Terms & Conditions

§ 1 Scope

The following Terms & Conditions, in the version valid at the time of the order, apply to all orders placed through our online shop at opensourceminers.de. Our offer is aimed at consumers and businesses; deviating terms of the orderer are not recognized unless we expressly agree to their validity in writing.

§ 2 Contracting party

The purchase contract is concluded with:
Nanohash OÜ, Ehitajate tee 110, 13517 Tallinn, Estonia.
Registration number: 17442825, VAT ID: EE102957611
Contact: support@opensourceminers.de.

§ 3 Conclusion of contract

The presentation of products in the online shop does not constitute a legally binding offer but an invitation to place an order. By clicking the “Place binding order” button you place a binding order for the goods contained in the cart.

Receipt of your order is confirmed immediately by email. This confirmation of receipt does not yet constitute acceptance of the order. A purchase contract is concluded when we accept the order by means of an explicit order confirmation, at the latest upon delivery of the goods. For payment methods with advance payment, the contract is concluded upon our acceptance of the payment.

§ 4 Prices and shipping costs

All prices are final prices and are understood including statutory VAT. Shipping costs may apply in addition to the stated prices; they are clearly shown in the cart and on the checkout page before the order is completed.

§ 5 Payment

The payment methods stated during the order process are available: card payment (Visa, Mastercard) in PayPal's card form, PayPal, Bitcoin / Lightning, stablecoins (USDC, USDT) and advance payment by bank transfer. Payment is due immediately upon conclusion of the contract or order. If an advance-payment method is selected, we deliver after receipt of payment.

For payment in Bitcoin (on-chain or Lightning) we grant a 5 % discount on the value of the goods. For payment via PayPal, including by card in PayPal's card form, we charge a fee of 3 % of the order value reflecting PayPal's fee (§ 312a (4) BGB); it is shown during the order process before you submit the order. For payment with stablecoins (USDC, USDT) the amount in US dollars equals the order value at the European Central Bank euro reference rate; it is shown before you pay, and you bear the network fee of the transfer. No fee applies to any other payment method. The Bitcoin discount and the fee under this paragraph do not apply to hashrate rentals (§ 6); there the payment methods offered apply without a fee.

If a payment is reversed outside a justified withdrawal (e.g. via chargeback), we may deactivate the associated, still-running service from the date of the reversal and decline further orders until the matter is resolved.

§ 6 Hashrate rental (rental of computing power)

In addition to selling hardware, we offer the paid rental of real Bitcoin (SHA-256) computing power (“hashrate rental”, “virtual miner”). For the agreed term we direct computing power in the amount of the ordered hashrate (TH/s) at the Bitcoin address and mining pool you provide (solo-style): if the work performed for you solves a block, the Bitcoin network pays the entire block reward directly to your address. We never receive, hold or share mining proceeds. Whether we perform the service with our own devices or with computing power sourced from professional mining is up to us; no hardware is purchased or transferred to you.

What we owe is the ordered computing power as an average over the whole term. Short-term fluctuations and interruptions (e.g. maintenance, pool restarts, load changes) and a fluctuating momentary display are inherent to mining and do not constitute a defect; the term average is decisive. If we fall short of this average for reasons we are responsible for, we extend the rental free of charge by the corresponding period or refund the undelivered fraction pro-rata, at our choice, with notice to you.

We owe no mining earnings: whether and how much you earn (block rewards) depends solely on the Bitcoin network and chance (solo mining). Any earnings flow directly to the address you provide; we are never involved in them. There is no claim for compensation of lost mining earnings due to downtime; the extension/replacement rule in the preceding paragraph applies.

Your payout address: You are solely responsible for the accuracy and control of the Bitcoin address you provide. Bitcoin payments are technically irreversible: a block reward paid by the network to the address you supplied counts as delivered, even in case of typos or lost keys. We validate the address format but cannot verify ownership. The address cannot be changed retroactively for mining work already performed; for the remaining term we are happy to switch it on request.

Start of service and right of withdrawal: The rental starts when the hashrate is provisioned after payment. By ordering you expressly request that we begin performing the service before the withdrawal period ends. If you withdraw within the 14-day withdrawal period after the rental has started, we refund the price of the unused rental time pro-rata; for the time elapsed until withdrawal you owe the proportionate price (§ 357(8) German Civil Code). The right of withdrawal expires once we have fully performed the service (§ 356(4) German Civil Code).

Term: The rental ends by itself when the booked term is over; it does not renew automatically. Before it ends we remind you by email, and you can renew at any time with a new order.

Force majeure: Events beyond our reasonable control (e.g. large-scale power or network outages, disruptions of the Bitcoin network, acts of authorities) suspend our performance obligations for their duration; the extension/replacement rule of this § 6 applies accordingly.

§ 7 Delivery

Delivery is made to the delivery address provided by you. Information on delivery times and shipping costs can be found on the Shipping & Payment page. Should a product not be available, we will inform you without delay. No delivery takes place for hashrate rental; provision is made by provisioning the hashrate (see § 6).

§ 8 Retention of title

The delivered goods remain our property until full payment has been made.

§ 9 Right of withdrawal

Consumers have a statutory right of withdrawal. The details can be found in our cancellation policy. For expiry of the withdrawal right for hashrate rental (a service), see § 6.

§ 10 Warranty / liability for defects

Statutory warranty law applies. The hardware traded is partly open-source equipment; notes on setup, firmware and operation are intended as support and do not limit your statutory rights. A warranty going beyond the statutory warranty exists only insofar as it is expressly stated.

§ 11 Liability

We are liable in accordance with statutory provisions for damage arising from injury to life, body or health, as well as in cases of intent and gross negligence. In the case of slightly negligent breach of material contractual obligations, our liability is limited to the foreseeable damage typical for the contract. Otherwise liability is excluded.

§ 12 Dispute resolution

The EU Commission provides a platform for online dispute resolution: https://ec.europa.eu/consumers/odr. We are not obliged and not willing to participate in dispute resolution proceedings before a consumer arbitration board.

§ 13 Final provisions

The law of the Republic of Estonia applies, excluding the UN Convention on Contracts for the International Sale of Goods. For consumers, this choice of law applies only insofar as it does not deprive the consumer of the protection granted by mandatory provisions of the law of the consumer’s country of habitual residence.

If the customer is a merchant, a legal entity under public law or a special fund under public law, the place of jurisdiction is, to the extent permitted by law, Tallinn, Estonia. The same applies if the customer has no general place of jurisdiction in a member state of the European Union.

Should individual provisions of these Terms be invalid, the validity of the remaining provisions remains unaffected.

As of: 11/2026