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Security · hard

49. Security review checklist for wallet apps

Auditing a mobile wallet before release.

A pre-release security pass should verify: secrets never logged or stored unencrypted, all signing requests show full transaction details before approval, deep links validate their payload before acting, and dependencies are pinned and audited for known vulnerabilities.

function sanitizeForLog(obj: Record<string, unknown>): Record<string, unknown> {
  const redactedKeys = new Set(["privateKey", "mnemonic", "seed", "password"]);
  return Object.fromEntries(
    Object.entries(obj).map(([k, v]) => [k, redactedKeys.has(k) ? "[redacted]" : v]),
  );
}

Certificate pinning for RPC/API calls, jailbreak/root detection as a soft warning (not a hard block, since it has false positives), and a documented incident-response plan round out a reasonably mature checklist.

Check your understanding

  1. 1. Why redact fields like privateKey before logging an object?

  2. 2. Why treat jailbreak/root detection as a soft warning rather than a hard block?

  3. 3. What should happen before a deep link's payload triggers an action?