{"id":33870,"date":"2019-10-31T21:55:08","date_gmt":"2019-10-31T18:55:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/corda-open-source-blokchejn-dlya-biznesa\/"},"modified":"2019-10-31T21:55:08","modified_gmt":"2019-10-31T18:55:08","slug":"corda-open-source-blokchejn-dlya-biznesa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/corda-open-source-blokchejn-dlya-biznesa","title":{"rendered":"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/corda\/corda\">Corda<\/a><\/noindex> \u2014 egy elosztott f\u0151k\u00f6nyv a p\u00e9nz\u00fcgyi k\u00f6telezetts\u00e9gek t\u00e1rol\u00e1s\u00e1ra, kezel\u00e9s\u00e9re \u00e9s szinkroniz\u00e1l\u00e1s\u00e1ra k\u00fcl\u00f6nb\u00f6z\u0151 p\u00e9nz\u00fcgyi int\u00e9zm\u00e9nyek k\u00f6z\u00f6tt.<br \/>\n<img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/4dd7c4b5e177c7fdc59eef739a052bb3.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex>A Cord\u00e1nak el\u00e9g j\u00f3 dokument\u00e1ci\u00f3ja van vide\u00f3el\u0151ad\u00e1sokkal, amelyeket <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.corda.net\/index.html\">itt<\/a><\/noindex>. R\u00f6viden pr\u00f3b\u00e1lom \u00f6sszefoglalni, hogyan m\u0171k\u00f6dik a Corda a h\u00e1tt\u00e9rben.<\/p>\n<p>N\u00e9zz\u00fck meg a Corda f\u0151bb jellemz\u0151it \u00e9s egyedis\u00e9g\u00e9t m\u00e1s blokkl\u00e1ncokkal szemben:<\/p>\n<ul>\n<li>A Cord\u00e1nak nincs saj\u00e1t kriptovalut\u00e1ja. <\/li>\n<li>A Corda nem haszn\u00e1l b\u00e1ny\u00e1szati koncepci\u00f3t \u00e9s Proof-of-Work rendszert.<\/li>\n<li>Az adatok \u00e1tad\u00e1sa csak a tranzakci\u00f3 \/ szerz\u0151d\u00e9s r\u00e9sztvev\u0151i k\u00f6z\u00f6tt t\u00f6rt\u00e9nik. Itt nincs glob\u00e1lis ad\u00e1sv\u00e9tel az \u00f6sszes csom\u00f3pont sz\u00e1m\u00e1ra a h\u00e1l\u00f3zatban. <\/li>\n<li>Nincs k\u00f6zponti ir\u00e1ny\u00edt\u00f3, amely az \u00f6sszes tranzakci\u00f3t kezeln\u00e9.<\/li>\n<li>A Corda k\u00fcl\u00f6nf\u00e9le konszenzusmechanizmusokat t\u00e1mogat.<\/li>\n<li>A konszenzus az egyes meg\u00e1llapod\u00e1s\/szerz\u0151d\u00e9s szintj\u00e9n, \u00e9s nem az eg\u00e9sz rendszer szintj\u00e9n val\u00f3sul meg.<\/li>\n<li>A tranzakci\u00f3t csak a hozz\u00e1 kapcsol\u00f3d\u00f3 r\u00e9sztvev\u0151k er\u0151s\u00edtik meg.<\/li>\n<li>A Corda k\u00f6zvetlen kapcsolatot k\u00edn\u00e1l a form\u00e1lis emberi jogi nyelv \u00e9s a okos szerz\u0151d\u00e9sek k\u00f3dja k\u00f6z\u00f6tt.<\/li>\n<\/ul>\n<p><\/p>\n<h3>A f\u0151k\u00f6nyv<\/h3>\n<p>\nA f\u0151k\u00f6nyv fogalma a Cord\u00e1ban szubjekt\u00edv. Nincs egyetlen k\u00f6zponti adatb\u00e1zis. Ehelyett minden csom\u00f3pont fenntart egy k\u00fcl\u00f6n adatb\u00e1zist a neki ismert t\u00e9nyekr\u0151l.