{"id":52506,"date":"2019-11-10T00:00:00","date_gmt":"2019-11-09T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/kak-napisat-smart-kontrakt-na-python-v-seti-ontology-chast-1-blockchain-block-api"},"modified":"2020-02-18T14:00:15","modified_gmt":"2020-02-18T11:00:15","slug":"kak-napisat-smart-kontrakt-na-python-v-seti-ontology-chast-1-blockchain-block-api","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/administrirovanie\/kak-napisat-smart-kontrakt-na-python-v-seti-ontology-chast-1-blockchain-block-api","title":{"rendered":"Jak napisa\u0107 smart kontrakt w Pythonie w sieci Ontology. Cz\u0119\u015b\u0107 1: Blockchain i Block API","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Jak napisa\u0107 inteligentny kontrakt w Pythonie w sieci Ontology. Cz\u0119\u015b\u0107 1: Blockchain &amp; Block API\" src=\"\/wp-content\/uploads\/2019\/11\/4748f7bfd5e6c0b7a17ec511d22313df.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTo pierwsza cz\u0119\u015b\u0107 serii artyku\u0142\u00f3w edukacyjnych na temat tworzenia smart kontrakt\u00f3w w Pythonie w sieci blockchain Ontology za pomoc\u0105 narz\u0119dzia do tworzenia smart kontrakt\u00f3w. <noindex><a rel=\"nofollow\" href=\"https:\/\/smartx.ont.io\/\">SmartX<\/a><\/noindex>. <\/p>\n<p>W tym artykule rozpoczniemy zapoznawanie si\u0119 z API smart kontraktu Ontology. API smart kontraktu Ontology jest podzielone na 7 modu\u0142\u00f3w: <\/p>\n<ol>\n<li>Blockchain i Block API, <\/li>\n<li>Runtime API, <\/li>\n<li>Storage API, <\/li>\n<li>Native API, <\/li>\n<li>Upgrade API, <\/li>\n<li>Execution Engine API oraz <\/li>\n<li>Static i Dynamic Call API.<\/li>\n<\/ol>\n<p>\nBlockchain i Block API jest kluczow\u0105 cz\u0119\u015bci\u0105 systemu smart kontrakt\u00f3w Ontology. Blockchain API wspiera podstawowe operacje zwi\u0105zane z zapytaniami blockchain, takie jak pobieranie bie\u017c\u0105cej wysoko\u015bci bloku, podczas gdy Block API wspiera podstawowe operacje zapytaniowe zwi\u0105zane z blokami, takie jak zapytanie o liczb\u0119 transakcji dla danego bloku.<\/p>\n<p><b>Przejd\u017amy do rzeczy!<\/b><\/p>\n<p>Na pocz\u0105tek stw\u00f3rz nowy kontrakt w <noindex><a rel=\"nofollow\" href=\"https:\/\/smartx.ont.io\/#\">SmartX<\/a><\/noindex>, a nast\u0119pnie post\u0119puj zgodnie z poni\u017cszymi instrukcjami.<br \/>\n <noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>1. Jak u\u017cywa\u0107 Blockchain API<\/h3>\n<p>\nOdno\u015bniki do funkcji smart kontrakt\u00f3w s\u0105 identyczne z odno\u015bnikami w Pythonie. Mo\u017cesz wprowadza\u0107 odpowiednie funkcje w razie potrzeby. Na przyk\u0142ad, poni\u017csza instrukcja wprowadza GetHeight \u2014 funkcj\u0119 do uzyskiwania bie\u017c\u0105cej wysoko\u015bci bloku, oraz GetHeader \u2014 funkcj\u0119 do uzyskiwania nag\u0142\u00f3wka bloku.<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetHeight, GetHeader<\/code><\/pre>\n<p><\/p>\n<h4>GetHeight<\/h4>\n<p>\nGetHeight jest u\u017cywane do uzyskiwania ostatniego numeru porz\u0105dkowego bloku w blockchainie, jak pokazano w poni\u017cszym przyk\u0142adzie. W ostatnim przyk\u0142adzie dla u\u0142atwienia pominiemy funkcj\u0119 Main, ale mo\u017cesz j\u0105 doda\u0107, je\u015bli to konieczne.