I have been working on my ethereum project when face with issue new contracts stops compiling with error message:
blockchain/contracts/Utils.sol:2
pragma solidity ^0.8.9;
^^^^^^^^
SyntaxError: Unexpected identifier
I simply can not create a new contract anymore. It looks like there is some break in the environment.
Have you ever face with this issue? Do you have any thoughts what is wrong here?
Hardhat config is:
import { HardhatUserConfig } from "hardhat/config";
import "#nomicfoundation/hardhat-toolbox";
const config: HardhatUserConfig = {
solidity: "0.8.9",
};
export default config;
The issue was in import in .ts file.
My current import for test is shown below:
import { expect } from "chai";
import { ethers } from "hardhat";
import { utils, BigNumber } from "ethers";
import { time, loadFixture } from "#nomicfoundation/hardhat-network-helpers";
import "../contracts/Utils.sol";
Remove import "../contracts/Utils.sol"; from import solves the issue.
It is redundant import, hardhat is able to evaluate type of the contract just by its name in the factory. The root cause though is unclear.
In Hardhat, this error occurs while running .sol Hardhat this error occurs while running .sol contract instead of .js deployment script
Related
I'm trying to work on a project with a numerous amount of files, and I thought an import object would be helpful. For example, here would be menu.ts on the top-level, which every program will reference to:
import router from "./router/index";
import controllers from "./controllers/index";
import config from "./config";
export default {
router: router,
controllers: controllers
config: config
}
This would be a sample controllers/index.ts:
import database from "./database";
import accounts from "./accounts";
import a_controller from "./a_controller";
export default {
database: database,
accounts: accounts,
a_controller: a_controller
}
Obviously, this would raise some circular dependency issues with controllers referencing to menu. This is asserted with a TypeError: cannot read property controllers of undefined error message. Is there a way to do this?
Thank you for your time.
in your case it is better to use named import, in controllers/index.ts: you can do like:
export { database } from "./database";
export { accounts } from "./accounts";
export { a_controller } from "./a_controller";
and in your menu.ts you can import them like:
import { database, accounts, a_controller } from './controller'
I use Create React App and already declare this on src/setupTests.js:
import '#testing-library/jest-dom';
import { configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
configure({ adapter: new Adapter() });
But every time I use expect(anything).toBeInTheDocument() on test file, when running the test I get:
TypeError: expect(...).toBeInTheDocument is not a function
To make sure that the setupTests.js is actually run, I try to use enzyme shallow on test file and it works. So what is the problem with jest-dom actually and how to solve it?
Solved with:
import '#testing-library/jest-dom/extend-expect';
on src/setupTests.js
It is easier to add in your jest.config.js
module.exports = {
...,
"setupFilesAfterEnv": [
"<rootDir>/jest.setup.js"
]
}
and to create jest.setup.js with the content
import '#testing-library/jest-dom'
With that you don't have to import the jest-dom in every test file
I often find packages on npm that I want to include in a Polymer3 element.
the instructions to install the package are often to use npm with something like npm install fingerprintjs2
Below I included the basic Polymer 3 elementas an example. but i get the error
Uncaught TypeError: Cannot read property 'exports' of undefined
I dont understand how I should import from https://github.com/Valve/fingerprintjs2
import {html, PolymerElement} from '#polymer/polymer/polymer-element.js';
import './node_modules/fingerprintjs2/dist/fingerprint2.min.js';
class FingerPrint extends PolymerElement {
static get template() {
return html`
<style>
:host {display: block;}
</style>
<h2>Finger Print</h2>
`;
}
ready() {
super.ready();
setTimeout(function () {
Fingerprint2.get(function (components) {
console.log(components)
})
}, 5000)
}
} window.customElements.define('finger-print', FingerPrint);
if I try to import it with
import Fingerprint2 from './node_modules/fingerprintjs2/dist/fingerprint2.min.js';
then I get the error Uncaught SyntaxError: The requested module '../fingerprintjs2/dist/fingerprint2.min.js' does not provide an export named 'default'
I also tried
import {Fingerprint2} from './node_modules/fingerprintjs2/dist/fingerprint2.min.js';
and get Uncaught SyntaxError: The requested module '../fingerprintjs2/dist/fingerprint2.min.js' does not provide an export named 'Fingerprint2'
very simple:
import Fingerprint2 from 'fingerprint2'
I'm trying to create an Electron app with Angular 6 that uses lowdb as a local database.
