound_connection(peer1.peer_manager, peer2.node_id, descriptor1.val);
212 assert(bindings.CResult_CVec_u8ZPeerHandleErrorZ_is_ok(init_vec));
214 long con_res = bindings.PeerManager_new_inbound_connection(peer2.peer_manager, descriptor2);
215 assert(bindings.CResult_NonePeerHandleErrorZ_is_ok(con_res));
216 bindings.CResult_NonePeerHandleErrorZ_free(con_res);
217 do_read_event(list, peer2.peer_manager, descriptor2, bindings.LDKCResult_CVec_u8ZPeerHandleErrorZ_get_ok(init_vec));
218 bindings.CResult_CVec_u8ZPeerHandleErrorZ_free(init_vec);
220 deliver_peer_messages(list, peer1.peer_manager, peer2.peer_manager);
222 long cc_res = bindings.ChannelManager_create_channel(peer1.chan_manager, peer2.node_id, 10000, 1000, 42, 0);
223 assert bindings.CResult_NoneAPIErrorZ_is_ok(cc_res);
224 bindings.CResult_NoneAPIErrorZ_free(cc_res);
226 deliver_peer_messages(list, peer1.peer_manager, peer2.peer_manager);
228 ArrayList<Long> events = new ArrayList();
229 long handler = bindings.LDKEventHandler_new(events::add);
231 bindings.EventsProvider_process_pending_events(peer1.chan_manager_events, handler);
232 assert events.size() == 1;
233 bindings.LDKEvent event = bindings.LDKEvent_ref_from_ptr(events.get(0));
234 assert event instanceof bindings.LDKEvent.FundingGenerationReady;
235 assert ((bindings.LDKEvent.FundingGenerationReady)event).channel_value_satoshis == 10000;
236 assert ((bindings.LDKEvent.FundingGenerationReady)event).user_channel_id == 42;
237 byte[] funding_spk = ((bindings.LDKEvent.FundingGenerationReady)event).output_script;
238 assert funding_spk.length == 34 && funding_spk[0] == 0 && funding_spk[1] == 32; // P2WSH
239 byte[] chan_id = ((bindings.LDKEvent.FundingGenerationReady)event).temporary_channel_id;
240 bindings.Event_free(events.remove(0));
242 Transaction funding = new Transaction(NetworkParameters.fromID(NetworkParameters.ID_MAINNET));
243 funding.addInput(new TransactionInput(NetworkParameters.fromID(NetworkParameters.ID_MAINNET), funding, new byte[0]));
244 funding.getInputs().get(0).setWitness(new TransactionWitness(2)); // Make sure we don't complain about lack of witness
245 funding.getInput(0).getWitness().setPush(0, new byte[] {0x1});
246 funding.addOutput(Coin.SATOSHI.multiply(10000), new Script(funding_spk));
247 bindings.ChannelManager_funding_transaction_generated(peer1.chan_manager, chan_id, funding.bitcoinSerialize());
249 deliver_peer_messages(list, peer1.peer_manager, peer2.peer_manager);
251 Block b = new Block(NetworkParameters.fromID(NetworkParameters.ID_MAINNET), 2, Sha256Hash.ZERO_HASH, Sha256Hash.ZERO_HASH, 42, 0, 0, Arrays.asList(new Transaction[]{funding}));
252 peer1.connect_block(b, funding, 1);
253 peer2.connect_block(b, funding, 1);
255 for (int height = 2; height < 10; height++) {
256 b = new Block(NetworkParameters.fromID(NetworkParameters.ID_MAINNET), 2, b.getHash(), Sha256Hash.ZERO_HASH, 42, 0, 0, Arrays.asList(new Transaction[0]));
257 peer1.connect_block(b, null, height);
258 peer2.connect_block(b, null, height);
261 deliver_peer_messages(list, peer1.peer_manager, peer2.peer_manager);
263 long[] peer1_chans = bindings.ChannelManager_list_channels(peer1.chan_manager);
264 long[] peer2_chans = bindings.ChannelManager_list_channels(peer2.chan_manager);
265 assert peer1_chans.length == 1;
266 assert peer2_chans.length == 1;
267 assert bindings.ChannelDetails_get_channel_value_satoshis(peer1_chans[0]) == 10000;
268 assert bindings.ChannelDetails_get_is_usable(peer1_chans[0]);
269 assert Arrays.equals(bindings.ChannelDetails_get_channel_id(peer1_chans[0]), funding.getTxId().getReversedBytes());
