All Questions

Own a wallet.dat file from 2010-2011. Yesterday I saw there was a vulnerability which is makes attacking somewhat easier if your wallet is generated by old client and I'm pretty sure my wallet is ...

How did I find the b64secret that is automatically generated by GDAX API? I have a passphrase and API key that I got from GDAX, but I don't know what/where the b64secret is. The documentation says ...

A friend of mine wants to create "tokens" signifying the completion of certain corporate milestones, e.g., the acquisition of X customers, and then "monetize" these "crypto" tokens as "asset backed ...

I am currently trying to validate a blocks hash against its target in python3: This is a block in the Blockcypher testnet, and I am using this formula from the Bitcoin Wiki. block_hash = '...

I'm using bitcoinj to handle bitcoin. Now I want to generate litecoin address using bitcoinj library. Please help me who knows this answer. Thanks.

Is there a way to get an estimation of how many transactions are being currently (last hour or last 24h) processed by the lightning network? And by a specific node?

https://www.metacertprotocol.com/cryptonite Someone recommend installing this to protect crypto asset. Is this legit? What about if this plugin by itself is phishing? Is it save? Electrum ...

I am developing a Bitcoin Wallet in Javascript. I've worked on ETH but it's my first time on BTC. Here are following queries if anyone can help: How do we generate bitcoin Wallet like we do in ...

I am searching for the rpc function that will set the transaction fee . So far i am not able to find. how can we set the transactions fee for setting the transactions priority.

Wants me to select currency on invoice page. I cannot find invoice page.

How should I pack the message? It can connect the full node by following command: curl --user rpc --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getinfo", "params": [] }' -H 'content-...

My question is this: How exactly does the stratum protocol distribute "work" to miners? More specifically, since mining can be compared (in many regards) to "brute forcing" a cryptographic hash (i.e. ...

Let's say Alice owns 12 BTC in her wallet, and she tries to send 5 BTC to Bob. First the transaction is broadcast to all nodes, then transaction is in the transaction pool. Then miners would choose ...

Context: There is a bet going on r/bitcoin about the possibility of doing a user activated soft fork for reducing current miner reward to 0.25 BTC. One of the users says the bet had two points: the ...

I use bitcoin hardware mining. Can I modify the hardware to mine Zcash cryptocurrency or I should buy Zcash mining hardware?

Is it possible to define a multi signature address that allows spending only certain percentage to each signature? For example, three different people with different public-private keys build an pay ...

In this question, I talked about electrum litecoin wallet keeps synchronizing. Electrum Litecoin keeps synchronizing. What should I do? Reinstalling a newer version works. While I already solved my ...

https://ambcrypto.com/mining-in-the-bear-market-made-easy-fast-and-cheap-with-minergate/ This one claims they can mine more efficiently by mining several coins at once. I have a hard time believing ...

This is my understanding of what a transaction looks like: inputs: input0: txid: <funding tx0 TXID> outputID: <output ID of UTXO in the funding tx0> scriptSig: <...

This might be a dumb question: I started the Bitcoin daemon for an initial blockchain download. It immediately started downloading, I edited the Bitcoin.conf file with txindex=1. Stopped and restarted ...

According to bip65 https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki I can use expressions like IF ... ELSE ... ENDIF Here is example script from this document: IF HASH160 <...

I'm posting this after reading the answers to this: Where is the Signature stored in a SegWit transaction? I've found out from reading that, that in Segwit, the "witnesses" (or signatures) that ...

According to an interview with Yeastplume on What Bitcoin Did, Grin is going to have a flat reward schedule of 60 grin per block at one minute blocks, i.e. about one grin per second. This translates ...

This URL where the Copay wallet used to be now just shows "We're sorry, the requested URL was not found on this server." Why was it removed? Was there a security issue? Is this going to affect the app ...

I came to know that Bitcoin wallet will caluculate address from public key but I want to know how it will caluculate. After caluculating how will it know that address is redundant free.

Is there a way to make bitcoin-cli output JSON-serialized errors? For example if I do bitcoin-cli getblock foo the output is error code: -5 error message: Block not found I want the output to be ...

Are there any p2p decentralised cross border network structure out there?

After creating a new NBitcoin transaction (with a single non-standard pay-to-script input and multiple outputs), is there any way to calculate the transaction signature and manually put it in the ...

Sent my btc address 3 days ago for a payment to one of my customer he didnt respond or paid . next day i provided the same address to my another customer for a payment which he sent. Now today i ...

I have been doing some research on the Bitcoin Cash hard fork and the main contention of increasing the block size appears to be the possibility of less security on the network. How does an increased ...

I checked in blockchain the wallet address that received my payment for .0238 ether and i saw the transaction already recorded.This wallet address has only 5 ether in his wallet and he has to send 20 ...

Not limited to bitcoin. How does blockchain developers or businesses make the decision on which consensus algorithm to choose? What are the things to consider when deciding on the consensus ...

I'm trying to integrate USDT payment method (Omni layer) in my application, like https://luckygames.io/. Can anyone please help me answer my questions: Is there any public node to work with Omni ...

I have issues trying to sign a 2/3 multisig tx with the first private key. What am I doing something wrong or am I missing something for the arg? Command format: /usr/bin/bitcoin-cli -testnet ...

I started a new Bitcoin Core(testnet) and the download of blocks worked perfectly till 15% and then i don't know what happened, but i got the following error: unknown new rules activated (versionbit 1)...

What are the basic differences between BTC ,LTC and BTG? What are the advantages and disadvantages of these basic differences? Do these disadvantages (advantages ) weaken (strengthen ) the basic ...

From what I can gather BOLT #4 is applying similar methods, such as obscuring previous and future hops from intermediate nodes, to the TOR network for routing payments across the Lightning network. ...

I issued this transaction on testnet (for a homework later solved with another script). python-bitcoinlib validates the transaction but when i submit it to blockcypher it gets rejected with error: {"...

Would changes to liquid (e.g. bulletproof) be implemented by a hardfork (2/3+ just sign off on the change?) Or some soft-fork with compatibility? Also how large & often are liquid blocks?

how does a miner choose which transactions go into the next block? do all transactions go through or is there a lottery process? I understand transactions with higher fees are given priority.

I don't understand, how multi-sig signatures are generated. I've seen that inputs redeeming a multi-sig output, can be signed and signed over repeatedly, with different private keys using bitcoind's ...

I'm wondering if by downloading txs and blocks from, say, https://blockchair.com I could potentially assemble a full raw block. Does anyone know that? Its purely for entertainment and explanation ...

Can transaction be stuck in the 'processing' stage and has not been mined by the Blockchain network and due to this, it cannot reflect in wallet ? My friend send me a bit coin but it did not reach me,...

There must be magical cryptographic reason why CT doesn't create an UTXO. If it did make an UTXO, it'd be trivial to calculate the input + output right?

I wanna setup a dnsseed for a crypto currency using sipa/bitcoin-seeder on my VPS. The server is hosted at NetCup and running the software as root, and also listening on port :53 UDP. My domain is ...

Is there is any bitcoin RPC call for setting the transactions priority ?

Copay wallet app. delisted at play store? I have a copay wallet. Is this going to aeffect my app whic is in my cell phone.

When signing a pubkeyhash UTXO, it is required to provide both a signature and a public key. The public key is duplicated and one copy is provided to op_checksigverify to ensure the signature is valid,...

I am just wondering when transaction hashes were able to be segwit rather than legacy. Thanks I need to know the year preferably.

I am working on a school problem and want to generate a hash starting with 9 zeros, it is assumed to be the first block with only your name and the previous hash is 64 zeros. Can anybody help me or ...