{"id":4844,"date":"2020-12-09T23:33:52","date_gmt":"2020-12-09T20:33:52","guid":{"rendered":"https:\/\/alfacash.blog\/?p=4844"},"modified":"2024-02-19T21:52:42","modified_gmt":"2024-02-19T18:52:42","slug":"que-sont-les-contrats-intelligents-a-quoi-ils-servent","status":"publish","type":"post","link":"https:\/\/alfacash.blog\/fr\/2020\/12\/09\/que-sont-les-contrats-intelligents-a-quoi-ils-servent\/","title":{"rendered":"Que diable sont les contrats intelligents? Un guide facile"},"content":{"rendered":"<p>Vous savez probablement d\u00e9j\u00e0 ce qu&#039;est un contrat (traditionnel), n&#039;est-ce pas? Souvenons-nous-en, de toute fa\u00e7on. Selon le dictionnaire Merriam-Webster, un contrat est \u00abun accord contraignant entre deux ou plusieurs personnes ou parties, en particulier une juridiquement ex\u00e9cutoire\u00bb. Eh bien, quelle est la premi\u00e8re chose qui vous vient \u00e0 l&#039;esprit lorsque nous parlons de \u00abcontrats intelligents\u00bb?<\/p>\n\n\n\n<p>Le document est-il sur une tablette, peut-\u00eatre? Est-ce maintenant un robot? Une IA, derri\u00e8re un ordinateur? C&#039;est juste\u2026 connect\u00e9 \u00e0 Internet? Pas exactement. Si vous v\u00e9rifiez d&#039;autres sources (comme le vieux Wikip\u00e9dia fiable), elles diront quelque chose comme <strong>un contrat intelligent est un \u00abprotocole num\u00e9rique\u00bb ou un \u00abprogramme informatique\u00bb qui ex\u00e9cute automatiquement ses conditions pr\u00e9d\u00e9termin\u00e9es<\/strong> lorsque ceux-ci sont remplis.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"482\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-1024x482.jpg\" alt=\"\" class=\"wp-image-4850\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-1024x482.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-300x141.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-150x71.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-18x8.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-270x127.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-770x363.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-1078x508.jpg 1078w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-900x424.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-370x174.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-554x261.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-306x144.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-260x122.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-87x41.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Image par Gerd Altmann de Pixabay<\/figcaption><\/figure><\/div>\n\n\n\n<p>Bien, hein\u2026? Et que diable cela signifie-t-il? Eh bien, nous pouvons l&#039;expliquer de cette fa\u00e7on: un contrat intelligent n&#039;est pas quelque chose que vous pouvez toucher ou m\u00eame voir correctement. Surtout, vous ne verrez que les r\u00e9sultats, un peu comme avec les fils \u00e0 l&#039;int\u00e9rieur de votre t\u00e9l\u00e9viseur. La diff\u00e9rence est que cette fois, ces r\u00e9sultats sont enti\u00e8rement num\u00e9riques car il s&#039;agit d&#039;un accord num\u00e9rique bas\u00e9 sur <a href=\"https:\/\/alfacash.blog\/2020\/08\/30\/dummies-what-is-blockchain-how-it-works\/\" target=\"_blank\" rel=\"noreferrer noopener\">une blockchain<\/a>, \u00e9crit avec un code de calcul pour faire respecter les conditions pr\u00e9c\u00e9dentes convenues par les parties. Vous pouvez le consid\u00e9rer comme un contrat ou une garantie automatique, qui n&#039;a pas besoin de papier, d&#039;avocat, de notaire ou d&#039;interm\u00e9diaires en g\u00e9n\u00e9ral.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Alors\u2026 comment les contrats intelligents fonctionnent-ils pour votre gars ordinaire?<\/strong><\/h2>\n\n\n\n<p>La r\u00e9ponse courte est avec des applications ou des outils num\u00e9riques. Si vous ne savez pas comment \u00e9crire du code (comme les d\u00e9veloppeurs ou les ing\u00e9nieurs en informatique), vous ne serez pas charg\u00e9 de les cr\u00e9er, alors ne vous inqui\u00e9tez pas. Laissez cette t\u00e2che aux experts. <strong>Pour les utiliser, il vous suffit de choisir une application ou une plate-forme bas\u00e9e sur un contrat intelligent (g\u00e9n\u00e9ralement des applications d\u00e9centralis\u00e9es)<\/strong> et allez-y sur votre appareil (mobile ou bureau).