_ Git - rust-lightning/blob - 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 void print_log(const void *this_arg, const char *record) {
 102         printf("%p - %s\n", this_arg, record);
 103 }
 104
 105 uint32_t get_fee(const void *this_arg, LDKConfirmationTarget target) {
 106         if (target == LDKConfirmationTarget_Background) {
 107                 return 253;
 108         } else {
 109                 return 507;
 110         }
 111         // Note that we don't call _free() on target, but that's OK, its unitary
 112 }
 113
 114 static int num_txs_broadcasted = 0; // Technically a race, but ints are atomic on x86
 115 void broadcast_tx(const void *this_arg, LDKTransaction tx) {
 116         num_txs_broadcasted += 1;
 117         //TODO
 118         Transaction_free(tx);
 119 }
 120
 121 struct NodeMonitors {
 122         std::mutex mut;
 123         std::vector<std::pair<LDK::OutPoint, LDK::ChannelMonitor>> mons;
 124         LDKLogger* logger;
 125
 126         void ConnectBlock(const uint8_t (*header)[80], uint32_t height, LDKCVec_C2Tuple_usizeTransactionZZ tx_data, LDKBroadcasterInterface broadcast, LDKFeeEstimator fee_est) {
 127                 std::unique_lock<std::mutex> l(mut);
 128                 for (auto& mon : mons) {
 129                         LDK::CVec_C2Tuple_TxidCVec_C2Tuple_u32TxOutZZZZ res = ChannelMonitor_block_connected(&mon.second, &header_2, tx_data, height, broadcast, fee_est, *logger);
 130                 }
 131         }
 132 };
 133
 134 LDKCResult_NoneChannelMonitorUpdateErrZ add_channel_monitor(const void *this_arg, LDKOutPoint funding_txo_arg, LDKChannelMonitor monitor_arg) {
 135         // First bind the args to C++ objects so they auto-free
 136         LDK::ChannelMonitor mon(std::move(monitor_arg));
 137         LDK::OutPoint funding_txo(std::move(funding_txo_arg));
 138
 139         NodeMonitors* arg = (NodeMonitors*) this_arg;
 140         std::unique_lock<std::mutex> l(arg->mut);
 141
 142         arg->mons.push_back(std::make_pair(std::move(funding_txo), std::move(mon)));
 143         return CResult_NoneChannelMonitorUpdateErrZ_ok();
 144 }
 145 static int mons_updated = 0; // Technically a race, but ints are atomic on x86.
 146 LDKCResult_NoneChannelMonitorUpdateErrZ update_channel_monitor(const void *this_arg, LDKOutPoint funding_txo_arg, LDKChannelMonitorUpdate monitor_arg) {
 147         // First bind the args to C++ objects so they auto-free
 148         LDK::ChannelMonitorUpdate update(std::move(monitor_arg));
 149         LDK::OutPoint funding_txo(std::move(funding_txo_arg));
 150
 151         NodeMonitors* arg = (NodeMonitors*) this_arg;
 152         std::unique_lock<std::mutex> l(arg->mut);
 153
 154         bool updated = false;
 155         for (auto& mon : arg->mons) {
 156                 if (OutPoint_get_index(&mon.first) == OutPoint_get_index(&funding_txo) &&
 157                                 !memcmp(OutPoint_get_txid(&mon.first), OutPoint_get_txid(&funding_txo), 32)) {
 158                         updated = true;
 159                         LDKBroadcasterInterface broadcaster = {
 160                                 .broadcast_transaction = broadcast_tx,
 161                         };
 162                         LDK::CResult_NoneMonitorUpdateErrorZ res = ChannelMonitor_update_monitor(&mon.second, &update, &broadcaster, arg->logger);
 163                         assert(res->result_ok);
 164                 }
 165         }
 166         assert(updated);
 167
 168         mons_updated += 1;
 169         return CResult_NoneChannelMonitorUpdateErrZ_ok();
 170 }
 171 LDKCVec_MonitorEventZ monitors_pending_monitor_events(const void *this_arg) {
 172         NodeMonitors* arg = (NodeMonitors*) this_arg;
 173         std::unique_lock<std::mutex> l(arg->mut);
 174
 175         if (arg->mons.size() == 0) {
 176                 return LDKCVec_MonitorEventZ {
 177                         .data = NULL,
 178                         .datalen = 0,
 179                 };
 180         } else {
 181                 // We only ever actually have one channel per node, plus concatenating two
 182                 // Rust Vecs to each other from C++ will require a bit of effort.
