{"id":31766,"date":"2022-09-30T11:34:55","date_gmt":"2022-09-30T09:34:55","guid":{"rendered":"https:\/\/wallcrypt.com\/quest-ce-quun-smart-contract\/"},"modified":"2022-09-30T11:34:55","modified_gmt":"2022-09-30T09:34:55","slug":"quest-ce-quun-smart-contract","status":"publish","type":"post","link":"https:\/\/wallcrypt.com\/en\/quest-ce-quun-smart-contract\/","title":{"rendered":"Qu&#8217;est-ce qu&#8217;un smart contract ?"},"content":{"rendered":"<p>Si vous vous int\u00e9ressez \u00e0 la blockchain, vous avez certainement entendu parler des smart contracts. Dans cet article, nous vous expliquons ce que c&#8217;est, comment cela fonctionne et \u00e0 quoi cela peut servir dans la vie de tous les jours.<\/p>\n<h2>Qu&#8217;est-ce qu&#8217;un smart contract ?<\/h2>\n<p>Un <strong><a href=\"https:\/\/www.simplilearn.com\/tutorials\/blockchain-tutorial\/what-is-smart-contract\" target=\"_blank\" rel=\"noopener\">smart contract<\/a><\/strong> (ou contrat intelligent en fran\u00e7ais) est un protocole informatique qui ex\u00e9cute de mani\u00e8re automatique une t\u00e2che pr\u00e9cise lorsque les <strong>conditions<\/strong> d\u00e9finies par ceux qui l&#8217;ont programm\u00e9 sont remplies.<\/p>\n<p>Les contrats intelligents incluent les <strong>termes<\/strong> qui r\u00e9gissent un accord entre diff\u00e9rentes parties. Cela dit, tous les risques doivent \u00eatre consid\u00e9r\u00e9s afin que tout \u00e9v\u00e9nement de nature \u00e0 provoquer un conflit puisse d\u00e9boucher sur une solution convenue au pr\u00e9alable.<\/p>\n<p>Les smarts contrats sont d\u00e9velopp\u00e9s et ex\u00e9cut\u00e9s sur des blockchains destin\u00e9es \u00e0 cette usage. De nombreux r\u00e9seaux d\u00e9centralis\u00e9s prennent en charge cette fonctionnalit\u00e9, mais la plus r\u00e9pandue est <strong>Ethereum<\/strong>.<\/p>\n<p>Cela se justifie par le fait qu&#8217;Ethereum, \u00e9tant une blockchain <strong>Turing Complete<\/strong>, est en mesure de g\u00e9rer des contrats intelligents incluant des r\u00e8gles tr\u00e8s complexes.<\/p>\n<p>On distingue <a href=\"https:\/\/arxiv.org\/ftp\/arxiv\/papers\/1710\/1710.06372.pdf#:~:text=Ethereum%20blockchain%20is%20the%20most,smart%20contract%20and%20decentralised%20application.\" target=\"_blank\" rel=\"noopener\">deux types de smart contracts<\/a>, ceux dits <strong>d\u00e9terministes<\/strong> et ceux dits <strong>non d\u00e9terministes<\/strong>.<\/p>\n<p>Un contrat intelligent de nature d\u00e9terministe ne n\u00e9cessite aucune information d&#8217;une entit\u00e9 ext\u00e9rieure \u00e0 la blockchain.<\/p>\n<p>Un contrat intelligent non d\u00e9terministe d\u00e9pend quant \u00e0 lui d&#8217;informations provenant d&#8217;une source externe (<strong>oracles<\/strong> ou flux de donn\u00e9es).<\/p>\n<p>\u00c0 titre d&#8217;exemple, imaginons un contrat qui exige le respect de conditions m\u00e9t\u00e9orologiques sp\u00e9cifiques. Les informations correspondantes n&#8217;\u00e9tant pas pr\u00e9sentes sur la blockchain, une connexion \u00e0 un ou plusieurs oracles sera n\u00e9cessaire pour les relayer.<\/p>\n<p>???? Lisez aussi : <a href=\"https:\/\/wallcrypt.com\/quest-ce-quun-token-crypto\/\">Qu\u2019est-ce qu\u2019un token crypto<\/a> ?<\/p>\n<h2>Comment fonctionnent les smart contracts ?<\/h2>\n<p>Le principe de fonctionnement des smart contracts repose sur une structure conditionnelle : <em><strong>si<\/strong>\u00a0condition vraie, <strong>alors<\/strong> ex\u00e9cuter consigne<\/em>.