{"id":7052,"date":"2024-09-20T00:50:18","date_gmt":"2024-09-19T22:50:18","guid":{"rendered":"https:\/\/web3factory.net\/fr\/posts\/oracles-the-intermediary-between-real-world-data-and-blockchain\/"},"modified":"2025-02-08T21:34:28","modified_gmt":"2025-02-08T20:34:28","slug":"les-oracles-intermediaires-blockchain-monde-reel","status":"publish","type":"post","link":"https:\/\/web3factory.net\/fr\/posts\/les-oracles-intermediaires-blockchain-monde-reel\/","title":{"rendered":"Les oracles : interm\u00e9diaires blockchain \/ monde r\u00e9el"},"content":{"rendered":"<span class=\"simplefavorite-button\" data-postid=\"7052\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"box-shadow:none;-webkit-box-shadow:none;-moz-box-shadow:none;\"><label class=\"favoritebtn\"><i aria-hidden=\"true\" class=\"fas fa-bookmark favoritesize\"><\/i><span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-custom\">\u200e\u200e \u200e \u200e Ajouter \u00e0 ma list\u200ee \u200e \u200e <\/span><\/label><\/span>\n<p>Les oracles agissent comme des ponts, connectant les smart contracts sur la <span tabindex='0' class='glossary-item-container'>blockchain<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Blockchain<\/span> <span class='glossary-item-description'>Un registre public et immuable de transactions cryptographiques, organis\u00e9 en blocs.<\/span><\/span><\/span> \u00e0 des donn\u00e9es externes. Ils peuvent r\u00e9cup\u00e9rer, v\u00e9rifier et transmettre des informations provenant de sources telles que des bases de donn\u00e9es, des API et d&rsquo;autres r\u00e9seaux, les rendant accessibles sur la cha\u00eene.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-comment-fonctionnent-ils\"><strong><span style=\"text-decoration: underline;\">Comment fonctionnent-ils ?<\/span><\/strong><\/h3>\n\n\n\n<p>Les oracles permettent la cr\u00e9ation de smart contracts hybrides, o\u00f9 le code on-chain et l&rsquo;infrastructure off-chain sont combin\u00e9s pour soutenir des applications d\u00e9centralis\u00e9es (dApps) qui r\u00e9agissent \u00e0 des \u00e9v\u00e9nements du monde r\u00e9el et interagissent avec des syst\u00e8mes traditionnels.<\/p>\n\n\n\n<p>En fournissant un acc\u00e8s Web3 \u00e0 des sources de donn\u00e9es externes (off-chain) et \u00e0 des syst\u00e8mes existants, les oracles permettent aux applications d&rsquo;interagir avec un environnement ext\u00e9rieur \u00e0 la blockchain, facilitant ainsi des applications du monde r\u00e9el. Ces donn\u00e9es peuvent inclure les prix des actifs, des chiffres macro\u00e9conomiques, des r\u00e9sultats sportifs, etc.<\/p>\n\n\n\n<p>Leur r\u00f4le est crucial car, dans la finance d\u00e9centralis\u00e9e (<span tabindex='0' class='glossary-item-container'>DeFi<span class='glossary-item-hidden-content'><span class='glossary-item-header'>DeFi<\/span> <span class='glossary-item-description'>Les services DeFi utilisent des smart contracts, des protocoles d\u00e9centralis\u00e9s et des jetons pour offrir une gamme de services financiers qui peuvent parfois remplacer ceux propos\u00e9s par les banques, tels que le pr\u00eat\/emprunt, la gestion d'actifs, l'assurance ou l'\u00e9change d'actifs.<\/span><\/span><\/span>), qui repose sur des informations off-chain, il est essentiel de s&rsquo;appuyer sur un m\u00e9canisme <span tabindex='0' class='glossary-item-container'>oracle<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Oracle<\/span> <span class='glossary-item-description'>Un service qui fournit des donn\u00e9es hors cha\u00eene \u00e0 une blockchain, permettant aux smart contracts d'interagir avec des informations du monde r\u00e9el.<\/span><\/span><\/span> fiable, fluide, inviolable et non manipulable.