]> git.bitcoin.ninja Git - rust-lightning/blob - lightning-c-bindings/demo.cpp
Merge pull request #767 from TheBlueMatt/2020-12-chansigner-read-bindings
[rust-lightning] / lightning-c-bindings / demo.cpp
1 extern "C" {
2 #include "include/rust_types.h"
3 #include "include/lightning.h"
4 }
5 #include "include/lightningpp.hpp"
6
7 #include <assert.h>
8 #include <stdio.h>
9 #include <sys/socket.h>
10 #include <unistd.h>
11
12 #include <chrono>
13 #include <functional>
14 #include <thread>
15 #include <mutex>
16 #include <vector>
17
18 const uint8_t valid_node_announcement[] = {
19         0x94, 0xe4, 0xf5, 0x61, 0x41, 0x24, 0x7d, 0x90, 0x23, 0xa0, 0xc8, 0x34, 0x8c, 0xc4, 0xca, 0x51,
20         0xd8, 0x17, 0x59, 0xff, 0x7d, 0xac, 0x8c, 0x9b, 0x63, 0x29, 0x1c, 0xe6, 0x12, 0x12, 0x93, 0xbd,
21         0x66, 0x4d, 0x6b, 0x9c, 0xfb, 0x35, 0xda, 0x16, 0x06, 0x3d, 0xf0, 0x8f, 0x8a, 0x39, 0x99, 0xa2,
22         0xf2, 0x5d, 0x12, 0x0f, 0x2b, 0x42, 0x1b, 0x8b, 0x9a, 0xfe, 0x33, 0x0c, 0xeb, 0x33, 0x5e, 0x52,
23         0xee, 0x99, 0xa1, 0x07, 0x06, 0xed, 0xf8, 0x48, 0x7a, 0xc6, 0xe5, 0xf5, 0x5e, 0x01, 0x3a, 0x41,
24         0x2f, 0x18, 0x94, 0x8a, 0x3b, 0x0a, 0x52, 0x3f, 0xbf, 0x61, 0xa9, 0xc5, 0x4f, 0x70, 0xee, 0xb8,
25         0x79, 0x23, 0xbb, 0x1a, 0x44, 0x7d, 0x91, 0xe6, 0x2a, 0xbc, 0xa1, 0x07, 0xbc, 0x65, 0x3b, 0x02,
26         0xd9, 0x1d, 0xb2, 0xf2, 0x3a, 0xcb, 0x75, 0x79, 0xc6, 0x66, 0xd8, 0xc1, 0x71, 0x29, 0xdf, 0x04,
27         0x60, 0xf4, 0xbf, 0x07, 0x7b, 0xb9, 0xc2, 0x11, 0x94, 0x6a, 0x28, 0xc2, 0xdd, 0xd8, 0x7b, 0x44,
28         0x8f, 0x08, 0xe3, 0xc8, 0xd8, 0xf4, 0x81, 0xb0, 0x9f, 0x94, 0xcb, 0xc8, 0xc1, 0x3c, 0xc2, 0x6e,
29         0x31, 0x26, 0xfc, 0x33, 0x16, 0x3b, 0xe0, 0xde, 0xa1, 0x16, 0x21, 0x9f, 0x89, 0xdd, 0x97, 0xa4,
30         0x41, 0xf2, 0x9f, 0x19, 0xb1, 0xae, 0x82, 0xf7, 0x85, 0x9a, 0xb7, 0x8f, 0xb7, 0x52, 0x7a, 0x72,
31         0xf1, 0x5e, 0x89, 0xe1, 0x8a, 0xcd, 0x40, 0xb5, 0x8e, 0xc3, 0xca, 0x42, 0x76, 0xa3, 0x6e, 0x1b,
32         0xf4, 0x87, 0x35, 0x30, 0x58, 0x43, 0x04, 0xd9, 0x2c, 0x50, 0x54, 0x55, 0x47, 0x6f, 0x70, 0x9b,
33         0x42, 0x1f, 0x91, 0xfc, 0xa1, 0xdb, 0x72, 0x53, 0x96, 0xc8, 0xe5, 0xcd, 0x0e, 0xcb, 0xa0, 0xfe,
34         0x6b, 0x08, 0x77, 0x48, 0xb7, 0xad, 0x4a, 0x69, 0x7c, 0xdc, 0xd8, 0x04, 0x28, 0x35, 0x9b, 0x73,
35         0x00, 0x00, 0x43, 0x49, 0x7f, 0xd7, 0xf8, 0x26, 0x95, 0x71, 0x08, 0xf4, 0xa3, 0x0f, 0xd9, 0xce,
