![\"\"](\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/shaking-hands-2965055_1280-1024x482.jpg\")
P\u011bkn\u00e9, co\u2026? A co to proboha znamen\u00e1? M\u016f\u017eeme to vysv\u011btlit takto: chytr\u00e1 smlouva nen\u00ed n\u011bco, \u010deho byste se mohli dotknout nebo dokonce po\u0159\u00e1dn\u011b vid\u011bt. V\u011bt\u0161inou uvid\u00edte pouze v\u00fdsledky, podobn\u011b jako u kabel\u016f uvnit\u0159 televize. Rozd\u00edl je v tom, \u017ee tentokr\u00e1t jsou tyto v\u00fdsledky zcela digit\u00e1ln\u00ed, proto\u017ee je zalo\u017eeno na digit\u00e1ln\u00ed dohod\u011b blockchain<\/a>, napsan\u00fd s v\u00fdpo\u010detn\u00edm k\u00f3dem k prosazen\u00ed p\u0159edchoz\u00edch podm\u00ednek dohodnut\u00fdch stranami. M\u016f\u017eete si to p\u0159edstavit jako automatickou smlouvu nebo z\u00e1ruku, kter\u00e1 obecn\u011b nepot\u0159ebuje pap\u00edr, pr\u00e1vn\u00edka, not\u00e1\u0159e ani prost\u0159edn\u00edky.<\/p>\n\n\n\n Kr\u00e1tk\u00e1 odpov\u011b\u010f je s digit\u00e1ln\u00edmi aplikacemi nebo n\u00e1stroji. Pokud nev\u00edte, jak ps\u00e1t k\u00f3d (jako v\u00fdvoj\u00e1\u0159i nebo po\u010d\u00edta\u010dov\u00ed in\u017een\u00fd\u0159i), nebudete za jejich vytv\u00e1\u0159en\u00ed zodpov\u011bdn\u00ed, tak\u017ee si ned\u011blejte starosti. Nechte tento \u00fakol na odborn\u00edc\u00edch. Chcete-li je pou\u017e\u00edvat, sta\u010d\u00ed si vybrat aplikaci zalo\u017eenou na inteligentn\u00edch smlouv\u00e1ch (obvykle decentralizovan\u00e9 aplikace) nebo platformu<\/strong> a j\u00edt s n\u00edm na va\u0161em za\u0159\u00edzen\u00ed (mobiln\u00ed nebo stoln\u00ed).<\/p>\n\n\n\n M\u016f\u017eeme si v\u0161ak trochu promluvit o vnit\u0159n\u00edm fungov\u00e1n\u00ed inteligentn\u00ed smlouvy. Nejprve se pod\u00edvejme na obr\u00e1zek, abychom v\u00e1m uk\u00e1zali, jak vypadaj\u00ed uvnit\u0159. Spoiler: je to trochu nudn\u00e9. Je to jen hromada k\u00f3du.<\/p>\n\n\n\n M\u016f\u017eeme tak\u00e9 zkontrolovat jejich data na pr\u016fzkumn\u00edk blockchainu<\/a> (p\u0159\u00edstupn\u00e1 webov\u00e1 str\u00e1nka), pokud je samoz\u0159ejm\u011b ve\u0159ejn\u00e1. Banky vyv\u00edjej\u00ed sv\u00e9 vlastn\u00ed aplikace s chytr\u00fdmi smlouvami, tak\u017ee ty nejsou ve\u0159ejn\u00e9. M\u016f\u017eeme ale zkontrolovat nap\u0159\u00edklad pr\u016fm\u011brnou smlouvu na Ethereum.