{"id":101704,"date":"2025-03-16T00:14:40","date_gmt":"2025-03-15T20:44:40","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/"},"modified":"2025-03-16T00:14:40","modified_gmt":"2025-03-15T20:44:40","slug":"fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/","title":{"rendered":"Fronted for Web3 Dapp: \u0631\u0648\u0634\u0647\u0627\u06cc \u062e\u0648\u0628"},"content":{"rendered":"<div data-article-id=\"2335233\" id=\"article-body\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter-rtl ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#1_%D8%A7%D8%AA%D8%AD%D8%A7%D8%AF%DB%8C%D9%87_%D9%87%D8%A7%DB%8C_%D8%AA%D8%A8%D8%B9%DB%8C%D8%B6_%D8%A2%D9%85%DB%8C%D8%B2_%D8%A7%DB%8C%D9%85%D9%86%DB%8C_%D9%86%D9%88%D8%B9\" >1. \u0627\u062a\u062d\u0627\u062f\u06cc\u0647 \u0647\u0627\u06cc \u062a\u0628\u0639\u06cc\u0636 \u0622\u0645\u06cc\u0632 \u0627\u06cc\u0645\u0646\u06cc \u0646\u0648\u0639<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#2_%D8%A7%D9%84%DA%AF%D9%88%DB%8C_%D9%81%D8%B1%D9%85%D8%A7%D9%86-%D8%A7%DB%8C%D8%A7%D9%84%D8%AA%DB%8C\" >2. \u0627\u0644\u06af\u0648\u06cc \u0641\u0631\u0645\u0627\u0646-\u0627\u06cc\u0627\u0644\u062a\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#3_%D8%AF%D8%B3%D8%AA%DA%AF%D8%A7%D9%87_%D9%87%D8%A7%DB%8C_%D8%AD%D8%A7%D9%84%D8%AA_%D9%85%D8%AD%D8%AF%D9%88%D8%AF\" >3. \u062f\u0633\u062a\u06af\u0627\u0647 \u0647\u0627\u06cc \u062d\u0627\u0644\u062a \u0645\u062d\u062f\u0648\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#4_%D8%A8%D8%B1%D9%86%D8%A7%D9%85%D9%87_%D9%86%D9%88%DB%8C%D8%B3%DB%8C_%D9%88%D8%A7%DA%A9%D9%86%D8%B4%DB%8C_%D1%81_rxjs\" >4. \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0648\u0627\u06a9\u0646\u0634\u06cc \u0441 rxjs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#5_%D8%AE%D8%B7%D8%A7_%D8%A8%D9%87_%D8%B9%D9%86%D9%88%D8%A7%D9%86_%D8%AF%D8%A7%D8%AF%D9%87_%D8%8C_%D9%86%D9%87_%D8%A7%D8%B3%D8%AA%D8%AB%D9%86%D8%A7\" >5. \u062e\u0637\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u062f\u0627\u062f\u0647 \u060c \u0646\u0647 \u0627\u0633\u062a\u062b\u0646\u0627<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#6_%D9%85%D8%B9%D9%85%D8%A7%D8%B1%DB%8C_%D9%85%D8%A8%D8%AA%D9%86%DB%8C_%D8%A8%D8%B1_%D8%A7%D9%81%D8%B2%D9%88%D9%86%D9%87\" >6. \u0645\u0639\u0645\u0627\u0631\u06cc \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u0627\u0641\u0632\u0648\u0646\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#7_%DA%A9%D9%84%D8%A7%D8%B3%D9%87%D8%A7%DB%8C_%D9%BE%D8%A7%DB%8C%D9%87_%D8%A7%D9%86%D8%AA%D8%B2%D8%A7%D8%B9%DB%8C_%D9%82%D8%B1%D8%A7%D8%B1%D8%AF%D8%A7%D8%AF%D9%87%D8%A7%DB%8C_%D8%B1%D8%A7%D8%A8%D8%B7\" >7. \u06a9\u0644\u0627\u0633\u0647\u0627\u06cc \u067e\u0627\u06cc\u0647 \u0627\u0646\u062a\u0632\u0627\u0639\u06cc \u0642\u0631\u0627\u0631\u062f\u0627\u062f\u0647\u0627\u06cc \u0631\u0627\u0628\u0637<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#8_%D8%AA%D8%A7%DB%8C%D9%BE_%D8%B3%D8%A7%D8%B2%DB%8C_%D9%82%D9%88%DB%8C_%D8%AF%D8%B1_%D8%A8%D8%B1%D9%86%D8%A7%D9%85%D9%87\" >8. \u062a\u0627\u06cc\u067e \u0633\u0627\u0632\u06cc \u0642\u0648\u06cc \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#9_%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D8%B5%D8%B1%DB%8C%D8%AD_%D8%A7%D8%B2_%D8%AD%D8%A7%D9%84%D8%AA%D9%87%D8%A7%DB%8C_%D8%A7%D9%88%D9%84%DB%8C%D9%87\" >9. \u062a\u0639\u0631\u06cc\u0641 \u0635\u0631\u06cc\u062d \u0627\u0632 \u062d\u0627\u0644\u062a\u0647\u0627\u06cc \u0627\u0648\u0644\u06cc\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#10_%DA%A9%D8%A7%D9%87%D8%B4_%D8%AF%D9%87%D9%86%D8%AF%D9%87_%D9%87%D8%A7%DB%8C_%D8%AE%D8%A7%D9%84%D8%B5_%D8%A7%D9%86%D8%AA%D9%82%D8%A7%D9%84_%D8%AF%D9%88%D9%84%D8%AA\" >10. \u06a9\u0627\u0647\u0634 \u062f\u0647\u0646\u062f\u0647 \u0647\u0627\u06cc \u062e\u0627\u0644\u0635 \u0627\u0646\u062a\u0642\u0627\u0644 \u062f\u0648\u0644\u062a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#%D9%85%D8%AB%D8%A7%D9%84_1_%D8%AC%D8%B1%DB%8C%D8%A7%D9%86_%D8%AA%D8%A3%DB%8C%DB%8C%D8%AF_%D8%AA%D9%88%DA%A9%D9%86_%D8%A8%D8%A7_FSM\" >\u0645\u062b\u0627\u0644 1: \u062c\u0631\u06cc\u0627\u0646 \u062a\u0623\u06cc\u06cc\u062f \u062a\u0648\u06a9\u0646 \u0628\u0627 FSM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#%D9%85%D8%AB%D8%A7%D9%84_2_%D8%AE%D8%B7_%D9%84%D9%88%D9%84%D9%87_%D8%A7%D8%AC%D8%B1%D8%A7%DB%8C_%D9%85%D8%B9%D8%A7%D9%85%D9%84%D9%87\" >\u0645\u062b\u0627\u0644 2: \u062e\u0637 \u0644\u0648\u0644\u0647 \u0627\u062c\u0631\u0627\u06cc \u0645\u0639\u0627\u0645\u0644\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#%D9%85%D8%AB%D8%A7%D9%84_3_%DA%A9%D9%86%D8%AA%D8%B1%D9%84_%DA%A9%D9%86%D9%86%D8%AF%D9%87_%D8%AA%D8%A3%DB%8C%DB%8C%D8%AF_%D8%AA%D9%88%DA%A9%D9%86\" >\u0645\u062b\u0627\u0644 3: \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u0646\u062f\u0647 \u062a\u0623\u06cc\u06cc\u062f \u062a\u0648\u06a9\u0646<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/nabfollower.com\/blog\/fronted-for-web3-dapp-%d8%b1%d9%88%d8%b4%d9%87%d8%a7%db%8c-%d8%ae%d9%88%d8%a8\/#%D9%85%D8%AB%D8%A7%D9%84_4_%D8%A7%D9%86%D8%AA%D9%82%D8%A7%D9%84_%D8%AF%D9%88%D9%84%D8%AA\" >\u0645\u062b\u0627\u0644 4: \u0627\u0646\u062a\u0642\u0627\u0644 \u062f\u0648\u0644\u062a<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_%D8%A7%D8%AA%D8%AD%D8%A7%D8%AF%DB%8C%D9%87_%D9%87%D8%A7%DB%8C_%D8%AA%D8%A8%D8%B9%DB%8C%D8%B6_%D8%A2%D9%85%DB%8C%D8%B2_%D8%A7%DB%8C%D9%85%D9%86%DB%8C_%D9%86%D9%88%D8%B9\"><\/span>\n<p>  1. \u0627\u062a\u062d\u0627\u062f\u06cc\u0647 \u0647\u0627\u06cc \u062a\u0628\u0639\u06cc\u0636 \u0622\u0645\u06cc\u0632 \u0627\u06cc\u0645\u0646\u06cc \u0646\u0648\u0639<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u062a\u062d\u0627\u062f\u06cc\u0647 \u0647\u0627\u06cc \u062a\u0628\u0639\u06cc\u0636 \u0622\u0645\u06cc\u0632 \u062f\u0631 TypeScript <code>kind<\/code> \u06cc\u06a9 \u0631\u0648\u06cc\u06a9\u0631\u062f \u0627\u06cc\u0645\u0646 \u0627\u0632 \u0646\u0648\u0639 \u0628\u0631\u0627\u06cc \u0627\u0644\u06af\u0648\u0628\u0631\u062f\u0627\u0631\u06cc \u0627\u0632 steets \u060c \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u062f\u0633\u062a\u0648\u0631\u0627\u062a \u0645\u062e\u062a\u0644\u0641 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u06a9\u0646\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"c1\">\/\/ State modeling with discriminated unions<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">TxNormalStateIdle<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">idle<\/span><span class=\"dl\">'<\/span> <span class=\"p\">};<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">TxNormalStateSending<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">sending<\/span><span class=\"dl\">'<\/span> <span class=\"p\">};<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">TxNormalStateSuccess<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span> <span class=\"nl\">txHash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Hash<\/span> <span class=\"p\">};<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">TxNormalStateError<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span> <span class=\"nl\">error<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BaseError<\/span> <span class=\"p\">};<\/span>\n\n<span class=\"k\">export<\/span> <span class=\"kd\">type<\/span> <span class=\"nx\">TxNormalState<\/span> <span class=\"o\">=<\/span>\n  <span class=\"o\">|<\/span> <span class=\"nx\">TxNormalStateIdle<\/span>\n  <span class=\"o\">|<\/span> <span class=\"nx\">TxNormalStateSending<\/span>\n  <span class=\"o\">|<\/span> <span class=\"nx\">TxNormalStateSuccess<\/span>\n  <span class=\"o\">|<\/span> <span class=\"nx\">TxNormalStateError<\/span><span class=\"p\">;<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"2_%D8%A7%D9%84%DA%AF%D9%88%DB%8C_%D9%81%D8%B1%D9%85%D8%A7%D9%86-%D8%A7%DB%8C%D8%A7%D9%84%D8%AA%DB%8C\"><\/span>\n<p>  2. \u0627\u0644\u06af\u0648\u06cc \u0641\u0631\u0645\u0627\u0646-\u0627\u06cc\u0627\u0644\u062a\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062c\u062f\u0627\u0633\u0627\u0632\u06cc \u0627\u0642\u062f\u0627\u0645\u0627\u062a \u06a9\u0627\u0631\u0628\u0631 (\u062f\u0633\u062a\u0648\u0631\u0627\u062a) \u060c \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627\u06cc \u0633\u06cc\u0633\u062a\u0645 (\u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627) \u0648 \u0648\u0636\u0639\u06cc\u062a \u0628\u0631\u0646\u0627\u0645\u0647 (STAT) \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u06cc\u06a9 \u062c\u0631\u06cc\u0627\u0646 \u062f\u0627\u062f\u0647 \u06cc\u06a9 \u0637\u0631\u0641\u0647 \u0648\u0627\u0636\u062d \u0648 \u0631\u0648\u0634\u0646 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"c1\">\/\/ Commands - user actions<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">Submit<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">submit<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n  <span class=\"nl\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">tx<\/span><span class=\"p\">:<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">WriteContractParameters<\/span> <span class=\"p\">};<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"c1\">\/\/ Events - system responses<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">SuccessEvent<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n  <span class=\"nl\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">hash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Hash<\/span> <span class=\"p\">};<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"c1\">\/\/ State - application state<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">TxAllowanceStateApproveNeeded<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">approve-needed<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n  <span class=\"nl\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">bigint<\/span><span class=\"p\">;<\/span>\n<span class=\"p\">};<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"3_%D8%AF%D8%B3%D8%AA%DA%AF%D8%A7%D9%87_%D9%87%D8%A7%DB%8C_%D8%AD%D8%A7%D9%84%D8%AA_%D9%85%D8%AD%D8%AF%D9%88%D8%AF\"><\/span>\n<p>  3. \u062f\u0633\u062a\u06af\u0627\u0647 \u0647\u0627\u06cc \u062d\u0627\u0644\u062a \u0645\u062d\u062f\u0648\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0639\u0645\u0644\u06a9\u0631\u062f \u0645\u062f\u0644 \u0633\u0627\u0632\u06cc \u0627\u0632 \u0637\u0631\u06cc\u0642 \u062f\u0633\u062a\u06af\u0627\u0647 \u0647\u0627\u06cc \u062d\u0627\u0644\u062a \u0645\u062d\u062f\u0648\u062f (FSM) \u0628\u0627\u0639\u062b \u0645\u06cc \u0634\u0648\u062f \u06a9\u0647 \u062f\u0648\u0644\u062a\u0647\u0627 \u0627\u0632 \u0627\u0646\u062a\u0642\u0627\u0644 \u062d\u0627\u0644\u062a\u0647\u0627 \u0622\u0634\u06a9\u0627\u0631 \u0634\u062f\u0647 \u0648 \u0627\u0632 \u0627\u0646\u062a\u0642\u0627\u0644 \u063a\u06cc\u0631\u0642\u0627\u0646\u0648\u0646\u06cc \u0622\u0645\u0627\u0631 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0645\u06cc \u06a9\u0646\u0646\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"nx\">reducer<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"nx\">event<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">kind<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">check<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\n        <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">checking-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n      <span class=\"p\">};<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">enough-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">kind<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">rechecking-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n          <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">sending<\/span><span class=\"dl\">'<\/span> <span class=\"p\">};<\/span>\n        <span class=\"nl\">default<\/span><span class=\"p\">:<\/span>\n          <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\n            <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">has-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n          <span class=\"p\">};<\/span>\n      <span class=\"p\">}<\/span>\n    <span class=\"c1\">\/\/ ...