36         0xc3, 0xae, 0xba, 0x79, 0x97, 0x20, 0x84, 0xe9, 0x0e, 0xad, 0x01, 0xea, 0x33, 0x09, 0x00, 0x00,
37         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x5b, 0xe5, 0xe9, 0x47, 0x82,
38         0x09, 0x67, 0x4a, 0x96, 0xe6, 0x0f, 0x1f, 0x03, 0x7f, 0x61, 0x76, 0x54, 0x0f, 0xd0, 0x01, 0xfa,
39         0x1d, 0x64, 0x69, 0x47, 0x70, 0xc5, 0x6a, 0x77, 0x09, 0xc4, 0x2c, 0x03, 0x5c, 0x4e, 0x0d, 0xec,
40         0x72, 0x15, 0xe2, 0x68, 0x33, 0x93, 0x87, 0x30, 0xe5, 0xe5, 0x05, 0xaa, 0x62, 0x50, 0x4d, 0xa8,
41         0x5b, 0xa5, 0x71, 0x06, 0xa4, 0x6b, 0x5a, 0x24, 0x04, 0xfc, 0x9d, 0x8e, 0x02, 0xba, 0x72, 0xa6,
42         0xe8, 0xba, 0x53, 0xe8, 0xb9, 0x71, 0xad, 0x0c, 0x98, 0x23, 0x96, 0x8a, 0xef, 0x4d, 0x78, 0xce,
43         0x8a, 0xf2, 0x55, 0xab, 0x43, 0xdf, 0xf8, 0x30, 0x03, 0xc9, 0x02, 0xfb, 0x8d, 0x02, 0x16, 0x34,
44         0x5b, 0xf8, 0x31, 0x16, 0x4a, 0x03, 0x75, 0x8e, 0xae, 0xa5, 0xe8, 0xb6, 0x6f, 0xee, 0x2b, 0xe7,
45         0x71, 0x0b, 0x8f, 0x19, 0x0e, 0xe8, 0x80, 0x24, 0x90, 0x32, 0xa2, 0x9e, 0xd6, 0x6e
46 };
47
48 // A simple block containing only one transaction (which is the channel-open transaction for the
49 // channel we'll create). This was originally created by printing additional data in a simple
50 // rust-lightning unit test.
51 const uint8_t channel_open_header[80] = {
52         0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
53         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
54         0x00, 0x00, 0x00, 0x00, 0xa2, 0x47, 0xd2, 0xf8, 0xd4, 0xe0, 0x6a, 0x3f, 0xf9, 0x7a, 0x9a, 0x34,
55         0xbb, 0xa9, 0x96, 0xde, 0x63, 0x84, 0x5a, 0xce, 0xcf, 0x98, 0xb8, 0xbb, 0x75, 0x4c, 0x4f, 0x7d,
56         0xee, 0x4c, 0xa9, 0x5f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57 };
58
59 const uint8_t channel_open_tx[] = {
60         0x02, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
61         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
62         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
63         0x01, 0x40, 0x9c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x22, 0x00, 0x20, 0x20, 0x12, 0x70, 0x44,
64         0x41, 0x40, 0xaf, 0xc5, 0x72, 0x97, 0xc8, 0x69, 0xba, 0x04, 0xdb, 0x28, 0x7b, 0xd7, 0x32, 0x07,
65         0x33, 0x3a, 0x4a, 0xc2, 0xc5, 0x56, 0x06, 0x05, 0x65, 0xd7, 0xa8, 0xcf, 0x01, 0x00, 0x00, 0x00,
66         0x00, 0x00
67 };
68
69 // The first transaction in the block is header (80 bytes) + transaction count (1 byte) into the block data.
