{"id":2680,"date":"2024-08-19T18:17:00","date_gmt":"2024-08-19T10:17:00","guid":{"rendered":"https:\/\/systw.net\/note\/?p=2680"},"modified":"2025-09-07T00:30:05","modified_gmt":"2025-09-06T16:30:05","slug":"%e6%99%ba%e8%83%bd%e5%90%88%e7%b4%84%e8%88%87javascript","status":"publish","type":"post","link":"https:\/\/systw.net\/note\/archives\/2680","title":{"rendered":"Smart Contracts\u8207JavaScript"},"content":{"rendered":"\n<p>JavaScript\u4f5c\u70ba\u667a\u80fd\u5408\u7d04\u7684\u524d\u7aef\uff0c\u6b63\u662f\u7576\u4eca\u5340\u584a\u93c8\u61c9\u7528\u7a0b\u5f0f\uff08dApps\uff09\u6700\u4e3b\u6d41\u7684\u958b\u767c\u6a21\u5f0f\u3002\u5b83\u5728\u700f\u89bd\u5668\u4e2d\u904b\u884c\uff0c\u662f\u552f\u4e00\u80fd\u8b93\u4f7f\u7528\u8005\u76f4\u63a5\u8207\u5340\u584a\u93c8\u4e92\u52d5\u7684\u7a0b\u5f0f\u8a9e\u8a00\u3002\u5b83\u7684\u6838\u5fc3\u4efb\u52d9\u662f\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u8207\u5340\u584a\u93c8\u4e92\u52d5<\/strong>\uff1a\u4f7f\u7528 Ethers.js \u6216 Web3.js \u9019\u985e\u51fd\u5f0f\u5eab\uff0c\u5c07\u4f7f\u7528\u8005\u5728\u7db2\u9801\u4e0a\u7684\u64cd\u4f5c\uff08\u5982\u9ede\u64ca\u6309\u9215\uff09\u8f49\u63db\u6210\u5340\u584a\u93c8\u80fd\u7406\u89e3\u7684\u4ea4\u6613\u6307\u4ee4\u3002<\/li>\n\n\n\n<li><strong>\u986f\u793a\u5340\u584a\u93c8\u6578\u64da<\/strong>\uff1a\u5f9e\u5340\u584a\u93c8\u8b80\u53d6\u6578\u64da\uff08\u5982\u4ee3\u5e63\u9918\u984d\u3001\u5408\u7d04\u72c0\u614b\uff09\uff0c\u4e26\u5c07\u5176\u5448\u73fe\u5728\u7db2\u9801\u4ecb\u9762\u4e0a\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u5354\u540c\u5de5\u4f5c<\/strong>\u65b9\u5f0f<\/h3>\n\n\n\n<p>JavaScript \u7a0b\u5f0f\u78bc\u9700\u8981\u4e09\u500b\u6838\u5fc3\u8cc7\u8a0a\u624d\u80fd\u8207\u667a\u80fd\u5408\u7d04\u6e9d\u901a\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>1. \u5408\u7d04\u4f4d\u5740 (Contract Address)<\/strong><\/h4>\n\n\n\n<p>\u5c31\u50cf\u7db2\u7ad9\u9700\u8981\u4e00\u500b IP \u4f4d\u5740\u6216\u7db2\u5740\u4e00\u6a23\uff0c\u667a\u80fd\u5408\u7d04\u4e5f\u9700\u8981\u4e00\u500b\u7368\u4e00\u7121\u4e8c\u7684\u300c\u9580\u724c\u865f\u78bc\u300d\u3002\u9019\u500b\u4f4d\u5740\u662f\u7528\u4f86\u5728\u5340\u584a\u93c8\u4e0a\u7cbe\u6e96\u5b9a\u4f4d\u4f60\u7684\u5408\u7d04\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2. ABI (\u61c9\u7528\u7a0b\u5f0f\u4e8c\u9032\u4f4d\u4ecb\u9762)<\/strong><\/h4>\n\n\n\n<p>ABI \u5c31\u50cf\u662f\u5408\u7d04\u7684\u300c\u8aaa\u660e\u66f8\u300d\u3002\u5b83\u7528 JSON \u683c\u5f0f\u5217\u51fa\u4e86\u5408\u7d04\u6240\u6709\u516c\u958b\u7684\u51fd\u5f0f\uff0c\u4ee5\u53ca\u9019\u4e9b\u51fd\u5f0f\u7684\u540d\u7a31\u3001\u53c3\u6578\u3001\u8cc7\u6599\u578b\u614b\u548c\u56de\u50b3\u503c\u3002\u6c92\u6709 ABI\uff0cJavaScript \u5c31\u4e0d\u6703\u77e5\u9053\u5982\u4f55\u6b63\u78ba\u5730\u547c\u53eb\u5408\u7d04\u51fd\u5f0f\uff0c\u6216\u5982\u4f55\u89e3\u6790\u56de\u50b3\u7684\u8cc7\u6599\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>3. Provider (\u7bc0\u9ede\u9023\u7dda)<\/strong><\/h4>\n\n\n\n<p>\u9019\u662f\u4e00\u500b\u8edf\u9ad4\u5c64\u7d1a\u7684\u4ecb\u9762\uff0c\u5b83\u5c07\u4f60\u7a0b\u5f0f\u7684\u8acb\u6c42\uff0c\u900f\u904e RPC (Remote Procedure Call) \u5354\u5b9a\uff0c\u50b3\u9001\u5230\u4e00\u500b\u6216\u591a\u500b\u5340\u584a\u93c8\u7bc0\u9ede\u3002\u7576 JavaScript \u7a0b\u5f0f\u9700\u8981\u8b80\u53d6\u93c8\u4e0a\u8cc7\u6599\u6216\u767c\u9001\u4ea4\u6613\u6642\uff0c\u6703\u900f\u904e Provider \u628a\u8acb\u6c42\u50b3\u9001\u5230RPC \u5340\u584a\u93c8\u7bc0\u9ede\u3002MetaMask \u672c\u8eab\u4e0d\u76f4\u63a5\u63d0\u4f9b\u7bc0\u9ede\uff0c\u800c\u662f\u5c07\u4e00\u500b Provider \u6ce8\u5165\u5230\u7db2\u9801\uff0c\u9019\u500b Provider \u901a\u5e38\u9023\u5230 Infura\uff08MetaMask \u9810\u8a2d\uff09\uff0c\u6216\u662f\u4f7f\u7528\u8005\u5728\u8a2d\u5b9a\u4e2d\u9078\u64c7\u7684 RPC\u5340\u584a\u93c8 \u7bc0\u9ede\u3002\u667a\u80fd\u5408\u7d04\u904b\u884c\u5728\u93c8\u4e0a\uff0c\u800c JavaScript \u53ea\u662f\u547c\u53eb\u5408\u7d04\u3001\u50b3\u9001\u4ea4\u6613\u8207\u63a5\u6536\u56de\u61c9\u7684\u5de5\u5177\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u4e92\u52d5\u6d41\u7a0b<\/strong><\/h3>\n\n\n\n<p>\u7576\u4f60\u7528 JavaScript \u7a0b\u5f0f\u78bc\u547c\u53eb\u4e00\u500b\u667a\u80fd\u5408\u7d04\u51fd\u5f0f\u6642\uff0c\u80cc\u5f8c\u6703\u7d93\u6b77\u4ee5\u4e0b\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>JavaScript \u7a0b\u5f0f\u78bc<\/strong>\uff1a\u4f60\u4f7f\u7528\u50cf Ethers.js \u9019\u6a23\u7684\u51fd\u5f0f\u5eab\uff0c\u5c07\u5408\u7d04\u4f4d\u5740\u3001ABI \u548c Provider \u7d44\u5408\u6210\u4e00\u500b\u5408\u7d04\u7269\u4ef6\u3002<\/li>\n\n\n\n<li><strong>\u547c\u53eb\u51fd\u5f0f<\/strong>\uff1a\u4f60\u5c0d\u9019\u500b\u5408\u7d04\u7269\u4ef6\u547c\u53eb\u4e00\u500b\u51fd\u5f0f\uff0c\u4f8b\u5982 <code>contract.updateMessage(\"Hello\")<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u5c01\u88dd\u6210\u4ea4\u6613<\/strong>\uff1aEthers.js \u6839\u64da ABI \u7684\u5b9a\u7fa9\uff0c\u5c07\u4f60\u7684\u51fd\u5f0f\u547c\u53eb\u3001\u53c3\u6578\u548c\u76ee\u6a19\u5408\u7d04\u4f4d\u5740\uff0c\u6253\u5305\u6210\u4e00\u500b\u6a19\u6e96\u7684\u5340\u584a\u93c8\u4ea4\u6613\u683c\u5f0f\u3002<\/li>\n\n\n\n<li><strong>\u767c\u9001\u4ea4\u6613<\/strong>\uff1a\u4f60\u7684\u700f\u89bd\u5668\u9322\u5305\uff08\u5982 MetaMask\uff09\u6703\u7c3d\u7f72\u9019\u500b\u4ea4\u6613\uff0c\u7136\u5f8c\u900f\u904e Provider \u5c07\u5176\u767c\u9001\u5230\u5340\u584a\u93c8\u7db2\u8def\u3002<\/li>\n\n\n\n<li><strong>\u5340\u584a\u93c8\u57f7\u884c<\/strong>\uff1a\u5340\u584a\u93c8\u4e0a\u7684\u7926\u5de5\u6216\u9a57\u8b49\u8005\u5c07\u4ea4\u6613\u6253\u5305\u9032\u5340\u584a\u4e2d\uff0c\u4e26\u5728\u667a\u80fd\u5408\u7d04\u4e2d\u57f7\u884c <code>updateMessage<\/code> \u9019\u500b\u51fd\u5f0f\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u7c21\u800c\u8a00\u4e4b\uff0c\u667a\u80fd\u5408\u7d04\u662f\u908f\u8f2f\uff0c\u800c JavaScript \u5247\u662f\u5c07\u4f60\u7684\u610f\u5716\u50b3\u9054\u7d66\u9019\u500b\u908f\u8f2f\u7684\u5de5\u5177\u3002\u5b83\u5011\u662f\u5340\u584a\u93c8\u61c9\u7528\u7a0b\u5f0f\u524d\u7aef\u548c\u5f8c\u7aef\u4e0d\u53ef\u6216\u7f3a\u7684\u7d44\u5408\uff0c\u7bc4\u4f8b\u5982\u4e0b\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u667a\u80fd\u5408\u7d04\u548cJS\u4e92\u52d5\u7bc4\u4f8b <\/h2>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u5df1\u7d93\u4e0a\u93c8\u7684\u667a\u80fd\u5408\u7d04<\/p>\n\n\n\n<p><a href=\"https:\/\/sepolia.etherscan.io\/address\/0xa01ab66df445a718943faf29d14589335fe32916#code\" target=\"_blank\" rel=\"noopener\">https:\/\/sepolia.etherscan.io\/address\/0xa01ab66df445a718943faf29d14589335fe32916#code<\/a><\/p>\n\n\n\n<p>\u53bb\u6389\u8a3b\u89e3\u5f8c\u7684\u5167\u5bb9\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ SPDX-License-Identifier: MIT\npragma solidity ^0.8.20;\n\ncontract HelloWorld {\n    string public message;\n    constructor() {\n        message = \"Hello World\";\n    }\n    function updateMessage(string memory _newMessage) public {\n        message = _newMessage;\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u8981\u900f\u904eJS\u53bb\u548c\u667a\u80fd\u5408\u7d04\u4e92\u52d5\uff0c\u53ef\u53c3\u8003\u5982\u4e0b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u8f09\u5165Dapp\u7684JS\u5eab<\/h3>\n\n\n\n<p>\u5e38\u898b\u7684\u5340\u584a\u93c8 JavaScript \u51fd\u5f0f\u5eab\u6709\u4ee5\u4e0b<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ethers.js<\/strong> \u7531\u65bc\u5176\u73fe\u4ee3\u5316\u7684\u8a2d\u8a08\u3001\u66f4\u597d\u7684\u5b89\u5168\u6027\u3001\u66f4\u5c0f\u7684\u9ad4\u7a4d\u4ee5\u53ca\u5c0d