{ "version": "https://jsonfeed.org/version/1", "title": "Solidity", "description": "Solidity is an object-oriented, high-level language for implementing smart contracts. Solidity \u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u3001\u7528\u4e8e\u5b9e\u73b0\u667a\u80fd\u5408\u7ea6\u7684\u9ad8\u7ea7\u8bed\u8a00\u3002", "home_page_url": "go/solidity", "feed_url": "feed/solidity.json", "icon": "https://cdn.v2ex.com/navatar/e193/47e1/1115_large.png?m=1727245122", "favicon": "https://cdn.v2ex.com/navatar/e193/47e1/1115_normal.png?m=1727245122", "items": [ { "author": { "url": "member/xinhaiw", "name": "xinhaiw", "avatar": "https://cdn.v2ex.com/gravatar/adde29af11b5d18324099ebe1f73043a?s=73&d=retro" }, "url": "t/1142423", "date_modified": "2025-07-02T02:21:39+00:00", "content_html": "

renounced \u7684\u5408\u7ea6\uff0ctax wallet \u8fd8\u662f\u53ef\u4ee5\u6539 tax \u5417

\n

https://etherscan.io/address/0xe01bc45AE62926EC4484D5d803e360931810C4F0#code

\u4f60\u53ef\u4ee5\u83b7\u5f97\u7684\uff1a

\n
1. \u5e74\u5e95\u516c\u53f8\u5229\u6da6\u5206\u7ea2\uff0c\u6839\u636e\u80fd\u529b\u62ff\u5956\u91d1
\n
2. \u524d\u6cbf\u7684\u884c\u4e1a\u8ba4\u77e5\u4e0e\u5b9d\u8d35\u7684\u521b\u4e1a\u7ecf\u5386
\n

\u9009\u62e9\u5927\u4e8e\u52aa\u529b\uff0c\u60f3\u5f2f\u9053\u8d85\u8f66\u3001\u8d85\u8d8a\u540c\u9f84\u4eba\u7684\u5c0f\u4f19\u4f34\u8bf7\u8ddf\u4e0a

\u5c97\u4f4d\u804c\u8d23\uff1a

\n
1. \u4ee5\u592a\u574a\u667a\u80fd\u5408\u7ea6\u5f00\u53d1\u3002
\n
2. \u7814\u7a76\u533a\u5757\u94fe\u9886\u57df\u667a\u80fd\u5408\u7ea6\u7b97\u6cd5\uff0c\u68b3\u7406\u4e3b\u6d41\u516c\u94fe\u5e73\u53f0\u7684\u667a\u80fd\u5408\u7ea6\u6280\u672f\u73b0\u72b6\u4e0e\u4f18\u52a3\u3002\u5bf9\u89c4\u8303\u7684\u667a\u80fd\u5408\u7ea6\u4f53\u7cfb\u6df1\u5165\u7814\u7a76\uff0c\u5305\u62ec\u4e0d\u9650\u4e8e\u4ee5\u592a\u574a\u7b49\u667a\u80fd\u5408\u7ea6\u865a\u62df\u673a\u548c\u7f16\u7a0b\u8bed\u8a00\u3001\u89c4\u8303\u3002
\n
3. \u6839\u636e\u4e1a\u52a1\u7ec6\u5206\u5bf9\u667a\u80fd\u5408\u7ea6\u8fdb\u884c\u62bd\u8c61\u548c\u5b9a\u4e49\uff0c\u5f62\u6210\u534f\u8bae\u5e76\u5229\u7528\u667a\u80fd\u5408\u7ea6\u8fdb\u884c\u534f\u8bae\u9a8c\u8bc1\u6027\u5de5\u4f5c\u548c\u6d4b\u8bd5\u3002
\n
4. \u5229\u7528\u667a\u80fd\u5408\u7ea6\u8fdb\u884c\u8de8\u94fe\u4ea4\u4e92\uff0c\u8de8\u94fe\u76f8\u5173\u529f\u80fd\u5728\u667a\u80fd\u5408\u7ea6\u4e2d\u7684\u7528\u6cd5\u5206\u6790\u548c\u7f16\u7801\u5b9e\u73b0\u3002
\n
5. \u5229\u7528 web3js/web3j \u3001golang \u7b49\u6846\u67b6\u6216\u8bed\u8a00\u5bf9\u667a\u80fd\u5408\u7ea6\u8fdb\u884c\u79c1\u94fe/\u6d4b\u8bd5\u94fe\u9a8c\u8bc1\u6027\u6d4b\u8bd5\uff0c\u4f7f\u7528 Truffle \u548c Openzeppelin \u5bf9\u73b0\u6709\u5408\u7ea6\u8fdb\u884c\u96c6\u6210\u5f00\u53d1\u548c\u4f18\u5316\u3002
\n

\u4efb\u804c\u8981\u6c42\uff1a

\n
1. \u719f\u6089 Solidity \u7f16\u7a0b\uff0c\u80fd\u72ec\u7acb\u5b8c\u6210\u4e1a\u52a1\u903b\u8f91\u7684 solidity \u667a\u80fd\u5408\u7ea6\u7f16\u7a0b\u5b9e\u73b0\uff0c\u4e86\u89e3 EVM \u548c EOS \u865a\u62df\u673a\u57fa\u672c\u539f\u7406\u3002
\n
2. \u719f\u7ec3\u638c\u63e1\u533a\u5757\u94fe\u6280\u672f\uff0c\u719f\u6089\u667a\u80fd\u5408\u7ea6\u5f00\u53d1\u8bed\u8a00 Solidity \uff1b
\n
3. \u719f\u6089\u4f7f\u7528 Openzepplin \u8fdb\u884c\u667a\u80fd\u5408\u7ea6\u9879\u76ee\u8fed\u4ee3\u5f00\u53d1\u548c\u96c6\u6210\u3002
\n
4. \u719f\u6089\u5404\u79cd\u6570\u636e\u7ed3\u6784\u548c\u7b97\u6cd5\uff0c\u5bf9\u5bc6\u7801\u5b66\u3001\u5b89\u5168\u534f\u8bae\u6709\u7814\u7a76\uff1b\u6df1\u5165\u4e86\u89e3\u4ee5\u592a\u574a\u7b49\u533a\u5757\u94fe\u7684\u539f\u7406\u3001\u673a\u5236\u548c\u76f8\u5173\u52a0\u5bc6\u7b97\u6cd5\uff1b
\n
5. \u719f\u6089 Truffle \u5f00\u53d1\u6846\u67b6\u3001\u80fd\u4f7f\u7528 Truffle \u6216 Hardhat \u8fdb\u884c\u667a\u80fd\u5408\u7ea6\u6d4b\u8bd5\u6848\u4f8b\u7684\u7f16\u5199\u548c\u9a8c\u8bc1\u3002
\n
6. \u5bf9\u4ee5\u592a\u574a\u5e95\u5c42\u534f\u8bae\uff0c\u8fd0\u884c\u673a\u5236\u548c\u5e95\u5c42\u5b9e\u73b0\u7b49\u6709\u4e00\u5b9a\u7684\u7814\u7a76\u5206\u6790\uff1b
\n
7. \u62e5\u6709\u4f18\u79c0\u7684\u53d1\u73b0\u548c\u89e3\u51b3\u95ee\u9898\u7684\u80fd\u529b\uff0c\u826f\u597d\u7684\u6c9f\u901a\u548c\u56e2\u961f\u534f\u4f5c\u80fd\u529b\uff0c\u80fd\u627f\u62c5\u4e00\u5b9a\u538b\u529b\uff1b
\n

