Your contracts with third persons it's your own risks, you must refund all from your personal resources, than of course you can take any legal actions. Now, you violate your commitments for a very long time and it looks like a scam, independently of yours explanations above
Да, можно, да прокатит. Только лучше сразу обговорить, на какой адрес контора будет осуществлять возврат, в случае проблем. Так как, адрес биржи скорее всего после отправки сразу сменится и биржа не сможет разобраться в случае возврата.
How do you imagine such specification?
ASIC contains a some billions of logic cells (transistors) that interconnected in a special way to perform required operations. Usually, This architecture developed by group of high-qualified engineers and a full manufacturing process can take from 6 to 12...
There are a lot of asics for DASH (X11) was produced since 2015.
1) Baikal miners http://www.baikalminer.com/
2) Ibelink miners https://ibelink.co/
3) Pinidea miners https://shop.pinidea.io/
On your screens I see that it have 24 chips per board, but giant 900 have only 12. I suppose that it may be a new real device simply doubled chip count, hashrate and power. Therefore price is also should be about two times higher.
ADD: we can ask @BAIKAL
I replied to PM that In your transaction you send 0.0XX from first address + X.XXX from second address + X.XXXXXX from third address TO another address
Imagine that you have $1, $5, $5, $5, $10, $20 in your pocket. You need to send me $26 and you can do it by choosing several notes. Every note have an unique number it calls "inputs" in your transaction. If you select a different addresses for combine required amount you will see this addresses...
Explanation in my previous post. If you already send transaction, you can find inputs (sending addresses) in the dash blockchain explorer. https://explorer.dash.org/chain/Dash
Just put your transaction ID (you can see it in the dash core) to the search and then look to Inputs -> "From address"...
Commonly merchants are create a new address for each buyer, it helps them to determine sender without asking of sending addresses.
To solve your questions, please:
1. Open Dash a core wallet
2. open settings->options menu
3. on the "wallet" tab check "enable coin control" function
4. Then close...