Terms of Service

Last updated: April 7, 2026

Hashmarket is only a web-based front-end that helps you build and broadcast transactions to smart contracts deployed on the public Ethereum blockchain. It is not a broker, exchange, counterparty, custodian, or "house" in any trade. We do not take the other side of your transactions, hold your assets, or operate the blockchain. You interact directly with independent smart-contract code and third-party networks at your own risk. These Terms set out limitations of our role and liability. If you do not accept them, do not use the Interfaces or Technology Features.

1. Introduction

These Terms of Use describe the terms and conditions under which you, whether personally or on behalf of an entity ("you" or "your"), may use, interact with or otherwise access the Interfaces or Features made available by NT Labs Limited ("the Company," "we," "us," or "our"). These Terms of Use, together with any documents and additional terms or policies that are appended hereto or that expressly incorporate these Terms of Use by reference as well as our Privacy Policy posted on the Site (collectively, the "Terms"), are intended to form a binding agreement between you and us to the extent permitted by applicable law.

The Terms apply to (i) all content, informational functionality, and information features (the "Content Features") available on Hashmarket (the "Site") and any other site or application to which these Terms are posted (each, as applicable, an "Interface") and (ii) software and interaction paths, including the ability to connect a self-hosted wallet and send transactions to smart contracts on the Ethereum network (the "Protocol" or, together with related on-chain programs, the "Platform"), that may be available to users via an Interface (the "Technology Features" and together with the Content Features, the "Features").

If you are in a Restricted Jurisdiction (as defined below), you may not use the Site or any other Interface to access Technology Features or otherwise interact with the Protocol in any way that would violate these Terms or Applicable Law. We do not solicit, target, or direct the Technology Features or trading-related use of the Interfaces at persons located in, resident in, or subject to the laws of the United States or other Restricted Jurisdictions, and we disclaim any intent to offer any product or service where such an offer would be unlawful.

Notice: Please read the Terms carefully. By accessing, interacting with or using the Site or any other Interface (including by linking your wallet, or otherwise creating an identifier on the Site), any Interface or any Feature, you represent that you are able to enter into a binding agreement and, as such, have read, understood, and agree to be bound by the Terms, including the binding arbitration agreement and class action waiver below. If you do not agree to all of the Terms, you are not authorized to interact with, access or use any Interface or Feature.

Use of the Site, Platform or Technology Features for trading or similar activity is not directed at and must not be used by persons or entities who reside in, are located in, are incorporated in, have a registered office in, or have their principal place of business in the United States of America, United Kingdom, France, Ontario, Singapore, Poland, Thailand, Australia, Belgium, Taiwan, Crimea, the Russian Federation, Iran, Somalia, Israel, or any other Restricted Jurisdiction (any such person or entity from these jurisdictions, a "Restricted Person"). Additionally, such use is not permitted by persons or entities (i) on behalf of any Restricted Person(s) or (ii) directed, coordinated or controlled by any Restricted Person (any such person or entity also shall be considered a Restricted Person).

We make no representation that the Interfaces or Features are appropriate or available for use in your jurisdiction. You are solely responsible for compliance with local laws. There are no exceptions; therefore, if you are a Restricted Person, then do not attempt to use the Site, Platform or any of the Technology Features to trade or otherwise engage in activity prohibited by these Terms. Use of a virtual private network ("VPN") or any similar tool to attempt to circumvent the restrictions set forth herein is strictly prohibited. Any person in violation of these Terms may have access restricted, suspended, or terminated in our sole discretion. We owe no fiduciary duty, advisory duty, or duty of care beyond what is expressly stated in these Terms, and we disclaim all implied duties to the fullest extent permitted by law.

2. The Site and Features

a) Description of the Site and Features

The Site is a web interface that allows users, in a fully self-directed manner, to view information and, where enabled, to compose and submit transactions to the Ethereum blockchain directed at independently deployed smart contracts (including, where applicable, event-based contracts, "Contracts"). The Company does not operate a cryptoasset or derivatives exchange, does not match orders, and does not provide trade execution, clearing, settlement, or custody services. We have no control over the outcome, validity, or finality of your on-chain transactions.

Pricing, odds, or similar information displayed on the Site does not constitute an offer, solicitation, or recommendation by the Company to enter into any transaction. Even when the Interface responds dynamically to your input, we are not acting as your agent, broker, or representative; you alone decide whether and how to sign and broadcast transactions.

If you use a "Connect Wallet" or similar feature, your self-hosted cryptocurrency wallet ("Wallet") may transmit signed data to Ethereum or related services. In that case the Company (i) is not the party that submits transactions to the network on your behalf in the capacity of a financial intermediary, (ii) cannot guarantee delivery or inclusion of transactions in a block, (iii) never has access to and cannot control your private keys or guarantee the security of your Wallet, and (iv) does not take possession or custody of your cryptoassets except as may be expressly and narrowly stated elsewhere in these Terms (if at all). We cannot reverse blockchain transactions. Please exercise extreme caution: blockchain operations are irreversible and experimental software may fail.

