如何将Web 3 js导入到Ionic/Angular项目中?

nr9pn0ug  于 2023-02-06  发布在  Ionic
关注(0)|答案(1)|浏览(194)

我已经尝试将Web3安装到我的Ionicv4项目中有一段时间了。当我为项目提供服务时,它总是抛出错误。
这是我目前所拥有的。我使用

npm install --save web3

这就是使用它的服务的样子,非常简单,仅用于测试。

import { Injectable } from '@angular/core';
import Web3 from 'web3';

@Injectable({
  providedIn: 'root'
})
export class Web3Service {

  constructor() { }

  web3 = new Web3(new Web3.providers.HttpProvider('https://ropsten.infura.io/v3/INFURA_API_KEY_HERE')); // removed api key for obvious reasons

  logThings() {
    console.log(this.web3);
  }
}

下面是我的package.json的外观:

{
  "name": "webb3",
  "version": "0.0.1",
  "author": "Ionic Framework",
  "homepage": "https://ionicframework.com/",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/common": "^7.2.2",
    "@angular/core": "^7.2.2",
    "@angular/forms": "^7.2.2",
    "@angular/http": "^7.2.2",
    "@angular/platform-browser": "^7.2.2",
    "@angular/platform-browser-dynamic": "^7.2.2",
    "@angular/router": "^7.2.2",
    "@ionic-native/core": "^5.0.0",
    "@ionic-native/splash-screen": "^5.0.0",
    "@ionic-native/status-bar": "^5.0.0",
    "@ionic/angular": "^4.0.0",
    "@ionic/pro": "2.0.4",
    "core-js": "^2.5.4",
    "rxjs": "~6.3.3",
    "web3": "^1.0.0-beta.39",
    "zone.js": "~0.8.29"
  },
  "devDependencies": {
    "@angular-devkit/architect": "~0.12.3",
    "@angular-devkit/build-angular": "~0.12.3",
    "@angular-devkit/core": "~7.2.3",
    "@angular-devkit/schematics": "~7.2.3",
    "@angular/cli": "~7.2.3",
    "@angular/compiler": "~7.2.2",
    "@angular/compiler-cli": "~7.2.2",
    "@angular/language-service": "~7.2.2",
    "@ionic/angular-toolkit": "~1.2.0",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^10.12.18",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.1.4",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~8.0.0",
    "tslint": "~5.12.0",
    "typescript": "~3.1.6"
  },
  "description": "An Ionic project"
}

以下是我得到的错误:

[ng] ERROR in node_modules/web3-bzz/types/index.d.ts(28,27): error TS2580: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i @types/node`.
[ng] node_modules/web3-bzz/types/index.d.ts(30,60): error TS2580: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i @types/node`.
[ng] node_modules/web3-core/types/index.d.ts(20,22): error TS2307: Cannot find module 'net'.
[ng] node_modules/web3-providers/types/index.d.ts(23,22): error TS2307: Cannot find module 'net'.
[ng] node_modules/web3-utils/types/index.d.ts(71,54): error TS2580: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i @types/node`.
[ng] node_modules/web3-utils/types/index.d.ts(72,48): error TS2580: Cannot find name 'Buffer'. Do you need to install type definitions for node? Try `npm i @types/node`.
[ng] node_modules/web3/types/index.d.ts(22,22): error TS2307: Cannot find module 'net'.
[ng]
[ng] i 「wdm」: Failed to compile.

我不太确定我做错了什么所以任何帮助都是非常感谢的,谢谢.

093gszye

093gszye1#

查看GitHub评论获取临时修复:
这是一个与angular-cli-files默认browser.js设置不匹配的问题,您必须修复这个问题,才能使web 3在angular应用程序上工作。
如果您在angular应用的根目录下创建了一个名为patch.js的文件,然后在package.json中的scripts下添加"postinstall": "node patch.js"。再次运行npm install,然后ng build将正常工作,您应该不会再遇到任何问题。
这是因为我们必须将/angular-cli-files/models/webpack-configs/browser.js中的node:false替换为'node: {crypto: true, stream: true}',以允许web 3使用Angular (因为他们强制node: false)。
在web3.js的下一个版本中将部署对此的永久性修复;PR为:
https://github.com/ethereum/web3.js/pull/2262

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