]> git.bitcoin.ninja Git - rust-lightning/commitdiff
Update C++ bindings demo to use `ChannelManager` de/serialization
authorMatt Corallo <git@bluematt.me>
Thu, 31 Dec 2020 22:48:55 +0000 (17:48 -0500)
committerMatt Corallo <git@bluematt.me>
Mon, 4 Jan 2021 21:14:26 +0000 (16:14 -0500)
This demonstrates (and tests) the newly-exposed `ChannelManager`
de/serialization functions. Best revewied with -b --color-moved.

lightning-c-bindings/demo.cpp

index 0408486aa9fbc068bcec266e5e0ddfab1bc85525..cf8ca1baf3175c149f67dc04036ed68fcf455dc6 100644 (file)
@@ -9,6 +9,7 @@ extern "C" {
 #include <sys/socket.h>
 #include <unistd.h>
 
+#include <atomic>
 #include <chrono>
 #include <functional>
 #include <thread>
@@ -121,7 +122,7 @@ const LDKFeeEstimator fee_est {
        .free = NULL,
 };
 
-static int num_txs_broadcasted = 0; // Technically a race, but ints are atomic on x86
+static std::atomic_int num_txs_broadcasted(0);
 void broadcast_tx(const void *this_arg, LDKTransaction tx) {
        num_txs_broadcasted += 1;
        //TODO
@@ -152,7 +153,7 @@ LDKCResult_NoneChannelMonitorUpdateErrZ add_channel_monitor(const void *this_arg
        arg->mons.push_back(std::make_pair(std::move(funding_txo), std::move(mon)));
        return CResult_NoneChannelMonitorUpdateErrZ_ok();
 }
-static int mons_updated = 0; // Technically a race, but ints are atomic on x86.
+static std::atomic_int mons_updated(0);
 LDKCResult_NoneChannelMonitorUpdateErrZ update_channel_monitor(const void *this_arg, LDKOutPoint funding_txo_arg, LDKChannelMonitorUpdate monitor_arg) {
        // First bind the args to C++ objects so they auto-free
        LDK::ChannelMonitorUpdate update(std::move(monitor_arg));
@@ -224,13 +225,74 @@ void sock_read_data_thread(int rdfd, LDKSocketDescriptor *peer_descriptor, LDKPe
        PeerManager_socket_disconnected(&*pm, peer_descriptor);
 }
 
-int main() {
-       uint8_t node_seed[32];
-       memset(&node_seed, 0, 32);
+class PeersConnection {
+       int pipefds_1_to_2[2];
+       int pipefds_2_to_1[2];
+       std::thread t1, t2;
+       LDKSocketDescriptor sock1, sock2;
+
+public:
+       PeersConnection(LDK::ChannelManager& cm1, LDK::ChannelManager& cm2, LDK::PeerManager& net1, LDK::PeerManager& net2) {
+               assert(!pipe(pipefds_1_to_2));
+               assert(!pipe(pipefds_2_to_1));
+
+               sock1 = LDKSocketDescriptor {
+                       .this_arg = (void*)(long)pipefds_1_to_2[1],
+                       .send_data = sock_send_data,
+                       .disconnect_socket = sock_disconnect_socket,
+                       .eq = sock_eq,
+                       .hash = sock_hash,
+                       .clone = NULL,
+                       .free = NULL,
+               };
 
+               sock2 = LDKSocketDescriptor {
+                       .this_arg = (void*)(long)pipefds_2_to_1[1],
+                       .send_data = sock_send_data,
+                       .disconnect_socket = sock_disconnect_socket,
+                       .eq = sock_eq,
+                       .hash = sock_hash,
+                       .clone = NULL,
+                       .free = NULL,
+               };
+
+               t1 = std::thread(&sock_read_data_thread, pipefds_2_to_1[0], &sock1, &net1);
+               t2 = std::thread(&sock_read_data_thread, pipefds_1_to_2[0], &sock2, &net2);
+
+               // Note that we have to bind the result to a C++ class to make sure it gets free'd
+               LDK::CResult_CVec_u8ZPeerHandleErrorZ con_res = PeerManager_new_outbound_connection(&net1, ChannelManager_get_our_node_id(&cm2), sock1);
+               assert(con_res->result_ok);
+               LDK::CResult_NonePeerHandleErrorZ con_res2 = PeerManager_new_inbound_connection(&net2, sock2);
+               assert(con_res2->result_ok);
+
+               auto writelen = write(pipefds_1_to_2[1], con_res->contents.result->data, con_res->contents.result->datalen);
+               assert(writelen > 0 && uint64_t(writelen) == con_res->contents.result->datalen);
+
+               while (true) {
+                       // Wait for the initial handshakes to complete...
+                       LDK::CVec_PublicKeyZ peers_1 = PeerManager_get_peer_node_ids(&net1);
+                       LDK::CVec_PublicKeyZ peers_2 = PeerManager_get_peer_node_ids(&net2);
+                       if (peers_1->datalen == 1 && peers_2->datalen ==1) { break; }
+                       std::this_thread::yield();
+               }
+       }
+
+       void stop() {
+               close(pipefds_1_to_2[0]);
+               close(pipefds_2_to_1[0]);
+               close(pipefds_1_to_2[1]);
+               close(pipefds_2_to_1[1]);
+               t1.join();
+               t2.join();
+       }
+};
+
+int main() {
        LDKPublicKey null_pk;
        memset(&null_pk, 0, sizeof(null_pk));
 
