@entros/pulse-sdk

Client-side SDK for the Entros Protocol. Captures behavioral biometrics (voice, motion, touch), extracts 134 statistical features, generates a Groth16 zero-knowledge proof, and submits for on-chain verification on Solana. Raw biometric data stays on-device — only derived features and the proof are transmitted.

Install

npm install @entros/pulse-sdk

Usage

Wallet-connected (primary)

The user pays a small protocol fee (~0.005 SOL) and signs the verification transaction. Re-verification is batched into a single transaction (1 wallet prompt).

import { PulseSDK } from '@entros/pulse-sdk';

const pulse = new PulseSDK({ cluster: 'devnet' });
const result = await pulse.verify(touchElement, walletAdapter, connection);

if (result.success) {
  console.log('Verified:', result.txSignature);
}

Walletless (liveness-check tier)

For non-crypto users. No wallet, no SOL required. The integrator optionally funds verifications via the relayer API.

import { PulseSDK } from '@entros/pulse-sdk';

const pulse = new PulseSDK({
  cluster: 'devnet',
  relayerUrl: 'https://api.entros.io/relay',
  wasmUrl: '/circuits/entros_hamming.wasm',
  zkeyUrl: '/circuits/entros_hamming_final.zkey',
});

const result = await pulse.verify(touchElement);

Pipeline

1. Capture: Audio (16kHz), IMU (accelerometer + gyroscope), touch (pressure + area) — event-driven, caller controls duration
2. Extract: 134 features — speaker (F0, jitter, shimmer, HNR, formants, LTAS), motion (jerk/jounce), touch (velocity/pressure)
3. Validate: Feature summaries sent to Entros validation server for server-side analysis
4. Hash: SimHash → 256-bit Temporal Fingerprint → Poseidon commitment
5. Prove: Groth16 proof that new fingerprint is within Hamming distance of previous
6. Submit: Single batched transaction via wallet (1 prompt) or relayer

Development

npm install
npm test          # 60 vitest tests (including 8-phase adversarial pen test)
npm run build     # ESM + CJS output
npm run typecheck # TypeScript strict mode

Migration history

Originally published as @iam-protocol/pulse-sdk (deprecated). Renamed during the IAM → Entros Protocol rebrand on 2026-04-25; full commit history preserved on the current repository at github.com/entros-protocol/pulse-sdk.

License

MIT