yarn add fuels

npm install fuels --save

import { Wallet } from "fuels";
 
// Random Wallet
console.log(Wallet.generate());
 
// Using privateKey Wallet
console.log(Wallet.fromPrivateKey(PRIVATE_KEY));

import { Provider, Wallet, Contract, BigNumberish, BN } from "fuels";
import abi from "./abi.json";
 
const provider = await Provider.create('https://beta-4.fuel.network/graphql');
const wallet = Wallet.fromPrivateKey(PRIVATE_KEY, provider); // private key with coins
const contractId = "0x...";
const contract = new Contract(contractId, abi, wallet);
 
// All contract methods are available under functions
const { transactionId, value } = await contract.functions
	.foo<[BigNumberish], BN>("bar")
	.call();
 
console.log(transactionId, value);

import { Provider, ContractFactory } from "fuels";
// Byte code generated using: forc build
import bytecode from "./bytecode.bin";
 
const factory = new ContractFactory(bytecode, [], wallet);
const contract = await factory.deployContract();
 
console.log(contract.id);