{"id":11170,"date":"2025-01-13T09:00:00","date_gmt":"2025-01-13T08:00:00","guid":{"rendered":"https:\/\/www.blog.bim.finance\/?p=11170"},"modified":"2025-01-10T16:28:15","modified_gmt":"2025-01-10T15:28:15","slug":"quest-ce-que-le-maximal-extractable-value-mev","status":"publish","type":"post","link":"https:\/\/www.blog.bim.finance\/en\/quest-ce-que-le-maximal-extractable-value-mev\/","title":{"rendered":"Qu\u2019est-ce que le Maximal Extractable Value (MEV) ?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"11170\" class=\"elementor elementor-11170\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4dd4b63 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4dd4b63\" 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-5d9bd31\" data-id=\"5d9bd31\" 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-393feb9 elementor-widget elementor-widget-text-editor\" data-id=\"393feb9\" 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=\"1 1 []\">Le Maximal Extractable Value fait r\u00e9f\u00e9rence \u00e0 la valeur maximale qu\u2019un acteur (comme un mineur, validateur ou bot) peut extraire en manipulant l&rsquo;ordre, l&rsquo;inclusion ou l&rsquo;exclusion des transactions dans un bloc d&rsquo;une blockchain.<\/p>\n<p data-pm-slice=\"1 1 []\">Ce ph\u00e9nom\u00e8ne, souvent surnomm\u00e9 <strong>\u00ab taxe invisible \u00bb, est omnipr\u00e9sent sur Ethereum<\/strong> mais touche \u00e9galement d\u2019autres blockchains. Explorons les m\u00e9canismes, les strat\u00e9gies et les implications du MEV.<\/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-2aeacc2 elementor-widget elementor-widget-heading\" data-id=\"2aeacc2\" 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<h3 class=\"elementor-heading-title elementor-size-default\">Comment fonctionne le MEV ?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e8cdb1 elementor-widget elementor-widget-text-editor\" data-id=\"3e8cdb1\" 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=\"1 1 []\">Pour comprendre le MEV, il est essentiel de se plonger dans la mani\u00e8re dont les transactions sont trait\u00e9es dans une blockchain. Lorsqu\u2019une transaction est soumise, elle est plac\u00e9e dans un espace d\u2019attente appel\u00e9 <strong>mempool<\/strong> jusqu\u2019\u00e0 ce qu\u2019un validateur ou mineur l\u2019ajoute \u00e0 un bloc. Les mineurs\/validateurs d\u00e9cident de l\u2019ordre des transactions dans ce bloc, offrant des opportunit\u00e9s pour maximiser leurs profits.<\/p>\n<p>Cette prioritisation des transactions repose souvent sur les frais de gas pay\u00e9s par les utilisateurs. Cependant, la transparence du mempool ouvre la voie \u00e0 des strat\u00e9gies plus complexes, comme le <strong>front-running<\/strong>, les <strong>attaques sandwich<\/strong> ou l\u2019<strong>arbitrage<\/strong>.<\/p>\n<h4><strong>Acteurs cl\u00e9s du MEV :<\/strong><\/h4>\n<ol start=\"1\" data-spread=\"false\">\n<li>\n<p><strong>Mineurs\/validateurs :<\/strong> Ils construisent les blocs et peuvent exploiter le MEV directement en r\u00e9organisant les transactions.<\/p>\n<\/li>\n<li>\n<p><strong>Searchers :<\/strong> Ces participants tiers utilisent des algorithmes avanc\u00e9s pour d\u00e9tecter et exploiter les opportunit\u00e9s MEV.<\/p>\n<\/li>\n<li>\n<p><strong>Block builders :<\/strong> Dans des mod\u00e8les avanc\u00e9s comme le PBS (Proposer-Builder Separation), des entit\u00e9s d\u00e9di\u00e9es construisent des blocs optimis\u00e9s pour le MEV.