2023-09-07 14:09:36 +00:00
<!doctype html>
< html lang = "en" class = "no-js" >
< head >
< meta charset = "utf-8" >
< meta name = "viewport" content = "width=device-width,initial-scale=1" >
< link rel = "canonical" href = "https://status-im.github.io/nim-libp2p/docs/tutorial_5_discovery/" >
< link rel = "prev" href = "../tutorial_4_gossipsub/" >
< link rel = "next" href = "../tutorial_6_game/" >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< link rel = "icon" href = "https://libp2p.io/img/logo_small.png" >
2024-12-17 18:38:51 +00:00
< meta name = "generator" content = "mkdocs-1.6.1, mkdocs-material-9.5.49" >
2023-09-07 14:09:36 +00:00
< title > Discovery Manager - nim-libp2p< / title >
2024-11-27 12:51:11 +00:00
< link rel = "stylesheet" href = "../assets/stylesheets/main.6f8fc17f.min.css" >
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
< link rel = "stylesheet" href = "../assets/stylesheets/palette.06af60db.min.css" >
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< link rel = "preconnect" href = "https://fonts.gstatic.com" crossorigin >
< link rel = "stylesheet" href = "https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback" >
< style > : root { --md-text-font : "Roboto" ; --md-code-font : "Roboto Mono" } < / style >
2024-09-01 21:50:52 +00:00
< script > _ _md _scope = new URL ( ".." , location ) , _ _md _hash = e => [ ... e ] . reduce ( ( ( e , _ ) => ( e << 5 ) - e + _ . charCodeAt ( 0 ) ) , 0 ) , _ _md _get = ( e , _ = localStorage , t = _ _md _scope ) => JSON . parse ( _ . getItem ( t . pathname + "." + e ) ) , _ _md _set = ( e , _ , t = localStorage , a = _ _md _scope ) => { try { t . setItem ( a . pathname + "." + e , JSON . stringify ( _ ) ) } catch ( e ) { } } < / script >
2023-09-07 14:09:36 +00:00
< / head >
< body dir = "ltr" data-md-color-scheme = "default" data-md-color-primary = "blue-grey" data-md-color-accent = "indigo" >
< input class = "md-toggle" data-md-toggle = "drawer" type = "checkbox" id = "__drawer" autocomplete = "off" >
< input class = "md-toggle" data-md-toggle = "search" type = "checkbox" id = "__search" autocomplete = "off" >
< label class = "md-overlay" for = "__drawer" > < / label >
< div data-md-component = "skip" >
< a href = "#discovery-manager" class = "md-skip" >
Skip to content
< / a >
< / div >
< div data-md-component = "announce" >
< / div >
< header class = "md-header md-header--shadow" data-md-component = "header" >
< nav class = "md-header__inner md-grid" aria-label = "Header" >
< a href = ".." title = "nim-libp2p" class = "md-header__button md-logo" aria-label = "nim-libp2p" data-md-component = "logo" >
< img src = "https://libp2p.io/img/logo_small.png" alt = "logo" >
< / a >
< label class = "md-header__button md-icon" for = "__drawer" >
2024-06-13 10:30:22 +00:00
2024-09-01 21:50:52 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M3 6h18v2H3zm0 5h18v2H3zm0 5h18v2H3z" / > < / svg >
2023-09-07 14:09:36 +00:00
< / label >
< div class = "md-header__title" data-md-component = "header-title" >
< div class = "md-header__ellipsis" >
< div class = "md-header__topic" >
< span class = "md-ellipsis" >
nim-libp2p
< / span >
< / div >
< div class = "md-header__topic" data-md-component = "header-topic" >
< span class = "md-ellipsis" >
Discovery Manager
< / span >
< / div >
< / div >
< / div >
< form class = "md-header__option" data-md-component = "palette" >
2024-06-13 10:30:22 +00:00
< input class = "md-option" data-md-color-media = "" data-md-color-scheme = "default" data-md-color-primary = "blue-grey" data-md-color-accent = "indigo" aria-label = "Switch to dark mode" type = "radio" name = "__palette" id = "__palette_0" >
< label class = "md-header__button md-icon" title = "Switch to dark mode" for = "__palette_1" hidden >
2024-09-01 21:50:52 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M17 7H7a5 5 0 0 0-5 5 5 5 0 0 0 5 5h10a5 5 0 0 0 5-5 5 5 0 0 0-5-5m0 8a3 3 0 0 1-3-3 3 3 0 0 1 3-3 3 3 0 0 1 3 3 3 3 0 0 1-3 3" / > < / svg >
2024-06-13 10:30:22 +00:00
< / label >
< input class = "md-option" data-md-color-media = "" data-md-color-scheme = "slate" data-md-color-primary = "blue-grey" data-md-color-accent = "indigo" aria-label = "Switch to light mode" type = "radio" name = "__palette" id = "__palette_1" >
< label class = "md-header__button md-icon" title = "Switch to light mode" for = "__palette_0" hidden >
2024-09-01 21:50:52 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M17 6H7c-3.31 0-6 2.69-6 6s2.69 6 6 6h10c3.31 0 6-2.69 6-6s-2.69-6-6-6m0 10H7c-2.21 0-4-1.79-4-4s1.79-4 4-4h10c2.21 0 4 1.79 4 4s-1.79 4-4 4M7 9c-1.66 0-3 1.34-3 3s1.34 3 3 3 3-1.34 3-3-1.34-3-3-3" / > < / svg >
2024-06-13 10:30:22 +00:00
< / label >
< / form >
2023-09-07 14:09:36 +00:00
2024-09-01 21:50:52 +00:00
< script > var palette = _ _md _get ( "__palette" ) ; if ( palette && palette . color ) { if ( "(prefers-color-scheme)" === palette . color . media ) { var media = matchMedia ( "(prefers-color-scheme: light)" ) , input = document . querySelector ( media . matches ? "[data-md-color-media='(prefers-color-scheme: light)']" : "[data-md-color-media='(prefers-color-scheme: dark)']" ) ; palette . color . media = input . getAttribute ( "data-md-color-media" ) , palette . color . scheme = input . getAttribute ( "data-md-color-scheme" ) , palette . color . primary = input . getAttribute ( "data-md-color-primary" ) , palette . color . accent = input . getAttribute ( "data-md-color-accent" ) } for ( var [ key , value ] of Object . entries ( palette . color ) ) document . body . setAttribute ( "data-md-color-" + key , value ) } < / script >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< label class = "md-header__button md-icon" for = "__search" >