+       LDKThirtyTwoBytes random_bytes;
+
        LDKNetwork network = LDKNetwork_Testnet;
 
        // Trait implementations:
@@ -240,8 +302,7 @@ int main() {
                .free = NULL,
        };
 
-       // Instantiate classes for node 1:
-
+       // Instantiate classes for the nodes that don't get reloaded on a ser-des reload
        LDKLogger logger1 {
                .this_arg = (void*)1,
                .log = print_log,
@@ -258,29 +319,8 @@ int main() {
                .free = NULL,
        };
 
-       LDK::KeysManager keys1 = KeysManager_new(&node_seed, network, 0, 0);
-       LDK::KeysInterface keys_source1 = KeysManager_as_KeysInterface(&keys1);
-       LDKSecretKey node_secret1 = keys_source1->get_node_secret(keys_source1->this_arg);
-
-       LDK::ChannelManager cm1 = ChannelManager_new(network, fee_est, mon1, broadcast, logger1, KeysManager_as_KeysInterface(&keys1), UserConfig_default(), 0);
-
-       LDK::CVec_ChannelDetailsZ channels = ChannelManager_list_channels(&cm1);
-       assert(channels->datalen == 0);
-
        LDK::NetGraphMsgHandler net_graph1 = NetGraphMsgHandler_new(genesis_hash, NULL, logger1);
-
-       LDK::MessageHandler msg_handler1 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm1), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph1));
-
-       LDKThirtyTwoBytes random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
-       LDK::PeerManager net1 = PeerManager_new(std::move(msg_handler1), node_secret1, &random_bytes.data, logger1);
-
-       // Demo getting a channel key and check that its returning real pubkeys:
-       LDK::ChannelKeys chan_keys1 = keys_source1->get_channel_keys(keys_source1->this_arg, false, 42);
-       chan_keys1->set_pubkeys(&chan_keys1); // Make sure pubkeys is defined
-       LDKPublicKey payment_point = ChannelPublicKeys_get_payment_point(&chan_keys1->pubkeys);
-       assert(memcmp(&payment_point, &null_pk, sizeof(null_pk)));
-
-       // Instantiate classes for node 2:
+       LDKSecretKey node_secret1;
 
        LDKLogger logger2 {
                .this_arg = (void*)2,
@@ -298,239 +338,275 @@ int main() {
                .free = NULL,
        };
 
