All Questions

If you want to exchange any of the following currencies for bitcoin contact me now Ethereum Dashcoin Dodgecoin Ripple Litecoin Ecoin Bitcoin Cash Ethereum Classic Perfect money I need any of the ...

I was thinking to design a application which is not dependent on server and can directly send and receive data to and from other clients.I learned it is possible with UDP but how can new users join in ...

Does anyone know of any papers / evidence of bitcoin mining pools communicating outside of the bitcoin network for financial gain? It seems plausible in practice, but I am not sure if that has ...

As title says, I would like to know if mining with asics on aws is possible and how to do it? I don't mean profit because I don't really care and only do it for fun. Thanks!

I am making an app, and I want my users to deposit BTC coin to my address which is an exchange address (I don't have the private keys). How can I know which user made which transaction? I have a way,...

1.)If there is no central authority maintaining database how miners differentiate among other miners. 2.)Do they have there own database which have details(Mac/IP address) of neighbouring miners . 3....

So I already have the node set up on my raspberry pi. This night the transfer of the Blockchain from my laptop to the raspi's hard disk finished. Now I am waiting for the blocks to match the headers "...

My friend has a bitcoin on tradebrite.net/ website and the website is not launching or opening the page. how can he transfer his bitcoin to some working website or wallet.

I've been reading confusing information online about what the --reindex startup parameter does. This link is not clear to me. https://github.com/bitcoin/bitcoin/blob/...

I am testing a Bitcoin application, and to test the signing of transactions I use regtest with Bitcoin Core. But I have some problems, the first I have already published in a question that I still ...

I am trying to start a local test blockchain fork of peercoin. I have updated the genesis and network parameters, mined the new genesis hash and have successfully started and connected two nodes to ...

I'm studying segwit and I'm doing some experiment in regtest. I create a raw transaction with P2SH address. My Transaction data without signature is: ...

i have a question , i've searched a lot but no answers i get i've installed bitcoin core and after opening the app , it is downloading about 160GB and its gonna take two weeks to be completed my ...

We have a bitcoin node running on a server which we use to generate addresses to receive small payments from the users. We receive tons of small payments daily right now and then we are using the same ...

Based on my research every bitcoin private key (compressed or uncompressed) can have 4 different addresses: P2PKH compressed and starts with 1 P2PKH uncompressed and starts with 1 P2SH and starts ...

For example, could you have the following transaction: A --> B A --> C Where A is an input txid and index, and B and C are outputs? The reason I'm asking is because I believe with SIGHASH_SINGLE ...

I'm using the mobile "trust wallet" app, and my plan is (was?) to write down the mnemonic key and keep it in a safe place, then delete the app. Then whenever I need to receive or send money to a ...

After having finished the "Initial Block Download" I needed to reindex: [BTC_Core_Expmnt]# bitcoind -reindex -datadir=/mnt/BTC_Core_Expmnt The debug.log showed everything starting up ok; and the ...

How can I see which values bitcoind is using for eg. dbcache, or other memory and connection params ? If the value is NOT set in bitcoin.conf. Is there a bitcoin-cli command to check all the params ?

In an exchange website we just book trades in our database and just when user want to withdraw his BTC balance we make a real transaction in bitcoin network for him. Consider a scenario that a user ...

I am reading an article about how HASHSIG works, but i don't understand this: Before the signature is computed, several temporary changes are made to the transaction: The signature script of the ...

using bitcoin-qt 0.19.0.1 on mac, I type this in console: importaddress someaddress "" false After I hit enter, the output is "null". What's wrong ?

Let's say I'm in idiot was mining back in 2009 2010 I'm shure I moved 70 million in bitcoin about a year ago I got every wanna be hacker trying to or already have got all my info but to top it off ...

I am doing some tests to understand the stratum protocol. If I connect to a stratum pool (slush in this case), and check the data I receive after mining.authorize, I get the following previous hash: ...

What's the Bitcoin wallet or exchange house with the lowest fees?

I am little bit confused or not able to get the right Address Node Public key from Account XPUB. What i have Done : 1==> Get the Account XPUB [78Bytes] 2==> SHA-256 3==> SHA-256 Again 4==> ...

