@node-dlc/messaging

<!doctype html> <html lang="en"> <head> <title>Code coverage report for lib/messages/NodeAnnouncementMessage.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../../index.html">All files</a> / <a href="index.html">lib/messages</a> NodeAnnouncementMessage.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 90.57% Statements 48/53 </div> <div class='fl pad1y space-right2'> 50% Branches 1/2 </div> <div class='fl pad1y space-right2'> 71.43% Functions 5/7 </div> <div class='fl pad1y space-right2'> 92% Lines 46/50 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a href='#L13'>13</a> <a name='L14'></a><a href='#L14'>14</a> <a name='L15'></a><a href='#L15'>15</a> <a name='L16'></a><a href='#L16'>16</a> <a name='L17'></a><a href='#L17'>17</a> <a name='L18'></a><a href='#L18'>18</a> <a name='L19'></a><a href='#L19'>19</a> <a name='L20'></a><a href='#L20'>20</a> <a name='L21'></a><a href='#L21'>21</a> <a name='L22'></a><a href='#L22'>22</a> <a name='L23'></a><a href='#L23'>23</a> <a name='L24'></a><a href='#L24'>24</a> <a name='L25'></a><a href='#L25'>25</a> <a name='L26'></a><a href='#L26'>26</a> <a name='L27'></a><a href='#L27'>27</a> <a name='L28'></a><a href='#L28'>28</a> <a name='L29'></a><a href='#L29'>29</a> <a name='L30'></a><a href='#L30'>30</a> <a name='L31'></a><a href='#L31'>31</a> <a name='L32'></a><a href='#L32'>32</a> <a name='L33'></a><a href='#L33'>33</a> <a name='L34'></a><a href='#L34'>34</a> <a name='L35'></a><a href='#L35'>35</a> <a name='L36'></a><a href='#L36'>36</a> <a name='L37'></a><a href='#L37'>37</a> <a name='L38'></a><a href='#L38'>38</a> <a name='L39'></a><a href='#L39'>39</a> <a name='L40'></a><a href='#L40'>40</a> <a name='L41'></a><a href='#L41'>41</a> <a name='L42'></a><a href='#L42'>42</a> <a name='L43'></a><a href='#L43'>43</a> <a name='L44'></a><a href='#L44'>44</a> <a name='L45'></a><a href='#L45'>45</a> <a name='L46'></a><a href='#L46'>46</a> <a name='L47'></a><a href='#L47'>47</a> <a name='L48'></a><a href='#L48'>48</a> <a name='L49'></a><a href='#L49'>49</a> <a name='L50'></a><a href='#L50'>50</a> <a name='L51'></a><a href='#L51'>51</a> <a name='L52'></a><a href='#L52'>52</a> <a name='L53'></a><a href='#L53'>53</a> <a name='L54'></a><a href='#L54'>54</a> <a name='L55'></a><a href='#L55'>55</a> <a name='L56'></a><a href='#L56'>56</a> <a name='L57'></a><a href='#L57'>57</a> <a name='L58'></a><a href='#L58'>58</a> <a name='L59'></a><a href='#L59'>59</a> <a name='L60'></a><a href='#L60'>60</a> <a name='L61'></a><a href='#L61'>61</a> <a name='L62'></a><a href='#L62'>62</a> <a name='L63'></a><a href='#L63'>63</a> <a name='L64'></a><a href='#L64'>64</a> <a name='L65'></a><a href='#L65'>65</a> <a name='L66'></a><a href='#L66'>66</a> <a name='L67'></a><a href='#L67'>67</a> <a name='L68'></a><a href='#L68'>68</a> <a name='L69'></a><a href='#L69'>69</a> <a name='L70'></a><a href='#L70'>70</a> <a name='L71'></a><a href='#L71'>71</a> <a name='L72'></a><a href='#L72'>72</a> <a name='L73'></a><a href='#L73'>73</a> <a name='L74'></a><a href='#L74'>74</a> <a name='L75'></a><a href='#L75'>75</a> <a name='L76'></a><a href='#L76'>76</a> <a name='L77'></a><a href='#L77'>77</a> <a name='L78'></a><a href='#L78'>78</a> <a name='L79'></a><a href='#L79'>79</a> <a name='L80'></a><a href='#L80'>80</a> <a name='L81'></a><a href='#L81'>81</a> <a name='L82'></a><a href='#L82'>82</a> <a name='L83'></a><a href='#L83'>83</a> <a name='L84'></a><a href='#L84'>84</a> <a name='L85'></a><a href='#L85'>85</a> <a name='L86'></a><a href='#L86'>86</a> <a name='L87'></a><a href='#L87'>87</a> <a name='L88'></a><a href='#L88'>88</a> <a