2024-06-13 10:30:22 +00:00
2024-09-01 21:50:52 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.52 6.52 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5" / > < / svg >
2023-09-07 14:09:36 +00:00
< / label >
< div class = "md-search" data-md-component = "search" role = "dialog" >
< label class = "md-search__overlay" for = "__search" > < / label >
< div class = "md-search__inner" role = "search" >
< form class = "md-search__form" name = "search" >
< input type = "text" class = "md-search__input" name = "query" aria-label = "Search" placeholder = "Search" autocapitalize = "off" autocorrect = "off" autocomplete = "off" spellcheck = "false" data-md-component = "search-query" required >
< label class = "md-search__icon md-icon" for = "__search" >
2024-06-13 10:30:22 +00:00
2024-09-01 21:50:52 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.52 6.52 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5" / > < / svg >
2024-06-13 10:30:22 +00:00
2024-09-01 21:50:52 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11z" / > < / svg >
2023-09-07 14:09:36 +00:00
< / label >
< nav class = "md-search__options" aria-label = "Search" >
< button type = "reset" class = "md-search__icon md-icon" title = "Clear" aria-label = "Clear" tabindex = "-1" >
2024-06-13 10:30:22 +00:00
2024-09-01 21:50:52 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z" / > < / svg >
2023-09-07 14:09:36 +00:00
< / button >
< / nav >
< / form >
< div class = "md-search__output" >
2024-06-13 10:30:22 +00:00
< div class = "md-search__scrollwrap" tabindex = "0" data-md-scrollfix >
2023-09-07 14:09:36 +00:00
< div class = "md-search-result" data-md-component = "search-result" >
< div class = "md-search-result__meta" >
Initializing search
< / div >
< ol class = "md-search-result__list" role = "presentation" > < / ol >
< / div >
< / div >
< / div >
< / div >
< / div >
< div class = "md-header__source" >
< a href = "https://github.com/status-im/nim-libp2p" title = "Go to repository" class = "md-source" data-md-component = "source" >
< div class = "md-source__icon md-icon" >
2024-11-27 12:51:11 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 448 512" > <!-- ! Font Awesome Free 6.7.1 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2024 Fonticons, Inc. --> < path d = "M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81" / > < / svg >
2023-09-07 14:09:36 +00:00
< / div >
< div class = "md-source__repository" >
status-im/nim-libp2p
< / div >
< / a >
< / div >
< / nav >
< / header >
< div class = "md-container" data-md-component = "container" >
< main class = "md-main" data-md-component = "main" >
< div class = "md-main__inner md-grid" >
< div class = "md-sidebar md-sidebar--primary" data-md-component = "sidebar" data-md-type = "navigation" >
< div class = "md-sidebar__scrollwrap" >
< div class = "md-sidebar__inner" >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< nav class = "md-nav md-nav--primary" aria-label = "Navigation" data-md-level = "0" >
< label class = "md-nav__title" for = "__drawer" >
< a href = ".." title = "nim-libp2p" class = "md-nav__button md-logo" aria-label = "nim-libp2p" data-md-component = "logo" >
< img src = "https://libp2p.io/img/logo_small.png" alt = "logo" >
< / a >
nim-libp2p
< / label >
< div class = "md-nav__source" >
< a href = "https://github.com/status-im/nim-libp2p" title = "Go to repository" class = "md-source" data-md-component = "source" >
< div class = "md-source__icon md-icon" >
2024-11-27 12:51:11 +00:00
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 448 512" > <!-- ! Font Awesome Free 6.7.1 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2024 Fonticons, Inc. --> < path d = "M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81" / > < / svg >
2023-09-07 14:09:36 +00:00
< / div >
< div class = "md-source__repository" >
status-im/nim-libp2p
< / div >
< / a >
< / div >
< ul class = "md-nav__list" data-md-scrollfix >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item md-nav__item--active md-nav__item--nested" >
2024-06-13 10:30:22 +00:00
< input class = "md-nav__toggle md-toggle " type = "checkbox" id = "__nav_1" checked >
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
< label class = "md-nav__link" for = "__nav_1" id = "__nav_1_label" tabindex = "0" >
< span class = "md-ellipsis" >
Tutorials
< / span >
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" data-md-level = "1" aria-labelledby = "__nav_1_label" aria-expanded = "true" >
< label class = "md-nav__title" for = "__nav_1" >
< span class = "md-nav__icon md-icon" > < / span >
Tutorials
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = ".." class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Introduction
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = "../tutorial_1_connect/" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Simple connection
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = "../tutorial_2_customproto/" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Create a custom protocol
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = "../tutorial_3_protobuf/" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Protobuf
