Making RPC requests

Add dependencies

The @solana/web3.js library provides a convenient RPC client Connection class that has an API for submitting RPC requests to a JSON RPC endpoint.

yarn install @solana/web3.js@1 \
             react-native-get-random-values \
             buffer

npm install @solana/web3.js@1 \
             react-native-get-random-values \
             buffer

Add polyfills

After installing, ensure you have also added these polyfills to the index.js of your React native app. These are needed in some parts of @solana/web3.js because it is originally written as a web/node library and, as a result, certain expected APIs are missing in a React Native environment.

Creating a `Connection` client

The Connection class represents a connection to a Solana RPC endpoint and provides convenient functions to make RPC requests. Construct a Connection client by passing in an RPC endpoint and an optional commitment config:

const connection = new Connection("https://api.devnet.solana.com", "confirmed");

The Connection class created can be reused throughout your application.

Usage

After creation, call various asynchronous RPC functions and receive responses from the RPC endpoint.

// `getLatestBlockhash` RPC request
const blockhash = await connection.getLatestBlockhash();

// `getBalance` RPC request
const balanceInLamports = await connection.getBalance();

// Sending a Transaction
const txSignature = await sendTransaction(tx);

View the official documentation to see the full list of available RPC functions, parameter types, and response types.

Next steps

Read the following Building transactions guide to learn how to create transactions that interact with on-chain Solana Programs.
Browse the full list of Solana RPC HTTP Methods

Recipes

General

Mobile Wallet Adapter

Solana Development

Add dependencies

Add polyfills

Creating a `Connection` client

Usage

Next steps

​Add dependencies

​Add polyfills

​Creating a Connection client

​Usage

​Next steps

Add dependencies

Add polyfills

Creating a `Connection` client

Usage

Next steps