<\/p>\n<p>Imaginons qu&#8217;Alice veuille acheter la maison de Bob pour quelques bitcoins. Le contrat intelligent contiendra la condition suivante : si Alice paie un montant X \u00e0 une p\u00e9riode lambda, alors elle deviendra propri\u00e9taire de la maison de Bob.<\/p>\n<p>Un compte s\u00e9questre sera cr\u00e9\u00e9 pour stocker l&#8217;argent d&#8217;Alice et cet argent ne sera vers\u00e9 \u00e0 Bob que lorsque ce dernier aura rempli les exigences pr\u00e9vues dans le contrat.<\/p>\n<p>Les n\u0153uds de la blockchain sont charg\u00e9s de v\u00e9rifier la validit\u00e9 des pr\u00e9requis sp\u00e9cifi\u00e9s dans le code et de r\u00e9aliser les actions associ\u00e9es. \u00c0 la fin de chaque transaction, le registre distribu\u00e9 est mis \u00e0 jour.<\/p>\n<p>Le smart contract pourrait \u00e9galement mentionner la restitution des actifs \u00e0 leurs propri\u00e9taires si les clauses ne sont pas respect\u00e9es \u00e0 une date pr\u00e9cise, ou encore un ajustement du prix de la maison en fonction de la conjoncture du march\u00e9 immobilier ou de celui des cryptomonnaies.<\/p>\n<p>???? D\u00e9couvrez notre article sur la finance d\u00e9centralis\u00e9e (DeFi)<\/p>\n<p>Dans le monde des affaires, les contrats sont utilis\u00e9s pour cr\u00e9er une obligation (l\u00e9gale) entre les parties contractantes.<\/p>\n<p>Dans le m\u00eame ordre d&#8217;id\u00e9es, les smart contracts permettent d&#8217;\u00e9tablir un climat de confiance entre entit\u00e9s distinctes dans un contexte o\u00f9 celle-ci n&#8217;est pas pr\u00e9alablement existante.<\/p>\n<p>Ils suppriment les interm\u00e9diaires qui arbitrent habituellement les transactions, ce qui permet de r\u00e9duire les erreurs humaines, qu&#8217;elles soient volontaires ou involontaires.<\/p>\n<p>Les contrats intelligents garantissent le transfert imm\u00e9diat des actifs impliqu\u00e9s dans les \u00e9changes une fois que les conditions sont remplies. Cela peut servir pour des domaines divers et vari\u00e9s.<\/p>\n<h3>L&#8217;assurance<\/h3>\n<p>De plus en plus de compagnies d&#8217;assurance utilisent des contrats intelligents pour automatiser leurs processus de souscription ou de r\u00e9clamation.<\/p>\n<p>Dans le cas de l&#8217;assurance voyage, par exemple, il peut s&#8217;agir de rembourser de mani\u00e8re automatique et instantann\u00e9e les voyageurs assur\u00e9s lorsque leurs vols sont retard\u00e9s de quelques heures.<\/p>\n<p>Gr\u00e2ce aux oracles, les contrats intelligents ont connaissance du statut des vols concern\u00e9s en temps r\u00e9el. Ainsi, sans que l&#8217;assur\u00e9 n&#8217;ait \u00e0 entreprendre de d\u00e9marches administratives, il recevra son indemnit\u00e9.<\/p>\n<h3>La gestion des droits musicaux<\/h3>\n<p>L&#8217;industrie musicale a beaucoup \u00e0 gagner de la technologie blockchain en g\u00e9n\u00e9ral et des contrats intelligents en particulier.<\/p>\n<p>Il serait par exemple int\u00e9ressant pour les d\u00e9tenteurs de droits musicaux de recevoir des paiements syst\u00e9matiquement chaque fois que leur musique est utilis\u00e9e \u00e0 des fins commerciales.<\/p>\n<p>Les smart contracts peuvent \u00e9galement \u00eatre envisag\u00e9s pour redistribuer les revenus g\u00e9n\u00e9r\u00e9s aux membres d&#8217;un groupe ou d&#8217;un label.<\/p>\n<h3>La cha\u00eene d&#8217;approvisionnement<\/h3>\n<p>L&#8217;un des secteurs qui s&#8217;acclimate rapidement \u00e0 l&#8217;utilisation de la blockchain est la supply chain (ou cha\u00eene d&#8217;approvisionnement en fran\u00e7ais). Il ne serait donc pas surprenant que les acteurs de cet \u00e9cosyst\u00e8me montrent un int\u00e9r\u00eat tout aussi fort pour les smart contracts.