signature – blockchain scanning – Bitcoin Stack Exchange

Hello friends please let me know that is there any script that can scan the entire blockchain and extract the signature values and find the match of given input.

lets suppose i give the input “eb2dsa”

script has to scan all blocks and hashes for the given input

if found print the output in a text file with hash of transaction as well as the matching signature and the public key

mining profitability – If I use a MacBook Pro to mine Bitcoin (and keep records for the blockchain), how much can I earn in 1 month?

It will be hard to find exact numbers, as GPU mining for Bitcoin has been completely obsolete since somewhere in 2013 when the first ASIC-based mining solutions appeared.

Still, I wouldn’t expect the CPU and GPU in a modern Macbook Pro to be able to mine faster than a few 100 million hashes per second. Even if we assume it can do 1 billion hashes per second, then as of january 2021, with 8 hours/day, you’d make around 0.002 USD per month in a pool (if they even permit you withdraw such a small amount). If not in a pool, it’d be exactly 0.

It won’t be worth the added cost in electricity. It won’t even be worth the cost in added wear & tear to your hardware.

There probably exists software that can do this still, but I don’t expect it to be maintained or easy to set up as it has been obsolete for so long.

blockchain – fourth word The sixth word:craft (whallet id : 164416d1-2e1b-bda3-ac63144cf522 ) This is also my wallet ID

I forgot 12 words to recover 6, now I only have 6. Give me the other 6, please. The first word:detect -Second letter:lab -The third word:fiscal -The fourth word :victory -The fifth word:shield -The sixth word:craft (whallet id : 164416d1-2e1b-bda3-ac63144cf522 ) This is also my wallet ID. I forgot the password. I have these two documents. Please return the rest to me.

How does BTC protocol guarantees that a “main” blockchain emerges?

I’m reading up on the bitcoin / blockchain technology.
Usually the part about proof of work and how to create a block is well explained.
However what is never explained is how/why the communication of blocks over the network allows for a ‘blockchain’ to converge.

Let me explain:
what if 2 miners create a new block at the same time, and broadcast it at the same time ? Roughly 50% of the nodes would have each one a new (different) block, and build on it. Now image this happens again etc. Then there is not a single blockchain that is worked on, as now miners all work on several forks. The bitcoin proposal addresses this by saying that the longest chain must be used but:

  • at a given time there could be 2 forked chains with the same size, and growing roughly at the same pace
  • knowing which chain is the longest requires to “backtrack” possibly to the begining, which means that no transaction on any chain can be “validated” as we are not sure to be on the correct chain

Are these issues adressed by the bitcoin protocol ? Basically it seems there is no proof that adding blocks in a distributed fashion over the network converges cleanly into a single chain

Starting Full Stack Engineer and Blockchain Developer School

Just wanted to stop in and say “hey” to everyone. Here’s a little info about me:

* 2018 I was diagnosed w/a severe case of degenerative disc disease and severe arthritis.
* Spent a year and 3 months trying to relieve chronic pain in my neck w/dr. visits.
* May of 2019 had no other choice but to get a disc replacement surgery C4-C5
* Scraped all the arthritis out around it, because it was an experimental piece/not a fusion.
* Took 6 months to get back to “my normal.”
* Couple months later had issues again, but in mid-lumbar and lower back.
* Found out I have same problems in both areas, plus 5 minor ones (only a matter of time)
* Couldn’t perform my duties as an Operations Manager anymore so had to leave my job
* Couple weeks later I was classified as disabled.
* Decided instead of laying around all the time to go through career reinvention and start school (which starts 1/25/21) to be a full stack engineer and blockchain developer.

I spent 7 years as a ghostwriter for several businesses and websites online from 2006-2012. Figured I would get back into it while I was in school. Looking forward to building new relationships in here and learning more about this journey I’m about to take.


blockchain – Could a miner set a maximium transaction fee

Yes, miners can choose exactly what transactions to include in their candidate blocks, including the choice to not include anything at all.

Of course, if a high fee paying transaction is available, and one miner chooses to not include it, other miners still can. This is only untrue if an entire cartel with sufficient hashrate that is actively performing a 51% attack chooses not to include a transaction – in that case, it can be censored as long as the attack lasts.

How to withdraw all Dollas in blockchain to the bank. Is anyone with experence of block chain able to help [closed]

I just swapped my bitcoins for dollars in blockchain and wondering if anyone knew how i can withdraw out of blockchain straight to bank. Thank you

blockchain – How can I generate a database/list of all non-empty bitcoin addresses with their current balance?

Stack Exchange Network

Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

blockchain – nLocketime error PUSH TRANSACTION ERROR: 64: NON-FINAL

Created nlocktime with electrum and used the time date feature which is using unix time instead of block height number for the locktime.

SO when pushing the raw tx before its time I get code 26 message non final which is fine as the time in the unix clock has not been reached.

Once the time arrived, I tried again and this time I get non-final (code 64) Why? And yes the btc from wallet being sent was confirmed at least with 1 confirmation. Here is the raw tx code. Any help would be appreciated as this is driving me crazy.


“txid”: “5b0b8137b86986fe65b2d07346d7dde9cc94ac9cd20671f5161b3bc76012a995”,
“hash”: “5b0b8137b86986fe65b2d07346d7dde9cc94ac9cd20671f5161b3bc76012a995”,
“version”: 2,
“size”: 189,
“vsize”: 189,
“weight”: 756,
“locktime”: 1610914221,
“vin”: (
“txid”: “648ab52e53c786fd4e7d3e4472342549973aa73f236437dcd6b9270e691dab56”,
“vout”: 0,
“scriptSig”: {
“asm”: “304402203a3c80d8cb01c28558269fdda6faaa7b1b963030b8867d9c0a933b9813c192c802202770970cdb704416c8fe504a9ed518537e983d2cce534fafa02046aa2181bf7a(ALL) 02cbf41593c5fdb8caaf1942e0c4f2256de0a174c85b2d05252a9053dfc08de65a”,
“hex”: “47304402203a3c80d8cb01c28558269fdda6faaa7b1b963030b8867d9c0a933b9813c192c802202770970cdb704416c8fe504a9ed518537e983d2cce534fafa02046aa2181bf7a012102cbf41593c5fdb8caaf1942e0c4f2256de0a174c85b2d05252a9053dfc08de65a”
“sequence”: 4294967293
“vout”: (
“value”: 0.00026092,
“n”: 0,
“scriptPubKey”: {
“asm”: “OP_HASH160 32d423f7e7722ed3ab0c87786e877b5f22014870 OP_EQUAL”,
“hex”: “a91432d423f7e7722ed3ab0c87786e877b5f2201487087”,
“reqSigs”: 1,
“type”: “scripthash”,
“addresses”: (