I am new to Bitcoin. I have downloaded the whole blockchain but I still can't access my wallets because I get a popup telling me to use prune mode. My question is: I know that I have received ...

I am reading and watching about transactions and they say a transaction's input is previous transaction's output. They all show diagrams in which these transactions are consecutive. How an account's ...

Cryptocurrency needs to be mined, thats obvious but is there anybody who has ever come accross a legit bitcoin generator?? And are they currently available??

I have an old paper wallet with Private Keys of 58 characters (all starting with a 6). These can be imported e.g. on blockchain.com, but since I still have BSV on this key, I have to import/sweep it ...

My question is - let's say a miner has control over a certain number of bitcoin addresses. He creates a block containing small transactions to and fro from these accounts ahead of time in advance and ...

I have just discovered, albeit far too late, that Cryptobridge has closed. Now, there is a lot to say about this particularly dodgy move, but I won't and I'll keep this simple: How can I access the ...

I am trying to get my wallet balance using blockchain api. On each request, I receive email about login attempt authorization from blockchain.info. How do I disable that?

I want to replicate transaction malleability to study it. I have two transactions data signed in testnet. One it's the original, ...

I've seen a transaction with 24 ancestors in thee mempool, Is there a sensible use of this? Or is a kind of spam or something else? It got mined on block 613101 $ getmempoolentry ...

I create a transaction in regtest without send it, I have transaction data signed. I modified a little bit the scriptSig in order to replicate transaction malleability, I add two operations (2 OP_DROP)...

The fingerprint is widely used across the bip174 psbt specification. This is done to speedup parsing for a signer such that he can observe whether the master fingerprint for the public key for that ...

I have a question. I used the website (https://www.mobilefish.com/download/ethereum/bip39.html) to generate a 12-words mnemonic(English word list) without password and got below: "organ rate senior ...

Using bitcoinj, my server created a transaction and it was broadcasted on the blockchain. I can get its history using: walletAppKit.wallet().getTransaction(txHash) It is in Pending state. Then I ...

ledger has a max. 8 number pin for unlocking it as far I know. I am very interested, can someone say if (given any method/resources) it is in any scenario (except luck) possible to guess this 8 ...

When trying: bitcoin-cli getdescriptorinfo "wsh(sortedmulti(2,tpubDFck48zH8ZzteKKZCR9WMVBJwHZayhQmtCDyDRzHsU7VMTwEXohD23h1CBiizKtFtWck2fVegNDRM193nGx3VLs1RTSGNc1iePKpc1JvsS6/*,...

this is a pretty general, conceptual question. I feel I do not yet completely understand the blockchain transaction dynamics. Let's say, we have A, B and C trading on the Blockchain: A has ...

I must have missed the memo. I see Bitcoin Core 19.1.0.1 defaults to generating Bech32 receive addresses (prefixed with "bc1"), and offers a checkmark to generate P2SH addresses instead (prefixed ...

Facebook has issued the Libra, Venezuela issued Petro, China issued DCEP. Can they be considered real cryptocurrencies? They are centralized, backed by other currencies, etc, so they don't seem like ...

I am currently doing IBD in segments due to logistical reasons, but each time I safely shut down Core and unplug my hard drive (HDD, 1TB) and then plug it back in and start up Core, it starts in 2009 ...

Is there a way to know from bitcoind RPC if it's syncing headers or blocks? And is there a way to know the header sync progress? Even if not directly available, is it possible to derive header sync ...

how is the cryptanalysis' current state on both sha256 and litecoin's scrypt? is litecoin's scrypt on a security level like sha256? by security i simply mean ways to "break"/"de-cipher" the hash ...

Is it possible that a cryptocurrency can be stable, without being backed by another currency, for example stable by algorithm? For example, when the value is too high, the algorithm will increased ...

in another post someones wrote, Bitcoin nodes use to communicate with each other. You can disable incoming connections on your node if you don't like that (set listen=0 in bitcoin.conf). Now i ...

How do I restore a c-lightning node from hsm_scret? I have tried running lightningd having the backed up hsm_secret. It shows no outputs and no channels. How can I retrieve the funds in the node