ethers.js | Complete Ethereum library and wallet implementation | Cryptocurrency library
kandi X-RAY | ethers.js Summary
kandi X-RAY | ethers.js Summary
[Node.js CI] A complete Ethereum wallet implementation and utilities in JavaScript (and TypeScript).
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of ethers.js
ethers.js Key Features
ethers.js Examples and Code Snippets
import Arweave from 'arweave'
export const arweave = Arweave.init({})
export const APP_NAME = 'SOME_UNIQUE_APP_NAME'
import { useState, useContext } from 'react'
import { MainContext } from '../context'
import { css } from '@emotion/css'
import Se
$ abi-types-generator ./abi-examples/fake-contract-abi.json --output=./generated-typings --name=fake-contract --provider=ethers
$ abi-types-generator ./abi-examples/fake-contract-abi.json --output=./generated-typings --name=fake-contract --provide
// context.js
import { createContext } from 'react'
export const MainContext = createContext()
// pages/_app.js
import '../styles/globals.css'
import { WebBundlr } from "@bundlr-network/client"
import { MainContext } from '../context'
import { useS
You probably tried to import the "hardhat" module from your config or a file imported from it. This is not possible, as Hardhat can't be initialized while its config is being defined.
const { ethers } = require("ha
import { ethers } from "ethers";
export const useContract = (address, abi) => {
try {
const provider = new ethers.providers.Web3Provider(window.ethereum);
const signer = provider.getSigner();
const contract = new ethers.C
import { ethers } from "ethers";
const provider = new ethers.providers.JsonRpcProvider();
const yourContract = new ethers.Contract(nftAddress, NFT.abi, provider);
const [nftAddress, se
import { ethers } from "ethers";
let price = ethers.utils.formatUnits(balance.toString(), "ether");
require("dotenv").config()
const ethers = require('ethers')
const {ChainId, Token, TokenAmount, Fetcher, Pair, Route, Trade, TradeType, Percent} =
require('@pancakeswap-libs/sdk');
const Web3 = require('web3');
const web3 = new Web3('wss:
require("@nomiclabs/hardhat-waffle");
const { ethers } = require("hardhat");
contract Verifier {
function recoverAddr(bytes32 msgHash, uint8 v, bytes32 r, bytes32 s) returns (address) {
return ecrecover(msgHash, v, r, s);
}
function isSigned(address _addr, bytes32 msgHash, uint8 v, bytes32 r, b
Community Discussions
Trending Discussions on ethers.js
QUESTION
What is the recommended way to call the Solidity fallback() function with Ethers.js ? https://docs.soliditylang.org/en/v0.8.0/contracts.html#fallback-function
...ANSWER
Answered 2021-Apr-22 at 13:37You can send an empty transaction
QUESTION
Here is the smart contract, written in vyper, to be tested
...ANSWER
Answered 2021-Apr-16 at 08:01You can use the overrides
parameter. It's used after all contract function arguments.
In your case, the contract function has 0 arguments so the overrides
is on position 1.
QUESTION
Hyperledger sawtooth uses secp256k1 ECDSA to sign transactions: https://sawtooth.hyperledger.org/docs/core/releases/1.2.5/_autogen/txn_submit_tutorial.html?highlight=transaction%20sign
And aparently ethereum uses the same type of signature: https://hackernoon.com/a-closer-look-at-ethereum-signatures-5784c14abecc
Thus, it would seem that because Metamask is used with Ethereum it would also work with sawtooth. However, I haven't found examples of this, and although I've tried signing transactions with web3.js and ethers.js with Metamask those signatures get rejected by Sawtooth.
...ANSWER
Answered 2020-Nov-03 at 15:45It's possible, this is an example I made using web3:0.20.7: https://github.com/le99/sawtooth-with-metamask-signatures/blob/master/src/App.js
The important function is onClick()
QUESTION
I'm trying to validate a signed message using a smart contract running on the TRON network. I've tried a few different methods but all failed:
Based on this article I've deployed the following smart contract:
...ANSWER
Answered 2020-Jun-07 at 20:57I got it.
The smart contract code:
QUESTION
I am trying to use Ether JS in my Flutter application. I know that it is not directly supported and even the existing implementations are not really well documented.
Is there any way I can use this library in my Flutter application for Android and iOS? Any other alternative suggestion is also welcome.
I have tried js.dart but could not figure out how to use it. I am not even sure if it is the right choice for this scenario.
I have also tried Flutter WebView Plugin.
...ANSWER
Answered 2018-Sep-14 at 10:59Honestly, if you're new to Flutter, Dart, and JS you are going to have some trouble with this unless you're willing to invest a fair amount of time. It does depend on what exactly you're trying to make with the Ether JS library, but in general you're going to have a hard time integrating it with flutter. There is an Ethereum package but it seems much narrower in scope than the ether.js library you've been looking at - it mostly seems focused on communication with the RPC api rather than dealing with wallets etc.
If you're dead set on using Flutter, your best bet would be to use Android & iOS specific libraries to do the actual ethereum stuff and to communicate through Platform Channels to a common api in your dart code. This could be a significant undertaking depending on how much of the API you need to expose, especially for someone new to flutter/dart and possibly to android/ios development as well. This will be much more performant than communicating back and forth with javascript running in a webview though, and realistically probably easier to code as well because flutter doesn't really have any good mechanisms for calling js code right now.
There is another option - to use a different client UI framework entirely. React native might do everything you need and has the advantage of being in Javascript so it can most likely integrate the Ether.js library easily, although I can't guarantee that it will actually fully support the ether.js library (its runtime might not have the necessary crypto extensions for example).
QUESTION
I have 2 ERC20 tokens. The contract are designed as standard ERC20. Here are the 2 tokens to take as an example -
...ANSWER
Answered 2019-Oct-02 at 04:09I found out the solution to implement this using ethers.js -
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