\u52a0\u5206\u9879\uff1a

\n
1. GitHub \u5f00\u6e90\u9879\u76ee\u4ee3\u7801\uff1b\u6709\u81ea\u5df1\u7684\u6280\u672f\u535a\u5ba2\u3002
\n
2. \u6709\u8fc7\u6210\u529f\u5177\u5907\u4e00\u5b9a\u7528\u6237\u91cf\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e ERC20/ERC721 Token \u5408\u7ea6\u3001DAPP \uff08\u591a\u91cd\u7b7e\u540d\u94b1\u5305\u3001\u6e38\u620f\u6216\u5176\u4ed6\uff09\u667a\u80fd\u5408\u7ea6\u3002\u5728 etherscan \u53ef\u6eaf\u6e90\u9879\u76ee\u6e90\u7801\u3002
\n
3. \u6df1\u523b\u7406\u89e3\u667a\u80fd\u5408\u7ea6\u5b89\u5168\u4f53\u7cfb\uff0c\u5e76\u80fd\u8be6\u7ec6\u9610\u8ff0\u5404\u79cd\u7c7b\u578b\u7684\u667a\u80fd\u5408\u7ea6\u6f0f\u6d1e\u7684\u653b\u9632\u63aa\u65bd
\n

\u8054\u7cfb\u65b9\u5f0f

\u7535\u8bdd&\u5fae\u4fe1: 18320658783

\u6211\u6b63\u5728\u5b66\u4e60 solidity \uff0c\u53d1\u73b0\u56fd\u5185\u57fa\u672c\u6ca1\u6709\u5bf9\u5e94\u8bba\u575b\uff0c\u975e\u5e38\u963b\u788d\u56fd\u4eba\u5f00\u53d1\uff0c\u9042\u5efa\u7acb\u4e86\u4e00\u4e2a v \u7fa4\uff0c\u6709\u5174\u8da3\u7684\u6765\u52a0\uff0c\u5171\u5efa cn solidity \u5f00\u53d1\u793e\u533a\uff01\u521d\u671f\u5efa\u7acb\uff0c\u626b\u7801\u5373\u53ef\u52a0\u5165\uff01

\u63a5 Dapp \u5f00\u53d1\uff0cDapp \u524d\u7aef\u5168\u4f1a\uff0c\u5408\u7ea6\u4f1a\u7684\u6709\uff1a\u8d28\u62bc\u6d41\u52a8\u6027\u6316\u77ff\uff0c\u82b1\u6837 ERC20 \uff0cNFT \u7b49\uff0c\u592a\u590d\u6742\u4e0d\u63a5\uff0c\u6ca1\u65f6\u95f4\u53bb\u505a\u3002

\u5bfc\u8bfb

\u6b64\u6559\u7a0b\u9002\u5408\u81f3\u5c11\u4e86\u89e3\u8fc7\u4e00\u70b9\u5408\u7ea6\u76f8\u5173\u77e5\u8bc6\uff0c\u5bf9\u533a\u5757\u94fe\u6709\u57fa\u672c\u5171\u8bc6\u540c\u5b66\u8fdb\u884c\u89c2\u770b\u3002

\u4e0d\u7ba1\u4f60\u662f\u9700\u8981\u9605\u8bfb\u5408\u7ea6\u6e90\u7801\uff0c\u4ea6\u6216\u662f\u9700\u8981\u7f16\u5199\u5408\u7ea6\u3002\u8fd9\u4efd\u6307\u5357\u90fd\u4f1a\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff0c\u8fd9\u4efd\u4e3a\u4e2a\u4eba\u6574\u7406\u6bd4\u4e0d\u4e0a\u5b98\u65b9\u6587\u6863\uff0c\u4f46\u662f\u5bf9\u7279\u522b\u9700\u8981\u6ce8\u610f\u7684\u77e5\u8bc6\u70b9\u505a\u4e86\u8865\u5145\u8bf4\u660e\uff0c\u53ef\u7528\u6b64\u6587\u6863\u8fdb\u884c\u8fc7\u5ea6\u3002\u5728\u540e\u7eed\u6709\u66f4\u52a0\u7ec6\u8282\u7684\u77e5\u8bc6\u70b9\u9700\u8981\u67e5\u8be2\u65f6\uff0c\u53ef\u5230\u5b98\u65b9\u6587\u6863\u8fdb\u884c\u67e5\u9605\u3002

Official Solidity Docs - EN

Community Solidity Docs - ZH

01. Tutorial

1.1 \u57fa\u7840\u8bed\u6cd5

pragma solidity >=0.4.0 <0.6.0;\ncontract SimpleStorage {\n uint storedData;\n function set(uint x) public {\n storedData = x;\n }\n function get() public view returns (uint) {\n return storedData;\n }\n}\n

\u4e0a\u9762\u662f\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u5408\u7ea6

Pragma

\u7b2c\u4e00\u884c\u8868\u793a\u5408\u7ea6\u5bf9\u5e94\u7684 solidity \u7248\u672c\uff0c\u5927\u4e8e\u7b49\u4e8e 0.4.0 \u4f46\u662f\u5c0f\u4e8e 0.6.0

\u4e5f\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u79cd\u5199\u6cd5

pragma solidity ^0.4.0;\n

Contract

\u5408\u7ea6\u672c\u8d28\u4e0a\u5c31\u662f\u8fd0\u884c\u5728\u533a\u5757\u94fe\u4e0a\u7684\u4e00\u6bb5\u4ee3\u7801\uff0c\u5982\u4e0a\u65b9\u6240\u793a unit storedData \u4ee3\u8868\u4e86\u5b83\u662f\u8fd0\u884c\u4e0a\u533a\u5757\u94fe\u4e0a\u7684\u4e00\u4e2a\u53d8\u91cf\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0b\u65b9\u7684 get set \u6765\u5bf9\u4ed6\u8fdb\u884c\u4fee\u6539\u3002

Import

\u5728 solidity \u8bed\u8a00\u4e2d\uff0c\u60f3\u8981\u4f7f\u7528\u5176\u4ed6\u6a21\u5757\u7684\u65b9\u6cd5\u6216\u5c5e\u6027\uff0c\u5219\u9700\u8981\u8fdb\u884c\u5012\u5165\uff0c\u603b\u5171\u7531\u4e24\u79cd\u65b9\u6cd5

import \"filename\"\n

\u4e5f\u53ef\u4ee5\u4f7f\u7528

import * as symbolName from \"filename\";\n

1.2 \u7b2c\u4e00\u4e2a\u7a0b\u5e8f

\n

\u6ce8\u610f\uff1asolidity \u4e0d\u50cf JS JAVA \u7b49\u8bed\u8a00\uff0c\u53ef\u4ee5\u76f4\u63a5\u5728\u672c\u5730\u8fd0\u884c\uff0c\u5b83\u66f4\u591a\u7684\u662f\u9700\u8981\u50cf EVM \u8fd9\u6837\u7684\u73af\u5883\u624d\u80fd\u8fd0\u884c\uff0c\u6240\u4ee5\u5728\u521a\u5f00\u59cb\u7ec3\u4e60\u7684\u65f6\u5019\uff0c\u6700\u597d\u662f\u7528\u6bd4\u8f83\u7b80\u5355\uff0c\u80fd\u76f4\u89c2\u770b\u5230\u7ed3\u679c\u7684\u7f16\u8f91\u5668\u3002

\n

\u6253\u5f00\u9875\u9762 Remix IDE\uff0c\u8fd0\u884c\u6211\u4eec\u7684\u4ee3\u7801\u3002