<\/p>\n<\/li>\n<\/ol>\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-4ffe78d elementor-widget elementor-widget-heading\" data-id=\"4ffe78d\" 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<h3 class=\"elementor-heading-title elementor-size-default\">Exemples concrets du Maximal Extractable Value<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d8300b0 elementor-widget elementor-widget-text-editor\" data-id=\"d8300b0\" 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<h4 data-pm-slice=\"1 1 []\"><strong>1. Arbitrage sur les DEX<\/strong><\/h4>\n<p>L\u2019arbitrage est une pratique o\u00f9 un acteur profite des diff\u00e9rences de prix d\u2019un m\u00eame actif entre deux plateformes.<\/p>\n<p><strong>Sc\u00e9nario :<\/strong><\/p>\n<ul data-spread=\"false\">\n<li>\n<p>Sur <a href=\"https:\/\/www.blog.bim.finance\/en\/uniswap-uni-lechangeur-decentralisee-sur-ethereum\/\">Uniswap<\/a>, 1 SOL vaut 143 BUSD, tandis que sur une autre pool de PancakeSwap, 1 SOL vaut 146 BUSD.<\/p>\n<\/li>\n<li>\n<p>Un searcher ach\u00e8te 50 SOL \u00e0 143 BUSD (total : 7 150 BUSD) et les revend imm\u00e9diatement \u00e0 146 BUSD (total : 7 300 BUSD).<\/p>\n<\/li>\n<li>\n<p>Profit : 150 BUSD, moins les frais de transaction.<\/p>\n<\/li>\n<\/ul>\n<p>Bien que cette pratique am\u00e9liore l\u2019efficacit\u00e9 des march\u00e9s en alignant les prix, elle introduit une forte comp\u00e9tition pour exploiter ces opportunit\u00e9s.<\/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-4d0072e elementor-widget elementor-widget-text-editor\" data-id=\"4d0072e\" 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<h4 data-pm-slice=\"1 3 []\"><strong>2. Attaque sandwich<\/strong><\/h4>\n<p>Dans une attaque sandwich, un bot entoure la transaction d\u2019une victime par une transaction d\u2019achat et une de vente.<\/p>\n<p><strong>Exemple :<\/strong><\/p>\n<ul data-spread=\"false\">\n<li>\n<p>Une victime place un ordre pour acheter 1 000 <a href=\"https:\/\/www.blog.bim.finance\/en\/quest-ce-que-le-chainlink-link-le-systeme-doracles-decentralise\/\">LINK<\/a>. Le bot d\u00e9tecte cette transaction et place une commande pour acheter des LINK avant la transaction de la victime, provoquant une augmentation du prix.<\/p>\n<\/li>\n<li>\n<p>Apr\u00e8s que la transaction de la victime est ex\u00e9cut\u00e9e \u00e0 un prix plus \u00e9lev\u00e9, le bot revend les LINK acquis, r\u00e9alisant un profit.<\/p>\n<\/li>\n<\/ul>\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-a2012db elementor-widget elementor-widget-text-editor\" data-id=\"a2012db\" 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<h4 data-pm-slice=\"1 3 []\"><strong>3. Liquidations<\/strong><\/h4>\n<p>Dans la finance d\u00e9centralis\u00e9e (DeFi), un pr\u00eat devient \u00e9ligible \u00e0 liquidation lorsque la valeur de son collat\u00e9ral tombe en dessous du seuil requis.<\/p>\n<p><strong>Cas pratique :<\/strong><\/p>\n<ul data-spread=\"false\">\n<li>\n<p>Un emprunteur d\u00e9pose 10 ETH comme collat\u00e9ral pour un emprunt de 15 000 USDC.<\/p>\n<\/li>\n<li>\n<p>Si le prix de l\u2019ETH chute, le collat\u00e9ral devient insuffisant. Un liquidateur peut acheter l\u2019ETH \u00e0 prix r\u00e9duit, le revendre et empocher la diff\u00e9rence.