git.bitcoin.ninja 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 <atomic>
  13 #include <chrono>
  14 #include <functional>
  15 #include <thread>
  16 #include <mutex>
  17 #include <vector>
  18
  19 const uint8_t valid_node_announcement[] = {
  20         0x94, 0xe4, 0xf5, 0x61, 0x41, 0x24, 0x7d, 0x90, 0x23, 0xa0, 0xc8, 0x34, 0x8c, 0xc4, 0xca, 0x51,
  21         0xd8, 0x17, 0x59, 0xff, 0x7d, 0xac, 0x8c, 0x9b, 0x63, 0x29, 0x1c, 0xe6, 0x12, 0x12, 0x93, 0xbd,
  22         0x66, 0x4d, 0x6b, 0x9c, 0xfb, 0x35, 0xda, 0x16, 0x06, 0x3d, 0xf0, 0x8f, 0x8a, 0x39, 0x99, 0xa2,
  23         0xf2, 0x5d, 0x12, 0x0f, 0x2b, 0x42, 0x1b, 0x8b, 0x9a, 0xfe, 0x33, 0x0c, 0xeb, 0x33, 0x5e, 0x52,
  24         0xee, 0x99, 0xa1, 0x07, 0x06, 0xed, 0xf8, 0x48, 0x7a, 0xc6, 0xe5, 0xf5, 0x5e, 0x01, 0x3a, 0x41,
  25         0x2f, 0x18, 0x94, 0x8a, 0x3b, 0x0a, 0x52, 0x3f, 0xbf, 0x61, 0xa9, 0xc5, 0x4f, 0x70, 0xee, 0xb8,
  26         0x79, 0x23, 0xbb, 0x1a, 0x44, 0x7d, 0x91, 0xe6, 0x2a, 0xbc, 0xa1, 0x07, 0xbc, 0x65, 0x3b, 0x02,
  27         0xd9, 0x1d, 0xb2, 0xf2, 0x3a, 0xcb, 0x75, 0x79, 0xc6, 0x66, 0xd8, 0xc1, 0x71, 0x29, 0xdf, 0x04,
  28         0x60, 0xf4, 0xbf, 0x07, 0x7b, 0xb9, 0xc2, 0x11, 0x94, 0x6a, 0x28, 0xc2, 0xdd, 0xd8, 0x7b, 0x44,
  29         0x8f, 0x08, 0xe3, 0xc8, 0xd8, 0xf4, 0x81, 0xb0, 0x9f, 0x94, 0xcb, 0xc8, 0xc1, 0x3c, 0xc2, 0x6e,
  30         0x31, 0x26, 0xfc, 0x33, 0x16, 0x3b, 0xe0, 0xde, 0xa1, 0x16, 0x21, 0x9f, 0x89, 0xdd, 0x97, 0xa4,
  31         0x41, 0xf2, 0x9f, 0x19, 0xb1, 0xae, 0x82, 0xf7, 0x85, 0x9a, 0xb7, 0x8f, 0xb7, 0x52, 0x7a, 0x72,
  32         0xf1, 0x5e, 0x89, 0xe1, 0x8a, 0xcd, 0x40, 0xb5, 0x8e, 0xc3, 0xca, 0x42, 0x76, 0xa3, 0x6e, 0x1b,
  33         0xf4, 0x87, 0x35, 0x30, 0x58, 0x43, 0x04, 0xd9, 0x2c, 0x50, 0x54, 0x55, 0x47, 0x6f, 0x70, 0x9b,
  34         0x42, 0x1f, 0x91, 0xfc, 0xa1, 0xdb, 0x72, 0x53, 0x96, 0xc8, 0xe5, 0xcd, 0x0e, 0xcb, 0xa0, 0xfe,
  35         0x6b, 0x08, 0x77, 0x48, 0xb7, 0xad, 0x4a, 0x69, 0x7c, 0xdc, 0xd8, 0x04, 0x28, 0x35, 0x9b, 0x73,
  36         0x00, 0x00, 0x43, 0x49, 0x7f, 0xd7, 0xf8, 0x26, 0x95, 0x71, 0x08, 0xf4, 0xa3, 0x0f, 0xd9, 0xce,
  37         0xc3, 0xae, 0xba, 0x79, 0x97, 0x20, 0x84, 0xe9, 0x0e, 0xad, 0x01, 0xea, 0x33, 0x09, 0x00, 0x00,
  38         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x5b, 0xe5, 0xe9, 0x47, 0x82,
  39         0x09, 0x67, 0x4a, 0x96, 0xe6, 0x0f, 0x1f, 0x03, 0x7f, 0x61, 0x76, 0x54, 0x0f, 0xd0, 0x01, 0xfa,
  40         0x1d, 0x64, 0x69, 0x47, 0x70, 0xc5, 0x6a, 0x77, 0x09, 0xc4, 0x2c, 0x03, 0x5c, 0x4e, 0x0d, 0xec,
  41         0x72, 0x15, 0xe2, 0x68, 0x33, 0x93, 0x87, 0x30, 0xe5, 0xe5, 0x05, 0xaa, 0x62, 0x50, 0x4d, 0xa8,
  42         0x5b, 0xa5, 0x71, 0x06, 0xa4, 0x6b, 0x5a, 0x24, 0x04, 0xfc, 0x9d, 0x8e, 0x02, 0xba, 0x72, 0xa6,
  43         0xe8, 0xba, 0x53, 0xe8, 0xb9, 0x71, 0xad, 0x0c, 0x98, 0x23, 0x96, 0x8a, 0xef, 0x4d, 0x78, 0xce,
  44         0x8a, 0xf2, 0x55, 0xab, 0x43, 0xdf, 0xf8, 0x30, 0x03, 0xc9, 0x02, 0xfb, 0x8d, 0x02, 0x16, 0x34,
  45         0x5b, 0xf8, 0x31, 0x16, 0x4a, 0x03, 0x75, 0x8e, 0xae, 0xa5, 0xe8, 0xb6, 0x6f, 0xee, 0x2b, 0xe7,
  46         0x71, 0x0b, 0x8f, 0x19, 0x0e, 0xe8, 0x80, 0x24, 0x90, 0x32, 0xa2, 0x9e, 0xd6, 0x6e
  47 };
  48
  49 // A simple block containing only one transaction (which is the channel-open transaction for the
  50 // channel we'll create). This was originally created by printing additional data in a simple
  51 // rust-lightning unit test.
  52 const uint8_t channel_open_header[80] = {