<\/p>\n<p>P\u00e9ld\u00e1ul k\u00e9pzelj\u00fcnk el egy 5 csom\u00f3pontb\u00f3l \u00e1ll\u00f3 h\u00e1l\u00f3zatot, ahol a k\u00f6r egy a csom\u00f3pont sz\u00e1m\u00e1ra ismert t\u00e9ny.<\/p>\n<p><img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/538ca02bcd0488dbcf626d4e9bc704f2.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAmint l\u00e1tjuk, Ed, Carl \u00e9s Demi tud a 3-as t\u00e9nyr\u0151l, m\u00edg Alice \u00e9s Bob m\u00e9g csak nem is sejtik. A Corda garant\u00e1lja, hogy a k\u00f6z\u00f6s t\u00e9nyeket minden csom\u00f3pont adatb\u00e1zis\u00e1ba r\u00f6gz\u00edtik, \u00e9s az adatok azonosak lesznek. <\/p>\n<h3>\u00c1llapotok<\/h3>\n<p>\nAz \u00e1llapot egy <i>v\u00e1ltoztathatatlan<\/i> objektum, amely egy t\u00e9nyt k\u00e9pvisel, amely egy vagy t\u00f6bb csom\u00f3pont sz\u00e1m\u00e1ra ismert egy adott id\u0151pontban.<\/p>\n<p>Az \u00e1llapotok tetsz\u0151leges adatokat t\u00e1rolhatnak, p\u00e9ld\u00e1ul r\u00e9szv\u00e9nyeket, k\u00f6tv\u00e9nyeket, hiteleket, azonos\u00edt\u00f3 inform\u00e1ci\u00f3kat.<\/p>\n<p>P\u00e9ld\u00e1ul a k\u00f6vetkez\u0151 \u00e1llapot egy IOU \u2014 egy megegyez\u00e9s arr\u00f3l, hogy Alice tartozik Bobnak X \u00f6sszeget:<\/p>\n<p><img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/19375664e05d42eb646dfbcab2c0638a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nA t\u00e9ny \u00e9letciklusa az id\u0151 m\u00fal\u00e1s\u00e1val \u00e1llapotok sorozatak\u00e9nt van \u00e1br\u00e1zolva. Amikor sz\u00fcks\u00e9ges a jelenlegi \u00e1llapot friss\u00edt\u00e9se, \u00faj \u00e1llapotot hozunk l\u00e9tre, \u00e9s a jelenlegit t\u00f6rt\u00e9nelminek (historic) jel\u00f6lj\u00fck.<\/p>\n<p><img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/f3ab2bd8a7c4cb6df40f003aa88cc0fd.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Tranzakci\u00f3k<\/h3>\n<p>\nA tranzakci\u00f3k a f\u0151k\u00f6nyv friss\u00edt\u00e9s\u00e9re vonatkoz\u00f3 aj\u00e1nlatok. Ezeket nem sug\u00e1rozz\u00e1k a f\u0151k\u00f6nyv minden r\u00e9sztvev\u0151j\u00e9nek, \u00e9s csak azok a h\u00e1l\u00f3zati tagok f\u00e9rhetnek hozz\u00e1, akiknek t\u00f6rv\u00e9nyes joga van megtekinteni \u00e9s kezelni azokat.<\/p>\n<p>A tranzakci\u00f3 akkor ker\u00fcl hozz\u00e1ad\u00e1sra a f\u0151k\u00f6nyvh\u00f6z, ha:<\/p>\n<ul>\n<li>szerz\u0151d\u00e9sileg \u00e9rv\u00e9nyes<\/li>\n<li>minden sz\u00fcks\u00e9ges r\u00e9sztvev\u0151 \u00e1ltal al\u00e1\u00edrt<\/li>\n<li>nem tartalmaz dupl\u00e1zott k\u00f6lt\u00e9seket (double-spends)<\/li>\n<\/ul>\n<p>\nA Corda UTXO (fel nem haszn\u00e1lt tranzakci\u00f3s kimenet) modellt haszn\u00e1l, amelyben a f\u0151k\u00f6nyv minden \u00e1llapota v\u00e1ltozatlan. <\/p>\n<p>A tranzakci\u00f3 l\u00e9trehoz\u00e1sakor a bel\u00e9p\u0151 a kor\u00e1bbi tranzakci\u00f3 kimeneti \u00e1llapot\u00e1t (hash \u00e9s index alapj\u00e1n) kapja.