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I just started studying bitcoin.

I would like to be able to download a single block from the Bitcoin network.

I referred to the following: https://blockchain.info/rawblock/0000000000000000000212f7c098effbb7d814b481ead2b315f605371e47bae1?format=hex

But, it's not the size of the block I know (like 1MB).

How can I get one?

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Yes, it's the whole block. The hex text is 2.5 MB. Hex has 50% efficiency, so the block is 1.25 MB.

Since SegWit, blocks can be larger than 1 MB. There's a 4 MB hard limit which is almost impossible to reach. (With the largest block to date being 2.4 MB, 4.8 MB in hex)

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    Thanks!! Now I know hex efficiency. So can i get original data size in python (1.25MB)?
    – seonguk park
    Jun 19, 2020 at 9:31
  • You're welcome. More precisely, two hex characters code for one byte @seongukpark
    – MCCCS
    Jun 19, 2020 at 9:32
  • I'm so sorry.. This is the last question. Can I get original size data? (Change two hex characters code to one byte in python)
    – seonguk park
    Jun 19, 2020 at 10:10
  • You need to decode hex to have binary data: stackoverflow.com/a/5682984
    – MCCCS
    Jun 19, 2020 at 10:13

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