  53         0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  54         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  55         0x00, 0x00, 0x00, 0x00, 0xa2, 0x47, 0xd2, 0xf8, 0xd4, 0xe0, 0x6a, 0x3f, 0xf9, 0x7a, 0x9a, 0x34,
  56         0xbb, 0xa9, 0x96, 0xde, 0x63, 0x84, 0x5a, 0xce, 0xcf, 0x98, 0xb8, 0xbb, 0x75, 0x4c, 0x4f, 0x7d,
  57         0xee, 0x4c, 0xa9, 0x5f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  58 };
  59
  60 const uint8_t channel_open_tx[] = {
  61         0x02, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 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         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  64         0x01, 0x40, 0x9c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x22, 0x00, 0x20, 0x20, 0x12, 0x70, 0x44,
  65         0x41, 0x40, 0xaf, 0xc5, 0x72, 0x97, 0xc8, 0x69, 0xba, 0x04, 0xdb, 0x28, 0x7b, 0xd7, 0x32, 0x07,
  66         0x33, 0x3a, 0x4a, 0xc2, 0xc5, 0x56, 0x06, 0x05, 0x65, 0xd7, 0xa8, 0xcf, 0x01, 0x00, 0x00, 0x00,
  67         0x00, 0x00
  68 };
  69
  70 // The first transaction in the block is header (80 bytes) + transaction count (1 byte) into the block data.
  71 const uint8_t channel_open_txid[] = {
  72         0x5f, 0xa9, 0x4c, 0xee, 0x7d, 0x4f, 0x4c, 0x75, 0xbb, 0xb8, 0x98, 0xcf, 0xce, 0x5a, 0x84, 0x63,
  73         0xde, 0x96, 0xa9, 0xbb, 0x34, 0x9a, 0x7a, 0xf9, 0x3f, 0x6a, 0xe0, 0xd4, 0xf8, 0xd2, 0x47, 0xa2
  74 };
  75
  76 // Two blocks built on top of channel_open_block:
  77 const uint8_t header_1[80] = {
  78         0x01, 0x00, 0x00, 0x00, 0x65, 0x8e, 0xf1, 0x90, 0x88, 0xfa, 0x13, 0x9c, 0x6a, 0xea, 0xf7, 0xc1,
  79         0x5a, 0xdd, 0x52, 0x4d, 0x3c, 0x48, 0x03, 0xb3, 0x9b, 0x25, 0x4f, 0x02, 0x79, 0x05, 0x90, 0xe0,
  80         0xc4, 0x8d, 0xa0, 0x62, 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         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  83 };
  84 const uint8_t header_2[80] = {
  85         0x01, 0x00, 0x00, 0x00, 0xf2, 0x08, 0x87, 0x51, 0xcb, 0xb1, 0x1a, 0x51, 0x76, 0x01, 0x6c, 0x5d,
  86         0x76, 0x26, 0x54, 0x6f, 0xd9, 0xbd, 0xa6, 0xa5, 0xe9, 0x4b, 0x21, 0x6e, 0xda, 0xa3, 0x64, 0x23,
  87         0xcd, 0xf1, 0xe2, 0xe2, 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         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  90 };
  91
  92 const LDKThirtyTwoBytes payment_preimage_1 = {
  93         .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 }
  94 };
  95 const LDKThirtyTwoBytes payment_hash_1 = {
  96         .data = {
  97                 0xdc, 0xb1, 0xac, 0x4a, 0x5d, 0xe3, 0x70, 0xca, 0xd0, 0x91, 0xc1, 0x3f, 0x13, 0xae, 0xe2, 0xf9,
  98                 0x36, 0xc2, 0x78, 0xfa, 0x05, 0xd2, 0x64, 0x65, 0x3c, 0x0c, 0x13, 0x21, 0x85, 0x2a, 0x35, 0xe8
  99         }
 100 };
 101
 102 const LDKThirtyTwoBytes genesis_hash = { // We don't care particularly if this is "right"
 103         .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 }
 104 };
 105
 106 void print_log(const void *this_arg, const char *record) {
 107         printf("%p - %s\n", this_arg, record);
 108 }
 109
 110 uint32_t get_fee(const void *this_arg, LDKConfirmationTarget target) {
 111         if (target == LDKConfirmationTarget_Background) {
 112                 return 253;
 113         } else {
 114                 return 507;
 115         }
 116         // Note that we don't call _free() on target, but that's OK, its unitary
 117 }
 118 // We use the same fee estimator globally:
 119 const LDKFeeEstimator fee_est {
 120         .this_arg = NULL,
 121         .get_est_sat_per_1000_weight = get_fee,
 122         .free = NULL,
 123 };
 124
 125 static std::atomic_int num_txs_broadcasted(0);