Step 1

\u5c06\u4e0b\u65b9 Example \u4e2d\u7684\u4ee3\u7801\u62f7\u8d1d\u5230 Remix \u4e2d

Example

pragma solidity ^0.5.0;\ncontract SolidityTest {\n constructor() public{\n }\n function getResult() public view returns(uint){\n uint a = 1;\n uint b = 2;\n uint result = a + b;\n return result;\n }\n}\n

Step 2

\u5207\u6362\u5230 \u7f16\u8bd1 Tab \uff0c\u70b9\u51fb\u7f16\u8bd1

Step 3

\u70b9\u51fb\u90e8\u7f72

Step 4

\u90e8\u7f72\u5b8c\u6210\u4e4b\u540e\uff0c\u4e0b\u65b9\u5c31\u53ef\u4ee5\u770b\u5230\u6211\u4eec\u90e8\u7f72\u540e\u7684\u5408\u7ea6

\u7136\u540e\u5c06\u5408\u7ea6\u5c55\u5f00,\u5c55\u5f00\u4e4b\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u5728\u8fd9\u91cc\u9762\u8c03\u7528\u5408\u7ea6\u4e2d\u4ee3\u7801\u3002

\u70b9\u51fb getResult

\u5c31\u80fd\u5f97\u5230\u7ed3\u679c\u3002\u8fd9\u6837\u6211\u4eec\u5c31\u5b8c\u6210\u4e86\u7b2c\u4e00\u4e2a solidity \u7a0b\u5e8f\u7684\u7f16\u5199\u548c\u90e8\u7f72\u6d4b\u8bd5\u3002

1.3 \u6ce8\u91ca

\u652f\u6301\u4e24\u79cd\u5f62\u5f0f

function getResult() public view returns(uint){\n // This is a comment. It is similar to comments in C++\n\n /*\n * This is a multi-line comment in solidity\n * It is very similar to comments in C Programming\n */\n uint a = 1;\n uint b = 2;\n uint result = a + b;\n return result;\n}\n

1.4 \u7c7b\u578b

types

\u5730\u5740 Address

address \u4fdd\u5b58\u4ee3\u8868\u4ee5\u592a\u574a\u5730\u5740\u5927\u5c0f\u7684 20 \u5b57\u8282\u503c\u3002 \u4e00\u4e2a\u5730\u5740\u53ef\u4ee5\u4f7f\u7528 .balance \u65b9\u6cd5\u83b7\u53d6\u4f59\u989d\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 .transfer \u65b9\u6cd5\u5c06\u4f59\u989d\u8f6c\u79fb\u5230\u53e6\u4e00\u4e2a\u5730\u5740\u3002

address x = 0x212;\naddress myAddress = this;\nif (x.balance < 10 && myAddress.balance >= 10) x.transfer(10);\n

address \u8fd9\u91cc\u5bb9\u6613\u8ba9\u4eba\u6709\u70b9\u8bef\u89e3\uff0c\u660e\u660e\u5b58\u5165\u7684\u662f 0x1341243243... \u8fd9\u6837\u7684\u4e00\u4e2a\u4e1c\u897f\uff0c\u4f46\u662f\u5374\u53ef\u4ee5\u76f4\u63a5\u70b9\u51fa\u65b9\u6cd5 balance \u548c transfer\u3002\u8fd9\u91cc\u9700\u8981\u6d88\u5316\u4e00\u4e0b\uff0c\u4e0d\u7136\u540e\u9762\u5bb9\u6613\u61f5\u3002

\u8fd9\u91cc\u7684 address \u5bf9\u8c61\u6211\u4eec\u53ef\u4ee5\u7406\u89e3\u4e3a\u662f\u4e00\u4e2a\u5305\u88c5\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u76f4\u63a5\u7406\u89e3 address \u4e3a\u4e00\u4e2a\u7c7b\uff0c\u4ed6\u672c\u8eab\u5c31\u5177\u5907\u5f88\u591a\u65b9\u6cd5\u3002\u53ea\u4e0d\u8fc7\u5728\u521d\u59cb\u5316\u7684\u65f6\u5019\u8ddf\u4f20\u7edf\u7684 Struct \u7ed3\u6784\u7684\u6570\u636e\u4e0d\u4e00\u6837\u3002\u53ea\u9700\u8981\u8bbe\u7f6e\u5730\u5740\u5c31\u53ef\u4ee5\u4e86\uff0c\u7a0b\u5e8f\u4f1a\u81ea\u52a8\u5e2e\u6211\u4eec\u5904\u7406\u3002

address \u4e2d\u6240\u6709\u7684\u53ef\u7528\u65b9\u6cd5

<address>.balance (uint256):

\u4ee5 Wei \u4e3a\u5355\u4f4d\u7684 \u5730\u5740\u7c7b\u578b \u7684\u4f59\u989d\u3002

<address>.transfer(uint256 amount):

\u5411 \u5730\u5740\u7c7b\u578b \u53d1\u9001\u6570\u91cf\u4e3a amount \u7684 Wei \uff0c\u5931\u8d25\u65f6\u629b\u51fa\u5f02\u5e38\uff0c\u53d1\u9001 2300 gas \u7684\u77ff\u5de5\u8d39\uff0c\u4e0d\u53ef\u8c03\u8282\u3002

<address>.send(uint256 amount) returns (bool):

\u5411 \u5730\u5740\u7c7b\u578b \u53d1\u9001\u6570\u91cf\u4e3a amount \u7684 Wei \uff0c\u5931\u8d25\u65f6\u8fd4\u56de false\uff0c\u53d1\u9001 2300 gas \u7684\u77ff\u5de5\u8d39\u7528\uff0c\u4e0d\u53ef\u8c03\u8282\u3002

<address>.call(...) returns (bool):

\u53d1\u51fa\u4f4e\u7ea7\u51fd\u6570 CALL\uff0c\u5931\u8d25\u65f6\u8fd4\u56de false\uff0c\u53d1\u9001\u6240\u6709\u53ef\u7528 gas \uff0c\u53ef\u8c03\u8282\u3002

<address>.callcode(...) returns (bool)\uff1a

\u53d1\u51fa\u4f4e\u7ea7\u51fd\u6570 CALLCODE\uff0c\u5931\u8d25\u65f6\u8fd4\u56de false\uff0c\u53d1\u9001\u6240\u6709\u53ef\u7528 gas \uff0c\u53ef\u8c03\u8282\u3002

<address>.delegatecall(...) returns (bool):

\u53d1\u51fa\u4f4e\u7ea7\u51fd\u6570 DELEGATECALL\uff0c\u5931\u8d25\u65f6\u8fd4\u56de false\uff0c\u53d1\u9001\u6240\u6709\u53ef\u7528 gas \uff0c\u53ef\u8c03\u8282\u3002

1.5 \u53d8\u91cf

\n

\u6b64\u5c0f\u8282\u975e\u5e38\u91cd\u8981\u3002

\n

\u5728 Solidity \u4e2d\u603b\u5171\u6709 3 \u79cd\u53d8\u91cf

\n
• \u72b6\u6001\u53d8\u91cf
\n
• \u672c\u5730\u53d8\u91cf
\n
• \u5168\u5c40\u53d8\u91cf
\n