70 const uint8_t channel_open_txid[] = {
71         0x5f, 0xa9, 0x4c, 0xee, 0x7d, 0x4f, 0x4c, 0x75, 0xbb, 0xb8, 0x98, 0xcf, 0xce, 0x5a, 0x84, 0x63,
72         0xde, 0x96, 0xa9, 0xbb, 0x34, 0x9a, 0x7a, 0xf9, 0x3f, 0x6a, 0xe0, 0xd4, 0xf8, 0xd2, 0x47, 0xa2
73 };
74
75 // Two blocks built on top of channel_open_block:
76 const uint8_t header_1[80] = {
77         0x01, 0x00, 0x00, 0x00, 0x65, 0x8e, 0xf1, 0x90, 0x88, 0xfa, 0x13, 0x9c, 0x6a, 0xea, 0xf7, 0xc1,
78         0x5a, 0xdd, 0x52, 0x4d, 0x3c, 0x48, 0x03, 0xb3, 0x9b, 0x25, 0x4f, 0x02, 0x79, 0x05, 0x90, 0xe0,
79         0xc4, 0x8d, 0xa0, 0x62, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
80         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
81         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82 };
83 const uint8_t header_2[80] = {
84         0x01, 0x00, 0x00, 0x00, 0xf2, 0x08, 0x87, 0x51, 0xcb, 0xb1, 0x1a, 0x51, 0x76, 0x01, 0x6c, 0x5d,
85         0x76, 0x26, 0x54, 0x6f, 0xd9, 0xbd, 0xa6, 0xa5, 0xe9, 0x4b, 0x21, 0x6e, 0xda, 0xa3, 0x64, 0x23,
86         0xcd, 0xf1, 0xe2, 0xe2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
87         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
88         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
89 };
90
91 const LDKThirtyTwoBytes payment_preimage_1 = {
92         .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1 }
93 };
94 const LDKThirtyTwoBytes payment_hash_1 = {
95         .data = {
96                 0xdc, 0xb1, 0xac, 0x4a, 0x5d, 0xe3, 0x70, 0xca, 0xd0, 0x91, 0xc1, 0x3f, 0x13, 0xae, 0xe2, 0xf9,
97                 0x36, 0xc2, 0x78, 0xfa, 0x05, 0xd2, 0x64, 0x65, 0x3c, 0x0c, 0x13, 0x21, 0x85, 0x2a, 0x35, 0xe8
98         }
99 };
100
101 const LDKThirtyTwoBytes genesis_hash = { // We don't care particularly if this is "right"
102         .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1 }
103 };
104
105 void print_log(const void *this_arg, const char *record) {
106         printf("%p - %s\n", this_arg, record);
107 }
108
109 uint32_t get_fee(const void *this_arg, LDKConfirmationTarget target) {
110         if (target == LDKConfirmationTarget_Background) {
111                 return 253;
112         } else {
113                 return 507;
114         }
115         // Note that we don't call _free() on target, but that's OK, its unitary
116 }
117 // We use the same fee estimator globally:
118 const LDKFeeEstimator fee_est {
119         .this_arg = NULL,
120         .get_est_sat_per_1000_weight = get_fee,
121         .free = NULL,
122 };
123
124 static int num_txs_broadcasted = 0; // Technically a race, but ints are atomic on x86
125 void broadcast_tx(const void *this_arg, LDKTransaction tx) {
126         num_txs_broadcasted += 1;
127         //TODO
128         Transaction_free(tx);
129 }
130
131 struct NodeMonitors {
132         std::mutex mut;
133         std::vector<std::pair<LDK::OutPoint, LDK::ChannelMonitor>> mons;
134         LDKLogger* logger;
135
136         void ConnectBlock(const uint8_t (*header)[80], uint32_t height, LDKCVec_C2Tuple_usizeTransactionZZ tx_data, LDKBroadcasterInterface broadcast, LDKFeeEstimator fee_est) {
137                 std::unique_lock<std::mutex> l(mut);
138                 for (auto& mon : mons) {
139                         LDK::CVec_C2Tuple_TxidCVec_C2Tuple_u32TxOutZZZZ res = ChannelMonitor_block_connected(&mon.second, &header_2, tx_data, height, broadcast, fee_est, *logger);
140                 }
141         }
142 };
143
144 LDKCResult_NoneChannelMonitorUpdateErrZ add_channel_monitor(const void *this_arg, LDKOutPoint funding_txo_arg, LDKChannelMonitor monitor_arg) {
145         // First bind the args to C++ objects so they auto-free
146         LDK::ChannelMonitor mon(std::move(monitor_arg));
147         LDK::OutPoint funding_txo(std::move(funding_txo_arg));
148
149         NodeMonitors* arg = (NodeMonitors*) this_arg;
150         std::unique_lock<std::mutex> l(arg->mut);
151
152         arg->mons.push_back(std::make_pair(std::move(funding_txo), std::move(mon)));
153         return CResult_NoneChannelMonitorUpdateErrZ_ok();
154 }
155 static int mons_updated = 0; // Technically a race, but ints are atomic on x86.