 183                 assert(arg->mons.size() == 1);
 184                 return ChannelMonitor_get_and_clear_pending_monitor_events(&arg->mons[0].second);
 185         }
 186 }
 187
 188 uintptr_t sock_send_data(void *this_arg, LDKu8slice data, bool resume_read) {
 189         return write((int)((long)this_arg), data.data, data.datalen);
 190 }
 191 void sock_disconnect_socket(void *this_arg) {
 192         close((int)((long)this_arg));
 193 }
 194 bool sock_eq(const void *this_arg, const void *other_arg) {
 195         return this_arg == other_arg;
 196 }
 197 uint64_t sock_hash(const void *this_arg) {
 198         return (uint64_t)this_arg;
 199 }
 200 void sock_read_data_thread(int rdfd, LDKSocketDescriptor *peer_descriptor, LDKPeerManager *pm) {
 201         unsigned char buf[1024];
 202         LDKu8slice data;
 203         data.data = buf;
 204         ssize_t readlen = 0;
 205         while ((readlen = read(rdfd, buf, 1024)) > 0) {
 206                 data.datalen = readlen;
 207                 LDK::CResult_boolPeerHandleErrorZ res = PeerManager_read_event(&*pm, peer_descriptor, data);
 208                 if (!res->result_ok) {
 209                         peer_descriptor->disconnect_socket(peer_descriptor->this_arg);
 210                         return;
 211                 }
 212                 PeerManager_process_events(pm);
 213         }
 214         PeerManager_socket_disconnected(&*pm, peer_descriptor);
 215 }
 216
 217 int main() {
 218         uint8_t node_seed[32];
 219         memset(&node_seed, 0, 32);
 220
 221         LDKPublicKey null_pk;
 222         memset(&null_pk, 0, sizeof(null_pk));
 223
 224         LDKNetwork network = LDKNetwork_Testnet;
 225
 226         // Trait implementations:
 227         LDKFeeEstimator fee_est {
 228                 .this_arg = NULL,
 229                 .get_est_sat_per_1000_weight = get_fee,
 230                 .free = NULL,
 231         };
 232
 233         LDKBroadcasterInterface broadcast {
 234                 .this_arg = NULL,
 235                 .broadcast_transaction = broadcast_tx,
 236                 .free = NULL,
 237         };
 238
 239         // Instantiate classes for node 1:
 240
 241         LDKLogger logger1 {
 242                 .this_arg = (void*)1,
 243                 .log = print_log,
 244                 .free = NULL,
 245         };
 246
 247         NodeMonitors mons1;
 248         mons1.logger = &logger1;
 249         LDKWatch mon1 {
 250                 .this_arg = &mons1,
 251                 .watch_channel = add_channel_monitor,
 252                 .update_channel = update_channel_monitor,
 253                 .release_pending_monitor_events = monitors_pending_monitor_events,
 254                 .free = NULL,
 255         };
 256
 257         LDK::KeysManager keys1 = KeysManager_new(&node_seed, network, 0, 0);
 258         LDK::KeysInterface keys_source1 = KeysManager_as_KeysInterface(&keys1);
 259         LDKSecretKey node_secret1 = keys_source1->get_node_secret(keys_source1->this_arg);
 260
 261         LDK::UserConfig config1 = UserConfig_default();
 262         LDK::ChannelManager cm1 = ChannelManager_new(network, fee_est, mon1, broadcast, logger1, KeysManager_as_KeysInterface(&keys1), config1, 0);
 263
 264         LDK::CVec_ChannelDetailsZ channels = ChannelManager_list_channels(&cm1);
 265         assert(channels->datalen == 0);
 266