<\/p>\n\n\n\n<p>Nous pouvons cependant parler un peu du fonctionnement interne d&#039;un contrat intelligent. Tout d&#039;abord, v\u00e9rifions une image pour vous montrer \u00e0 quoi ils ressemblent. Spoiler: c&#039;est un peu ennuyeux. C&#039;est juste un tas de code.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"331\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-1024x331.jpg\" alt=\"\" class=\"wp-image-4851\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-1024x331.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-300x97.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-150x49.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-18x6.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-270x87.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-770x249.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-1170x378.jpg 1170w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-900x291.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-370x120.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-554x179.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-306x99.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-260x84.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-87x28.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Exemple de contrat intelligent. Source: Ethereum.org<\/figcaption><\/figure><\/div>\n\n\n\n<p>Nous pouvons \u00e9galement v\u00e9rifier leurs donn\u00e9es sur un <a href=\"https:\/\/etherscan.io\/address\/0xf4985070ce32b6b1994329df787d1acc9a2dd9e2\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">explorateur de blockchain<\/a> (une page Web accessible), si elle est publique, bien s\u00fbr. Les banques d\u00e9veloppent leurs propres applications avec des contrats intelligents, donc ceux-ci ne sont pas publics. Mais on peut v\u00e9rifier, par exemple, un contrat moyen sur Ethereum.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"450\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-1024x450.jpg\" alt=\"\" class=\"wp-image-4852\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-1024x450.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-300x132.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-150x66.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-18x8.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-270x119.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-770x338.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-1157x508.jpg 1157w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-900x395.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-370x163.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-554x243.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-306x134.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-260x114.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-87x38.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan.jpg 1168w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Exemple de donn\u00e9es publiques dans un contrat intelligent. Source: Etherscan<\/figcaption><\/figure><\/div>\n\n\n\n<p>On d\u00e9couvre ici une chose importante sur les contrats intelligents. <strong>Outre le code, ils sont constitu\u00e9s de transactions et d&#039;un solde mon\u00e9taire. <\/strong>Cependant, cela ne signifie pas que la seule et unique utilisation pour eux doit \u00eatre financi\u00e8re: les transactions peuvent \u00e9galement repr\u00e9senter uniquement des informations. En ce qui concerne l&#039;\u00e9quilibre, la v\u00e9rit\u00e9 est que les contrats intelligents d\u00e9centralis\u00e9s n\u00e9cessitent des frais pour fonctionner (g\u00e9n\u00e9ralement sous forme de crypto-monnaies), destin\u00e9s au <a href=\"https:\/\/alfacash.blog\/2020\/08\/25\/cryptocurrency-mining-dummies-how-works\/\" target=\"_blank\" rel=\"noreferrer noopener\">mineurs ou validateurs<\/a> de la blockchain.