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = "../tutorial_4_gossipsub/" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
GossipSub
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item md-nav__item--active" >
< input class = "md-nav__toggle md-toggle" type = "checkbox" id = "__toc" >
< label class = "md-nav__link md-nav__link--active" for = "__toc" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Discovery Manager
< / span >
2023-09-07 14:09:36 +00:00
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< a href = "./" class = "md-nav__link md-nav__link--active" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Discovery Manager
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" > < / span >
Table of contents
< / label >
< ul class = "md-nav__list" data-md-component = "toc" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "#bootnodes" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Bootnodes
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
< / ul >
< / nav >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = "../tutorial_6_game/" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Game
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = "../circuitrelay/" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Circuit Relay
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
2024-06-13 10:30:22 +00:00
< / ul >
< / nav >
2023-09-07 14:09:36 +00:00
< / li >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< li class = "md-nav__item" >
< a href = "/nim-libp2p/master/libp2p.html" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Reference
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
< / ul >
< / nav >
< / div >
< / div >
< / div >
< div class = "md-sidebar md-sidebar--secondary" data-md-component = "sidebar" data-md-type = "toc" >
< div class = "md-sidebar__scrollwrap" >
< div class = "md-sidebar__inner" >
< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" > < / span >
Table of contents
< / label >
< ul class = "md-nav__list" data-md-component = "toc" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "#bootnodes" class = "md-nav__link" >
2024-06-13 10:30:22 +00:00
< span class = "md-ellipsis" >
Bootnodes
< / span >
2023-09-07 14:09:36 +00:00
< / a >
< / li >
< / ul >
< / nav >
< / div >
< / div >
< / div >
< div class = "md-content" data-md-component = "content" >
< article class = "md-content__inner md-typeset" >
< h1 id = "discovery-manager" > Discovery Manager< / h1 >
< p > In the < a href = "../tutorial_4_gossipsub/" > previous tutorial< / a > , we built a custom protocol using < a href = "https://developers.google.com/protocol-buffers" > protobuf< / a > and
spread informations (some metrics) on the network using gossipsub.
2024-06-13 10:30:22 +00:00
For this tutorial, on the other hand, we'll go back to a simple example
2023-09-07 14:09:36 +00:00
we'll try to discover a specific peers to greet on the network.< / p >
< p > First, as usual, we import the dependencies:
< div class = "highlight" > < pre > < span > < / span > < code > < a id = "__codelineno-0-1" name = "__codelineno-0-1" href = "#__codelineno-0-1" > < / a > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "n" > sequtils< / span >
< a id = "__codelineno-0-2" name = "__codelineno-0-2" href = "#__codelineno-0-2" > < / a > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "n" > chronos< / span >
< a id = "__codelineno-0-3" name = "__codelineno-0-3" href = "#__codelineno-0-3" > < / a > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "n" > stew< / span > < span class = "o" > /< / span > < span class = "n" > byteutils< / span >
< a id = "__codelineno-0-4" name = "__codelineno-0-4" href = "#__codelineno-0-4" > < / a >
< a id = "__codelineno-0-5" name = "__codelineno-0-5" href = "#__codelineno-0-5" > < / a > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "n" > libp2p< / span >
< a id = "__codelineno-0-6" name = "__codelineno-0-6" href = "#__codelineno-0-6" > < / a > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "n" > libp2p< / span > < span class = "o" > /< / span > < span class = "n" > protocols< / span > < span class = "o" > /< / span > < span class = "n" > rendezvous< / span >
< a id = "__codelineno-0-7" name = "__codelineno-0-7" href = "#__codelineno-0-7" > < / a > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "n" > libp2p< / span > < span class = "o" > /< / span > < span class = "n" > discovery< / span > < span class = "o" > /< / span > < span class = "n" > rendezvousinterface< / span >
< a id = "__codelineno-0-8" name = "__codelineno-0-8" href = "#__codelineno-0-8" > < / a > < span class = "kn" > import< / span > < span class = "w" > < / span > < span class = "n" > libp2p< / span > < span class = "o" > /< / span > < span class = "n" > discovery< / span > < span class = "o" > /< / span > < span class = "n" > discoverymngr< / span >
< / code > < / pre > < / div >
We'll not use newStandardSwitch this time as we need the discovery protocol
< a href = "https://github.com/libp2p/specs/blob/master/rendezvous/README.md" > RendezVous< / a > to be mounted on the switch using withRendezVous.< / p >
< p > Note that other discovery methods such as < a href = "https://github.com/libp2p/specs/blob/master/kad-dht/README.md" > Kademlia< / a > or < a href = "https://github.com/ethereum/devp2p/blob/master/discv5/discv5.md" > discv5< / a > exist.