<\/p>\n<\/li>\n<\/ul>\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-efd5ada elementor-widget elementor-widget-heading\" data-id=\"efd5ada\" 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<h3 class=\"elementor-heading-title elementor-size-default\">Impact du MEV : bienfaits et inconv\u00e9nients<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7602103 elementor-widget elementor-widget-text-editor\" data-id=\"7602103\" 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<h4 data-pm-slice=\"1 1 []\"><strong>Avantages :<\/strong><\/h4>\n<ol start=\"1\" data-spread=\"false\">\n<li>\n<p><strong>Incitation \u00e0 la s\u00e9curit\u00e9 :<\/strong> Les profits li\u00e9s au MEV attirent plus de validateurs, renfor\u00e7ant la s\u00e9curit\u00e9 du r\u00e9seau. Cela garantit une participation continue des validateurs, r\u00e9duisant les risques d\u2019attaques par des acteurs malveillants. En g\u00e9n\u00e9ral, l\u2019existence d\u2019un MEV exploitable peut am\u00e9liorer la robustesse de la blockchain, car elle cr\u00e9e des incitations financi\u00e8res \u00e0 maintenir l\u2019int\u00e9grit\u00e9 du r\u00e9seau.<\/p>\n<\/li>\n<li>\n<p><strong>Am\u00e9lioration de l\u2019efficacit\u00e9 du march\u00e9 :<\/strong> L\u2019arbitrage permet une harmonisation rapide des prix entre plateformes, contribuant \u00e0 stabiliser les march\u00e9s d\u00e9centralis\u00e9s. Ces op\u00e9rations d\u2019arbitrage corrigent les d\u00e9s\u00e9quilibres de liquidit\u00e9 et augmentent la comp\u00e9titivit\u00e9 du march\u00e9, b\u00e9n\u00e9ficiant \u00e0 l\u2019\u00e9cosyst\u00e8me dans son ensemble.<\/p>\n<\/li>\n<\/ol>\n<h4><strong>Inconv\u00e9nients :<\/strong><\/h4>\n<ol start=\"1\" data-spread=\"false\">\n<li>\n<p><strong>Centralisation :<\/strong> Les acteurs disposant de ressources avanc\u00e9es dominent, ce qui peut entra\u00eener une concentration du pouvoir. Cette centralisation va \u00e0 l\u2019encontre des principes fondamentaux de la d\u00e9centralisation, compromettant la r\u00e9silience des r\u00e9seaux face aux attaques ou \u00e0 la manipulation.<\/p>\n<\/li>\n<li>\n<p><strong>Inefficacit\u00e9 pour les utilisateurs :<\/strong> Les attaques sandwich ou le front-running augmentent les co\u00fbts des transactions pour les utilisateurs ordinaires. Ces m\u00e9canismes exploitent la transparence des mempools, rendant les transactions co\u00fbteuses et moins pr\u00e9visibles pour ceux qui ne disposent pas d\u2019outils d\u00e9di\u00e9s.<\/p>\n<\/li>\n<li>\n<p><strong>Risque de censure :<\/strong> Les validateurs peuvent privil\u00e9gier certaines transactions ou en ignorer d\u2019autres, nuisant \u00e0 l\u2019\u00e9quit\u00e9 du r\u00e9seau. Cela peut provoquer une perte de confiance dans la neutralit\u00e9 des blockchains, freinant leur adoption par le grand public et les institutions.<\/p>\n<\/li>\n<\/ol>\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-4ae4831 elementor-widget elementor-widget-heading\" data-id=\"4ae4831\" 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<h4 class=\"elementor-heading-title elementor-size-default\">Solutions pour r\u00e9duire l\u2019impact du MEV<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dbdcff8 elementor-widget elementor-widget-text-editor\" data-id=\"dbdcff8\" 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<h4 data-pm-slice=\"1 1 []\"><strong>MEV Blockers<\/strong><\/h4>\n<p>Les <strong>RPC Endpoints MEV Blockers<\/strong> permettent de soumettre des transactions via des r\u00e9seaux priv\u00e9s de searchers, \u00e9vitant ainsi le mempool public o\u00f9 les opportunit\u00e9s MEV sont exploit\u00e9es. Ces outils offrent une protection suppl\u00e9mentaire contre les attaques sandwich et garantissent une ex\u00e9cution plus \u00e9quitable des transactions.<\/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-f01565a elementor-widget elementor-widget-text-editor\" data-id=\"f01565a\" 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<h4 data-pm-slice=\"1 1 []\"><strong>Proposer-Builder Separation (PBS)<\/strong><\/h4>\n<p>Cette approche s\u00e9pare la construction et la proposition des blocs, r\u00e9duisant les risques de censure et de manipulation. Le PBS encourage une comp\u00e9tition saine entre les constructeurs de blocs, tout en limitant leur contr\u00f4le direct sur le contenu des blocs finalis\u00e9s.