name='L89'></a><a href='#L89'>89</a> <a name='L90'></a><a href='#L90'>90</a> <a name='L91'></a><a href='#L91'>91</a> <a name='L92'></a><a href='#L92'>92</a> <a name='L93'></a><a href='#L93'>93</a> <a name='L94'></a><a href='#L94'>94</a> <a name='L95'></a><a href='#L95'>95</a> <a name='L96'></a><a href='#L96'>96</a> <a name='L97'></a><a href='#L97'>97</a> <a name='L98'></a><a href='#L98'>98</a> <a name='L99'></a><a href='#L99'>99</a> <a name='L100'></a><a href='#L100'>100</a> <a name='L101'></a><a href='#L101'>101</a> <a name='L102'></a><a href='#L102'>102</a> <a name='L103'></a><a href='#L103'>103</a> <a name='L104'></a><a href='#L104'>104</a> <a name='L105'></a><a href='#L105'>105</a> <a name='L106'></a><a href='#L106'>106</a> <a name='L107'></a><a href='#L107'>107</a> <a name='L108'></a><a href='#L108'>108</a> <a name='L109'></a><a href='#L109'>109</a> <a name='L110'></a><a href='#L110'>110</a> <a name='L111'></a><a href='#L111'>111</a> <a name='L112'></a><a href='#L112'>112</a> <a name='L113'></a><a href='#L113'>113</a> <a name='L114'></a><a href='#L114'>114</a> <a name='L115'></a><a href='#L115'>115</a> <a name='L116'></a><a href='#L116'>116</a> <a name='L117'></a><a href='#L117'>117</a> <a name='L118'></a><a href='#L118'>118</a> <a name='L119'></a><a href='#L119'>119</a> <a name='L120'></a><a href='#L120'>120</a> <a name='L121'></a><a href='#L121'>121</a> <a name='L122'></a><a href='#L122'>122</a> <a name='L123'></a><a href='#L123'>123</a> <a name='L124'></a><a href='#L124'>124</a> <a name='L125'></a><a href='#L125'>125</a> <a name='L126'></a><a href='#L126'>126</a> <a name='L127'></a><a href='#L127'>127</a> <a name='L128'></a><a href='#L128'>128</a> <a name='L129'></a><a href='#L129'>129</a> <a name='L130'></a><a href='#L130'>130</a> <a name='L131'></a><a href='#L131'>131</a> <a name='L132'></a><a href='#L132'>132</a> <a name='L133'></a><a href='#L133'>133</a> <a name='L134'></a><a href='#L134'>134</a> <a name='L135'></a><a href='#L135'>135</a> <a name='L136'></a><a href='#L136'>136</a> <a name='L137'></a><a href='#L137'>137</a> <a name='L138'></a><a href='#L138'>138</a> <a name='L139'></a><a href='#L139'>139</a> <a name='L140'></a><a href='#L140'>140</a> <a name='L141'></a><a href='#L141'>141</a> <a name='L142'></a><a href='#L142'>142</a> <a name='L143'></a><a href='#L143'>143</a> <a name='L144'></a><a href='#L144'>144</a> <a name='L145'></a><a href='#L145'>145</a> <a name='L146'></a><a href='#L146'>146</a></td><td class="line-coverage quiet">1x 1x 1x     1x 1x 1x               1x 1x     1x 1x 1x   1x   1x 1x   1x 1x 1x 1x 1x   1x   1x 1x   1x     1x                                               2x                                                                   2x     1x 1x     1x 1x 1x         1x     1x                   1x   1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x     1x      </td><td class="text"><pre class="prettyprint lang-js">import { BufferReader, BufferWriter } from '@node-dlc/bufio'; import { BitField } from '@node-dlc/common'; import * as crypto from '@node-dlc/crypto'; import { NodeFeatureFlags } from '@node-dlc/wire';   import { Address } from '../domain/Address'; import { MessageType } from '../MessageType'; import { getTlv } from '../serialize/getTlv'; import { IWireMessage } from './IWireMessage';   /** * This gossip message allows a node to indicate extra data associated with it, * in addition to its public key. To avoid trivial denial of service attacks, * nodes not associated with an already known channel are ignored. */ export class NodeAnnouncementMessage implements IWireMessage { public