<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Runtime import Notify\nfrom ontology.interop.System.Blockchain import GetHeight\ndef Main(operation):\n    if operation == 'demo':\n        return demo()\n    return False\n\ndef demo():\n    height=GetHeight()\n    Notify(height) # print height\n    return height #return height after running the function<\/code><\/pre>\n<p><\/p>\n<h4>GetHeader<\/h4>\n<p>\nGetHeader jest u\u017cywane do uzyskiwania nag\u0142\u00f3wka bloku, a jego parametrem jest numer porz\u0105dkowy bloku w blockchainie. Przyk\u0142ad:<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Runtime import Notify\nfrom ontology.interop.System.Blockchain import GetHeader\ndef demo():\n    block_height=10\n    header=GetHeader(block_height) \n    Notify(header)\nreturn header<\/code><\/pre>\n<p><\/p>\n<h4>GetTransactionByHash<\/h4>\n<p>\nGetTransactionByHash jest u\u017cywane do uzyskiwania transakcji na podstawie hasha transakcji. Hash transakcji jest wysy\u0142any do <i>GetTransactionByHash <\/i>jako parametry w formacie bytearray. Kluczowym elementem tej funkcji jest konwersja hasha transakcji w formacie hex na hash transakcji w formacie bytearray. To wa\u017cny krok. W przeciwnym razie otrzymasz b\u0142\u0105d, kt\u00f3ry wskazuje, \u017ce nie ma bloku z takim hashem. We\u017amy hash transakcji w formacie hex, jako przyk\u0142ad, aby przekszta\u0142ci\u0107 go w format bytearray. Przyk\u0142ad wygl\u0105da nast\u0119puj\u0105co:<\/p>\n<pre><code class=\"python\">9f270aa3a4c13c46891ff0e1a2bdb3ea0525669d414994aadf2606734d0c89c1<\/code><\/pre>\n<p>\nNajpierw odwr\u00f3\u0107 hash transakcji:<\/p>\n<pre><code class=\"python\">c1890c4d730626dfaa9449419d662505eab3bda2e1f01f89463cc1a4a30a279<\/code><\/pre>\n<p>\nProgrami\u015bci mog\u0105 wykona\u0107 ten krok za pomoc\u0105 narz\u0119dzia konwersji Hex Number (little endian), kt\u00f3re jest dostarczane przez SmartX.<\/p>\n<p>Nast\u0119pnie przekszta\u0142\u0107 uzyskany wynik w format bytearray:<\/p>\n<pre><code class=\"python\">{0xc1,0x89,0x0c,0x4d,0x73,0x06,0x26,0xdf,0xaa,0x94,0x49,0x41,0x9d,0x66,0x25,0x05,0xea,0xb3,0xbd,0xa2,0xe1,0xf0,0x1f,0x89,0x46,0x3c,0xc1,0xa4,0xa3,0x0a,0x27,0x9f}<\/code><\/pre>\n<p>\nMo\u017cna to zrobi\u0107 za pomoc\u0105 narz\u0119dzia konwersji String Byte Array, kt\u00f3re jest dostarczane przez SmartX. Na koniec przekszta\u0142\u0107 uzyskany bytearray w podobny ci\u0105g:<\/p>\n<pre><code class=\"python\">xc1x89x0cx4dx73x06x26xdfxaax94x49x41x9dx66x25x05xeaxb3xbdxa2xe1xf0x1fx89x46x3cxc1xa4xa3x0ax27x9f<\/code><\/pre>\n<p>\nPoni\u017cej znajduje si\u0119 przyk\u0142ad funkcji GetTransactionByHash, kt\u00f3ra pobiera transakcj\u0119 za pomoc\u0105 hasha transakcji:<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetTransactionByHash\ndef demo():\n    # tx_hash=\"9f270aa3a4c13c46891ff0e1a2bdb3ea0525669d414994aadf2606734d0c89c1\"    \n    tx_hash=bytearray(b\"xc1x89x0cx4dx73x06x26xdfxaax94x49x41x9dx66x25x05xeaxb3xbdxa2xe1xf0x1fx89x46x3cxc1xa4xa3x0ax27x9f\")\n    tx=GetTransactionByHash(tx_hash)\n    return tx<\/code><\/pre>\n<h4>GetTransactionHeight<\/h4>\n<p>\nGetTransactionHeight u\u017cywana jest do uzyskania wysoko\u015bci transakcji za pomoc\u0105 hasha transakcji. We\u017amy hash z powy\u017cszego przyk\u0142adu:<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import  GetTransactionHeight\ndef demo():\n    #   tx_hash=\"9f270aa3a4c13c46891ff0e1a2bdb3ea0525669d414994aadf2606734d0c89c1\"    \n    tx_hash=bytearray(b\"xc1x89x0cx4dx73x06x26xdfxaax94x49x41x9dx66x25x05xeaxb3xbdxa2xe1xf0x1fx89x46x3cxc1xa4xa3x0ax27x9f\")\n    height=GetTransactionHeight(tx_hash)\n    return height<\/code><\/pre>\n<p><\/p>\n<h4>GetContract<\/h4>\n<p>\nProgrami\u015bci mog\u0105 u\u017cywa\u0107 funkcji GetContract, aby uzyska\u0107 kontrakt za pomoc\u0105 hasha kontraktu. Proces konwersji hasha kontraktu jest analogiczny do procesu konwersji hasha transakcji, kt\u00f3ry zosta\u0142 wcze\u015bniej wspomniany.