Effective: September 3, 2026 Terms version: 2026-09-03 These Terms of Use (“Terms”) govern access to Nullark websites, interfaces, documentation, relayer services, and related software made available by the Nullark operator (collectively, the “Service”). By selecting the in-app acknowledgement or using the Service to prepare or submit a transaction, you agree to these Terms. If you disagree, do not use the Service.

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1. Eligibility

You represent that:
  • you are legally able to enter this agreement;
  • your use is lawful where you live and where you access the Service;
  • you are not subject to sanctions or restrictions that prohibit your use;
  • you act for yourself or have authority to bind the person or entity you represent.
The Service is unavailable wherever offering or using it would violate applicable law.

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2. What Nullark provides

Nullark provides self-custodial software for preparing and submitting interactions with public blockchain networks and smart contracts. Available features may include private-balance management, transaction preparation, relayer submission, recovery tools, and withdrawals. Nullark is software, not a bank, custodian, broker, exchange, investment adviser, fiduciary, money manager, or guarantor. Nullark never needs your seed phrase or private key. A relayer submitting a transaction does not take custody of your wallet or private note. Smart contracts and public networks can continue operating independently of the hosted interface. The operator may be unable to stop, reverse, recover, or modify a confirmed transaction.

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3. Self-custody and recovery

You control your wallet, signatures, recovery notes, recovery kits, note secrets, browser profile, and transaction choices. Anyone who obtains spendable recovery material may be able to move the related private balance. You are responsible for:
  • using the official site and a compatible, self-custodial wallet;
  • checking network, contract, recipient, amount, fee, and calldata before approval;
  • keeping private keys and recovery material secret and backed up;
  • verifying that a deposit is confirmed and recoverable before relying on it;
  • confirming transaction status before retrying an uncertain submission;
  • securing your device, browser, wallet, and network connection.
Loss of a key or required recovery material may cause permanent loss. The operator cannot reconstruct secrets that never reached its systems.

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4. Public transaction and privacy limits

Public blockchain records may expose addresses involved in submission or receipt, amounts or denominations, timing, contract interactions, fees, transaction status, and other protocol-required public data. Outside observers may combine these facts and infer relationships. Privacy technology hides only information designated private by its design. Network, device, wallet, infrastructure, and surrounding transaction activity can remain visible. Formal verification, audits, and tests apply only within their stated scope and are not guarantees against every bug or attack. Read Privacy boundaries before moving value.

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5. Transactions and fees

You authorize every wallet transaction or relayer request you initiate. Review all displayed values before proceeding. Transactions may require network gas, protocol fees, or relayer fees. Fees can change, quotes can expire, and failed transactions may still consume gas. A displayed estimate is not a promise of final cost, execution time, price, or success. Blockchain transactions are generally irreversible. Mistyped recipients, wrong networks, incompatible contracts, reorgs, congestion, failed relays, wallet errors, RPC errors, or compromised devices may cause delay or loss. You remain responsible for taxes, reporting, licensing, registration, and other obligations arising from your activity.

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6. Prohibited use

You may not use the Service to:
  • violate law, sanctions, court orders, or another person’s rights;
  • launder proceeds, finance prohibited activity, evade lawful controls, or conceal stolen assets;
  • commit fraud, theft, ransomware, extortion, market abuse, or unauthorized access;
  • distribute malware, attack infrastructure, overload endpoints, or interfere with other users;
  • bypass technical, access, abuse-prevention, or safety controls;
  • misrepresent your identity, authority, transaction purpose, or source of funds where disclosure is legally required;
  • help another person perform prohibited conduct.
The operator may reject, rate-limit, suspend, or block access to hosted components when reasonably needed for security, abuse prevention, legal compliance, maintenance, or protection of users. Such action may not affect an independently accessible public smart contract.

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7. Third-party services

The Service depends on public networks and may connect to wallets, RPC providers, hosting providers, relayers, explorers, and other third-party tools. Their terms, privacy practices, availability, and security apply separately. Those services remain outside Nullark’s control and carry no performance guarantee from Nullark. Links are provided for convenience. A link is not an endorsement, custody relationship, or warranty.

