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Solana: How can I send transactions with the new web3.js?

4 February، 2025 CRYPTOCURRENCY

Sending Transactions on Solana with Web3.js: A Step-by-Step Guide

Introduction

Web3.js is a JavaScript library for interacting with the blockchain, and Solana is one of the most popular protocols on the Solana network. In this article, we’ll walk you through the process of sending transactions to the Solana network using web3.js.

Prerequisites

Before we begin, make sure you have:

  • A Solana node (e.g., Solflare)

  • The web3.js library installed (npm install web3 or yarn add web3)

  • A wallet with a valid address on the Solana network

Step 1: Set up your wallet

Solana: How do I send transactions with new web3.js?

Create a new wallet by following these steps:

  • Go to [Solana CLI]( and create a new wallet.

  • Download the .json file for your wallet from the CLI.

  • Import the wallet data in your JavaScript project using JSON.parse().

Step 2: Set up web3.js

Create a new JavaScript file (e.g., transactionSender.js) and import the following:

const Web3 = require('web3');


const w3 = new Web3(new Web3.providers.HttpProvider(' {


  // your Solana node URL


}));

Step 3: Define your transaction parameters

Create a function to define the parameters for your transaction. This includes:

  • from: The address of the sender.

  • to: The address of the recipient.

  • amount: The amount of SOL to send.

  • gasPrice: The gas price to pay for the transaction (optional).

  • gasLimit: The gas limit for the transaction (optional).

Here’s an example:

function defineTransactionParams(from, to, amount, gasPrice = 20, gasLimit = 100000) {


  return {


    from,


    to,


    amount,


    gasPrice,


    gasLimit,


  };


}

Step 4: Create a transaction object

Create an object that contains the parameters for your transaction. You can use the defineTransactionParams() function to generate this object.

const params = defineTransactionParams('from', 'to', 1, 20);

Step 5: Send the transaction

Use the w3.eth.sendTransaction() method to send the transaction:

w3.eth.sendTransaction(params, (error, result) => {


  if (error) {


    console.error(error);


  } else {


    console.log(result);


  }


});

Example Use Case

Here’s an example of how you can use web3.js to send a simple transaction:

const Web3 = require('web3');


const w3 = new Web3(new Web3.providers.HttpProvider(' {


  // your Solana node URL


}));




function defineTransactionParams(from, to, amount) {


  return {


    from,


    to,


    amount,


    gasPrice: 20,


    gasLimit: 100000,


  };


}




const params = defineTransactionParams('fromAddress', 'toAddress', 1);




w3.eth.sendTransaction(params, (error, result) => {


  if (error) {


    console.error(error);


  } else {


    console.log(result);


  }


});

This article has covered the basics of sending transactions on Solana with web3.js. Remember to always handle errors and gas prices carefully when working with the blockchain. Happy coding!

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