<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetContract\ndef demo():\n    # contract_hash=\"d81a75a5ff9b95effa91239ff0bb3232219698fa\"    \n    contract_hash=bytearray(b\"xfax98x96x21x32x32xbbxf0x9fx23x91xfaxefx95x9bxffxa5x75x1axd8\")\n    contract=GetContract(contract_hash)\n    return contract<\/code><\/pre>\n<p><\/p>\n<h4>GetBlock<\/h4>\n<p>\nGetBlock u\u017cywana jest do uzyskania bloku. Istniej\u0105 dwa sposoby, aby uzyska\u0107 konkretny blok.<\/p>\n<p><b>1. Uzyska\u0107 blok po wysoko\u015bci bloku:<\/b><\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetBlock\ndef demo():\n    block=GetBlock(1408)\n    return block<\/code><\/pre>\n<p>\n<b>2. Uzyska\u0107 blok po hashu bloku:<\/b><\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetBlock\ndef demo():    \n    block_hash=bytearray(b'x16xe0xc5x40x82x79x77x30x44xeax66xc8xc4x5dx17xf7x17x73x92x33x6dx54xe3x48x46x0bxc3x2fxe2x15x03xe4')\n    block=GetBlock(block_hash)<\/code><\/pre>\n<p><\/p>\n<h3>2. Jak u\u017cywa\u0107 Block API<\/h3>\n<p>\nIstniej\u0105 trzy dost\u0119pne funkcje w Block API: <i>GetTransactions<\/i>, <i>GetTransactionCount<\/i>, i <i>GetTransactionByIndex<\/i>. Om\u00f3wimy je jedna po drugiej.<\/p>\n<h4>GetTransactionCount<\/h4>\n<p>\nGetTransactionCount u\u017cywana jest do uzyskania liczby transakcji dla danego bloku.<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetBlock\nfrom ontology.interop.System.Block import GetTransactionCount\ndef demo():\n    block=GetBlock(1408)\n    count=GetTransactionCount(block)\n    return count<\/code><\/pre>\n<p><\/p>\n<h3>GetTransactions<\/h3>\n<p>\nProgrami\u015bci mog\u0105 u\u017cywa\u0107 funkcji GetTransactions, aby uzyska\u0107 wszystkie transakcje w danym bloku.<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetBlock\nfrom ontology.interop.System.Block import GetTransactions \ndef demo():\n    block=GetBlock(1408)\n    txs=GetTransactions(block)\n    return txs<\/code><\/pre>\n<p><\/p>\n<h4>GetTransactionByIndex<\/h4>\n<p>\nGetTransactionByIndex u\u017cywa si\u0119 do uzyskania konkretnej transakcji w danym bloku.<\/p>\n<pre><code class=\"python\">from ontology.interop.System.Blockchain import GetBlock\nfrom ontology.interop.System.Block import GetTransactionByIndex\ndef demo():\n    block=GetBlock(1408)\n    tx=GetTransactionByIndex(block,0) # indeks zaczyna si\u0119 od 0.\n    return tx<\/code><\/pre>\n<p>\nPe\u0142ne instrukcje mo\u017cna znale\u017a\u0107 na naszym <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/punicasuite\/tutorials\/blob\/master\/smart-contracts-docs-cn\/course04_use_blockchain_api_in_smart_contract.md\">GitHub<\/a><\/noindex>.<\/p>\n<h3>Epilog<\/h3>\n<p>\nBlockchain &amp; Block API jest niezast\u0105pion\u0105 cz\u0119\u015bci\u0105 inteligentnych kontrakt\u00f3w, poniewa\u017c mo\u017cesz ich u\u017cy\u0107, aby za\u017c\u0105da\u0107 danych blockchaina i danych blok\u00f3w w inteligentnych kontraktach. W nast\u0119pnych artyku\u0142ach om\u00f3wimy, jak u\u017cywa\u0107 pozosta\u0142ych API i wyja\u015bnimy ich interakcje z blockchainem Ontology.<\/p>\n<blockquote><p>Artyku\u0142 zosta\u0142 przet\u0142umaczony przez redakcj\u0119 Hashrate&amp;Shares specjalnie dla OntologyRussia. <noindex><a rel=\"nofollow\" href=\"https:\/\/hashrate-and-shares.ru\/kak-razrabotat-smart-kontrakt-s-pomoshchyu-python-v-seti-ontology-chast-pervaya\">klik<\/a><\/noindex> <\/p><\/blockquote>\n<p> Jeste\u015b programist\u0105? Do\u0142\u0105cz do naszej spo\u0142eczno\u015bci technicznej na <noindex><a rel=\"nofollow\" href=\"https:\/\/discord.gg\/4TQujHj\">Discord<\/a><\/noindex>. Ponadto zajrzyj do <noindex><a rel=\"nofollow\" href=\"https:\/\/developer.ont.io\/\">Centrum dewelopera<\/a><\/noindex> na naszej stronie, tam mo\u017cesz znale\u017a\u0107 narz\u0119dzia dla deweloper\u00f3w, dokumentacj\u0119 i wiele wi\u0119cej.