We do not own or control the Protocol, the deployed Contracts, or the Ethereum network. Ethereum is, in general, open-source and permissionless; third parties may deploy competing or malicious contracts. You are solely responsible for verifying contract addresses and calldata before you sign. Network fees (gas) are non-refundable and borne by you.

We do not effectuate, facilitate or control any transactions you initiate; we are not liable for failed, delayed, front-run, sandwiched, mis-priced, or fraudulent transactions, or for loss of funds or fees.

The Company does not act as custodian, trustee, agent, intermediary, or broker. All on-chain activity is executed by you through your own Wallet. The Company does not hold user cryptoassets in connection with self-custodial wallet flows described here.

b) Your Acknowledgement Relating to the Site

You acknowledge that Content Features are for general information only. We do not warrant accuracy, completeness, or timeliness. You disclaim reliance on any Interface content and agree we are not liable for errors or omissions.

The Site or Features may be unavailable for maintenance, third-party outages, blockchain congestion, validator behavior, or other reasons beyond our reasonable control.

Nothing on the Site constitutes professional, investment, tax, or legal advice. Before making decisions, consult qualified professionals licensed in your jurisdiction. The Terms do not create fiduciary duties.

Nothing on the Site, Platform, Contracts, or Features is an invitation or inducement to acquire or dispose of any security, derivative, or regulated product where such an invitation would be unlawful. We make no representation that any on-chain activity is lawful for you. You are solely responsible for regulatory and tax compliance in your jurisdiction.

Some content may be automated or sourced from third parties and may be inaccurate. We are not an investment adviser or trading adviser.

3. Modifications

a) To the Terms

We may modify the Terms at any time. Updated Terms will be posted on the Site and other Interfaces with a revised "Last updated" date. Continued use after posting constitutes acceptance unless prohibited by law. If you do not agree, you must stop using the Interfaces and Features.

b) To the Site or Features

We may modify, suspend, or discontinue any Interface or Feature with or without notice. We are not liable for any loss arising from modification, suspension, or termination of access.

The following sections are intended to survive termination: Sections 5, 7–10 (and any other provisions that by their nature should survive).

4. Your Responsibilities, Representations & Prohibited Conduct

a) Your Representations

By using the Interfaces or Features, you represent and warrant that:

  • Of Age and Authority. You are at least 18 and, if accepting on behalf of an entity, you have authority to bind it.
  • Sanctions. You are not a sanctioned person or operating in violation of applicable sanctions or AML/CTF rules, including inclusion on lists maintained by OFAC, the EU, the UK, or similar authorities, where such representation is applicable.
  • Restricted Jurisdictions. You are not accessing Technology Features for prohibited trading activity from a jurisdiction we treat as restricted, including: comprehensive sanctions programs of the United States (including but not limited to Iran, Syria, Cuba, North Korea, Somalia, the Russian Federation, and the Crimea, Donetsk and Luhansk regions of Ukraine); Israel; the United States; the United Kingdom; France; Ontario; Singapore; Poland; Thailand; or Taiwan; and any other jurisdiction we designate as restricted ("Restricted Jurisdictions"). You agree that we may rely on your representations and are not obligated to conduct checks.
  • Wallet Configuration. You alone secure your keys, seed phrases, and devices.
  • No Circumvention. You will not use VPNs or similar tools to evade geographic or access restrictions.
  • Sophistication. You understand blockchain risks, including smart-contract bugs, phishing, MEV, and volatility.
  • Applicable Law. Your use complies with Applicable Laws (as defined below) and does not facilitate illegal activity.
  • Financial Risks. On-chain participation may result in total loss. Execution may differ from displayed prices. Leverage and experimental products magnify risk.
  • Resolution Mechanisms. We are not responsible for oracle outcomes, admin resolution, governance votes, or disputes concerning Contract settlement. You bear all dispute risk with on-chain mechanisms and other participants.

b) Prohibited Conduct

You agree not to: violate law or the Terms; abuse or attack the Interfaces; scrape without consent; provide false information; manipulate markets; harass others; reverse engineer except where law permits; or use the Features for or on behalf of persons in prohibited jurisdictions.

c) Additional Information

We may request information to verify eligibility. Failure to respond may result in suspension of access. Tax reporting is solely your obligation.

d) Feedback

Feedback you provide may be used without obligation to you. You grant the licenses stated herein with respect to Feedback and Content you submit.

e) Incentive Programs

Any points, badges, or leaderboard features have no guaranteed monetary value, confer no property rights, and may be changed or discontinued at any time.