 126 void broadcast_tx(const void *this_arg, LDKTransaction tx) {
 127         num_txs_broadcasted += 1;
 128         //TODO
 129         Transaction_free(tx);
 130 }
 131
 132 struct NodeMonitors {
 133         std::mutex mut;
 134         std::vector<std::pair<LDK::OutPoint, LDK::ChannelMonitor>> mons;
 135         LDKLogger* logger;
 136
 137         void ConnectBlock(const uint8_t (*header)[80], uint32_t height, LDKCVec_C2Tuple_usizeTransactionZZ tx_data, LDKBroadcasterInterface broadcast, LDKFeeEstimator fee_est) {
 138                 std::unique_lock<std::mutex> l(mut);
 139                 for (auto& mon : mons) {
 140                         LDK::CVec_C2Tuple_TxidCVec_C2Tuple_u32TxOutZZZZ res = ChannelMonitor_block_connected(&mon.second, &header_2, tx_data, height, broadcast, fee_est, *logger);
 141                 }
 142         }
 143 };
 144
 145 LDKCResult_NoneChannelMonitorUpdateErrZ add_channel_monitor(const void *this_arg, LDKOutPoint funding_txo_arg, LDKChannelMonitor monitor_arg) {
 146         // First bind the args to C++ objects so they auto-free
 147         LDK::ChannelMonitor mon(std::move(monitor_arg));
 148         LDK::OutPoint funding_txo(std::move(funding_txo_arg));
 149
 150         NodeMonitors* arg = (NodeMonitors*) this_arg;
 151         std::unique_lock<std::mutex> l(arg->mut);
 152
 153         arg->mons.push_back(std::make_pair(std::move(funding_txo), std::move(mon)));
 154         return CResult_NoneChannelMonitorUpdateErrZ_ok();
 155 }
 156 static std::atomic_int mons_updated(0);
 157 LDKCResult_NoneChannelMonitorUpdateErrZ update_channel_monitor(const void *this_arg, LDKOutPoint funding_txo_arg, LDKChannelMonitorUpdate monitor_arg) {
 158         // First bind the args to C++ objects so they auto-free
 159         LDK::ChannelMonitorUpdate update(std::move(monitor_arg));
 160         LDK::OutPoint funding_txo(std::move(funding_txo_arg));
 161
 162         NodeMonitors* arg = (NodeMonitors*) this_arg;
 163         std::unique_lock<std::mutex> l(arg->mut);
 164
 165         bool updated = false;
 166         for (auto& mon : arg->mons) {
 167                 if (OutPoint_get_index(&mon.first) == OutPoint_get_index(&funding_txo) &&
 168                                 !memcmp(OutPoint_get_txid(&mon.first), OutPoint_get_txid(&funding_txo), 32)) {
 169                         updated = true;
 170                         LDKBroadcasterInterface broadcaster = {
 171                                 .broadcast_transaction = broadcast_tx,
 172                         };
 173                         LDK::CResult_NoneMonitorUpdateErrorZ res = ChannelMonitor_update_monitor(&mon.second, &update, &broadcaster, &fee_est, arg->logger);
 174                         assert(res->result_ok);
 175                 }
 176         }
 177         assert(updated);
 178
 179         mons_updated += 1;
 180         return CResult_NoneChannelMonitorUpdateErrZ_ok();
 181 }
 182 LDKCVec_MonitorEventZ monitors_pending_monitor_events(const void *this_arg) {
 183         NodeMonitors* arg = (NodeMonitors*) this_arg;
 184         std::unique_lock<std::mutex> l(arg->mut);
 185
 186         if (arg->mons.size() == 0) {
 187                 return LDKCVec_MonitorEventZ {
 188                         .data = NULL,
 189                         .datalen = 0,
 190                 };
 191         } else {
 192                 // We only ever actually have one channel per node, plus concatenating two
 193                 // Rust Vecs to each other from C++ will require a bit of effort.