\u72b6\u6001\u53d8\u91cf

\u8868\u660e\u5b58\u50a8\u5728\u5408\u7ea6\u4e2d\u7684\u53d8\u91cf\uff0c\u4ec0\u4e48\u53eb\u5b58\u50a8\u5728\u5408\u7ea6\u4e2d\u5462\uff0c\u5176\u5b9e\u5c31\u76f8\u5f53\u4e8e Java \u91cc\u9762\u7684\u6210\u5458\u53d8\u91cf\uff0c\u5728 solidity \u4e2d\u7684\u5199\u6cd5\u5982\u4e0b

pragma solidity ^0.5.0;\ncontract SolidityTest {\n uint storedData; // State variable\n constructor() public {\n storedData = 10; // Using State variable\n }\n}\n

\u672c\u5730\u53d8\u91cf

\u5176\u503c\u4ec5\u5728\u5b9a\u4e49\u5b83\u7684\u51fd\u6570\u5185\u53ef\u7528\u7684\u53d8\u91cf\u3002 \u51fd\u6570\u53c2\u6570\u59cb\u7ec8\u662f\u8be5\u51fd\u6570\u7684\u672c\u5730\u53c2\u6570\u3002\u5176\u5b9e\u8bf4\u767d\u4e86\u5c31\u662f\u5c40\u90e8\u53d8\u91cf\uff0c\u5c31\u662f\u5199\u5728\u65b9\u6cd5\u91cc\u9762\u7684\u3002

pragma solidity ^0.5.0;\ncontract SolidityTest {\n uint storedData; // State variable\n constructor() public {\n storedData = 10; \n }\n function getResult() public view returns(uint){\n uint a = 1; // local variable\n uint b = 2;\n uint result = a + b;\n return result; //access the local variable\n }\n}\n

\u5168\u5c40\u53d8\u91cf [\u91cd\u8981\u203c\ufe0f]

\u5168\u5c40\u53d8\u91cf\u662f\u5b58\u5728\u4e8e\u5168\u5c40\u5de5\u4f5c\u7a7a\u95f4\u4e2d\u7684\u7279\u6b8a\u53d8\u91cf\uff0c\u5b83\u4eec\u63d0\u4f9b\u5173\u4e8e\u533a\u5757\u94fe\u548c\u4ea4\u6613\u5c5e\u6027\u7684\u4fe1\u606f\u3002\u8bf4\u767d\u4e86\u5c31\u662f\u4e0d\u9700\u8981\u58f0\u660e\uff0c\u6709\u70b9\u7c7b\u4f3c\u4e8e Node \u91cc\u9762\u7684 Process \uff0c\u6d4f\u89c8\u5668\u91cc\u9762\u7684 Windows \uff0c\u53ef\u4ee5\u76f4\u63a5\u62ff\u6765\u4f7f\u7528\u3002

Solidity \u4e2d\u7684\u5168\u5c40\u53d8\u91cf\u6709\u4e0b\u9762\u51e0\u79cd\u3002

\n
• block.blockhash(uint blockNumber) returns (bytes32)\uff1a\u6307\u5b9a\u533a\u5757\u7684\u533a\u5757\u54c8\u5e0c\u2014\u2014\u4ec5\u53ef\u7528\u4e8e\u6700\u65b0\u7684 256 \u4e2a\u533a\u5757\u4e14\u4e0d\u5305\u62ec\u5f53\u524d\u533a\u5757\uff1b\u800c blocks \u4ece 0.4.22 \u7248\u672c\u5f00\u59cb\u5df2\u7ecf\u4e0d\u63a8\u8350\u4f7f\u7528\uff0c\u7531 blockhash(uint blockNumber) \u4ee3\u66ff
\n
• block.coinbase (address): \u6316\u51fa\u5f53\u524d\u533a\u5757\u7684\u77ff\u5de5\u5730\u5740
\n
• block.difficulty (uint): \u5f53\u524d\u533a\u5757\u96be\u5ea6
\n
• block.gaslimit (uint): \u5f53\u524d\u533a\u5757 gas \u9650\u989d
\n
• block.number (uint): \u5f53\u524d\u533a\u5757\u53f7
\n
• block.timestamp (uint): \u81ea unix epoch \u8d77\u59cb\u5f53\u524d\u533a\u5757\u4ee5\u79d2\u8ba1\u7684\u65f6\u95f4\u6233
\n
• gasleft() returns (uint256)\uff1a\u5269\u4f59\u7684 gas
\n
• msg.data (bytes): \u5b8c\u6574\u7684 calldata
\n
• msg.gas (uint): \u5269\u4f59 gas - \u81ea 0.4.21 \u7248\u672c\u5f00\u59cb\u5df2\u7ecf\u4e0d\u63a8\u8350\u4f7f\u7528\uff0c\u7531 gesleft() \u4ee3\u66ff
\n
• msg.sender (address): \u6d88\u606f\u53d1\u9001\u8005\uff08\u5f53\u524d\u8c03\u7528\uff09
\n
• msg.sig (bytes4): calldata \u7684\u524d 4 \u5b57\u8282\uff08\u4e5f\u5c31\u662f\u51fd\u6570\u6807\u8bc6\u7b26\uff09
\n
• msg.value (uint): \u968f\u6d88\u606f\u53d1\u9001\u7684 wei \u7684\u6570\u91cf
\n
• now (uint): \u76ee\u524d\u533a\u5757\u65f6\u95f4\u6233\uff08block.timestamp\uff09
\n
• tx.gasprice (uint): \u4ea4\u6613\u7684 gas \u4ef7\u683c
\n
• tx.origin (address): \u4ea4\u6613\u53d1\u8d77\u8005\uff08\u5b8c\u5168\u7684\u8c03\u7528\u94fe\uff09
\n

\u770b\u4e00\u4e0b\u5728\u5408\u7ea6\u4e2d\u5982\u4f55\u4f7f\u7528 \u5168\u5c40\u53d8\u91cf

pragma solidity ^0.5.0;\ncontract SolidityTest {\n\n function getNowTime() public view returns(uint) {\n return now;\n }\n\n function getSender() public view returns (address payable) {\n return msg.sender;\n }\n\n function getGaslimit() public view returns (uint) {\n return block.gaslimit;\n }\n}\n

\u7136\u540e\u5728\u4ece\u65b0\u70b9\u51fb \u90e8\u7f72\uff0c\u6309\u7167\u4e0a\u9762\u8bb2\u8fc7\u7684\u6b65\u9aa4

\u7136\u540e\u8fd0\u884c\u90e8\u7f72\u540e\u7684\u5408\u7ea6\u3002

\u53d8\u91cf\u547d\u540d\u89c4\u8303

\n
• \n

  \u60a8\u4e0d\u5e94\u4f7f\u7528\u4efb\u4f55 Solidity \u4fdd\u7559\u5173\u952e\u5b57\u4f5c\u4e3a\u53d8\u91cf\u540d\u3002 \u8fd9\u4e9b\u5173\u952e\u5b57\u5c06\u5728\u4e0b\u4e00\u8282\u4e2d\u63d0\u5230\u3002 \u4f8b\u5982\uff0cbreak, bool \u3002

  \n
\n
• \n

  Solidity \u53d8\u91cf\u540d\u79f0\u4e0d\u5e94\u4ee5\u6570\u5b57 (0-9) \u5f00\u5934\u3002 \u5b83\u4eec\u5fc5\u987b\u4ee5\u5b57\u6bcd\u6216\u4e0b\u5212\u7ebf\u5b57\u7b26\u5f00\u5934\u3002 \u4f8b\u5982\uff0c123test \u662f\u4e00\u4e2a\u65e0\u6548\u7684\u53d8\u91cf\u540d\uff0c\u4f46 _123test \u662f\u4e00\u4e2a\u6709\u6548\u7684\u53d8\u91cf\u540d\u3002