static type = MessageType.NodeAnnouncement;   public static deserialize(payload: Buffer): NodeAnnouncementMessage { const instance = new NodeAnnouncementMessage(); const reader = new BufferReader(payload); reader.readUInt16BE(); // read off type   instance.signature = reader.readBytes(64);   const flen = reader.readUInt16BE(); instance.features = BitField.fromBuffer(reader.readBytes(flen));   instance.timestamp = reader.readUInt32BE(); instance.nodeId = reader.readBytes(33); instance.rgbColor = reader.readBytes(3); instance.alias = reader.readBytes(32); instance.addresses = [];   reader.readUInt16BE(); // addr_len   while (!reader.eof) { const address = Address.deserialize(getTlv(reader));   instance.addresses.push(address); }   return instance; }   /** * Message hashing is after the first 66 bytes of the message * and excludes the type and signature. It performs a double * sha-256 hash of the remaining bytes. */ public static hash(msg: NodeAnnouncementMessage): Buffer { const bytes = msg.serialize().slice(66); // type + signature return crypto.hash256(bytes); }   /** * Verifies the message signature */ public static verifySignatures(msg: NodeAnnouncementMessage): boolean { const hash = NodeAnnouncementMessage.hash(msg); return crypto.verifySig(hash, msg.signature, msg.nodeId); }   /** * Type 257 */ public type: MessageType = MessageType.NodeAnnouncement;   /** * Signature of the announcement message by the node's public key * returned as a 64-byte Buffer. */ public signature: Buffer;   public features: BitField<NodeFeatureFlags>;   public timestamp: number;   /** * Compressed public key of the node that is a 33-byte * buffer. */ public nodeId: Buffer;   /** * Color of the node returned as a 3-byte Buffer. */ public rgbColor: Buffer;   /** * Alias of the node returned as a 32-byte Buffer. */ public alias: Buffer;   /** * Addresses that the node allow public network connections * on. The type indicates how the address is encoded. Addresses * are in order of connectivity preference. Currently * supported addresses formats are IPv4, IPv6, Tor2 and Tor3 */ public addresses: Address[] = [];   public serialize(): Buffer { const featuresBuffer = this.features.toBuffer(); const featuresLen = featuresBuffer.length;   // serialize addresses into buffers so we can obtain the length const addressBuffers = []; for (const address of this.addresses) { addressBuffers.push(address.serialize()); }   // obtain total address length // eslint-disable-next-line const addressBytes: number = addressBuffers.map(b => b.length).reduce((sum, val) => sum + val, 0); // prettier-ignore   const len = 2 + // type 64 + // signature 2 + // flen featuresLen + // features length 4 + // timestamp 33 + // node_id 3 + // rgb_color 32 + // alias 2 + // addresses addressBytes; // cumulative addr bytes const writer = new BufferWriter(Buffer.alloc(len));   writer.writeUInt16BE(this.type); writer.writeBytes(this.signature); writer.writeUInt16BE(featuresLen); Iif (featuresLen > 0) writer.writeBytes(featuresBuffer); writer.writeUInt32BE(this.timestamp); writer.writeBytes(this.nodeId); writer.writeBytes(this.rgbColor); writer.writeBytes(this.alias); writer.writeUInt16BE(addressBytes); for (const addressBuffer of addressBuffers) { writer.writeBytes(addressBuffer); }   return writer.toBuffer(); } }  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Tue Jul 22 2025 00:10:03 GMT-0700 (Pacific Daylight Saving Time) </div> </div> <script src="../../prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="../../sorter.js"></script> <script src="../../block-navigation.js"></script> </body> </html>