-       memset(&node_seed, 1, 32);
-       LDK::KeysManager keys2 = KeysManager_new(&node_seed, network, 0, 0);
-       LDK::KeysInterface keys_source2 = KeysManager_as_KeysInterface(&keys2);
-       LDKSecretKey node_secret2 = keys_source2->get_node_secret(keys_source2->this_arg);
-
-       LDK::ChannelHandshakeConfig handshake_config2 = ChannelHandshakeConfig_default();
-       ChannelHandshakeConfig_set_minimum_depth(&handshake_config2, 2);
-       LDK::UserConfig config2 = UserConfig_default();
-       UserConfig_set_own_channel_config(&config2, std::move(handshake_config2));
-
-       LDK::ChannelManager cm2 = ChannelManager_new(network, fee_est, mon2, broadcast, logger2, KeysManager_as_KeysInterface(&keys2), std::move(config2), 0);
-
-       LDK::CVec_ChannelDetailsZ channels2 = ChannelManager_list_channels(&cm2);
-       assert(channels2->datalen == 0);
-
        LDK::NetGraphMsgHandler net_graph2 = NetGraphMsgHandler_new(genesis_hash, NULL, logger2);
-       LDK::RoutingMessageHandler net_msgs2 = NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph2);
-       LDK::ChannelAnnouncement chan_ann = ChannelAnnouncement_read(LDKu8slice { .data = valid_node_announcement, .datalen = sizeof(valid_node_announcement) });
-       LDK::CResult_boolLightningErrorZ ann_res = net_msgs2->handle_channel_announcement(net_msgs2->this_arg, &chan_ann);
-       assert(ann_res->result_ok);
-
-       LDK::MessageHandler msg_handler2 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm2), std::move(net_msgs2));
-
-       LDKThirtyTwoBytes random_bytes2 = keys_source2->get_secure_random_bytes(keys_source2->this_arg);
-       LDK::PeerManager net2 = PeerManager_new(std::move(msg_handler2), node_secret2, &random_bytes2.data, logger2);
-
-       // Open a connection!
-       int pipefds_1_to_2[2];
-       int pipefds_2_to_1[2];
-       assert(!pipe(pipefds_1_to_2));
-       assert(!pipe(pipefds_2_to_1));
-
-       LDKSocketDescriptor sock1 {
-               .this_arg = (void*)(long)pipefds_1_to_2[1],
-               .send_data = sock_send_data,
-               .disconnect_socket = sock_disconnect_socket,
-               .eq = sock_eq,
-               .hash = sock_hash,
-               .clone = NULL,
-               .free = NULL,
-       };
-
-       LDKSocketDescriptor sock2 {
-               .this_arg = (void*)(long)pipefds_2_to_1[1],
-               .send_data = sock_send_data,
-               .disconnect_socket = sock_disconnect_socket,
-               .eq = sock_eq,
-               .hash = sock_hash,
-               .clone = NULL,
-               .free = NULL,
-       };
-
-       std::thread t1(&sock_read_data_thread, pipefds_2_to_1[0], &sock1, &net1);
-       std::thread t2(&sock_read_data_thread, pipefds_1_to_2[0], &sock2, &net2);
-
-       // Note that we have to bind the result to a C++ class to make sure it gets free'd
-       LDK::CResult_CVec_u8ZPeerHandleErrorZ con_res = PeerManager_new_outbound_connection(&net1, ChannelManager_get_our_node_id(&cm2), sock1);
-       assert(con_res->result_ok);
-       LDK::CResult_NonePeerHandleErrorZ con_res2 = PeerManager_new_inbound_connection(&net2, sock2);
-       assert(con_res2->result_ok);
-
-       auto writelen = write(pipefds_1_to_2[1], con_res->contents.result->data, con_res->contents.result->datalen);
-       assert(writelen > 0 && uint64_t(writelen) == con_res->contents.result->datalen);
+       LDKSecretKey node_secret2;
+
+       LDK::CVec_u8Z cm1_ser = LDKCVec_u8Z {}; // ChannelManager 1 serialization at the end of the ser-des scope
+       LDK::CVec_u8Z cm2_ser = LDKCVec_u8Z {}; // ChannelManager 2 serialization at the end of the ser-des scope
+
+       { // Scope for the ser-des reload
+               // Instantiate classes for node 1:
+               uint8_t node_seed[32];
+               memset(&node_seed, 0, 32);
+               LDK::KeysManager keys1 = KeysManager_new(&node_seed, network, 0, 0);
+               LDK::KeysInterface keys_source1 = KeysManager_as_KeysInterface(&keys1);
+               node_secret1 = keys_source1->get_node_secret(keys_source1->this_arg);
+
+               LDK::ChannelManager cm1 = ChannelManager_new(network, fee_est, mon1, broadcast, logger1, KeysManager_as_KeysInterface(&keys1), UserConfig_default(), 0);
+
+               LDK::CVec_ChannelDetailsZ channels = ChannelManager_list_channels(&cm1);
+               assert(channels->datalen == 0);
+
+               LDK::MessageHandler msg_handler1 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm1), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph1));
+
+               random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
+               LDK::PeerManager net1 = PeerManager_new(std::move(msg_handler1), node_secret1, &random_bytes.data, logger1);
+
+               // Demo getting a channel key and check that its returning real pubkeys:
+               LDK::ChannelKeys chan_keys1 = keys_source1->get_channel_keys(keys_source1->this_arg, false, 42);
+               chan_keys1->set_pubkeys(&chan_keys1); // Make sure pubkeys is defined
+               LDKPublicKey payment_point = ChannelPublicKeys_get_payment_point(&chan_keys1->pubkeys);
+               assert(memcmp(&payment_point, &null_pk, sizeof(null_pk)));
+
+               // Instantiate classes for node 2:
+               memset(&node_seed, 1, 32);
+               LDK::KeysManager keys2 = KeysManager_new(&node_seed, network, 0, 0);
+               LDK::KeysInterface keys_source2 = KeysManager_as_KeysInterface(&keys2);
+               node_secret2 = keys_source2->get_node_secret(keys_source2->this_arg);
+
+               LDK::ChannelHandshakeConfig handshake_config2 = ChannelHandshakeConfig_default();
+               ChannelHandshakeConfig_set_minimum_depth(&handshake_config2, 2);
+               LDK::UserConfig config2 = UserConfig_default();
+               UserConfig_set_own_channel_config(&config2, std::move(handshake_config2));
+
+               LDK::ChannelManager cm2 = ChannelManager_new(network, fee_est, mon2, broadcast, logger2, KeysManager_as_KeysInterface(&keys2), std::move(config2), 0);
+
+               LDK::CVec_ChannelDetailsZ channels2 = ChannelManager_list_channels(&cm2);
+               assert(channels2->datalen == 0);
+
+               LDK::RoutingMessageHandler net_msgs2 = NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph2);
+               LDK::ChannelAnnouncement chan_ann = ChannelAnnouncement_read(LDKu8slice { .data = valid_node_announcement, .datalen = sizeof(valid_node_announcement) });
+               LDK::CResult_boolLightningErrorZ ann_res = net_msgs2->handle_channel_announcement(net_msgs2->this_arg, &chan_ann);
+               assert(ann_res->result_ok);
+
+               LDK::MessageHandler msg_handler2 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm2), std::move(net_msgs2));
+
+               random_bytes = keys_source2->get_secure_random_bytes(keys_source2->this_arg);
+               LDK::PeerManager net2 = PeerManager_new(std::move(msg_handler2), node_secret2, &random_bytes.data, logger2);
+
+               // Open a connection!
+               PeersConnection conn(cm1, cm2, net1, net2);
+
+               // Note that we have to bind the result to a C++ class to make sure it gets free'd
+               LDK::CResult_NoneAPIErrorZ res = ChannelManager_create_channel(&cm1, ChannelManager_get_our_node_id(&cm2), 40000, 1000, 42, UserConfig_default());
+               assert(res->result_ok);
+               PeerManager_process_events(&net1);
+
+               LDK::CVec_ChannelDetailsZ new_channels = ChannelManager_list_channels(&cm1);
+               assert(new_channels->datalen == 1);
+               LDKPublicKey chan_open_pk = ChannelDetails_get_remote_network_id(&new_channels->data[0]);
+               assert(!memcmp(chan_open_pk.compressed_form, ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
+
+               while (true) {
+                       LDK::CVec_ChannelDetailsZ new_channels_2 = ChannelManager_list_channels(&cm2);
+                       if (new_channels_2->datalen == 1) {
+                               // Sample getting our counterparty's init features (which used to be hard to do without a memory leak):
+                               const LDK::InitFeatures init_feats = ChannelDetails_get_counterparty_features(&new_channels_2->data[0]);
+                               assert(init_feats->inner != NULL);
+                               break;
+                       }
+                       std::this_thread::yield();
+               }
 
