3
A will be kicked out of the mempool when that block is received, and getrawtransaction will subsequently fail for it.
3
In general, changes to policy rules are not specified in BIPs. They're up to individual clients anyway.
BIP16 is not obsolete, though its description of the standardness rules in Bitcoin Core is outdated by now. However, its consensus rules (i.e., what is valid in a block, not what will be relayed as individual transactions) are unmodified since it ...
2
USDT on the Bitcoin blockchain uses the Omni layer, which encodes data in the OP_RETURN outputs. In your transaction, the amount is 0000000006052340, which is hex for 101000000. Omni has a precision of 8, so you can divide that by 10^8 to get 1.01.
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As soon as the miner finds a solution to the proof of work.
This is as soon as they find a combination of transactions and other data for
which the hash is less than, or equal to, the current target.
Yes, the miner can choose whatever transactions maximise their return.
Blocks can contain zero transactions (other than the coinbase transaction which pays the ...
2
Impossible unless you have the private key belonging to the adress.
Your friend didn't import a few "wallets", he imported a few adresses, which makes his wallet a "Watch-Only wallet" (for the adresses that were imported.)
Is there any way i can retrieve them via finding the private keys for them to make the btc coins spendable again?
Again, if you only ...
2
How can I track to what bitcoin wallet
You cannot.
and where that wallet is registered at?
You cannot tell from the address alone,
Wallets are not "registered", anyone can download wallet software and run it on their phone or computer without registering with any organisation, without notifying any organisation, without creating an account.
Some ...
2
To illustrate this let's imagine the mempool as big vertical list of transactions.
Let this list be ordered by the feerate each transaction is paying, the higher the feerate the higher the transaction in the list.
Miners will under normal circonstances take the highest virtual MB of transaction in this list/queue.
This website is a good visualizer of this ...
2
Is there a way to ascertain a pair or more of Bitcoin addresses belong to the same wallet on the basis an address pair was used as input for a single transaction?
No.
Assuming that all inputs to a transaction are from the same wallet is often called the 'common input ownership heuristic', but it is possible to create transactions using inputs from various ...
1
In your script the previous ScriptPubKey is different.
If you want create custom script you need to sign manually the transaction, you can't use signrawtransactionwithkey. Bitcoin core sign only the standard transaction
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The QR code your friend sent you encodes a bitcoin address, which your wallet will use when creating a transaction that will pay your friend. So if you re-used the old QR code, that just means you sent BTC to the same address your friend wanted you to use in the past.
If your friend no longer has access to the private key for that old address (ie, he is ...
1
I want to understand how P2SH (no multisig) works
To understand that you first have to realize that despite what bitcoin wiki says bitcoin script evaluation is not as simple as running a Forth-like language. More precisely it is not 1) read 2) run. Instead it is more like 1) read 2) interpret (decide how to run) 3) construct the entire script based on 2 4) ...
1
Your redeemScript is incorrect. You need to push the public key to the stack by prepending it with its length. Otherwise the script interpreter will try to interpret the pubkey as opcodes, which is incorrect. Just putting the pubkey there does not work because the script interpreter does not know that those bytes are for a public key.
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