<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"4_%D8%A8%D8%B1%D9%86%D8%A7%D9%85%D9%87_%D9%86%D9%88%DB%8C%D8%B3%DB%8C_%D9%88%D8%A7%DA%A9%D9%86%D8%B4%DB%8C_%D1%81_rxjs\"><\/span>\n<p>  4. \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0648\u0627\u06a9\u0646\u0634\u06cc \u0441 rxjs<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0634\u0627\u0647\u062f\u0627\u062a \u0628\u0631\u0627\u06cc \u0639\u0645\u0644\u06cc\u0627\u062a \u0646\u0627\u0647\u0645\u0632\u0645\u0627\u0646 \u0628\u0647\u062a\u0631\u06cc\u0646 \u062a\u0631\u06a9\u06cc\u0628 \u0648 \u0627\u0645\u06a9\u0627\u0646 \u0633\u0627\u0646\u0633\u06cc \u062c\u0631\u06cc\u0627\u0646 \u0631\u0627 \u062f\u0631 \u0635\u0648\u0631\u062a \u0644\u0632\u0648\u0645 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc \u06a9\u0646\u062f (\u0645\u062a\u0623\u0633\u0641\u0627\u0646\u0647 \u060c \u062f\u0631 \u0632\u06cc\u0631 \u062c\u0639\u0628\u0647 \u060c \u062a\u0645\u0627\u0645 API \u0647\u0627\u06cc Web3 \u0647\u0646\u0648\u0632 \u062f\u0631 \u0622\u0646\u062c\u0627 \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0627\u0646\u062f):<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"k\">return<\/span> <span class=\"k\">from<\/span><span class=\"p\">(<\/span>\n  <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">simulateContract<\/span><span class=\"p\">(<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">SimulateContractParameters<\/span><span class=\"o\">&gt;<\/span><span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nf\">tx<\/span><span class=\"p\">())<\/span>\n<span class=\"p\">).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n  <span class=\"nf\">switchMap<\/span><span class=\"p\">(<\/span><span class=\"nx\">response<\/span> <span class=\"o\">=&gt;<\/span>\n    <span class=\"k\">from<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">writeContract<\/span><span class=\"p\">(<\/span><span class=\"nx\">response<\/span><span class=\"p\">.<\/span><span class=\"nx\">request<\/span><span class=\"p\">)).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n      <span class=\"nf\">switchMap<\/span><span class=\"p\">(<\/span><span class=\"nx\">txHash<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"k\">from<\/span><span class=\"p\">(<\/span>\n          <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">waitForTransactionReceipt<\/span><span class=\"p\">({<\/span>\n            <span class=\"na\">hash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">txHash<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">confirmations<\/span><span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span>\n          <span class=\"p\">})<\/span>\n        <span class=\"p\">).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n          <span class=\"nf\">map<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span>\n            <span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span>\n              <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n              <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">hash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">txHash<\/span> <span class=\"p\">},<\/span>\n            <span class=\"p\">})<\/span>\n          <span class=\"p\">)<\/span>\n        <span class=\"p\">);<\/span>\n      <span class=\"p\">}),<\/span>\n      <span class=\"nf\">catchError<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"k\">of<\/span><span class=\"p\">(<\/span><span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"nx\">err<\/span> <span class=\"p\">})))<\/span>\n    <span class=\"p\">)<\/span>\n  <span class=\"p\">),<\/span>\n  <span class=\"nf\">startWith<\/span><span class=\"p\">(<\/span><span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">submitted<\/span><span class=\"dl\">'<\/span> <span class=\"p\">})),<\/span>\n  <span class=\"nf\">take<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">)<\/span>\n<span class=\"p\">);<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"5_%D8%AE%D8%B7%D8%A7_%D8%A8%D9%87_%D8%B9%D9%86%D9%88%D8%A7%D9%86_%D8%AF%D8%A7%D8%AF%D9%87_%D8%8C_%D9%86%D9%87_%D8%A7%D8%B3%D8%AA%D8%AB%D9%86%D8%A7\"><\/span>\n<p>  5. \u062e\u0637\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u062f\u0627\u062f\u0647 \u060c \u0646\u0647 \u0627\u0633\u062a\u062b\u0646\u0627<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062a\u0645\u0627\u0645 \u062e\u0637\u0627\u0647\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0645\u0639\u0645\u0648\u0644\u06cc \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u0634\u0648\u062f \u060c \u0646\u0647 exepshenes. \u0627\u06cc\u0646 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u06a9\u062f \u0631\u0627 \u062a\u0627 \u062d\u062f \u0645\u0645\u06a9\u0646 \u0648\u0627\u0636\u062d \u0648 \u0642\u0627\u0628\u0644 \u067e\u06cc\u0634 \u0628\u06cc\u0646\u06cc \u06a9\u0646\u06cc\u062f \u060c \u0632\u06cc\u0631\u0627 \u0622\u0646\u0647\u0627 \u0628\u0647 \u0644\u0627\u06cc\u0647 \u0627\u06cc \u0627\u0632 \u0645\u0646\u0637\u0642 \u062a\u062c\u0627\u0631\u062a \u0646\u0634\u062a \u0646\u0645\u06cc \u06a9\u0646\u0646\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"c1\">\/\/ Error is just another type of state<\/span>\n<span class=\"kd\">type<\/span> <span class=\"nx\">TxAllowanceStateError<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\n  <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n  <span class=\"nl\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">bigint<\/span><span class=\"p\">;<\/span>\n  <span class=\"nl\">error<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BaseError<\/span><span class=\"p\">;<\/span>\n<span class=\"p\">};<\/span>\n\n<span class=\"c1\">\/\/ Error is handled through the normal event flow<\/span>\n<span class=\"nf\">catchError<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> \n  <span class=\"k\">of<\/span><span class=\"p\">(<\/span><span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span> \n    <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> \n    <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"nx\">err<\/span><span class=\"p\">.