5. Intellectual Property Rights

a) Ownership & License

The Company or its licensors own the Site, Interfaces, and related materials, subject to open-source or third-party licenses where stated. We grant you a limited, revocable, non-exclusive license to use the Interfaces as offered. Open-source and third-party components remain under their respective licenses.

b) Reciprocal License

You grant us a license to use Feedback and Content you provide for operating and improving the Interfaces, in accordance with these Terms.

6. Third Party Information or Services

Third-party services, RPC providers, indexers, wallets, and block explorers are not controlled by us. Your use of them is at your own risk and subject to their terms. We do not endorse third-party content.

7. Indemnification

To the fullest extent permitted by law, you will defend, indemnify, and hold harmless the Company and its licensors, and their respective employees, officers, directors, and representatives (the "Company Parties") from any Claims (as described in comparable industry terms) arising out of your use of the Interfaces or Features, your breach of the Terms, disputes with third parties, or your infringement of third party rights, including reasonable attorneys' fees.

8. Disclaimers and Limitations of Liability

a) Interfaces and Features

We do not guarantee uninterrupted, error-free, or secure access. You assume all risks of using experimental software and public blockchains.

b) No Warranties

THE INTERFACES AND FEATURES ARE PROVIDED "AS IS" AND "AS AVAILABLE." TO THE MAXIMUM EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.

c) Limitations of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, NEITHER THE COMPANY NOR ITS SERVICE PROVIDERS WILL BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES, OR FOR ANY LOSS OF PROFITS, DATA, OR CRYPTOASSETS, EVEN IF ADVISED OF THE POSSIBILITY. OUR AGGREGATE LIABILITY UNDER THESE TERMS SHALL NOT EXCEED ONE HUNDRED U.S. DOLLARS (US$100) OR THE MINIMUM AMOUNT ALLOWED BY APPLICABLE MANDATORY LAW, WHICHEVER IS GREATER.

9. Governing Law, Dispute Resolution and Class Action Waiver

a) Governing Law

These Terms and any dispute related thereto shall be governed by the BVI Arbitration Law and the laws of the British Virgin Islands, without regard to conflict-of-law rules that would apply another jurisdiction's laws, except as otherwise stated in this Section 9. Courts in the BVI have exclusive jurisdiction for disputes not subject to arbitration as expressly provided below, to the extent such jurisdiction is competent.

b) Dispute Resolution

Before commencing arbitration or litigation, the parties will attempt good-faith negotiation. The aggrieved party will send a written notice describing the dispute; the other party will have twenty (20) days to respond, and the parties will confer in good faith within forty-five (45) days of the initial notice.

c) Mandatory Arbitration

Any dispute arising out of or relating to the Terms, Interfaces, or Features shall be resolved by binding arbitration administered in the British Virgin Islands before a single arbitrator, under the rules of the BVI International Arbitration Centre (BVI IAC), or if unavailable, the UNCITRAL Arbitration Rules. The seat of arbitration shall be the British Virgin Islands. The language shall be English. Either party may seek provisional remedies in a court of competent jurisdiction to support arbitration.

YOU UNDERSTAND THAT BY AGREEING TO THE TERMS, EACH PARTY WAIVES THE RIGHT TO A JURY TRIAL AND TO PARTICIPATE IN A CLASS ACTION OR CLASS ARBITRATION, TO THE EXTENT PERMITTED BY LAW.

d) Class Action / Representative Claim Waiver

All arbitrations shall proceed solely on an individual basis. No class, consolidated, or representative actions are permitted, to the fullest extent allowed by law.

10. General Terms

a) Entire Agreement. The Terms constitute the entire agreement regarding the subject matter and supersede prior discussions.

b) No Relationship. Nothing creates a partnership, agency, or joint venture. You may not assign the Terms; we may assign them in connection with a reorganization or sale.

c) Waiver; Severability; Remedies. Failure to enforce a provision is not a waiver. If a provision is invalid, the remainder remains in effect. Rights and remedies are cumulative.

d) Contact. Questions or notices concerning the Features may be sent to support@hashmarket.app. We may not respond to every inquiry and no response constitutes legal, tax, or investment advice.

"Applicable Laws" means any law, rule, regulation, or governmental requirement applicable to you, us, the Interfaces, or the Features.

Hashmarket operates globally through separate legal entities. Hashmarket is a web interface to self-executing smart contracts on the public Ethereum blockchain. It is not an exchange, broker, counterparty, or custodian ("the house") and does not take the other side of user trades. The Interfaces are intended only for users who are at least twenty-one (21) years of age (21+). We do not market to or solicit U.S. persons or users in other restricted jurisdictions (including Crimea, the Russian Federation, Iran, Somalia, Israel, and other regions listed in our Terms). Nothing on this site is an offer to sell or solicitation to buy financial instruments where prohibited. Contact: support@hashmarket.app.