< div class = "highlight" > < pre > < span > < / span > < code > < a id = "__codelineno-1-1" name = "__codelineno-1-1" href = "#__codelineno-1-1" > < / a > < span class = "k" > proc< / span > < span class = "w" > < / span > < span class = "nf" > createSwitch< / span > < span class = "p" > (< / span > < span class = "n" > rdv< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > RendezVous< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > RendezVous< / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > ()):< / span > < span class = "w" > < / span > < span class = "n" > Switch< / span > < span class = "w" > < / span > < span class = "o" > =< / span >
2024-06-13 10:30:22 +00:00
< a id = "__codelineno-1-2" name = "__codelineno-1-2" href = "#__codelineno-1-2" > < / a > < span class = "w" > < / span > < span class = "n" > SwitchBuilder< / span >
< a id = "__codelineno-1-3" name = "__codelineno-1-3" href = "#__codelineno-1-3" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-1-4" name = "__codelineno-1-4" href = "#__codelineno-1-4" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > withRng< / span > < span class = "p" > (< / span > < span class = "n" > newRng< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-1-5" name = "__codelineno-1-5" href = "#__codelineno-1-5" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > withAddresses< / span > < span class = "p" > (< / span > < span class = "o" > @[< / span > < span class = "n" > MultiAddress< / span > < span class = "p" > .< / span > < span class = "n" > init< / span > < span class = "p" > (< / span > < span class = "s" > " /ip4/0.0.0.0/tcp/0" < / span > < span class = "p" > ).< / span > < span class = "n" > tryGet< / span > < span class = "p" > ()< / span > < span class = "o" > ]< / span > < span class = "p" > )< / span >
< a id = "__codelineno-1-6" name = "__codelineno-1-6" href = "#__codelineno-1-6" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > withTcpTransport< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-1-7" name = "__codelineno-1-7" href = "#__codelineno-1-7" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > withYamux< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-1-8" name = "__codelineno-1-8" href = "#__codelineno-1-8" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > withNoise< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-1-9" name = "__codelineno-1-9" href = "#__codelineno-1-9" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > withRendezVous< / span > < span class = "p" > (< / span > < span class = "n" > rdv< / span > < span class = "p" > )< / span >
< a id = "__codelineno-1-10" name = "__codelineno-1-10" href = "#__codelineno-1-10" > < / a > < span class = "w" > < / span > < span class = "p" > .< / span > < span class = "n" > build< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-1-11" name = "__codelineno-1-11" href = "#__codelineno-1-11" > < / a >
< a id = "__codelineno-1-12" name = "__codelineno-1-12" href = "#__codelineno-1-12" > < / a > < span class = "c" > # Create a really simple protocol to log one message received then close the stream< / span >
< a id = "__codelineno-1-13" name = "__codelineno-1-13" href = "#__codelineno-1-13" > < / a > < span class = "k" > const< / span > < span class = "w" > < / span > < span class = "n" > DumbCodec< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "s" > " /dumb/proto/1.0.0" < / span >
< a id = "__codelineno-1-14" name = "__codelineno-1-14" href = "#__codelineno-1-14" > < / a > < span class = "k" > type< / span > < span class = "w" > < / span > < span class = "n" > DumbProto< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "k" > ref< / span > < span class = "w" > < / span > < span class = "k" > object< / span > < span class = "w" > < / span > < span class = "k" > of< / span > < span class = "w" > < / span > < span class = "n" > LPProtocol< / span >
< a id = "__codelineno-1-15" name = "__codelineno-1-15" href = "#__codelineno-1-15" > < / a > < span class = "k" > proc< / span > < span class = "w" > < / span > < span class = "nf" > new< / span > < span class = "p" > (< / span > < span class = "n" > T< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > typedesc< / span > < span class = "o" > [< / span > < span class = "n" > DumbProto< / span > < span class = "o" > ]< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > nodeNumber< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nb" > int< / span > < span class = "p" > ):< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "w" > < / span > < span class = "o" > =< / span >
< a id = "__codelineno-1-16" name = "__codelineno-1-16" href = "#__codelineno-1-16" > < / a > < span class = "w" > < / span > < span class = "k" > proc< / span > < span class = "w" > < / span > < span class = "nf" > handle< / span > < span class = "p" > (< / span > < span class = "n" > conn< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "n" > Connection< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > proto< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nb" > string< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "sx" > {.async.}< / span > < span class = "w" > < / span > < span class = "o" > =< / span >
< a id = "__codelineno-1-17" name = "__codelineno-1-17" href = "#__codelineno-1-17" > < / a > < span class = "w" > < / span > < span class = "n" > echo< / span > < span class = "w" > < / span > < span class = "s" > " Node" < / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > nodeNumber< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "s" > " received: " < / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "nb" > string< / span > < span class = "p" > .< / span > < span class = "n" > fromBytes< / span > < span class = "p" > (< / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > readLp< / span > < span class = "p" > (< / span > < span class = "mi" > 1024< / span > < span class = "p" > ))< / span >
< a id = "__codelineno-1-18" name = "__codelineno-1-18" href = "#__codelineno-1-18" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > close< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-1-19" name = "__codelineno-1-19" href = "#__codelineno-1-19" > < / a >