<\/span><span class=\"nx\">cause<\/span> <span class=\"o\">??<\/span> <span class=\"nx\">err<\/span> \n  <span class=\"p\">}))<\/span>\n<span class=\"p\">)<\/span>\n\n<span class=\"c1\">\/\/ Inside business logic there is no exception handling, only data handling<\/span>\n<span class=\"nf\">tap<\/span><span class=\"p\">(<\/span><span class=\"nx\">result<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">result<\/span><span class=\"p\">.<\/span><span class=\"nx\">kind<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"c1\">\/\/ do something<\/span>\n  <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\n    <span class=\"c1\">\/\/ do something else, show alert for example<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">})<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"6_%D9%85%D8%B9%D9%85%D8%A7%D8%B1%DB%8C_%D9%85%D8%A8%D8%AA%D9%86%DB%8C_%D8%A8%D8%B1_%D8%A7%D9%81%D8%B2%D9%88%D9%86%D9%87\"><\/span>\n<p>  6. \u0645\u0639\u0645\u0627\u0631\u06cc \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u0627\u0641\u0632\u0648\u0646\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062c\u062f\u0627\u0633\u0627\u0632\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0628\u0647 \u0627\u0641\u0632\u0648\u0646\u0647 \u0647\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0648 \u062e\u0648\u062f\u0645\u062e\u062a\u0627\u0631:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"p\">@<\/span><span class=\"nd\">Injectable<\/span><span class=\"p\">()<\/span>\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">TxAllowanceStore<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">FeatureStore<\/span><span class=\"o\">&lt;<\/span>\n  <span class=\"nx\">TxAllowanceCommand<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">TxAllowanceEvent<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">TxAllowanceState<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">TxAllowanceStateIdle<\/span>\n<span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"c1\">\/\/ Implementation<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"7_%DA%A9%D9%84%D8%A7%D8%B3%D9%87%D8%A7%DB%8C_%D9%BE%D8%A7%DB%8C%D9%87_%D8%A7%D9%86%D8%AA%D8%B2%D8%A7%D8%B9%DB%8C_%D9%82%D8%B1%D8%A7%D8%B1%D8%AF%D8%A7%D8%AF%D9%87%D8%A7%DB%8C_%D8%B1%D8%A7%D8%A8%D8%B7\"><\/span>\n<p>  7. \u06a9\u0644\u0627\u0633\u0647\u0627\u06cc \u067e\u0627\u06cc\u0647 \u0627\u0646\u062a\u0632\u0627\u0639\u06cc \u0642\u0631\u0627\u0631\u062f\u0627\u062f\u0647\u0627\u06cc \u0631\u0627\u0628\u0637<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0644\u0627\u0633\u0647\u0627\u06cc \u0627\u0633\u0627\u0633\u06cc \u0627\u0633\u0627\u0633\u06cc \u0628\u0631\u0627\u06cc \u062a\u0639\u06cc\u06cc\u0646 \u0642\u0631\u0627\u0631\u062f\u0627\u062f\u0647\u0627\u06cc \u0631\u0648\u0634\u0646:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"p\">@<\/span><span class=\"nd\">Injectable<\/span><span class=\"p\">()<\/span>\n<span class=\"k\">export<\/span> <span class=\"kd\">abstract<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">WalletBase<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"nf\">requestConnect<\/span><span class=\"p\">():<\/span> <span class=\"k\">void<\/span><span class=\"p\">;<\/span>\n  <span class=\"k\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"nf\">getCurrentAddress<\/span><span class=\"p\">():<\/span> <span class=\"nx\">Observable<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Hash<\/span> <span class=\"o\">|<\/span> <span class=\"kc\">null<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">;<\/span>\n  <span class=\"k\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"nf\">getBalance<\/span><span class=\"p\">():<\/span> <span class=\"nx\">Observable<\/span><span class=\"o\">&lt;<\/span><span class=\"kr\">string<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">;<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"8_%D8%AA%D8%A7%DB%8C%D9%BE_%D8%B3%D8%A7%D8%B2%DB%8C_%D9%82%D9%88%DB%8C_%D8%AF%D8%B1_%D8%A8%D8%B1%D9%86%D8%A7%D9%85%D9%87\"><\/span>\n<p>  8. \u062a\u0627\u06cc\u067e \u0633\u0627\u0632\u06cc \u0642\u0648\u06cc \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0698\u0646\u0631\u0627\u0644 \u0647\u0627 \u0628\u0631\u0627\u06cc \u0627\u0631\u0627\u0626\u0647 \u0627\u06cc\u0645\u0646\u06cc \u0646\u0648\u0639:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">TxNormalStore<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">FeatureStore<\/span><span class=\"o\">&lt;<\/span>\n  <span class=\"nx\">TxNormalCommand<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">TxNormalEvent<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">TxNormalState<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">TxNormalStateIdle<\/span>\n<span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"c1\">\/\/ Implementation<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"9_%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D8%B5%D8%B1%DB%8C%D8%AD_%D8%A7%D8%B2_%D8%AD%D8%A7%D9%84%D8%AA%D9%87%D8%A7%DB%8C_%D8%A7%D9%88%D9%84%DB%8C%D9%87\"><\/span>\n<p>  9. \u062a\u0639\u0631\u06cc\u0641 \u0635\u0631\u06cc\u062d \u0627\u0632 \u062d\u0627\u0644\u062a\u0647\u0627\u06cc \u0627\u0648\u0644\u06cc\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0646\u0642\u0637\u0647 \u0634\u0631\u0648\u0639 \u0645\u0646\u0637\u0642 \u062a\u062c\u0627\u0631\u062a \u0628\u0631\u0627\u06cc \u0647\u0631 \u0627\u0641\u0632\u0648\u0646\u0647:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"nx\">initialValue<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nl\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">idle<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">amount<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"nx\">n<\/span><span class=\"p\">,<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"10_%DA%A9%D8%A7%D9%87%D8%B4_%D8%AF%D9%87%D9%86%D8%AF%D9%87_%D9%87%D8%A7%DB%8C_%D8%AE%D8%A7%D9%84%D8%B5_%D8%A7%D9%86%D8%AA%D9%82%D8%A7%D9%84_%D8%AF%D9%88%D9%84%D8%AA\"><\/span>\n<p>  