{"id":12815,"date":"2025-06-24T09:56:00","date_gmt":"2025-06-24T07:56:00","guid":{"rendered":"https:\/\/www.blog.bim.finance\/?p=12815"},"modified":"2025-07-10T17:19:28","modified_gmt":"2025-07-10T15:19:28","slug":"restaking-securite-defi-risques-opportunites","status":"publish","type":"post","link":"https:\/\/www.blog.bim.finance\/en\/restaking-securite-defi-risques-opportunites\/","title":{"rendered":"Restaking : quand la s\u00e9curit\u00e9 devient un march\u00e9 dans la DeFi"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"12815\" class=\"elementor elementor-12815\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-99b419f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"99b419f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-db04136\" data-id=\"db04136\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-11681f2 elementor-widget elementor-widget-heading\" data-id=\"11681f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"> Le restaking, ou comment faire travailler plusieurs fois un m\u00eame token<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-387dc26 elementor-widget elementor-widget-text-editor\" data-id=\"387dc26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"0 0 []\">Dans une blockchain classique, un token \u00ab\u00a0stak\u00e9\u00a0\u00bb (c\u2019est-\u00e0-dire bloqu\u00e9 pour participer \u00e0 la validation du r\u00e9seau) sert \u00e0 une seule mission : contribuer \u00e0 la s\u00e9curit\u00e9 de cette blockchain. Tant qu\u2019il est stak\u00e9, ce capital reste immobilis\u00e9.<\/p><p data-pm-slice=\"0 0 []\">Mais le restaking propose une approche nouvelle : et si ce token, d\u00e9j\u00e0 utilis\u00e9 pour s\u00e9curiser un r\u00e9seau comme Ethereum, pouvait <strong>\u00eatre r\u00e9utilis\u00e9 pour s\u00e9curiser d&rsquo;autres services ?<\/strong> Des applications d\u00e9centralis\u00e9es, des oracles, ou m\u00eame d&rsquo;autres blockchains.<\/p><p>L\u2019id\u00e9e est simple \u00e0 comprendre, mais puissante : au lieu de mobiliser de nouveaux fonds \u00e0 chaque fois qu\u2019un protocole a besoin de s\u00e9curit\u00e9, on fait <strong>circuler la s\u00e9curit\u00e9 d\u00e9j\u00e0 en place<\/strong>, comme une <strong>ressource partag\u00e9e<\/strong>.<\/p><p>Ce m\u00e9canisme permet de cr\u00e9er un <strong>v\u00e9ritable march\u00e9 de la s\u00e9curit\u00e9<\/strong> : un d\u00e9tenteur de tokens stak\u00e9s peut les \u00ab\u00a0mettre \u00e0 disposition\u00a0\u00bb d&rsquo;autres protocoles, qui les r\u00e9mun\u00e8rent en \u00e9change. La s\u00e9curit\u00e9 devient alors <strong>un actif mon\u00e9tisable<\/strong>, que l\u2019on peut pr\u00eater, r\u00e9partir et optimiser.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-364a8cd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"364a8cd\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-66eec88\" data-id=\"66eec88\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-31db3d1 elementor-widget elementor-widget-heading\" data-id=\"31db3d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pourquoi le restaking s\u00e9duit autant<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c74b625 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c74b625\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-24dcc7a\" data-id=\"24dcc7a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ac1ef9f elementor-widget elementor-widget-image\" data-id=\"ac1ef9f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"404\" src=\"https:\/\/i0.wp.com\/www.blog.bim.finance\/wp-content\/uploads\/2025\/06\/1_3ZjDLaXZq3UiMW7f8bHD3Q%402x.jpg?fit=800%2C404&amp;ssl=1\" class=\"attachment-large size-large wp-image-12819\" alt=\"Restaking\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-53ae381 elementor-widget elementor-widget-text-editor\" data-id=\"53ae381\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"0 0 []\">Ce nouveau mod\u00e8le attire de plus en plus l\u2019attention, car il permet de <strong>faire plus avec moins<\/strong>.