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News about Us

Billionaire Druckenmiller says ledger-based system could replace USD worldwide

Billionaire Stanley Druckenmiller thinks some kind of crypto-derived ledger system may replace the U.S. dollar as the world’s reserve currency in the future. Billiona...

Mastercard Payment Index: More Consumers in Three African Countries Plan to Use Crypto Based Payment Methods

According to a recent Mastercard payment index report, the Covid-19 related lockdowns helped spread the use of cryptocurrency in three African countries, namely Nigeria, Kenya, and South Africa. The report also reveals that a greater number of consum...

Papa John’s Pizza is now offering £10 in free Bitcoin to U.K. customers

submitted by /u/hyperinflationUSA [link] [comments]

Daily Discussion - May 12, 2021 (GMT+0)

Welcome to the Daily Discussion. Please read the disclaimer, guidelines, and rules before participating. Disclaimer: Though karma rules still apply, moderation is less stringent on this thread than on the rest of the sub. Therefore, consider all in...

In a mining pool, can there be any two or more nodes mining a block using the same nonce?

Me and my friend decided to try to mine cryptocurrencies using somewhat old (few years old) unused but somewhat decent gaming PC. We decided to create or join a mining pool to double our processing power. Since, the coin reward in mining pool is gon...

Custom Payment Gateway UX Help (in app purchases)

I have built a very basic custom payment gateway that accepts Bitcoin. I am running a Bitcoin Core node in a Docker container. I have a backend web service that sends rpc calls to this node to read / send transactions. This web serv...

Is there a difference between OP_PUSHBYTES and OP_PUSHDATA

In what documentation? I believe you are talking about how rust-bitcoin refers to the OPs > OP_FALSE and < OP_PUSHDATA1 and will answer as such. There are multiple OP codes pushing bytes to the stack, defined as integers. Special case: pushing...

Stealing a correct hash because of an invalid block

It's not a valid working process: the block hash commits to all transactions. First of all a miner cannot "find a right hash" then insert a double-spend transaction. This would invalidate the hash (and the block, actually).For the same reason, a nod...

What is the difference between policy and consensus when it comes to a Bitcoin Core node validating scripts?

The term "consensus checks" refers to the rules that determine whether a block is valid; specifically, if a consensus check on a block (or a transaction contained within a block) fails, then the block is considered invalid. If we get to the end of...

How to approach building a custom UTXO index on top of a full-node

I want to avoid physically importing addresses into a wallet. I want to write a UTXO indexing system on a per-address basis. I often wonder how a wallet can keep track of all of its addresses' UTXOs, seeing as transaction outputs ca...

Can I "duplicate" a wallet using a backup phrase (12 words)?

Can I “duplicate” a wallet using a backup phrase (12 words)? Yes Where is my balance stored? Both wallets will scan the relevant parts of the public transaction-journal ("blockchain") to add up the amount of money controlled by the keys derived...

How to check if one transactions is from the same wallet (public key) as a previous one

If the transaction in question consumes inputs that were locked to a bitcoin address that has been previously used, then it would be easy to tell that the payment came from the same wallet. After all, the payment came 'from the same address' as a pr...

Could CHECKSIGADD be used on new ECDSA multisignatures instead of CHECKMULTISIG?

The proposed Taproot soft fork (BIP 342) defines the new opcode OP_CHECKSIGADD to verify Schnorr multisignatures whilst OP_CHECKMULTISIG (and OP_CHECKMULTISIGVERIFY) are disabled for Taproot spends (SegWit version 1). Could we use the OP_CHECKSIGADD...

Using BTCPay Server along with a web server in a single machine

For better context: https://stackoverflow.com/questions/63123652/is-there-a-way-to-set-port-in-a-dns-forward Hello community! I have setup an aws ec2 instance and installed BTCPay server on it. I used the Docker version. I also bought a domain name...

Do I need a Bitcoin full node in order to use BTC RPC Explorer?

blockexplorer - Do I need a Bitcoin full node in order to use BTC RPC Explorer? - Bitcoin Stack Exchange 2022 Developer Survey is open! Take survey. ...

Help needed with PyWallet and wallet dump using MacOS

Your privacy By...

How can I get all transaction for a specific address using Nbitcoin?

How can I get all transaction for a specific address using Nbitcoin? - Bitcoin Stack Exchange Last call to make your voice heard! Our 2022 Developer Survey close...

How to use python reference for encoding a bech32 address?

How to use python reference for encoding a bech32 address? - Bitcoin Stack Exchange Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts....

Can I print my public key using a custom logo?

You generally don't publish your public keys, you give clients an address (which is usually computed from a public key, but not exactly the same). You can definitely put an address in a QRCode. Putting a logo in the QRCode doesn't change anything ab...

Why should I use a Bitcoin Mixer?

Using a mixer helps preserve your financial privacy. The question is: who are you protecting your privacy from? Bitcoin transactions are public record, so anybody can view any historical transaction at their leisure. So when considering your privacy...

How find own address in testnet using bitcoin-cli?

transactions - How find own address in testnet using bitcoin-cli? - Bitcoin Stack Exchange Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthus...

How does using a Turing-complete programming language compromise the security of the network? [duplicate]

It is much easier to formally verify the behavior space of Bitcoin script vs. Solidity. For example, the DAO project suffered from reentrancy vulnerabilities, given that one could not predict the behavior of anonymous smart contracts when they were...

Why doesn’t Bitcoin use UDP to do Blockpropagation?

The Bitcoin system doesn't have just one network protocol: Any way of obtaining the blocks is equally valid-- blocks over freenet, over satellite broadcast, over the P2P network, all work just as well and are used in practice. UDP is used with bi...

what is a discrete logarithmic assumption? how does it set-up trustless proofs?

The discrete logarithm problem is a cryptography concept that underlies the basis of much of modern cryptography. In general the discrete logarithm problem states that for the equation bk (mod p) = a where b, a, and p are known values and p is prime...

What are the chances of getting duplicate wallet using bitcoinlib in python3?

When you create a private key, this process is (or at least should be) completely random - meaning that in theory, the probability of creating some specific private key is 1/N where N is the number of possible private keys. There's nothing stopping...

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