_ Git - ldk-java/blob - c_sharp/src/org/ldk/structs/PeerManager.cs

   1 using org.ldk.impl;
   2 using org.ldk.enums;
   3 using org.ldk.util;
   4 using System;
   5
   6 namespace org { namespace ldk { namespace structs {
   7
   8
   9 /**
  10  * A PeerManager manages a set of peers, described by their [`SocketDescriptor`] and marshalls
  11  * socket events into messages which it passes on to its [`MessageHandler`].
  12  *
  13  * Locks are taken internally, so you must never assume that reentrancy from a
  14  * [`SocketDescriptor`] call back into [`PeerManager`] methods will not deadlock.
  15  *
  16  * Calls to [`read_event`] will decode relevant messages and pass them to the
  17  * [`ChannelMessageHandler`], likely doing message processing in-line. Thus, the primary form of
  18  * parallelism in Rust-Lightning is in calls to [`read_event`]. Note, however, that calls to any
  19  * [`PeerManager`] functions related to the same connection must occur only in serial, making new
  20  * calls only after previous ones have returned.
  21  *
  22  * Rather than using a plain [`PeerManager`], it is preferable to use either a [`SimpleArcPeerManager`]
  23  * a [`SimpleRefPeerManager`], for conciseness. See their documentation for more details, but
  24  * essentially you should default to using a [`SimpleRefPeerManager`], and use a
  25  * [`SimpleArcPeerManager`] when you require a `PeerManager` with a static lifetime, such as when
  26  * you're using lightning-net-tokio.
  27  *
  28  * [`read_event`]: PeerManager::read_event
  29  */
  30 public class PeerManager : CommonBase {
  31         internal PeerManager(object _dummy, long ptr) : base(ptr) { }
  32         ~PeerManager() {
  33                 if (ptr != 0) { bindings.PeerManager_free(ptr); }
  34         }
  35
  36         /**
  37          * Constructs a new `PeerManager` with the given message handlers.
  38          *
  39          * `ephemeral_random_data` is used to derive per-connection ephemeral keys and must be
  40          * cryptographically secure random bytes.
  41          *
  42          * `current_time` is used as an always-increasing counter that survives across restarts and is
  43          * incremented irregularly internally. In general it is best to simply use the current UNIX
  44          * timestamp, however if it is not available a persistent counter that increases once per
  45          * minute should suffice.
  46          */
  47         public static PeerManager of(ChannelMessageHandler message_handler_chan_handler_arg, RoutingMessageHandler message_handler_route_handler_arg, OnionMessageHandler message_handler_onion_message_handler_arg, CustomMessageHandler message_handler_custom_message_handler_arg, int current_time, byte[] ephemeral_random_data, org.ldk.structs.Logger logger, org.ldk.structs.NodeSigner node_signer) {
  48                 long ret = bindings.PeerManager_new(bindings.MessageHandler_new(message_handler_chan_handler_arg.ptr, message_handler_route_handler_arg.ptr, message_handler_onion_message_handler_arg.ptr, message_handler_custom_message_handler_arg.ptr), current_time, InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(ephemeral_random_data, 32)), logger.ptr, node_signer.ptr);
  49                 GC.KeepAlive(message_handler_chan_handler_arg);
  50                 GC.KeepAlive(message_handler_route_handler_arg);
  51                 GC.KeepAlive(message_handler_onion_message_handler_arg);
  52                 GC.KeepAlive(message_handler_custom_message_handler_arg);
  53                 GC.KeepAlive(current_time);
  54                 GC.KeepAlive(ephemeral_random_data);
  55                 GC.KeepAlive(logger);
  56                 GC.KeepAlive(node_signer);
  57                 if (ret >= 0 && ret <= 4096) { return null; }
  58                 org.ldk.structs.PeerManager ret_hu_conv = null; if (ret < 0 || ret > 4096) { ret_hu_conv = new org.ldk.structs.PeerManager(null, ret); }
  59                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(ret_hu_conv); };
  60                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(message_handler_chan_handler_arg); };
  61                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(message_handler_route_handler_arg); };
  62                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(message_handler_onion_message_handler_arg); };
  63                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(message_handler_custom_message_handler_arg); };
  64                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(logger); };
  65                 if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(node_signer); };
  66                 return ret_hu_conv;
  67         }
  68
  69         /**
  70          * Get a list of tuples mapping from node id to network addresses for peers which have
  71          * completed the initial handshake.
