@node-lightning/wire
Version:
Lightning Network Wire Protocol
53 lines • 1.86 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.PongMessage = void 0;
const bufio_1 = require("@node-lightning/bufio");
const MessageType_1 = require("../MessageType");
class PongMessage {
/**
* In order to allow for the existence of long-lived TCP
* connections, at times it may be required that both ends keep
* alive the TCP connection at the application level.
*
* The pong message is a reply to a ping message and must
* reply with the specify number of bytes when the num_pong_bytes
* value is less than 65532.
* for the number of pong bytes it expects to receive as
* a reply. The ignored bits should be set to 0.
*/
constructor(numPongBytes = 0) {
/**
* Message type = 19
*/
this.type = MessageType_1.MessageType.Pong;
this.ignored = Buffer.alloc(numPongBytes);
}
/**
* Deserializes a pong message from a Buffer into a PongMessage
* instance.
*/
static deserialize(payload) {
const instance = new PongMessage();
const reader = new bufio_1.BufferReader(payload);
reader.readUInt16BE(); // read off type
const byteslen = reader.readUInt16BE();
instance.ignored = reader.readBytes(byteslen);
return instance;
}
/**
* Serializes a PongMessage into a Buffer that can be
* streamed on the wire.
*/
serialize() {
const len = 2 + // type
2 + // byteslen
+this.ignored.length;
const writer = new bufio_1.BufferWriter(Buffer.alloc(len));
writer.writeUInt16BE(this.type);
writer.writeUInt16BE(this.ignored.length);
writer.writeBytes(this.ignored);
return writer.toBuffer();
}
}
exports.PongMessage = PongMessage;
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