<\/p>\n<p><img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/f26706fc6ae514926ab7cc3d1e18aef7.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nA tranzakci\u00f3 \u00e9letciklusa:<\/p>\n<ul>\n<li>L\u00e9trehoz\u00e1s (Jelenleg a tranzakci\u00f3 csak egy javaslat a f\u0151k\u00f6nyv friss\u00edt\u00e9s\u00e9re) <\/li>\n<li>Al\u00e1\u00edr\u00e1sok gy\u0171jt\u00e9se (A tranzakci\u00f3 sz\u00fcks\u00e9ges r\u00e9sztvev\u0151i j\u00f3v\u00e1hagyj\u00e1k a friss\u00edt\u00e9si javaslatot az al\u00e1\u00edr\u00e1sok hozz\u00e1ad\u00e1s\u00e1val)<\/li>\n<li>A tranzakci\u00f3 elk\u00f6telez\u00e9se a f\u0151k\u00f6nyvben<\/li>\n<\/ul>\n<p>\nA tranzakci\u00f3 f\u0151k\u00f6nyvbe val\u00f3 beilleszt\u00e9se ut\u00e1n a bel\u00e9p\u0151 \u00e1llapotok t\u00f6rt\u00e9neti jel\u00f6l\u00e9st kapnak \u00e9s nem haszn\u00e1lhat\u00f3ak a j\u00f6v\u0151beli tranzakci\u00f3kban.<\/p>\n<p><img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/b2525d6861369163bedddcc4662d2f5b.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nA bel\u00e9p\u0151 \u00e9s kimeneti \u00e1llapotokon k\u00edv\u00fcl a tranzakci\u00f3 tartalmazhat:<\/p>\n<ul>\n<li>\u00datmutat\u00f3k (a tranzakci\u00f3 param\u00e9tere, amely megjel\u00f6li a tranzakci\u00f3 c\u00e9lj\u00e1t) <\/li>\n<li>Mell\u00e9kletek (\u00fcnnepi napt\u00e1r, valuta \u00e1tv\u00e1lt\u00f3) <\/li>\n<li>Id\u0151keretek (lej\u00e1rati id\u0151)<\/li>\n<li>Not\u00e1rius (Notary, a h\u00e1l\u00f3zat k\u00fcl\u00f6nleges tagjai, akik \u00e9rv\u00e9nyes\u00edtik a tranzakci\u00f3kat) <\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/776d3d738f344acc65182e5dc67d9673.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h3>Szerz\u0151d\u00e9sek<\/h3>\n<p>\nAmikor a tranzakci\u00f3 \u00e9rv\u00e9nyess\u00e9g\u00e9r\u0151l besz\u00e9l\u00fcnk, nemcsak a sz\u00fcks\u00e9ges al\u00e1\u00edr\u00e1sok megl\u00e9t\u00e9t \u00e9rtj\u00fck, hanem a szerz\u0151d\u00e9ssel val\u00f3 \u00e9rv\u00e9nyess\u00e9get is. Minden tranzakci\u00f3 egy olyan szerz\u0151d\u00e9shez van k\u00f6tve, amely azt elfogadja \u00e9s \u00e9rv\u00e9nyes\u00edti a bel\u00e9p\u0151 \u00e9s kimeneti \u00e1llapotokat. A tranzakci\u00f3 csak akkor tekinthet\u0151 \u00e9rv\u00e9nyesnek, ha minden \u00e1llapota \u00e9rv\u00e9nyes.<\/p>\n<p>A Corda szerz\u0151d\u00e9sei b\u00e1rmely JVM nyelven \u00edrhat\u00f3ak (p\u00e9ld\u00e1ul Java, Kotlin).<\/p>\n<pre><code class=\"kotlin\">class CommercialPaper : Contract {\n    override fun verify(tx: LedgerTransaction) {\n        TODO()\n    }\n}\n<\/code><\/pre>\n<p>\nSz\u00e1rmaznia kell a <i>Contract<\/i> oszt\u00e1lyb\u00f3l <i>verify<\/i>. \u00c9rv\u00e9nytelen tranzakci\u00f3 eset\u00e9n kiv\u00e9telt kell dobni.