-       while (true) {
-               // Wait for the initial handshakes to complete...
-               LDK::CVec_PublicKeyZ peers_1 = PeerManager_get_peer_node_ids(&net1);
-               LDK::CVec_PublicKeyZ peers_2 = PeerManager_get_peer_node_ids(&net2);
-               if (peers_1->datalen == 1 && peers_2->datalen ==1) { break; }
-               std::this_thread::yield();
-       }
+               LDKEventsProvider ev1 = ChannelManager_as_EventsProvider(&cm1);
+               while (true) {
+                       LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
+                       if (events->datalen == 1) {
+                               assert(events->data[0].tag == LDKEvent_FundingGenerationReady);
+                               assert(events->data[0].funding_generation_ready.user_channel_id == 42);
+                               assert(events->data[0].funding_generation_ready.channel_value_satoshis == 40000);
+                               assert(events->data[0].funding_generation_ready.output_script.datalen == 34);
+                               assert(!memcmp(events->data[0].funding_generation_ready.output_script.data, channel_open_tx + 58, 34));
+                               LDKThirtyTwoBytes txid;
+                               for (int i = 0; i < 32; i++) { txid.data[i] = channel_open_txid[31-i]; }
+                               LDK::OutPoint outp = OutPoint_new(txid, 0);
+                               ChannelManager_funding_transaction_generated(&cm1, &events->data[0].funding_generation_ready.temporary_channel_id.data, std::move(outp));
+                               break;
+                       }
+                       std::this_thread::yield();
+               }
 