156 LDKCResult_NoneChannelMonitorUpdateErrZ update_channel_monitor(const void *this_arg, LDKOutPoint funding_txo_arg, LDKChannelMonitorUpdate monitor_arg) {
157         // First bind the args to C++ objects so they auto-free
158         LDK::ChannelMonitorUpdate update(std::move(monitor_arg));
159         LDK::OutPoint funding_txo(std::move(funding_txo_arg));
160
161         NodeMonitors* arg = (NodeMonitors*) this_arg;
162         std::unique_lock<std::mutex> l(arg->mut);
163
164         bool updated = false;
165         for (auto& mon : arg->mons) {
166                 if (OutPoint_get_index(&mon.first) == OutPoint_get_index(&funding_txo) &&
167                                 !memcmp(OutPoint_get_txid(&mon.first), OutPoint_get_txid(&funding_txo), 32)) {
168                         updated = true;
169                         LDKBroadcasterInterface broadcaster = {
170                                 .broadcast_transaction = broadcast_tx,
171                         };
172                         LDK::CResult_NoneMonitorUpdateErrorZ res = ChannelMonitor_update_monitor(&mon.second, &update, &broadcaster, &fee_est, arg->logger);
173                         assert(res->result_ok);
174                 }
175         }
176         assert(updated);
177
178         mons_updated += 1;
179         return CResult_NoneChannelMonitorUpdateErrZ_ok();
180 }
181 LDKCVec_MonitorEventZ monitors_pending_monitor_events(const void *this_arg) {
182         NodeMonitors* arg = (NodeMonitors*) this_arg;
183         std::unique_lock<std::mutex> l(arg->mut);
184
185         if (arg->mons.size() == 0) {
186                 return LDKCVec_MonitorEventZ {
187                         .data = NULL,
188                         .datalen = 0,
189                 };
190         } else {
191                 // We only ever actually have one channel per node, plus concatenating two
192                 // Rust Vecs to each other from C++ will require a bit of effort.
193                 assert(arg->mons.size() == 1);
194                 return ChannelMonitor_get_and_clear_pending_monitor_events(&arg->mons[0].second);
195         }
196 }
197
198 uintptr_t sock_send_data(void *this_arg, LDKu8slice data, bool resume_read) {
199         return write((int)((long)this_arg), data.data, data.datalen);
200 }
201 void sock_disconnect_socket(void *this_arg) {
202         close((int)((long)this_arg));
203 }
204 bool sock_eq(const void *this_arg, const LDKSocketDescriptor *other_arg) {
205         return this_arg == other_arg->this_arg;
206 }
207 uint64_t sock_hash(const void *this_arg) {
208         return (uint64_t)this_arg;
209 }
210 void sock_read_data_thread(int rdfd, LDKSocketDescriptor *peer_descriptor, LDKPeerManager *pm) {
211         unsigned char buf[1024];
212         LDKu8slice data;
213         data.data = buf;
214         ssize_t readlen = 0;
215         while ((readlen = read(rdfd, buf, 1024)) > 0) {
216                 data.datalen = readlen;
217                 LDK::CResult_boolPeerHandleErrorZ res = PeerManager_read_event(&*pm, peer_descriptor, data);
218                 if (!res->result_ok) {
219                         peer_descriptor->disconnect_socket(peer_descriptor->this_arg);
220                         return;
221                 }
222                 PeerManager_process_events(pm);
223         }
224         PeerManager_socket_disconnected(&*pm, peer_descriptor);
225 }
226
227 int main() {
228         uint8_t node_seed[32];
229         memset(&node_seed, 0, 32);
230
231         LDKPublicKey null_pk;
232         memset(&null_pk, 0, sizeof(null_pk));
233
234         LDKNetwork network = LDKNetwork_Testnet;
235
236         // Trait implementations:
237         LDKBroadcasterInterface broadcast {
238                 .this_arg = NULL,
239                 .broadcast_transaction = broadcast_tx,
240                 .free = NULL,
241         };
242
243         // Instantiate classes for node 1:
244
245         LDKLogger logger1 {
246                 .this_arg = (void*)1,
247                 .log = print_log,
248                 .free = NULL,
249         };
250
251         NodeMonitors mons1;
252         mons1.logger = &logger1;
253         LDKWatch mon1 {
254                 .this_arg = &mons1,
