_ Git - ldk-c-bindings/blob - lightning-c-bindings/demo.c

   1 #include <lightning.h>
   2
   3 #include <assert.h>
   4 #include <stdio.h>
   5 #include <string.h>
   6
   7 void print_log(const void *this_arg, const char *record) {
   8         printf("%s", record);
   9 }
  10
  11 uint32_t get_fee(const void *this_arg, LDKConfirmationTarget target) {
  12         if (target == LDKConfirmationTarget_Background) {
  13                 return 253;
  14         } else {
  15                 return 507;
  16         }
  17 }
  18
  19 void broadcast_tx(const void *this_arg, LDKTransaction tx) {
  20         //TODO
  21         Transaction_free(tx);
  22 }
  23
  24 LDKCResult_NoneChannelMonitorUpdateErrZ add_channel_monitor(const void *this_arg, LDKOutPoint funding_txo, LDKChannelMonitor monitor) {
  25         return CResult_NoneChannelMonitorUpdateErrZ_ok();
  26 }
  27 LDKCResult_NoneChannelMonitorUpdateErrZ update_channel_monitor(const void *this_arg, LDKOutPoint funding_txo, LDKChannelMonitorUpdate monitor) {
  28         return CResult_NoneChannelMonitorUpdateErrZ_ok();
  29 }
  30 LDKCVec_MonitorEventZ monitors_pending_monitor_events(const void *this_arg) {
  31         LDKCVec_MonitorEventZ empty_htlc_vec = {
  32                 .data = NULL,
  33                 .datalen = 0,
  34         };
  35         return empty_htlc_vec;
  36 }
  37
  38 void never_handle_event(const void *this_arg, struct LDKEvent event) {
  39         // Note that we never actually generate any events to handle in the code below.
  40         assert(false);
  41 }
  42
  43 int main() {
  44         uint8_t node_seed[32];
  45         memset(node_seed, 0, 32);
  46
  47         LDKNetwork net = LDKNetwork_Bitcoin;
  48
  49         LDKLogger logger = {
  50                 .this_arg = NULL,
  51                 .log = print_log,
  52                 .free = NULL,
  53         };
  54
  55         LDKFeeEstimator fee_est = {
  56                 .this_arg = NULL,
  57                 .get_est_sat_per_1000_weight = get_fee,
  58                 .free = NULL
  59         };
  60
  61         LDKWatch mon = {
  62                 .this_arg = NULL,
  63                 .watch_channel = add_channel_monitor,
  64                 .update_channel = update_channel_monitor,
  65                 .release_pending_monitor_events = monitors_pending_monitor_events,
  66                 .free = NULL,
  67         };
  68
  69         LDKBroadcasterInterface broadcast = {
  70                 broadcast.this_arg = NULL,
  71                 broadcast.broadcast_transaction = broadcast_tx,
  72                 .free = NULL,
  73         };
  74
  75         LDKKeysManager keys = KeysManager_new(&node_seed, 0, 0);
  76         LDKKeysInterface keys_source = KeysManager_as_KeysInterface(&keys);
  77
  78         LDKUserConfig config = UserConfig_default();
  79         LDKThirtyTwoBytes chain_tip;
  80         memset(&chain_tip, 0, 32);
  81         LDKChainParameters chain = ChainParameters_new(net, BestBlock_new(chain_tip, 0));
  82         LDKChannelManager cm = ChannelManager_new(fee_est, mon, broadcast, logger, keys_source, config, chain);
  83
  84         LDKCVec_ChannelDetailsZ channels = ChannelManager_list_channels(&cm);
  85         assert((unsigned long)channels.data < 4096); // There's an offset, but it should still be an offset against null in the 0 page
  86         assert(channels.datalen == 0);
  87         CVec_ChannelDetailsZ_free(channels);
  88
  89         LDKEventsProvider prov = ChannelManager_as_EventsProvider(&cm);
  90         // Check that no events were generated by asserting if any events are passed to never_handle_event.
  91         LDKEventHandler handler = { .handle_event = never_handle_event, .free = NULL };
  92         (prov.process_pending_events)(prov.this_arg, handler);
  93
  94         ChannelManager_free(cm);
  95         KeysManager_free(keys);
  96
  97         // Check that passing empty vecs to rust doesn't blow it up:
  98         LDKCVec_MonitorEventZ empty_htlc_vec = {
  99                 .data = NULL,
 100                 .datalen = 0,
 101         };
 102         CVec_MonitorEventZ_free(empty_htlc_vec);
 103 }