Last updated · 2026-06-19

Legal & Privacy

These terms govern your use of zkLicensing.com and the on-chain licensing protocol it exposes. The protocol itself is open code running on the Mina Protocol; this site is one front-end and keeper service for it.

1. What zkLicensing is

zkLicensing is a non-custodial software licensing protocol on the Mina Protocol blockchain. Vendors register apps as zkApp smart contracts. Buyers pay MINA into the contract; the contract issues an on-chain license tied to the buyer's Mina address. License ownership and expiry are verified by zero-knowledge proofs against the contract's published verification key.

We — the operators of zkLicensing.com — do not hold buyer funds, do not custody license keys, and do not act as a payment processor. All value transfer happens between the buyer's wallet and the vendor's zkApp on the Mina blockchain.

2. Privacy disclosure

This section covers buying, renewing, and verifying licenses on zkLicensing.com. Vendor-supplied information — name, description, optional contact email, and other listing fields — is handled under Vendor terms; it is not buyer personal data and is not in scope here.

What we do not collect

• No account, email, name, or password is required to browse, buy, or verify a license.
• Your license secret is generated locally in your browser and is never transmitted to our servers.
• We do not run analytics, ad trackers, fingerprinting scripts, or third-party tag managers on this site.

What is necessarily public

Anything written to the Mina blockchain is permanently public. This includes:

• Your Mina wallet address when you purchase, renew, or refund a license.
• The hash of your license (Poseidon(licenseSecret)), the amount paid, and the slot of purchase.
• The vendor's address and the zkApp contract address.

The license secret itself stays in your wallet's local storage. The on-chain record only contains its hash, which cannot be reversed.

What our servers see

The keeper service that orchestrates Merkle proofs and the verify endpoint receive standard HTTP request data: IP address, user-agent, requested URL, and timestamp. These are kept in rolling server logs for operational debugging (rate-limit abuse, error tracing) and are rotated automatically. We do not correlate them with wallet addresses or license hashes.

Verification requests carry only the license hash (a public value) — never the license secret. The license secret is the only thing that proves ownership; you should never paste it into our site or send it to anyone.

Cookies

We do not set tracking cookies. Wallet connection state is held by your browser extension (e.g. Auro Wallet) and never sent to our servers.

3. Vendor terms

By registering an app, vendors agree that:

• You hold the rights to license the software your zkApp represents.
• The price, refund window (14 days from purchase), and grace period (7 days past expiry) are enforced by the on-chain verification key, not by zkLicensing.com. By design, vendors cannot revoke, suspend, or alter a license once issued — only the buyer may clear their own entry by initiating a refund within the 14-day window. Disputes are an off-chain matter; on-chain access cannot be cut.
• The platform takes a 2% fee on each purchase and renewal at the moment funds are released from escrow. The remaining 98% is yours.
• You are solely accountable for the software you license through your zkApp — its lawfulness, safety, accuracy of its listing, and respect for third-party rights. Any claim, complaint, damage, or legal action arising from your software is yours to defend and resolve, not zkLicensing.com's. If your listing breaches these terms, we may remove it from the public catalog at our discretion; the on-chain zkApp will continue to operate independently — we control the catalog, not the contract.
• If you supply a contact email, we use it only to send listing-review results and license-status notices (e.g. suspension from the catalog). It is not shown to buyers and is not shared with third parties.

4. Buyer terms

• You are purchasing a license to use a third-party application. Read the vendor's own terms before buying.
• Your license is bound to the Mina address you purchased with. Treat that key like cash — loss of the key means loss of the license.
• The license secret stored by your wallet is required to prove ownership offline. If you lose it, you can still prove the license exists on-chain, but third-party apps may not accept the on-chain record alone.

5. Refund policy

A buyer can self-refund within 14 days of purchase by submitting a refund proof to the zkApp. The contract verifies the refund window with a zero-knowledge proof and returns the escrowed funds (minus the Mina transaction fee paid by the buyer to the validators). The platform 2% fee is not charged on refunded purchases.

After 14 days, the funds release to the vendor and refunds are no longer possible at the protocol level. Any further refund is between the buyer and the vendor directly.

6. Renewals and grace period

A license can be renewed at any time. If the renewal happens within 7 days of expiry (the grace period), the new one-year term extends from the original expiry slot — no buffer is lost. Outside the grace window, the new term starts at the renewal slot.

7. No warranty

zkLicensing.com and the zkLicensing protocol are provided "as is" without warranty of any kind — express, implied, or statutory — including but not limited to merchantability, fitness for a particular purpose, and non-infringement. The Mina Protocol is a third-party blockchain; we have no control over its uptime, fees, or fork behavior.

8. Limitation of liability

To the maximum extent permitted by law, the operators of zkLicensing.com are not liable for any loss of funds, loss of license access, loss of data, or consequential damages arising from: smart-contract bugs, wallet key loss, blockchain congestion or reorganization, vendor misconduct, or your inability to access this site.

9. Compliance

You are responsible for complying with the laws of your jurisdiction, including any tax obligations on payments received as a vendor or licenses purchased as a buyer. zkLicensing does not issue invoices, withhold taxes, or report transactions to tax authorities.

You may not use the protocol to license software whose sale or distribution is prohibited in your jurisdiction.

10. Changes to these terms

We may update this page as the protocol matures or as legal requirements change. Continued use of the site after an update constitutes acceptance. Material changes will be flagged with a new "Last updated" date at the top.

11. Contact

Questions about these terms, infringement claims, or a security issue: write to email us.

Buyers reporting a misbehaving app, a misleading listing, or other vendor abuse: write to email us.