 194                 assert(arg->mons.size() == 1);
 195                 return ChannelMonitor_get_and_clear_pending_monitor_events(&arg->mons[0].second);
 196         }
 197 }
 198
 199 uintptr_t sock_send_data(void *this_arg, LDKu8slice data, bool resume_read) {
 200         return write((int)((long)this_arg), data.data, data.datalen);
 201 }
 202 void sock_disconnect_socket(void *this_arg) {
 203         close((int)((long)this_arg));
 204 }
 205 bool sock_eq(const void *this_arg, const LDKSocketDescriptor *other_arg) {
 206         return this_arg == other_arg->this_arg;
 207 }
 208 uint64_t sock_hash(const void *this_arg) {
 209         return (uint64_t)this_arg;
 210 }
 211 void sock_read_data_thread(int rdfd, LDKSocketDescriptor *peer_descriptor, LDKPeerManager *pm) {
 212         unsigned char buf[1024];
 213         LDKu8slice data;
 214         data.data = buf;
 215         ssize_t readlen = 0;
 216         while ((readlen = read(rdfd, buf, 1024)) > 0) {
 217                 data.datalen = readlen;
 218                 LDK::CResult_boolPeerHandleErrorZ res = PeerManager_read_event(&*pm, peer_descriptor, data);
 219                 if (!res->result_ok) {
 220                         peer_descriptor->disconnect_socket(peer_descriptor->this_arg);
 221                         return;
 222                 }
 223                 PeerManager_process_events(pm);
 224         }
 225         PeerManager_socket_disconnected(&*pm, peer_descriptor);
 226 }
 227
 228 class PeersConnection {
 229         int pipefds_1_to_2[2];
 230         int pipefds_2_to_1[2];
 231         std::thread t1, t2;
 232         LDKSocketDescriptor sock1, sock2;
 233
 234 public:
 235         PeersConnection(LDK::ChannelManager& cm1, LDK::ChannelManager& cm2, LDK::PeerManager& net1, LDK::PeerManager& net2) {
 236                 assert(!pipe(pipefds_1_to_2));
 237                 assert(!pipe(pipefds_2_to_1));
 238
 239                 sock1 = LDKSocketDescriptor {
 240                         .this_arg = (void*)(long)pipefds_1_to_2[1],
 241                         .send_data = sock_send_data,
 242                         .disconnect_socket = sock_disconnect_socket,
 243                         .eq = sock_eq,
 244                         .hash = sock_hash,
 245                         .clone = NULL,
 246                         .free = NULL,
 247                 };
 248
 249                 sock2 = LDKSocketDescriptor {
 250                         .this_arg = (void*)(long)pipefds_2_to_1[1],
 251                         .send_data = sock_send_data,
 252                         .disconnect_socket = sock_disconnect_socket,
 253                         .eq = sock_eq,
 254                         .hash = sock_hash,
 255                         .clone = NULL,
 256                         .free = NULL,
 257                 };
 258
 259                 t1 = std::thread(&sock_read_data_thread, pipefds_2_to_1[0], &sock1, &net1);
 260                 t2 = std::thread(&sock_read_data_thread, pipefds_1_to_2[0], &sock2, &net2);
 261
 262                 // Note that we have to bind the result to a C++ class to make sure it gets free'd
 263                 LDK::CResult_CVec_u8ZPeerHandleErrorZ con_res = PeerManager_new_outbound_connection(&net1, ChannelManager_get_our_node_id(&cm2), sock1);
 264                 assert(con_res->result_ok);
 265                 LDK::CResult_NonePeerHandleErrorZ con_res2 = PeerManager_new_inbound_connection(&net2, sock2);
 266                 assert(con_res2->result_ok);
 267
 268                 auto writelen = write(pipefds_1_to_2[1], con_res->contents.result->data, con_res->contents.result->datalen);
 269                 assert(writelen > 0 && uint64_t(writelen) == con_res->contents.result->datalen);
 270
 271                 while (true) {
 272                         // Wait for the initial handshakes to complete...