<\/p>\n\n\n\n Zjist\u00edme zde d\u016fle\u017eitou v\u011bc t\u00fdkaj\u00edc\u00ed se chytr\u00fdch smluv. Krom\u011b k\u00f3du jsou vyrobeny z transakc\u00ed a pen\u011b\u017en\u00edho z\u016fstatku. <\/strong>To v\u0161ak neznamen\u00e1, \u017ee jedin\u00e9 a pouze jejich pou\u017eit\u00ed mus\u00ed b\u00fdt finan\u010dn\u00ed: transakce mohou tak\u00e9 p\u0159edstavovat pouze informace. Pokud jde o z\u016fstatek, pravdou je, \u017ee decentralizovan\u00e9 chytr\u00e9 smlouvy vy\u017eaduj\u00ed ur\u010dit\u00e9 poplatky za fungov\u00e1n\u00ed (obvykle ve form\u011b kryptom\u011bn), ur\u010den\u00e9 t\u011b\u017ea\u0159i nebo valid\u00e1to\u0159i<\/a> blockchainu.<\/p>\n\n\n\n Nap\u0159\u00edklad uvnit\u0159 Ethereum je smlouva spravedliv\u00e1 jin\u00fd druh adresy<\/a> (pen\u011b\u017eenka\/\u00fa\u010det), se z\u016fstatkem a transakcemi. Ale je to druh kolektivn\u00ed adresy, navr\u017een\u00fd tak, aby fungoval jako most mezi dv\u011bma nebo v\u00edce stranami, s p\u0159ednastaven\u00fdmi podm\u00ednkami. Tuto adresu proto nekontroluje pouze jeden u\u017eivatel, ale jej\u00ed vlastn\u00ed p\u0159edem dohodnut\u00e9 podm\u00ednky vynucen\u00e9 celou s\u00edt\u00ed Ethereum.<\/p>\n\n\n\n Spou\u0161t\u011b\u010dem, aby tato adresa n\u011bco ud\u011blala (nap\u0159\u00edklad automatick\u00e9 p\u0159ev\u00e1d\u011bn\u00ed pen\u011bz), je ud\u00e1lost, kterou strany o\u010dek\u00e1vaj\u00ed<\/strong>. M\u016f\u017ee to b\u00fdt prodej, datum platby, z\u00e1znam n\u011b\u010deho, nov\u00fd produkt online, zm\u011bnu ceny<\/a>, anketa nebo dokonce sportovn\u00ed v\u00fdsledky.<\/p>\n\n\n\n Smlouva sah\u00e1 po informac\u00edch, kter\u00e9 o n\u00ed poskytly z\u00fa\u010dastn\u011bn\u00e9 strany nebo \u201eor\u00e1kulum\u201c (software, kter\u00fd konzultuje extern\u00ed zdroje), a jedn\u00e1 v d\u016fsledku toho podle sv\u00fdch p\u0159ednastaven\u00fdch podm\u00ednek.<\/p>\n\n\n\n Abych to shrnul, toto je postup:<\/strong><\/p>\n\n\n\n 1. Strany vyjedn\u00e1vaj\u00ed podm\u00ednky smlouvy (nebo je spole\u010dnost\/developer zve\u0159ejn\u00ed pro ka\u017ed\u00e9ho, kdo se chce p\u0159ipojit). Samoz\u0159ejm\u011b pot\u0159ebujeme klasick\u00fd p\u0159\u00edklad s Alic\u00ed a Bobem. \u0158ekn\u011bme, \u017ee Alice bude s\u00e1zet $500 s Bobem o Cena Bitcoin<\/a> na dal\u0161\u00ed v\u00edkend. Bob si mysl\u00ed, \u017ee to bude a\u017e X dolar\u016f, zat\u00edmco Alice si mysl\u00ed, \u017ee to bude dole X dolar\u016f.<\/p>\n\n\n\n Rozhodnou se tedy vybudovat chytrou smlouvu (p\u0159ita\u017elivou pro v\u00fdvoj\u00e1\u0159e nebo platformu jako slu\u017ebu) a nastavit si podm\u00ednky. Prost\u0159edky ($500) budou ulo\u017eeny v kryptom\u011bn\u011b ke smlouv\u011b,<\/strong> a pokud cena Bitcoin stoupne X p\u0159\u00ed\u0161t\u00ed v\u00edkend, smlouva automaticky p\u0159evede prost\u0159edky Bobovi. Pokud cena Bitcoin<\/a> kles\u00e1 X, prost\u0159edky p\u016fjdou na Alicinu adresu. A to je v\u0161e.