@node-lightning/wire

<!doctype html> <html lang="en"> <head> <title>Code coverage report for lib/gossip-old/GossipRelay.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../../index.html">All files</a> / <a href="index.html">lib/gossip-old</a> GossipRelay.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 9.88% Statements 8/81 </div> <div class='fl pad1y space-right2'> 5.13% Branches 2/39 </div> <div class='fl pad1y space-right2'> 5.88% Functions 1/17 </div> <div class='fl pad1y space-right2'> 10.53% Lines 8/76 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. </div> <div class='status-line low'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a href='#L13'>13</a> <a name='L14'></a><a href='#L14'>14</a> <a name='L15'></a><a href='#L15'>15</a> <a name='L16'></a><a href='#L16'>16</a> <a name='L17'></a><a href='#L17'>17</a> <a name='L18'></a><a href='#L18'>18</a> <a name='L19'></a><a href='#L19'>19</a> <a name='L20'></a><a href='#L20'>20</a> <a name='L21'></a><a href='#L21'>21</a> <a name='L22'></a><a href='#L22'>22</a> <a 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ChannelUpdateChannelFlags } from "../flags/ChanneUpdateChannelFlags"; import { ChannelAnnouncementMessage } from "../messages/ChannelAnnouncementMessage"; import { ChannelUpdateMessage } from "../messages/ChannelUpdateMessage"; import { IWireMessage } from "../messages/IWireMessage"; import { NodeAnnouncementMessage } from "../messages/NodeAnnouncementMessage"; import { IPeer } from "../Peer";   /** * Interface for the sub-system for handling the gossip message relay, * also known as rumor mongering.This system is responsible for * periodically flushing messages to connected peers and makes a best * effort to not send message that have already been sent to a peer. * * The idea of rumor mongering is that a piece of information is hot. A * node attempts to infect connected peers with this information by * sending it to them. Once it has been sent, we no longer need to * infect them with information. */ export interface IGossipRelay { /** * The current state of gossip relay */ state: GossipRelayState;   /** * Starts gossip relay */ start(): void;   /** * Stops gossip relay */ stop(): void;   /** * Adds a new peer to relay messages to * @param peer */ addPeer(peer: IPeer): void;   /** * Removes the peer from relay * @param peer */ removePeer(peer: IPeer): void;   /** * Enqueues a message to be broadcast to peers * @param msg */ enqueue(msg: IWireMessage): void; }   /** * The state of a IGossipRelay rumor mongerer */ export enum GossipRelayState { /** * Rumor mongering is not active */ Inactive,   /** * Rumor mongering is active */ Active, }   /** * This is a basic implementation of IGossipRelay that enques all * messages and maintaining an index of each peer in the queue. When * messages are flushed, only messages that haven't been sent to a peer * are sent and the index position for that peer is updated. When the * queue of messages has reached a maximum length, older messages are * pruned and the index positions are updated. */ export class GossipRelay { private _queue: IWireMessage[]; private _peers: Map<IPeer, number>; private _timer: NodeJS.Timeout; private _state: GossipRelayState;   constructor( readonly logger: ILogger, readonly relayPeriodMs = 60000, readonly maxQueueLen = 10000, ) { this._peers = new Map() as Map<IPeer, number>; this._queue = []; this._state = GossipRelayState.Inactive; }   /** * Gets the current state of gossip relay */ public get state(): GossipRelayState { return this._state; }   /** * Starts relay to peers. This enables messages to be enqueued and * periodically sent to the peers. */ public start() { if (this._state === GossipRelayState.Active) return; this.logger.info("starting gossip relay for all peers"); this._state = GossipRelayState.Active; // eslint-disable-next-line @typescript-eslint/no-implied-eval this._timer = setInterval(this._onTimer.bind(this), this.relayPeriodMs); }   /** * Stops relay to peers. */ public stop() { if (this._state === GossipRelayState.Inactive) return; this.logger.info("stopping gossip relay for all peers"); clearTimeout(this._timer); this._state = GossipRelayState.Inactive; }   /** * Adds a new peer to relay messages to * @param peer */ public addPeer(peer: IPeer) { this._peers.set(peer, this._queue.length); }   /** * Removes the peer from relay * @param peer */ public removePeer(peer: IPeer) { this._peers.delete(peer); }   /** * Enqueues a message to be broadcast to peers. * @param msg */ public enqueue(msg: IWireMessage) { if (this.state !