 267         LDK::NetGraphMsgHandler net_graph1 = NetGraphMsgHandler_new(NULL, logger1);
 268
 269         LDK::MessageHandler msg_handler1 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm1), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph1));
 270
 271         LDKThirtyTwoBytes random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
 272         LDK::PeerManager net1 = PeerManager_new(msg_handler1, node_secret1, &random_bytes.data, logger1);
 273
 274         // Demo getting a channel key and check that its returning real pubkeys:
 275         LDK::ChannelKeys chan_keys1 = keys_source1->get_channel_keys(keys_source1->this_arg, false, 42);
 276         chan_keys1->set_pubkeys(&chan_keys1); // Make sure pubkeys is defined
 277         LDKPublicKey payment_point = ChannelPublicKeys_get_payment_point(&chan_keys1->pubkeys);
 278         assert(memcmp(&payment_point, &null_pk, sizeof(null_pk)));
 279
 280         // Instantiate classes for node 2:
 281
 282         LDKLogger logger2 {
 283                 .this_arg = (void*)2,
 284                 .log = print_log,
 285                 .free = NULL,
 286         };
 287
 288         NodeMonitors mons2;
 289         mons2.logger = &logger2;
 290         LDKWatch mon2 {
 291                 .this_arg = &mons2,
 292                 .watch_channel = add_channel_monitor,
 293                 .update_channel = update_channel_monitor,
 294                 .release_pending_monitor_events = monitors_pending_monitor_events,
 295                 .free = NULL,
 296         };
 297
 298         memset(&node_seed, 1, 32);
 299         LDK::KeysManager keys2 = KeysManager_new(&node_seed, network, 0, 0);
 300         LDK::KeysInterface keys_source2 = KeysManager_as_KeysInterface(&keys2);
 301         LDKSecretKey node_secret2 = keys_source2->get_node_secret(keys_source2->this_arg);
 302
 303         LDK::ChannelHandshakeConfig handshake_config2 = ChannelHandshakeConfig_default();
 304         ChannelHandshakeConfig_set_minimum_depth(&handshake_config2, 2);
 305         LDK::UserConfig config2 = UserConfig_default();
 306         UserConfig_set_own_channel_config(&config2, handshake_config2);
 307
 308         LDK::ChannelManager cm2 = ChannelManager_new(network, fee_est, mon2, broadcast, logger2, KeysManager_as_KeysInterface(&keys2), config2, 0);
 309
 310         LDK::CVec_ChannelDetailsZ channels2 = ChannelManager_list_channels(&cm2);
 311         assert(channels2->datalen == 0);
 312
 313         LDK::NetGraphMsgHandler net_graph2 = NetGraphMsgHandler_new(NULL, logger2);
 314         LDK::RoutingMessageHandler net_msgs2 = NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph2);
 315         LDK::ChannelAnnouncement chan_ann = ChannelAnnouncement_read(LDKu8slice { .data = valid_node_announcement, .datalen = sizeof(valid_node_announcement) });
 316         LDK::CResult_boolLightningErrorZ ann_res = net_msgs2->handle_channel_announcement(net_msgs2->this_arg, &chan_ann);
 317         assert(ann_res->result_ok);
 318
 319         LDK::MessageHandler msg_handler2 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm2), net_msgs2);
 320
 321         LDKThirtyTwoBytes random_bytes2 = keys_source2->get_secure_random_bytes(keys_source2->this_arg);
 322         LDK::PeerManager net2 = PeerManager_new(msg_handler2, node_secret2, &random_bytes2.data, logger2);
 323
 324         // Open a connection!
