{"id":15703,"date":"2026-01-03T11:45:00","date_gmt":"2026-01-03T10:45:00","guid":{"rendered":"https:\/\/www.blog.bim.finance\/?p=15703"},"modified":"2026-01-07T16:48:59","modified_gmt":"2026-01-07T15:48:59","slug":"what-is-a-smart-contract-web3-web2-bridge","status":"publish","type":"post","link":"https:\/\/www.blog.bim.finance\/en\/what-is-a-smart-contract-web3-web2-bridge\/","title":{"rendered":"What is a smart contract? The bridge between Web3 and Web2"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"15703\" class=\"elementor elementor-15703\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3d4847c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3d4847c\" 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-1323015\" data-id=\"1323015\" 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-c567f20 elementor-widget elementor-widget-heading\" data-id=\"c567f20\" 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\">What a smart contract is<\/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-660e68e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"660e68e\" 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-200e550\" data-id=\"200e550\" 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-70c6a7b elementor-widget elementor-widget-text-editor\" data-id=\"70c6a7b\" 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 class=\"p1\">A smart contract is a computer program that runs on a blockchain network. It automatically executes actions when specific conditions are met. Nick Szabo <em>(computer scientist known for his research in smart contracts)<\/em> described smart contracts as digital promises with protocols for performance. Many people compare the idea to a vending machine that enforces rules automatically. On blockchains like Ethereum, the contract code is stored and executed by the network. This means no single company can secretly change the rules after deployment. In practice, smart contracts can move tokens, issue receipts, or enforce simple agreements. They work best for clear \u201cif this happens, then do that\u201d logic. A smart contract is not the same as a traditional legal contract in every case. It is closer to software that reliably follows prewritten rules.<\/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-9062345 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9062345\" 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-783d6be\" data-id=\"783d6be\" 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-256470a elementor-widget elementor-widget-image\" data-id=\"256470a\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/media.geeksforgeeks.org\/wp-content\/uploads\/20220527093234\/Howdoesasmartcontractwork1.jpg?w=800&#038;ssl=1\" title=\"\" alt=\"Smart Contracts in Blockchain - GeeksforGeeks\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">How run Smart Contracts in Blockchain - GeeksforGeeks<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\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-3a89eee elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3a89eee\" 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-f29f586\" data-id=\"f29f586\" 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-23d0891 elementor-widget elementor-widget-heading\" data-id=\"23d0891\" 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\">Why it bridges Web3 and Web2<\/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-b552ed9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b552ed9\" 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-629ad7e\" data-id=\"629ad7e\" 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-27d0047 elementor-widget elementor-widget-text-editor\" data-id=\"27d0047\" 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 class=\"p1\">Web3 apps run on blockchains and can execute smart contracts automatically. Web2 services run on normal servers, like banks, websites, and payment processors. Smart contracts cannot directly fetch data from outside the blockchain. This is why oracles exist, acting as bridges between real-world systems and smart contracts. Oracles can deliver verified data, like prices, weather, or payment status, onto the blockchain. Once the oracle provides the data, a smart contract can respond automatically. This is how a Web3 application can react to a Web2 event, like a delivery confirmation. It is also how blockchains can use external price feeds for lending and trading. In simple terms, smart contracts handle the rules, while oracles bring the facts.<\/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-7135afe elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7135afe\" 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-0526fe9\" data-id=\"0526fe9\" 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-a63d5d1 elementor-widget elementor-widget-image\" data-id=\"a63d5d1\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/coingeek.com\/wp-content\/uploads\/2022\/01\/smart-contract-based-oracle-slashing-1-min.png?w=800&#038;ssl=1\" title=\"\" alt=\"Smart contract-based oracle slashing - CoinGeek\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Bridge between Web3 and Web2: Smart contract-based oracle slashing - CoinGeek<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\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-7fc8f96 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7fc8f96\" 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-b86e000\" data-id=\"b86e000\" 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-66d4135 elementor-widget elementor-widget-heading\" data-id=\"66d4135\" 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\">Real examples and limits<\/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-90d795d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"90d795d\" 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-cb7c587\" data-id=\"cb7c587\" 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-b60be95 elementor-widget elementor-widget-text-editor\" data-id=\"b60be95\" 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 class=\"p1\">In decentralised finance, smart contracts can lend and borrow without a bank approving each transaction. In simple marketplaces, they can swap tokens when both sides meet conditions. In insurance-style products, an oracle can report an event and trigger a payout. These systems reduce manual paperwork and can speed up settlement. However, smart contracts can also contain bugs and lose funds if written poorly. They also cannot interpret nuance like human agreements can. Many projects therefore combine smart contracts with audits and safety controls. The safest use cases keep rules simple and data sources transparent. As Web3 grows, smart contracts may become the automation layer behind many Web2 services. They offer a path for digital agreements that are open, testable, and predictable.<\/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-e73d290 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e73d290\" 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-1484fc8\" data-id=\"1484fc8\" 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-0dc3f43 elementor-widget elementor-widget-text-editor\" data-id=\"0dc3f43\" 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><strong>Sources:<\/strong><\/p><ul><li><a href=\"https:\/\/ethereum.org\/developers\/docs\/smart-contracts\/\">ethereum.com &#8211; Smart contracts<\/a><\/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<\/div>","protected":false},"excerpt":{"rendered":"<p>Smart contracts are self-running programs on blockchains like Ethereum. They automate agreements and connect Web3 to Web2 using oracles and APIs. Let&rsquo;s discover this concept.<\/p>","protected":false},"author":18,"featured_media":15704,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[153],"tags":[154],"ppma_author":[145],"class_list":["post-15703","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","tag-learn"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is a smart contract? The bridge between Web3 and Web2 - BIM Blog<\/title>\n<meta name=\"description\" content=\"A smart contract is code on a blockchain that runs automatically when conditions are met. 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