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"284\" src=\"https:\/\/web3factory.net\/wp-content\/uploads\/2024\/09\/oracle.png\" alt=\"\" class=\"wp-image-4859\" srcset=\"https:\/\/web3factory.net\/wp-content\/uploads\/2024\/09\/oracle.png 750w, https:\/\/web3factory.net\/wp-content\/uploads\/2024\/09\/oracle-300x114.png 300w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-types-d-oracles\"><strong><span style=\"text-decoration: underline;\">Types d&rsquo;Oracles<\/span><\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Oracles de Donn\u00e9es :<\/strong> Fournissent des donn\u00e9es externes aux smart contracts, telles que les prix des cryptomonnaies ou les taux de change.<\/li>\n\n\n\n<li><strong>Oracles de Calcul :<\/strong> Effectuent des calculs externes et renvoient les r\u00e9sultats aux smart contracts.<\/li>\n\n\n\n<li><strong>Oracles Mat\u00e9riels :<\/strong> Connectent des smart contracts \u00e0 des dispositifs physiques, permettant une interaction avec le monde r\u00e9el.<\/li>\n<\/ul>\n\n\n\n<p>Chainlink, avec son <span tabindex='0' class='glossary-item-container'>token<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Token<\/span> <span class='glossary-item-description'>Un actif num\u00e9rique \u00e9mis sur une blockchain qui repr\u00e9sente divers services publics, droits ou titres.<\/span><\/span><\/span> LINK, est l&rsquo;oracle le plus ancien et le plus connu de l&rsquo;\u00e9cosyst\u00e8me. Il repr\u00e9sente plus de 75 % des projets d&rsquo;oracles et est pr\u00e9sent dans de grands projets DeFi comme AAVE.<\/p>\n\n\n\n<p>Comme de nombreux projets, il est important de faire la distinction entre le projet et son jeton ainsi que leurs utilisations respectives. LINK est souvent critiqu\u00e9 car son jeton est per\u00e7u comme ayant une utilit\u00e9 limit\u00e9e, au-del\u00e0 des potentielles ventes massives sur le march\u00e9 par son \u00e9quipe.<\/p>\n\n\n\n<p>D&rsquo;autres oracles notables incluent Band Protocol, Pyth Network, DIA, et plus encore. Pour comparer les diff\u00e9rentes approches des protocoles et leurs jetons, cet article peut \u00eatre utile : <a href=\"https:\/\/hackernoon.com\/oracles-revenue-and-tokenomics\"> Hacker Noon &#8211; Oracles Revenue and Tokenomics<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-reseaux-oracle-decentralises\"><strong><span style=\"text-decoration: underline;\">R\u00e9seaux Oracle D\u00e9centralis\u00e9s<\/span><\/strong><\/h3>\n\n\n\n<p>Les oracles doivent \u00eatre fiables et s\u00e9curis\u00e9s pour garantir l&rsquo;int\u00e9grit\u00e9 des smart contracts. Ils doivent r\u00e9sister \u00e0 la manipulation et aux fausses informations, garantissant que les smart contracts re\u00e7oivent des donn\u00e9es pr\u00e9cises et \u00e0 jour.<\/p>\n\n\n\n<p>Un oracle centralis\u00e9, s&rsquo;il subit une d\u00e9connexion spontan\u00e9e, pourrait entra\u00eener la perte d&rsquo;acc\u00e8s \u00e0 l&rsquo;information d&rsquo;un protocole DeFi et potentiellement perturber compl\u00e8tement le projet, compte tenu de la nature automatis\u00e9e de ces syst\u00e8mes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-cas-d-utilisation\"><strong><span style=\"text-decoration: underline;\">Cas d&rsquo;Utilisation<\/span><\/strong><\/h3>\n\n\n\n<p>Imaginez un <span tabindex='0' class='glossary-item-container'>smart contract<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Smart Contract<\/span> <span class='glossary-item-description'>Un contrat auto-ex\u00e9cutoire dont les termes sont directement inscrits dans le code d'une blockchain.<\/span><\/span><\/span> pour une assurance m\u00e9t\u00e9o. Si la temp\u00e9rature d\u00e9passe un certain seuil, le contrat s&rsquo;ex\u00e9cute automatiquement et une compensation est vers\u00e9e. Les oracles jouent un r\u00f4le crucial ici en fournissant des donn\u00e9es m\u00e9t\u00e9o pr\u00e9cises et en temps r\u00e9el aux smart contracts, permettant une ex\u00e9cution fluide et automatique bas\u00e9e sur les conditions m\u00e9t\u00e9orologiques r\u00e9elles.