<\/p>\n\n\n\n Nyn\u00ed dal\u0161\u00ed situace, tentokr\u00e1t zahrnuj\u00edc\u00ed n\u011bjak\u00fd internet v\u011bc\u00ed (IoT). Alice chce pronajmout sv\u016fj d\u016fm Bobovi a ona m\u00e1 tu v\u00fdhodu, \u017ee m\u00e1 nainstalovan\u00fd chytr\u00fd z\u00e1mek, ovl\u00e1dan\u00fd digit\u00e1ln\u011b pro otev\u00edr\u00e1n\u00ed a zav\u00edr\u00e1n\u00ed dve\u0159\u00ed. Buduj\u00ed tedy chytrou smlouvu a stanovuj\u00ed tyto podm\u00ednky: Bob zaplat\u00ed X dolar\u016f v kryptom\u011bn\u011b m\u011bs\u00ed\u010dn\u011b.<\/p>\n\n\n\n Pokud tak neu\u010din\u00ed po dobu dvou m\u011bs\u00edc\u016f, smlouva na\u0159\u00edd\u00ed chytr\u00fd z\u00e1mek, aby dve\u0159e (a p\u0159\u00edstup do domu) z\u016fstaly zav\u0159en\u00e9.<\/strong> T\u00edmto zp\u016fsobem Alice uji\u0161\u0165uje, \u017ee \u0159\u00e1dn\u011b obdr\u017eela dohodnutou figuru, a Bob nemus\u00ed pro Alice shroma\u017e\u010fovat \u017e\u00e1dn\u00e9 dal\u0161\u00ed dokumenty ani n\u00e1le\u017eitosti.<\/p>\n\n\n\n A nakonec je to typ smlouvy. Mez\u00ed je p\u0159edstavivost.<\/p>\n\n\n\n Ji\u017e existuj\u00ed stovky aplikac\u00ed zalo\u017een\u00fdch na inteligentn\u00edch smlouv\u00e1ch se spoustou kategori\u00ed a funkc\u00ed. Burzy, hazardn\u00ed hry, hry, investice, nemovitosti, zdravotnictv\u00ed, tr\u017ei\u0161t\u011b, pr\u016fzkumy ve\u0159ejn\u00e9ho m\u00edn\u011bn\u00ed ... to v\u0161e funguje s chytr\u00fdmi smlouvami.<\/p>\n\n\n\n Mo\u017en\u00e1 v\u00e1m n\u011bkte\u0159\u00ed z t\u011bchto Dapps (kte\u0159\u00ed sami o sob\u011b nejsou chytr\u00fdmi smlouvami, ale pracuj\u00ed s nimi) mohou zazvonit. CryptoKitties (sb\u011bratelsk\u00e9 p\u0159edm\u011bty), Uniswap (v\u00fdm\u011bna), Aragon (spr\u00e1va), District0x (tr\u017ei\u0161t\u011b a komunity), Augur (predik\u010dn\u00ed trh), Synthetix (pro syntetick\u00e1 aktiva), Axie Infinity (hry), Grid+ (energie) a Actifit (zdrav\u00ed) jsou pouze p\u0159\u00edklady. Podle Stav Dapps<\/a>, je jich p\u0159es 2 500.<\/strong><\/p>\n\n\n\n A v\u00edte, co je\u0161t\u011b funguje s t\u011bmito smlouvami? Cel\u00fd Decentralizovan\u00e9 finance (DeFi)<\/a> ekosyst\u00e9m, v dne\u0161n\u00ed dob\u011b boom. M\u016f\u017eeme tam naj\u00edt spoustu investi\u010dn\u00edch n\u00e1stroj\u016f (nap\u0159 v\u00fdnosov\u00e9 zem\u011bd\u011blstv\u00ed<\/a>(v\u011bt\u0161inou), p\u016fj\u010dky, poji\u0161t\u011bn\u00ed, spo\u0159en\u00ed a dal\u0161\u00ed. Platformy jako Yearn Finance, Compound, UMA, Maker, Curve a Nakl\u00e1d\u00e1n\u00ed financ\u00ed<\/a> pat\u0159\u00ed do t\u00e9to kategorie.