Provider

The Provider lets you connect to a Fuel node (local or external) and interact with it, encapsulating common client operations in the SDK. Those operations include querying the blockchain for network, block, and transaction-related info (and more), as well as sending transactions to the blockchain.

All higher-level abstractions (e.g. Wallet, Contract) that interact with the blockchain go through the Provider, so it's used for various actions like getting a wallet's balance, deploying contracts, querying their state, etc.

import { Provider, WalletUnlocked } from 'fuels';

const FUEL_NETWORK_URL = 'http://127.0.0.1:4000/v1/graphql';

// Create the provider
const provider = await Provider.create(FUEL_NETWORK_URL);

// Querying the blockchain
const { consensusParameters } = provider.getChain();

// Create a new wallet
const wallet = WalletUnlocked.generate({ provider });

// Get the balances of the wallet (this will be empty until we have assets)
const { balances } = await wallet.getBalances();
// []

See code in context

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You can find more examples of Provider usage here.