{"id":4844,"date":"2020-12-09T23:33:52","date_gmt":"2020-12-09T20:33:52","guid":{"rendered":"https:\/\/alfacash.blog\/?p=4844"},"modified":"2024-02-19T21:52:42","modified_gmt":"2024-02-19T18:52:42","slug":"vad-ar-smarta-kontrakt-vad-de-for","status":"publish","type":"post","link":"https:\/\/alfacash.blog\/sv\/2020\/12\/09\/vad-ar-smarta-kontrakt-vad-de-for\/","title":{"rendered":"Vad i helvete \u00e4r smarta kontrakt? En enkel guide"},"content":{"rendered":"<p>F\u00f6rmodligen vet du redan vad ett (traditionellt) kontrakt \u00e4r, eller hur? L\u00e5t oss komma ih\u00e5g det \u00e4nd\u00e5. Enligt Merriam-Webster-ordlistan \u00e4r ett kontrakt \u201dett bindande avtal mellan tv\u00e5 eller flera personer eller parter, s\u00e4rskilt en som \u00e4r lagligt genomf\u00f6rbar\u201d. N\u00e5v\u00e4l, vad \u00e4r det f\u00f6rsta du kommer att t\u00e4nka p\u00e5 n\u00e4r vi s\u00e4ger &quot;smarta kontrakt&quot;?<\/p>\n\n\n\n<p>Ligger dokumentet p\u00e5 en surfplatta, kanske? \u00c4r det nu en robot? En AI, bakom en dator? Det \u00e4r bara ... anslutet till Internet? Inte exakt. Om du kontrollerar andra k\u00e4llor (som den tillf\u00f6rlitliga Wikipedia), kommer de att s\u00e4ga n\u00e5got liknande <strong>ett smart kontrakt \u00e4r ett \u201cdigitalt protokoll\u201d eller \u201cdatorprogram\u201d som k\u00f6r sina f\u00f6rutbest\u00e4mda villkor automatiskt<\/strong> n\u00e4r dessa uppfylls.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"482\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-1024x482.jpg\" alt=\"\" class=\"wp-image-4850\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-1024x482.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-300x141.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-150x71.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-18x8.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-270x127.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-770x363.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-1078x508.jpg 1078w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-900x424.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-370x174.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-554x261.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-306x144.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-260x122.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-87x41.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>BIld av Gerd Altmann fr\u00e5n Pixabay<\/figcaption><\/figure><\/div>\n\n\n\n<p>Trevligt, va ...? Och vad i all jord betyder det? Vi kan f\u00f6rklara det p\u00e5 det h\u00e4r s\u00e4ttet: ett smart kontrakt \u00e4r inte n\u00e5got du kan r\u00f6ra eller till och med se ordentligt. F\u00f6r det mesta ser du bara resultaten, ungef\u00e4r som med ledningarna inuti din TV. Skillnaden \u00e4r den h\u00e4r g\u00e5ngen dessa resultat \u00e4r helt digitala eftersom det \u00e4r ett digitalt avtal baserat p\u00e5 <a href=\"https:\/\/alfacash.blog\/2020\/08\/30\/dummies-what-is-blockchain-how-it-works\/\" target=\"_blank\" rel=\"noreferrer noopener\">en blockchain<\/a>, skriven med ber\u00e4kningskod f\u00f6r att uppr\u00e4tth\u00e5lla de tidigare villkor som parterna kommit \u00f6verens om. Du kan t\u00e4nka p\u00e5 det som ett automatiskt avtal eller en garanti, som inte beh\u00f6ver n\u00e5gon papper, advokat, notarie eller mellanh\u00e4nder i allm\u00e4nhet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>S\u00e5 ... hur smarta kontrakt fungerar f\u00f6r din genomsnittliga kille?<\/strong><\/h2>\n\n\n\n<p>Det korta svaret \u00e4r med digitala appar eller verktyg. Om du inte vet hur man skriver kod (som utvecklare eller datortekniker), kommer du inte att ha ansvaret f\u00f6r att skapa dem, s\u00e5 oroa dig inte. L\u00e4mna uppgiften till experterna. <strong>F\u00f6r att anv\u00e4nda dem beh\u00f6ver du bara v\u00e4lja en smart-kontraktbaserad app (vanligtvis decentraliserade appar) eller plattform<\/strong> och g\u00e5 med den p\u00e5 din enhet (mobil eller station\u00e4r).