Privacy Mode

const settings = await wallet.setPrivacyEnabled(true);
if (!settings?.privateEnabled) {
  throw new Error("Could not confirm that privacy is enabled");
}

const settings = await wallet.getWalletSettings();
if (settings) {
  console.log("Privacy enabled:", settings.privateEnabled);
  console.log("Authorized viewer:", settings.viewerIdentityPublicKey);
}

import {
  SparkReadonlyClient,
  deriveViewerIdentityPublicKey,
} from "@buildonspark/spark-sdk";

const config = { network: "MAINNET" } as const;

// On the service: derive its public identity from its own mnemonic.
const viewerPublicKey = await deriveViewerIdentityPublicKey(config, viewerMnemonic);

// On the owner's wallet: authorize the service's public key.
const grant = await wallet.setViewerIdentityPublicKey(viewerPublicKey);
if (grant?.viewerIdentityPublicKey !== viewerPublicKey) {
  throw new Error("Could not confirm the viewer grant");
}
await wallet.setPrivacyEnabled(true);

// On the service: authenticate with the same configuration and mnemonic.
const client = await SparkReadonlyClient.createWithViewerKey(config, viewerMnemonic);
const available = await client.getAvailableBalance(ownerSparkAddress);

await wallet.clearViewerIdentityPublicKey();