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1answer
172 views

Multisig scripts hashing (p2sh): difference between legacy and segwit

Some time ago I noticed that, given the same inputs, addmultisigaddress and createmultisig Bitcoin core's methods were generating different p2sh (addresses). I asked around and a user from the ...
0
votes
2answers
357 views

Bitcoin-core how to get all transactions hashes?

Please, can anyone help me how to get all transactions hashes? How to browse all the transactions hashes used in blockchain? P.S. How simply get a list of all transactions IDs (as a simple text list) ...
0
votes
2answers
264 views

Raw data of dates in all blocks using PHP or R

Is it possible to obtain the date (time stamp) of each bitcoin block so far, using languages like PHP or R?. I am developing an analysis of the time series of bitcoin use for a scientific project, ...
2
votes
3answers
791 views

Are there any blockchain explorers that provide raw Tx data and block headers?

I've looked at some of the more popular blockchain explorers, but none of them seem to provide the feature I'm looking for. I'd like to find a blockchain explorer that allows you to see raw Tx data ...
1
vote
1answer
131 views

Can someone post an explanation of how to get the input/output addresses?

Can someone post an explanation of how to find the source and destination addresses of a transaction from the input/output portions of a block?
1
vote
1answer
280 views

Do you know any download site for full blockchain header data (6) in CSV ASCII format?

do you know any download site for full blockchain header data (6 variables) in CSV ASCII format ? I would like to enter block header data for every block from No.0 to latest into mining simulator to ...
1
vote
1answer
632 views

Orphaned (non referenced) blocks list

Orphan block is a block that doesn't have a known parent in the longest block chain. As I understand, this mean that orphaned block does not have a reference on it as "previous block hash" in any ...
1
vote
2answers
2k views

Is it possible to download all blockchain raw data?

I'm interested in doing some analysis on the blockchain that would require specific information about all individual transactions within each block. I don't need the data to be updating in real-time, ...
1
vote
1answer
2k views

How to start working with blk*.dat data?

I have the complete bitcoins block data (blk00000.dat, blk00001.dat.....). I want to convert it into some readable format like csv or json. Can it be done using python or any other software ?
6
votes
2answers
234 views

special block version or is my data corrupt?

I've recently written my own blockchain parser. It works well (yay!) up to a certain block and then fails because the data read is pure nonsense. I've tracked down the error away from my code to the ...
9
votes
1answer
626 views

How much out of order are the blocks stored in the blk*.dat files?

To be more exact: Given two blocks A and B, with heights A < B, but with positions in the blk file (we'll call them pA and pB) pA > pB. What is the maximum amount of blocks that there could be ...
12
votes
6answers
20k views

How to store data on the blockchain?

I am wondering if it is possible to give someone a bitcoin transaction ID and with that he can read some hidden data, like the blockchain.info notes on transactions, but for real, stored in the ...
3
votes
2answers
9k views

Raw Block data in Hexadecimals

Is there any Web API available for us to query Blockchain data in hex format? The format should follow the standard (https://en.bitcoin.it/wiki/Block#Block_structure) structure rather than JSON.
23
votes
1answer
5k views

How is the whitepaper decoded from the blockchain (Tx with ~1000x m of n multisig outputs)

The whitepaper is apparently encoded at 54e48e5f5c656b26c3bca14a8c95aa583d07ebe84dde3b7dd4a78f4e4186e713, which is an m of n multisig Tx with 947 outputs (just under the scriptsig limit of 20kB!). ...
3
votes
2answers
664 views

Non standard Tx with obscure OP codes: examples

I've been writing Python code to fetch various transactions and came across this: 77822fd6663c665104119cb7635352756dfc50da76a92d417ec1a12c518fad69. The script field is as follows: scriptPubKey: "...
2
votes
2answers
2k views

How much binary data (bytes) could I put in a transaction and how?

I know that some people had put text, pdf and images in the blockchain. I wonder which are the limits in order to have a minimum "bytes/btc" value in regarding the blockchain as a permanent database. ...
4
votes
1answer
2k views

Details on Genesis Block

The question asked here displays the genesis block in pretty good detail. I am still trying to get a breakdown of some of the elements seen here (and some others not seen here): The Merkle Root Time ...
3
votes
1answer
83 views

Can a blockchain transaction history be updated by text messages using a mobile network?

Is it possible to update Bitcoin transactions over mobile networks using texts or voice data transmission?
3
votes
1answer
4k views

How to retrieve all addresses with non-zero balance and their balances?

I'm looking for a way to retrieve all address balances of addresses with a non-zero balance in the blockchain. Is there a software tool that can calculate the balances in an accessible format? Or ...
19
votes
4answers
13k views

Reliable, efficient way to parse the blockchain into a SQL database

I need to generate a SQL database (preferably SQLite3) of every transaction that has occurred in the blockchain. Is there an efficient way to do this using open-source software? I'm attempting to do ...
1
vote
1answer
197 views

The change to the size of blockchain data files

The blkXXXXX.dat files in the new Bitcoin-Qt client (v0.8.1) are about 130MB each in size, while the old ones are about 1.9GB in size each. Does anyone know the motivation behind this change?
4
votes
3answers
1k views

Limit size of data files

As the mere size of the constantly changing data file tampers with my backup concept, I would like to ask if there is a way to split this file into many smaller pieces. I have no problem with the size ...
4
votes
1answer
519 views

Raw block / other messages

Where can I find a raw version of the Bitcoin blocks and other messages that are sent between the Bitcoin clients?