< a id = "__codelineno-1-20" name = "__codelineno-1-20" href = "#__codelineno-1-20" > < / a > < span class = "w" > < / span > < span class = "k" > return< / span > < span class = "w" > < / span > < span class = "n" > T< / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > (< / span > < span class = "n" > codecs< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "o" > @[< / span > < span class = "n" > DumbCodec< / span > < span class = "o" > ]< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > handler< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > handle< / span > < span class = "p" > )< / span >
2023-09-07 14:09:36 +00:00
< / code > < / pre > < / div > < / p >
< h2 id = "bootnodes" > Bootnodes< / h2 >
< p > The first time a p2p program is ran, he needs to know how to join
its network. This is generally done by hard-coding a list of stable
nodes in the binary, called "bootnodes". These bootnodes are a
critical part of a p2p network, since they are used by every new
user to onboard the network.< / p >
< p > By using libp2p, we can use any node supporting our discovery protocol
(rendezvous in this case) as a bootnode. For this example, we'll
create a bootnode, and then every peer will advertise itself on the
bootnode, and use it to find other peers
2024-06-13 10:30:22 +00:00
< div class = "highlight" > < pre > < span > < / span > < code > < a id = "__codelineno-2-1" name = "__codelineno-2-1" href = "#__codelineno-2-1" > < / a > < span class = "k" > proc< / span > < span class = "w" > < / span > < span class = "nf" > main< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "sx" > {.async.}< / span > < span class = "w" > < / span > < span class = "o" > =< / span >
2023-09-07 14:09:36 +00:00
< a id = "__codelineno-2-2" name = "__codelineno-2-2" href = "#__codelineno-2-2" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span > < span class = "w" > < / span > < span class = "n" > bootNode< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > createSwitch< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-2-3" name = "__codelineno-2-3" href = "#__codelineno-2-3" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > bootNode< / span > < span class = "p" > .< / span > < span class = "n" > start< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-2-4" name = "__codelineno-2-4" href = "#__codelineno-2-4" > < / a >
< a id = "__codelineno-2-5" name = "__codelineno-2-5" href = "#__codelineno-2-5" > < / a > < span class = "w" > < / span > < span class = "c" > # Create 5 nodes in the network< / span >
< a id = "__codelineno-2-6" name = "__codelineno-2-6" href = "#__codelineno-2-6" > < / a > < span class = "w" > < / span > < span class = "kd" > var< / span >
< a id = "__codelineno-2-7" name = "__codelineno-2-7" href = "#__codelineno-2-7" > < / a > < span class = "w" > < / span > < span class = "n" > switches< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nb" > seq< / span > < span class = "o" > [< / span > < span class = "n" > Switch< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "o" > @[]< / span >
< a id = "__codelineno-2-8" name = "__codelineno-2-8" href = "#__codelineno-2-8" > < / a > < span class = "w" > < / span > < span class = "n" > discManagers< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "nb" > seq< / span > < span class = "o" > [< / span > < span class = "n" > DiscoveryManager< / span > < span class = "o" > ]< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "o" > @[]< / span >
< a id = "__codelineno-2-9" name = "__codelineno-2-9" href = "#__codelineno-2-9" > < / a >
2024-06-13 10:30:22 +00:00
< a id = "__codelineno-2-10" name = "__codelineno-2-10" href = "#__codelineno-2-10" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "ow" > in< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "w" > < / span > < span class = "p" > ..< / span > < span class = "w" > < / span > < span class = "mi" > 5< / span > < span class = "p" > :< / span >
2023-09-07 14:09:36 +00:00
< a id = "__codelineno-2-11" name = "__codelineno-2-11" href = "#__codelineno-2-11" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span > < span class = "w" > < / span > < span class = "n" > rdv< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > RendezVous< / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-2-12" name = "__codelineno-2-12" href = "#__codelineno-2-12" > < / a > < span class = "w" > < / span > < span class = "c" > # Create a remote future to await at the end of the program< / span >
< a id = "__codelineno-2-13" name = "__codelineno-2-13" href = "#__codelineno-2-13" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span > < span class = "w" > < / span > < span class = "n" > switch< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > createSwitch< / span > < span class = "p" > (< / span > < span class = "n" > rdv< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-14" name = "__codelineno-2-14" href = "#__codelineno-2-14" > < / a > < span class = "w" > < / span > < span class = "n" > switch< / span > < span class = "p" > .< / span > < span class = "n" > mount< / span > < span class = "p" > (< / span > < span class = "n" > DumbProto< / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > (< / span > < span class = "n" > i< / span > < span class = "p" > ))< / span >
< a id = "__codelineno-2-15" name = "__codelineno-2-15" href = "#__codelineno-2-15" > < / a > < span class = "w" > < / span > < span class = "n" > switches< / span > < span class = "p" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > switch< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-16" name = "__codelineno-2-16" href = "#__codelineno-2-16" > < / a >
< a id = "__codelineno-2-17" name = "__codelineno-2-17" href = "#__codelineno-2-17" > < / a > < span class = "w" > < / span > < span class = "c" > # A discovery manager is a simple tool, you can set it up by adding discovery< / span >
< a id = "__codelineno-2-18" name = "__codelineno-2-18" href = "#__codelineno-2-18" > < / a > < span class = "w" > < / span > < span class = "c" > # interfaces (such as RendezVousInterface) then you can use it to advertise< / span >