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Le processus est comme\u2026<\/strong><\/h2>\n\n\n\n<p>\u00c0 l&#039;int\u00e9rieur de Ethereum, par exemple, un contrat est juste <a href=\"https:\/\/ethereum.org\/en\/developers\/docs\/smart-contracts\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">un autre type d&#039;adresse<\/a> (portefeuille \/ compte), avec solde et transactions. Mais c&#039;est une sorte d&#039;adresse collective, con\u00e7ue pour fonctionner comme un pont entre deux ou plusieurs parties, avec des conditions pr\u00e9d\u00e9finies. Par cons\u00e9quent, cette adresse n&#039;est pas contr\u00f4l\u00e9e par un seul utilisateur, mais par ses propres conditions pr\u00e9alablement convenues, appliqu\u00e9es par l&#039;ensemble du r\u00e9seau Ethereum.<\/p>\n\n\n\n<p><strong>Le d\u00e9clencheur pour que cette adresse fasse quelque chose (comme effectuer automatiquement une transaction d&#039;argent) est un \u00e9v\u00e9nement attendu par les parties<\/strong>. Cela peut \u00eatre une vente, une date de paiement, un enregistrement de quelque chose, un nouveau produit en ligne, <a href=\"https:\/\/alfacash.blog\/2020\/08\/22\/bitcoin-to-the-moon-5-predictions-for-2021-and-beyond\/\" target=\"_blank\" rel=\"noreferrer noopener\">un changement de prix<\/a>, un sondage, ou m\u00eame les r\u00e9sultats sportifs.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"575\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-1024x575.jpg\" alt=\"\" class=\"wp-image-4853\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-1024x575.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-300x169.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-150x84.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-18x10.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-270x152.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-770x433.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-904x508.jpg 904w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-900x506.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-370x208.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-554x311.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-306x172.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-260x146.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-87x49.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Image par kinkate de Pixabay<\/figcaption><\/figure><\/div>\n\n\n\n<p>Le contrat recherche les informations fournies \u00e0 son sujet par les parties concern\u00e9es ou par un \u00aboracle\u00bb (un logiciel qui consulte des sources externes), et agit en cons\u00e9quence, suivant ses conditions pr\u00e9d\u00e9finies.<\/p>\n\n\n\n<p><strong>Pour r\u00e9sumer, voici le processus:<\/strong><\/p>\n\n\n\n<p>1. Les parties n\u00e9gocient les termes du contrat (ou l&#039;entreprise \/ le d\u00e9veloppeur les rend publics pour tous ceux qui souhaitent adh\u00e9rer).<br>2. Le d\u00e9veloppeur construit le protocole dans une blockchain s\u00e9lectionn\u00e9e (<a href=\"https:\/\/alfacash.blog\/2020\/11\/14\/ethereum-2-new-features-prices-more-ethereum-chains\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ethereum<\/a>, EOS, Tron, Cardano, RSK, etc.), en utilisant les conditions convenues.<br>3. Le contrat et ses termes sont repr\u00e9sent\u00e9s \u00e0 l&#039;int\u00e9rieur d&#039;une adresse d&#039;une telle blockchain.<br>4. L&#039;\u00e9v\u00e9nement se produit.<br>5. Le contrat effectue les transactions en fonction du r\u00e9sultat dudit \u00e9v\u00e9nement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>Alice et Bob ont utilis\u00e9 des contrats intelligents<\/strong><\/h2>\n\n\n\n<p>Bien s\u00fbr, nous avons besoin d&#039;un exemple classique avec Alice et Bob. Disons qu&#039;Alice va parier $500 avec Bob sur le <a href=\"https:\/\/alfacash.blog\/2020\/11\/28\/bitcoin-price-will-reach-60k-mid-2021-new-study\/\" target=\"_blank\" rel=\"noreferrer noopener\">Prix Bitcoin<\/a> pour le week-end prochain. Bob pense que ce sera jusqu&#039;\u00e0 X dollars, tandis qu&#039;Alice pense que ce sera jusqu&#039;\u00e0 X dollars.