 273                         LDK::CVec_PublicKeyZ peers_1 = PeerManager_get_peer_node_ids(&net1);
 274                         LDK::CVec_PublicKeyZ peers_2 = PeerManager_get_peer_node_ids(&net2);
 275                         if (peers_1->datalen == 1 && peers_2->datalen ==1) { break; }
 276                         std::this_thread::yield();
 277                 }
 278         }
 279
 280         void stop() {
 281                 close(pipefds_1_to_2[0]);
 282                 close(pipefds_2_to_1[0]);
 283                 close(pipefds_1_to_2[1]);
 284                 close(pipefds_2_to_1[1]);
 285                 t1.join();
 286                 t2.join();
 287         }
 288 };
 289
 290 int main() {
 291         LDKPublicKey null_pk;
 292         memset(&null_pk, 0, sizeof(null_pk));
 293
 294         LDKThirtyTwoBytes random_bytes;
 295
 296         LDKNetwork network = LDKNetwork_Testnet;
 297
 298         // Trait implementations:
 299         LDKBroadcasterInterface broadcast {
 300                 .this_arg = NULL,
 301                 .broadcast_transaction = broadcast_tx,
 302                 .free = NULL,
 303         };
 304
 305         // Instantiate classes for the nodes that don't get reloaded on a ser-des reload
 306         LDKLogger logger1 {
 307                 .this_arg = (void*)1,
 308                 .log = print_log,
 309                 .free = NULL,
 310         };
 311
 312         NodeMonitors mons1;
 313         mons1.logger = &logger1;
 314         LDKWatch mon1 {
 315                 .this_arg = &mons1,
 316                 .watch_channel = add_channel_monitor,
 317                 .update_channel = update_channel_monitor,
 318                 .release_pending_monitor_events = monitors_pending_monitor_events,
 319                 .free = NULL,
 320         };
 321
 322         LDK::NetGraphMsgHandler net_graph1 = NetGraphMsgHandler_new(genesis_hash, NULL, logger1);
 323         LDKSecretKey node_secret1;
 324
 325         LDKLogger logger2 {
 326                 .this_arg = (void*)2,
 327                 .log = print_log,
 328                 .free = NULL,
 329         };
 330
 331         NodeMonitors mons2;
 332         mons2.logger = &logger2;
 333         LDKWatch mon2 {
 334                 .this_arg = &mons2,
 335                 .watch_channel = add_channel_monitor,
 336                 .update_channel = update_channel_monitor,
 337                 .release_pending_monitor_events = monitors_pending_monitor_events,
 338                 .free = NULL,
 339         };
 340
 341         LDK::NetGraphMsgHandler net_graph2 = NetGraphMsgHandler_new(genesis_hash, NULL, logger2);
 342         LDKSecretKey node_secret2;
 343
 344         LDK::CVec_u8Z cm1_ser = LDKCVec_u8Z {}; // ChannelManager 1 serialization at the end of the ser-des scope
 345         LDK::CVec_u8Z cm2_ser = LDKCVec_u8Z {}; // ChannelManager 2 serialization at the end of the ser-des scope
 346
 347         { // Scope for the ser-des reload
 348                 // Instantiate classes for node 1:
 349                 uint8_t node_seed[32];
 350                 memset(&node_seed, 0, 32);
 351                 LDK::KeysManager keys1 = KeysManager_new(&node_seed, network, 0, 0);
 352                 LDK::KeysInterface keys_source1 = KeysManager_as_KeysInterface(&keys1);
 353                 node_secret1 = keys_source1->get_node_secret(keys_source1->this_arg);
 354
 355                 LDK::ChannelManager cm1 = ChannelManager_new(network, fee_est, mon1, broadcast, logger1, KeysManager_as_KeysInterface(&keys1), UserConfig_default(), 0);
 356
 357                 LDK::CVec_ChannelDetailsZ channels = ChannelManager_list_channels(&cm1);
 358                 assert(channels->datalen == 0);
 359
 360                 LDK::MessageHandler msg_handler1 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm1), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph1));
 361
 362                 random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
 363                 LDK::PeerManager net1 = PeerManager_new(std::move(msg_handler1), node_secret1, &random_bytes.data, logger1);
 364
 365                 // Demo getting a channel key and check that its returning real pubkeys:
 366                 LDK::ChannelKeys chan_keys1 = keys_source1->get_channel_keys(keys_source1->this_arg, false, 42);
 367                 chan_keys1->set_pubkeys(&chan_keys1); // Make sure pubkeys is defined
 368                 LDKPublicKey payment_point = ChannelPublicKeys_get_payment_point(&chan_keys1->pubkeys);
 369                 assert(memcmp(&payment_point, &null_pk, sizeof(null_pk)));
 370
 371                 // Instantiate classes for node 2:
 372                 memset(&node_seed, 1, 32);
 373                 LDK::KeysManager keys2 = KeysManager_new(&node_seed, network, 0, 0);
 374                 LDK::KeysInterface keys_source2 = KeysManager_as_KeysInterface(&keys2);
 375                 node_secret2 = keys_source2->get_node_secret(keys_source2->this_arg);
 376
 377                 LDK::ChannelHandshakeConfig handshake_config2 = ChannelHandshakeConfig_default();
 378                 ChannelHandshakeConfig_set_minimum_depth(&handshake_config2, 2);
 379                 LDK::UserConfig config2 = UserConfig_default();
 380                 UserConfig_set_own_channel_config(&config2, std::move(handshake_config2));
 381
 382                 LDK::ChannelManager cm2 = ChannelManager_new(network, fee_est, mon2, broadcast, logger2, KeysManager_as_KeysInterface(&keys2), std::move(config2), 0);
 383
 384                 LDK::CVec_ChannelDetailsZ channels2 = ChannelManager_list_channels(&cm2);
 385                 assert(channels2->datalen == 0);
 386
 387                 LDK::RoutingMessageHandler net_msgs2 = NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph2);
 388                 LDK::ChannelAnnouncement chan_ann = ChannelAnnouncement_read(LDKu8slice { .data = valid_node_announcement, .datalen = sizeof(valid_node_announcement) });
 389                 LDK::CResult_boolLightningErrorZ ann_res = net_msgs2->handle_channel_announcement(net_msgs2->this_arg, &chan_ann);
 390                 assert(ann_res->result_ok);
 391
 392                 LDK::MessageHandler msg_handler2 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm2), std::move(net_msgs2));
 393
 394                 random_bytes = keys_source2->get_secure_random_bytes(keys_source2->this_arg);
 395                 LDK::PeerManager net2 = PeerManager_new(std::move(msg_handler2), node_secret2, &random_bytes.data, logger2);
 396
 397                 // Open a connection!