  72          *
  73          * For outbound connections, the [`PublicKey`] will be the same as the `their_node_id` parameter
  74          * passed in to [`Self::new_outbound_connection`], however entries will only appear once the initial
  75          * handshake has completed and we are sure the remote peer has the private key for the given
  76          * [`PublicKey`].
  77          *
  78          * The returned `Option`s will only be `Some` if an address had been previously given via
  79          * [`Self::new_outbound_connection`] or [`Self::new_inbound_connection`].
  80          */
  81         public TwoTuple_PublicKeyCOption_SocketAddressZZ[] get_peer_node_ids() {
  82                 long ret = bindings.PeerManager_get_peer_node_ids(this.ptr);
  83                 GC.KeepAlive(this);
  84                 if (ret >= 0 && ret <= 4096) { return null; }
  85                 int ret_conv_43_len = InternalUtils.getArrayLength(ret);
  86                 TwoTuple_PublicKeyCOption_SocketAddressZZ[] ret_conv_43_arr = new TwoTuple_PublicKeyCOption_SocketAddressZZ[ret_conv_43_len];
  87                 for (int r = 0; r < ret_conv_43_len; r++) {
  88                         long ret_conv_43 = InternalUtils.getU64ArrayElem(ret, r);
  89                         TwoTuple_PublicKeyCOption_SocketAddressZZ ret_conv_43_hu_conv = new TwoTuple_PublicKeyCOption_SocketAddressZZ(null, ret_conv_43);
  90                         if (ret_conv_43_hu_conv != null) { ret_conv_43_hu_conv.ptrs_to.AddLast(this); };
  91                         ret_conv_43_arr[r] = ret_conv_43_hu_conv;
  92                 }
  93                 bindings.free_buffer(ret);
  94                 return ret_conv_43_arr;
  95         }
  96
  97         /**
  98          * Indicates a new outbound connection has been established to a node with the given `node_id`
  99          * and an optional remote network address.
 100          *
 101          * The remote network address adds the option to report a remote IP address back to a connecting
 102          * peer using the init message.
 103          * The user should pass the remote network address of the host they are connected to.
 104          *
 105          * If an `Err` is returned here you must disconnect the connection immediately.
 106          *
 107          * Returns a small number of bytes to send to the remote node (currently always 50).
 108          *
 109          * Panics if descriptor is duplicative with some other descriptor which has not yet been
 110          * [`socket_disconnected`].
 111          *
 112          * [`socket_disconnected`]: PeerManager::socket_disconnected
 113          */
 114         public Result_CVec_u8ZPeerHandleErrorZ new_outbound_connection(byte[] their_node_id, org.ldk.structs.SocketDescriptor descriptor, org.ldk.structs.Option_SocketAddressZ remote_network_address) {
 115                 long ret = bindings.PeerManager_new_outbound_connection(this.ptr, InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(their_node_id, 33)), descriptor.ptr, remote_network_address.ptr);
 116                 GC.KeepAlive(this);
 117                 GC.KeepAlive(their_node_id);
 118                 GC.KeepAlive(descriptor);
 119                 GC.KeepAlive(remote_network_address);
 120                 if (ret >= 0 && ret <= 4096) { return null; }
 121                 Result_CVec_u8ZPeerHandleErrorZ ret_hu_conv = Result_CVec_u8ZPeerHandleErrorZ.constr_from_ptr(ret);
 122                 if (this != null) { this.ptrs_to.AddLast(descriptor); };
 123                 if (this != null) { this.ptrs_to.AddLast(remote_network_address); };
 124                 return ret_hu_conv;
 125         }
 126
 127         /**
 128          * Indicates a new inbound connection has been established to a node with an optional remote
 129          * network address.
 130          *
 131          * The remote network address adds the option to report a remote IP address back to a connecting
 132          * peer using the init message.
 133          * The user should pass the remote network address of the host they are connected to.
 134          *
 135          * May refuse the connection by returning an Err, but will never write bytes to the remote end
 136          * (outbound connector always speaks first). If an `Err` is returned here you must disconnect
 137          * the connection immediately.
 138          *
 139          * Panics if descriptor is duplicative with some other descriptor which has not yet been
 140          * [`socket_disconnected`].