<\/p>\n\n\n\n<p>Ainsi, ils d\u00e9cident de construire un contrat intelligent (faisant appel \u00e0 un d\u00e9veloppeur ou \u00e0 une plateforme en tant que service) et fixent leurs conditions. <strong>Les fonds ($500) seront d\u00e9pos\u00e9s en crypto-monnaie au contrat,<\/strong> et si le prix de Bitcoin augmente X pour le week-end suivant, le contrat transf\u00e9rera automatiquement les fonds \u00e0 Bob. Si le prix de <a href=\"https:\/\/alfacash.blog\/2020\/11\/25\/how-to-start-bitcoin-cryptos-5-steps\/\" target=\"_blank\" rel=\"noreferrer noopener\">Bitcoin<\/a> descend X, les fonds iront \u00e0 l&#039;adresse d&#039;Alice. Et c&#039;est tout.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-1024x682.jpg\" alt=\"Bitcoin-15000-course de taureaux\" class=\"wp-image-4624\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-1024x682.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-150x100.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-260x173.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-87x58.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-300x200.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-18x12.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-770x513.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-762x508.jpg 762w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-773x515.jpg 773w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-370x247.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-554x369.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-306x204.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-368x245.jpg 368w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p>Maintenant, une autre situation, cette fois impliquant certains Internet des objets (IoT). Alice veut louer sa maison \u00e0 Bob et elle a l&#039;avantage d&#039;une serrure intelligente install\u00e9e, contr\u00f4l\u00e9e num\u00e9riquement pour ouvrir et fermer la porte. Alors, ils construisent un contrat intelligent et fixent ces conditions: Bob paiera X dollars en crypto par mois.<\/p>\n\n\n\n<p>S&#039;il ne le fait pas pendant deux mois, <strong>le contrat ordonnera \u00e0 la serrure intelligente de garder la porte (et l&#039;acc\u00e8s \u00e0 la maison) ferm\u00e9es.<\/strong> De cette fa\u00e7on, Alice s&#039;assure de recevoir d\u00fbment le chiffre convenu, et Bob n&#039;a plus besoin de rassembler plus de documents ou de conditions requises pour Alice.<\/p>\n\n\n\n<p>Et bien, c&#039;est un type de contrat, apr\u00e8s tout. L&#039;imagination est la limite.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Quelques utilisations populaires des contrats intelligents<\/strong><\/h2>\n\n\n\n<p>Il existe d\u00e9j\u00e0 des centaines d&#039;applications bas\u00e9es sur des contrats intelligents, avec de nombreuses cat\u00e9gories et fonctions. \u00c9changes, jeux d&#039;argent, jeux, investissement, immobilier, sant\u00e9, marketplaces, sondages\u2026 ils fonctionnent tous avec des contrats intelligents.<\/p>\n\n\n\n<p>Peut-\u00eatre que certains de ces Dapp (qui ne sont pas en soi des contrats intelligents, mais qui fonctionnent avec eux), peuvent vous sonner une cloche. CryptoKitties (objets de collection), Uniswap (\u00e9change), Aragon (gouvernance), District0x (march\u00e9s et communaut\u00e9s), Augur (march\u00e9 de pr\u00e9diction), Synthetix (pour les actifs synth\u00e9tiques), Axie Infinity (jeux), Grid + (\u00e9nergie) et Actifit (sant\u00e9) ne sont que des exemples. <strong>Selon <a href=\"https:\/\/www.stateofthedapps.com\/dapps\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">L&#039;\u00e9tat des Dapps<\/a>, il y en a plus de 2 500.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"730\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-1024x730.jpg\" alt=\"\" class=\"wp-image-4854\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-1024x730.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-300x214.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-150x107.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-18x12.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-253x180.jpg 253w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-723x515.jpg 723w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-713x508.jpg 713w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-370x264.