 398                 PeersConnection conn(cm1, cm2, net1, net2);
 399
 400                 // Note that we have to bind the result to a C++ class to make sure it gets free'd
 401                 LDK::CResult_NoneAPIErrorZ res = ChannelManager_create_channel(&cm1, ChannelManager_get_our_node_id(&cm2), 40000, 1000, 42, UserConfig_default());
 402                 assert(res->result_ok);
 403                 PeerManager_process_events(&net1);
 404
 405                 LDK::CVec_ChannelDetailsZ new_channels = ChannelManager_list_channels(&cm1);
 406                 assert(new_channels->datalen == 1);
 407                 LDKPublicKey chan_open_pk = ChannelDetails_get_remote_network_id(&new_channels->data[0]);
 408                 assert(!memcmp(chan_open_pk.compressed_form, ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
 409
 410                 while (true) {
 411                         LDK::CVec_ChannelDetailsZ new_channels_2 = ChannelManager_list_channels(&cm2);
 412                         if (new_channels_2->datalen == 1) {
 413                                 // Sample getting our counterparty's init features (which used to be hard to do without a memory leak):
 414                                 const LDK::InitFeatures init_feats = ChannelDetails_get_counterparty_features(&new_channels_2->data[0]);
 415                                 assert(init_feats->inner != NULL);
 416                                 break;
 417                         }
 418                         std::this_thread::yield();
 419                 }
 420
 421                 LDKEventsProvider ev1 = ChannelManager_as_EventsProvider(&cm1);
 422                 while (true) {
 423                         LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
 424                         if (events->datalen == 1) {
 425                                 assert(events->data[0].tag == LDKEvent_FundingGenerationReady);
 426                                 assert(events->data[0].funding_generation_ready.user_channel_id == 42);
 427                                 assert(events->data[0].funding_generation_ready.channel_value_satoshis == 40000);
 428                                 assert(events->data[0].funding_generation_ready.output_script.datalen == 34);
 429                                 assert(!memcmp(events->data[0].funding_generation_ready.output_script.data, channel_open_tx + 58, 34));
 430                                 LDKThirtyTwoBytes txid;
 431                                 for (int i = 0; i < 32; i++) { txid.data[i] = channel_open_txid[31-i]; }
 432                                 LDK::OutPoint outp = OutPoint_new(txid, 0);
 433                                 ChannelManager_funding_transaction_generated(&cm1, &events->data[0].funding_generation_ready.temporary_channel_id.data, std::move(outp));
 434                                 break;
 435                         }
 436                         std::this_thread::yield();
 437                 }
 438
 439                 // We observe when the funding signed messages have been exchanged by
 440                 // waiting for two monitors to be registered.
 441                 PeerManager_process_events(&net1);
 442                 while (true) {
 443                         LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
 444                         if (events->datalen == 1) {
 445                                 assert(events->data[0].tag == LDKEvent_FundingBroadcastSafe);
 446                                 assert(events->data[0].funding_broadcast_safe.user_channel_id == 42);
 447                                 break;
 448                         }
 449                         std::this_thread::yield();
 450                 }
 451
 452                 LDKCVec_C2Tuple_usizeTransactionZZ txdata { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
 453                 *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 454                 ChannelManager_block_connected(&cm1, &channel_open_header, txdata, 1);
 455
 456                 txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
 457                 *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 458                 ChannelManager_block_connected(&cm2, &channel_open_header, txdata, 1);
 459
 460                 txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
 461                 *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 462                 mons1.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
 463
 464                 txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
 465                 *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
 466                 mons2.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
 467
 468                 ChannelManager_block_connected(&cm1, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
 469                 ChannelManager_block_connected(&cm2, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
 470                 mons1.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 471                 mons2.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 472
 473                 ChannelManager_block_connected(&cm1, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
 474                 ChannelManager_block_connected(&cm2, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
 475                 mons1.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 476                 mons2.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
 477
 478                 PeerManager_process_events(&net1);
 479                 PeerManager_process_events(&net2);
 480
 481                 // Now send funds from 1 to 2!