 141          *
 142          * [`socket_disconnected`]: PeerManager::socket_disconnected
 143          */
 144         public Result_NonePeerHandleErrorZ new_inbound_connection(org.ldk.structs.SocketDescriptor descriptor, org.ldk.structs.Option_SocketAddressZ remote_network_address) {
 145                 long ret = bindings.PeerManager_new_inbound_connection(this.ptr, descriptor.ptr, remote_network_address.ptr);
 146                 GC.KeepAlive(this);
 147                 GC.KeepAlive(descriptor);
 148                 GC.KeepAlive(remote_network_address);
 149                 if (ret >= 0 && ret <= 4096) { return null; }
 150                 Result_NonePeerHandleErrorZ ret_hu_conv = Result_NonePeerHandleErrorZ.constr_from_ptr(ret);
 151                 if (this != null) { this.ptrs_to.AddLast(descriptor); };
 152                 if (this != null) { this.ptrs_to.AddLast(remote_network_address); };
 153                 return ret_hu_conv;
 154         }
 155
 156         /**
 157          * Indicates that there is room to write data to the given socket descriptor.
 158          *
 159          * May return an Err to indicate that the connection should be closed.
 160          *
 161          * May call [`send_data`] on the descriptor passed in (or an equal descriptor) before
 162          * returning. Thus, be very careful with reentrancy issues! The invariants around calling
 163          * [`write_buffer_space_avail`] in case a write did not fully complete must still hold - be
 164          * ready to call [`write_buffer_space_avail`] again if a write call generated here isn't
 165          * sufficient!
 166          *
 167          * [`send_data`]: SocketDescriptor::send_data
 168          * [`write_buffer_space_avail`]: PeerManager::write_buffer_space_avail
 169          */
 170         public Result_NonePeerHandleErrorZ write_buffer_space_avail(org.ldk.structs.SocketDescriptor descriptor) {
 171                 long ret = bindings.PeerManager_write_buffer_space_avail(this.ptr, descriptor.ptr);
 172                 GC.KeepAlive(this);
 173                 GC.KeepAlive(descriptor);
 174                 if (ret >= 0 && ret <= 4096) { return null; }
 175                 Result_NonePeerHandleErrorZ ret_hu_conv = Result_NonePeerHandleErrorZ.constr_from_ptr(ret);
 176                 return ret_hu_conv;
 177         }
 178
 179         /**
 180          * Indicates that data was read from the given socket descriptor.
 181          *
 182          * May return an Err to indicate that the connection should be closed.
 183          *
 184          * Will *not* call back into [`send_data`] on any descriptors to avoid reentrancy complexity.
 185          * Thus, however, you should call [`process_events`] after any `read_event` to generate
 186          * [`send_data`] calls to handle responses.
 187          *
 188          * If `Ok(true)` is returned, further read_events should not be triggered until a
 189          * [`send_data`] call on this descriptor has `resume_read` set (preventing DoS issues in the
 190          * send buffer).
 191          *
 192          * In order to avoid processing too many messages at once per peer, `data` should be on the
 193          * order of 4KiB.
 194          *
 195          * [`send_data`]: SocketDescriptor::send_data
 196          * [`process_events`]: PeerManager::process_events
 197          */
 198         public Result_boolPeerHandleErrorZ read_event(org.ldk.structs.SocketDescriptor peer_descriptor, byte[] data) {
 199                 long ret = bindings.PeerManager_read_event(this.ptr, peer_descriptor.ptr, InternalUtils.encodeUint8Array(data));
 200                 GC.KeepAlive(this);
 201                 GC.KeepAlive(peer_descriptor);
 202                 GC.KeepAlive(data);
 203                 if (ret >= 0 && ret <= 4096) { return null; }
 204                 Result_boolPeerHandleErrorZ ret_hu_conv = Result_boolPeerHandleErrorZ.constr_from_ptr(ret);
 205                 return ret_hu_conv;
 206         }
 207
 208         /**
 209          * Checks for any events generated by our handlers and processes them. Includes sending most
 210          * response messages as well as messages generated by calls to handler functions directly (eg
 211          * functions like [`ChannelManager::process_pending_htlc_forwards`] or [`send_payment`]).
 212          *
 213          * May call [`send_data`] on [`SocketDescriptor`]s. Thus, be very careful with reentrancy
 214          * issues!
 215          *
 216          * You don't have to call this function explicitly if you are using [`lightning-net-tokio`]
 217          * or one of the other clients provided in our language bindings.
 218          *
 219          * Note that if there are any other calls to this function waiting on lock(s) this may return
 220          * without doing any work. All available events that need handling will be handled before the
 221          * other calls return.