  \n
\n
• \n

  Solidity \u53d8\u91cf\u540d\u79f0\u533a\u5206\u5927\u5c0f\u5199\u3002 \u4f8b\u5982\uff0cname \u548c Name \u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u53d8\u91cf\u3002

  \n
\n

1.6 \u53d8\u91cf\u4f5c\u7528\u57df

\u5728 1.5 \u5c0f\u8282\u4e2d\u8bb2\u5230 Solidity \u4e2d\u6709\u4e09\u79cd\u7c7b\u578b\u7684\u53d8\u91cf

\n
• \u72b6\u6001\u53d8\u91cf
\n
• \u672c\u5730\u53d8\u91cf
\n
• \u5168\u5c40\u53d8\u91cf
\n

\u672c\u5730\u53d8\u91cf\u7684\u4f5c\u7528\u4e8e\u53ea\u5b58\u5728\u4e8e\u65b9\u6cd5\u4e2d\uff0c\u4f46\u662f\u72b6\u6001\u53d8\u91cf\u6709\u4e09\u79cd\u4f5c\u7528\u57df\u3002

\n
• \n

  Public

  \n

  \u516c\u5171\u72b6\u6001\u53d8\u91cf\u53ef\u4ee5\u5728\u5185\u90e8\u8bbf\u95ee\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u6d88\u606f\u8bbf\u95ee\u3002 \u5bf9\u4e8e\u516c\u5171\u72b6\u6001\u53d8\u91cf\uff0c\u4f1a\u751f\u6210\u4e00\u4e2a\u81ea\u52a8 getter \u51fd\u6570\u3002

  \n
\n
• \n

  Internal

  \n

  \u5185\u90e8\u72b6\u6001\u53d8\u91cf\u53ea\u80fd\u4ece\u5f53\u524d\u5408\u7ea6\u6216\u4ece\u5b83\u6d3e\u751f\u7684\u5408\u7ea6\u5185\u90e8\u8bbf\u95ee\uff0c\u800c\u4e0d\u4f7f\u7528 this \u3002\u5c31\u7c7b\u4f3c\u4e8e Java \u91cc\u9762\u7684 protected

  \n
\n
• \n

  Private

  \n

  \u79c1\u6709\u72b6\u6001\u53d8\u91cf\u53ea\u80fd\u5728\u5f53\u524d\u5408\u7ea6\u5185\u90e8\u8bbf\u95ee\uff0c\u5b83\u4eec\u4e0d\u662f\u5728\u6d3e\u751f\u5408\u7ea6\u4e2d\u5b9a\u4e49\u7684\u3002

  \n
\n
• \n

  \uff1f External

  \n
\n

pragma solidity ^0.5.0;\ncontract C {\n uint public data = 30;\n uint internal iData= 10;\n \n function x() public returns (uint) {\n data = 3; // internal access\n return data;\n }\n}\ncontract Caller {\n C c = new C();\n function f() public view returns (uint) {\n return c.data(); //external access\n }\n}\ncontract D is C {\n function y() public returns (uint) {\n iData = 3; // internal access\n return iData;\n }\n function getResult() public view returns(uint){\n uint a = 1; // local variable\n uint b = 2;\n uint result = a + b;\n return storedData; //access the state variable\n }\n}\n

\u4e0a\u65b9 Example \u7684\u5408\u7ea6\u5173\u7cfb\u4e3a

\n
• \u5b9a\u4e49\u4e86\u4e00\u4e2a \u5408\u7ea6 C \uff0c\u5e76\u5728\u5408\u7ea6 C \u79cd\u5b9a\u4e49\u4e86\u4e00\u4e2a public \u72b6\u6001\u53d8\u91cf\u548c\u4e00\u4e2a interval \u72b6\u6001\u53d8\u91cf
\n
• \u5b9a\u4e49\u4e86\u4e00\u4e2a\u5408\u7ea6 Caller \uff0c\u5e76\u5728\u5185\u90e8 New \u4e86\u5408\u7ea6 C
\n
• \u5b9a\u4e49\u4e86\u4e00\u4e2a\u5408\u7ea6 D \u5e76\u7ee7\u627f C
\n

1.7 \u7701\u7565\u7ae0\u8282

\n
• \u5faa\u73af
\n
• if
\n
• \u64cd\u4f5c\u7b26
\n
• array
\n
• enum
\n

\u4ee5\u4e0a\u5185\u5bb9\u90fd\u6bd4\u8f83\u5e38\u89c4\uff0c\u548c\u5e73\u5e38\u4f7f\u7528\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u8bed\u6cd5\u5dee\u5f02\u4e0d\u5927\u3002\u5927\u5bb6\u6709\u5174\u8da3\u53ef\u4ee5\u67e5\u67e5\u5b98\u65b9\u6587\u6863\uff0c\u8fd9\u91cc\u5c31\u4e0d\u5728\u8d58\u8ff0\u3002

1.8 struct

struct struct_name { \n type1 type_name_1;\n type2 type_name_2;\n type3 type_name_3;\n}\n

struct \u53ef\u4ee5\u7406\u89e3\u4e3a\u591a\u79cd\u7c7b\u578b\u7684\u4e00\u4e2a\u5305\u88c5\uff0c\u5c31\u548c\u5305\u88c5\u6570\u636e\u7c7b\u578b\u662f\u4e00\u6837\u7684\u3002

Eample

pragma solidity ^0.5.0;\n\ncontract test {\n struct Book { \n string title;\n string author;\n uint book_id;\n }\n Book book;\n\n function setBook() public {\n book = Book('Learn Java', 'TP', 1);\n }\n function getBookId() public view returns (uint) {\n return book.book_id;\n }\n}\n

1.9 Mapping

mapping(_KeyType => _ValueType)

\n
• _KeyType: \u53ef\u4ee5\u662f\u4efb\u4f55\u5185\u7f6e\u7c7b\u578b\u52a0\u4e0a\u5b57\u8282\u548c\u5b57\u7b26\u4e32\u3002\u4e0d\u5141\u8bb8\u5f15\u7528\u7c7b\u578b\u6216\u590d\u6742\u5bf9\u8c61\u3002
\n
• _ValueType: \u4efb\u4f55\u7c7b\u578b\u90fd\u53ef\u4ee5
\n

\u53ef\u4ee5\u7406\u89e3\u4e3a Hash \u7c7b\u578b

pragma solidity ^0.5.0;\n\ncontract LedgerBalance {\n mapping(address => uint) public balances;\n\n function updateBalance(uint newBalance) public {\n balances[msg.sender] = newBalance;\n }\n}\ncontract Updater {\n function updateBalance() public returns (uint) {\n LedgerBalance ledgerBalance = new LedgerBalance();\n ledgerBalance.updateBalance(10);\n return ledgerBalance.balances(address(this));\n }\n}\n

https://twitter.com/AzukiZen/status/1485026548289732608

https://github.com/chiru-labs/ERC721A

Solidity \u6700\u65b0 0.5.8 \u4e2d\u6587\u6587\u6863\u53d1\u5e03\u5566~~~ \uff0c \u8fd9\u4e0d\u5355\u662f\u4e00\u4efd Solidity \u901f\u67e5\u624b\u518c\uff0c\u66f4\u662f\u4e00\u4efd\u6df1\u5165\u4ee5\u592a\u574a\u667a\u80fd\u5408\u7ea6\u5f00\u53d1\u5b9d\u5178\u3002