-       // Note that we have to bind the result to a C++ class to make sure it gets free'd
-       LDK::CResult_NoneAPIErrorZ res = ChannelManager_create_channel(&cm1, ChannelManager_get_our_node_id(&cm2), 40000, 1000, 42, UserConfig_default());
-       assert(res->result_ok);
-       PeerManager_process_events(&net1);
+               // We observe when the funding signed messages have been exchanged by
+               // waiting for two monitors to be registered.
+               PeerManager_process_events(&net1);
+               while (true) {
+                       LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
+                       if (events->datalen == 1) {
+                               assert(events->data[0].tag == LDKEvent_FundingBroadcastSafe);
+                               assert(events->data[0].funding_broadcast_safe.user_channel_id == 42);
+                               break;
+                       }
+                       std::this_thread::yield();
+               }
 
-       LDK::CVec_ChannelDetailsZ new_channels = ChannelManager_list_channels(&cm1);
-       assert(new_channels->datalen == 1);
-       LDKPublicKey chan_open_pk = ChannelDetails_get_remote_network_id(&new_channels->data[0]);
-       assert(!memcmp(chan_open_pk.compressed_form, ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
-
-       while (true) {
-               LDK::CVec_ChannelDetailsZ new_channels_2 = ChannelManager_list_channels(&cm2);
-               if (new_channels_2->datalen == 1) {
-                       // Sample getting our counterparty's init features (which used to be hard to do without a memory leak):
-                       const LDK::InitFeatures init_feats = ChannelDetails_get_counterparty_features(&new_channels_2->data[0]);
-                       assert(init_feats->inner != NULL);
-                       break;
+               LDKCVec_C2Tuple_usizeTransactionZZ txdata { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
+               *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
+               ChannelManager_block_connected(&cm1, &channel_open_header, txdata, 1);
+
+               txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
+               *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
+               ChannelManager_block_connected(&cm2, &channel_open_header, txdata, 1);
+
+               txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
+               *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
+               mons1.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
+
+               txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
+               *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
+               mons2.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
+
+               ChannelManager_block_connected(&cm1, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
+               ChannelManager_block_connected(&cm2, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
+               mons1.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
+               mons2.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
+
+               ChannelManager_block_connected(&cm1, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
+               ChannelManager_block_connected(&cm2, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
+               mons1.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
+               mons2.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
+
+               PeerManager_process_events(&net1);
+               PeerManager_process_events(&net2);
+
+               // Now send funds from 1 to 2!
+               while (true) {
+                       LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
+                       if (outbound_channels->datalen == 1) {
+                               const LDKChannelDetails *channel = &outbound_channels->data[0];
+                               // Note that the channel ID is the same as the channel txid reversed as the output index is 0
+                               uint8_t expected_chan_id[32];
+                               for (int i = 0; i < 32; i++) { expected_chan_id[i] = channel_open_txid[31-i]; }
+                               assert(!memcmp(ChannelDetails_get_channel_id(channel), expected_chan_id, 32));
+                               assert(!memcmp(ChannelDetails_get_remote_network_id(channel).compressed_form,
+                                               ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
+                               assert(ChannelDetails_get_channel_value_satoshis(channel) == 40000);
+                               // We opened the channel with 1000 push_msat:
+                               assert(ChannelDetails_get_outbound_capacity_msat(channel) == 40000*1000 - 1000);
+                               assert(ChannelDetails_get_inbound_capacity_msat(channel) == 1000);
+                               assert(ChannelDetails_get_is_live(channel));
+                               break;
+                       }
+                       std::this_thread::yield();
                }
-               std::this_thread::yield();
-       }
 
