We have a ATM Network and we want to sell and buy BTC or ETH on our ATMs, using our own switch. How can we do it?

79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798,483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 seems very random to me. I see how this point is on the curve, but how exactly was this specific point chosen to be the base point? Could other base points have worked?

I’m currently doing a research on Bitcoin and I would like to know if there is anyway to replicate double spending in the testnet or regtest? If isn’t possible is there any other type of […]

I’m trying to create a BTC transaction with one input and two outputs, one for change and one OP_RETURN to anchor data. And I’m doing all of that on my regtest backend. The raw unsigned […]

Two questions: I am confused by the term: trading partners like BTC/ETH, etc. I’m into some more of the fringe currencies, IOTA, and SAN. Bought them with Bitcoin on bitfinex, how to convert back? Seems […]

Shown in the gray area here, describing how to apply, I think, Segwit to a transaction (particularly a Bitcoin Cash tx). The last section is titled "serialized signed transaction" however it doesn’t appear to be […]

I created a brain wallet with a non standard phrase. So I have that, the private and public keys. Now this wallet app wants a 12 word recovery phrase to set up the wallet. How […]

There is something I do not understand. I have handled a few Bitcoin transactions using Android Blockchain app and imported private key. That worked and could buy/sell with btcdirect.eu (start transaction with btcdirect.eu and exchange […]

I once created a Bitcoin wallet with Electron using a hand crafted seed phrase (using the words of the valid word list that time). I now figured it was a bad idea, while it is […]