< a id = "__codelineno-2-19" name = "__codelineno-2-19" href = "#__codelineno-2-19" > < / a > < span class = "w" > < / span > < span class = "c" > # something on the network or to request something from it.< / span >
< a id = "__codelineno-2-20" name = "__codelineno-2-20" href = "#__codelineno-2-20" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > DiscoveryManager< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-2-21" name = "__codelineno-2-21" href = "#__codelineno-2-21" > < / a > < span class = "w" > < / span > < span class = "c" > # A RendezVousInterface is a RendezVous protocol wrapped to be usable by the< / span >
< a id = "__codelineno-2-22" name = "__codelineno-2-22" href = "#__codelineno-2-22" > < / a > < span class = "w" > < / span > < span class = "c" > # DiscoveryManager.< / span >
< a id = "__codelineno-2-23" name = "__codelineno-2-23" href = "#__codelineno-2-23" > < / a > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "p" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > RendezVousInterface< / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > (< / span > < span class = "n" > rdv< / span > < span class = "p" > ))< / span >
< a id = "__codelineno-2-24" name = "__codelineno-2-24" href = "#__codelineno-2-24" > < / a > < span class = "w" > < / span > < span class = "n" > discManagers< / span > < span class = "p" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > dm< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-25" name = "__codelineno-2-25" href = "#__codelineno-2-25" > < / a >
< a id = "__codelineno-2-26" name = "__codelineno-2-26" href = "#__codelineno-2-26" > < / a > < span class = "w" > < / span > < span class = "c" > # We can now start the switch and connect to the bootnode< / span >
< a id = "__codelineno-2-27" name = "__codelineno-2-27" href = "#__codelineno-2-27" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > switch< / span > < span class = "p" > .< / span > < span class = "n" > start< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-2-28" name = "__codelineno-2-28" href = "#__codelineno-2-28" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > switch< / span > < span class = "p" > .< / span > < span class = "n" > connect< / span > < span class = "p" > (< / span > < span class = "n" > bootNode< / span > < span class = "p" > .< / span > < span class = "n" > peerInfo< / span > < span class = "p" > .< / span > < span class = "n" > peerId< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > bootNode< / span > < span class = "p" > .< / span > < span class = "n" > peerInfo< / span > < span class = "p" > .< / span > < span class = "n" > addrs< / span > < span class = "p" > )< / span >
< a id = "__codelineno-2-29" name = "__codelineno-2-29" href = "#__codelineno-2-29" > < / a >
< a id = "__codelineno-2-30" name = "__codelineno-2-30" href = "#__codelineno-2-30" > < / a > < span class = "w" > < / span > < span class = "c" > # Each nodes of the network will advertise on some topics (EvenGang or OddClub)< / span >
< a id = "__codelineno-2-31" name = "__codelineno-2-31" href = "#__codelineno-2-31" > < / a > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "p" > .< / span > < span class = "n" > advertise< / span > < span class = "p" > (< / span > < span class = "n" > RdvNamespace< / span > < span class = "p" > (< / span > < span class = "k" > if< / span > < span class = "w" > < / span > < span class = "n" > i< / span > < span class = "w" > < / span > < span class = "ow" > mod< / span > < span class = "w" > < / span > < span class = "mi" > 2< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "mi" > 0< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "s" > " EvenGang" < / span > < span class = "w" > < / span > < span class = "k" > else< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "s" > " OddClub" < / span > < span class = "p" > ))< / span >
< / code > < / pre > < / div >
We can now create the newcomer. This peer will connect to the boot node, and use
it to discover peers & greet them.< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < a id = "__codelineno-3-1" name = "__codelineno-3-1" href = "#__codelineno-3-1" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span >
< a id = "__codelineno-3-2" name = "__codelineno-3-2" href = "#__codelineno-3-2" > < / a > < span class = "w" > < / span > < span class = "n" > rdv< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > RendezVous< / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-3" name = "__codelineno-3-3" href = "#__codelineno-3-3" > < / a > < span class = "w" > < / span > < span class = "n" > newcomer< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > createSwitch< / span > < span class = "p" > (< / span > < span class = "n" > rdv< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-4" name = "__codelineno-3-4" href = "#__codelineno-3-4" > < / a > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > DiscoveryManager< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-5" name = "__codelineno-3-5" href = "#__codelineno-3-5" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > newcomer< / span > < span class = "p" > .< / span > < span class = "n" > start< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-6" name = "__codelineno-3-6" href = "#__codelineno-3-6" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > newcomer< / span > < span class = "p" > .< / span > < span class = "n" > connect< / span > < span class = "p" > (< / span > < span class = "n" > bootNode< / span > < span class = "p" > .< / span > < span class = "n" > peerInfo< / span > < span class = "p" > .< / span > < span class = "n" > peerId< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > bootNode< / span > < span class = "p" > .< / span > < span class = "n" > peerInfo< / span > < span class = "p" > .< / span > < span class = "n" > addrs< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-7" name = "__codelineno-3-7" href = "#__codelineno-3-7" > < / a > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "p" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > RendezVousInterface< / span > < span class = "p" > .< / span > < span class = "n" > new< / span > < span class = "p" > (< / span > < span class = "n" > rdv< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > ttr< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "mf" > 250.< / span > < span class = "n" > milliseconds< / span > < span class = "p" > ))< / span >
