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Paying several hundred dollars to open and close a lightning channel seems uneconomical. This is a common argument against lightning by big blockers, I’m yet to read a valid argument against this.

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Stack Exchange - Bitcoin by Malik Mousa - 8h ago

I have a task to fork DASH coin need some and guidelines to do so. It will be very nice if anyone can share information regarding that.

I am trying to watch litecoin tutorial to take guide but having issue in setting up genesis block of dash coin.

Thanks in advance :-)

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There is a limit on how much a block can sigop (set to 80000?). There is also a limit on how much a single transaction can sigop (set to 16000?). It thus seems possible (and if it's not possible, the remaining of this question is void, but then how is it prevented?) that an attacker submits five special transactions to consume the whole block sigop limit. If such attacking transactions are using very generous fees per byte, if the miner chooses which transactions to include in a block based on fee per byte metric, it would include the attacking transactions in a block, getting relatively huge fees per byte, but not filling the block because of sigop limit. This would mean that the miner could get more in fees if it avoided attacking transactions, but the question is whether such selection avoidance is implemented by default.

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I believe address 1NDyJtNTjmwk5xPNhjgAMu4HDHigtobu1s belongs to Binance

If you look a this transaction for example https://blockchair.com/bitcoin/transaction/aa107ebc0a7f00e558048a01e327ff20e21c65356bc64a0b92eb975f067eb7aa They seem to send clients funds into this address but everytime they do that they also send a small amount into a fresh address. Here it is 3QZQ7S8v9mWWAUaSf8R4D4nzsGEMXnMjvw and after they send thoses utxo into their main cold wallet (like this tx https://blockchair.com/bitcoin/transaction/380acebfd4c1c84086b3c872cf916ef1219787b28720563b92c61a12df4ad7e3 ) and again with a little to another address etc.

Whats the point of doing that? why they just dont send into one single utxo belonging to their main address?

Thx

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What databases do bitcoin core (nodes) uses? And how looks tables structure? I can't find it anywhere...

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I'm trying to better understand hardened keys and normal keys and how the former protects the rest of and HD wallet.

Following on from the answer provided here: ELI5: What's the difference between a child-key and a hardened child-key in BIP32

I'd like to know "how an attacker would be able to work out the private key of the extended public key, and therefore get every key that can be derived from that, hardened and non-hardened." should they manage to "1) gain access to the extended public key and 2) one of the non-hardened private keys that was derived from it"

Thanks in advance!

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I want to extract output addresses from tx messages in any bitcoin pcap.

currently, i extract tx messages which it's output script starts with "0x76" or "0xA9", but i don't know how can i extract the other types of op_codes which is introduced here:

https://en.bitcoin.it/wiki/Script

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I have a question, How can I get the number of transaction confirmation by using bitcoind?

for example: https://live.blockcypher.com/btc-testnet/tx/9fd745521000d1aadb1f4857e44817c3342d02585af93c83d19dc3f3f4425594/

you can see the number of CONFIRMATIONS on that page

thank you in advance!

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I'm working on extracting output addresses from tx messages in BITCOIN packets.

Currently, I extract address from output scripts which starts with 0x76(OP_DUP) like this :

76 a9 14 6d 1d 74 58 95 6e 80 cd b4 c3 3f 1e d5 8e 91 c4 92 1a 85 d0 88

but i don't have any idea about some output scripts which start with 0xA9(OP_HASH160).

As an example, i don't know in below example, what is the raw script, which is used to generate output address?

a9 14 16 52 33 02 f2 ee d0 e0 aa 6a 4c 1d 0a 41 39 6f c2 6f 53 6e 87

How i can extract output address from output scripts which start with -xA9?

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I'm working on extracting output addresses from tx messages in BITCOIN packets.

currently, i extract address from output scripts which starts with 0x76(OP_DUP) like this :

76 a9 14 6d 1d 74 58 95 6e 80 cd b4 c3 3f 1e d5 8e 91 c4 92 1a 85 d0 88

but i don't have any idea about some output scripts which start with 0xA9(OP_HASH160).

As an example, i don't know in below example, what is the raw script, which is used to generate output address?

a9 14 16 52 33 02 f2 ee d0 e0 aa 6a 4c 1d 0a 41 39 6f c2 6f 53 6e 87

How i can extract output address from output scripts which start with -xA9?

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