 482                 while (true) {
 483                         LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
 484                         if (outbound_channels->datalen == 1) {
 485                                 const LDKChannelDetails *channel = &outbound_channels->data[0];
 486                                 // Note that the channel ID is the same as the channel txid reversed as the output index is 0
 487                                 uint8_t expected_chan_id[32];
 488                                 for (int i = 0; i < 32; i++) { expected_chan_id[i] = channel_open_txid[31-i]; }
 489                                 assert(!memcmp(ChannelDetails_get_channel_id(channel), expected_chan_id, 32));
 490                                 assert(!memcmp(ChannelDetails_get_remote_network_id(channel).compressed_form,
 491                                                 ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
 492                                 assert(ChannelDetails_get_channel_value_satoshis(channel) == 40000);
 493                                 // We opened the channel with 1000 push_msat:
 494                                 assert(ChannelDetails_get_outbound_capacity_msat(channel) == 40000*1000 - 1000);
 495                                 assert(ChannelDetails_get_inbound_capacity_msat(channel) == 1000);
 496                                 assert(ChannelDetails_get_is_live(channel));
 497                                 break;
 498                         }
 499                         std::this_thread::yield();
 500                 }
 501
 502                 LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
 503                 LDKThirtyTwoBytes payment_secret;
 504                 memset(payment_secret.data, 0x42, 32);
 505                 {
 506                         LDK::LockedNetworkGraph graph_2_locked = NetGraphMsgHandler_read_locked_graph(&net_graph2);
 507                         LDK::NetworkGraph graph_2_ref = LockedNetworkGraph_graph(&graph_2_locked);
 508                         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 {
 509                                         .data = NULL, .datalen = 0
 510                                 }, 5000, 10, logger1);
 511                         assert(route->result_ok);
 512                         LDK::CResult_NonePaymentSendFailureZ send_res = ChannelManager_send_payment(&cm1, route->contents.result, payment_hash_1, payment_secret);
 513                         assert(send_res->result_ok);
 514                 }
 515
 516                 mons_updated = 0;
 517                 PeerManager_process_events(&net1);
 518                 while (mons_updated != 4) {
 519                         std::this_thread::yield();
 520                 }
 521
 522                 // Check that we received the payment!
 523                 LDKEventsProvider ev2 = ChannelManager_as_EventsProvider(&cm2);
 524                 while (true) {
 525                         LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
 526                         if (events->datalen == 1) {
 527                                 assert(events->data[0].tag == LDKEvent_PendingHTLCsForwardable);
 528                                 break;
 529                         }
 530                         std::this_thread::yield();
 531                 }
 532                 ChannelManager_process_pending_htlc_forwards(&cm2);
 533                 PeerManager_process_events(&net2);
 534
 535                 mons_updated = 0;
 536                 {
 537                         LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
 538                         assert(events->datalen == 1);
 539                         assert(events->data[0].tag == LDKEvent_PaymentReceived);
 540                         assert(!memcmp(events->data[0].payment_received.payment_hash.data, payment_hash_1.data, 32));
 541                         assert(!memcmp(events->data[0].payment_received.payment_secret.data, payment_secret.data, 32));
 542                         assert(events->data[0].payment_received.amt == 5000);
 543                         assert(ChannelManager_claim_funds(&cm2, payment_preimage_1, payment_secret, 5000));
 544                 }
 545                 PeerManager_process_events(&net2);
 546                 // Wait until we've passed through a full set of monitor updates (ie new preimage + CS/RAA messages)
 547                 while (mons_updated != 5) {
 548                         std::this_thread::yield();
 549                 }
 550                 {
 551                         LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
 552                         assert(events->datalen == 1);
 553                         assert(events->data[0].tag == LDKEvent_PaymentSent);
 554                         assert(!memcmp(events->data[0].payment_sent.payment_preimage.data, payment_preimage_1.data, 32));
 555                 }
 556
 557                 conn.stop();
 558
 559                 cm1_ser = ChannelManager_write(&cm1);
 560                 cm2_ser = ChannelManager_write(&cm2);
 561         }
 562
 563         LDK::CVec_ChannelMonitorZ mons_list1 = LDKCVec_ChannelMonitorZ { .data = (LDKChannelMonitor*)malloc(sizeof(LDKChannelMonitor)), .datalen = 1 };
 564         assert(mons1.mons.size() == 1);
 565         mons_list1->data[0] = *& std::get<1>(mons1.mons[0]); // Note that we need a reference, thus need a raw clone here, which *& does.