255                 .watch_channel = add_channel_monitor,
256                 .update_channel = update_channel_monitor,
257                 .release_pending_monitor_events = monitors_pending_monitor_events,
258                 .free = NULL,
259         };
260
261         LDK::KeysManager keys1 = KeysManager_new(&node_seed, network, 0, 0);
262         LDK::KeysInterface keys_source1 = KeysManager_as_KeysInterface(&keys1);
263         LDKSecretKey node_secret1 = keys_source1->get_node_secret(keys_source1->this_arg);
264
265         LDK::UserConfig config1 = UserConfig_default();
266         LDK::ChannelManager cm1 = ChannelManager_new(network, fee_est, mon1, broadcast, logger1, KeysManager_as_KeysInterface(&keys1), config1, 0);
267
268         LDK::CVec_ChannelDetailsZ channels = ChannelManager_list_channels(&cm1);
269         assert(channels->datalen == 0);
270
271         LDK::NetGraphMsgHandler net_graph1 = NetGraphMsgHandler_new(genesis_hash, NULL, logger1);
272
273         LDK::MessageHandler msg_handler1 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm1), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph1));
274
275         LDKThirtyTwoBytes random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
276         LDK::PeerManager net1 = PeerManager_new(msg_handler1, node_secret1, &random_bytes.data, logger1);
277
278         // Demo getting a channel key and check that its returning real pubkeys:
279         LDK::ChannelKeys chan_keys1 = keys_source1->get_channel_keys(keys_source1->this_arg, false, 42);
280         chan_keys1->set_pubkeys(&chan_keys1); // Make sure pubkeys is defined
281         LDKPublicKey payment_point = ChannelPublicKeys_get_payment_point(&chan_keys1->pubkeys);
282         assert(memcmp(&payment_point, &null_pk, sizeof(null_pk)));
283
284         // Instantiate classes for node 2:
285
286         LDKLogger logger2 {
287                 .this_arg = (void*)2,
288                 .log = print_log,
289                 .free = NULL,
290         };
291
292         NodeMonitors mons2;
293         mons2.logger = &logger2;
294         LDKWatch mon2 {
295                 .this_arg = &mons2,
296                 .watch_channel = add_channel_monitor,
297                 .update_channel = update_channel_monitor,
298                 .release_pending_monitor_events = monitors_pending_monitor_events,
299                 .free = NULL,
300         };
301
302         memset(&node_seed, 1, 32);
303         LDK::KeysManager keys2 = KeysManager_new(&node_seed, network, 0, 0);
304         LDK::KeysInterface keys_source2 = KeysManager_as_KeysInterface(&keys2);
305         LDKSecretKey node_secret2 = keys_source2->get_node_secret(keys_source2->this_arg);
306
307         LDK::ChannelHandshakeConfig handshake_config2 = ChannelHandshakeConfig_default();
308         ChannelHandshakeConfig_set_minimum_depth(&handshake_config2, 2);
309         LDK::UserConfig config2 = UserConfig_default();
310         UserConfig_set_own_channel_config(&config2, handshake_config2);
311
312         LDK::ChannelManager cm2 = ChannelManager_new(network, fee_est, mon2, broadcast, logger2, KeysManager_as_KeysInterface(&keys2), config2, 0);
313
314         LDK::CVec_ChannelDetailsZ channels2 = ChannelManager_list_channels(&cm2);
315         assert(channels2->datalen == 0);
316
317         LDK::NetGraphMsgHandler net_graph2 = NetGraphMsgHandler_new(genesis_hash, NULL, logger2);
318         LDK::RoutingMessageHandler net_msgs2 = NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph2);
319         LDK::ChannelAnnouncement chan_ann = ChannelAnnouncement_read(LDKu8slice { .data = valid_node_announcement, .datalen = sizeof(valid_node_announcement) });
320         LDK::CResult_boolLightningErrorZ ann_res = net_msgs2->handle_channel_announcement(net_msgs2->this_arg, &chan_ann);
321         assert(ann_res->result_ok);
322
323         LDK::MessageHandler msg_handler2 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm2), net_msgs2);
324
325         LDKThirtyTwoBytes random_bytes2 = keys_source2->get_secure_random_bytes(keys_source2->this_arg);
326         LDK::PeerManager net2 = PeerManager_new(msg_handler2, node_secret2, &random_bytes2.data, logger2);
327
328         // Open a connection!