 325         int pipefds_1_to_2[2];
 326         int pipefds_2_to_1[2];
 327         assert(!pipe(pipefds_1_to_2));
 328         assert(!pipe(pipefds_2_to_1));
 329
 330         LDKSocketDescriptor sock1 {
 331                 .this_arg = (void*)(long)pipefds_1_to_2[1],
 332                 .send_data = sock_send_data,
 333                 .disconnect_socket = sock_disconnect_socket,
 334                 .eq = sock_eq,
 335                 .hash = sock_hash,
 336                 .clone = NULL,
 337                 .free = NULL,
 338         };
 339
 340         LDKSocketDescriptor sock2 {
 341                 .this_arg = (void*)(long)pipefds_2_to_1[1],
 342                 .send_data = sock_send_data,
 343                 .disconnect_socket = sock_disconnect_socket,
 344                 .eq = sock_eq,
 345                 .hash = sock_hash,
 346                 .clone = NULL,
 347                 .free = NULL,
 348         };
 349
 350         std::thread t1(&sock_read_data_thread, pipefds_2_to_1[0], &sock1, &net1);
 351         std::thread t2(&sock_read_data_thread, pipefds_1_to_2[0], &sock2, &net2);
 352
 353         // Note that we have to bind the result to a C++ class to make sure it gets free'd
 354         LDK::CResult_CVec_u8ZPeerHandleErrorZ con_res = PeerManager_new_outbound_connection(&net1, ChannelManager_get_our_node_id(&cm2), sock1);
 355         assert(con_res->result_ok);
 356         LDK::CResult_NonePeerHandleErrorZ con_res2 = PeerManager_new_inbound_connection(&net2, sock2);
 357         assert(con_res2->result_ok);
 358
 359         auto writelen = write(pipefds_1_to_2[1], con_res->contents.result->data, con_res->contents.result->datalen);
 360         assert(writelen > 0 && uint64_t(writelen) == con_res->contents.result->datalen);
 361
 362         while (true) {
 363                 // Wait for the initial handshakes to complete...
 364                 LDK::CVec_PublicKeyZ peers_1 = PeerManager_get_peer_node_ids(&net1);
 365                 LDK::CVec_PublicKeyZ peers_2 = PeerManager_get_peer_node_ids(&net2);
 366                 if (peers_1->datalen == 1 && peers_2->datalen ==1) { break; }
 367                 std::this_thread::yield();
 368         }
 369
 370         // Note that we have to bind the result to a C++ class to make sure it gets free'd
 371         LDK::CResult_NoneAPIErrorZ res = ChannelManager_create_channel(&cm1, ChannelManager_get_our_node_id(&cm2), 40000, 1000, 42, config1);
 372         assert(res->result_ok);
 373         PeerManager_process_events(&net1);
 374
 375         LDK::CVec_ChannelDetailsZ new_channels = ChannelManager_list_channels(&cm1);
 376         assert(new_channels->datalen == 1);
 377         LDKPublicKey chan_open_pk = ChannelDetails_get_remote_network_id(&new_channels->data[0]);
 378         assert(!memcmp(chan_open_pk.compressed_form, ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
 379
 380         while (true) {
 381                 LDK::CVec_ChannelDetailsZ new_channels_2 = ChannelManager_list_channels(&cm2);
 382                 if (new_channels_2->datalen == 1) {
 383                         // Sample getting our counterparty's init features (which used to be hard to do without a memory leak):
 384                         const LDK::InitFeatures init_feats = ChannelDetails_get_counterparty_features(&new_channels_2->data[0]);
 385                         assert(init_feats->inner != NULL);
 386                         break;
 387                 }
 388                 std::this_thread::yield();
 389         }
 390
 391         LDKEventsProvider ev1 = ChannelManager_as_EventsProvider(&cm1);
 392         while (true) {
 393                 LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
 394                 if (events->datalen == 1) {
 395                         assert(events->data[0].tag == LDKEvent_FundingGenerationReady);
 396                         assert(events->data[0].funding_generation_ready.user_channel_id == 42);
 397                         assert(events->data[0].funding_generation_ready.channel_value_satoshis == 40000);
 398                         assert(events->data[0].funding_generation_ready.output_script.datalen == 34);
 399                         assert(!memcmp(events->data[0].funding_generation_ready.output_script.data, channel_open_tx + 58, 34));
 400                         LDKThirtyTwoBytes txid;
 401                         for (int i = 0; i < 32; i++) { txid.data[i] = channel_open_txid[31-i]; }
 402                         LDK::OutPoint outp = OutPoint_new(txid, 0);
 403                         ChannelManager_funding_transaction_generated(&cm1, &events->data[0].funding_generation_ready.temporary_channel_id.data, outp);
 404                         break;
 405                 }
 406                 std::this_thread::yield();
 407         }
 408
 409         // We observe when the funding signed messages have been exchanged by
 410         // waiting for two monitors to be registered.
