Ethers For Flutter

Ethers is a dart library that connects to interact with the Ethereum blockchain and inspired by ethers.js.

Thanks to web3dart which is no longer maintained.

Installing

Add Ethers to your pubspec.yaml file:

dependencies:
ethers:

Import Ethers in files that it will be used:

import 'package:ethers/ethers.dart';

Usage

const provider =new ethers.providers.JsonRpcProvider();
// Look up the current block numberawait provider.getBlockNumber();
// 14135476// Get the balance of an account (by address or ENS name, if supported by network)final balance =await provider.getBalance("0x0000000000000000000000000000000000000000");
// { BigInt: "10478645750785322678769" }// Often you need to format the output to something more user-friendly,// such as in ether (instead of wei)
ethers.utils.formatEther(balance);
// '10478.645750785321'// If a user enters a string in an input field, you may need// to convert it from ether (as a string) to wei (as a BigNumber)
ethers.utils.parseEther("1.0");
// { BigInt: "1000000000000000000" }

Wallet

// Create a wallet instance from a mnemonic...final mnemonic ="announce room limb pattern dry unit scale effort smooth jazz weasel alcohol"final walletMnemonic =Wallet.fromMnemonic(mnemonic);
// ...or from a private keyfinal walletPrivateKey =Wallet(walletMnemonic.privateKey);
walletMnemonic.address == walletPrivateKey.address;
// true// The address as a Promise per the Signer API
walletMnemonic.getAddress()
// '0x71CB05EE1b1F506fF321Da3dac38f25c0c9ce6E1'// The address as a Promise per the Signer API
walletMnemonic.address
// '0x71CB05EE1b1F506fF321Da3dac38f25c0c9ce6E1'// The internal cryptographic components
walletMnemonic.privateKey
// '0x1da6847600b0ee25e9ad9a52abbd786dd2502fa4005dd5af9310b7cc7a3b25db'
walletMnemonic.publicKey
// '0x04b9e72dfd423bcf95b3801ac93f4392be5ff22143f9980eb78b3a860c4843bfd04829ae61cdba4b3b1978ac5fc64f5cc2f4350e35a108a9c9a92a81200a60cd64'// The wallet mnemonic
walletMnemonic.mnemonic
// {// locale: 'en',// path: "m/44'/60'/0'/0/0",// phrase: 'announce room limb pattern dry unit scale effort smooth jazz weasel alcohol'// }// Note: A wallet created with a private key does not// have a mnemonic (the derivation prevents it)
walletPrivateKey.mnemonic
// null

TODO...