Files
bitcoin/doc
glozow 6b165f5906 Merge bitcoin/bitcoin#31384: mining: bugfix: Fix duplicate coinbase tx weight reservation
386eecff5f doc: add release notes (ismaelsadeeq)
3eaa0a3b66 miner: init: add `-blockreservedweight` startup option (ismaelsadeeq)
777434a2cd doc: rpc: improve `getmininginfo` help text (ismaelsadeeq)
c8acd4032d init: fail to start when `-blockmaxweight` exceeds `MAX_BLOCK_WEIGHT` (ismaelsadeeq)
5bb31633cc test: add `-blockmaxweight` startup option functional test (ismaelsadeeq)
2c7d90a6d6 miner: bugfix: fix duplicate weight reservation in block assembler (ismaelsadeeq)

Pull request description:

  * This PR attempts to fix the duplicate coinbase weight reservation issue we currently have.
  * Fixes #21950

  We reserve 4000 weight units for coinbase transaction in `DEFAULT_BLOCK_MAX_WEIGHT`

  7590e93bc7/src/policy/policy.h (L23)

  And also reserve additional `4000` weight units in the default `BlockCreationOptions` struct.

  7590e93bc7/src/node/types.h (L36-L40)

  **Motivation**

  - This issue was first noticed during a review here https://github.com/bitcoin/bitcoin/pull/11100#discussion_r136157411)
  - It was later reported in issue #21950.
  - I also came across the bug while writing a test for building the block template. I could not create a block template above `3,992,000` in the block assembler, and this was not documented anywhere. It took me a while to realize that we were reserving space for the coinbase transaction weight twice.

  ---
  This PR fixes this by consolidating the reservation to be in a single location in the codebase.

  This PR then adds a new startup option `-blockreservedweight` whose default is `8000` that can be used to lower or increase the block reserved weight for block header, txs count, coinbase tx.

ACKs for top commit:
  Sjors:
    ACK 386eecff5f
  fjahr:
    Code review ACK 386eecff5f
  glozow:
    utACK 386eecff5f, nonblocking nits. I do think the release notes should be clarified more
  pinheadmz:
    ACK 386eecff5f

Tree-SHA512: f27efa1da57947b7f4d42b9322b83d13afe73dd749dd9cac49360002824dd41c99a876a610554ac2d67bad7485020b9dcc423a8e6748fc79d6a10de6d4357d4c
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Bitcoin Core

Setup

Bitcoin Core is the original Bitcoin client and it builds the backbone of the network. It downloads and, by default, stores the entire history of Bitcoin transactions, which requires several hundred gigabytes or more of disk space. Depending on the speed of your computer and network connection, the synchronization process can take anywhere from a few hours to several days or more.

To download Bitcoin Core, visit bitcoincore.org.

Running

The following are some helpful notes on how to run Bitcoin Core on your native platform.

Unix

Unpack the files into a directory and run:

  • bin/bitcoin-qt (GUI) or
  • bin/bitcoind (headless)

Windows

Unpack the files into a directory, and then run bitcoin-qt.exe.

macOS

Drag Bitcoin Core to your applications folder, and then run Bitcoin Core.

Need Help?

Building

The following are developer notes on how to build Bitcoin Core on your native platform. They are not complete guides, but include notes on the necessary libraries, compile flags, etc.

Development

The Bitcoin repo's root README contains relevant information on the development process and automated testing.

Resources

Miscellaneous

License

Distributed under the MIT software license.