<\/p>\n\n\n\n<p>Vi kan dock prata lite om det interna arbetet med ett smart kontrakt. F\u00f6rst och fr\u00e4mst, l\u00e5t oss kontrollera en bild f\u00f6r att visa dig hur de ser inuti. Spoiler: det \u00e4r lite tr\u00e5kigt. Det \u00e4r bara en massa kod.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"331\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-1024x331.jpg\" alt=\"\" class=\"wp-image-4851\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-1024x331.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-300x97.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-150x49.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-18x6.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-270x87.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-770x249.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-1170x378.jpg 1170w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-900x291.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-370x120.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-554x179.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-306x99.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-260x84.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-87x28.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Exempel p\u00e5 smart kontrakt. K\u00e4lla: Ethereum.org<\/figcaption><\/figure><\/div>\n\n\n\n<p>Vi kan ocks\u00e5 kontrollera deras data p\u00e5 en <a href=\"https:\/\/etherscan.io\/address\/0xf4985070ce32b6b1994329df787d1acc9a2dd9e2\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">blockchain explorer<\/a> (en tillg\u00e4nglig webbsida), om det \u00e4r offentligt, f\u00f6rst\u00e5s. Bankerna utvecklar sina egna applikationer med smarta kontrakt, s\u00e5 de \u00e4r inte offentliga. Men vi kan till exempel kontrollera ett genomsnittligt kontrakt p\u00e5 Ethereum.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"450\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-1024x450.jpg\" alt=\"\" class=\"wp-image-4852\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-1024x450.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-300x132.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-150x66.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-18x8.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-270x119.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-770x338.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-1157x508.jpg 1157w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-900x395.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-370x163.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-554x243.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-306x134.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-260x114.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-87x38.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan.jpg 1168w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Exempel p\u00e5 offentliga uppgifter i ett smart kontrakt. K\u00e4lla: Etherscan<\/figcaption><\/figure><\/div>\n\n\n\n<p>Vi uppt\u00e4cker h\u00e4r en viktig sak om smarta kontrakt. <strong>F\u00f6rutom kod best\u00e5r de av transaktioner och ett monet\u00e4rt saldo. <\/strong>Detta betyder dock inte att den enda anv\u00e4ndningen f\u00f6r dem m\u00e5ste vara ekonomisk: transaktionerna kan ocks\u00e5 representera information. N\u00e4r det g\u00e4ller balansen \u00e4r sanningen att decentraliserade smarta kontrakt kr\u00e4ver vissa avgifter f\u00f6r att fungera (vanligtvis i form av kryptovalutor), avsedda att <a href=\"https:\/\/alfacash.blog\/2020\/08\/25\/cryptocurrency-mining-dummies-how-works\/\" target=\"_blank\" rel=\"noreferrer noopener\">gruvarbetare eller validerare<\/a> av blockchain.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Processen \u00e4r som ...