getWeb3.js

getWeb3.js

import Web3 from 'web3';

export const getWeb3 = () =>
	new Promise( async (resolve, reject) => {
		// Modern dapp browsers...
		if (window.ethereum) {
			const web3 = new Web3(window.ethereum);
			try {
				// Request account access if needed
				await window.ethereum.enable();
				// Acccounts now exposed
				resolve(web3);
			} catch (error) {
				reject(error);
			}
		}
		// Legacy dapp browsers...
		else if (window.web3) {
			// Use Mist/MetaMask's provider.
			const web3 = window.web3;
			resolve(web3);
		}
		// Fallback to localhost; use dev console port by default...
		else {
			reject(new Error("No web3 wallet available"));
		}
	});