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Creating a transaction

Before you can sign and send transactions, you must first create a Transaction. The code snippet below demonstrates how to create a Transaction using the @solana/web3.js library: 
const web3 = require("@solana/web3.js");

// Define network connection
const network = "<NETWORK_URL>";
const connection = new web3.Connection(network);

// Generate keypairs
const fromKeypair = web3.Keypair.generate();
const toKeypair = web3.Keypair.generate();

// Get blockhash
const { blockhash } = await connection.getLatestBlockhash();

// Create transaction
const transaction = new web3.Transaction({
  feePayer: fromKeypair,
  recentBlockhash: blockhash,
});

// Add transaction instructions
transaction.add(
  web3.SystemProgram.transfer({
    fromPubkey: fromKeypair.publicKey,
    toPubkey: toKeypair.publicKey,
    lamports: web3.LAMPORTS_PER_SOL,
  }),
);
You can learn more about creating transactions on Solana by visiting the Solana documentation.

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Signing a transaction

To sign a transaction, call the signTransaction method on the provider, passing a Transaction as an argument. 
const signedTransaction = await window.coinbaseSolana.signTransaction(transaction);

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Sending a transaction

To send a transaction, call the sendTransaction method on the provider, passing a Transaction as an argument. 
const { signature } = await window.coinbaseSolana.sendTransaction(transaction);

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Signing and sending a transaction

To sign and send a transaction, call the signAndSendTransaction method on the provider, passing a Transaction as an argument. 
const { signature } = await window.coinbaseSolana.signAndSendTransaction(transaction);

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Signing all transactions

To sign a batch of transactions, call the signAllTransactions method on the provider, passing a list of Transactions as an argument. 
const signedTransactions = await window.coinbaseSolana.signAllTransactions(transactions);