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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | 1x 1x 1x 1x 1x 18x 18x 18x 18x 18x 18x 3x 3x 3x 4x 4x 4x 4x 4x 4x 4x 4x 4x 6x 6x 6x 6x 6x 6x 6x 6x 6x | import { ILogger } from "@node-lightning/logger";
import { GossipTimestampFilterMessage } from "../messages/GossipTimestampFilterMessage";
import { IMessageSender } from "../Peer";
export enum GossipQueriesReceiverState {
Idle,
Receiving,
}
/**
* This class is used to activate / deactivate receiving of gossip messages
* when the gossip_queries or gossip_queries_ex gossip sync strategies are used.
*/
export class GossipQueriesReceiver {
private _state: GossipQueriesReceiverState;
private _firstTimestamp: number;
private _timestampRange: number;
constructor(
readonly chainHash: Buffer,
readonly peer: IMessageSender,
readonly logger: ILogger,
) {
this._state = GossipQueriesReceiverState.Idle;
this._firstTimestamp = 0xffffffff;
this._timestampRange = 0;
}
public get state(): GossipQueriesReceiverState {
return this._state;
}
public get firstTimestamp(): number {
return this._firstTimestamp;
}
public get timestampRange(): number {
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.
*/
public deactivate() {
this.logger.info("deactivating gossip");
// reset params
this._firstTimestamp = 0xffffffff;
this._timestampRange = 0;
// send message
const msg = new 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
*/
public activate(start: number = 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();
msg.chainHash = this.chainHash;
msg.firstTimestamp = start;
msg.timestampRange = range;
this.peer.sendMessage(msg);
// change state
this._state = GossipQueriesReceiverState.Receiving;
}
}
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