// V7 Entry Point
  async createSmartAccountV7(signer: string) {
    const owner = createWalletClient({
      account: signer as Address,
      transport: http(BASE_RPC_URL),
    });

    const safeAccount = await toSafeSmartAccount({
      client: publicClient,
      entryPoint: {
        address: entryPoint07Address,
        version: '0.7',
      },
      owners: [owner],
      version: '1.4.1',
    });

    const smartAccountClient = createSmartAccountClient({
      account: safeAccount,
      chain: base,
      paymaster: paymasterClient,
      bundlerTransport: http(PIMLICO_URL),
      userOperation: {
        estimateFeesPerGas: async () =>
          (await paymasterClient.getUserOperationGasPrice()).fast,
      },
    });

    const txHash = await smartAccountClient.sendTransaction({
      to: zeroAddress,
      data: '0x',
      value: BigInt(0),
    });

    console.log('txHash', txHash);
  }