329         int pipefds_1_to_2[2];
330         int pipefds_2_to_1[2];
331         assert(!pipe(pipefds_1_to_2));
332         assert(!pipe(pipefds_2_to_1));
333
334         LDKSocketDescriptor sock1 {
335                 .this_arg = (void*)(long)pipefds_1_to_2[1],
336                 .send_data = sock_send_data,
337                 .disconnect_socket = sock_disconnect_socket,
338                 .eq = sock_eq,
339                 .hash = sock_hash,
340                 .clone = NULL,
341                 .free = NULL,
342         };
343
344         LDKSocketDescriptor sock2 {
345                 .this_arg = (void*)(long)pipefds_2_to_1[1],
346                 .send_data = sock_send_data,
347                 .disconnect_socket = sock_disconnect_socket,
348                 .eq = sock_eq,
349                 .hash = sock_hash,
350                 .clone = NULL,
351                 .free = NULL,
352         };
353
354         std::thread t1(&sock_read_data_thread, pipefds_2_to_1[0], &sock1, &net1);
355         std::thread t2(&sock_read_data_thread, pipefds_1_to_2[0], &sock2, &net2);
356
357         // Note that we have to bind the result to a C++ class to make sure it gets free'd
358         LDK::CResult_CVec_u8ZPeerHandleErrorZ con_res = PeerManager_new_outbound_connection(&net1, ChannelManager_get_our_node_id(&cm2), sock1);
359         assert(con_res->result_ok);
360         LDK::CResult_NonePeerHandleErrorZ con_res2 = PeerManager_new_inbound_connection(&net2, sock2);
361         assert(con_res2->result_ok);
362
363         auto writelen = write(pipefds_1_to_2[1], con_res->contents.result->data, con_res->contents.result->datalen);
364         assert(writelen > 0 && uint64_t(writelen) == con_res->contents.result->datalen);
365
366         while (true) {
367                 // Wait for the initial handshakes to complete...
