{"id":90631,"date":"2020-08-04T01:42:10","date_gmt":"2020-08-03T23:42:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/ob-orakulah-dlya-blokchejnov-i-nemnogo-o-web3"},"modified":"2020-08-04T01:42:10","modified_gmt":"2020-08-03T23:42:10","slug":"ob-orakulah-dlya-blokchejnov-i-nemnogo-o-web3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/ob-orakulah-dlya-blokchejnov-i-nemnogo-o-web3","title":{"rendered":"Oracle-k a blokkl\u00e1ncok sz\u00e1m\u00e1ra \u00e9s egy kis bepillant\u00e1s a Web3-ba","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Jelenleg a blokkl\u00e1ncok er\u0151sen elszigeteltek a k\u00fcls\u0151 inform\u00e1ci\u00f3s forr\u00e1sokt\u00f3l \u2013 ak\u00e1r k\u00f6zpontos\u00edtott er\u0151forr\u00e1sokt\u00f3l, ak\u00e1r m\u00e1s blokkl\u00e1ncokt\u00f3l. Ahhoz, hogy a k\u00fcl\u00f6nb\u00f6z\u0151 blokkl\u00e1ncok \u00f6sszehangoltan m\u0171k\u00f6djenek \u00e9s k\u00f6nnyen adatokat cser\u00e9ljenek egym\u00e1ssal (\u00e9s a k\u00fcls\u0151 forr\u00e1sokkal), oracle-eket lehet haszn\u00e1lni. <\/p>\n<p><img decoding=\"async\" alt=\"Oracle-k a blokkl\u00e1ncok sz\u00e1m\u00e1ra \u00e9s egy kis bepillant\u00e1s a Web3-ba\" src=\"\/wp-content\/uploads\/2020\/08\/e543fd7b6bb7af69756880115d0dfbaf.png\" style=\"display:block;margin: 0 auto;\" \/><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Mi az az oracle?<\/h3>\n<p>\nAz oracle egy olyan rendszer, amely esem\u00e9nyeket k\u00fcls\u0151 forr\u00e1sb\u00f3l szerez be \u00e9s valid\u00e1lja azokat, majd tov\u00e1bb\u00edtja ezeket az adatokat a blokkl\u00e1ncra, hogy felhaszn\u00e1lhassuk \u0151ket okos szerz\u0151d\u00e9sekben (vagy ford\u00edtva). Az oracle-ek kritikus fontoss\u00e1g\u00faak az okos szerz\u0151d\u00e9sek sz\u00e1m\u00e1ra, mivel ezek szigor\u00faan meghat\u00e1rozottak. Az inform\u00e1ci\u00f3nak egy meghat\u00e1rozott csatorn\u00e1n kell \u00e9rkeznie az okos szerz\u0151d\u00e9sbe, amely k\u00e9pes meger\u0151s\u00edteni az adatok hiteless\u00e9g\u00e9t. <\/p>\n<p>T\u00f6bbf\u00e9le oracle l\u00e9tezik, amelyek k\u00fcl\u00f6nb\u00f6z\u0151 t\u00edpus\u00fa kapcsolatokat biztos\u00edtanak:<\/p>\n<ul>\n<li>szoftveres \u2013 adatokat szerez be az internetr\u0151l vagy m\u00e1s blokkl\u00e1ncokb\u00f3l;<\/li>\n<li>hardveres \u2013 k\u00fcl\u00f6nb\u00f6z\u0151 \u00e9rz\u00e9kel\u0151kt\u0151l szerez adatokat (<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/RFID\">RFID<\/a><\/noindex> c\u00edmk\u00e9k, okos otthon, nekem azonnal a logisztikai \u00e9s IoT alkalmaz\u00e1sok jutnak eszembe);\n<p><i>P\u00e9lda: egy okos szerz\u0151d\u00e9sbe adatokat kell \u00e1tvinni a leveg\u0151 h\u0151m\u00e9rs\u00e9klet\u00e9r\u0151l. Az adatokat szerezhetj\u00fck be az internetr\u0151l szoftveres oracle-en kereszt\u00fcl, vagy valamilyen IoT \u00e9rz\u00e9kel\u0151 \u00e1ltal hardveres oracle-on kereszt\u00fcl. *IoT \u2013 <noindex><a rel=\"nofollow\" href=\"https:\/\/trends.rbc.ru\/trends\/industry\/5db96f769a7947561444f118\">A dolgok internete.