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8. Software and intellectual property

Nullark names, marks, site design, and original content are protected by applicable intellectual-property law. Open-source code remains governed by its published license. These Terms grant only a limited, revocable, non-transferable right to use hosted components lawfully; they do not transfer ownership. Feedback may be used without restriction or payment, provided it contains no confidential information or third-party rights.

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9. Changes, availability, and termination

The operator may modify, pause, discontinue, or restrict hosted components, supported networks, contracts, relayers, fees, or features. Availability is not guaranteed. Maintenance, attacks, regulation, provider failures, or network conditions may interrupt access. Your right to use hosted components ends immediately if you materially breach these Terms. Provisions concerning ownership, risk, disclaimers, liability, indemnity, disputes, and transaction finality survive termination.

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10. Assumption of risk

You understand and accept risks including:
  • smart-contract, cryptographic, privacy-system, and software defects;
  • wallet, browser, device, extension, dependency, supply-chain, and frontend compromise;
  • malicious or unavailable RPC providers, relayers, validators, sequencers, or infrastructure;
  • public-chain reorgs, censorship, congestion, fee volatility, forks, and finality failures;
  • loss, disclosure, corruption, or incompatibility of recovery material;
  • legal or regulatory change and differing treatment across jurisdictions;
  • incomplete privacy caused by public amounts, timing, destinations, submitters, or user behavior.
Use only value you can afford to lose and independently verify important transactions.

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11. Disclaimers

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SERVICE IS PROVIDED “AS IS” AND “AS AVAILABLE.” THE OPERATOR DISCLAIMS ALL EXPRESS, IMPLIED, AND STATUTORY WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, SECURITY, AVAILABILITY, ACCURACY, RECOVERABILITY, PRIVACY, AND FITNESS OF ANY TRANSACTION OR RESULT. No documentation, interface message, audit, test, formal theorem, or operator communication creates a warranty unless an authorized written agreement says so expressly.

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12. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE OPERATOR AND CONTRIBUTORS WILL NOT BE LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, CONSEQUENTIAL, OR PUNITIVE DAMAGES; LOST PROFITS, DATA, KEYS, RECOVERY MATERIAL, DIGITAL ASSETS, GOODWILL, OR OPPORTUNITY; OR DAMAGES CAUSED BY THIRD-PARTY SERVICES, PUBLIC NETWORKS, SMART CONTRACTS, RELAYERS, WALLETS, OR USER ERROR. THE AGGREGATE LIABILITY ARISING FROM THE SERVICE WILL NOT EXCEED THE GREATER OF (A) FEES YOU PAID DIRECTLY TO THE OPERATOR THROUGH THE SERVICE DURING THE 12 MONTHS BEFORE THE EVENT GIVING RISE TO LIABILITY OR (B) US$100. These exclusions and limits apply regardless of legal theory and even if a remedy fails its essential purpose. They apply only where lawful. Nothing here limits liability or consumer rights that applicable law forbids limiting.

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13. Indemnity

To the extent permitted by law, you will defend, indemnify, and hold harmless the operator and contributors from claims, losses, liabilities, and reasonable costs arising from your unlawful use, breach of these Terms, violation of another person’s rights, or misuse of wallet or recovery material. This clause does not apply where prohibited by consumer law.

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14. Disputes and applicable law

Applicable mandatory law governs these Terms and your use. Any dispute must be brought before a court with lawful jurisdiction over the parties and dispute. No chosen-law, mandatory-arbitration, or class-action-waiver clause applies in this version. Before filing a claim, contact Nullark and provide a concise description of the issue and requested resolution. Either party may seek urgent relief to protect assets, security, confidential material, or intellectual-property rights.

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15. Changes to these Terms

Material changes receive a new version date. The app may request acceptance again before another value-moving action. Changes apply prospectively from the stated effective date unless law requires otherwise.

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16. General terms

These Terms and incorporated policies form the agreement concerning the Service. If one provision is unenforceable, the remaining provisions continue. Failure to enforce a provision is not a waiver. You may not assign these Terms without consent; the operator may assign them as part of a lawful transfer of the Service. Headings aid reading and do not change meaning.

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17. Sensitive information

Never send seed phrases, private keys, recovery notes, wallet unlock signatures, proofs containing private material, or other spendable secrets through support or reporting channels.