<\/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-4b90414 elementor-widget elementor-widget-text-editor\" data-id=\"4b90414\" 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<h4 data-pm-slice=\"1 1 []\"><strong>DEX avec protection native<\/strong><\/h4>\n<p>Des plateformes comme CoW Protocol utilisent des ench\u00e8res par lot pour minimiser les exploits MEV. En regroupant les transactions dans un cadre d\u2019ex\u00e9cution unique, ces protocoles prot\u00e8gent les utilisateurs contre les manipulations tout en r\u00e9duisant les frais de transaction.<\/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-db0e11b elementor-widget elementor-widget-text-editor\" data-id=\"db0e11b\" 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<h4 data-pm-slice=\"1 1 []\"><strong>Ajustement de la tol\u00e9rance au slippage<\/strong><\/h4>\n<p>R\u00e9gler une tol\u00e9rance faible au glissement emp\u00eache les attaques sandwich, car les transactions ne sont pas ex\u00e9cut\u00e9es si le prix d\u00e9vie trop. Cette strat\u00e9gie est particuli\u00e8rement efficace pour les petits investisseurs, leur permettant de mieux prot\u00e9ger leurs fonds contre les exploits.<\/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-fdff16c elementor-widget elementor-widget-heading\" data-id=\"fdff16c\" 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<h5 class=\"elementor-heading-title elementor-size-default\">Conclusion : le MEV, un \u00e9quilibre d\u00e9licat<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-80815db elementor-widget elementor-widget-text-editor\" data-id=\"80815db\" 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=\"1 1 []\">Le Maximal Extractable Value est un m\u00e9canisme inh\u00e9rent \u00e0 la blockchain, apportant \u00e0 la fois des opportunit\u00e9s de profit et des d\u00e9fis \u00e9thiques et techniques. Bien que certaines de ses applications soient b\u00e9n\u00e9fiques, ses effets n\u00e9gatifs sur l\u2019\u00e9quit\u00e9 et la d\u00e9centralisation exigent une surveillance et des am\u00e9liorations continues.<\/p>\n<p>Dans un monde o\u00f9 la blockchain promet de d\u00e9mocratiser la finance, comprendre et ma\u00eetriser le MEV est essentiel pour maintenir la confiance et l\u2019accessibilit\u00e9 de ces syst\u00e8mes.<\/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<\/div>","protected":false},"excerpt":{"rendered":"<p>La blockchain, en tant que technologie d\u00e9centralis\u00e9e et transparente, offre une myriade d\u2019opportunit\u00e9s mais introduit \u00e9galement des d\u00e9fis complexes. Parmi eux, le concept de Maximal Extractable Value (MEV) \u2014 litt\u00e9ralement la valeur extractible maximale \u2014 est un sujet crucial, \u00e0 la fois fascinant et controvers\u00e9.<\/p>","protected":false},"author":4,"featured_media":11179,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[7,16],"tags":[],"ppma_author":[147],"class_list":["post-11170","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blockchain","category-lexique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu\u2019est-ce que le Maximal Extractable Value (MEV) ?<\/title>\n<meta name=\"description\" content=\"Qu&#039;est ce que le MEV ou Maximal Extractable Value, un des sujets cruciaux et fascinants de la technologie 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