@node-dlc/wire/lib/serialize/address/serializeTor3.ts

Lightning Network Wire Protocol

import { BufferWriter } from '@node-dlc/bufio';

import { AddressTor3 } from '../../domain/AddressTor3';
import { torStringToBuffer } from './torStringToBuffer';

/**
 * Serializes a Tor v3 address in a Buffer that can be sent
 * over the wire.
 */
export function serializeTor3(address: AddressTor3): Buffer {
  const writer = new BufferWriter(Buffer.alloc(38));

  const hostBytes = torStringToBuffer(address.host);

  writer.writeUInt8(address.type);
  writer.writeBytes(hostBytes);
  writer.writeUInt16BE(address.port);

  return writer.toBuffer();
}