<\/strong><\/h2>\n\n\n\n<p>Inuti Ethereum \u00e4r ett kontrakt till exempel r\u00e4ttvist <a href=\"https:\/\/ethereum.org\/en\/developers\/docs\/smart-contracts\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">en annan typ av adress<\/a> (pl\u00e5nbok \/ konto), med saldo och transaktioner. Men \u00e4r en slags kollektiv adress, utformad f\u00f6r att fungera som en bro mellan tv\u00e5 eller flera parter, med f\u00f6rinst\u00e4llda villkor. D\u00e4rf\u00f6r styrs inte denna adress bara av en anv\u00e4ndare utan av sina egna tidigare \u00f6verenskomna villkor, som till\u00e4mpas av hela Ethereum-n\u00e4tverket.<\/p>\n\n\n\n<p><strong>Utl\u00f6saren f\u00f6r att denna adress ska g\u00f6ra n\u00e5got (som att automatiskt handla pengar) \u00e4r en h\u00e4ndelse som parterna f\u00f6rv\u00e4ntar sig<\/strong>. Det kan vara en f\u00f6rs\u00e4ljning, ett betalningsdatum, en registrering av n\u00e5got, en ny produkt online, <a href=\"https:\/\/alfacash.blog\/2020\/08\/22\/bitcoin-to-the-moon-5-predictions-for-2021-and-beyond\/\" target=\"_blank\" rel=\"noreferrer noopener\">en prisf\u00f6r\u00e4ndring<\/a>, en omr\u00f6stning eller till och med sportresultaten.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"575\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-1024x575.jpg\" alt=\"\" class=\"wp-image-4853\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-1024x575.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-300x169.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-150x84.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-18x10.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-270x152.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-770x433.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-904x508.jpg 904w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-900x506.jpg 900w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-370x208.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-554x311.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-306x172.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-260x146.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-87x49.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>BIld av kinkate fr\u00e5n Pixabay<\/figcaption><\/figure><\/div>\n\n\n\n<p>Avtalet str\u00e4cker sig efter den information som tillhandah\u00e5lls om det av de inblandade parterna eller av ett \u201dorakel\u201d (en programvara som konsulterar externa k\u00e4llor) och agerar som en f\u00f6ljd av dess f\u00f6rinst\u00e4llda villkor.<\/p>\n\n\n\n<p><strong>Sammanfattningsvis \u00e4r detta processen:<\/strong><\/p>\n\n\n\n<p>1. Parterna f\u00f6rhandlar om villkoren i kontraktet (eller f\u00f6retaget \/ utvecklaren g\u00f6r dem offentliga f\u00f6r alla som vill g\u00e5 med).<br>2. Utvecklaren bygger protokollet i en vald blockchain (<a href=\"https:\/\/alfacash.blog\/2020\/11\/14\/ethereum-2-new-features-prices-more-ethereum-chains\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ethereum<\/a>, EOS, Tron, Cardano, RSK, etc.), med de \u00f6verenskomna villkoren.<br>3. Kontraktet och dess villkor \u00e4r representerade i en adress till en s\u00e5dan blockchain.<br>4. H\u00e4ndelsen h\u00e4nder.<br>5. Avtalet g\u00f6r transaktionerna enligt resultatet av n\u00e4mnda h\u00e4ndelse.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>Alice och Bob anv\u00e4nde smarta kontrakt<\/strong><\/h2>\n\n\n\n<p>Naturligtvis beh\u00f6ver vi ett klassiskt exempel med Alice och Bob. L\u00e5t oss s\u00e4ga att Alice kommer att satsa $500 med Bob om <a href=\"https:\/\/alfacash.blog\/2020\/11\/28\/bitcoin-price-will-reach-60k-mid-2021-new-study\/\" target=\"_blank\" rel=\"noreferrer noopener\">Bitcoin pris<\/a> f\u00f6r n\u00e4sta helg. Bob tror att det kommer att vara upp till X dollar, medan Alice tror att det kommer att vara ner X dollar.<\/p>\n\n\n\n<p>S\u00e5 de best\u00e4mmer sig f\u00f6r att bygga ett smart kontrakt (appellerar till en utvecklare eller en plattform-som-en-tj\u00e4nst) och st\u00e4ller in sina villkor. <strong>Pengarna ($500) kommer att deponeras i kryptovaluta till kontraktet,<\/strong> och om priset p\u00e5 Bitcoin stiger upp X f\u00f6r n\u00e4sta helg kommer kontrakten automatiskt att \u00f6verf\u00f6ra pengarna till Bob. Om priset p\u00e5 <a href=\"https:\/\/alfacash.blog\/2020\/11\/25\/how-to-start-bitcoin-cryptos-5-steps\/\" target=\"_blank\" rel=\"noreferrer noopener\">Bitcoin<\/a> g\u00e5r ner X, g\u00e5r medlen till Alice adress. Och det \u00e4r allt.