Google Cloud DLP Alternative for Node.js: Local In-Memory Sanitization

// [BEFORE] Google Cloud DLP (185ms latency, GCP billing, network egress)
/*
import { DlpServiceClient } from '@google-cloud/dlp';
const dlp = new DlpServiceClient();
const [response] = await dlp.deidentifyContent({
  parent: 'projects/my-project/locations/global',
  item: { value: inputPrompt },
  deidentifyConfig: { ... }
});
const sanitized = response.item.value;
*/

// [AFTER] PrivacyScrubber SDK (0.82ms latency, 0 egress, local V8 heap)
import OpenAI from 'openai';
import { sanitize, restore } from '@privacyscrubber/sdk';

const openai = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });
const inputPrompt = 'Customer Samuel Brooks (email: sbrooks@cloud.com, phone: 415-555-0182) requested tier upgrade.';

// 1. Sanitize in local RAM before LLM dispatch (<0.85ms)
const { scrubbedText, tokenMap } = sanitize(inputPrompt, {
  profile: 'General',
  detectSecrets: true
});

// 2. Invoke OpenAI safely without transmitting customer PII:
const completion = await openai.chat.completions.create({
  model: 'gpt-4o',
  messages: [{ role: 'user', content: scrubbedText }]
});
const modelOutput = completion.choices[0].message.content || '';

// 3. Deterministically restore authentic values in local RAM:
const cleartextResult = restore(modelOutput, tokenMap).restoredText;
console.log(cleartextResult);