<\/p>\n<p>A tranzakci\u00f3k valid\u00e1l\u00e1s\u00e1nak determinisztikusnak kell lennie, azaz a szerz\u0151d\u00e9snek mindig el kell fogadnia vagy el kell utas\u00edtania a tranzakci\u00f3t. Ez\u00e9rt a tranzakci\u00f3 \u00e9rv\u00e9nyess\u00e9ge nem f\u00fcgghet az id\u0151t\u0151l, v\u00e9letlen sz\u00e1mokt\u00f3l, a h\u00e1l\u00f3zat csom\u00f3pontjainak f\u00e1jljait\u00f3l \u00e9s m\u00e1sokt\u00f3l.<\/p>\n<p>A Cord\u00e1ban a szerz\u0151d\u00e9sek egy \u00fagynevezett homokoz\u00f3ban hajt\u00f3dnak v\u00e9gre - egy enyh\u00e9n m\u00f3dos\u00edtott JVM, amely a szerz\u0151d\u00e9sek determinisztikus v\u00e9grehajt\u00e1s\u00e1t garant\u00e1lja. <\/p>\n<h3>Folyamatok<\/h3>\n<p>\nA h\u00e1l\u00f3zati csom\u00f3pontok k\u00f6z\u00f6tti kommunik\u00e1ci\u00f3 automatiz\u00e1l\u00e1s\u00e1ra folyamatokat vezettek be.<\/p>\n<p>A folyamat egy l\u00e9p\u00e9sek sorozata, amely megmondja a csom\u00f3pontnak, hogyan hajtson v\u00e9gre egy adott friss\u00edt\u00e9st a f\u0151k\u00f6nyvben, mikor kell al\u00e1\u00edrni \u00e9s valid\u00e1lni a tranzakci\u00f3t.<\/p>\n<p><img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/f23038fa73013d5cb2b3b980cd43a326.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00e9ha \u00f3r\u00e1kra, napokra van sz\u00fcks\u00e9g, am\u00edg a tranzakci\u00f3 al\u00e1\u00edr\u00e1sra ker\u00fclt minden f\u00e9l \u00e1ltal, \u00e9s beker\u00fcl a ledgerbe. Mi t\u00f6rt\u00e9nik, ha le\u00e1ll\u00edtunk egy csom\u00f3pontot, amely r\u00e9szt vesz a tranzakci\u00f3ban? A folyamatok ellen\u0151rz\u00e9si pontokkal rendelkeznek, amelyeken a folyamat \u00e1llapot\u00e1t a csom\u00f3pont adatb\u00e1zis\u00e1ba r\u00f6gz\u00edtik. Amikor a csom\u00f3pont vissza\u00e1ll a h\u00e1l\u00f3zatba, ott folytatja, ahol abbahagyta.<\/p>\n<h3>Konszenzus<\/h3>\n<p>\nAhhoz, hogy a tranzakci\u00f3 beker\u00fclj\u00f6n a ledgerbe, el kell \u00e9rnie a 2 konszenzust: a validit\u00e1s \u00e9s az egyedis\u00e9g tekintet\u00e9ben.<\/p>\n<p>A tranzakci\u00f3 validit\u00e1s\u00e1r\u00f3l csak a k\u00f6zvetlen\u00fcl \u00e9rintett felek d\u00f6ntenek.<\/p>\n<p>A not\u00e1rius csom\u00f3pontok ellen\u0151rzik a tranzakci\u00f3 egyedis\u00e9g\u00e9t, megakad\u00e1lyozva a kett\u0151s kiad\u00e1st.<\/p>\n<p>K\u00e9pzelj\u00fck el, hogy Bob-nak van 100 doll\u00e1rja, \u00e9s 80 doll\u00e1rt szeretne \u00e1tutalni Charlie-nak \u00e9s 70 doll\u00e1rt Dan-nek, ugyanazzal a bemeneti \u00e1llapottal dolgozva. <\/p>\n<p><img decoding=\"async\" alt=\"Corda \u2014 ny\u00edlt forr\u00e1sk\u00f3d\u00fa blokkl\u00e1nc az \u00fczleti \u00e9let sz\u00e1m\u00e1ra\" src=\"\/wp-content\/uploads\/2019\/05\/159a5b0f2a5c1e38f52d7739707efa8a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nEz a tr\u00fckk a Cord\u00e1val nem m\u0171k\u00f6dik. B\u00e1r a