270 assert Arrays.equals(bindings.ChannelDetails_get_channel_id(peer2_chans[0]), funding.getTxId().getReversedBytes());
271 for (long chan : peer2_chans) bindings.ChannelDetails_free(chan);
273 long no_min_val = bindings.COption_u64Z_none();
274 long inbound_payment = bindings.ChannelManager_create_inbound_payment(peer2.chan_manager, no_min_val, 7200, 42);
275 bindings.COption_u64Z_free(no_min_val);
276 long scorer = bindings.Scorer_default();
277 long scorer_interface = bindings.Scorer_as_Score(scorer);
279 long no_u64 = bindings.COption_u64Z_none();
280 long invoice_features = bindings.InvoiceFeatures_known();
281 long payee = bindings.Payee_new(peer2.node_id, invoice_features, new long[0], no_u64);
282 bindings.InvoiceFeatures_free(invoice_features);
283 bindings.COption_u64Z_free(no_u64);
284 long route_params = bindings.RouteParameters_new(payee, 1000, 42);
285 long route = bindings.find_route(peer1.node_id, route_params, peer1.router, peer1_chans,
286 peer1.logger, scorer_interface);
287 bindings.RouteParameters_free(route_params);
288 bindings.Payee_free(payee);
289 bindings.Score_free(scorer_interface);
290 bindings.Scorer_free(scorer);
292 for (long chan : peer1_chans) bindings.ChannelDetails_free(chan);
293 assert bindings.CResult_RouteLightningErrorZ_is_ok(route);
294 long payment_res = bindings.ChannelManager_send_payment(peer1.chan_manager, bindings.LDKCResult_RouteLightningErrorZ_get_ok(route),
295 bindings.C2Tuple_PaymentHashPaymentSecretZ_get_a(inbound_payment), bindings.C2Tuple_PaymentHashPaymentSecretZ_get_b(inbound_payment));
296 bindings.CResult_RouteLightningErrorZ_free(route);
297 bindings.C2Tuple_PaymentHashPaymentSecretZ_free(inbound_payment);
298 assert bindings.CResult_NonePaymentSendFailureZ_is_ok(payment_res);
299 bindings.CResult_NonePaymentSendFailureZ_free(payment_res);
301 deliver_peer_messages(list, peer1.peer_manager, peer2.peer_manager);
303 bindings.EventsProvider_process_pending_events(peer2.chan_manager_events, handler);
304 assert events.size() == 1;
305 bindings.LDKEvent forwardable = bindings.LDKEvent_ref_from_ptr(events.get(0));
306 assert forwardable instanceof bindings.LDKEvent.PendingHTLCsForwardable;
307 bindings.Event_free(events.remove(0));
308 bindings.ChannelManager_process_pending_htlc_forwards(peer2.chan_manager);
310 bindings.EventsProvider_process_pending_events(peer2.chan_manager_events, handler);
311 assert events.size() == 1;
312 bindings.LDKEvent payment_recvd = bindings.LDKEvent_ref_from_ptr(events.get(0));
313 assert payment_recvd instanceof bindings.LDKEvent.PaymentReceived;
314 bindings.LDKPaymentPurpose purpose = bindings.LDKPaymentPurpose_ref_from_ptr(((bindings.LDKEvent.PaymentReceived) payment_recvd).purpose);
315 assert purpose instanceof bindings.LDKPaymentPurpose.InvoicePayment;
316 assert bindings.ChannelManager_claim_funds(peer2.chan_manager, ((bindings.LDKPaymentPurpose.InvoicePayment) purpose).payment_preimage);
317 bindings.Event_free(events.remove(0));
319 deliver_peer_messages(list, peer1.peer_manager, peer2.peer_manager);
321 bindings.EventsProvider_process_pending_events(peer1.chan_manager_events, handler);
322 assert events.size() == 1;
323 bindings.LDKEvent sent = bindings.LDKEvent_ref_from_ptr(events.get(0));
324 assert sent instanceof bindings.LDKEvent.PaymentSent;
325 bindings.Event_free(events.remove(0));
327 bindings.EventHandler_free(handler);
331 bindings.SocketDescriptor_free(descriptor2);
332 bindings.SocketDescriptor_free(descriptor1.val);