async\/await \u7684\u539f\u751f\u652f\u63f4\uff0c\u5df2\u6210\u70ba\u7576\u524d\u958b\u767c\u8005\u7684\u4e3b\u6d41\u9078\u64c7\u3002\u5982\u679c\u4f60\u662f\u65b0\u958b\u767c\u8005\uff0c\u6216\u8005\u6b63\u5728\u958b\u59cb\u4e00\u500b\u65b0\u5c08\u6848\uff0c\u5f37\u70c8\u5efa\u8b70\u5b78\u7fd2\u548c\u4f7f\u7528 Ethers.js\u3002<\/li>\n\n\n\n<li><strong>Web3.js<\/strong> \u96d6\u7136\u8f03\u70ba\u8001\u820a\uff0c\u4f46\u7531\u65bc\u5176\u6b77\u53f2\u60a0\u4e45\uff0c\u64c1\u6709\u9f90\u5927\u7684\u7528\u6236\u793e\u7fa4\u548c\u8c50\u5bcc\u7684\u6559\u5b78\u8cc7\u6e90\u3002\u5982\u679c\u4f60\u7684\u5c08\u6848\u9700\u8981\u7dad\u8b77\u820a\u6709\u7a0b\u5f0f\u78bc\uff0c\u6216\u9700\u8981\u4e00\u4e9b Ethers.js \u672a\u6db5\u84cb\u7684\u7279\u5b9a\u529f\u80fd\uff0cWeb3.js \u4ecd\u7136\u662f\u4e00\u500b\u53ef\u884c\u7684\u9078\u64c7\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/ethers\/6.15.0\/ethers.umd.min.js\" type=\"application\/javascript\"&gt;&lt;\/script&gt;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u5408\u7d04\u5730\u5740<\/h3>\n\n\n\n<p> \u5728 JavaScript \u4e2d\u5b9a\u7fa9\u4e00\u500b\u5e38\u6578 (constant)\uff0c\u7528\u4f86\u5132\u5b58\u667a\u80fd\u5408\u7d04\u5728\u5340\u584a\u93c8\u4e0a\u7684\u4f4d\u5740 <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const CONTRACT_ADDRESS = \"0xa01aB66df445A718943Faf29D14589335FE32916\";<\/code><\/pre>\n\n\n\n<p><strong><code>const<\/code><\/strong>\uff1a\u4e00\u500b JavaScript \u95dc\u9375\u5b57\uff0c\u7528\u4f86\u5ba3\u544a\u4e00\u500b\u5e38\u6578\u3002\u9019\u4ee3\u8868 <code>CONTRACT_ADDRESS<\/code> \u9019\u500b\u8b8a\u6578\u4e00\u65e6\u88ab\u8ce6\u503c\u4e4b\u5f8c\uff0c\u5c31\u4e0d\u80fd\u518d\u88ab\u4fee\u6539\uff0c\u78ba\u4fdd\u4e86\u7a0b\u5f0f\u78bc\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">ABI<\/h3>\n\n\n\n<p>\u5728JavaScript\u4e2d\u6307\u5b9a\u5408\u7d04ABI\uff0c\u5b83\u662f JavaScript \u7a0b\u5f0f\u78bc\u8207\u667a\u80fd\u5408\u7d04\u6e9d\u901a\u7684\u300c\u7ffb\u8b6f\u672c\u300d\u6216\u300c\u4ecb\u9762\u8aaa\u660e\u66f8\u300d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const CONTRACT_ABI = &#91;\n{ \"inputs\": &#91;], \"name\": \"message\", \"outputs\": &#91;{ \"internalType\": \"string\", \"name\": \"\", \"type\": \"string\" }], \"stateMutability\": \"view\", \"type\": \"function\" },\n{ \"inputs\": &#91;{ \"internalType\": \"string\", \"name\": \"_newMessage\", \"type\": \"string\" }], \"name\": \"updateMessage\", \"outputs\": &#91;], \"stateMutability\": \"nonpayable\", \"type\": \"function\" }];<\/code><\/pre>\n\n\n\n<p>PS\uff1aABI\u53ef\u5728\u6b64\u67e5\u5230 <a href=\"https:\/\/sepolia.etherscan.io\/address\/0xa01ab66df445a718943faf29d14589335fe32916#code\" target=\"_blank\" rel=\"noopener\">https:\/\/sepolia.etherscan.io\/address\/0xa01ab66df445a718943faf29d14589335fe32916#code<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u9023\u63a5\u9322\u5305<\/h3>\n\n\n\n<p>\u9023\u63a5\u4f60\u7684\u700f\u89bd\u5668\u9322\u5305\uff08\u5982 MetaMask\uff09\uff0c\u4e26\u5efa\u7acb\u4e00\u500b\u53ef\u4ee5\u8207\u667a\u80fd\u5408\u7d04\u4e92\u52d5\u7684\u7269\u4ef6\u3002\u7c21\u55ae\u4f86\u8aaa\uff0c\u5c31\u662f\u5b8c\u6210\u4e86\u6388\u6b0a\u4f7f\u7528\u8005\u3001\u9023\u4e0a\u5340\u584a\u93c8\u3001\u53d6\u5f97\u7c3d\u540d\u6b0a\u9650\u3001\u4e26\u521d\u59cb\u5316\u5408\u7d04\u4e92\u52d5\u4ecb\u9762\u7684\u6240\u6709\u5de5\u4f5c\uff0c\u70ba\u63a5\u4e0b\u4f86\u7684\u5408\u7d04\u64cd\u4f5c\u505a\u597d\u6e96\u5099\u3002<\/p>\n\n\n\n<p>\u4e3b\u8981\u505a\u56db\u4ef6\u4e8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p><strong>1.\u8acb\u6c42\u4f7f\u7528\u8005\u6388\u6b0a\u9023\u63a5\u9322\u5305\uff1a<\/strong><\/p>\n\n\n\n<p>\u4ee5\u4e0b\u7a0b\u5f0f\u78bc\u6703\u89f8\u767c\u4e00\u500b MetaMask \u5f48\u7a97\uff0c\u8981\u6c42\u4f7f\u7528\u8005\u6388\u6b0a\u7db2\u9801\u9023\u63a5\u4ed6\u5011\u7684\u9322\u5305\u3002<code>eth_requestAccounts<\/code> \u662f\u4e00\u500b\u6a19\u6e96\u7684\u4ee5\u592a\u574a API \u65b9\u6cd5\uff0c\u5b83\u6703\u56de\u50b3\u4f7f\u7528\u8005\u6388\u6b0a\u7684\u9322\u5305\u5e33\u865f\u5217\u8868\u3002\u5982\u679c\u4f7f\u7528\u8005\u62d2\u7d55\uff0c\u7a0b\u5f0f\u6703\u62cb\u51fa\u932f\u8aa4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>await window.ethereum.request({ method: \"eth_requestAccounts\" });<\/code><\/pre>\n\n\n\n<p><strong>2.\u5efa\u7acb Provider\uff1a<\/strong><\/p>\n\n\n\n<p><code>Provider<\/code> \u662f Ethers.js \u4e2d\u7528\u4f86\u8b80\u53d6\u5340\u584a\u93c8\u8cc7\u6599\u7684\u7269\u4ef6\u3002<code>window.ethereum<\/code> \u662f\u7531 MetaMask \u6ce8\u5165\u5230\u700f\u89bd\u5668\u7684\u4e00\u500b\u5168\u57df\u7269\u4ef6\uff0c\u5b83\u63d0\u4f9b\u4e86\u8207\u4ee5\u592a\u574a\u7db2\u8def\u6e9d\u901a\u7684\u4ecb\u9762\u3002\u4ee5\u4e0b\u7a0b\u5f0f\u78bc\u5c31\u662f\u544a\u8a34 Ethers.js\uff1a\u300c\u563f\uff0c\u8acb\u4f7f\u7528 MetaMask \u63d0\u4f9b\u7684\u4ecb\u9762\u4f86\u8207\u5340\u584a\u93c8\u9023\u7dda\u3002\u300d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>provider = new ethers.BrowserProvider(window.ethereum);<\/code><\/pre>\n\n\n\n<p><strong>3.