{"id":6548,"date":"2018-07-25T06:55:10","date_gmt":"2018-07-25T06:55:10","guid":{"rendered":"https:\/\/insights.invyo.io\/france\/?p=6548"},"modified":"2018-07-25T07:46:20","modified_gmt":"2018-07-25T07:46:20","slug":"blockchain-trois-plateformes-majeures-pour-concevoir-vos-smart-contracts","status":"publish","type":"post","link":"https:\/\/insights.invyo.io\/france\/apprendre\/blockchain-trois-plateformes-majeures-pour-concevoir-vos-smart-contracts\/","title":{"rendered":"Blockchain : trois plateformes majeures pour concevoir vos \u00ab smart contracts \u00bb"},"content":{"rendered":"<p><strong>Il y a la blockchain Bitcoin bien entendu, et son c\u00e9l\u00e8bre rival Ethereum. Si ces deux plateformes sont les plus connues, d\u2019autres concurrents ont \u00e9merg\u00e9 ces derniers mois, proposant des alternatives s\u00e9rieuses pour la conception des \u00ab\u00a0smart contracts\u00a0\u00bb\u00a0: Waves, NEO, EOS our encore Stellar.<\/strong><\/p>\n<p>La technologie blockchain souffle cette ann\u00e9e ses <strong>10 premi\u00e8res bougies<\/strong>. De nombreux acteurs ont suivi le mouvement initi\u00e9 par Bitcoin et Ethereum offrant une multitude de solutions pour quiconque souhaite d\u00e9velopper un projet ou une id\u00e9e sur une base blockchain.<\/p>\n<blockquote><p>\u00ab\u00a0<em>A smart contract is a set of promises, specified in digital form, including protocols within which the parties perform on these promises<\/em>\u00a0\u00bb &#8211; Nick Szabo, 1996<\/p><\/blockquote>\n<p>Il est important de rappeler que le concept de \u00ab\u00a0smart contracts\u00a0\u00bb a \u00e9t\u00e9 <strong>introduit par la blockchain Ethereum<\/strong>. Le \u00ab\u00a0smart contract\u00a0\u00bb est un contrat <strong>\u00e9crit en langage informatique<\/strong>, contrairement au contrat plus traditionnel r\u00e9dig\u00e9 dans un langage juridique. Autre singularit\u00e9\u00a0: les termes d\u2019un \u00ab\u00a0smart contract\u00a0\u00bb sont respect\u00e9s sur l\u2019ensemble des <strong>n\u0153uds de la blockchain<\/strong>, le rendant ainsi\u00a0enti\u00e8rement autonome.<\/p>\n<h3>Aper\u00e7u des plateformes de \u00ab\u00a0smart contracts\u00a0\u00bb<\/h3>\n<p>Il existe actuellement<strong> plus d\u2019une vingtaine<\/strong> de plateformes de \u00ab\u00a0smart contract\u00a0\u00bb.<\/p>\n<figure id=\"attachment_6551\" aria-describedby=\"caption-attachment-6551\" style=\"width: 899px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/hackernoon.com\/comparison-of-smart-contract-platforms-2796e34673b7\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" class=\"wp-image-6551 size-full\" src=\"https:\/\/insights.invyo.io\/france\/wp-content\/uploads\/2018\/07\/SCplatform.png\" alt=\"\" width=\"899\" height=\"996\" srcset=\"https:\/\/insights.invyo.io\/france\/wp-content\/uploads\/2018\/07\/SCplatform.png 899w, https:\/\/insights.invyo.io\/france\/wp-content\/uploads\/2018\/07\/SCplatform-271x300.png 271w, https:\/\/insights.invyo.io\/france\/wp-content\/uploads\/2018\/07\/SCplatform-768x851.png 768w, https:\/\/insights.invyo.io\/france\/wp-content\/uploads\/2018\/07\/SCplatform-700x776.png 700w\" sizes=\"(max-width: 899px) 100vw, 899px\" \/><\/a><figcaption id=\"caption-attachment-6551\" class=\"wp-caption-text\">Source: Michiel Mulders<\/figcaption><\/figure>\n<p>Parmi elles, certaines se distinguent plus que d\u2019autres de par leurs aspects fonctionnels, techniques ou pratiques. Nous avons fait le choix \u2013 arbitraire\u00a0! \u2013 d\u2019en pr\u00e9senter <strong>trois d\u2019entre elles<\/strong>.<\/p>\n<h3>Ethereum :\u00a0Le choix de la stabilit\u00e9 !<\/h3>\n<p><a href=\"https:\/\/www.ethereum.org\/\" target=\"_blank\" rel=\"noopener\"><strong>Ethereum<\/strong><\/a> est naturellement la plus c\u00e9l\u00e8bre des plateformes, puisque c\u2019est elle qui a invent\u00e9 le principe de \u00ab\u00a0smart contracts\u00a0\u00bb. Le jeune prodige Vitalik Buterin en est \u00e0 l\u2019origine. Depuis son lancement \u00e0 l\u2019\u00e9t\u00e9 2015, elle a rencontr\u00e9 un succ\u00e8s incontestable gr\u00e2ce notamment aux Ether, l\u2019unit\u00e9 de compte associ\u00e9e \u00e0 la Blockchain.<\/p>\n<p>La vaste majorit\u00e9 des ICOs (Initial Coin Offering) utilisent d\u2019ailleurs les <strong>tokens Ethereum<\/strong>. C\u2019est aussi un autre avantage\u00a0: il existe plusieurs variantes des tokens dont le c\u00e9l\u00e8bre ERC20 mais aussi de nombreuses autres possibilit\u00e9s int\u00e9ressantes. Nous pensons par exemple \u00e0 l\u2019ERC721 dit \u00ab\u00a0Non-Fungible Token\u00a0\u00bb (token non fongible), illustr\u00e9s avec les fameux CryptoKitties.