4
Can you close the wallet and switch [off] the moment you've clicked 'send'
Yes. Once the transaction is broadcast, the wallet has no further role in the processing of the transaction.
The exception would be, for example, if you use RBF and decide to instruct the wallet to up the fee. But this is a rare exception and isn't something a typical wallet would do ...
2
A SPV wallet simply can not validate unconfirmed transactions in any capacity. As you've correctly noted, the absence of having a validated UTXO means that the absolute best a SPV wallet can establish is that there might be a transaction available to confirm, but it can not determine anything about it.
Is it possible to query the Bitcoin network for the ...
2
Hardware wallets generally use a master seed from which they generate wallets for each cryptocurrency. One particular specification for this use case is BIP-44 (which builds upon BIP-32 and BIP-43).
1
what is the difference between:
bitcoin-cli getblocktemplate '{"rules": ["segwit"]}'
This implements the GBT protocol, specified in BIP21, for letting mining hardware and (in practice, mostly) pool software communicate with Bitcoin Core.
It outsources the mining computation to software/hardware external to Bitcoin Core. It is the only ...
1
I understand that sharing this number will result in an immediate loss of funds, because this looks like should enable recreating the whole HD tree. Am I wrong and why?
You're wrong. It is the hash of the seed, not the seed itself.
1
I’ve read online with regards to crypto that, as hardware wallet users, we should treat all devices, computer, mobile phone, software, exchanges/wallets, etc. as compromised.
Yes. This is the most important thing about Bitcoin.
You consider software compromised, so you only go for open source solutions and stay up to date.
You consider exchanges ...
1
This is my opinion because "safest" can be different for other people. Available hardware wallets that most of the Bitcoin users prefer using for long term (I have sorted them based on security):
Coldcard
Trezor
Bitbox
Jade
Although all these hardware wallets are secure, coldcard is at top because it's only used for bitcoin, tried and tested for ...
1
2 billion keys within one wallet ought to be enough for everyone.
There haven't been even that many transactions in all of Bitcoin's history.
1
In the context of multsig scripts, the sender should be the one actually including the M of N multsig script in the transaction. But because many senders willing to send to a multsig script would bear the high transaction costs due to increase in transaction size, we use P2SH of a script.
So, what the network doing is that it is shifting the cost from the ...
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