-       LDKEventsProvider ev1 = ChannelManager_as_EventsProvider(&cm1);
-       while (true) {
-               LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
-               if (events->datalen == 1) {
-                       assert(events->data[0].tag == LDKEvent_FundingGenerationReady);
-                       assert(events->data[0].funding_generation_ready.user_channel_id == 42);
-                       assert(events->data[0].funding_generation_ready.channel_value_satoshis == 40000);
-                       assert(events->data[0].funding_generation_ready.output_script.datalen == 34);
-                       assert(!memcmp(events->data[0].funding_generation_ready.output_script.data, channel_open_tx + 58, 34));
-                       LDKThirtyTwoBytes txid;
-                       for (int i = 0; i < 32; i++) { txid.data[i] = channel_open_txid[31-i]; }
-                       LDK::OutPoint outp = OutPoint_new(txid, 0);
-                       ChannelManager_funding_transaction_generated(&cm1, &events->data[0].funding_generation_ready.temporary_channel_id.data, std::move(outp));
-                       break;
+               LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
+               LDKThirtyTwoBytes payment_secret;
+               memset(payment_secret.data, 0x42, 32);
+               {
+                       LDK::LockedNetworkGraph graph_2_locked = NetGraphMsgHandler_read_locked_graph(&net_graph2);
+                       LDK::NetworkGraph graph_2_ref = LockedNetworkGraph_graph(&graph_2_locked);
+                       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 {
+                                       .data = NULL, .datalen = 0
+                               }, 5000, 10, logger1);
+                       assert(route->result_ok);
+                       LDK::CResult_NonePaymentSendFailureZ send_res = ChannelManager_send_payment(&cm1, route->contents.result, payment_hash_1, payment_secret);
+                       assert(send_res->result_ok);
                }
-               std::this_thread::yield();
-       }
 
-       // We observe when the funding signed messages have been exchanged by
-       // waiting for two monitors to be registered.
-       PeerManager_process_events(&net1);
-       while (true) {
-               LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
-               if (events->datalen == 1) {
-                       assert(events->data[0].tag == LDKEvent_FundingBroadcastSafe);
-                       assert(events->data[0].funding_broadcast_safe.user_channel_id == 42);
-                       break;
+               mons_updated = 0;
+               PeerManager_process_events(&net1);
+               while (mons_updated != 4) {
+                       std::this_thread::yield();
                }
-               std::this_thread::yield();
-       }
 
-       LDKCVec_C2Tuple_usizeTransactionZZ txdata { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
-       *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
-       ChannelManager_block_connected(&cm1, &channel_open_header, txdata, 1);
+               // Check that we received the payment!
+               LDKEventsProvider ev2 = ChannelManager_as_EventsProvider(&cm2);
+               while (true) {
+                       LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
+                       if (events->datalen == 1) {
+                               assert(events->data[0].tag == LDKEvent_PendingHTLCsForwardable);
+                               break;
+                       }
+                       std::this_thread::yield();
+               }
+               ChannelManager_process_pending_htlc_forwards(&cm2);
+               PeerManager_process_events(&net2);
+
+               mons_updated = 0;
+               {
+                       LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
+                       assert(events->datalen == 1);
+                       assert(events->data[0].tag == LDKEvent_PaymentReceived);
+                       assert(!memcmp(events->data[0].payment_received.payment_hash.data, payment_hash_1.data, 32));
+                       assert(!memcmp(events->data[0].payment_received.payment_secret.data, payment_secret.data, 32));
+                       assert(events->data[0].payment_received.amt == 5000);
+                       assert(ChannelManager_claim_funds(&cm2, payment_preimage_1, payment_secret, 5000));
+               }
+               PeerManager_process_events(&net2);
+               // Wait until we've passed through a full set of monitor updates (ie new preimage + CS/RAA messages)
+               while (mons_updated != 5) {
+                       std::this_thread::yield();
+               }
+               {
+                       LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
+                       assert(events->datalen == 1);
+                       assert(events->data[0].tag == LDKEvent_PaymentSent);
+                       assert(!memcmp(events->data[0].payment_sent.payment_preimage.data, payment_preimage_1.data, 32));
+               }
 
-       txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
-       *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
-       ChannelManager_block_connected(&cm2, &channel_open_header, txdata, 1);
+               conn.stop();
 
-       txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
-       *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
-       mons1.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
+               cm1_ser = ChannelManager_write(&cm1);
+               cm2_ser = ChannelManager_write(&cm2);
+       }
 
-       txdata = LDKCVec_C2Tuple_usizeTransactionZZ { .data = (LDKC2TupleTempl_usize__Transaction*)malloc(sizeof(LDKC2Tuple_usizeTransactionZ)), .datalen = 1 };
-       *txdata.data = C2Tuple_usizeTransactionZ_new(0, LDKTransaction { .data = (uint8_t*)channel_open_tx, .datalen = sizeof(channel_open_tx), .data_is_owned = false });
-       mons2.ConnectBlock(&channel_open_header, 1, txdata, broadcast, fee_est);
+       LDK::CVec_ChannelMonitorZ mons_list1 = LDKCVec_ChannelMonitorZ { .data = (LDKChannelMonitor*)malloc(sizeof(LDKChannelMonitor)), .datalen = 1 };
+       assert(mons1.mons.size() == 1);
+       mons_list1->data[0] = *& std::get<1>(mons1.mons[0]); // Note that we need a reference, thus need a raw clone here, which *& does.
+       mons_list1->data[0].is_owned = false; // XXX: God this sucks
+       uint8_t node_seed[32];
+       memset(&node_seed, 0, 32);
+       LDK::KeysManager keys1 = KeysManager_new(&node_seed, network, 1, 0);
+       LDK::KeysInterface keys_source1 = KeysManager_as_KeysInterface(&keys1);
 