 566         mons_list1->data[0].is_owned = false; // XXX: God this sucks
 567         uint8_t node_seed[32];
 568         memset(&node_seed, 0, 32);
 569         LDK::KeysManager keys1 = KeysManager_new(&node_seed, network, 1, 0);
 570         LDK::KeysInterface keys_source1 = KeysManager_as_KeysInterface(&keys1);
 571
 572         LDK::ChannelManagerReadArgs cm1_args = ChannelManagerReadArgs_new(KeysManager_as_KeysInterface(&keys1), fee_est, mon1, broadcast, logger1, UserConfig_default(), std::move(mons_list1));
 573         LDK::CResult_C2Tuple_BlockHashChannelManagerZDecodeErrorZ cm1_read =
 574                 C2Tuple_BlockHashChannelManagerZ_read(LDKu8slice { .data = cm1_ser->data, .datalen = cm1_ser -> datalen}, std::move(cm1_args));
 575         assert(cm1_read->result_ok);
 576         LDK::ChannelManager cm1(std::move(cm1_read->contents.result->b));
 577
 578         LDK::CVec_ChannelMonitorZ mons_list2 = LDKCVec_ChannelMonitorZ { .data = (LDKChannelMonitor*)malloc(sizeof(LDKChannelMonitor)), .datalen = 1 };
 579         assert(mons2.mons.size() == 1);
 580         mons_list2->data[0] = *& std::get<1>(mons2.mons[0]); // Note that we need a reference, thus need a raw clone here, which *& does.
 581         mons_list2->data[0].is_owned = false; // XXX: God this sucks
 582         memset(&node_seed, 1, 32);
 583         LDK::KeysManager keys2 = KeysManager_new(&node_seed, network, 1, 0);
 584
 585         LDK::ChannelManagerReadArgs cm2_args = ChannelManagerReadArgs_new(KeysManager_as_KeysInterface(&keys2), fee_est, mon2, broadcast, logger2, UserConfig_default(), std::move(mons_list2));
 586         LDK::CResult_C2Tuple_BlockHashChannelManagerZDecodeErrorZ cm2_read =
 587                 C2Tuple_BlockHashChannelManagerZ_read(LDKu8slice { .data = cm2_ser->data, .datalen = cm2_ser -> datalen}, std::move(cm2_args));
 588         assert(cm2_read->result_ok);
 589         LDK::ChannelManager cm2(std::move(cm2_read->contents.result->b));
 590
 591         // Attempt to close the channel...
 592         uint8_t chan_id[32];
 593         for (int i = 0; i < 32; i++) { chan_id[i] = channel_open_txid[31-i]; }
 594         LDK::CResult_NoneAPIErrorZ close_res = ChannelManager_close_channel(&cm1, &chan_id);
 595         assert(!close_res->result_ok); // Note that we can't close while disconnected!
 596
 597         // Open a connection!
 598         LDK::MessageHandler msg_handler1 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm1), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph1));
 599         random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
 600         LDK::PeerManager net1 = PeerManager_new(std::move(msg_handler1), node_secret1, &random_bytes.data, logger1);
 601
 602         LDK::MessageHandler msg_handler2 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm2), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph2));
 603         random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
 604         LDK::PeerManager net2 = PeerManager_new(std::move(msg_handler2), node_secret2, &random_bytes.data, logger2);
 605
 606         PeersConnection conn(cm1, cm2, net1, net2);
 607
 608         while (true) {
 609                 // Wait for the channels to be considered up once the reestablish messages are processed
 610                 LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
 611                 if (outbound_channels->datalen == 1) {
 612                         break;
 613                 }
 614         }
 615
 616         // Actually close the channel
 617         close_res = ChannelManager_close_channel(&cm1, &chan_id);
 618         assert(close_res->result_ok);
 619         PeerManager_process_events(&net1);
 620         num_txs_broadcasted = 0;
 621         while (num_txs_broadcasted != 2) {
 622                 std::this_thread::yield();
 623         }
 624         LDK::CVec_ChannelDetailsZ chans_after_close1 = ChannelManager_list_channels(&cm1);
 625         assert(chans_after_close1->datalen == 0);
 626         LDK::CVec_ChannelDetailsZ chans_after_close2 = ChannelManager_list_channels(&cm2);
 627         assert(chans_after_close2->datalen == 0);
 628
 629         conn.stop();
 630
 631         // Few extra random tests:
 632         LDKSecretKey sk;
 633         memset(&sk, 42, 32);
 634         LDKC2Tuple_u64u64Z kdiv_params;
 635         kdiv_params.a = 42;
 636         kdiv_params.b = 42;
 637         LDK::InMemoryChannelKeys keys = InMemoryChannelKeys_new(sk, sk, sk, sk, sk, random_bytes, 42, kdiv_params);
 638 }