<\/p>\n<p>Une entreprise sp\u00e9cialis\u00e9e dans la commercialisation de boissons pourrait avoir besoin d&#8217;un smart contract qui redistribue un certain pourcentage du prix de vente de chacun de ces produits aux diff\u00e9rents maillons de la cha\u00eene de production et de commercialisation (fournisseur de mati\u00e8res premi\u00e8res, soci\u00e9t\u00e9 de conditionnement, compagnie de transport, distributeur, d\u00e9taillant, etc).<\/p>\n<p>Il serait \u00e9galement possible d&#8217;\u00e9crire un code informatique qui d\u00e9clenche une commande aupr\u00e8s des fournisseurs apr\u00e8s qu&#8217;un stock donn\u00e9 de marchandises ait \u00e9t\u00e9 \u00e9coul\u00e9 sur le march\u00e9.<\/p>\n<h3>Les votes en ligne<\/h3>\n<p>Les syst\u00e8mes \u00e9lectoraux centralis\u00e9s sont soumis \u00e0 de nombreuses contraintes qui favorisent la fraude : manque de transparence, urnes faciles \u00e0 bourrer, comptage des bulletins de vote peu fiable, etc.<\/p>\n<p>Si la blockchain apporte d\u00e9j\u00e0 une solution \u00e9l\u00e9mentaire \u00e0 ces probl\u00e8mes, les smarts contrats permettent d&#8217;<a href=\"https:\/\/www.simplilearn.com\/tutorials\/blockchain-tutorial\/what-is-smart-contract\" target=\"_blank\" rel=\"noopener\">optimiser davantage le processus<\/a>.<\/p>\n<p>En effet, gr\u00e2ce aux contrats intelligents, il est possible par exemple de faire voter uniquement les personnes inscrites sur les listes \u00e9lectorales et dont l&#8217;identit\u00e9 est v\u00e9rifi\u00e9e sur la blockchain, ou encore d&#8217;automatiser le d\u00e9pouillement.<\/p>\n<p>Les contrats intelligents peuvent \u00e9galement servir pour am\u00e9liorer la prise en charge sanitaire, le r\u00e8glement de pr\u00eats hypoth\u00e9caires, le commerce \u00e9lectronique et la gestion d&#8217;identit\u00e9 num\u00e9rique.\u00a0<\/p>\n<p>???? \u00c0 lire aussi : Qu&#8217;est-ce que le staking ?<\/p>\n<h2>Quels sont les avantages des smart contracts ?<\/h2>\n<p>Les avantages apport\u00e9s par les smart contracts sont plus ou moins les m\u00eames que ceux offerts par le blockchain. Il s&#8217;agit de :<\/p>\n<ul>\n<li>la <strong>rapidit\u00e9 des \u00e9changes<\/strong> : la d\u00e9sinterm\u00e9diation \u00e9limine les lenteurs administratives. En outre, les contrats intelligents ont acc\u00e8s aux donn\u00e9es d\u00e9cisionnelles en temps quasi r\u00e9el et sont ex\u00e9cutables ind\u00e9pendamment de toute intervention humaine.<\/li>\n<li>la <strong>r\u00e9duction des co\u00fbts<\/strong> : contrairement aux contrats traditionnels, les smart contracts ne requi\u00e8rent pas l&#8217;intervention d&#8217;un tiers de confiance, ce qui entra\u00eene par cons\u00e9quent une diminution des co\u00fbts de transaction.<\/li>\n<li>la <strong>s\u00e9curit\u00e9<\/strong> : toutes les op\u00e9rations effectu\u00e9es sur la blockchain sont chiffr\u00e9es et immuables. Plus le nombre de n\u0153uds ayant valid\u00e9 et enregistr\u00e9 des transactions est \u00e9lev\u00e9, plus il devient difficile pour les pirates de corrompre le syst\u00e8me (attaques \u00e0 51%) et modifier les donn\u00e9es.<\/li>\n<\/ul>\n<p>???? Vous pourriez aimer notre article sur les airdrops crypto<\/p>\n<p>&nbsp;<\/p>\n<p>En raison des nombreux avantages offerts et des diverses utilisations possibles avec les contrats intelligents, la disponibilit\u00e9 de cette fonctionnalit\u00e9 devient un facteur d\u00e9cisif au moment de choisir quelle blockchain utiliser.