-       ChannelManager_block_connected(&cm1, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
-       ChannelManager_block_connected(&cm2, &header_1, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 2);
-       mons1.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
-       mons2.ConnectBlock(&header_1, 2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
+       LDK::ChannelManagerReadArgs cm1_args = ChannelManagerReadArgs_new(KeysManager_as_KeysInterface(&keys1), fee_est, mon1, broadcast, logger1, UserConfig_default(), std::move(mons_list1));
+       LDK::CResult_C2Tuple_BlockHashChannelManagerZDecodeErrorZ cm1_read =
+               C2Tuple_BlockHashChannelManagerZ_read(LDKu8slice { .data = cm1_ser->data, .datalen = cm1_ser -> datalen}, std::move(cm1_args));
+       assert(cm1_read->result_ok);
+       LDK::ChannelManager cm1(std::move(cm1_read->contents.result->b));
 
-       ChannelManager_block_connected(&cm1, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
-       ChannelManager_block_connected(&cm2, &header_2, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, 3);
-       mons1.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
-       mons2.ConnectBlock(&header_2, 3, LDKCVec_C2Tuple_usizeTransactionZZ { .data = NULL, .datalen = 0 }, broadcast, fee_est);
+       LDK::CVec_ChannelMonitorZ mons_list2 = LDKCVec_ChannelMonitorZ { .data = (LDKChannelMonitor*)malloc(sizeof(LDKChannelMonitor)), .datalen = 1 };
+       assert(mons2.mons.size() == 1);
+       mons_list2->data[0] = *& std::get<1>(mons2.mons[0]); // Note that we need a reference, thus need a raw clone here, which *& does.
+       mons_list2->data[0].is_owned = false; // XXX: God this sucks
+       memset(&node_seed, 1, 32);
+       LDK::KeysManager keys2 = KeysManager_new(&node_seed, network, 1, 0);
 
-       PeerManager_process_events(&net1);
-       PeerManager_process_events(&net2);
+       LDK::ChannelManagerReadArgs cm2_args = ChannelManagerReadArgs_new(KeysManager_as_KeysInterface(&keys2), fee_est, mon2, broadcast, logger2, UserConfig_default(), std::move(mons_list2));
+       LDK::CResult_C2Tuple_BlockHashChannelManagerZDecodeErrorZ cm2_read =
+               C2Tuple_BlockHashChannelManagerZ_read(LDKu8slice { .data = cm2_ser->data, .datalen = cm2_ser -> datalen}, std::move(cm2_args));
+       assert(cm2_read->result_ok);
+       LDK::ChannelManager cm2(std::move(cm2_read->contents.result->b));
 
-       // Now send funds from 1 to 2!
-       while (true) {
-               LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
-               if (outbound_channels->datalen == 1) {
-                       const LDKChannelDetails *channel = &outbound_channels->data[0];
-                       // Note that the channel ID is the same as the channel txid reversed as the output index is 0
-                       uint8_t expected_chan_id[32];
-                       for (int i = 0; i < 32; i++) { expected_chan_id[i] = channel_open_txid[31-i]; }
-                       assert(!memcmp(ChannelDetails_get_channel_id(channel), expected_chan_id, 32));
-                       assert(!memcmp(ChannelDetails_get_remote_network_id(channel).compressed_form,
-                                       ChannelManager_get_our_node_id(&cm2).compressed_form, 33));
-                       assert(ChannelDetails_get_channel_value_satoshis(channel) == 40000);
-                       // We opened the channel with 1000 push_msat:
-                       assert(ChannelDetails_get_outbound_capacity_msat(channel) == 40000*1000 - 1000);
-                       assert(ChannelDetails_get_inbound_capacity_msat(channel) == 1000);
-                       assert(ChannelDetails_get_is_live(channel));
-                       break;
-               }
-               std::this_thread::yield();
-       }
+       // Attempt to close the channel...
+       uint8_t chan_id[32];
+       for (int i = 0; i < 32; i++) { chan_id[i] = channel_open_txid[31-i]; }
+       LDK::CResult_NoneAPIErrorZ close_res = ChannelManager_close_channel(&cm1, &chan_id);
+       assert(!close_res->result_ok); // Note that we can't close while disconnected!
 