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-1024x682.jpg\" alt=\"Bitcoin-15000-bull-run\" class=\"wp-image-4624\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-1024x682.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-150x100.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-260x173.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-87x58.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-300x200.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled-18x12.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-scaled.jpg 270w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-770x513.jpg 770w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-762x508.jpg 762w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-773x515.jpg 773w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-370x247.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-554x369.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-306x204.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-368x245.jpg 368w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p>Nu, en annan situation, den h\u00e4r g\u00e5ngen som involverar lite Internet of Things (IoT). Alice vill hyra sitt hus till Bob, och hon har f\u00f6rdelen med ett installerat smartl\u00e5s som styrs digitalt f\u00f6r att \u00f6ppna och st\u00e4nga d\u00f6rren. S\u00e5 de bygger ett smart kontrakt och st\u00e4ller in dessa villkor: Bob kommer att betala X dollar i krypto varje m\u00e5nad.<\/p>\n\n\n\n<p>Om han inte g\u00f6r det p\u00e5 tv\u00e5 m\u00e5nader, <strong>kontraktet kommer att best\u00e4lla smartl\u00e5set f\u00f6r att h\u00e5lla d\u00f6rren (och tillg\u00e5ngen till huset) st\u00e4ngd.<\/strong> P\u00e5 detta s\u00e4tt f\u00f6rs\u00e4krar Alice att vederb\u00f6rligen erh\u00e5lla den \u00f6verenskomna siffran, och Bob beh\u00f6ver inte samla in fler dokument eller n\u00f6dv\u00e4ndigheter f\u00f6r Alice.<\/p>\n\n\n\n<p>Och ja, det \u00e4r ju en typ av kontrakt. Fantasin \u00e4r gr\u00e4nsen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>N\u00e5gra popul\u00e4ra anv\u00e4ndningsomr\u00e5den f\u00f6r smarta kontrakt<\/strong><\/h2>\n\n\n\n<p>Det finns redan hundratals smarta kontraktsbaserade appar med m\u00e5nga kategorier och funktioner. B\u00f6rser, spel, spel, investeringar, fastigheter, h\u00e4lso- och sjukv\u00e5rd, marknadsplatser, omr\u00f6stningar ... de arbetar alla med smarta kontrakt.<\/p>\n\n\n\n<p>Kanske kan n\u00e5gra av dessa Dapps (som inte i sig \u00e4r smarta kontrakt, men arbetar med dem) ringa en klocka till dig. CryptoKitties (samlarobjekt), Uniswap (utbyte), Aragon (styrning), District0x (marknadsplatser och samh\u00e4llen), Augur (f\u00f6ruts\u00e4gelsemarknad), Synthetix (f\u00f6r syntetiska tillg\u00e5ngar), Axie Infinity (spel), Grid + (energi) och Actifit (h\u00e4lsa) \u00e4r bara exempel. <strong>Enligt <a href=\"https:\/\/www.stateofthedapps.com\/dapps\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Dapps-staten<\/a>, det finns \u00f6ver 2500 av dem.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"730\" src=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-1024x730.jpg\" alt=\"\" class=\"wp-image-4854\" srcset=\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-1024x730.jpg 1024w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-300x214.jpg 300w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-150x107.jpg 150w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-18x12.jpg 18w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-253x180.jpg 253w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-723x515.jpg 723w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-713x508.jpg 713w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-370x264.jpg 