dataSuffix field unused when data is null

[nikhilkumar1612]

Check existing issues

• I checked there isn't already an issue for the bug I encountered.

Viem Version

2.46.1

Current Behavior

dataSuffix field is not respected when data field is null.

import { Attribution } from "ox/erc8021";
import { createWalletClient, http, parseUnits, zeroAddress } from "viem";
import { privateKeyToAccount } from "viem/accounts"
import { base } from "viem/chains";

const main = async () => {
    const account = privateKeyToAccount("");
    const dataSuffix = Attribution.toDataSuffix({
        codes: ["my-code"]
    });

    console.log("dataSuffix: ", dataSuffix);
    const wallet = createWalletClient({
        account,
        transport: http(""),
        chain: base,
        dataSuffix
    });

    // below transaction adds dataSuffix to `data` field
    const tx = await wallet.sendTransaction({
        to: zeroAddress,
        value: parseUnits('0', 18),
        data: "0x"
    });

    // below transaction does not respect the dataSuffix field:
    // const tx1 = await wallet.sendTransaction({
    //     to: zeroAddress,
    //     value: parseUnits('0', 18),
    // });

    console.log("tx: ", tx);
}
main();

Expected Behavior

dataSuffix field should be appended to transaction's data even when data is undefined or null

Steps To Reproduce

https://gist.github.com/nikhilkumar1612/573f940083a06070adcf5eb370bbdb44

Link to Minimal Reproducible Example

https://gist.github.com/nikhilkumar1612/573f940083a06070adcf5eb370bbdb44

Anything else?

No response