-       LDK::CVec_ChannelDetailsZ outbound_channels = ChannelManager_list_usable_channels(&cm1);
-       LDKThirtyTwoBytes payment_secret;
-       memset(payment_secret.data, 0x42, 32);
-       {
-               LDK::LockedNetworkGraph graph_2_locked = NetGraphMsgHandler_read_locked_graph(&net_graph2);
-               LDK::NetworkGraph graph_2_ref = LockedNetworkGraph_graph(&graph_2_locked);
-               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 {
-                               .data = NULL, .datalen = 0
-                       }, 5000, 10, logger1);
-               assert(route->result_ok);
-               LDK::CResult_NonePaymentSendFailureZ send_res = ChannelManager_send_payment(&cm1, route->contents.result, payment_hash_1, payment_secret);
-               assert(send_res->result_ok);
-       }
+       // Open a connection!
+       LDK::MessageHandler msg_handler1 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm1), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph1));
+       random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
+       LDK::PeerManager net1 = PeerManager_new(std::move(msg_handler1), node_secret1, &random_bytes.data, logger1);
 
-       mons_updated = 0;
-       PeerManager_process_events(&net1);
-       while (mons_updated != 4) {
-               std::this_thread::yield();
-       }
+       LDK::MessageHandler msg_handler2 = MessageHandler_new(ChannelManager_as_ChannelMessageHandler(&cm2), NetGraphMsgHandler_as_RoutingMessageHandler(&net_graph2));
+       random_bytes = keys_source1->get_secure_random_bytes(keys_source1->this_arg);
+       LDK::PeerManager net2 = PeerManager_new(std::move(msg_handler2), node_secret2, &random_bytes.data, logger2);
 
-       // Check that we received the payment!
-       LDKEventsProvider ev2 = ChannelManager_as_EventsProvider(&cm2);
-       while (true) {
-               LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
-               if (events->datalen == 1) {
-                       assert(events->data[0].tag == LDKEvent_PendingHTLCsForwardable);
-                       break;
-               }
-               std::this_thread::yield();
-       }
-       ChannelManager_process_pending_htlc_forwards(&cm2);
-       PeerManager_process_events(&net2);
-
-       mons_updated = 0;
-       {
-               LDK::CVec_EventZ events = ev2.get_and_clear_pending_events(ev2.this_arg);
-               assert(events->datalen == 1);
-               assert(events->data[0].tag == LDKEvent_PaymentReceived);
-               assert(!memcmp(events->data[0].payment_received.payment_hash.data, payment_hash_1.data, 32));
-               assert(!memcmp(events->data[0].payment_received.payment_secret.data, payment_secret.data, 32));
-               assert(events->data[0].payment_received.amt == 5000);
-               assert(ChannelManager_claim_funds(&cm2, payment_preimage_1, payment_secret, 5000));
-       }
-       PeerManager_process_events(&net2);
-       // Wait until we've passed through a full set of monitor updates (ie new preimage + CS/RAA messages)
-       while (mons_updated != 5) {
-               std::this_thread::yield();
-       }
-       {
-               LDK::CVec_EventZ events = ev1.get_and_clear_pending_events(ev1.this_arg);
-               assert(events->datalen == 1);
-               assert(events->data[0].tag == LDKEvent_PaymentSent);
-               assert(!memcmp(events->data[0].payment_sent.payment_preimage.data, payment_preimage_1.data, 32));
-       }
+       PeersConnection conn(cm1, cm2, net1, net2);
 
-       // Close the channel.
-       uint8_t chan_id[32];
-       for (int i = 0; i < 32; i++) { chan_id[i] = channel_open_txid[31-i]; }
-       LDK::CResult_NoneAPIErrorZ close_res = ChannelManager_close_channel(&cm1, &chan_id);
+       // Actually close the channel
+       close_res = ChannelManager_close_channel(&cm1, &chan_id);
        assert(close_res->result_ok);
        PeerManager_process_events(&net1);
        num_txs_broadcasted = 0;
@@ -542,12 +618,7 @@ int main() {
        LDK::CVec_ChannelDetailsZ chans_after_close2 = ChannelManager_list_channels(&cm2);
        assert(chans_after_close2->datalen == 0);
 
-       close(pipefds_1_to_2[0]);
-       close(pipefds_2_to_1[0]);
-       close(pipefds_1_to_2[1]);
-       close(pipefds_2_to_1[1]);
-       t1.join();
-       t2.join();
+       conn.stop();
 
        // Few extra random tests:
        LDKSecretKey sk;