Bitcoin: Transaction incorrect when reading a block from `blk*.dat` files

Error when reading block data from blk*.dat files on Bitcoin

Users may encounter an error when trying to read blocks from files saved in .dat format. This issue occurs due to incorrect formatting of blockchain data in these files.

The issue occurs when reading the first block (1,669,774) from testnet files hosted on [ (

To resolve this issue, the file must be opened and read correctly to ensure accurate data extraction.

Troubleshooting Steps:

• Check the file format:

  

  Make sure the files are in the .dat format as Blockstream intended. If the format is incorrect, this can lead to errors when trying to read the block.

• Use the correct block reading commands: The blk*.dat filenames indicate that each block should be read separately. To get a complete view of the blockchain, make sure you are using the correct command and processing steps.

Example use case:

To confirm the issue, try reading the first block from the testnet files hosted at [ (

blk*.date | blockview -block 1 -format json

Conclusion:

In summary, incorrect formatting of blockchain data in .dat files can cause problems when trying to read blocks. Check the file format, use the correct command processing steps, and ensure accurate processing of each block’s data.

Recommendations:

• Always check that .dat files are in the correct format for Blockstream.

Use blk.dat filenames indicated in the testnet files to process blocks accurately.

• Refer to the official Blockstream documentation or support resources if you encounter any further issues.

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