< a id = "__codelineno-3-8" name = "__codelineno-3-8" href = "#__codelineno-3-8" > < / a >
< a id = "__codelineno-3-9" name = "__codelineno-3-9" href = "#__codelineno-3-9" > < / a > < span class = "w" > < / span > < span class = "c" > # Use the discovery manager to find peers on the OddClub topic to greet them< / span >
< a id = "__codelineno-3-10" name = "__codelineno-3-10" href = "#__codelineno-3-10" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span > < span class = "w" > < / span > < span class = "n" > queryOddClub< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "p" > .< / span > < span class = "n" > request< / span > < span class = "p" > (< / span > < span class = "n" > RdvNamespace< / span > < span class = "p" > (< / span > < span class = "s" > " OddClub" < / span > < span class = "p" > ))< / span >
2024-06-13 10:30:22 +00:00
< a id = "__codelineno-3-11" name = "__codelineno-3-11" href = "#__codelineno-3-11" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "err" > _ in 0 .. 2:< / span >
2023-09-07 14:09:36 +00:00
< a id = "__codelineno-3-12" name = "__codelineno-3-12" href = "#__codelineno-3-12" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span >
< a id = "__codelineno-3-13" name = "__codelineno-3-13" href = "#__codelineno-3-13" > < / a > < span class = "w" > < / span > < span class = "c" > # getPeer give you a PeerAttribute containing informations about the peer.< / span >
< a id = "__codelineno-3-14" name = "__codelineno-3-14" href = "#__codelineno-3-14" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > queryOddClub< / span > < span class = "p" > .< / span > < span class = "n" > getPeer< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-15" name = "__codelineno-3-15" href = "#__codelineno-3-15" > < / a > < span class = "w" > < / span > < span class = "c" > # Here we will use the PeerId and the MultiAddress to greet him< / span >
< a id = "__codelineno-3-16" name = "__codelineno-3-16" href = "#__codelineno-3-16" > < / a > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > newcomer< / span > < span class = "p" > .< / span > < span class = "n" > dial< / span > < span class = "p" > (< / span > < span class = "n" > res< / span > < span class = "o" > [< / span > < span class = "n" > PeerId< / span > < span class = "o" > ]< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > getAll< / span > < span class = "p" > (< / span > < span class = "n" > MultiAddress< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > DumbCodec< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-17" name = "__codelineno-3-17" href = "#__codelineno-3-17" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > writeLp< / span > < span class = "p" > (< / span > < span class = "s" > " Odd Club suuuucks! Even Gang is better!" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-18" name = "__codelineno-3-18" href = "#__codelineno-3-18" > < / a > < span class = "w" > < / span > < span class = "c" > # Uh-oh!< / span >
< a id = "__codelineno-3-19" name = "__codelineno-3-19" href = "#__codelineno-3-19" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > close< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-20" name = "__codelineno-3-20" href = "#__codelineno-3-20" > < / a > < span class = "w" > < / span > < span class = "c" > # Wait for the peer to close the stream< / span >
< a id = "__codelineno-3-21" name = "__codelineno-3-21" href = "#__codelineno-3-21" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > join< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-22" name = "__codelineno-3-22" href = "#__codelineno-3-22" > < / a > < span class = "w" > < / span > < span class = "c" > # Queries will run in a loop, so we must stop them when we are done< / span >
< a id = "__codelineno-3-23" name = "__codelineno-3-23" href = "#__codelineno-3-23" > < / a > < span class = "w" > < / span > < span class = "n" > queryOddClub< / span > < span class = "p" > .< / span > < span class = "n" > stop< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-24" name = "__codelineno-3-24" href = "#__codelineno-3-24" > < / a >
< a id = "__codelineno-3-25" name = "__codelineno-3-25" href = "#__codelineno-3-25" > < / a > < span class = "w" > < / span > < span class = "c" > # Maybe it was because he wanted to join the EvenGang< / span >
< a id = "__codelineno-3-26" name = "__codelineno-3-26" href = "#__codelineno-3-26" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span > < span class = "w" > < / span > < span class = "n" > queryEvenGang< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "p" > .< / span > < span class = "n" > request< / span > < span class = "p" > (< / span > < span class = "n" > RdvNamespace< / span > < span class = "p" > (< / span > < span class = "s" > " EvenGang" < / span > < span class = "p" > ))< / span >
2024-06-13 10:30:22 +00:00
< a id = "__codelineno-3-27" name = "__codelineno-3-27" href = "#__codelineno-3-27" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "err" > _ in 0 .. 2:< / span >
2023-09-07 14:09:36 +00:00
< a id = "__codelineno-3-28" name = "__codelineno-3-28" href = "#__codelineno-3-28" > < / a > < span class = "w" > < / span > < span class = "k" > let< / span >
< a id = "__codelineno-3-29" name = "__codelineno-3-29" href = "#__codelineno-3-29" > < / a > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > queryEvenGang< / span > < span class = "p" > .< / span > < span class = "n" > getPeer< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-30" name = "__codelineno-3-30" href = "#__codelineno-3-30" > < / a > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > newcomer< / span > < span class = "p" > .< / span > < span class = "n" > dial< / span > < span class = "p" > (< / span > < span class = "n" > res< / span > < span class = "o" > [< / span > < span class = "n" > PeerId< / span > < span class = "o" > ]< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "n" > res< / span > < span class = "p" > .< / span > < span class = "n" > getAll< / span > < span class = "p" > (< / span > < span class = "n" > MultiAddress< / span > < span class = "p" > ),< / span > < span class = "w" > < / span > < span class = "n" > DumbCodec< / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-31" name = "__codelineno-3-31" href = "#__codelineno-3-31" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > writeLp< / span > < span class = "p" > (< / span > < span class = "s" > " Even Gang is sooo laaame! Odd Club rocks!" < / span > < span class = "p" > )< / span >
