Spark now supports opt-in wallet privacy. When a user or transaction participant has privacy enabled, their address and associated transactions will no longer be accessible or visible through public lookups. As a result, these items may not appear in the explorer, API responses, or live data streams.

When subscribed to any channels that contain data relating to privacy enabled wallets the events will simply be skipped due to insufficient data.

import { SparkWallet } from "@buildonspark/spark-sdk";

// Create a new wallet
const { wallet, mnemonic } = await SparkWallet.initialize({
  options: { network: "REGTEST" } // or "MAINNET"
});

await wallet.setPrivacyEnabled(true);

message GossipMessageUpdateWalletSetting {
    bytes owner_identity_public_key = 1;
    optional bool private_enabled = 2;
}

Sparkscan changelog

Wallet Privacy Notice