Last updated: 4 October 2026. This page follows the EU ePrivacy Directive (article 5(3)), the GDPR and the guidelines of the French data-protection authority (CNIL).
1. Your choice
On your first visit we ask whether you accept optional audience measurement. Refusing is as easy as accepting, and nothing optional runs until you say yes. You can change your mind at any time:
2. Strictly necessary (no consent needed)
These make the Service work and cannot be switched off. They are never used for advertising.
| Name | Type | Purpose | Lifetime |
|---|---|---|---|
| artsunami_auth | Cookie (first party, HttpOnly) | Keeps you signed in after you sign the sign-in message with your wallet. | 30 days |
| artsunami_sessions | Cookie (first party, HttpOnly) | Remembers the wallets signed in on this browser so you can switch between them. | 30 days |
| artsunami_consent | Cookie + local storage (first party) | Remembers your cookie choice so we do not ask on every page. | 6 months after a refusal, 13 months after an acceptance |
| Drafts and projects | Local storage and IndexedDB | Your drafts, layers and settings, kept on your device only (unless you turn on draft sync). | Until you delete them (Settings, Wipe local data) |
| Preferences | Local storage | Theme, last used wallet, dismissed tips, profile cache. | Until you clear your browser data |
| Offline cache | Service worker cache | Lets the app open quickly and show the offline screen. | Replaced at each new version |
3. Audience measurement
- Without your consent, artsunami counts visits on its own servers without storing anything on your device: pages viewed, the site you came from (domain only), country, device type and browser family. Unique visits are estimated with a one-way fingerprint of the connection that is rebuilt from a new random key every day, so a visitor cannot be followed from one day to the next. Your IP address is never stored.
- With your consent, we also keep a random identifier (
artsunami:vid) in your browser for up to 13 months, to tell first visits from returning ones. It is not linked to your wallet, your name or any other site. - Measurement is done by artsunami itself. No Google Analytics, no advertising network, no data sold. Statistics are kept in aggregated form for 13 months, then deleted.
- If your browser sends Do Not Track or Global Privacy Control, we never set the identifier, even after an acceptance.
4. Wallets and third parties
Connecting a wallet happens between your browser and the wallet you choose (browser extension or Coinbase / Base smart wallet). We switched off the Coinbase SDK telemetry, so it loads no analytics script on artsunami. A wallet you open in a pop-up window (for example keys.coinbase.com) applies its own cookie policy. artsunami embeds no advertising, social-network or video trackers.
5. More
Details on how we process personal data, who our sub-processors are and how to exercise your rights are in the Privacy policy. Who publishes the Service: Legal notice.