{"id":7054,"date":"2024-09-20T00:50:18","date_gmt":"2024-09-19T22:50:18","guid":{"rendered":"https:\/\/web3factory.net\/pt-pt\/posts\/oracles-the-intermediary-between-real-world-data-and-blockchain\/"},"modified":"2025-02-08T22:17:25","modified_gmt":"2025-02-08T21:17:25","slug":"oraculos-o-intermediario-entre-os-dados-e-a-cadeia-de-blocos","status":"publish","type":"post","link":"https:\/\/web3factory.net\/pt-pt\/posts\/oraculos-o-intermediario-entre-os-dados-e-a-cadeia-de-blocos\/","title":{"rendered":"Or\u00e1culos: O intermedi\u00e1rio entre os dados e a cadeia de blocos"},"content":{"rendered":"<span class=\"simplefavorite-button\" data-postid=\"7054\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"box-shadow:none;-webkit-box-shadow:none;-moz-box-shadow:none;\"><label class=\"favoritebtn\"><i aria-hidden=\"true\" class=\"fas fa-bookmark favoritesize\"><\/i><span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-custom\">\u200e\u200e \u200e \u200e Adicionar \u00e0 minha lista \u200e \u200e <\/span><\/label><\/span>\n<p>Os or\u00e1culos atuam como pontes, conectando contratos inteligentes na <span tabindex='0' class='glossary-item-container'>blockchain<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Blockchain<\/span> <span class='glossary-item-description'>Um livro-raz\u00e3o p\u00fablico e imut\u00e1vel de transa\u00e7\u00f5es criptogr\u00e1ficas, organizado em blocos.<\/span><\/span><\/span> com dados externos. Eles podem recuperar, verificar e transmitir informa\u00e7\u00f5es de fontes como bancos de dados, APIs e outras redes, tornando-as acess\u00edveis na cadeia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-como-funcionam\"><strong><span style=\"text-decoration: underline;\">Como Funcionam?<\/span><\/strong><\/h3>\n\n\n\n<p>Os or\u00e1culos permitem a cria\u00e7\u00e3o de contratos inteligentes h\u00edbridos, onde o c\u00f3digo on-chain e a infraestrutura off-chain s\u00e3o combinados para apoiar aplicativos descentralizados (dApps) que respondem a eventos do mundo real e interagem com sistemas tradicionais.<\/p>\n\n\n\n<p>Ao fornecer acesso Web3 a fontes de dados externas (off-chain) e a sistemas existentes, os or\u00e1culos permitem que as aplica\u00e7\u00f5es interajam com um ambiente fora da blockchain, facilitando aplica\u00e7\u00f5es do mundo real. Esses dados podem incluir pre\u00e7os de ativos, cifras macroecon\u00f4micas, resultados esportivos e mais.<\/p>\n\n\n\n<p>Seu papel \u00e9 crucial porque nas Finan\u00e7as Descentralizadas (<span tabindex='0' class='glossary-item-container'>DeFi<span class='glossary-item-hidden-content'><span class='glossary-item-header'>DeFi<\/span> <span class='glossary-item-description'>Os servi\u00e7os de DeFi usam smart contracts, protocolos descentralizados e tokens para oferecer uma gama de servi\u00e7os financeiros que, \u00e0s vezes, podem substituir os oferecidos pelos bancos, como empr\u00e9stimos\/empr\u00e9stimos, gerenciamento de ativos, seguros ou troca de ativos.<\/span><\/span><\/span>), que dependem de informa\u00e7\u00f5es off-chain, \u00e9 essencial contar com um mecanismo <span tabindex='0' class='glossary-item-container'>oracle<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Oracle<\/span> <span class='glossary-item-description'>Um servi\u00e7o que fornece dados fora da cadeia para uma blockchain, permitindo que contratos inteligentes interajam com informa\u00e7\u00f5es do mundo real.<\/span><\/span><\/span> confi\u00e1vel, fluido, inalter\u00e1vel e n\u00e3o manipul\u00e1vel.