 411         PeerManager_process_events(&net1);
 412         while (true) {
 413                 LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
 414                 if (events->datalen == 1) {
 415                         assert(events->data[0].tag == LDKEvent_FundingBroadcastSafe);
 416                         assert(events->data[0].funding_broadcast_safe.user_channel_id == 42);
 417                         break;
 418                 }
 419                 std::this_thread::yield();
 420         }
 421
 422         LDKCVec_C2Tuple_usizeTransactionZZ txdata { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
 423         *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 424         ChannelManager_block_connected(&cm1, &channel_open_header, txdata, 1);
 425
 426         txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
 427         *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 428         ChannelManager_block_connected(&cm2, &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 = channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 432         mons1.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
 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 = channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 436         mons2.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
 437
 438         ChannelManager_block_connected(&cm1, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
 439         ChannelManager_block_connected(&cm2, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
 440         mons1.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 441         mons2.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 442
 443         ChannelManager_block_connected(&cm1, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
 444         ChannelManager_block_connected(&cm2, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
 445         mons1.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 446         mons2.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 447
 448         PeerManager_process_events(&net1);
 449         PeerManager_process_events(&net2);
 450
 451         // Now send funds from 1 to 2!
 452         while (true) {
 453                 LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
 454                 if (outbound_channels->datalen == 1) {
 455                         const LDKChannelDetails *channel = &outbound_channels->data[0];
 456                         // Note that the channel ID is the same as the channel txid reversed as the output index is 0
 457                         uint8_t expected_chan_id[32];
 458                         for (int i = 0; i < 32; i++) { expected_chan_id[i] = channel_open_txid[31-i]; }
 459                         assert(!memcmp(ChannelDetails_get_channel_id(channel), expected_chan_id, 32));
 460                         assert(!memcmp(ChannelDetails_get_remote_network_id(channel).compressed_form,
 461                                         ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
 462                         assert(ChannelDetails_get_channel_value_satoshis(channel) == 40000);
 463                         // We opened the channel with 1000 push_msat:
 464                         assert(ChannelDetails_get_outbound_capacity_msat(channel) == 40000*1000 - 1000);
 465                         assert(ChannelDetails_get_inbound_capacity_msat(channel) == 1000);
 466                         assert(ChannelDetails_get_is_live(channel));
 467                         break;
 468                 }
 469                 std::this_thread::yield();
 470         }
 471
 472         LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
 473         LDKThirtyTwoBytes payment_secret;
 474         memset(payment_secret.data, 0x42, 32);
 475         {
 476                 LDK::LockedNetworkGraph graph_2_locked = NetGraphMsgHandler_read_locked_graph(&net_graph2);
 477                 LDK::NetworkGraph graph_2_ref = LockedNetworkGraph_graph(&graph_2_locked);
 478                 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 {
 479                                 .data = NULL, .datalen = 0
 480                         }, 5000, 10, logger1);
 481                 assert(route->result_ok);
 482                 LDK::CResult_NonePaymentSendFailureZ send_res = ChannelManager_send_payment(&cm1, route->contents.result, payment_hash_1, payment_secret);
 483                 assert(send_res->result_ok);
 484         }
 485
 486         mons_updated = 0;
 487         PeerManager_process_events(&net1);
 488         while (mons_updated != 4) {
 489                 std::this_thread::yield();
 490         }
 491
 492         // Check that we received the payment!
