New so new to Bitcoin
Stack Exchange - Bitcoin
by Harold Vickroy
2d ago
I am you very new to bitcoin and I have been a nice investment and I've made a great profit my problem is I get to the point for cashing out and I'm punching in the wallet address and I'm still not able to get my money from Bitcoin ..read more
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Running Bitcoind - prerequisites
Stack Exchange - Bitcoin
by Jack
2d ago
Do I need to install the Bitcoin GUI and download the entire blockchain before being able to run bitcoind? The instructions ask us to directly run bitcoind -daemon , will this start downloading the blockchain in the back end https://bitcoin.org/en/full-node#mac-os-x-yosemite-1010x ..read more
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Monitoring a sequence of bitcoin transactions
Stack Exchange - Bitcoin
by gatinueta
2d ago
Me and a person I met on the internet have agreed to a sequence of two btc transactions, but neither of us trusts the other party. We would like to hire a person to monitor the sequence on the blockchain for a fee. The idea is we both deposit an amount in this person's wallet. After the transactions have completed, this deposit is paid back to both parties. Is this a good idea to resolve the "trust stalemate". Could it be resolved automatically using a smart contract? How do we find a trusted third party that would do this for us for about 50 ..read more
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How would mining pools prevent fake hash rates from quantum computers?
Stack Exchange - Bitcoin
by R. S.
2d ago
This question is related to other two: quora - How do mining pools prevent fake hash rates? reddit - How do mining pools prevent fake hashrates? The answers are far from being useful. For example, One answer is: They count the shares you found, not your hashrate. It is well know Grover's algorithm can be used to attack SHA256 (read Applying Grover's Algorithm to Hash Functions A Software Perspective). In practice, quantum computer hardwares are still slow and we expect they will beat classical ones in bitcoin mining in the not-too-distant future. So why there is no way yet to prevent a quant ..read more
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Explain the importance of Bitcoin Hash Rate using cpuminer
Stack Exchange - Bitcoin
by R. S.
2d ago
I need thoroughly explanations about Bitcoin Hash Rate beyond the trivial ones like: "Hashrate" refers to the total combined computational power that is being used to mine and process transactions on a Proof-of-Work blockchain. I will use two cpuminer functions to formulate my question: share_result and applog. (applog is called by share_result, so it is importante to include it here.) (look the functions at the bottom and then return to the question) I have tried to understand the code but I haven't found any explanation where the variable hashrate will be used. Please, explain this detail ..read more
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Which SIGHASH type we have to append at the end of the trimmed transaction in OP_CHECKSIG
Stack Exchange - Bitcoin
by lladane
2d ago
how to know which sighash type we have to append to the trimmed transaction at the time of input scripts verification, take referance from the below example { "version": 2, "locktime": 0, "vin": [ { "txid": "f7268fdc3dd4ab2ce606a9857f321f9c9d94a7cc4ca7d31db481938ce222403e", "vout": 28, "prevout": { "scriptpubkey": "76a9145ae0dedcb9a96b8d4310e4ff137a22e0233258e988ac", "scriptpubkey_asm": "OP_DUP OP_HASH160 OP_PUSHBYTES_20 5ae0dedcb9a96b8d4310e4ff137a22e0233258e9 OP_EQUALVERIFY OP_CHECKSIG", "scriptpubkey_type": "p2pkh", "scriptpubkey_address": "19HXCYbrynpvTMYkQoneBgo3xEnXPFDd4z", "value": 1506 ..read more
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In what order is the blockheader hashed?
Stack Exchange - Bitcoin
by zman
2d ago
In what order are the hash of the previous block, the root of the merkle and the nonce hashed to produce the hash of the next bitcoin block ..read more
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Can a 51% attack be triggered by any other of these 7 strategies? (and with a quantum computer?)
Stack Exchange - Bitcoin
by R. S.
2d ago
(I think this question will be blocked for being not specific, so help me edit it, thanks) (I will present Facts [1] and Facts [2] which will help organize my ideas before my question) Facts [1]: (the following information is common sense) One possible attack is: (reproducing the words in the blog braiins) ...public keys are revealed when transactions are broadcasted to the mempool, even BEFORE they get added to the blockchain. If an attacker could reverse the signature and get the associated private key during this window before the transaction gets included on-chain, they could then broadca ..read more
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Make multiple addresses and send from one address to the other
Stack Exchange - Bitcoin
by user1944720
2d ago
I have a node, and I use GetNewAddress to generate a new receiving address. is it possible to transfer what's in that address to one of the other addresses I have created using GetNewAddress? Each address appears to have an "amount" property. so i assume each address has a balance. so i want to send what's in address A, over to Address B, but from the same wallet. How would I go about doing this with RPC calls? Forgive me if I don't make sense I am still learning Bitcoin RPC. Thanks so much ..read more
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Hardware wallet security
Stack Exchange - Bitcoin
by Eoin
2d ago
With a hardware wallet, when you enter your pin and seed onto the hardware wallet software, is that data stored on their servers, and potentially accessible to hackers? I know that the private key is stored on the hardware wallet, but how does the hardware wallet sign transactions without disclosing the private key to the hardware wallet software and their server ..read more
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