<\/p>\n<p>Cela explique en partie la popularit\u00e9 grandissante d&#8217;Ethereum aupr\u00e8s des d\u00e9veloppeurs et la ru\u00e9e des investisseurs vers l&#8217;Ether (ETH), la cryptomonnaie native de cette blockchain.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Si vous vous int\u00e9ressez \u00e0 la blockchain, vous avez certainement entendu parler des smart contracts. Dans cet article, nous vous expliquons ce que c&#8217;est, comment cela fonctionne et \u00e0 quoi cela peut servir dans la vie de tous les jours. Qu&#8217;est-ce qu&#8217;un smart contract ? Un smart contract (ou contrat intelligent en fran\u00e7ais) est un [&hellip;]<\/p>\n","protected":false},"author":43,"featured_media":10395,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"jnews-multi-image_gallery":[],"jnews_single_post":{"source_name":"","source_url":"","via_name":"","via_url":"","override_template":"0","override":[{"single_blog_custom":"","parallax":"0","fullscreen":"0","sidebar":"","second_sidebar":"","sticky_sidebar":"0","share_position":"","share_float_style":"","show_share_counter":"0","show_view_counter":"0","show_featured":"0","show_post_meta":"0","show_post_author":"0","show_post_author_image":"0","show_post_date":"0","post_date_format":"","post_date_format_custom":"","show_post_category":"0","show_post_reading_time":"0","post_reading_time_wpm":"","show_zoom_button":"0","zoom_button_out_step":"1","zoom_button_in_step":"1","show_post_tag":"0","show_prev_next_post":"0","show_popup_post":"0","number_popup_post":"1","show_author_box":"0","show_post_related":"0","show_inline_post_related":"0"}],"override_image_size":"0","image_override":[{"single_post_thumbnail_size":"","single_post_gallery_size":""}],"trending_post":"0","trending_post_position":"","trending_post_label":"","sponsored_post":"0","sponsored_post_label":"","sponsored_post_name":"","sponsored_post_url":"","sponsored_post_logo_enable":"0","sponsored_post_logo":"","sponsored_post_desc":""},"jnews_primary_category":{"id":""},"footnotes":""},"categories":[264,260,240],"tags":[465,268,462,467,335,463,461,464,466],"class_list":["post-31766","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-business-intelligence-blockchain-fundamentals","category-rubrique-business-intelligence-en","category-wallcrypt-en","tag-assurance-en","tag-blockchain-en","tag-ethereum-en","tag-gestion-des-droits-en","tag-smart-contract-en","tag-supply-chain-en","tag-turing-en","tag-turing-complete-en","tag-vote-en"],"acf":[],"featured_image_urls_v2":{"full":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract.jpg",848,565,false],"thumbnail":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-150x150.jpg",150,150,true],"medium":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-300x200.jpg",300,200,true],"medium_large":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-768x512.jpg",768,512,true],"large":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract.jpg",848,565,false],"1536x1536":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract.jpg",848,565,false],"2048x2048":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract.jpg",848,565,false],"widget-thumbnail":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-75x75.jpg",75,75,true],"rpwe-thumbnail":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