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"284\" src=\"https:\/\/web3factory.net\/wp-content\/uploads\/2024\/09\/oracle.png\" alt=\"\" class=\"wp-image-4859\" srcset=\"https:\/\/web3factory.net\/wp-content\/uploads\/2024\/09\/oracle.png 750w, https:\/\/web3factory.net\/wp-content\/uploads\/2024\/09\/oracle-300x114.png 300w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tipos-de-oraculos\"><strong><span style=\"text-decoration: underline;\">Tipos de Or\u00e1culos<\/span><\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Or\u00e1culos de Dados:<\/strong> Fornecem dados externos para contratos inteligentes, como pre\u00e7os de criptomoedas ou taxas de c\u00e2mbio.<\/li>\n\n\n\n<li><strong>Or\u00e1culos de C\u00e1lculo:<\/strong> Realizam c\u00e1lculos externos e retornam os resultados para contratos inteligentes.<\/li>\n\n\n\n<li><strong>Or\u00e1culos de Hardware:<\/strong> Conectam contratos inteligentes a dispositivos f\u00edsicos, permitindo a intera\u00e7\u00e3o com o mundo real.<\/li>\n<\/ul>\n\n\n\n<p>Chainlink, com sua criptomoeda LINK, \u00e9 o or\u00e1culo mais antigo e conhecido no ecossistema. Representa mais de 75% dos projetos de or\u00e1culos e est\u00e1 presente em grandes projetos DeFi, como AAVE.<\/p>\n\n\n\n<p>Como muitos projetos, \u00e9 importante distinguir entre o projeto e seu <span tabindex='0' class='glossary-item-container'>token<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Token<\/span> <span class='glossary-item-description'>Um ativo digital emitido em um blockchain, representando v\u00e1rios utilit\u00e1rios, direitos ou valores.<\/span><\/span><\/span> e seus respectivos usos. O LINK \u00e9 frequentemente criticado porque seu token \u00e9 percebido como tendo uma utilidade limitada, al\u00e9m de potenciais vendas massivas no mercado por parte de sua equipe.<\/p>\n\n\n\n<p>Outros or\u00e1culos not\u00e1veis incluem Band Protocol, Pyth Network, DIA, e mais. Para comparar diferentes abordagens de protocolo e seus tokens, este artigo pode ser \u00fatil: <a href=\"https:\/\/hackernoon.com\/oracles-revenue-and-tokenomics\"> Hacker Noon &#8211; Oracles Revenue and Tokenomics<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-redes-de-oraculos-descentralizadas\"><strong><span style=\"text-decoration: underline;\">Redes de Or\u00e1culos Descentralizadas<\/span><\/strong><\/h3>\n\n\n\n<p>Os or\u00e1culos devem ser confi\u00e1veis e seguros para garantir a integridade dos contratos inteligentes. Eles precisam ser resistentes \u00e0 manipula\u00e7\u00e3o e \u00e0 desinforma\u00e7\u00e3o, assegurando que os contratos inteligentes recebam dados precisos e atualizados.<\/p>\n\n\n\n<p>Um or\u00e1culo centralizado, se sofrer uma desconex\u00e3o espont\u00e2nea, poderia levar a um protocolo DeFi a perder acesso a informa\u00e7\u00f5es e potencialmente descarrilar todo o projeto, dada a natureza automatizada de tais sistemas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-casos-de-uso\"><strong><span style=\"text-decoration: underline;\">Casos de Uso<\/span><\/strong><\/h3>\n\n\n\n<p>Imagine um contrato inteligente para um seguro contra intemp\u00e9ries. Se a temperatura exceder um certo limite, o contrato \u00e9 executado automaticamente e uma compensa\u00e7\u00e3o \u00e9 paga. Os or\u00e1culos desempenham um papel crucial aqui ao fornecer dados meteorol\u00f3gicos precisos e em tempo real para o contrato inteligente, permitindo uma execu\u00e7\u00e3o suave e autom\u00e1tica com base nas condi\u00e7\u00f5es clim\u00e1ticas reais.