Decode bitcoin transaction

with 3 Comments

The solution was to use the coinbase transaction as a source of extra nonce values. Because the coinbase script can store between 2 and bytes of data (~first 4 bytes reserved for block identification), miners started using that 96 byte space as extra nonce, allowing them to explore a much larger range of block header values to find valid. gives an error: invalid transaction encoding. Decode the transaction into a JSON block. error: invalid transaction encoding. All the time under a debug build x86 or release build x86 or debug Release Build x Downloaded the entire source code on 30/11/ UTC from Github. Windows 10 Pro, Intel Cor I CPU@ GHz, GB SSD. Decode raw Bitcoin transaction - Experts reveal unthinkable results There are metric linear unit lot of options on. letter a cryptocurrency wallet is a software system software program that stores the private and public keys that connect you to the blockchain where your cryptocurrency exists.

Decode bitcoin transaction

blockchain - How to decode a coinbase transaction? - Bitcoin Stack Exchange

In the early days of Bitcoin, a miner could find a block by iterating through the nonce until the resulting hash was below the target.

As difficulty increased, miners often cycled through all 4 billion values of the nonce 2 32 without finding a valid block header hash. However, this was easily resolved by updating the block timestamp to account for the elapsed time. Because the timestamp is part of the header, the change would allow miners to iterate through the values of the nonce again with different results.

Once mining hardware became really efficient, however, this approach became increasingly difficult because the nonce values were exhausted in less than a second. Hence, the mining software needed more space for nonce values in order to find valid blocks.

The timestamp could be stretched a bit, but moving it too far into the future would cause the block to become invalid. The solution was to use the coinbase transaction as a source of extra nonce values. The mining pools also use the coinbase data as an identification of who mined the block. For example if you look at block , , you will see the coinbase data contain the bytes 0x4deef6f6c. Unfortunately the block you mentioned did not have any identification hence I had to use a different block that did have it.

However, it is important to note that this data cannot be relied upon, as any miner can mine a block tomorrow with a data claiming it to be mined by a different pool, may be to hide its identity or frame others. Sign up to join this community. The best answers are voted up and rise to the top. How to decode a coinbase transaction? Ask Question. Asked 1 year, 3 months ago. Active 1 year, 3 months ago. Viewed times. Ugam Kamat 6, 2 2 gold badges 10 10 silver badges 34 34 bronze badges.

Active Oldest Votes. Ugam Kamat Ugam Kamat 6, 2 2 gold badges 10 10 silver badges 34 34 bronze badges. Thank you for your comment : It will be really helpful. The reason why I want to decode coinbase tx is I want get who mines a block. But according to your answer, my approach is not reliable. Then is there no reliable way to find out who mines a block? You can refer to the answer here for more information. Sign up or log in Sign up using Google. Sign up using Facebook.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Compiled the source code using Visual Studio ver.

Downloaded pre compiled bitcoin-tx. It decodes the transaction successfully. The text was updated successfully, but these errors were encountered:. Where have you encoded this transaction? Lol possible except this and many more transactions where extracted from the blockchain. I decoded the entire chain and there were a few thousand similar transactions. Also note in my post I said that the precompiled Bitcoin-tx decided it properly. Hey, i just want to open the same issue.

I use Bitcoin Core version v0. The bug is that when the segwit array length indicator is zero then the decoder throws error. Probably another regression of On master: I can decode widdoh 's transaction but see the same thing as what iFA88 reports. After decoding the blockchain data files I came across transactions similar to the one I posted! It's possible that there is a regression here that we should look into, but inevitably the result will always be wrong for some possibly exceptional cases.

I am using Bitcoin-tx to do the decoding. In the source code the error is generated by : if! It incorrectly decides to not return the extended serialization if it doesn't pass a heurstic, even if the legacy decoder fails. See for a fix. It has the extended serialization marker "" for a transaction with no witnesses. That is invalid according to BIP I believe it will succeed on all blockchain transaction with that patch, though in theory it's still possible that some decode incorrectly as 0-input transactions instead.

File blk After your fix they are down to 28!

Below is block result of block height 200,000 Your Answer

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3 Responses

  1. Gardaramar
    | Reply

    Between us speaking, in my opinion, it is obvious. I recommend to look for the answer to your question in google.com

  2. Goltishakar
    | Reply

    And not so happens))))

  3. Akigal
    | Reply

    I can not take part now in discussion - it is very occupied. I will be free - I will necessarily express the opinion.

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