\u7ffb\u8bd1\u8bf4\u660e

Solidity \u6700\u65b0 0.5.8 \u4e2d\u6587\u6587\u6863 \u6839\u636e\u5f53\u524d\u00a0\u6700\u65b0\u5b98\u65b9\u7248\u672c v0.5.8\u00a0\u8fdb\u884c\u7ffb\u8bd1\uff0c\u672c\u7ffb\u8bd1\u6700\u521d\u00a0HiBlock\u00a0\u793e\u533a\u53d1\u8d77\uff0c\u540e\u7ecf\u8fc7\u00a0\u6df1\u5165\u6d45\u51fa\u533a\u5757\u94fe\u793e\u533a\u00a0\u793e\u533a\u6210\u5458\u6839\u636e\u6700\u65b0\u7248\u672c\u8865\u5145\u7ffb\u8bd1\u3002

\u5927\u90e8\u5206\u7684\u8bd1\u8005\uff0c\u90fd\u662f\u56fd\u5185\u9876\u5c16\u7684\u4ee5\u592a\u574a\u5f00\u53d1\u548c\u7814\u7a76\u4eba\u5458\uff0c\u90e8\u5206\u8bd1\u8005\u5982\u4e0b\uff1a

\n
• \u6768\u9547 \u300a\u6df1\u5165\u4ee5\u592a\u574a\u667a\u80fd\u5408\u7ea6\u5f00\u53d1\u300b\u4f5c\u8005\uff0c\u300a\u7cbe\u901a\u4ee5\u592a\u574a\u300b\u8bd1\u8005
\n
• \u59dc\u4fe1\u5b9d HiBlock \u533a\u5757\u94fe\u793e\u533a\u53d1\u8d77\u4eba \uff0c
\n
• Tiny \u718a \u300a\u7cbe\u901a\u4ee5\u592a\u574a\u667a\u80fd\u5408\u7ea6\u5f00\u53d1\u300b\u4f5c\u8005\uff0c\u6df1\u5165\u6d45\u51fa\u533a\u5757\u94fe\u6280\u672f\u535a\u5ba2\u53d1\u8d77\u4eba
\n
• \u76d6\u65b9\u5b87 \u54e5\u4f26\u6bd4\u4e9a\u5927\u5b66\u7535\u5b50\u5de5\u7a0b\u7cfb\u535a\u58eb\uff0c\u4e13\u6ce8\u6269\u5bb9\u7814\u7a76
\n
• \u865e\u662f\u4e4e \u78e8\u94fe\u53d1\u8d77\u4eba
\n
• \u5de6\u6d2a\u658c\u300a Scrum \u7cbe\u9ad3(\u654f\u6377\u8f6c\u578b\u6307\u5357)\u300b\u8bd1\u8005
\n

\u611f\u8c22\u6240\u6709\u7684\u8bd1\u8005\u8d21\u732e\uff0c\u732e\u82b1~ \u732e\u82b1~

\u8fd9\u4efd\u6587\u6863\u65e0\u7591\u662f\u6700\u65b0\u8d28\u91cf\u6700\u597d\u7684\u4e2d\u6587\u6587\u6863\uff0c\u672c\u6587\u4ec5\u4ec5\u662f\u90e8\u5206\u6458\u8981\u548c\u76ee\u5f55\uff0c \u5b8c\u6574\u6587\u6863\u8bf7\u524d\u5f80 https://learnblockchain.cn/docs/solidity/ \u3002

\u7ffb\u8bd1\u5de5\u4f5c\u662f\u4e00\u4e2a\u6301\u7eed\u7684\u8fc7\u7a0b\uff08\u8fd9\u4efd\u6587\u6863\u76ee\u524d\u4e5f\u8fd8\u6709\u90e8\u5206\u672a\u5b8c\u6210\uff09\uff0c\u6211\u4eec\u70ed\u60c5\u9080\u8bf7\u70ed\u7231\u533a\u5757\u94fe\u6280\u672f\u7684\u5c0f\u4f19\u4f34\u4e00\u8d77\u53c2\u4e0e\uff0c\u6b22\u8fce\u52a0\u5165\u6211\u4eec Group\uff1a https://github.com/lbc-team\u3002

\u672c\u4e2d\u6587\u6587\u6863\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\uff0c\u82f1\u4e2d\u76f4\u8bd1\uff0c\u4f46\u6709\u65f6\u4e3a\u4e86\u66f4\u597d\u7684\u7406\u89e3\u4e5f\u4f1a\u4f7f\u7528\u610f\u8bd1\uff0c\u5982\u9700\u8f6c\u8f7d\u8bf7\u8054\u7cfb Tiny \u718a\uff08\u5fae\u4fe1\uff1axlbxiong \uff09.

Solidity \u8bed\u8a00\u7b80\u4ecb \u53ca \u6587\u6863\u76ee\u5f55

Solidity \u662f\u4e00\u95e8\u9762\u5411\u5408\u7ea6\u7684\u3001\u4e3a\u5b9e\u73b0\u667a\u80fd\u5408\u7ea6\u800c\u521b\u5efa\u7684\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00\u3002\u8fd9\u95e8\u8bed\u8a00\u53d7\u5230\u4e86 C++\uff0cPython \u548c Javascript \u8bed\u8a00\u7684\u5f71\u54cd\uff0c\u8bbe\u8ba1\u7684\u76ee\u7684\u662f\u80fd\u5728\u4ee5\u592a\u574a\u865a\u62df\u673a\uff08 EVM \uff09]\u4e0a\u8fd0\u884c\u3002

\u8981\u7406\u89e3\u667a\u80fd\u5408\u7ea6\u53ca\u865a\u62df\u673a\u662f\u600e\u4e48\u8fd0\u884c\uff0c\u63a8\u8350\u8fd9\u4e24\u7bc7\u975e\u5e38\u597d\u7684\u6587\u7ae0\u00a0\u5b8c\u5168\u7406\u89e3\u4ee5\u592a\u574a\u667a\u80fd\u5408\u7ea6\u00a0\u53ca\u00a0\u6df1\u5165\u6d45\u51fa\u4ee5\u592a\u574a\u865a\u62df\u673a

Solidity \u662f\u9759\u6001\u7c7b\u578b\u8bed\u8a00\uff0c\u652f\u6301\u7ee7\u627f\u3001\u5e93\u548c\u590d\u6742\u7684\u7528\u6237\u5b9a\u4e49\u7c7b\u578b\u7b49\u7279\u6027\uff0c \u4ee5\u4e0b\u662f\u90e8\u5206\u76ee\u5f55\u3002

\u6587\u6863\u76ee\u5f55

\n
• \n

  \u5165\u95e8\u667a\u80fd\u5408\u7ea6

  \n
  \n
  • \u7b80\u5355\u7684\u667a\u80fd\u5408\u7ea6\n
    \n
    • \u5b58\u50a8\u5408\u7ea6\uff08\u628a\u4e00\u4e2a\u6570\u636e\u4fdd\u5b58\u5230\u94fe\u4e0a\uff09
    \n
    • \u5b50\u8d27\u5e01\u5408\u7ea6\uff08 Subcurrency \uff09\u793a\u4f8b
    \n
    \n
  \n
  • \u533a\u5757\u94fe\u57fa\u7840\n
    \n
    • \u4ea4\u6613 /\u4e8b\u52a1
    \n
    • \u533a\u5757
    \n
    \n
  \n
  • \u4ee5\u592a\u574a\u865a\u62df\u673a
  \n
  \n
\n
• \n