<\/p>\n\n\n\n<p>D&rsquo;autres exemples incluent : la tarification des actifs pour la finance, le caract\u00e8re al\u00e9atoire pour les jeux, les capteurs IoT pour les cha\u00eenes d&rsquo;approvisionnement, la v\u00e9rification d&rsquo;identit\u00e9 \u00e0 des fins gouvernementales, etc.<\/p>\n\n\n\n<p>Dans l&rsquo;univers DeFi, les oracles servent, entre autres, les applications suivantes avec des exemples de projets utilisant Chainlink :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Flux de Prix :<\/strong> March\u00e9s mon\u00e9taires (AAVE)<\/li>\n\n\n\n<li><strong>Prix Sous-Jacent :<\/strong> Peg de <span tabindex='0' class='glossary-item-container'>stablecoin<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Stablecoin<\/span> <span class='glossary-item-description'>Une crypto-monnaie li\u00e9e \u00e0 un actif stable, tel qu'une monnaie fiduciaire, afin de minimiser la volatilit\u00e9.<\/span><\/span><\/span>, valeurs synth\u00e9tiques (Synthetix)<\/li>\n\n\n\n<li><strong>D\u00e9termination du Prix :<\/strong> Contrats \u00e0 terme et options (Lyra)<\/li>\n\n\n\n<li><strong>Preuve de R\u00e9serve on-chain :<\/strong> (RenBTC)<\/li>\n\n\n\n<li><strong>Gestion Automatis\u00e9e d&rsquo;Actifs :<\/strong> (Pickle Finance)<\/li>\n<\/ul>\n\n\n\n<p>Des innovations telles que le CCIP (Cross Chain Interoperability Protocol) permettent le transfert d&rsquo;informations et\/ou de jetons entre les cha\u00eenes (Open Source).<\/p>\n\n\n\n<p>Pour explorer davantage des cas du monde r\u00e9el, voici une liste de solutions fournies par Chainlink : <a href=\"https:\/\/blog.chain.link\/smart-contract-use-cases\/\"> Chainlink Blog &#8211; Smart Contract Use Cases<\/a>.<\/p>\n\n\n\n<p><strong><span style=\"text-decoration: underline;\">Conclusion<\/span><\/strong><\/p>\n\n\n\n<p>Les oracles sont essentiels au fonctionnement actuel de la DeFi et \u00e0 sa connexion au monde r\u00e9el, apportant avec eux un ensemble de questions :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les oracles peuvent-ils se d\u00e9velopper suffisamment sans cr\u00e9er de probl\u00e8mes de s\u00e9curit\u00e9 (pas de latence pendant une forte volatilit\u00e9) ou \u00e9conomiques (co\u00fbts li\u00e9s au traitement des big data et frais de gaz inh\u00e9rents) ?<\/li>\n\n\n\n<li>Les incentives sont-elles suffisantes pour faire fonctionner les oracles de mani\u00e8re optimis\u00e9e et s\u00e9curis\u00e9e ?<\/li>\n\n\n\n<li>Les oracles sont-ils suffisamment d\u00e9centralis\u00e9s pour \u00e9viter les attaques, les erreurs et ainsi ne pas risquer de compromettre le fonctionnement de la finance d\u00e9centralis\u00e9e ?<\/li>\n<\/ul>\n\n\n\n<p>Dans ce contexte, certains pensent que l&rsquo;avenir de la DeFi devrait se d\u00e9velopper sans d\u00e9pendances externes, comme le montrent des projets tels qu&rsquo;Ajna, Ethereum Credit Guild, Metastreet\u2019s Automated Tranche <span tabindex='0' class='glossary-item-container'>Maker<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Maker<\/span> <span class='glossary-item-description'>Une entit\u00e9 qui fournit de la liquidit\u00e9 \u00e0 un march\u00e9 en pla\u00e7ant des ordres limit\u00e9s.<\/span><\/span><\/span> et Blur\/Paradigm\u2019s Blend\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"<p>D\u00e9couvrez les oracles et comment ils connectent la blockchain aux donn\u00e9es du monde r\u00e9el pour les smart contracts<\/p>\n","protected":false},"author":2,"featured_media":13053,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[65,86,84],"tags":[],"class_list":{"0":"post-7052","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-capital-use","9":"category-defi"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v23.5) - 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