10. \u06a9\u0627\u0647\u0634 \u062f\u0647\u0646\u062f\u0647 \u0647\u0627\u06cc \u062e\u0627\u0644\u0635 \u0627\u0646\u062a\u0642\u0627\u0644 \u062f\u0648\u0644\u062a<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062a\u0648\u0627\u0628\u0639 \u062e\u0627\u0644\u0635 \u0628\u0631\u0627\u06cc \u0628\u0647 \u0631\u0648\u0632\u0631\u0633\u0627\u0646\u06cc \u062d\u0627\u0644\u062a \u0628\u0631\u0627\u06cc \u062d\u0641\u0638 \u067e\u06cc\u0634 \u0628\u06cc\u0646\u06cc:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"nx\">reducer<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"nx\">event<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">kind<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">reset<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">idle<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"nx\">n<\/span> <span class=\"p\">};<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">txHash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">hash<\/span> <span class=\"p\">};<\/span>\n    <span class=\"c1\">\/\/ ...<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D9%85%D8%AB%D8%A7%D9%84_1_%D8%AC%D8%B1%DB%8C%D8%A7%D9%86_%D8%AA%D8%A3%DB%8C%DB%8C%D8%AF_%D8%AA%D9%88%DA%A9%D9%86_%D8%A8%D8%A7_FSM\"><\/span>\n<p>  \u0645\u062b\u0627\u0644 1: \u062c\u0631\u06cc\u0627\u0646 \u062a\u0623\u06cc\u06cc\u062f \u062a\u0648\u06a9\u0646 \u0628\u0627 FSM<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u06cc\u0646 \u0645\u062b\u0627\u0644 \u062c\u0631\u06cc\u0627\u0646 \u06a9\u0627\u0645\u0644 \u0628\u0631\u0627\u06cc \u062a\u0623\u06cc\u06cc\u062f \u062a\u0648\u06a9\u0646 \u0631\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u060c \u06a9\u0647 \u06cc\u06a9 \u0627\u0644\u06af\u0648\u06cc \u0645\u0634\u062a\u0631\u06a9 \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u0647\u0627\u06cc DEFI \u0627\u0633\u062a. \u0627\u062c\u0631\u0627\u06cc \u0638\u0631\u06cc\u0641 \u067e\u0631\u062f\u0627\u0632\u0634 \u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u062d\u0627\u0644\u062a \u0631\u0627 \u067e\u0631\u062f\u0627\u0632\u0634 \u0645\u06cc \u06a9\u0646\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"c1\">\/\/ From tx-with-allowance.ts<\/span>\n<span class=\"kd\">function<\/span> <span class=\"nf\">checkAllowance<\/span><span class=\"p\">(<\/span>\n  <span class=\"nx\">client<\/span><span class=\"p\">:<\/span> <span class=\"nx\">PublicClient<\/span> <span class=\"o\">&amp;<\/span> <span class=\"nx\">WalletClient<\/span><span class=\"p\">,<\/span>\n  <span class=\"nx\">data<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Check<\/span><span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">data<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\n<span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"k\">from<\/span><span class=\"p\">(<\/span>\n    <span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">readContract<\/span><span class=\"p\">({<\/span>\n      <span class=\"na\">address<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">token<\/span><span class=\"p\">,<\/span>\n      <span class=\"na\">abi<\/span><span class=\"p\">:<\/span> <span class=\"nx\">erc20Abi<\/span><span class=\"p\">,<\/span>\n      <span class=\"na\">functionName<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n      <span class=\"na\">args<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">userAddress<\/span><span class=\"p\">,<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">spender<\/span><span class=\"p\">],<\/span>\n    <span class=\"p\">})<\/span>\n  <span class=\"p\">).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n    <span class=\"nf\">map<\/span><span class=\"p\">(<\/span><span class=\"nx\">actualAllowance<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n      <span class=\"kd\">const<\/span> <span class=\"nx\">isEnoughAllowance<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">actualAllowance<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">;<\/span>\n      <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">isEnoughAllowance<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span>\n          <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">enough-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n          <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n            <span class=\"na\">spender<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">spender<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">token<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">token<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n          <span class=\"p\">},<\/span>\n        <span class=\"p\">});<\/span>\n      <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span>\n          <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">not-enough-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n          <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n            <span class=\"na\">spender<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">spender<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">token<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">token<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n          <span class=\"p\">},<\/span>\n        <span class=\"p\">});<\/span>\n      <span class=\"p\">}<\/span>\n    <span class=\"p\">}),<\/span>\n    <span class=\"nf\">catchError<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span>\n      <span class=\"k\">of<\/span><span class=\"p\">(<\/span>\n        <span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span>\n          <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">not-enough-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n          <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n            <span class=\"na\">spender<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">spender<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">token<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">token<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n          <span class=\"p\">},<\/span>\n        <span class=\"p\">})<\/span>\n      <span class=\"p\">)<\/span>\n    <span class=\"p\">),<\/span>\n    <span class=\"nf\">take<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D9%85%D8%AB%D8%A7%D9%84_2_%D8%AE%D8%B7_%D9%84%D9%88%D9%84%D9%87_%D8%A7%D8%AC%D8%B1%D8%A7%DB%8C_%D9%85%D8%B9%D8%A7%D9%85%D9%84%D9%87\"><\/span>\n<p>  \u0645\u062b\u0627\u0644 2: \u062e\u0637 \u0644\u0648\u0644\u0647 \u0627\u062c\u0631\u0627\u06cc \u0645\u0639\u0627\u0645\u0644\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u06cc\u0646 \u0645\u062b\u0627\u0644 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u067e\u06cc\u067e\u0644\u0627\u0646 \u0628\u0631\u0627\u06cc \u0645\u0639\u0627\u0645\u0644\u0627\u062a \u0628\u0627 \u067e\u0631\u062f\u0627\u0632\u0634 \u062e\u0637\u0627\u06cc \u0628\u0639\u062f\u06cc:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"c1\">\/\/ From tx-normal.ts<\/span>\n<span class=\"nx\">submit<\/span><span class=\"p\">:<\/span> <span class=\"nx\">cmd<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">const<\/span> <span class=\"nx\">tx<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&lt;<\/span><span class=\"nx\">SimulateContractParameters<\/span><span class=\"o\">&gt;<\/span><span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nf\">tx<\/span><span class=\"p\">();<\/span>\n\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">tx: <\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">tx<\/span><span class=\"p\">);<\/span>\n\n  <span class=\"k\">return<\/span> <span class=\"k\">from<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">simulateContract<\/span><span class=\"p\">(<\/span><span class=\"nx\">tx<\/span><span class=\"p\">)).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n    <span class=\"nf\">switchMap<\/span><span class=\"p\">(<\/span><span class=\"nx\">response<\/span> <span class=\"o\">=&gt;<\/span>\n      <span class=\"k\">from<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">writeContract<\/span><span class=\"p\">(<\/span><span class=\"nx\">response<\/span><span class=\"p\">.<\/span><span class=\"nx\">request<\/span><span class=\"p\">)).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n        <span class=\"nf\">switchMap<\/span><span class=\"p\">(<\/span><span class=\"nx\">txHash<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n          <span class=\"k\">return<\/span> <span class=\"k\">from<\/span><span class=\"p\">(<\/span>\n            <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">waitForTransactionReceipt<\/span><span class=\"p\">({<\/span>\n              <span class=\"na\">hash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">txHash<\/span><span class=\"p\">,<\/span>\n              <span class=\"na\">confirmations<\/span><span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span>\n            <span class=\"p\">})<\/span>\n          <span class=\"p\">).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n            <span class=\"nf\">map<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span>\n              <span class=\"nf\">txNormalEvent<\/span><span class=\"p\">({<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">hash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">txHash<\/span> <span class=\"p\">}<\/span> <span class=\"p\">})<\/span>\n            <span class=\"p\">)<\/span>\n          <span class=\"p\">);<\/span>\n        <span class=\"p\">}),<\/span>\n        <span class=\"nf\">catchError<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n          <span class=\"k\">return<\/span> <span class=\"k\">of<\/span><span class=\"p\">(<\/span><span class=\"nf\">txNormalEvent<\/span><span class=\"p\">({<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"nx\">err<\/span> <span class=\"p\">}));<\/span>\n        <span class=\"p\">})<\/span>\n      <span class=\"p\">)<\/span>\n    <span class=\"p\">),<\/span>\n    <span class=\"nf\">catchError<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n      <span class=\"k\">return<\/span> <span class=\"k\">of<\/span><span class=\"p\">(<\/span>\n        <span class=\"nf\">txNormalEvent<\/span><span class=\"p\">({<\/span>\n          <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n          <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"nx\">err<\/span><span class=\"p\">.<\/span><span class=\"nx\">cause<\/span> <span class=\"o\">??<\/span> <span class=\"nx\">err<\/span><span class=\"p\">,<\/span>\n        <span class=\"p\">})<\/span>\n      <span class=\"p\">);<\/span>\n    <span class=\"p\">}),<\/span>\n    <span class=\"nf\">startWith<\/span><span class=\"p\">(<\/span><span class=\"nf\">txNormalEvent<\/span><span class=\"p\">({<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">submitted<\/span><span class=\"dl\">'<\/span> <span class=\"p\">})),<\/span>\n    <span class=\"nf\">take<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D9%85%D8%AB%D8%A7%D9%84_3_%DA%A9%D9%86%D8%AA%D8%B1%D9%84_%DA%A9%D9%86%D9%86%D8%AF%D9%87_%D8%AA%D8%A3%DB%8C%DB%8C%D8%AF_%D8%AA%D9%88%DA%A9%D9%86\"><\/span>\n<p>  \u0645\u062b\u0627\u0644 3: \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u0646\u062f\u0647 \u062a\u0623\u06cc\u06cc\u062f \u062a\u0648\u06a9\u0646<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u06cc\u0646 \u0645\u062b\u0627\u0644 \u0646\u062d\u0648\u0647 \u067e\u0631\u062f\u0627\u0632\u0634 \u0641\u0631\u0622\u06cc\u0646\u062f \u062a\u0623\u06cc\u06cc\u062f \u062a\u0648\u06a9\u0646 \u0631\u0627 \u0628\u0627 \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc + \u0627\u062c\u0631\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"c1\">\/\/ From tx-with-allowance.ts<\/span>\n<span class=\"nx\">approve<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">cmd<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Approve<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">return<\/span> <span class=\"nf\">defer<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span>\n    <span class=\"k\">from<\/span><span class=\"p\">(<\/span>\n      <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">simulateContract<\/span><span class=\"p\">({<\/span>\n        <span class=\"na\">account<\/span><span class=\"p\">:<\/span> <span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">userAddress<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">address<\/span><span class=\"p\">:<\/span> <span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">token<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">abi<\/span><span class=\"p\">:<\/span> <span class=\"nx\">erc20Abi<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">functionName<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">approve<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">args<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">spender<\/span><span class=\"p\">,<\/span> <span class=\"nx\">MAX_UINT<\/span><span class=\"p\">],<\/span>\n        <span class=\"na\">gas<\/span><span class=\"p\">:<\/span> <span class=\"mi\">65000<\/span><span class=\"nx\">n<\/span><span class=\"p\">,<\/span>\n      <span class=\"p\">})<\/span>\n    <span class=\"p\">)<\/span>\n  <span class=\"p\">).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n    <span class=\"nf\">switchMap<\/span><span class=\"p\">(<\/span><span class=\"nx\">response<\/span> <span class=\"o\">=&gt;<\/span>\n      <span class=\"k\">from<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">writeContract<\/span><span class=\"p\">(<\/span><span class=\"nx\">response<\/span><span class=\"p\">.<\/span><span class=\"nx\">request<\/span><span class=\"p\">)).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span>\n        <span class=\"nf\">switchMap<\/span><span class=\"p\">(<\/span><span class=\"nx\">value<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n          <span class=\"k\">return<\/span> <span class=\"k\">from<\/span><span class=\"p\">(<\/span>\n            <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">.<\/span><span class=\"nf\">waitForTransactionReceipt<\/span><span class=\"p\">({<\/span>\n              <span class=\"na\">hash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">value<\/span><span class=\"p\">,<\/span>\n              <span class=\"na\">confirmations<\/span><span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span>\n            <span class=\"p\">})<\/span>\n          <span class=\"p\">).<\/span><span class=\"nf\">pipe<\/span><span class=\"p\">(<\/span><span class=\"nf\">switchMap<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">checkAllowance<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">client<\/span><span class=\"p\">,<\/span> <span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">)));<\/span>\n        <span class=\"p\">}),<\/span>\n        <span class=\"nf\">catchError<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n          <span class=\"k\">return<\/span> <span class=\"k\">of<\/span><span class=\"p\">(<\/span>\n            <span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span>\n              <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">approve-fail<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n              <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"nx\">err<\/span><span class=\"p\">.<\/span><span class=\"nx\">cause<\/span> <span class=\"o\">??<\/span> <span class=\"nx\">err<\/span><span class=\"p\">,<\/span>\n            <span class=\"p\">})<\/span>\n          <span class=\"p\">);<\/span>\n        <span class=\"p\">})<\/span>\n      <span class=\"p\">)<\/span>\n    <span class=\"p\">),<\/span>\n    <span class=\"nf\">catchError<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span>\n      <span class=\"k\">of<\/span><span class=\"p\">(<\/span>\n        <span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span>\n          <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">approve-fail<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n          <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"nx\">err<\/span><span class=\"p\">.<\/span><span class=\"nx\">cause<\/span> <span class=\"o\">??<\/span> <span class=\"nx\">err<\/span><span class=\"p\">,<\/span>\n        <span class=\"p\">})<\/span>\n      <span class=\"p\">)<\/span>\n    <span class=\"p\">),<\/span>\n    <span class=\"nf\">startWith<\/span><span class=\"p\">(<\/span>\n      <span class=\"nf\">txAllowanceEvent<\/span><span class=\"p\">({<\/span>\n        <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">approve-sent<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">data<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\n          <span class=\"na\">spender<\/span><span class=\"p\">:<\/span> <span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">spender<\/span><span class=\"p\">,<\/span>\n          <span class=\"na\">token<\/span><span class=\"p\">:<\/span> <span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">token<\/span><span class=\"p\">,<\/span>\n          <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">cmd<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n        <span class=\"p\">},<\/span>\n      <span class=\"p\">})<\/span>\n    <span class=\"p\">),<\/span>\n    <span class=\"nf\">take<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D9%85%D8%AB%D8%A7%D9%84_4_%D8%A7%D9%86%D8%AA%D9%82%D8%A7%D9%84_%D8%AF%D9%88%D9%84%D8%AA\"><\/span>\n<p>  \u0645\u062b\u0627\u0644 4: \u0627\u0646\u062a\u0642\u0627\u0644 \u062f\u0648\u0644\u062a<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight typescript\"><code><span class=\"c1\">\/\/ From tx-allowance.ts<\/span>\n<span class=\"nx\">reducer<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"nx\">event<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">event: <\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">event<\/span><span class=\"p\">);<\/span>\n  <span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">kind<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">reset<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">idle<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"nx\">n<\/span> <span