  \u5b89\u88c5 Solidity \u7f16\u8bd1\u5668

  \n
  \n
  • \u7248\u672c
  \n
  • Remix
  \n
  • npm / Node.js
  \n
  • Docker
  \n
  • \u4e8c\u8fdb\u5236\u5305
  \n
  • \u4ece\u6e90\u4ee3\u7801\u7f16\u8bd1
  \n
  • CMake \u53c2\u6570\n
    \n
    • SMT Solvers
    \n
    \n
  \n
  • \u7248\u672c\u53f7\u5b57\u7b26\u4e32\u8be6\u89e3
  \n
  • \u7248\u672c\u4fe1\u606f\u8be6\u60c5
  \n
  \n
\n
• \n

  \u6839\u636e\u4f8b\u5b50\u5b66\u4e60 Solidity

  \n
  \n
  • \u6295\u7968\u5408\u7ea6
  \n
  • \u79d8\u5bc6\u7ade\u4ef7\uff08\u76f2\u62cd\uff09\u5408\u7ea6
  \n
  • \u5b89\u5168\u7684\u8fdc\u7a0b\u8d2d\u4e70\u5408\u7ea6
  \n
  • \u5fae\u652f\u4ed8\u901a\u9053\u5408\u7ea6
  \n
  • \u5e93\u5408\u7ea6\u4f7f\u7528
  \n
  \n
\n
• \n

  \u6df1\u5165\u7406\u89e3 Solidity

  \n
  \n
  • Solidity \u6e90\u6587\u4ef6\u7ed3\u6784\n
    \n
    • Pragmas
    \n
    • \u7248\u672c\u6807\u8bc6
    \n
    • \u5bfc\u5165\u5176\u4ed6\u6e90\u6587\u4ef6
    \n
    • \u6ce8\u91ca
    \n
    \n
  \n
  • \u5408\u7ea6\u7ed3\u6784\n
    \n
    • \u72b6\u6001\u53d8\u91cf
    \n
    • \u51fd\u6570
    \n
    • \u51fd\u6570\u00a0\u4fee\u9970\u5668 modifier
    \n
    • \u4e8b\u4ef6 Event
    \n
    • \u7ed3\u6784\u4f53
    \n
    • \u679a\u4e3e\u7c7b\u578b
    \n
    \n
  \n
  • \u7c7b\u578b\n
    \n
    • \u503c\u7c7b\u578b\n
      \n
      • \u5e03\u5c14\u7c7b\u578b
      \n
      • \u6574\u578b
      \n
      • \u5b9a\u957f\u6d6e\u70b9\u578b
      \n
      • \u5730\u5740\u7c7b\u578b Address
      \n
      • \u5408\u7ea6\u7c7b\u578b
      \n
      • \u5b9a\u957f\u5b57\u8282\u6570\u7ec4
      \n
      • \u53d8\u957f\u5b57\u8282\u6570\u7ec4
      \n
      • \u5730\u5740\u5b57\u9762\u5e38\u91cf
      \n
      • \u6709\u7406\u6570\u548c\u6574\u6570\u5b57\u9762\u5e38\u91cf
      \n
      • \u5b57\u7b26\u4e32\u5b57\u9762\u5e38\u91cf\u53ca\u7c7b\u578b
      \n
      • \u5341\u516d\u8fdb\u5236\u5b57\u9762\u5e38\u91cf
      \n
      • \u679a\u4e3e\u7c7b\u578b
      \n
      • \u51fd\u6570\u7c7b\u578b
      \n
      \n
    \n
    • \u5f15\u7528\u7c7b\u578b\n
      \n
      • \u6570\u636e\u4f4d\u7f6e
      \n
      • \u6570\u7ec4
      \n
      • \u7ed3\u6784\u4f53
      \n
      \n
    \n
    • \u6620\u5c04
    \n
    • \u6d89\u53ca LValues \u7684\u8fd0\u7b97\u7b26\n
      \n
      • delete
      \n
      \n
    \n
    • \u57fa\u672c\u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u6362\n
      \n
      • \u9690\u5f0f\u8f6c\u6362
      \n
      • \u663e\u5f0f\u8f6c\u6362
      \n
      \n
    \n
    • \u5b57\u9762\u5e38\u91cf\u4e0e\u57fa\u672c\u7c7b\u578b\u7684\u8f6c\u6362\n
      \n
      • \u6574\u578b
      \n
      • \u5b9a\u957f\u5b57\u8282\u6570\u7ec4
      \n
      • \u5730\u5740\u7c7b\u578b
      \n
      \n
    \n
    • \u7c7b\u578b\u63a8\u65ad(\u5df2\u5f03\u7528)
    \n
    \n
  \n
  • \u5355\u4f4d\u548c\u5168\u5c40\u53d8\u91cf\n
    \n
    • \u4ee5\u592a\u5e01 Ether\u00a0\u5355\u4f4d
    \n
    • \u65f6\u95f4\u5355\u4f4d
    \n
    • \u7279\u6b8a\u53d8\u91cf\u548c\u51fd\u6570\n
      \n
      • \u533a\u5757\u548c\u4ea4\u6613\u5c5e\u6027
      \n
      • ABI \u7f16\u7801\u51fd\u6570
      \n
      • \u9519\u8bef\u5904\u7406
      \n
      • \u6570\u5b66\u548c\u5bc6\u7801\u5b66\u51fd\u6570
      \n
      • \u5730\u5740\u76f8\u5173
      \n
      • \u5408\u7ea6\u76f8\u5173
      \n
      • \u7c7b\u578b\u4fe1\u606f
      \n
      \n
    \n
    \n
  \n
  • \u8868\u8fbe\u5f0f\u548c\u63a7\u5236\u7ed3\u6784\n
    \n
    • \u8f93\u5165\u53c2\u6570\u548c\u8f93\u51fa\u53c2\u6570\n
      \n
      • \u8f93\u5165\u53c2\u6570
      \n
      • \u8f93\u51fa\u53c2\u6570
      \n
      \n
    \n
    • \u63a7\u5236\u7ed3\u6784
    \n
    • \u51fd\u6570\u8c03\u7528\n
      \n
      • \u5185\u90e8\u51fd\u6570\u8c03\u7528
      \n
      • \u5916\u90e8\u51fd\u6570\u8c03\u7528
      \n
      • \u5177\u540d\u8c03\u7528\u548c\u533f\u540d\u51fd\u6570\u53c2\u6570
      \n
      • \u7701\u7565\u51fd\u6570\u53c2\u6570\u540d\u79f0
      \n
      \n
    \n
    • \u901a\u8fc7\u00a0new \u00a0\u521b\u5efa\u5408\u7ea6
    \n
    • \u8d4b\u503c\n
      \n
      • \u89e3\u6784\u8d4b\u503c\u548c\u8fd4\u56de\u591a\u503c
      \n
      • \u6570\u7ec4\u548c\u7ed3\u6784\u4f53\u7684\u590d\u6742\u6027
      \n
      \n
    \n
    • \u4f5c\u7528\u57df\u548c\u58f0\u660e
    \n
    • \u9519\u8bef\u5904\u7406\uff1aAssert, Require, Revert and Exceptions
    \n
    \n
  \n
  • \u5408\u7ea6\n
    \n
    • \u521b\u5efa\u5408\u7ea6
    \n
    • \u53ef\u89c1\u6027\u548c getter \u51fd\u6570\n
      \n
      • Getter \u51fd\u6570
      \n
      \n
    \n
    • \u51fd\u6570\u00a0\u4fee\u9970\u5668 modifier
    \n
    • Constant \u72b6\u6001\u53d8\u91cf
    \n
    • \u51fd\u6570\n
      \n
      • \u51fd\u6570\u53c2\u6570\u53ca\u8fd4\u56de\u503c
      \n
      • View \u51fd\u6570
      \n
      • Pure \u51fd\u6570
      \n
      • Fallback \u56de\u9000\u51fd\u6570
      \n
      • \u51fd\u6570\u91cd\u8f7d
      \n
      \n
    \n
    • \u4e8b\u4ef6
    \n
    • \u7ee7\u627f
    \n
    • \u62bd\u8c61\u5408\u7ea6
    \n
    • \u63a5\u53e3
    \n
    • \u5e93\n
      \n
      • \u5e93\u7684\u8c03\u7528\u4fdd\u62a4
      \n
      \n
    \n
    • Using For
    \n
    \n
  \n
  • Solidity \u6c47\u7f16\n
    \n
    • \u5185\u8054\u6c47\u7f16\n
      \n
      • \u4f8b\u5b50
      \n
      • \u8bed\u6cd5
      \n
      • \u64cd\u4f5c\u7801
      \n
      • \u5b57\u9762\u5e38\u91cf
      \n
      • \u51fd\u6570\u98ce\u683c
      \n
      • \u8bbf\u95ee\u5916\u90e8\u53d8\u91cf\u548c\u51fd\u6570
      \n
      • \u6807\u7b7e
      \n
      • \u6c47\u7f16\u5c40\u90e8\u53d8\u91cf\u58f0\u660e
      \n
      • \u8d4b\u503c
      \n
      • If
      \n
      • Switch
      \n
      • \u5faa\u73af
      \n
      • \u51fd\u6570
      \n
      • \u6ce8\u610f\u4e8b\u9879
      \n
      • Solidity \u60ef\u4f8b
      \n
      \n
    \n
    • \u72ec\u7acb\u6c47\u7f16\n
      \n
      • \u6c47\u7f16\u8bed\u6cd5
      \n
      \n
    \n
    \n
  \n
  • \u6742\u9879\n
    \n
    • \u5b58\u50a8 storage\u00a0\u4e2d\u7684\u72b6\u6001\u53d8\u91cf\u50a8\u5b58\u7ed3\u6784
    \n
    • \u5185\u5b58 memory\u00a0\u4e2d\u7684\u5b58\u50a8\u7ed3\u6784
    \n
    • \u8c03\u7528\u6570\u636e\u5b58\u50a8\u7ed3\u6784
    \n
    • \u5185\u90e8\u673a\u5236 - \u6e05\u7406\u53d8\u91cf
    \n
    • \u5185\u90e8\u673a\u5236 - \u4f18\u5316\u5668
    \n
    • \u6e90\u4ee3\u7801\u6620\u5c04
    \n
    • \u6280\u5de7\u548c\u7a8d\u95e8
    \n
    • \u901f\u67e5\u8868\n
      \n
      • \u64cd\u4f5c\u7b26\u4f18\u5148\u7ea7
      \n
      • \u5168\u5c40\u53d8\u91cf
      \n
      • \u51fd\u6570\u53ef\u89c1\u6027\u8bf4\u660e\u7b26
      \n
      • \u4fee\u6539\u5668
      \n
      • \u4fdd\u7559\u5b57
      \n
      • \u8bed\u6cd5\u8868
      \n
      \n
    \n
    \n
  \n
  • Solidity v0.5.0 \u91cd\u5927\u66f4\u65b0\n
    \n
    • \u8bed\u4e49\u53d8\u5316
    \n
    • \u8bed\u4e49\u53ca\u8bed\u6cd5\u66f4\u6539
    \n
    • \u51c6\u786e\u6027\u8981\u6c42
    \n
    • \u5f03\u7528\u5143\u7d20\n
      \n
      • \u5f03\u7528\u547d\u4ee4\u884c\u53ca JSON \u63a5\u53e3
      \n
      • \u6784\u9020\u51fd\u6570\u53d8\u66f4
      \n
      • \u5f03\u7528\u51fd\u6570
      \n
      • \u5f03\u7528\u7c7b\u578b\u8f6c\u6362
      \n
      • \u5f03\u7528\u5b57\u9762\u91cf\u53ca\u540e\u7f00
      \n
      • \u5f03\u7528\u53d8\u91cf
      \n
      • \u5f03\u7528\u8bed\u6cd5
      \n
      \n
    \n
    • \u548c\u8001\u5408\u7ea6\u8fdb\u884c\u4ea4\u4e92
    \n
    • \u4e3e\u4f8b
    \n
    \n
  \n
  \n
\n
• \n

