Terms of sale

Version 2026-08-18.

This page covers the transaction: who sells, what you get, and what happens when something goes wrong. It is not the licence. The rights you buy are set out in LICENSE.md, and where this page and that file disagree, LICENSE.md wins.

Who sells

VaCuus is written and sold by Vladimir Alyamkin (ufna.dev), the copyright holder named as Licensor in LICENSE.md.

Contact for anything on this page: ufna@ufna.dev.

What is sold

One commercial licence for VaCuus, at $69.99 per project, perpetual.

What it covers is on the licence page: one title, any team size, every 1.x update, all supported engine versions and platforms. Consoles, invoices, purchase orders, source escrow and custom terms are arranged by email instead.

Nothing is unlocked by buying. VaCuus has no licence key, no activation and no check of any kind in the plugin — the source is public and free to download whether or not you buy. What the price buys is the right to ship commercially, and the certificate is the record of that right.

Payment

Payment is in cryptocurrency, processed by Heleket. Prices are denominated in USD; the amount in coin is fixed by the payment page at the moment the invoice is created, and the invoice is valid for 12 hours.

The network fee is charged to the payer, so the invoiced amount is what settles. No card details are ever entered, and none reach this site or its seller.

What you receive, and when

The moment the payment is confirmed on-chain, three things happen automatically:

• a certificate is issued, with a licence number, your name, and the title it covers;
• it is emailed to the address you gave at checkout;
• it becomes available at a permanent link, as a web page and as a PDF.

The link does not expire, and it is safe to forward to a publisher, a platform or an accountant.

Confirmation usually takes minutes; a congested network can make it longer. You do not need to keep the page open — the email arrives either way.

The title may be a working name. Most projects are bought for long before they have a public one, so an internal or codename is fine at checkout. If the project is renamed before release, write to ufna@ufna.dev and the certificate is reissued under the new title at no charge. It stays the same licence, with the same number — only the name printed on it changes.

If something goes wrong

You paid and no certificate arrived. Write to ufna@ufna.dev with the address you paid from or the order number. Every payment is recorded, so this is a lookup, not an investigation. You will get the certificate or your money back.

You underpaid. Crypto lets a payment arrive short. No certificate is issued automatically in that case — the shortfall is reviewed by hand, and you will be asked either to top up or to take a refund.

You overpaid. The certificate is issued normally. Write in and the excess is returned.

Refunds

The certificate is a digital good, delivered immediately and irrevocably: once it is issued, the licence is granted and cannot be taken back. So a purchase is not refundable after the certificate has been issued.

Before that point — and in every case where the fault is on this side, including a payment that never produced a certificate, a duplicate payment, or a licence issued for the wrong title — a refund is made in full, on request, without argument.

The plugin is free to download, free to build with, and free to evaluate for as long as you like. Evaluate before you buy, not after; that order is the expected path and is stated as such in COMMERCIAL.md.

What is stored about you

Only what the certificate and the receipt need: the email address, the name or studio and the project title you enter, plus the order and its payment status.

No card details exist to store. Your IP address is not kept — only a salted hash of it, used to stop the checkout form being flooded.

The email address is used to send your certificate and to answer you about it. It is not used for marketing and is not passed to anyone, other than to the payment processor and the email provider to the extent that delivering the purchase requires.

Ask at ufna@ufna.dev for a copy of what is held about you, or for its deletion — noting that a record of an issued licence has to survive deletion, because it is the evidence of a right you hold.

Changes

These terms may change for future purchases. The version you accepted at checkout is the version recorded against your order and the one that governs it. The version is the date at the top of this page.