368                 LDK::CVec_PublicKeyZ peers_1 = PeerManager_get_peer_node_ids(&net1);
369                 LDK::CVec_PublicKeyZ peers_2 = PeerManager_get_peer_node_ids(&net2);
370                 if (peers_1->datalen == 1 && peers_2->datalen ==1) { break; }
371                 std::this_thread::yield();
372         }
373
374         // Note that we have to bind the result to a C++ class to make sure it gets free'd
375         LDK::CResult_NoneAPIErrorZ res = ChannelManager_create_channel(&cm1, ChannelManager_get_our_node_id(&cm2), 40000, 1000, 42, config1);
376         assert(res->result_ok);
377         PeerManager_process_events(&net1);
378
379         LDK::CVec_ChannelDetailsZ new_channels = ChannelManager_list_channels(&cm1);
380         assert(new_channels->datalen == 1);
381         LDKPublicKey chan_open_pk = ChannelDetails_get_remote_network_id(&new_channels->data[0]);
382         assert(!memcmp(chan_open_pk.compressed_form, ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
383
384         while (true) {
385                 LDK::CVec_ChannelDetailsZ new_channels_2 = ChannelManager_list_channels(&cm2);
386                 if (new_channels_2->datalen == 1) {
387                         // Sample getting our counterparty's init features (which used to be hard to do without a memory leak):
388                         const LDK::InitFeatures init_feats = ChannelDetails_get_counterparty_features(&new_channels_2->data[0]);
389                         assert(init_feats->inner != NULL);
390                         break;
391                 }
392                 std::this_thread::yield();
393         }
394
395         LDKEventsProvider ev1 = ChannelManager_as_EventsProvider(&cm1);
396         while (true) {
397                 LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
398                 if (events->datalen == 1) {
399                         assert(events->data[0].tag == LDKEvent_FundingGenerationReady);
400                         assert(events->data[0].funding_generation_ready.user_channel_id == 42);
401                         assert(events->data[0].funding_generation_ready.channel_value_satoshis == 40000);
402                         assert(events->data[0].funding_generation_ready.output_script.datalen == 34);
403                         assert(!memcmp(events->data[0].funding_generation_ready.output_script.data, channel_open_tx + 58, 34));
404                         LDKThirtyTwoBytes txid;
405                         for (int i = 0; i < 32; i++) { txid.data[i] = channel_open_txid[31-i]; }
406                         LDK::OutPoint outp = OutPoint_new(txid, 0);
407                         ChannelManager_funding_transaction_generated(&cm1, &events->data[0].funding_generation_ready.temporary_channel_id.data, outp);
408                         break;
409                 }
410                 std::this_thread::yield();
411         }
412
413         // We observe when the funding signed messages have been exchanged by
414         // waiting for two monitors to be registered.
415         PeerManager_process_events(&net1);
416         while (true) {
417                 LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
418                 if (events->datalen == 1) {
419                         assert(events->data[0].tag == LDKEvent_FundingBroadcastSafe);
420                         assert(events->data[0].funding_broadcast_safe.user_channel_id == 42);
421                         break;
422                 }
423                 std::this_thread::yield();
424         }
425
426         LDKCVec_C2Tuple_usizeTransactionZZ txdata { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
427         *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
428         ChannelManager_block_connected(&cm1, &channel_open_header, txdata, 1);
429
430         txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
431         *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
432         ChannelManager_block_connected(&cm2, &channel_open_header, txdata, 1);
433
434         txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
435         *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
436         mons1.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
437
438         txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
439         *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
440         mons2.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
441
442         ChannelManager_block_connected(&cm1, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
443         ChannelManager_block_connected(&cm2, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
444         mons1.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
445         mons2.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
446
447         ChannelManager_block_connected(&cm1, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
448         ChannelManager_block_connected(&cm2, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
449         mons1.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
450         mons2.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
451
452         PeerManager_process_events(&net1);
453         PeerManager_process_events(&net2);
454
455         // Now send funds from 1 to 2!
456         while (true) {
457                 LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
458                 if (outbound_channels->datalen == 1) {
459                         const LDKChannelDetails *channel = &outbound_channels->data[0];
460                         // Note that the channel ID is the same as the channel txid reversed as the output index is 0
461                         uint8_t expected_chan_id[32];
462                         for (int i = 0; i < 32; i++) { expected_chan_id[i] = channel_open_txid[31-i]; }
463                         assert(!memcmp(ChannelDetails_get_channel_id(channel), expected_chan_id, 32));
464                         assert(!memcmp(ChannelDetails_get_remote_network_id(channel).compressed_form,
465                                         ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
466                         assert(ChannelDetails_get_channel_value_satoshis(channel) == 40000);
467                         // We opened the channel with 1000 push_msat:
468                         assert(ChannelDetails_get_outbound_capacity_msat(channel) == 40000*1000 - 1000);
469                         assert(ChannelDetails_get_inbound_capacity_msat(channel) == 1000);
470                         assert(ChannelDetails_get_is_live(channel));
471                         break;
472                 }
473                 std::this_thread::yield();
474         }
475
476         LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
477         LDKThirtyTwoBytes payment_secret;
478         memset(payment_secret.data, 0x42, 32);
479         {
480                 LDK::LockedNetworkGraph graph_2_locked = NetGraphMsgHandler_read_locked_graph(&net_graph2);
481                 LDK::NetworkGraph graph_2_ref = LockedNetworkGraph_graph(&graph_2_locked);
482                 LDK::CResult_RouteLightningErrorZ route = get_route(ChannelManager_get_our_node_id(&cm1), &graph_2_ref, ChannelManager_get_our_node_id(&cm2), &outbound_channels, LDKCVec_RouteHintZ {
483                                 .data = NULL, .datalen = 0
484                         }, 5000, 10, logger1);
485                 assert(route->result_ok);
486                 LDK::CResult_NonePaymentSendFailureZ send_res = ChannelManager_send_payment(&cm1, route->contents.result, payment_hash_1, payment_secret);
487                 assert(send_res->result_ok);
488         }
489
490         mons_updated = 0;
491         PeerManager_process_events(&net1);
492         while (mons_updated != 4) {
493                 std::this_thread::yield();
494         }
495
496         // Check that we received the payment!
