@node-lightning/wire
Version:
Lightning Network Wire Protocol
75 lines • 3.08 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.GossipQueriesReceiver = exports.GossipQueriesReceiverState = void 0;
const GossipTimestampFilterMessage_1 = require("../messages/GossipTimestampFilterMessage");
var GossipQueriesReceiverState;
(function (GossipQueriesReceiverState) {
GossipQueriesReceiverState[GossipQueriesReceiverState["Idle"] = 0] = "Idle";
GossipQueriesReceiverState[GossipQueriesReceiverState["Receiving"] = 1] = "Receiving";
})(GossipQueriesReceiverState = exports.GossipQueriesReceiverState || (exports.GossipQueriesReceiverState = {}));
/**
* This class is used to activate / deactivate receiving of gossip messages
* when the gossip_queries or gossip_queries_ex gossip sync strategies are used.
*/
class GossipQueriesReceiver {
constructor(chainHash, peer, logger) {
this.chainHash = chainHash;
this.peer = peer;
this.logger = logger;
this._state = GossipQueriesReceiverState.Idle;
this._firstTimestamp = 0xffffffff;
this._timestampRange = 0;
}
get state() {
return this._state;
}
get firstTimestamp() {
return this._firstTimestamp;
}
get timestampRange() {
return this._timestampRange;
}
/**
* Deactivates gossip with the remote peer by sending a
* gossip_timestamp_filter message that disables broadcast. In particular this
* message will use a first_timestamp of uint32_max and a timestamp_range of
* 0 to prevent the remote peer from sending information.
*/
deactivate() {
this.logger.info("deactivating gossip");
// reset params
this._firstTimestamp = 0xffffffff;
this._timestampRange = 0;
// send message
const msg = new GossipTimestampFilterMessage_1.GossipTimestampFilterMessage();
msg.chainHash = this.chainHash;
msg.firstTimestamp = 0xffffffff;
msg.timestampRange = 0;
this.peer.sendMessage(msg);
// change state
this._state = GossipQueriesReceiverState.Idle;
}
/**
* Activates gossip with the remote peer by sending a gossip_timestamp_filter
* message with the specified first timestamp and range. By default, this
* starts gossip with the current timestamp and uint32_max as the range.
* @param start
* @param range
*/
activate(start = Math.trunc(Date.now() / 1000), range = 0xffffffff) {
this.logger.info("activating gossip for range %d to %d", start, range);
// set params
this._firstTimestamp = start;
this._timestampRange = range;
// send message
const msg = new GossipTimestampFilterMessage_1.GossipTimestampFilterMessage();
msg.chainHash = this.chainHash;
msg.firstTimestamp = start;
msg.timestampRange = range;
this.peer.sendMessage(msg);
// change state
this._state = GossipQueriesReceiverState.Receiving;
}
}
exports.GossipQueriesReceiver = GossipQueriesReceiver;
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