Terms of Service

Acceptance of these Terms

By accessing or using cardanowall.com, you agree to these Terms of Service. If you do not agree, do not use the service.

Who operates the service

cardanowall.com is operated by an independent entrepreneur established in the Czech Republic ("CardanoWall", "we", "us", "our"). You can contact us at hello@cardanowall.com. The operator's identification and registered address are set out in the Legal Notice.

Eligibility

You must be at least 18 years old and able to enter into a binding contract to use the service.

Service description

CardanoWall is a cryptographic proof-of-existence service that anchors content hashes on the Cardano mainnet ledger under the open Label 309 standard. CardanoWall is a wrapper over that open standard — you may interact with Label 309 records via competing implementations, via the standalone command-line tool, or with no third-party service at all.

Accounts and identities

You may create one or more accounts. Sign-in methods include Google or Apple sign-in and email one-time codes. Each account holds one or more identities, and each identity is held by your own authenticators (platform passkeys, hardware security keys) together with a recovery phrase you alone control.

We never hold your secret signing keys. Your secret key material is encrypted to your own authenticators; the operator cannot read it, move your funds, or sign on your behalf, and cannot recover your keys or recovery phrase if you lose access to them.

Acceptable use

You agree not to use the service to publish:

• Content that is unlawful in your jurisdiction or in the Czech Republic.
• Harassment, threats, or targeted abuse of another person.
• Non-consensual intimate imagery.
• Content that infringes the intellectual-property rights of others.
• Mass unsolicited messaging or other automated abuse of the service.

Fees, prepaid balance, and payment

Publishing and storage are paid services. Prices are the underlying network and storage costs passed through, plus the operator's margin, and are shown to you as a quote before you confirm a publish. A quote is valid for a limited time and may be refreshed if exchange rates move before you publish.

Your account carries a prepaid balance denominated in US dollars. You top it up through our payment processor; a minimum top-up amount is shown at checkout. Publishing and uploads debit this balance. Publishing spends real ADA on the Cardano network and real storage on the Arweave network on your behalf — these are external costs we incur to fulfil your request.

Refunds and arrears

A publish that fails before it is confirmed on-chain is automatically refunded to your prepaid balance. A publish that has been confirmed on-chain is final and cannot be refunded, because the underlying transaction is irreversible.

Unused prepaid balance can be refunded on request, less any amount already spent and any unavoidable processing fees. If a payment is reversed or charged back after you have spent the funds, the resulting shortfall is recorded as arrears and further publishing is blocked until the balance is settled.

Consumer right of withdrawal

If you are a consumer in the EU, you normally have 14 days to withdraw from a distance contract. By topping up and asking us to publish immediately, you expressly request that we begin performance at once and acknowledge that the right of withdrawal is lost for each publish once it has been carried out. This does not affect your ability to request a refund of any unused balance.

Your content and its permanence

You are responsible for the content you publish and confirm that you have the right to publish it. Every successful publish results in a Cardano mainnet transaction, and the on-chain record is immutable by chain design.

We cannot rewrite, delete, or suppress an on-chain record, un-pin content stored on Arweave, or remove content held by third-party storage networks. If you wish to retract a record, the supported flow is to publish a new record that supersedes the prior one — the prior record remains on the ledger. We can remove a record from our own index and interface, and may do so where required, but this does not affect the underlying ledger or storage networks.

Reporting abuse

To report content that breaches these Terms or the law, contact hello@cardanowall.com. We will act on lawful requests within the limits of what is technically possible, which — for a confirmed on-chain or content-addressed record — is limited to removing the record from our own index and interface and suspending the responsible account.

Suspension and termination

We may suspend or terminate access where you breach these Terms or applicable law, or where a competent authority requires it. You may close your account at any time. On termination, the refund rules above apply to any unused balance.

Disclaimer of warranties

The service is provided "as is" and "as available", without warranties of any kind, express or implied, to the maximum extent permitted by applicable law. We do not warrant that the service will be uninterrupted or error-free, and we are not responsible for the availability or behaviour of the Cardano network, the Arweave network, or other third-party infrastructure.

Limitation of liability

To the maximum extent permitted by applicable law, the operator is not liable for indirect, incidental, or consequential damages, for lost data or lost access to keys, or for the permanent consequences of records you choose to publish. The operator's total aggregate liability arising out of or relating to the service is limited to the amount you paid for the service in the twelve months preceding the event giving rise to the claim. Nothing in these Terms limits any liability that cannot be limited under applicable law, including your mandatory rights as a consumer.

Indemnification

To the extent permitted by applicable law, you agree to hold the operator harmless from third-party claims arising out of content you publish or your breach of these Terms. This does not apply to the extent a claim results from the operator's own breach of law.

Governing law and disputes

These Terms are governed by the law of the Czech Republic, without prejudice to the mandatory consumer-protection rules of the country where you live. Disputes fall under the jurisdiction of the courts of the Czech Republic.

If you are a consumer, you may also pursue out-of-court dispute resolution through the Czech Trade Inspection Authority (Česká obchodní inspekce, coi.cz).

Changes to these Terms

These Terms may change. The current version is always the one published on this page, and the "last updated" date above reflects the most recent revision.

Contact

Questions about these Terms may be sent to hello@cardanowall.com.