 222          *
 223          * [`send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
 224          * [`ChannelManager::process_pending_htlc_forwards`]: crate::ln::channelmanager::ChannelManager::process_pending_htlc_forwards
 225          * [`send_data`]: SocketDescriptor::send_data
 226          */
 227         public void process_events() {
 228                 bindings.PeerManager_process_events(this.ptr);
 229                 GC.KeepAlive(this);
 230         }
 231
 232         /**
 233          * Indicates that the given socket descriptor's connection is now closed.
 234          */
 235         public void socket_disconnected(org.ldk.structs.SocketDescriptor descriptor) {
 236                 bindings.PeerManager_socket_disconnected(this.ptr, descriptor.ptr);
 237                 GC.KeepAlive(this);
 238                 GC.KeepAlive(descriptor);
 239         }
 240
 241         /**
 242          * Disconnect a peer given its node id.
 243          *
 244          * If a peer is connected, this will call [`disconnect_socket`] on the descriptor for the
 245          * peer. Thus, be very careful about reentrancy issues.
 246          *
 247          * [`disconnect_socket`]: SocketDescriptor::disconnect_socket
 248          */
 249         public void disconnect_by_node_id(byte[] node_id) {
 250                 bindings.PeerManager_disconnect_by_node_id(this.ptr, InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(node_id, 33)));
 251                 GC.KeepAlive(this);
 252                 GC.KeepAlive(node_id);
 253         }
 254
 255         /**
 256          * Disconnects all currently-connected peers. This is useful on platforms where there may be
 257          * an indication that TCP sockets have stalled even if we weren't around to time them out
 258          * using regular ping/pongs.
 259          */
 260         public void disconnect_all_peers() {
 261                 bindings.PeerManager_disconnect_all_peers(this.ptr);
 262                 GC.KeepAlive(this);
 263         }
 264
 265         /**
 266          * Send pings to each peer and disconnect those which did not respond to the last round of
 267          * pings.
 268          *
 269          * This may be called on any timescale you want, however, roughly once every ten seconds is
 270          * preferred. The call rate determines both how often we send a ping to our peers and how much
 271          * time they have to respond before we disconnect them.
 272          *
 273          * May call [`send_data`] on all [`SocketDescriptor`]s. Thus, be very careful with reentrancy
 274          * issues!
 275          *
 276          * [`send_data`]: SocketDescriptor::send_data
 277          */
 278         public void timer_tick_occurred() {
 279                 bindings.PeerManager_timer_tick_occurred(this.ptr);
 280                 GC.KeepAlive(this);
 281         }
 282
 283         /**
 284          * Generates a signed node_announcement from the given arguments, sending it to all connected
 285          * peers. Note that peers will likely ignore this message unless we have at least one public
 286          * channel which has at least six confirmations on-chain.
 287          *
 288          * `rgb` is a node \"color\" and `alias` is a printable human-readable string to describe this
 289          * node to humans. They carry no in-protocol meaning.
 290          *
 291          * `addresses` represent the set (possibly empty) of socket addresses on which this node
 292          * accepts incoming connections. These will be included in the node_announcement, publicly
 293          * tying these addresses together and to this node. If you wish to preserve user privacy,
 294          * addresses should likely contain only Tor Onion addresses.
 295          *
 296          * Panics if `addresses` is absurdly large (more than 100).
 297          *
 298          * [`get_and_clear_pending_msg_events`]: MessageSendEventsProvider::get_and_clear_pending_msg_events
 299          */
 300         public void broadcast_node_announcement(byte[] rgb, byte[] alias, SocketAddress[] addresses) {
 301                 bindings.PeerManager_broadcast_node_announcement(this.ptr, InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(rgb, 3)), InternalUtils.encodeUint8Array(InternalUtils.check_arr_len(alias, 32)), InternalUtils.encodeUint64Array(InternalUtils.mapArray(addresses, addresses_conv_15 => addresses_conv_15.ptr)));
 302                 GC.KeepAlive(this);
 303                 GC.KeepAlive(rgb);
 304                 GC.KeepAlive(alias);
 305                 GC.KeepAlive(addresses);
 306                 foreach (SocketAddress addresses_conv_15 in addresses) { if (this != null) { this.ptrs_to.AddLast(addresses_conv_15); }; };
 307         }
 308
 309 }
 310 } } }