<\/a><\/noindex><\/i><\/li>\n<\/ul>\n<p><\/p>\n<ul>\n<li>bej\u00f6v\u0151 \u2013 a blokkl\u00e1ncb\u00f3l az okos szerz\u0151d\u00e9sbe;<\/li>\n<li>kimen\u0151 \u2013 az okos szerz\u0151d\u00e9sb\u0151l egy adott forr\u00e1sra;<\/li>\n<\/ul>\n<p>\nN\u00e9ha konszenzusos oracle-eket is haszn\u00e1lnak. T\u00f6bb oracle f\u00fcggetlen\u00fcl szerzi be az adatokat, majd egy bizonyos algoritmus alapj\u00e1n meghat\u00e1rozz\u00e1k az kimeneti adatokat. <\/p>\n<p><i>P\u00e9lda, hogy mire van sz\u00fcks\u00e9g: 3 oracle megszerzi a BTC\/USD \u00e1rfolyamot a Binance, BitMex \u00e9s Coinbase t\u0151zsd\u00e9kr\u0151l \u00e9s az \u00e1tlag\u00e9rt\u00e9ket tov\u00e1bb\u00edtja. Ezzel sim\u00edtj\u00e1k az apr\u00f3 elt\u00e9r\u00e9seket a t\u0151zsd\u00e9k k\u00f6z\u00f6tt.<\/i><\/p>\n<h2>Web3<\/h2>\n<p>\nAz oracle-ekr\u0151l \u00e9s megval\u00f3s\u00edt\u00e1saikr\u00f3l besz\u00e9lve nem lehet figyelmen k\u00edv\u00fcl hagyni a Web3-at, annak a koncepci\u00f3nak, amely\u00e9rt ezeket kital\u00e1lt\u00e1k. Eredetileg a Web3 a szemantikus web \u00f6tlete volt, ahol minden weboldal metadatokkal van jel\u00f6lve, hogy jav\u00edtsa az interakci\u00f3t a keres\u0151motorokkal. Azonban a modern Web3 \u00f6tlete egy dApp-okb\u00f3l \u00e1ll\u00f3 h\u00e1l\u00f3zat. A decentraliz\u00e1lt alkalmaz\u00e1soknak oracle-ekre van sz\u00fcks\u00e9g\u00fck.<\/p>\n<p><img decoding=\"async\" alt=\"Oracle-k a blokkl\u00e1ncok sz\u00e1m\u00e1ra \u00e9s egy kis bepillant\u00e1s a Web3-ba\" src=\"\/wp-content\/uploads\/2020\/08\/9a562a87082126bfe5a1f736a4ffd0ae.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLehet saj\u00e1t magad l\u00e9trehozni or\u00e1kulumot (\u00e9s bizonyos esetekben sz\u00fcks\u00e9ges is), de l\u00e9teznek gyakran haszn\u00e1lt or\u00e1kulumok (p\u00e9ld\u00e1ul v\u00e9letlen sz\u00e1mgener\u00e1tor), ez\u00e9rt j\u00f6vedelmez\u0151 az or\u00e1kulumprojektek haszn\u00e1lata. Jelenleg k\u00e9t f\u0151 projekt foglalkozik or\u00e1kulum fejleszt\u00e9s\u00e9vel \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/bandprotocol.com\/\">Band<\/a><\/noindex> \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/chain.link\/\">Chainlink<\/a><\/noindex>. <\/p>\n<h2>Band Protocol<\/h2>\n<p>\nA Band Protocol a dPoS konszenzusalgoritmuson m\u0171k\u00f6dik (<noindex><a rel=\"nofollow\" href=\"https:\/\/academy.binance.com\/ru\/blockchain\/delegated-proof-of-stake-explained\">mi ez?<\/a><\/noindex>) \u00e9s az adatforr\u00e1sok a hiteless\u00e9g\u00e9rt p\u00e9nz\u00fcgyi felel\u0151ss\u00e9get v\u00e1llalnak, nem csup\u00e1n a h\u00edrnev\u00fck alapj\u00e1n.