So I having this issue where in my local system when I hit getblock RPC method in a public node, for block number 2813986, I get around 22000 transactions in it, But when I check on blockstream.info/testnet it seems like it has only 300 transactions, So not sure which one is the correct one? any help is highly appreciated ..read more

Let's say that, through a stroke of luck, a friend has found a valid block on his laptop. Let's say he knows the IP address of a remote Bitcoin Core full node. What message could he send to the node to be confident that his valid block will be broadcast to the network and appended to the chain? What should the format/encoding be? What communication protocol(s) should he use? Would the full node need any specific operating system configuration, or additional software, to facilitate this? Are there any other approaches he could use? Incidentally, let's say that my friend would be particularly gr ..read more

Let's say that, for some ununderstandable reason, a miner does not care about receiving the block reward. Rather, the miner cares only about achieving the smallest ever block. What would be the size of the smallest possible coinbase transaction (that would be accepted as valid by the Bitcoin network)? Can the output fields be omitted? What, by extension, would be the size of the smallest possible Bitcoin block? See Also What is the format of the coinbase transaction? What fields of a coinbase transaction can be empty ..read more

What's the simplest way to test and verify that I am the owner of the fund except sending a real coin? For legacy address, I think i can verify with signing/verifying message, is this simplest? But what can i do for the SegWit address ..read more

Can litecoin transaction to be send to bitcoin blockchain(to be sent to bitcoin address)using lighting network ..read more

One possible optimization to compress bitcoin transaction size is avoiding repetition of redundant data between inputs. As a consensus change, a new transaction type could allow signing a list of txid:vout pairs if they all share the same output script. To pick an extreme example, there are 1.6 million outputs with script 1HckjUpRGcrrRAtFaaCAUaGjsPx9oYmLaZ. Spending one of these P2PKH outputs costs 40+72 vBytes (prevOut + scriptSig) per input. By aggregating the scriptSig across inputs, the transaction could omit 72 per input and only include it once per transaction. When consolidating all the ..read more

One possible optimization to compress bitcoin transaction size is avoiding repetition of redundant data between inputs. As a consensus change, a new transaction type could allow signing a list of txid:vout pairs if they all share the same output script. To pick an extreme example, there are 1.6 million outputs with script 1HckjUpRGcrrRAtFaaCAUaGjsPx9oYmLaZ. Spending one of these P2PKH outputs costs 40+72 vBytes (prevOut + scriptSig) per input. By aggregating the scriptSig across inputs, the transaction could omit 72 per input and only include it once per transaction. When consolidating all the ..read more

I requested a withdraw for some funds to my wallet but customer service keep telling me that its going to take awhile for it to be processed because I'm not top tier members. It's been three days now and still nothing, should I be worried ..read more

A recent research report released by Grayscale elaborates on the concept of tokenization as registering asset ownership on blockchain infrastructure. The report highlights that through tokenization, assets can benefit from various advantages of blockchain, including more efficient settlement processes and interaction with smart contracts. While tokenization may not directly improve efficiency in the already efficient modern financial system, its true value lies in integrating users, assets, and applications into a global platform. Qmiax Cryptocurrency Exchange has recognized the potential of t ..read more

What is a simple explanation of CScriptNum, the number encoding used by arithmetic opcodes in Bitcoin Script? What would an illustrative pseudocode/python example look like? What should the encoding of the following decimals be (in hexadecimal)? 42 88 257 17000 8589934592 When is it not 4 bytes? See Also: Why are arithmetic script opcodes limited to 4 byte operands? Arithmetic operations in Bitcoin (OP_ADD, etc) Compact integer in Scripts ..read more