Build a plain-English blockchain project blueprint for your use case, with record design, coordination, security, automation, and a practical next test.
🔥 Skip the trial-and-error
This digital guide helps you think through blockchain basics in a structured way, from transactions and hashes to consensus, keys, and automated rules. It is built for readers who want a working project brief rather than abstract theory.
A calm, practical fit for planning a first draft, reviewing assumptions, or comparing a shared-ledger idea with a conventional database.
We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.
Do you ship worldwide?
Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.
What about customs?
We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.
How long does shipping take?
Shipping time varies by location. These are our estimates:
Location
*Estimated Shipping Time
United States
5-20 Business days
Canada, Europe
5-20 Business days
Australia, New Zealand
5-20 Business days
Central & South America
5-20 Business days
Asia
5-20 Business days
Africa
5-20 Business days
*This doesn’t include our 1-3 day processing time.
Do you provide tracking information?
Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.
My tracking says “no information available at the moment”.
For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.
Will my items be sent in one package?
For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.
If you have any other questions, please contact us and we will do our best to help you out.
Returns
Order cancellation
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Refunds
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
If you did not receive the product within the guaranteed time (45 days not including 1-3 day processing) you can request a refund or a reshipment.
If you received the wrong item you can request a refund or a reshipment.
If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.
We do not issue the refund if:
Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
Your order did not arrive due to exceptional circumstances outside of our control (i.e. not cleared by customs, delayed by a natural disaster).
Other exceptional circumstances outside of our control.
*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message at support@sellvia.com
Exchanges
If for any reason you would like to exchange your product, perhaps for a different size in clothing, you must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
Refunds & Returns
Refunds, returns, and exchanges
In the event that your order arrives damaged in any way,
please email us as soon as possible at support@sellvia.com with your order number and a photo of the item’s condition.
We address these on a case-by-case basis but will try our best to work towards a satisfactory solution.
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