 493         LDKEventsProvider ev2 = ChannelManager_as_EventsProvider(&cm2);
 494         while (true) {
 495                 LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
 496                 if (events->datalen == 1) {
 497                         assert(events->data[0].tag == LDKEvent_PendingHTLCsForwardable);
 498                         break;
 499                 }
 500                 std::this_thread::yield();
 501         }
 502         ChannelManager_process_pending_htlc_forwards(&cm2);
 503         PeerManager_process_events(&net2);
 504
 505         mons_updated = 0;
 506         {
 507                 LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
 508                 assert(events->datalen == 1);
 509                 assert(events->data[0].tag == LDKEvent_PaymentReceived);
 510                 assert(!memcmp(events->data[0].payment_received.payment_hash.data, payment_hash_1.data, 32));
 511                 assert(!memcmp(events->data[0].payment_received.payment_secret.data, payment_secret.data, 32));
 512                 assert(events->data[0].payment_received.amt == 5000);
 513                 assert(ChannelManager_claim_funds(&cm2, payment_preimage_1, payment_secret, 5000));
 514         }
 515         PeerManager_process_events(&net2);
 516         // Wait until we've passed through a full set of monitor updates (ie new preimage + CS/RAA messages)
 517         while (mons_updated != 5) {
 518                 std::this_thread::yield();
 519         }
 520         {
 521                 LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
 522                 assert(events->datalen == 1);
 523                 assert(events->data[0].tag == LDKEvent_PaymentSent);
 524                 assert(!memcmp(events->data[0].payment_sent.payment_preimage.data, payment_preimage_1.data, 32));
 525         }
 526
 527         // Close the channel.
 528         uint8_t chan_id[32];
 529         for (int i = 0; i < 32; i++) { chan_id[i] = channel_open_txid[31-i]; }
 530         LDK::CResult_NoneAPIErrorZ close_res = ChannelManager_close_channel(&cm1, &chan_id);
 531         assert(close_res->result_ok);
 532         PeerManager_process_events(&net1);
 533         num_txs_broadcasted = 0;
 534         while (num_txs_broadcasted != 2) {
 535                 std::this_thread::yield();
 536         }
 537         LDK::CVec_ChannelDetailsZ chans_after_close1 = ChannelManager_list_channels(&cm1);
 538         assert(chans_after_close1->datalen == 0);
 539         LDK::CVec_ChannelDetailsZ chans_after_close2 = ChannelManager_list_channels(&cm2);
 540         assert(chans_after_close2->datalen == 0);
 541
 542         close(pipefds_1_to_2[0]);
 543         close(pipefds_2_to_1[0]);
 544         close(pipefds_1_to_2[1]);
 545         close(pipefds_2_to_1[1]);
 546         t1.join();
 547         t2.join();
 548
 549         // Few extra random tests:
 550         LDKSecretKey sk;
 551         memset(&sk, 42, 32);
 552         LDKC2Tuple_u64u64Z kdiv_params;
 553         kdiv_params.a = 42;
 554         kdiv_params.b = 42;
 555         LDK::InMemoryChannelKeys keys = InMemoryChannelKeys_new(sk, sk, sk, sk, sk, random_bytes, 42, kdiv_params);
 556 }