Some people have suggested repurposing OP_NOP3 as a new opcode, OP_CHECKSEQUENCEVERIFY. What would the new opcode do? Why is it useful? Can't the signer choose the sequence field when they sign? ....

Olivia Olivia: 21 hours ago


Are Bitcoin core devs contributing to ISO/TC 307 Blockchain and distributed ledger technologies

I was just being made aware of the standardization process about blockchain and distributed Leger technologies. In this picture from the talk that I am attending you can see that many institutions are part of the process: However I did not see any institution close to Bitcoin development. I ....

Oliver Oliver: 21 hours ago


What would happen to my bitcoins?

I have a Bitcoin wallet for android and I would like to know what happens if I back up the wallet and restore it in other phone. Will I be able to use the bitcoins in both devices? Thanks in advance ....

Ava Ava: 23 hours ago


Why OP_DUP instead of providing the PubKey twice in P2PKH?

We know that a P2PKH script looks as follows: scriptPubKey: OP_DUP OP_HASH160 <PubKeyHash> OP_EQUALVERIFY OP_CHECKSIG scriptSig: <Signature> <PubKey> Since full nodes are maintaing UTXO sets, wouldn't it save space to omit the OP_DUP and have the user provide their public key twice instead, like so? And would that create any ....

Amelia Amelia: 23 hours ago


How to get Ledger Nano S to work in an Ubuntu VirtualBox?

I installed the ledger manager on Ubuntu VirtualBox, but I can't see any of my USB devices. My host OS is Windows 10. How do I get this to work? ....

Liam Liam: yesterday


RegTest with mainnet addresses

I am trying to run a private Bitcoin network for testing. I tried to run a RegTest network, but I need the addresses to be in the format of the ainnet. Can I configure the RegTest to run with Mainnet addresses? Thanks! ....

Amelia Amelia: yesterday


Am I getting charged extra?

I bought bitcoin on coinbase. I was charged the network fee, I understand. Then I had to transfer my purchase to electrum wallet. I was charged again. Am I doing something wrong?? ....

Amelia Amelia: yesterday


Can Buy Bitcoin From Different country exchange and transfer to wallet

Completely new to this I want to know that, If I purchase bitcoin from exchange website any country Then I can transfer it to Zebpay wallet. Because it looks good deal price is not same everywhere just transaction fee if you purchase in volume then this seems nothing. I'm ....

Isabella Isabella: yesterday


What are the differences and advantages of stratum to HTTP?

I understand that Stratum is a kind of protocol specifically designed for ASIC miners. I found this page from its creator (, but it is very technical. I want to know, in layman's terms, what are the differences between Stratum and HTTP. I also want to know if this means ....

Evelyn Evelyn: yesterday


Visualize Bitcoin Hashing

According to, BitCoin uses the SHA-256 hash algorithm to generate verifiably "random" numbers in a way that requires a predictable amount of CPU effort. Generating a SHA-256 hash with a value less than the current target solves a block and wins you some coins. Here is an example for ....

Noah Noah: yesterday