class=\"p\">};<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">success<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">txHash<\/span><span class=\"p\">:<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">hash<\/span> <span class=\"p\">};<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"na\">error<\/span><span class=\"p\">:<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">,<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span> <span class=\"p\">};<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">check<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\n        <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">checking-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n        <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n      <span class=\"p\">};<\/span>\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">enough-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n      <span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">kind<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n        <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">rechecking-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\n          <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span> <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">sending<\/span><span class=\"dl\">'<\/span> <span class=\"p\">};<\/span>\n        <span class=\"nl\">default<\/span><span class=\"p\">:<\/span>\n          <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\n            <span class=\"p\">...<\/span><span class=\"nx\">state<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">kind<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">has-allowance<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\n            <span class=\"na\">amount<\/span><span class=\"p\">:<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">amount<\/span><span class=\"p\">,<\/span>\n          <span class=\"p\">};<\/span>\n      <span class=\"p\">}<\/span>\n    <span class=\"c1\">\/\/ Additional cases omitted for brevity<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u0635\u0644 \u060c \u0645\u0646 \u0627\u0632 \u062a\u0645\u0627\u0645 \u0627\u06cc\u0646 \u0631\u0648\u06cc\u06a9\u0631\u062f\u0647\u0627 \u0628\u0631\u0627\u06cc \u0647\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u0645 \u060c \u0627\u0645\u0627 \u062f\u0631 Web3 \u0627\u06cc\u0646 \u0627\u0645\u0631 \u0628\u0647 \u0648\u06cc\u0698\u0647 \u0645\u0631\u062a\u0628\u0637 \u0627\u0633\u062a \u060c \u0632\u06cc\u0631\u0627 \u0648\u0642\u062a\u06cc \u06a9\u06cc\u0641 \u067e\u0648\u0644 \u06a9\u0627\u0631\u0628\u0631 \u0627\u0632 \u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u0627\u06cc\u0627\u0644\u062a \u0647\u0627 \u0639\u0628\u0648\u0631 \u0645\u06cc \u06a9\u0646\u062f (\u0686\u0647 \u062f\u0631 \u0632\u0645\u0627\u0646 \u0627\u062a\u0635\u0627\u0644 \u0648 \u0686\u0647 \u062f\u0631 \u0632\u0645\u0627\u0646 \u0645\u0639\u0627\u0645\u0644\u0647) \u060c \u067e\u0633 \u0627\u0632 \u0622\u0646 \u0628\u062f\u0648\u0646 \u0627\u0644\u06af\u0648\u06cc \u0639\u0627\u062f\u06cc \u062a\u0637\u0628\u06cc\u0642 \u060c \u0627\u06af\u0631 \u062f\u06cc\u06af\u0631 \u0628\u0647 \u062f\u0633\u062a \u0622\u0645\u062f\u0647 \u060c \u0627\u0632 \u0627\u0646\u0628\u0648\u0647\u06cc \u0627\u0632 \u0627\u0646\u0628\u0627\u0634\u062a \u0628\u067e\u0627\u0634\u06cc\u062f. \u0631\u0648\u06cc\u06a9\u0631\u062f \u0641\u0648\u0642 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u062a\u0627 \u0647\u0645\u0647 \u0686\u06cc\u0632 \u0631\u0627 \u0628\u0633\u0627\u0632\u06cc\u062f \u062a\u0627 \u06a9\u0627\u0645\u067e\u0627\u06cc\u0644\u0631 \u062a\u0645\u0627\u0645 \u062d\u0627\u0644\u062a\u0647\u0627\u06cc \u0645\u0645\u06a9\u0646 \u0648 \u0627\u0646\u062a\u0642\u0627\u0644 \u0628\u06cc\u0646 \u0622\u0646\u0647\u0627 \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u062f \u0648 \u0628\u0627\u0631 \u0631\u0627 \u0631\u0648\u06cc \u062a\u0648\u0633\u0639\u0647 \u062f\u0647\u0646\u062f\u0647 \u06a9\u0627\u0647\u0634 \u062f\u0647\u062f.<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>1. \u0627\u062a\u062d\u0627\u062f\u06cc\u0647 \u0647\u0627\u06cc \u062a\u0628\u0639\u06cc\u0636 \u0622\u0645\u06cc\u0632 \u0627\u06cc\u0645\u0646\u06cc \u0646\u0648\u0639 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u062a\u062d\u0627\u062f\u06cc\u0647 \u0647\u0627\u06cc \u062a\u0628\u0639\u06cc\u0636 \u0622\u0645\u06cc\u0632 \u062f\u0631 TypeScript kind \u06cc\u06a9 \u0631\u0648\u06cc\u06a9\u0631\u062f \u0627\u06cc\u0645\u0646 \u0627\u0632 \u0646\u0648\u0639 \u0628\u0631\u0627\u06cc \u0627\u0644\u06af\u0648\u0628\u0631\u062f\u0627\u0631\u06cc \u0627\u0632 steets \u060c \u0631\u0648\u06cc\u062f\u0627\u062f\u0647\u0627 \u0648 \u062f\u0633\u062a\u0648\u0631\u0627\u062a \u0645\u062e\u062a\u0644\u0641 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u06a9\u0646\u062f: \/\/ State modeling with discriminated unions type TxNormalStateIdle = { kind: &#8216;idle&#8217; }; type TxNormalStateSending = { kind: &#8216;sending&#8217; }; type &hellip;<\/p>\n","protected":false},"author":2,"featured_media":101705,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/media2.dev.to\/dynamic\/image\/width=1000,height=500,fit=cover,gravity=auto,format=auto\/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fsxq8l18jjkqp642ppwdo.png","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-101704","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dev"],"_links":{"self":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/101704","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/comments?post=101704"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/101704\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/101705"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=101704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=101704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=101704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}