< a id = "__codelineno-3-32" name = "__codelineno-3-32" href = "#__codelineno-3-32" > < / a > < span class = "w" > < / span > < span class = "c" > # Or maybe not...< / span >
< a id = "__codelineno-3-33" name = "__codelineno-3-33" href = "#__codelineno-3-33" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > close< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-34" name = "__codelineno-3-34" href = "#__codelineno-3-34" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > conn< / span > < span class = "p" > .< / span > < span class = "n" > join< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-35" name = "__codelineno-3-35" href = "#__codelineno-3-35" > < / a > < span class = "w" > < / span > < span class = "n" > queryEvenGang< / span > < span class = "p" > .< / span > < span class = "n" > stop< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-36" name = "__codelineno-3-36" href = "#__codelineno-3-36" > < / a > < span class = "w" > < / span > < span class = "c" > # What can I say, some people just want to watch the world burn... Anyway< / span >
< a id = "__codelineno-3-37" name = "__codelineno-3-37" href = "#__codelineno-3-37" > < / a >
< a id = "__codelineno-3-38" name = "__codelineno-3-38" href = "#__codelineno-3-38" > < / a > < span class = "w" > < / span > < span class = "c" > # Stop all the discovery managers< / span >
< a id = "__codelineno-3-39" name = "__codelineno-3-39" href = "#__codelineno-3-39" > < / a > < span class = "w" > < / span > < span class = "k" > for< / span > < span class = "w" > < / span > < span class = "n" > d< / span > < span class = "w" > < / span > < span class = "ow" > in< / span > < span class = "w" > < / span > < span class = "n" > discManagers< / span > < span class = "p" > :< / span >
< a id = "__codelineno-3-40" name = "__codelineno-3-40" href = "#__codelineno-3-40" > < / a > < span class = "w" > < / span > < span class = "n" > d< / span > < span class = "p" > .< / span > < span class = "n" > stop< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-41" name = "__codelineno-3-41" href = "#__codelineno-3-41" > < / a > < span class = "w" > < / span > < span class = "n" > dm< / span > < span class = "p" > .< / span > < span class = "n" > stop< / span > < span class = "p" > ()< / span >
< a id = "__codelineno-3-42" name = "__codelineno-3-42" href = "#__codelineno-3-42" > < / a >
< a id = "__codelineno-3-43" name = "__codelineno-3-43" href = "#__codelineno-3-43" > < / a > < span class = "w" > < / span > < span class = "c" > # Stop all the switches< / span >
< a id = "__codelineno-3-44" name = "__codelineno-3-44" href = "#__codelineno-3-44" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > allFutures< / span > < span class = "p" > (< / span > < span class = "n" > switches< / span > < span class = "p" > .< / span > < span class = "n" > mapIt< / span > < span class = "p" > (< / span > < span class = "n" > it< / span > < span class = "p" > .< / span > < span class = "n" > stop< / span > < span class = "p" > ()))< / span >
< a id = "__codelineno-3-45" name = "__codelineno-3-45" href = "#__codelineno-3-45" > < / a > < span class = "w" > < / span > < span class = "n" > await< / span > < span class = "w" > < / span > < span class = "n" > allFutures< / span > < span class = "p" > (< / span > < span class = "n" > bootNode< / span > < span class = "p" > .< / span > < span class = "n" > stop< / span > < span class = "p" > (),< / span > < span class = "w" > < / span > < span class = "n" > newcomer< / span > < span class = "p" > .< / span > < span class = "n" > stop< / span > < span class = "p" > ())< / span >
< a id = "__codelineno-3-46" name = "__codelineno-3-46" href = "#__codelineno-3-46" > < / a >
< a id = "__codelineno-3-47" name = "__codelineno-3-47" href = "#__codelineno-3-47" > < / a > < span class = "n" > waitFor< / span > < span class = "p" > (< / span > < span class = "n" > main< / span > < span class = "p" > ())< / span >
< / code > < / pre > < / div >
2024-06-13 10:30:22 +00:00
2023-09-07 14:09:36 +00:00
< / article >
< / div >
2024-06-13 10:30:22 +00:00
< script > var target = document . getElementById ( location . hash . slice ( 1 ) ) ; target && target . name && ( target . checked = target . name . startsWith ( "__tabbed_" ) ) < / script >
2023-09-07 14:09:36 +00:00
< / div >
< / main >
< footer class = "md-footer" >
< div class = "md-footer-meta md-typeset" >
< div class = "md-footer-meta__inner md-grid" >
< div class = "md-copyright" >
Made with
< a href = "https://squidfunk.github.io/mkdocs-material/" target = "_blank" rel = "noopener" >
Material for MkDocs
< / a >
< / div >
< / div >
< / div >
< / footer >
< / div >
< div class = "md-dialog" data-md-component = "dialog" >
< div class = "md-dialog__inner md-typeset" > < / div >
< / div >
2024-06-13 10:30:22 +00:00
2024-09-19 12:37:19 +00:00
< script id = "__config" type = "application/json" > { "base" : ".." , "features" : [ "navigation.instant" , "search.highlight" ] , "search" : "../assets/javascripts/workers/search.6ce7567c.min.js" , "translations" : { "clipboard.copied" : "Copied to clipboard" , "clipboard.copy" : "Copy to clipboard" , "search.result.more.one" : "1 more on this page" , "search.result.more.other" : "# more on this page" , "search.result.none" : "No matching documents" , "search.result.one" : "1 matching document" , "search.result.other" : "# matching documents" , "search.result.placeholder" : "Type to start searching" , "search.result.term.missing" : "Missing" , "select.version" : "Select version" } } < / script >
2023-09-07 14:09:36 +00:00
2024-12-17 18:38:51 +00:00
< script src = "../assets/javascripts/bundle.88dd0f4e.min.js" > < / script >
2023-09-07 14:09:36 +00:00
< / body >
< / html >
