[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"mining-farm-info":3,"blog-tag-archive-uniswap-fr-1-9":7},{"data":4},{"fpps":5,"btc_rate":6},4.4e-7,76840.83,{"posts":8,"total_posts":41,"total_pages":41,"current_page":41,"tag":42,"all_tags":46},[9],{"id":10,"slug":11,"title":12,"content":13,"excerpt":14,"link":15,"date":16,"author":17,"featured_image":18,"lang":19,"tags":20},51330,"uniswap-explique-ce-que-cest-comment-ca-marche-et-comment-utiliser-ce-dex","Uniswap expliqué : ce que c’est, comment ça marche et comment utiliser ce DEX","IntroductionQu&#8217;est-ce que Uniswap ?Comment fonctionne la bourse Uniswap ?Utiliser Uniswap au quotidienÉvolution, risques et conclusion\nIntroduction\nLa décentralisation a transformé notre rapport à la finance. Aujourd&#8217;hui, les utilisateurs choisissent entre systèmes centralisés et alternatives décentralisées. Les plateformes permettant de garder le contrôle total de ses actifs sont particulièrement attractifs. Au sein de cet écosystème DeFi, la bourse Uniswap occupe une place de choix.\nUniswap est le symbole d&#8217;un modèle de trading sans intermédiaires. Les transactions s&#8217;y font directement entre utilisateurs via des contrats intelligents. Pour beaucoup, ce protocole a été une introduction aux concepts de DEX et d&#8217;AMM. Aujourd&#8217;hui, la bourse Uniswap figure parmi les plus grandes plateformes mondiales. Son succès repose sur sa simplicité. Contrairement aux bourses classiques, aucun compte ni KYC n&#8217;est requis. Il suffit de connecter un portefeuille pour accéder aux services sur navigateur ou mobile.\nDans cet article, nous détaillerons le fonctionnement du protocole et les raisons de son immense popularité.\nQu&#8217;est-ce que Uniswap ?\nLa bourse Uniswap est un échange décentralisé (DEX) pour les tokens ERC-20. Contrairement aux plateformes centralisées, elle ne stocke pas vos fonds. Les opérations sont gérées par des contrats intelligents, laissant le contrôle total à l&#8217;utilisateur.\nLancé en 2018, ce projet est un pilier de la DeFi. Uniswap propose un modèle unique où les utilisateurs fournissent la liquidité en échange de frais. C&#8217;est l&#8217;exemple parfait d&#8217;un marché automatisé sans intermédiaire.\nIl faut noter que la bourse Uniswap n&#8217;utilise pas de carnet d&#8217;ordres ni d&#8217;ordres &#8220;limite&#8221;. Les prix sont fixés par des algorithmes et des pools de liquidité. Ce système est accessible même aux débutants sans expérience en trading.\nLe jeton UNI joue aussi un rôle crucial dans la gouvernance du protocole. Ses détenteurs votent sur les mises à jour et les frais. Enfin, l&#8217;absence d&#8217;inscription simplifie tout : connectez votre portefeuille Web3 pour échanger instantanément.\n\nComment fonctionne la bourse Uniswap ?\nPour comprendre le fonctionnement d&#8217;Uniswap, il faut oublier le modèle boursier classique. Il n&#8217;y a pas d&#8217;acheteurs et de vendeurs qui attendent que leurs ordres correspondent. À la place, la plateforme utilise des algorithmes mathématiques qui déterminent les prix et permettent des échanges instantanés.Le protocole repose sur le concept de teneurs de marché automatisés (AMM). Les utilisateurs n&#8217;échangent pas entre eux, mais avec une réserve de liquidité alimentée par les participants. C&#8217;est ce qui rend ce DEX totalement autonome.\nLes teneurs de marché automatisés (AMM)\nL&#8217;AMM est un algorithme qui remplace le carnet d&#8217;ordres. Le prix d&#8217;un actif est déterminé par une formule (souvent $x \\times y = k$) plutôt que par l&#8217;offre et la demande en temps réel. Lorsque vous effectuez un échange, vous modifiez le ratio de jetons dans la réserve, et le prix est recalculé automatiquement. Cela permet à la bourse Uniswap de proposer de la liquidité même sur des jetons rares, là où les bourses classiques échoueraient faute d&#8217;acheteurs ou de vendeurs.\nPools de liquidité et jetons LP\nLes pools de liquidité sont des réserves numériques contenant deux cryptomonnaies ou plus (par exemple, ETH et USDT). En déposant des fonds dans ces pools, les utilisateurs deviennent des &#8220;fournisseurs de liquidité&#8221; et gagnent une commission sur chaque transaction. En échange de leur dépôt, ils reçoivent des jetons LP (Liquidity Provider tokens). Ces jetons prouvent leur part dans la réserve et leur donnent droit aux revenus générés.\nCalcul du prix et Slippage\nLe prix sur la bourse Uniswap dépend de l&#8217;équilibre des jetons dans le pool. Si une transaction est très importante par rapport à la taille de la réserve, le prix peut varier pendant l&#8217;exécution : c&#8217;est ce qu&#8217;on appelle le &#8220;slippage&#8221; (glissement de prix). Pour les utilisateurs, il est crucial de régler une tolérance au slippage acceptable avant de valider pour éviter les mauvaises surprises, surtout sur les jetons peu liquides.\nUtiliser Uniswap au quotidien\nLa plateforme a été pensée pour être intuitive. L&#8217;interface est épurée et les opérations de base se font en quelques clics.\nConnecter son portefeuille\nC’est la première étape indispensable. Sans portefeuille, impossible d&#8217;utiliser la bourse Uniswap. La plateforme supporte les portefeuilles Web3 les plus populaires comme MetaMask ou WalletConnect. Il n&#8217;y a pas de mot de passe à retenir sur le site ; la connexion se fait par une simple signature numérique depuis votre application de portefeuille.\nÉchanger des jetons et gagner des frais\nL&#8217;échange de jetons est la fonction principale. Vous choisissez ce que vous donnez, ce que vous voulez recevoir, et l&#8217;algorithme s&#8217;occupe du reste. Mais vous pouvez aussi passer du côté &#8220;fournisseur&#8221; en ajoutant vos propres fonds aux pools pour générer des revenus passifs. C&#8217;est une excellente façon de faire fructifier ses actifs, même s&#8217;il faut garder à l&#8217;esprit le risque de &#8220;perte temporaire&#8221; (impermanent loss) lié à la volatilité.\nÉvolution, risques et conclusion\nLe protocole a beaucoup évolué, de la V1 à la V3, améliorant sans cesse l&#8217;efficacité du capital et la sécurité des contrats intelligents. Cependant, la bourse Uniswap comporte des défis : les frais de réseau sur Ethereum peuvent être élevés en période de forte activité, et il n&#8217;y a pas de service client pour annuler une transaction. Vous êtes votre propre banque.En conclusion, Uniswap a posé les bases de la finance de demain. Comprendre son fonctionnement permet de voir le marché crypto sous un nouvel angle : celui de la liberté et de la transparence totale, sans contrôle centralisé.","Introduction La décentralisation a transformé notre rapport à la finance. 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