{"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\/sk\/blog\/administrirovanie\/ob-orakulah-dlya-blokchejnov-i-nemnogo-o-web3","title":{"rendered":"O orakoch pre blockchainy a trochu o Web3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V s\u00fa\u010dasnosti s\u00fa blockchainy silne izolovan\u00e9 od vonkaj\u0161\u00edch zdrojov inform\u00e1ci\u00ed \u2014 \u010di u\u017e z centralizovan\u00fdch zdrojov alebo in\u00fdch blockchainov. Aby boli r\u00f4zne blokov\u00e9 re\u0165azce kompatibiln\u00e9 a mohli si \u013eahko vymie\u0148a\u0165 d\u00e1ta medzi sebou (a s vonkaj\u0161\u00edmi zdrojmi), m\u00f4\u017eu sa pou\u017ei\u0165 oracle. <\/p>\n<p><img decoding=\"async\" alt=\"O orakoch pre blockchainy a trochu o Web3\" 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>\u010co s\u00fa oracle?<\/h3>\n<p>\nOracle je syst\u00e9m, ktor\u00fd prij\u00edma a overuje udalosti z vonkaj\u0161ieho sveta a pren\u00e1\u0161a tieto d\u00e1ta do blockchainu pre pou\u017e\u00edvanie v smart kontraktoch (alebo naopak). Oracle s\u00fa kriticky d\u00f4le\u017eit\u00e9 pre smart kontrakty, preto\u017ee smart kontrakty s\u00fa striktne deterministick\u00e9. Inform\u00e1cie musia prich\u00e1dza\u0165 do smart kontraktu cez ur\u010dit\u00e9 kan\u00e1ly, ktor\u00e9 s\u00fa schopn\u00e9 potvrdi\u0165 ich pravos\u0165. <\/p>\n<p>Existuje nieko\u013eko typov oracle, ktor\u00e9 zabezpe\u010duj\u00fa r\u00f4zne typy komunik\u00e1cie:<\/p>\n<ul>\n<li>softv\u00e9rov\u00e9 \u2014 z\u00edskavaj\u00fa d\u00e1ta z internetu alebo z in\u00fdch blockchainov;<\/li>\n<li>hardv\u00e9rov\u00e9 \u2014 z\u00edskavaj\u00fa d\u00e1ta z r\u00f4znych senzorov (<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/RFID\">RFID<\/a><\/noindex> zna\u010dky, inteligentn\u00e1 dom\u00e1cnos\u0165, osobne mi hne\u010f napad\u00e1 uplatnenie v logistike a IoT);\n<p><i>Pr\u00edklad: do smart kontraktu je potrebn\u00e9 prenies\u0165 \u00fadaje o teplote vzduchu. D\u00e1ta m\u00f4\u017eeme z\u00edska\u0165 z internetu cez softv\u00e9rov\u00e9 oracle, alebo z IoT senzora cez hardv\u00e9rov\u00e9 oracle. *IoT \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/trends.rbc.ru\/trends\/industry\/5db96f769a7947561444f118\">Internet vec\u00ed.<\/a><\/noindex><\/i><\/li>\n<\/ul>\n<p><\/p>\n<ul>\n<li>prich\u00e1dzaj\u00face \u2014 zvonka blockchainu do smart kontraktu;<\/li>\n<li>odch\u00e1dzaj\u00face \u2014 zo smart kontraktu na nejak\u00fd zdroj;<\/li>\n<\/ul>\n<p>\nNiekedy sa pou\u017e\u00edvaj\u00fa konsenzu\u00e1lne oracle. Nieko\u013eko oracle nez\u00e1visle z\u00edskava d\u00e1ta a potom pod\u013ea nejak\u00e9ho algoritmu ur\u010duj\u00fa v\u00fdstupn\u00e9 d\u00e1ta. <\/p>\n<p><i>Pr\u00edklad, na \u010do je to potrebn\u00e9: 3 oracle z\u00edskavaj\u00fa kurz BTC\/USD z Binance, BitMex a Coinbase, a na v\u00fdstupe pren\u00e1\u0161aj\u00fa priemern\u00fa hodnotu. Tak sa vyhladzuj\u00fa nev\u00fdznamn\u00e9 rozdiely medzi burzami.