<\/p>\n<p>A projekt \u00f6kosziszt\u00e9m\u00e1j\u00e1ban h\u00e1rom felhaszn\u00e1l\u00f3t\u00edpus l\u00e9tezik:<\/p>\n<ul>\n<li>Adatforr\u00e1sok, akik f\u00fcggetlen\u00fcl dolgoznak az adatok biztons\u00e1gos blokkl\u00e1ncra t\u00f6rt\u00e9n\u0151 tov\u00e1bb\u00edt\u00e1s\u00e1n. A token birtokosok szavaznak az adatforr\u00e1sokra, hogy ezek jogosults\u00e1got kapjanak adatok tov\u00e1bb\u00edt\u00e1s\u00e1ra a protokollban.<\/li>\n<li>dApp fejleszt\u0151k, akik kis d\u00edjat fizetnek az or\u00e1kulum haszn\u00e1lat\u00e1\u00e9rt.<\/li>\n<li>Band token birtokosok, akik szavaznak az adatforr\u00e1sokra. A szavaz\u00e1ssal a tokenjeikkel az adatforr\u00e1st seg\u00edtik, ami\u00e9rt dApp-t\u00f3l k\u00e9sz\u00fclt jutalmat kapnak.<\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"Oracle-k a blokkl\u00e1ncok sz\u00e1m\u00e1ra \u00e9s egy kis bepillant\u00e1s a Web3-ba\" src=\"\/wp-content\/uploads\/2020\/08\/f752795cbac32004e2a76ba7a95d5d0d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA Band \u00e1ltal \u201edo it yourself\u201d or\u00e1kulumok k\u00f6z\u00f6tt el\u00e9rhet\u0151k: rep\u00fcl\u0151g\u00e9pek felsz\u00e1ll\u00e1si\/lesz\u00e1ll\u00e1si ideje, id\u0151j\u00e1r\u00e1si t\u00e9rk\u00e9p, kriptovaluta \u00e1rfolyamok, arany- \u00e9s r\u00e9szv\u00e9ny\u00e1rfolyamok, bitcoin blokkinform\u00e1ci\u00f3k, \u00e1tlag\u00fczemanyag\u00e1r \u00e9s kriptopiacok forgalma, v\u00e9letlen sz\u00e1mgener\u00e1tor, Yahoo Finance, HTTP st\u00e1tuszk\u00f3d.<\/p>\n<p>Egy\u00e9bk\u00e9nt a Band m\u00f6g\u00f6tt a legend\u00e1s kock\u00e1zatit\u0151ke-alap tal\u00e1lhat\u00f3: <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sequoiacap.com\/\">Sequoia<\/a><\/noindex> \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/www.binance.com\/\">Binance<\/a><\/noindex>. <\/p>\n<h2>Chainlink<\/h2>\n<p>\n\u00d6sszess\u00e9g\u00e9ben a Chainlink \u00e9s a Band nagyon hasonl\u00f3 \u2014 mind az alap\u00e9rtelmezett megold\u00e1sokban, mind a fejleszt\u00e9si lehet\u0151s\u00e9gekben. A Chainlink egyszer\u0171bb m\u0171k\u00f6dtetni, mivel nincs szavaz\u00e1s az inform\u00e1ci\u00f3szolg\u00e1ltat\u00f3kra, m\u00edg a Band rugalmasabb, mert haszn\u00e1lja <noindex><a rel=\"nofollow\" href=\"https:\/\/cosmos.network\/sdk\">Cosmos SDK<\/a><\/noindex> \u00e9s 100%-ban ny\u00edlt forr\u00e1sk\u00f3d\u00fa. <\/p>\n<p>Jelenleg a Chainlink l\u00e9nyegesen n\u00e9pszer\u0171bb, a projekt partnerei k\u00f6z\u00f6tt megtal\u00e1lhat\u00f3 a Google Cloud, Binance, Matic Network \u00e9s Polkadot. A Chainlink f\u00f3kusz\u00e1l az or\u00e1kulumokra a <noindex><a rel=\"nofollow\" href=\"https:\/\/forklog.com\/chto-takoe-detsentralizovannye-finansy-defi\/\">DeFi<\/a><\/noindex>, amely jelenleg gyors \u00fctemben n\u00f6vekszik.<\/p>\n<p><img decoding=\"async\" alt=\"Oracle-k a blokkl\u00e1ncok sz\u00e1m\u00e1ra \u00e9s egy kis bepillant\u00e1s a Web3-ba\" src=\"\/wp-content\/uploads\/2020\/08\/ac663742aba41c9263c1453affc70e82.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Azok az er\u0151forr\u00e1sok, amelyekhez a Chainlink or\u00e1kulum seg\u00edts\u00e9g\u00e9vel juthatunk.