370w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-554x395.jpg 554w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-306x218.jpg 306w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-344x245.jpg 344w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-260x185.jpg 260w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-87x62.jpg 87w, https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>BIld av Edar fr\u00e5n Pixabay<\/figcaption><\/figure><\/div>\n\n\n\n<p>Och du vet vad som fungerar med dessa kontrakt? Hela <a href=\"https:\/\/alfacash.blog\/2020\/09\/09\/how-to-make-thousands-dollars-defi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Decentraliserad ekonomi (DeFi)<\/a> ekosystem, en boom idag. Vi kan hitta en hel del investeringsverktyg (f\u00f6r <a href=\"https:\/\/alfacash.blog\/2020\/10\/07\/meet-best-performing-bold-platforms-yield-farming\/\" target=\"_blank\" rel=\"noreferrer noopener\">avkastning jordbruk<\/a>, mestadels), l\u00e5n, f\u00f6rs\u00e4kringar, sparande och mer. Plattformar som Yearn Finance, Compound, UMA, Maker, Curve och <a href=\"https:\/\/alfacash.blog\/2020\/11\/22\/defi-protocol-pickle-finance-suffered-19m-hack-loses-value\/\" target=\"_blank\" rel=\"noreferrer noopener\">Pickle Finance<\/a> tillh\u00f6r denna kategori.<\/p>\n\n\n\n<p>Ut\u00f6ver detta har banker och f\u00f6retag som BBVA, Bankia, Sabadell, CaixaBank, IBM, Microsoft, Google, Ernst &amp; Young, S7 Airlines, <a href=\"https:\/\/alfacash.blog\/2020\/12\/01\/givingtuesday-here-again-lot-cryptocurrencies\/\" target=\"_blank\" rel=\"noreferrer noopener\">BitGive<\/a>, Money on Chain och OneSmart City testar antingen smarta kontrakt f\u00f6r att f\u00f6rb\u00e4ttra sina tj\u00e4nster eller anv\u00e4nder dem redan i olika applikationer. S\u00e5 som ni ser \u00e4r vi redan fulla av dessa kontrakt.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"has-text-align-center\"><em>Vill du handla BTC, ETH och andra tokens? Du kan g\u00f6ra det<\/em>\u00a0<em>s\u00e4kert\u00a0<a href=\"https:\/\/www.alfa.cash\/buy\/bitcoin\" target=\"_blank\" rel=\"noreferrer noopener\">p\u00e5 Alfacash<\/a>! Och gl\u00f6m inte att vi pratar om detta och m\u00e5nga andra saker p\u00e5 v\u00e5ra sociala medier.<br><br><\/em><a href=\"https:\/\/twitter.com\/alfacash_crypto\" target=\"_blank\" rel=\"noreferrer noopener\">Twitter<\/a>\u00a0*\u00a0<a href=\"https:\/\/t.me\/AlfacashCommunity\" target=\"_blank\" rel=\"noreferrer noopener\">Telegram<\/a>\u00a0*\u00a0<a href=\"https:\/\/www.instagram.com\/alfacashstore\" target=\"_blank\" rel=\"noreferrer noopener\">Instagram<\/a> * <a href=\"https:\/\/www.youtube.com\/channel\/UCOl4fdRHj8AseQ5b6z9udaw\" target=\"_blank\" rel=\"noreferrer noopener\">Youtube<\/a>\u00a0*<a href=\"https:\/\/www.facebook.com\/alfacashstore\" target=\"_blank\" rel=\"noreferrer noopener\">Facebook<\/a>\u00a0\u00a0*\u00a0<a href=\"https:\/\/vk.com\/alfacashcrypto\" target=\"_blank\" rel=\"noreferrer noopener\">Vkontakte<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Smarta kontrakt l\u00e5ter som en knepig term, s\u00e4rskilt n\u00e4r de f\u00f6rs\u00f6ker f\u00f6rklara det. L\u00e5t oss kolla en enkel beskrivning och anv\u00e4ndningsomr\u00e5den.<\/p>","protected":false},"author":5,"featured_media":4848,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[48],"tags":[86,61,44,84,107,199],"class_list":{"0":"post-4844","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-learn","8":"tag-blockchain","9":"tag-cryptocurrencies","10":"tag-decentralization","11":"tag-defi","12":"tag-ethereum","13":"tag-smart-contracts"},"featured_image_src":"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contracts-Guide-Alfacash.png","author_info":{"display_name":"Isabel P\u00e9rez","author_link":"https:\/\/alfacash.blog\/sv\/author\/isabel\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.4 (Yoast SEO v25.4) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What on earth are smart contracts? 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