  \u6ce8\u91ca\u63cf\u8ff0\u89c4\u8303

  \n
\n

\u6df1\u5165\u6d45\u51fa\u533a\u5757\u94fe - \u7cfb\u7edf\u5b66\u4e60\u533a\u5757\u94fe\uff0c\u5b66\u533a\u5757\u94fe\u90fd\u5728\u8fd9\u91cc\uff0c\u6253\u9020\u6700\u597d\u7684\u533a\u5757\u94fe\u6280\u672f\u535a\u5ba2\u3002

pragma solidity ^0.4.23;\n\ncontract Preservation {\n\n // public library contracts \n address public timeZone1Library;\n address public timeZone2Library;\n address public owner; \n uint storedTime;\n // Sets the function signature for delegatecall\n bytes4 constant setTimeSignature = bytes4(keccak256(\"setTime(uint256)\"));\n\n event FLAG(string b64email, string slogan);\n\n constructor(address _timeZone1LibraryAddress, address _timeZone2LibraryAddress) public {\n timeZone1Library = _timeZone1LibraryAddress; \n timeZone2Library = _timeZone2LibraryAddress; \n owner = msg.sender;\n }\n\n // set the time for timezone 1\n function setFirstTime(uint _timeStamp) public {\n timeZone1Library.delegatecall(setTimeSignature, _timeStamp);\n }\n\n // set the time for timezone 2\n function setSecondTime(uint _timeStamp) public {\n timeZone2Library.delegatecall(setTimeSignature, _timeStamp);\n }\n\n function CaptureTheFlag(string b64email) public{\n require (owner == msg.sender);\n emit FLAG(b64email, \"Congratulations to capture the flag!\");\n }\n}\n\n// Simple library contract to set the time\ncontract LibraryContract {\n\n // stores a timestamp \n uint storedTime; \n\n function setTime(uint _time) public {\n storedTime = _time;\n }\n}\n

\u5bf9\u4ee5\u592a\u574a\u76f8\u5173\u4e00\u7a8d\u4e0d\u901a\uff0c\u770b\u4e86\u4e0d\u5c11\u6587\u7ae0\u8fd8\u662f\u6709\u70b9\u6478\u4e0d\u7740\u5934\u8111....

\u8fd9\u662f\u533a\u5757\u94fe\u5b89\u5168\u60f3\u5173\u7684\uff0c\u60f3\u8bf7\u6559\u4e00\u4e0b\u8fd9\u6bb5\u5408\u7ea6\u4ee3\u7801\u653e\u5728 Remix \u4e0a\u7f16\u8bd1\u8fd0\u884c\u540e\u8c03\u7528CaptureTheFlag\u51fd\u6570\u524d\u6709\u4ec0\u4e48\u7ea6\u675f\u5417\uff08\u8fd9\u91cc\u7684\u76ee\u7684\u662f\u8c03\u7528\u8be5\u51fd\u6570\uff09\uff0c\u6211\u7684\u731c\u60f3\u8fd9\u91cc\u65f6\u95f4\u6233\u53ef\u80fd\u4e0euint256\u6ea2\u51fa\u6709\u5173

\u636e\u8bf4 now difficulty \u90fd\u4e0d\u592a\u5b89\u5168