<\/p><p data-pm-slice=\"0 0 []\">En r\u00e9utilisant des tokens d\u00e9j\u00e0 stak\u00e9s, les utilisateurs peuvent <strong>g\u00e9n\u00e9rer plusieurs flux de revenus<\/strong> avec un seul capital. Cela augmente m\u00e9caniquement la rentabilit\u00e9. Le m\u00eame ETH, par exemple, pourrait s\u00e9curiser Ethereum, mais aussi d\u2019autres applications, et rapporter sur plusieurs fronts.<\/p><p>C\u00f4t\u00e9 projets, c\u2019est aussi un avantage : <strong>plus besoin de cr\u00e9er son propre syst\u00e8me de validateurs<\/strong> pour assurer la s\u00e9curit\u00e9. Ils peuvent \u00ab\u00a0louer\u00a0\u00bb celle existante via des restakers, et ainsi d\u00e9marrer plus vite, avec moins de barri\u00e8res techniques.<\/p><p>En r\u00e9sum\u00e9, le restaking permet :<\/p><ul><li>Aux utilisateurs <strong>d&rsquo;optimiser leurs rendements;<\/strong><\/li><li>Aux nouveaux projets <strong>d&rsquo;acc\u00e9der rapidement \u00e0 de la s\u00e9curit\u00e9;<\/strong><\/li><li>\u00c0 l&rsquo;ensemble de l&rsquo;\u00e9cosyst\u00e8me de <strong>gagner en efficacit\u00e9<\/strong> et en capital disponible.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cb50bbc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cb50bbc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-55b5fb9\" data-id=\"55b5fb9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8087c8d elementor-widget elementor-widget-heading\" data-id=\"8087c8d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Un mod\u00e8le s\u00e9duisant\u2026 mais potentiellement fragile<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-36f6b21 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"36f6b21\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9377684\" data-id=\"9377684\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2333e27 elementor-widget elementor-widget-text-editor\" data-id=\"2333e27\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"0 0 []\">Mais toute innovation puissante comporte ses risques. Et ici, le principal danger est souvent sous-estim\u00e9 : <strong>la concentration du risque<\/strong>.<\/p><p data-pm-slice=\"0 0 []\">Vous avez stak\u00e9 vos tokens sur un r\u00e9seau principal (comme Ethereum). Gr\u00e2ce au restaking, ces m\u00eames tokens sont aussi utilis\u00e9s pour s\u00e9curiser d\u2019autres services. Le probl\u00e8me ? Si un seul de ces services rencontre un probl\u00e8me s\u00e9rieux (un bug, un hack, une crise de gouvernance), <strong>cela peut impacter l\u2019ensemble de votre capital<\/strong>.<\/p><p data-pm-slice=\"0 0 []\">On appelle cela <strong>un effet domino<\/strong> : un protocole tombe, les tokens sont p\u00e9nalis\u00e9s (slashing), et vous perdez, m\u00eame si les autres projets fonctionnaient bien.<\/p><p data-pm-slice=\"0 0 []\">Et si ces restaking layers deviennent trop gros ou trop pr\u00e9sents, ils pourraient <strong>mettre en p\u00e9ril la stabilit\u00e9 du r\u00e9seau principal lui-m\u00eame<\/strong>. C\u2019est un peu comme si tout le syst\u00e8me reposait sur la solidit\u00e9 d\u2019une seule poutre : tr\u00e8s rentable quand \u00e7a tient, tr\u00e8s dangereux si \u00e7a casse.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9ba0ba6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9ba0ba6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-eeb5c6a\" data-id=\"eeb5c6a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3ce7c7f elementor-widget elementor-widget-heading\" data-id=\"3ce7c7f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">D\u2019autres risques \u00e0 prendre au s\u00e9rieux<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-83311d2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"83311d2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a3ac503\" data-id=\"a3ac503\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-27a9534 elementor-widget elementor-widget-text-editor\" data-id=\"27a9534\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"0 0 []\">En plus de cet effet domino, plusieurs autres fragilit\u00e9s apparaissent :<\/p><ul><li data-pm-slice=\"0 0 []\"><p data-pm-slice=\"0 0 []\"><strong>Complexit\u00e9 croissante<\/strong> : il devient difficile pour un utilisateur de savoir o\u00f9, comment et pourquoi ses tokens sont utilis\u00e9s.