tranzakci\u00f3 \u00e1tmegy a validit\u00e1si ellen\u0151rz\u00e9sen, az egyedis\u00e9g ellen\u0151rz\u00e9se megbukik. <\/p>\n<h3>Z\u00e1r\u00e1s<\/h3>\n<p>\nA Corda platform, amelyet az R3 blockchain konzorcium fejlesztett ki, nem tiszta p\u00e9ld\u00e1ja a blockchain technol\u00f3gia haszn\u00e1lat\u00e1nak. A Corda egy meglehet\u0151sen specializ\u00e1lt eszk\u00f6z p\u00e9nz\u00fcgyi int\u00e9zm\u00e9nyek sz\u00e1m\u00e1ra.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/452258\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>Corda \u2014 \u044d\u0442\u043e \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u044b\u0439 Ledger \u0434\u043b\u044f \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f, \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0444\u0438\u043d\u0430\u043d\u0441\u043e\u0432\u044b\u0445 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432 \u043c\u0435\u0436\u0434\u0443 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u043c\u0438 \u0444\u0438\u043d\u0430\u043d\u0441\u043e\u0432\u044b\u043c\u0438 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u044f\u043c\u0438. \u0423 Corda \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0445\u043e\u0440\u043e\u0448\u0430\u044f \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044f \u0441 \u0432\u0438\u0434\u0435\u043e-\u043b\u0435\u043a\u0446\u0438\u044f\u043c\u0438, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0439\u0442\u0438 \u0437\u0434\u0435\u0441\u044c. \u042f \u043f\u043e\u0441\u0442\u0430\u0440\u0430\u044e\u0441\u044c \u043a\u0440\u0430\u0442\u043a\u043e \u043e\u043f\u0438\u0441\u0430\u0442\u044c \u043a\u0430\u043a \u0443\u0441\u0442\u0440\u043e\u0435\u043d Corda \u0432\u043d\u0443\u0442\u0440\u0438. \u0420\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438 Corda \u0438 \u0443\u043d\u0438\u043a\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0435\u0433\u043e \u0441\u0440\u0435\u0434\u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u043e\u0432: \u0423 Corda \u043d\u0435\u0442 \u0441\u043e\u0431\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0439 \u043a\u0440\u0438\u043f\u0442\u043e\u0432\u0430\u043b\u044e\u0442\u044b. Corda \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044e \u043c\u0430\u0439\u043d\u0438\u043d\u0433\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25536,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-33870","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Corda \u2014 \u044d\u0442\u043e \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u044b\u0439 Ledger \u0434\u043b\u044f \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f, \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438 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