<\/p>\n\n\n\n<p>Outros exemplos incluem: precifica\u00e7\u00e3o de ativos para finan\u00e7as, aleatoriedade para jogos, sensores IoT para cadeias de suprimento, verifica\u00e7\u00e3o de identidade para fins governamentais, etc.<\/p>\n\n\n\n<p>No universo DeFi, os or\u00e1culos servem, entre outras coisas, as seguintes aplica\u00e7\u00f5es, com exemplos de projetos que utilizam Chainlink:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Feed de Pre\u00e7os:<\/strong> Mercados monet\u00e1rios (AAVE)<\/li>\n\n\n\n<li><strong>Pre\u00e7o Subjacente:<\/strong> Peg de <span tabindex='0' class='glossary-item-container'>stablecoin<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Stablecoin<\/span> <span class='glossary-item-description'>Uma criptomoeda vinculada a um ativo est\u00e1vel, como a moeda fiduci\u00e1ria, para minimizar a volatilidade.<\/span><\/span><\/span>, valores sint\u00e9ticos (Synthetix)<\/li>\n\n\n\n<li><strong>Determina\u00e7\u00e3o de Pre\u00e7os:<\/strong> Contratos de futuros e op\u00e7\u00f5es (Lyra)<\/li>\n\n\n\n<li><strong>Prova de Reserva on-chain:<\/strong> (RenBTC)<\/li>\n\n\n\n<li><strong>Gest\u00e3o Automatizada de Ativos:<\/strong> (Pickle Finance)<\/li>\n<\/ul>\n\n\n\n<p>Inova\u00e7\u00f5es como o CCIP (Cross Chain Interoperability Protocol) permitem a transfer\u00eancia de informa\u00e7\u00f5es e\/ou tokens entre cadeias (C\u00f3digo Aberto).<\/p>\n\n\n\n<p>Para explorar mais casos do mundo real, aqui est\u00e1 uma lista de solu\u00e7\u00f5es fornecidas pela Chainlink: <a href=\"https:\/\/blog.chain.link\/smart-contract-use-cases\/\"> Chainlink Blog &#8211; Smart Contract Use Cases<\/a>.<\/p>\n\n\n\n<p><strong><span style=\"text-decoration: underline;\">Conclus\u00e3o<\/span><\/strong><\/p>\n\n\n\n<p>Os or\u00e1culos s\u00e3o vitais para o funcionamento atual de DeFi e sua conex\u00e3o com o mundo real, trazendo consigo um conjunto de perguntas:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Os or\u00e1culos podem escalar o suficiente sem criar problemas de seguran\u00e7a (sem lat\u00eancia durante alta volatilidade) ou econ\u00f4micos (custos relacionados ao processamento de big data e taxas de g\u00e1s inerentes)?<\/li>\n\n\n\n<li>As incentivas s\u00e3o adequadas para operar os or\u00e1culos de maneira otimizada e segura?<\/li>\n\n\n\n<li>Os or\u00e1culos s\u00e3o suficientemente descentralizados para evitar ataques centrais, erros e, assim, comprometer o funcionamento das Finan\u00e7as Descentralizadas?<\/li>\n<\/ul>\n\n\n\n<p>Nesse contexto, alguns acreditam que o futuro de DeFi deve ser desenvolvido sem depend\u00eancias externas, como visto em projetos como Ajna, Ethereum Credit Guild, Metastreet\u2019s Automated Tranche <span tabindex='0' class='glossary-item-container'>Maker<span class='glossary-item-hidden-content'><span class='glossary-item-header'>Maker<\/span> <span class='glossary-item-description'>Entidade que fornece liquidez a um mercado por meio da coloca\u00e7\u00e3o de ordens limitadas.<\/span><\/span><\/span> e Blur\/Paradigm\u2019s Blend\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Descubra os or\u00e1culos e como eles conectam a blockchain a dados do mundo real para contratos inteligentes.<\/p>\n","protected":false},"author":2,"featured_media":13128,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[95,99],"tags":[],"class_list":["post-7054","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-capital-use","category-defi"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v23.5) - 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