<\/p>\n<h4>Ontology<\/h4>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/ont.io\/\">strona internetowa Ontology<\/a><\/noindex> <\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/ontio\/\">GitHub<\/a><\/noindex> \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/discord.gg\/pQRHtbD\">Discord<\/a><\/noindex><\/li>\n<li>Telegram <noindex><a rel=\"nofollow\" href=\"https:\/\/t.me\/OntologyNetwork\">Angielski<\/a><\/noindex> \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/t.me\/OntologyAnnouncementsRu\">Polski<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/OntologyNetwork\">Twitter <\/a><\/noindex> \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/www.reddit.com\/r\/OntologyNetwork\/\">Reddit <\/a><\/noindex><\/li>\n<\/ul>\n<p>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/474966\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u042d\u0442\u043e \u043f\u0435\u0440\u0432\u0430\u044f \u0447\u0430\u0441\u0442\u044c \u0438\u0437 \u0441\u0435\u0440\u0438\u0438 \u043e\u0431\u0443\u0447\u0430\u044e\u0449\u0438\u0445 \u0441\u0442\u0430\u0442\u0435\u0439 \u043e \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0438 \u0441\u043c\u0430\u0440\u0442-\u043a\u043e\u043d\u0442\u0440\u0430\u043a\u0442\u043e\u0432 \u043d\u0430 Python \u0432 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d \u0441\u0435\u0442\u0438 Ontology \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u043c\u0430\u0440\u0442-\u043a\u043e\u043d\u0442\u0440\u0430\u043a\u0442\u043e\u0432 SmartX. \u0412 \u044d\u0442\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043c\u044b \u043d\u0430\u0447\u043d\u0451\u043c \u0437\u043d\u0430\u043a\u043e\u043c\u0441\u0442\u0432\u043e \u0441 API \u0441\u043c\u0430\u0440\u0442-\u043a\u043e\u043d\u0442\u0440\u0430\u043a\u0442\u0430 Ontology. API \u0441\u043c\u0430\u0440\u0442-\u043a\u043e\u043d\u0442\u0440\u0430\u043a\u0442\u0430 Ontology \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d \u043d\u0430 7 \u043c\u043e\u0434\u0443\u043b\u0435\u0439: Blockchain &amp; Block API, Runtime API, Storage API, Native API, Upgrade API, Execution Engine API \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":52507,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-52506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/pl\/blog\/administrirovanie\/kak-napisat-smart-kontrakt-na-python-v-seti-ontology-chast-1-blockchain-block-api\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"pl_PL\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041a\u0430\u043a \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0441\u043c\u0430\u0440\u0442-\u043a\u043e\u043d\u0442\u0440\u0430\u043a\u0442 \u043d\u0430 Python \u0432 \u0441\u0435\u0442\u0438 Ontology. \u0427\u0430\u0441\u0442\u044c 1: Blockchain &amp; Block API | ProHoster\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/pl\/blog\/administrirovanie\/kak-napisat-smart-kontrakt-na-python-v-seti-ontology-chast-1-blockchain-block-api\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2019-11-09T21:00:00+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2020-02-18T11:00:15+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Jak napisa\u0107 inteligentny kontrakt w Pythonie w sieci Ontology. 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