<\/p>\n<h3>Stellar :\u00a0Miser sur la rapidit\u00e9<\/h3>\n<p><a href=\"https:\/\/www.stellar.org\/\" target=\"_blank\" rel=\"noopener\"><strong>Stellar<\/strong><\/a> est une plateforme int\u00e9ressante pour les projets qui ont besoin d\u2019une <strong>haute rapidit\u00e9 de transactions<\/strong>. Par extension, elle est int\u00e9ressante pour ceux qui ont des <strong>petits volumes d\u2019\u00e9changes<\/strong>.<\/p>\n<p>Concr\u00e8tement, le temps moyen de confirmation d\u2019une transaction est de <strong>5 secondes<\/strong>, contre plusieurs minutes sur d\u2019autres plateformes. De plus, le prix est infiniment plus bas et correspond \u00e0 <strong>0,00001 XLM<\/strong> (la \u00ab\u00a0monnaie\u00a0\u00bb de Stellar).<\/p>\n<p>Enfin, outre le fait que les \u00ab\u00a0smart contracts\u00a0\u00bb peuvent \u00eatre cod\u00e9s en langages connus (JavaScript, PHP, Python, etc.), la plateforme Stellar pr\u00e9sente d\u2019autres avantages (qu\u2019elle partage avec d\u2019autres plateformes) :<\/p>\n<ul>\n<li>Multi signature\u00a0: plusieurs signatures obligatoires pour d\u00e9verrouiller un \u00ab\u00a0smart contract\u00a0\u00bb;<\/li>\n<li>Batching\u00a0: plusieurs op\u00e9rations dans une transaction;<\/li>\n<li>Sequence\u00a0: chaque transaction dispose d\u2019un nombre s\u00e9quenc\u00e9;<\/li>\n<li>Time bounds\u00a0: limitation d\u2019une transaction dans le temps<\/li>\n<\/ul>\n<h3>Hyperledger Fabric<\/h3>\n<p>Projet \u00e0 l\u2019origine port\u00e9 par la Linux Foundation, IBM l\u2019a repris \u00e0 son compte en 2016 sous le nom <a href=\"https:\/\/www.hyperledger.org\/projects\/fabric\" target=\"_blank\" rel=\"noopener\"><strong>Hyperledger Fabric<\/strong><\/a> (HLF). Cette plateforme est clairement orient\u00e9e pour r\u00e9pondre aux <strong>besoins des entreprises<\/strong>. D\u00e9velopp\u00e9e en langage Go, elle supporte ce langage qui assure un temps de compilation tr\u00e8s rapide.<\/p>\n<p>Sur HLF, on ne con\u00e7oit pas des \u00ab\u00a0smart contracts\u00a0\u00bb mais des \u00ab\u00a0chaincodes\u00a0\u00bb dont les trois fonctions cl\u00e9s permettent de <strong>cr\u00e9er et retrouver des asset<\/strong>, mais aussi <strong>retrouver l\u2019historique des changements<\/strong>. Enfin, une derni\u00e8re fonction supprimer (DelState) qui permet de <strong>supprimer une cl\u00e9<\/strong> et sa valeur associ\u00e9e, sans pour autant alt\u00e9rer les blocs de la blockchain.<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Il y a la blockchain Bitcoin bien entendu, et son c\u00e9l\u00e8bre rival Ethereum. Si ces deux plateformes sont les plus connues, d\u2019autres concurrents ont \u00e9merg\u00e9 ces derniers mois, proposant des alternatives s\u00e9rieuses pour la conception des \u00ab\u00a0smart contracts\u00a0\u00bb\u00a0: Waves, NEO, EOS our encore Stellar. La technologie blockchain souffle cette ann\u00e9e ses 10 premi\u00e8res bougies. De [&hellip;]<\/p>\n","protected":false},"author":43,"featured_media":6552,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1173,1210],"tags":[1242,1243,2721,2679,2722,2526,2712,2719,2710,2711,2703,2704,2706,2708,2300,2689,2663,2715,2707,1865,2718,2716,2664,2702,2705,2713,2714,2709,2717,2720],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/insights.invyo.io\/france\/apprendre\/blockchain-trois-plateformes-majeures-pour-concevoir-vos-smart-contracts\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Blockchain : trois plateformes majeures pour concevoir vos \u00ab smart contracts \u00bb - INVYO Insights France : Media Fintech\" \/>\n<meta property=\"og:description\" content=\"Il y a la blockchain Bitcoin bien entendu, et son c\u00e9l\u00e8bre rival Ethereum. Si ces deux plateformes sont les plus connues, d\u2019autres concurrents ont \u00e9merg\u00e9 ces derniers mois, proposant des alternatives s\u00e9rieuses pour la conception des \u00ab\u00a0smart contracts\u00a0\u00bb\u00a0: Waves, NEO, EOS our encore Stellar. La technologie blockchain souffle cette ann\u00e9e ses 10 premi\u00e8res bougies. 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Si ces deux plateformes sont les plus connues, d\u2019autres concurrents ont \u00e9merg\u00e9 ces derniers mois, proposant des alternatives s\u00e9rieuses pour la conception des \u00ab\u00a0smart contracts\u00a0\u00bb\u00a0: Waves, NEO, EOS our encore Stellar. La technologie blockchain souffle cette ann\u00e9e ses 10 premi\u00e8res bougies. 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