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-554x395.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-306x218.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-344x245.jpg 344w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-260x185.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-87x62.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Image par Edar de Pixabay<\/figcaption><\/figure><\/div>\n\n\n\n<p>Et vous savez quoi d&#039;autre fonctionne avec ces contrats? La totalit\u00e9 <a href=\"https:\/\/alfacash.blog\/2020\/09\/09\/how-to-make-thousands-dollars-defi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Finance d\u00e9centralis\u00e9e (DeFi)<\/a> \u00e9cosyst\u00e8me, un boom ces jours-ci. On y trouve de nombreux outils d&#039;investissement (pour <a href=\"https:\/\/alfacash.blog\/2020\/10\/07\/meet-best-performing-bold-platforms-yield-farming\/\" target=\"_blank\" rel=\"noreferrer noopener\">agriculture de rendement<\/a>, principalement), des pr\u00eats, des assurances, de l&#039;\u00e9pargne, etc. Des plates-formes telles que Yearn Finance, Compound, UMA, Maker, Curve et <a href=\"https:\/\/alfacash.blog\/2020\/11\/22\/defi-protocol-pickle-finance-suffered-19m-hack-loses-value\/\" target=\"_blank\" rel=\"noreferrer noopener\">Finance Pickle<\/a> appartiennent \u00e0 cette cat\u00e9gorie.<\/p>\n\n\n\n<p>Au-del\u00e0 de cela, les banques et entreprises comme BBVA, Bankia, Sabadell, CaixaBank, IBM, Microsoft, Google, Ernst &amp; Young, S7 Airlines, <a href=\"https:\/\/alfacash.blog\/2020\/12\/01\/givingtuesday-here-again-lot-cryptocurrencies\/\" target=\"_blank\" rel=\"noreferrer noopener\">BitGive<\/a>, Money on Chain et OneSmart City testent des contrats intelligents pour am\u00e9liorer leurs services ou les utilisent d\u00e9j\u00e0 dans diff\u00e9rentes applications. Donc, comme vous pouvez le voir, nous sommes d\u00e9j\u00e0 pleins de ces contrats.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"has-text-align-center\"><em>Vous voulez \u00e9changer des BTC, des ETH et d&#039;autres jetons\u00a0? Tu peux le faire<\/em>\u00a0<em>sans encombre\u00a0<a href=\"https:\/\/www.alfa.cash\/buy\/bitcoin\" target=\"_blank\" rel=\"noreferrer noopener\">sur Alfacash<\/a>! Et n&#039;oubliez pas que nous parlons de cela et de beaucoup d&#039;autres choses sur nos m\u00e9dias sociaux.<br><br><\/em><a href=\"https:\/\/twitter.com\/alfacash_crypto\" target=\"_blank\" rel=\"noreferrer noopener\">Twitter<\/a>\u00a0*\u00a0<a href=\"https:\/\/t.me\/AlfacashCommunity\" target=\"_blank\" rel=\"noreferrer noopener\">T\u00e9l\u00e9gramme<\/a>\u00a0*\u00a0<a href=\"https:\/\/www.instagram.com\/alfacashstore\" target=\"_blank\" rel=\"noreferrer noopener\">Instagram<\/a> * <a href=\"https:\/\/www.youtube.com\/channel\/UCOl4fdRHj8AseQ5b6z9udaw\" target=\"_blank\" rel=\"noreferrer noopener\">Youtube<\/a>\u00a0*<a href=\"https:\/\/www.facebook.com\/alfacashstore\" target=\"_blank\" rel=\"noreferrer noopener\">Facebook<\/a>\u00a0\u00a0*\u00a0<a href=\"https:\/\/vk.com\/alfacashcrypto\" target=\"_blank\" rel=\"noreferrer noopener\">Vkontakte<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Les contrats intelligents semblent \u00eatre un terme d\u00e9licat, surtout lorsqu&#039;ils essaient de l&#039;expliquer. V\u00e9rifions une description et des utilisations faciles.<\/p>","protected":false},"author":5,"featured_media":4848,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[48],"tags":[86,61,44,84,107,199],"class_list":{"0":"post-4844","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-learn","8":"tag-blockchain","9":"tag-cryptocurrencies","10":"tag-decentralization","11":"tag-defi","12":"tag-ethereum","13":"tag-smart-contracts"},"featured_image_src":"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contracts-Guide-Alfacash.png","author_info":{"display_name":"Isabel P\u00e9rez","author_link":"https:\/\/alfacash.blog\/fr\/author\/isabel\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.4 (Yoast SEO v25.4) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What on earth are smart contracts? 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