\u53d6\u5f97 Signer\uff1a<\/strong><\/p>\n\n\n\n<p><code>Signer<\/code> \u662f\u7528\u4f86\u767c\u9001\u4ea4\u6613\u548c\u7c3d\u7f72\u8a0a\u606f\u7684\u7269\u4ef6\u3002\u5b83\u4ee3\u8868\u4e86\u4e00\u500b\u7279\u5b9a\u7684\u5e33\u865f\u3002<code>signer<\/code> \u6703\u4f7f\u7528\u4f60\u7684\u9322\u5305\u79c1\u9470\u4f86\u7c3d\u7f72\u4ea4\u6613\uff0c\u4f46\u9019\u500b\u904e\u7a0b\u5b8c\u5168\u5728 MetaMask \u5167\u90e8\u5b8c\u6210\uff0c\u7a0b\u5f0f\u78bc\u6c38\u9060\u7121\u6cd5\u76f4\u63a5\u5b58\u53d6\u4f60\u7684\u79c1\u9470\uff0c\u9019\u78ba\u4fdd\u4e86\u5b89\u5168\u6027\u3002\u7576\u4f60\u60f3\u8981\u547c\u53eb\u4e00\u500b\u9700\u8981\u652f\u4ed8 Gas \u8cbb\u7528\u7684\u5408\u7d04\u51fd\u5f0f\u6642\uff0c\u5c31\u5fc5\u9808\u4f7f\u7528 <code>signer<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>signer = await provider.getSigner();<\/code><\/pre>\n\n\n\n<p><strong>4.\u5efa\u7acb\u5408\u7d04\u5be6\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<p>\u4ee5\u4e0b\u7a0b\u5f0f\u78bc\u5c07\u524d\u9762\u6240\u6709\u6771\u897f\u6574\u5408\u5728\u4e00\u8d77\uff0c\u5efa\u7acb\u4e00\u500b\u53ef\u7528\u7684\u5408\u7d04\u7269\u4ef6\u3002\u9019\u500b\u7269\u4ef6\u77e5\u9053\u4f60\u7684\u5408\u7d04\u5728\u54ea\u88e1\uff08<code>CONTRACT_ADDRESS<\/code>\uff09\u3001\u5b83\u6709\u54ea\u4e9b\u529f\u80fd\uff08<code>CONTRACT_ABI<\/code>\uff09\uff0c\u4e26\u5206\u6210\u4ee5\u4e0b2\u7a2e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u8b80\u53ef\u5beb\u7684\u5be6\u4f8b\uff1a\u9019\u500b\u5be6\u4f8b\u50b3\u5165\u4e86 <code>signer<\/code>\uff0c\u6240\u4ee5\u5b83\u540c\u6642\u5177\u6709\u8b80\u53d6\u548c\u5beb\u5165\u7684\u80fd\u529b\u3002\n<ul class=\"wp-block-list\">\n<li><strong>\u529f\u80fd<\/strong>: \u7528\u65bc\u547c\u53eb\u6703\u6539\u8b8a\u5340\u584a\u93c8\u72c0\u614b\u7684\u51fd\u5f0f\uff0c\u4f8b\u5982\uff1a<code>updateMessage()<\/code>\u3001<code>transfer()<\/code> \u3002<\/li>\n\n\n\n<li><strong>\u7279\u6027<\/strong>: \u9019\u7a2e\u64cd\u4f5c\u9700\u8981\u767c\u9001\u4ea4\u6613\uff0c\u56e0\u6b64\u5fc5\u9808\u900f\u904e <code>signer<\/code> \u4f86\u5411\u4f60\u7684\u9322\u5305\u8acb\u6c42\u7c3d\u540d\u4e26\u652f\u4ed8 Gas \u8cbb\u7528\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u53ef\u8b80\u7684\u5be6\u4f8b\uff1a\u9019\u500b\u5be6\u4f8b\u53ea\u50b3\u5165\u4e86 <code>provider<\/code>\uff0c\u6240\u4ee5\u5b83\u53ea\u5177\u6709\u8b80\u53d6 (Read) \u5340\u584a\u93c8\u8cc7\u6599\u7684\u80fd\u529b\u3002\n<ul class=\"wp-block-list\">\n<li><strong>\u529f\u80fd<\/strong>: \u7528\u65bc\u547c\u53eb\u4e0d\u9700\u8981\u6539\u8b8a\u5340\u584a\u93c8\u72c0\u614b\u7684\u51fd\u5f0f\uff0c\u4f8b\u5982\uff1a<code>message()<\/code>\u3001<code>balanceOf()<\/code> \u6216\u4efb\u4f55\u5e36\u6709 <code>view<\/code> \u6216 <code>pure<\/code> \u95dc\u9375\u5b57\u7684\u51fd\u5f0f\u3002<\/li>\n\n\n\n<li><strong>\u7279\u6027<\/strong>: \u9019\u7a2e\u64cd\u4f5c\u4e0d\u6703\u767c\u9001\u4ea4\u6613\uff0c\u56e0\u6b64\u4e0d\u9700\u8981 Gas \u8cbb\u7528\uff0c\u4e5f\u4e0d\u9700\u8981\u4f60\u7684\u9322\u5305\u9032\u884c\u7c3d\u540d\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>contract = new ethers.Contract(CONTRACT_ADDRESS, CONTRACT_ABI, sign);\nreadOnlyContract = new ethers.Contract(CONTRACT_ADDRESS, CONTRACT_ABI, provider);<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u8b80\u53d6\u5408\u7d04\u8a0a\u606f<\/h3>\n\n\n\n<p>\u900f\u904e\u53ef\u8b80\u7684\u5be6\u4f8b<code>readOnlyContract<\/code>\uff0c\u547c\u53eb\u4e86\u5408\u7d04\u4e2d\u7684 <code>message()<\/code> \u51fd\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const message = await readOnlyContract.message();<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u66f4\u65b0\u5408\u7d04\u8a0a\u606f<\/h3>\n\n\n\n<p>\u900f\u904e\u53ef\u8b80\u53ef\u5beb\u7684\u5be6\u4f8b<code>contract<\/code>\uff0c\u547c\u53eb\u4e86\u5408\u7d04\u4e2d\u7684 <code>updateMessage()<\/code> \u51fd\u5f0f\u3002\u56e0\u70ba\u9019\u500b\u51fd\u5f0f\u6703\u4fee\u6539\u5408\u7d04\u7684\u72c0\u614b\u8b8a\u6578 <code>message<\/code>\uff0c\u6240\u4ee5\u5b83\u9700\u8981\u767c\u9001\u4e00\u7b46\u4ea4\u6613\u3002\u9019\u6642\uff0c\u4f60\u7684 MetaMask \u9322\u5305\u6703\u5f48\u51fa\u4e00\u500b\u8996\u7a97\uff0c\u8981\u6c42\u4f60\u78ba\u8a8d\u4e26\u652f\u4ed8 Gas \u8cbb\u7528\u3002<\/p>\n\n\n\n<p>\u63a5\u8457\u7b2c\u4e8c\u884c\u7a0b\u5f0f\u78bc\u6703\u7b49\u5f85\u4ea4\u6613\u88ab\u5340\u584a\u93c8\u78ba\u8a8d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const tx = await contract.updateMessage(newMessage);\nawait tx.wait();<\/code><\/pre>\n\n\n\n<p><code>tx.wait()<\/code> \u662f\u4e00\u500b Ethers.js \u7684\u65b9\u6cd5\uff0c\u5b83\u6703\u76e3\u807d\u5340\u584a\u93c8\u7db2\u8def\uff0c\u76f4\u5230\u4f60\u7684\u4ea4\u6613\u88ab\u7926\u5de5\u6253\u5305\u9032\u4e00\u500b\u5340\u584a\u3002<\/p>\n\n\n\n<p><code>await<\/code> \u5247\u662f\u544a\u8a34\u7a0b\u5f0f\uff1a\u300c\u8acb\u5728\u9019\u88e1\u505c\u4e0b\u4f86\uff0c\u4e0d\u8981\u7e7c\u7e8c\u57f7\u884c\u5f8c\u9762\u7684\u7a0b\u5f0f\u78bc\uff0c\u76f4\u5230 <code>tx.wait()<\/code> \u56de\u50b3\u4e00\u500b\u7d50\u679c\u3002\u300d<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u7bc4\u4f8bJS <\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c07\u4e0a\u8ff0\u5fc5\u8981\u5143\u4ef6\u7d44\u5408\u8d77\u4f86\u53ef\u7522\u751f\u4e00\u500b\u7c21\u55ae\u7684\u667a\u80fd\u5408\u7d04\u4e92\u52d5JS\uff0c\u7bc4\u4f8bJS\u7a0b\u5f0f\u78bc\u53ef\u53c3\u8003\u4ee5\u4e0b<a href=\"https:\/\/github.com\/Raymond0820\/test\/blob\/master\/index.html\" target=\"_blank\" rel=\"noopener\">https:\/\/github.com\/Raymond0820\/test\/blob\/master\/index.html<\/a><\/li>\n\n\n\n<li>\u5be6\u969b\u61c9\u7528\u4ecb\u9762\u53ef\u53c3\u8003\u6b64\u7db2\u5740<br><a href=\"https:\/\/raymond0820.github.io\/test\" target=\"_blank\" rel=\"noopener\">https:\/\/raymond0820.github.io\/test<\/a><\/li>\n\n\n\n<li>chrome console \u6e2c\u8a66\u5982\u6cd5\u5982\u4e0b \n<ul class=\"wp-block-list\">\n<li>\u547c\u53ebmessage\u8b80\u53d6\u8a0a\u606f <code>await readOnlyContract.message() <\/code><\/li>\n\n\n\n<li>\u547c\u53ebupdateMessage\u66f4\u65b0\u8a0a\u606f <code>await contract.updateMessage(\"new message\")<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript\u4f5c\u70ba\u667a\u80fd\u5408\u7d04\u7684\u524d\u7aef\uff0c\u6b63\u662f\u7576\u4eca\u5340\u584a\u93c8\u61c9\u7528\u7a0b\u5f0f\uff08dApps\uff09\u6700\u4e3b\u6d41\u7684\u958b\u767c\u6a21\u5f0f\u3002\u5b83\u5728\u700f\u89bd\u5668\u4e2d\u904b\u884c\uff0c\u662f\u552f\u4e00\u80fd\u8b93\u4f7f\u7528\u8005\u76f4\u63a5\u8207\u5340\u584a\u93c8\u4e92\u52d5\u7684\u7a0b\u5f0f\u8a9e\u8a00<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[373],"tags":[],"class_list":["post-2680","post","type-post","status-publish","format-standard","hentry","category-smart-contract-develop"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/2680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=2680"}],"version-history":[{"count":7,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/2680\/revisions"}],"predecessor-version":[{"id":2731,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/2680\/revisions\/2731"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=2680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=2680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=2680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}