<\/p><\/li><li data-pm-slice=\"0 0 []\"><p data-pm-slice=\"0 0 []\"><strong>Manque de transparence<\/strong> : certaines plateformes ne d\u00e9taillent pas clairement les risques li\u00e9s \u00e0 chaque usage secondaire.<\/p><\/li><li data-pm-slice=\"0 0 []\"><p data-pm-slice=\"0 0 []\"><strong>Responsabilit\u00e9 floue<\/strong> : en cas de probl\u00e8me, qui est responsable ? L\u2019utilisateur ? Le protocole tiers ? Le r\u00e9seau d\u2019origine ? La plateforme de restaking ? La r\u00e9ponse est rarement \u00e9vidente.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ee16abd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ee16abd\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5a44ef2\" data-id=\"5a44ef2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fa6750d elementor-widget elementor-widget-heading\" data-id=\"fa6750d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion \u2013 Un pari sur l\u2019efficacit\u00e9\u2026 mais \u00e0 quel prix ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3911434 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3911434\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4fed6d1\" data-id=\"4fed6d1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d3c04fb elementor-widget elementor-widget-text-editor\" data-id=\"d3c04fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"0 0 []\">Le restaking ouvre un nouveau chapitre de la DeFi : <strong>plus agile, plus rentable, plus modulaire<\/strong>. C\u2019est une avanc\u00e9e technique et \u00e9conomique importante.<\/p><p data-pm-slice=\"0 0 []\">Mais elle soul\u00e8ve une question centrale : <strong>peut-on empiler les usages sans empiler aussi les risques ?<\/strong><\/p><p data-pm-slice=\"0 0 []\">Plus que jamais, les utilisateurs doivent comprendre o\u00f9 circule leur capital, qui le manipule, et quels sc\u00e9narios extr\u00eames sont possibles. Car si tout le monde cherche \u00e0 optimiser les rendements, <strong>peu de gens sont pr\u00eats \u00e0 assumer les pertes lorsque tout est interconnect\u00e9<\/strong>.<\/p><p data-pm-slice=\"0 0 []\">C\u2019est l\u00e0 que r\u00e9side le vrai d\u00e9fi du restaking. Construire un syst\u00e8me plus efficace, sans sacrifier la r\u00e9silience. Et dans cette \u00e9quation, la responsabilit\u00e9 de chacun (<strong>utilisateur, protocole, plateforme<\/strong>) ne doit jamais \u00eatre effac\u00e9e derri\u00e8re des promesses de rendement.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ecbe6c2 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"ecbe6c2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/exchange.bim.finance\/en\/#tab-buyCrypto\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">D\u00e9couvrir BIM Exchange<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Le restaking bouscule les r\u00e8gles de la s\u00e9curit\u00e9 en crypto. R\u00e9utiliser un actif d\u00e9j\u00e0 stak\u00e9 pour s\u00e9curiser d&rsquo;autres protocoles\u202f: bonne id\u00e9e ou m\u00e9canique trop risqu\u00e9e ? On explore les promesses et les pi\u00e8ges d\u2019un mod\u00e8le qui pourrait redessiner la DeFi.<\/p>","protected":false},"author":18,"featured_media":12865,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[7],"tags":[],"ppma_author":[145],"class_list":["post-12815","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blockchain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Restaking : quand la s\u00e9curit\u00e9 devient un march\u00e9 dans la DeFi - BIM Blog<\/title>\n<meta name=\"description\" content=\"Le restaking transforme la s\u00e9curit\u00e9 blockchain en actif mon\u00e9tisable. Analyse d\u2019un mod\u00e8le prometteur\u2026 mais potentiellement risqu\u00e9.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.blog.bim.finance\/en\/restaking-securite-defi-risques-opportunites\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Restaking : quand la s\u00e9curit\u00e9 devient un march\u00e9 dans la DeFi - BIM Blog\" \/>\n<meta property=\"og:description\" content=\"Le restaking transforme la s\u00e9curit\u00e9 blockchain en actif mon\u00e9tisable. 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