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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 | 1x 1x 1x 1x | import { BufferReader, BufferWriter } from "@node-lightning/bufio";
import { ShortChannelId } from "@node-lightning/core";
import { shortChannelIdFromBuffer } from "@node-lightning/core";
import { MessageType } from "../MessageType";
import { IWireMessage } from "./IWireMessage";
/**
* This is a direct messagee between two endpoints of a channel
* and serves as an opt-in mechanism to allow the
* announcement of the channel to the rest of the network. It
* contains the necessary signatuures, by the sender, to construct
* the channel_announcement message.
*
* The message constructed by constructing a channel_announcement
* message, corresponding to the newly created channel, and signing
* it with the secrets matching an endpoint's node_id and
* bitcoin_key.
*/
export class AnnouncementSignaturesMessage implements IWireMessage {
/**
* Deserializes a Buffer into an AnnouncementSignaturesMessage.
*/
public static deserialize(payload: Buffer): AnnouncementSignaturesMessage {
const reader = new BufferReader(payload);
reader.readUInt16BE(); // read off type
const instance = new AnnouncementSignaturesMessage();
instance.channelId = reader.readBytes(32);
instance.shortChannelId = shortChannelIdFromBuffer(reader.readBytes(8));
instance.nodeSignature = reader.readBytes(64);
instance.bitcoinSignature = reader.readBytes(64);
return instance;
}
/**
* Message type - 259
*/
public type: MessageType = MessageType.AnnouncementSignatures;
/**
* Buffer of the channel_id for the message.
*/
public channelId: Buffer = Buffer.alloc(0);
/**
* ShortChannelId is a unique reference to the funding output of
* the channel.
*/
public shortChannelId: ShortChannelId;
/**
* Buffer containing the signature of the channel_announcement message
* signed by the endpoint's node_id.
*/
public nodeSignature: Buffer = Buffer.alloc(0);
/**
* Buffer containing the signaturee of the channel_announcment message
* signed by the endpoint's bitcoin_key.
*/
public bitcoinSignature: Buffer = Buffer.alloc(0);
/**
* Serializes the instance into a Buffer suitable for
* transmission on the wire.
*/
public serialize(): Buffer {
const len =
2 + // type
32 + // channel_id
8 + // short_channel_id
64 + // node_signature
64; // bitcoin_signaturee
const writer = new BufferWriter(Buffer.alloc(len));
writer.writeUInt16BE(this.type);
writer.writeBytes(this.channelId);
writer.writeBytes(this.shortChannelId.toBuffer());
writer.writeBytes(this.nodeSignature);
writer.writeBytes(this.bitcoinSignature);
return writer.toBuffer();
}
}
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