Account Recovery

import os
import requests
from datetime import datetime

def initiate_recovery(recovery_request):
    res = requests.post(
        "https://api.facesign.ai/sessions",
        headers={
            "Authorization": f"Bearer {os.environ['FACESIGN_API_KEY']}",
            "Content-Type": "application/json",
        },
        json={
            "clientReferenceId": f"recovery-{recovery_request['id']}",
            "metadata": {
                "recoveryType": recovery_request["type"],
                "requestedAt": datetime.now().isoformat(),
            },
            "flow": recovery_flow,  # The flow defined above
            "videoAIAnalysisEnabled": True,
        },
    )

    data = res.json()
    session = data["session"]
    client_secret = data["clientSecret"]

    # Track the recovery attempt
    db.recovery_attempts.create(
        id=recovery_request["id"],
        facesign_session_id=session["id"],
        status="pending",
        created_at=datetime.now(),
    )

    return client_secret["url"]

import hmac, hashlib, json, os
from flask import Flask, request, jsonify, abort
import requests

app = Flask(__name__)


def verify_facesign_signature(raw_body: bytes, signature_header: str, secret: str) -> bool:
    """HMAC-SHA256 of ``{timestamp}.{raw_body}`` must match ``v1`` in the header."""
    if not signature_header:
        return False
    try:
        parts = dict(p.split("=", 1) for p in signature_header.split(","))
    except ValueError:
        return False
    if "t" not in parts or "v1" not in parts:
        return False
    expected = hmac.new(
        secret.encode("utf-8"),
        f"{parts['t']}.".encode("utf-8") + raw_body,
        hashlib.sha256,
    ).hexdigest()
    return hmac.compare_digest(parts["v1"], expected)


@app.route("/webhooks/facesign", methods=["POST"])
def handle_webhook():
    # Read the raw body before parsing — signature is computed over the
    # exact bytes we received.
    raw_body = request.get_data()
    signature = request.headers.get("X-FaceSign-Signature")

    if not verify_facesign_signature(
        raw_body, signature, os.environ["FACESIGN_WEBHOOK_SECRET"]
    ):
        abort(401, description="Invalid signature")

    event = json.loads(raw_body)

    if event["type"] != "session.status":
        return jsonify({"received": True}), 200

    # Fetch the full session. GET /sessions/:id returns
    # {"session": ..., "clientSecret": ...} — unpack the inner session.
    session_res = requests.get(
        f"https://api.facesign.ai/sessions/{event['sessionId']}",
        headers={
            "Authorization": f"Bearer {os.environ['FACESIGN_API_KEY']}",
        },
    )
    session = session_res.json()["session"]

    # Find the recovery attempt
    recovery = db.recovery_attempts.find_by(
        facesign_session_id=event["sessionId"]
    )

    if not recovery:
        return jsonify({"received": True}), 200

    # Check recognition + liveness outcomes
    node_reports = (session.get("report") or {}).get("nodeReports") or []
    recognition_report = next(
        (r for r in node_reports if r["nodeId"] == "recognition"), None
    )
    liveness_report = next(
        (r for r in node_reports if r["nodeId"] == "liveness_known"), None
    )

    recognized = (
        recognition_report
        and recognition_report.get("outcome") == "recognized"
    )
    liveness_pass = (
        liveness_report
        and liveness_report.get("outcome") == "livenessDetected"
    )

    if session["status"] == "complete" and recognized and liveness_pass:
        # Face matched an enrolled user. The recognition report exposes
        # the enrollment profile fields (name, email, phone, company,
        # jobTitle) — not an internal FaceSign user ID. Look the customer
        # up in your own database by the enrolled email.
        matched_email = (recognition_report.get("report") or {}).get("email")
        user = (
            db.users.find_by_email(matched_email) if matched_email else None
        )

        if user:
            db.recovery_attempts.update(
                recovery["id"],
                status="approved",
                matched_user_id=user["id"],
            )

            reset_token = auth.create_password_reset_token(user["id"])
            notifications.send_reset_link(user["id"], reset_token)
        else:
            db.recovery_attempts.update(
                recovery["id"],
                status="denied",
                reason="matched_face_has_no_local_user",
            )
    else:
        db.recovery_attempts.update(
            recovery["id"],
            status="denied",
            reason="face_not_recognized" if not recognized else "liveness_failed",
        )

    return jsonify({"received": True}), 200