<\/i><\/p>\n<h2>Web3<\/h2>\n<p>\nKe\u010f hovor\u00edme o oracle a ich realiz\u00e1ci\u00e1ch, nem\u00f4\u017eeme prehliadnu\u0165 Web3, koncept, kv\u00f4li ktor\u00e9mu boli vytvoren\u00e9. P\u00f4vodne bol Web3 my\u0161lienkou s\u00e9mantick\u00e9ho webu, kde je ka\u017ed\u00e1 str\u00e1nka ozna\u010den\u00e1 metad\u00e1tami pre zlep\u0161enie interakcie s vyh\u013ead\u00e1vac\u00edmi syst\u00e9mami. Modern\u00e1 my\u0161lienka Web3 v\u0161ak je sie\u0165, pozost\u00e1vaj\u00faca z dApps. A decentralizovan\u00fdm aplik\u00e1ci\u00e1m s\u00fa potrebn\u00e9 oracle.<\/p>\n<p><img decoding=\"async\" alt=\"O orakoch pre blockchainy a trochu o Web3\" src=\"\/wp-content\/uploads\/2020\/08\/9a562a87082126bfe5a1f736a4ffd0ae.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nVytvorenie or\u00e1kula je mo\u017en\u00e9 (a v niektor\u00fdch pr\u00edpadoch potrebn\u00e9), ale existuj\u00fa aj niektor\u00e9 \u010dasto pou\u017e\u00edvan\u00e9 or\u00e1kula (napr\u00edklad gener\u00e1tor n\u00e1hodn\u00fdch \u010d\u00edsel), preto je rentabiln\u00e9 vyu\u017e\u00edva\u0165 or\u00e1kulov\u00e9 projekty. Dva hlavn\u00e9 (v s\u00fa\u010dasnosti) projekty, ktor\u00e9 vyv\u00edjaj\u00fa or\u00e1kula \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/bandprotocol.com\/\">Kapela<\/a><\/noindex> a <noindex><a rel=\"nofollow\" href=\"https:\/\/chain.link\/\">Chainlink<\/a><\/noindex>. <\/p>\n<h2>Band Protocol<\/h2>\n<p>\nBand Protocol funguje na algoritme konsenzu dPoS (<noindex><a rel=\"nofollow\" href=\"https:\/\/academy.binance.com\/ru\/blockchain\/delegated-proof-of-stake-explained\">\u010do to je?<\/a><\/noindex>) a poskytovatelia d\u00e1t s\u00fa zodpovedn\u00ed za autenticitu svojimi peniazmi, nie len reput\u00e1ciou.<\/p>\n<p>V ekosyst\u00e9me projektu existuj\u00fa tri typy pou\u017e\u00edvate\u013eov:<\/p>\n<ul>\n<li>Poskytovatelia d\u00e1t, ktor\u00ed nez\u00e1visle pracuj\u00fa na bezpe\u010dnom prenose d\u00e1t z vonkaj\u0161ieho sveta do blockchainu. Dr\u017eitelia tokenov st\u00e1vkuj\u00fa na poskytovate\u013eov d\u00e1t, aby im dali pr\u00e1vo pren\u00e1\u0161a\u0165 d\u00e1ta do protokolu.<\/li>\n<li>V\u00fdvoj\u00e1ri dApp, ktor\u00ed platia mal\u00e9 poplatky za pou\u017e\u00edvanie or\u00e1kula.<\/li>\n<li>Dr\u017eitelia tokenov Band, ktor\u00ed hlasuj\u00fa za poskytovate\u013eov d\u00e1t. Hlasovan\u00edm svojimi tokenmi za poskytovate\u013ea z\u00edskavaj\u00fa odmenu z pe\u0148az\u00ed vypl\u00e1can\u00fdch dApps.