<br \/>\n<\/i><\/p>\n<h3>Z\u00e1r\u00e1s<\/h3>\n<p>\nAz or\u00e1kulumok j\u00f3 \u00f6tletnek sz\u00e1m\u00edtanak az adatok k\u00f6zpontos\u00edtott forr\u00e1sokb\u00f3l a blokkl\u00e1ncba val\u00f3 tov\u00e1bb\u00edt\u00e1s\u00e1ra, \u00e9s figyelemmel k\u00eds\u00e9rem a fejl\u0151d\u00e9s\u00fcket. Azonban ha k\u00fcl\u00f6nb\u00f6z\u0151 blokkl\u00e1ncok k\u00f6z\u00f6tti interoperabilit\u00e1sr\u00f3l van sz\u00f3, m\u00e1s megold\u00e1sok is l\u00e9teznek, p\u00e9ld\u00e1ul a parachainok (m\u00e9g \u00edg\u00e9retesebb technol\u00f3gia, \u00e9s a k\u00f6vetkez\u0151 posztom t\u00e9m\u00e1ja). <\/p>\n<p>Akik m\u00e9lyebbre akarnak \u00e1sni: <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.bandchain.org\/\">Band Docs<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.chain.link\/docs\/getting-started\">Chainlink Docs<\/a><\/noindex>.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/513000\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0434\u0430\u043d\u043d\u044b\u0439 \u043c\u043e\u043c\u0435\u043d\u0442 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u044b \u0441\u0438\u043b\u044c\u043d\u043e \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b \u043e\u0442 \u0432\u043d\u0435\u0448\u043d\u0438\u0445 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u0432 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u2014 \u043a\u0430\u043a \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432, \u0442\u0430\u043a \u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u043e\u0432. \u0427\u0442\u043e\u0431\u044b \u0440\u0430\u0437\u043d\u044b\u0435 \u0446\u0435\u043f\u043e\u0447\u043a\u0438 \u0431\u043b\u043e\u043a\u043e\u0432 \u0431\u044b\u043b\u0438 \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u044b \u0438 \u043b\u0435\u0433\u043a\u043e \u043e\u0431\u043c\u0435\u043d\u0438\u0432\u0430\u043b\u0438\u0441\u044c \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u043c\u0435\u0436\u0434\u0443 \u0441\u043e\u0431\u043e\u0439 (\u0438 \u0441 \u0432\u043d\u0435\u0448\u043d\u0438\u043c\u0438 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438) \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043e\u0440\u0430\u043a\u0443\u043b\u043e\u0432. \u0427\u0442\u043e \u0442\u0430\u043a\u043e\u0435 \u043e\u0440\u0430\u043a\u0443\u043b\u044b \u041e\u0440\u0430\u043a\u0443\u043b \u2014 \u044d\u0442\u043e \u0441\u0438\u0441\u0442\u0435\u043c\u0430, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u0442 \u0438 \u0432\u0435\u0440\u0438\u0444\u0438\u0446\u0438\u0440\u0443\u0435\u0442 \u0441\u043e\u0431\u044b\u0442\u0438\u044f \u0438\u0437\u0432\u043d\u0435 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u0430 \u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0435\u0442 \u044d\u0442\u0438 \u0434\u0430\u043d\u043d\u044b\u0435 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