solana.js

const web3 = require("@solana/web3.js");


// Getting Wallet Balance

const getWalletBalance = async (pubk) => {
    try {
        const connection = new web3.Connection(web3.clusterApiUrl("devnet"), "confirmed");
        const balance = await connection.getBalance(new web3.PublicKey(pubk));
        return balance / web3.LAMPORTS_PER_SOL;
    } catch (err) {
        console.log(err);
    }
}

// Signing the Transaction

const transferSOL = async (from, to, transferAmt) => {
    try {
        const connection = new web3.Connection(web3.clusterApiUrl("devnet"), "confirmed");
        const transaction = new web3.Transaction().add(
            web3.SystemProgram.transfer({
                fromPubkey: new web3.PublicKey(from.publicKey.toString()),
                toPubkey: new web3.PublicKey(to.publicKey.toString()),
                lamports: transferAmt * web3.LAMPORTS_PER_SOL
            })
        )
        const signature = await web3.sendAndConfirmTransaction(
            connection,
            transaction,
            [from]
        )
        return signature;
    } catch (err) {
        console.log(err);
    }
}

const airDropSol = async (wallet, transferAmt) => {
    try {
        const connection = new web3.Connection(web3.clusterApiUrl("devnet"), "confirmed");
        const fromAirDropSignature = await connection.requestAirdrop(new web3.PublicKey(wallet.publicKey.toString()), transferAmt * web3.LAMPORTS_PER_SOL);
        await connection.confirmTransaction(fromAirDropSignature);
    } catch (err) {
        console.log(err);
    }
}

module.exports = {getWalletBalance,transferSOL,airDropSol}