It's all very new to me and it's trial and error, but I don't seem to be able to figure out how to overcome the following error:
I've installed lowdb in my application by using the commands
npm install --save lowdb (edit: forgot to mention I did this already)
and
npm install --save #types/lowdb
I've created a service to communicate with this "local database".
import { Injectable } from '#angular/core';
import lowdb from 'lowdb';
import { default as FileAsync } from 'lowdb/adapters/FileAsync';
import { CurrentUserModel } from '../models/current-user';
#Injectable({
providedIn: 'root'
})
export class LowdbService {
private db: lowdb.LowdbAsync;
constructor() {
this.initDatabase();
}
set( field: string, value: any ) {
this.db.set( field, value ).write();
}
private async initDatabase() {
const adapter = new FileAsync( 'db.json' );
this.db = await lowdb( adapter );
this.db.defaults( { user: CurrentUserModel } );
}
}
But when I include the service in the constructor of a component I get errors.
ERROR in ./src/app/services/lowdb.service.ts
Module not found: Error: Can't resolve 'lowdb' in '/Users/paul/Projects/application-name/src/app/services'
ERROR in ./src/app/services/lowdb.service.ts
Module not found: Error: Can't resolve 'lowdb/adapters/FileAsync' in '/Users/paul/Projects/application-name/src/app/services'
ℹ ｢wdm｣: Failed to compile.
ERROR in src/app/services/lowdb.service.ts(2,12): error TS1192: Module '"/Users/paul/Projects/application-name/node_modules/#types/lowdb/index"' has no default export.
src/app/services/lowdb.service.ts(3,14): error TS2305: Module '"/Users/paul/Projects/application-name/node_modules/#types/lowdb/adapters/FileAsync"' has no exported member 'default'.
As far as I can see I'm doing the same as mentioned in this Github comment and this Stackoverflow comment. I can't find any more documentation though.
Can somebody help me out?
Update
Using import * as lowdb from 'lowdb' seemed to solve my initial errors. But it resulted in a few other errors. See below.
ERROR in ./node_modules/graceful-fs/polyfills.js
Module not found: Error: Can't resolve 'constants' in '/Users/paul/Projects/project-name/node_modules/graceful-fs'
ERROR in ./node_modules/graceful-fs/graceful-fs.js
Module not found: Error: Can't resolve 'fs' in '/Users/paul/Projects/project-name/node_modules/graceful-fs'
ERROR in ./node_modules/graceful-fs/fs.js
Module not found: Error: Can't resolve 'fs' in '/Users/paul/Projects/project-name/node_modules/graceful-fs'
ERROR in ./node_modules/graceful-fs/legacy-streams.js
Module not found: Error: Can't resolve 'stream' in '/Users/paul/Projects/project-name/node_modules/graceful-fs'
First of all, if you installed just #types/lowdb, that is only typings for that library, you need to install the library itself via:
npm install --save lowdb
Then, looks like there is no default export so import lowdb from 'lowdb'; also won't work. Try is like this:
import { LowdbAsync } from 'lowdb';
import * as lowdb from 'lowdb';
import * as FileAsync from 'lowdb/adapters/FileAsync';
private db: LowdbAsync<any>; // TODO provide correct schema instead of any
private async initDatabase() {
const adapter = new FileAsync('db.json');
this.db = await lowdb(adapter);
this.db.defaults({ user: any });
}
Or you can try removing those typings (as they might be outdated) and do what their docs says:
https://github.com/typicode/lowdb/tree/master/examples#browser
import low from 'lowdb'
import LocalStorage from 'lowdb/adapters/LocalStorage'
(but when you take a look at #types/lowdb, there is no such default export so again, the typings might be outdated)
As for your other issue, take a look here:
https://github.com/typicode/lowdb/issues/206#issuecomment-324884867
typicode commented on 25 Aug 2017
#DickyKwok I think it's impossible. Can you answer this, #typicode?
I confirm, to save to disk using FileSync or FileAsync adapters you need to have access to Node fs API.
Looks like you should use LocalStorage adapter instead.
Another similar issue here: How can I use node "fs" in electron within angular 5
You could also try the solution proposed in one of answers there:
https://github.com/ThorstenHans/ngx-electron
constructor(private _electronService: ElectronService) {
this.fs = this._electronService.remote.require('fs');
}
Looks like your lowdb is missing in node_modules.
try
npm install lowdb
I have imported below packages in my service, which I use for SOAP-API processing.
"autopulous-xdom": "~0.0.12"
"autopulous-xdom2jso": "^0.0.12"
I am trying to use these with below lines at top of my service.ts
import 'autopulous-xdom/xdom.js';
import 'autopulous-xdom2jso/xdom2jso.js';
import convert = xdom2jso.convert;
import {Injectable} from '#angular/core';
#Injectable()
export class SoapService {
constructor() {}
}
I get no errors on compiling and building. But while running the application in browser, I get below error.
Has anyone worked with xdom2jso and xdom? Please help.
I got no responses and all I could do was fork and raise a PR myself into autopulous-xdom2jso.
See my fix here: https://github.com/autopulous/xdom2jso/pull/2