497         LDKEventsProvider ev2 = ChannelManager_as_EventsProvider(&cm2);
498         while (true) {
499                 LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
500                 if (events->datalen == 1) {
501                         assert(events->data[0].tag == LDKEvent_PendingHTLCsForwardable);
502                         break;
503                 }
504                 std::this_thread::yield();
505         }
506         ChannelManager_process_pending_htlc_forwards(&cm2);
507         PeerManager_process_events(&net2);
508
509         mons_updated = 0;
510         {
511                 LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
512                 assert(events->datalen == 1);
513                 assert(events->data[0].tag == LDKEvent_PaymentReceived);
514                 assert(!memcmp(events->data[0].payment_received.payment_hash.data, payment_hash_1.data, 32));
515                 assert(!memcmp(events->data[0].payment_received.payment_secret.data, payment_secret.data, 32));
516                 assert(events->data[0].payment_received.amt == 5000);
517                 assert(ChannelManager_claim_funds(&cm2, payment_preimage_1, payment_secret, 5000));
518         }
519         PeerManager_process_events(&net2);
520         // Wait until we've passed through a full set of monitor updates (ie new preimage + CS/RAA messages)
521         while (mons_updated != 5) {
522                 std::this_thread::yield();
523         }
524         {
525                 LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
526                 assert(events->datalen == 1);
527                 assert(events->data[0].tag == LDKEvent_PaymentSent);
528                 assert(!memcmp(events->data[0].payment_sent.payment_preimage.data, payment_preimage_1.data, 32));
529         }
530
531         // Close the channel.
532         uint8_t chan_id[32];
533         for (int i = 0; i < 32; i++) { chan_id[i] = channel_open_txid[31-i]; }
534         LDK::CResult_NoneAPIErrorZ close_res = ChannelManager_close_channel(&cm1, &chan_id);
535         assert(close_res->result_ok);
536         PeerManager_process_events(&net1);
537         num_txs_broadcasted = 0;
538         while (num_txs_broadcasted != 2) {
539                 std::this_thread::yield();
540         }
541         LDK::CVec_ChannelDetailsZ chans_after_close1 = ChannelManager_list_channels(&cm1);
542         assert(chans_after_close1->datalen == 0);
543         LDK::CVec_ChannelDetailsZ chans_after_close2 = ChannelManager_list_channels(&cm2);
544         assert(chans_after_close2->datalen == 0);
545
546         close(pipefds_1_to_2[0]);
547         close(pipefds_2_to_1[0]);
548         close(pipefds_1_to_2[1]);
549         close(pipefds_2_to_1[1]);
550         t1.join();
551         t2.join();
552
553         // Few extra random tests:
554         LDKSecretKey sk;
555         memset(&sk, 42, 32);
556         LDKC2Tuple_u64u64Z kdiv_params;
557         kdiv_params.a = 42;
558         kdiv_params.b = 42;
559         LDK::InMemoryChannelKeys keys = InMemoryChannelKeys_new(sk, sk, sk, sk, sk, random_bytes, 42, kdiv_params);
560 }