-45x45.jpg",45,45,true],"profile_24":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-24x24.jpg",24,24,true],"profile_48":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-48x48.jpg",48,48,true],"profile_96":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-96x96.jpg",96,96,true],"profile_150":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-150x150.jpg",150,150,true],"profile_300":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-300x300.jpg",300,300,true],"jnews-360x180":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-360x180.jpg",360,180,true],"jnews-750x375":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-750x375.jpg",750,375,true],"jnews-1140x570":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract.jpg",848,565,false],"jnews-120x86":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-120x86.jpg",120,86,true],"jnews-350x250":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-350x250.jpg",350,250,true],"jnews-750x536":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-750x536.jpg",750,536,true],"jnews-1140x815":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract.jpg",848,565,false],"jnews-360x504":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-360x504.jpg",360,504,true],"jnews-75x75":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract-75x75.jpg",75,75,true],"jnews-350x350":["https:\/\/wallcrypt.com\/wp-content\/uploads\/2021\/01\/quest-ce-quun-smart-contract.jpg",350,233,false],"jnews-featured-75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vous vous int\u00e9ressez \u00e0 la blockchain, vous avez certainement entendu parler des smart contracts. Dans cet article, nous vous expliquons ce que c&#8217;est, comment cela fonctionne et \u00e0 quoi cela peut servir dans la vie de tous les jours. Qu&#8217;est-ce qu&#8217;un smart contract ? Un smart contract (ou contrat intelligent en fran\u00e7ais) est un protocole informatique qui ex\u00e9cute de mani\u00e8re automatique une t\u00e2che pr\u00e9cise lorsque les conditions d\u00e9finies par ceux qui l&#8217;ont programm\u00e9 sont remplies. Les contrats intelligents incluent les termes qui r\u00e9gissent un accord entre diff\u00e9rentes parties. Cela dit, tous les risques doivent \u00eatre consid\u00e9r\u00e9s afin que tout&hellip;<\/p>\n","category_list_v2":"<a href=\"https:\/\/wallcrypt.com\/en\/wallcrypt\/rubrique-business-intelligence-en\/business-intelligence-blockchain-fundamentals\/\" rel=\"category tag\">Business Intelligence - Blockchain Fundamentals<\/a>, <a href=\"https:\/\/wallcrypt.com\/en\/wallcrypt\/rubrique-business-intelligence-en\/\" rel=\"category tag\">Rubrique Business Intelligence<\/a>, <a href=\"https:\/\/wallcrypt.com\/en\/wallcrypt\/wallcrypt-en\/\" rel=\"category tag\">Wallcrypt<\/a>","author_info_v2":{"name":"Junie Maffock","url":"https:\/\/wallcrypt.com\/en\/author\/junie\/"},"comments_num_v2":"0 comments","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce qu&#039;un smart contract ? - Wallcrypt vous explique tout !<\/title>\n<meta name=\"description\" content=\"Un smart contract est un protocole informatique qui ex\u00e9cute automatiquement une t\u00e2che pr\u00e9cise lorsque les conditions d\u00e9finies sont remplies.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wallcrypt.com\/en\/quest-ce-quun-smart-contract\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu&#039;est-ce qu&#039;un smart contract ? 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