<\/p>\n\n\n\n Krom\u011b toho banky a spole\u010dnosti jako BBVA, Bankia, Sabadell, CaixaBank, IBM, Microsoft, Google, Ernst & Young, S7 Airlines, BitGive<\/a>, Money on Chain a OneSmart City bu\u010f testuj\u00ed chytr\u00e9 smlouvy za \u00fa\u010delem vylep\u0161en\u00ed sv\u00fdch slu\u017eeb, nebo je ji\u017e pou\u017e\u00edvaj\u00ed v r\u016fzn\u00fdch aplikac\u00edch. Jak tedy vid\u00edte, t\u011bchto smluv jsme ji\u017e pln\u00ed.<\/p>\n\n\n\n Chcete obchodovat BTC, ETH a dal\u0161\u00ed tokeny? M\u016f\u017ee\u0161 to ud\u011blat<\/em>\u00a0bezpe\u010dn\u011b\u00a0na Alfacash<\/a>! A nezapome\u0148te, \u017ee mluv\u00edme o tomto a mnoha dal\u0161\u00edch v\u011bcech na na\u0161ich soci\u00e1ln\u00edch m\u00e9di\u00edch. Chytr\u00e9 smlouvy zn\u00ed jako o\u0161emetn\u00fd term\u00edn, zvl\u00e1\u0161t\u011b kdy\u017e se to sna\u017e\u00ed vysv\u011btlit. Pod\u00edvejme se na snadn\u00fd popis a pou\u017eit\u00ed.<\/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\/cs\/author\/isabel\/"},"yoast_head":"\nTak\u017ee ... jak chytr\u00e9 smlouvy funguj\u00ed pro va\u0161eho pr\u016fm\u011brn\u00e9ho mu\u017ee?<\/strong><\/h2>\n\n\n\n
![\"\"](\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Smart-contract-example.-Source-Ethereum.org_-1024x331.jpg\")
![\"\"](\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/Example-of-public-data-in-a-smart-contract.-Source-Etherscan-1024x450.jpg\")
Postup je jako\u2026<\/strong><\/h2>\n\n\n\n
![\"\"](\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/marathon-2346948_1280-1024x575.jpg\")
2. V\u00fdvoj\u00e1\u0159 vytvo\u0159\u00ed protokol uvnit\u0159 vybran\u00e9ho blockchainu (Ethereum<\/a>(EOS, Tron, Cardano, RSK atd.) Pomoc\u00ed dohodnut\u00fdch podm\u00ednek.
3. Smlouva a jej\u00ed podm\u00ednky jsou zastoupeny na adrese takov\u00e9ho blockchainu.
4. Ud\u00e1lost se stane.
5. Smlouva prov\u00e1d\u00ed transakce podle v\u00fdsledku uveden\u00e9 ud\u00e1losti.<\/p>\n\n\n\n
Alice a Bob pou\u017e\u00edvali chytr\u00e9 smlouvy<\/strong><\/h2>\n\n\n\n![\"Bitcoin-15000-bull-run\"](\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/11\/bitcoin-2643188_1280-1024x682.jpg\")
<\/figure><\/div>\n\n\n\nN\u011bkter\u00e1 obl\u00edben\u00e1 pou\u017eit\u00ed pro chytr\u00e9 smlouvy<\/strong><\/h2>\n\n\n\n
![\"\"](\"https:\/\/alfacash.blog\/wp-content\/uploads\/2020\/12\/touch-screen-1023966_1280-1024x730.jpg\")
\n\n\n\n
<\/em>Cvrlik\u00e1n\u00ed<\/a>\u00a0*\u00a0Telegram<\/a>\u00a0*\u00a0Instagram<\/a> * Youtube<\/a>\u00a0*Facebook<\/a>\u00a0\u00a0*\u00a0Vkontakte<\/a><\/p>","protected":false},"excerpt":{"rendered":"