Batching transactions

Batching transactions allows sending multiple transactions in a single user operation. This can be useful to save on fees, reduce number of user confimations or to ensure that multiple transactions are executed atomically.

A typical example is to do an approval and a transfer in a single userOperation. This way, the transfer will only happen if the approval is successful.

import { smartWallet } from "thirdweb/wallets";
import { sendBatchTransaction } from "thirdweb";
import { approve, transferFrom } from "thirdweb/extensions/erc20";
 
const smartWallet = new smartWallet(config);
const smartAccount = await smartWallet.connect({
  client,
  personalAccount,
});
 
const transactions = [
  approve({
    contract,
    spender: "0x...",
    value: 100,
  }),
  transferFrom({
    contract,
    from: "0x...",
    to: "0x...",
    amount: 100,
  }),
];
 
await sendBatchTransaction({
  transactions,
  account: smartAccount,
});