<\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"O orakoch pre blockchainy a trochu o Web3\" src=\"\/wp-content\/uploads\/2020\/08\/f752795cbac32004e2a76ba7a95d5d0d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMedzi or\u00e1kulami, ktor\u00e9 Band pon\u00faka \u201ez krabice\u201c, s\u00fa: \u010dasy vzletov\/letas\u00ed \u00fatokov, mapa po\u010dasia, kurzy kryptomien, ceny zlata a akci\u00ed, inform\u00e1cie o blokoch bitcoinu, priemern\u00e1 cena plynu, objemy na krypto burz\u00e1ch, gener\u00e1tor n\u00e1hodn\u00fdch \u010d\u00edsel, Yahoo Finance, HTTP Status Code.<\/p>\n<p>Mimochodom, medzi investormi Band je legend\u00e1rny investi\u010dn\u00fd fond <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sequoiacap.com\/\">Sequoia<\/a><\/noindex> a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.binance.com\/\">Binance<\/a><\/noindex>. <\/p>\n<h2>Chainlink<\/h2>\n<p>\nCelkovo, Chainlink a Band s\u00fa ve\u013emi podobn\u00e9 \u2014 ako v predvolen\u00fdch rie\u0161eniach, tak v mo\u017enostiach v\u00fdvoja. Chainlink je jednoduch\u0161\u00ed na pou\u017e\u00edvanie, nem\u00e1 hlasovanie za poskytovate\u013eov inform\u00e1ci\u00ed, zatia\u013e \u010do Band je flexibilnej\u0161\u00ed, preto\u017ee vyu\u017e\u00edva <noindex><a rel=\"nofollow\" href=\"https:\/\/cosmos.network\/sdk\">Cosmos SDK<\/a><\/noindex> a je 100% open source. <\/p>\n<p>V s\u00fa\u010dasnosti je Chainlink ove\u013ea popul\u00e1rnej\u0161\u00ed, v zozname partnerov projektu s\u00fa Google Cloud, Binance, Matic Network a Polkadot. Chainlink sa taktie\u017e zameral na or\u00e1kula pre sf\u00e9ru <noindex><a rel=\"nofollow\" href=\"https:\/\/forklog.com\/chto-takoe-detsentralizovannye-finansy-defi\/\">DeFi<\/a><\/noindex>, ktor\u00e1 v s\u00fa\u010dasnosti r\u00fdchlo rastie.<\/p>\n<p><img decoding=\"async\" alt=\"O orakoch pre blockchainy a trochu o Web3\" src=\"\/wp-content\/uploads\/2020\/08\/ac663742aba41c9263c1453affc70e82.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Zdroje, ktor\u00fdch d\u00e1ta je mo\u017en\u00e9 z\u00edska\u0165 prostredn\u00edctvom or\u00e1kula od Chainlink.<br \/>\n<\/i><\/p>\n<h3>Z\u00e1ver<\/h3>\n<p>\nOr\u00e1kula s\u00fa dobr\u00fd n\u00e1pad na z\u00edskavanie d\u00e1t z centralizovan\u00fdch zdrojov do blockchainu, a ja budem pozorne sledova\u0165 ich v\u00fdvoj. Av\u0161ak, ak sa hovor\u00ed o vz\u00e1jomnej kompatibilite r\u00f4znych blockchainov, existuj\u00fa aj in\u00e9 rie\u0161enia, vr\u00e1tane parachainov (e\u0161te s\u013eubnej\u0161ia technol\u00f3gia a t\u00e9ma m\u00f4jho \u010fal\u0161ieho pr\u00edspevku). <\/p>\n<p>Pre t\u00fdch, ktor\u00ed chc\u00fa \u00eds\u0165 hlb\u0161ie: <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 \/>Zdroj: <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 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":90632,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-90631","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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 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