== GossipRelayState.Active) return;   // For chan_ann messages there is never an update so we only // need to check if the chan_ann exists and add it if it doesn't if (msg instanceof ChannelAnnouncementMessage) { const existing = this._findChanAnn(msg.shortChannelId);   // adds to the queue if there is no existing message if (!existing) { this.logger.trace("adding channel_announcement", msg.shortChannelId.toString()); this._queue.push(msg); return; } }   // For chan_update messages we will add messages that don't exist // or update an existing update message if one already exists if (msg instanceof ChannelUpdateMessage) { const existing = this._findChanUpd( msg.shortChannelId, msg.channelFlags.isSet(ChannelUpdateChannelFlags.direction), );   // Adds to the queue if there is no existing message if (!existing) { this.logger.trace( "adding channel_update", msg.shortChannelId.toString(), msg.channelFlags.isSet(ChannelUpdateChannelFlags.direction), ); this._queue.push(msg); return; }   // Removes the existing message and replaces with a newer // message by adding the new message to the back of the queue if (existing && existing.timestamp < msg.timestamp) { this.logger.trace( "updating channel_update", msg.shortChannelId.toString(), msg.channelFlags.isSet(ChannelUpdateChannelFlags.direction), ); const idx = this._queue.indexOf(existing); this._queue.splice(idx, 1); this._queue.push(msg); return; } }   // For node_ann messages we look for the existing messages and // abort if the new msg is older than the current node_ann we // have in the message queue. if (msg instanceof NodeAnnouncementMessage) { const existing = this._findNodeAnn(msg.nodeId);   // Adds to the queue if there is no existing message if (!existing) { this.logger.trace("adding node_announcement", msg.nodeId.toString("hex")); this._queue.push(msg); return; }   // Removes the existing message and replaces with a newer // message by adding the new message to the back of the queue if (existing && existing.timestamp < msg.timestamp) { this.logger.trace("updating node_announcement", msg.nodeId.toString("hex")); const idx = this._queue.indexOf(existing); this._queue.splice(idx, 1); this._queue.push(msg); return; } } }   /** * Finds a channel_announcement message based on the short_channel_id * @param scid */ private _findChanAnn(scid: ShortChannelId): ChannelAnnouncementMessage { return this._queue.find( p => p instanceof ChannelAnnouncementMessage && p.shortChannelId.toNumber() === scid.toNumber(), ) as ChannelAnnouncementMessage; }   /** * Finds a channel_update message based on the short_channel_id and * direction. The found message can then be compared to an inbound * message to determine if the new message is newer. * @param scid * @param direction */ private _findChanUpd(scid: ShortChannelId, direction: boolean): ChannelUpdateMessage { return this._queue.find( p => p instanceof ChannelUpdateMessage && p.shortChannelId.toNumber() === scid.toNumber() && p.channelFlags.isSet(ChannelUpdateChannelFlags.direction) === direction, ) as ChannelUpdateMessage; }   /** * Finds a node_announcement message based on the node_id. The * returned message can be compared to newer messages using the * timestamp. * @param nodeId */ private _findNodeAnn(nodeId: Buffer): NodeAnnouncementMessage { return this._queue.find( p => p instanceof NodeAnnouncementMessage && p.nodeId.equals(nodeId), ) as NodeAnnouncementMessage; }   /** * Fires when the timer ticks and will flush messages to peers and * prune the queue */ private _onTimer() { this.logger.debug(`periodic flush, ${this._peers.size} peers, ${this._queue.length} hot messages`); // prettier-ignore for (const peer of this._peers.keys()) { this._flushToPeer(peer); }   this._pruneQueue(); }   /** * Flushes message to a peer based on the index of messages that * the peer has received. * @param peer */ private _flushToPeer(peer: IPeer) { for (let i = this._peers.get(peer); i < this._queue.length; i++) { const message = this._queue[i]; peer.sendMessage(message); this._peers.set(peer, this._queue.length); } }   /** * Prunes excess message */ private _pruneQueue() { // calculate the delete count based on the current queue length // and the max allowed queue length const deleteCount = Math.max(0, this._queue.length - this.maxQueueLen);   // do nothing if we don't need to prune any items if (deleteCount === 0) return;   // pruning the excess items from the start of the queue this._queue.splice(0, deleteCount);   // adjust all of the peers by reducing their index position by // the delete count for (const [peer, index] of this._peers.entries()) { this._peers.set(peer, index - deleteCount); }   this.logger.debug(`pruned ${deleteCount} old messages`); } }  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Mon Oct 03 2022 18:24:37 GMT-0400 (Eastern Daylight Time) </div> </div> <script src="../../prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="../../sorter.js"></script> <script src="../../block-navigation.js"></script> </body> </html>