Ava Chow 413844f1c2 Merge bitcoin/bitcoin#29612: rpc: Optimize serialization and enhance metadata of dumptxoutset output ...

542e13b293 rpc: Enhance metadata of the dumptxoutset output (Fabian Jahr)
4d8e5edbaa assumeutxo: Add documentation on dumptxoutset serialization format (Fabian Jahr)
c14ed7f384 assumeutxo: Add test for changed coin size value (Fabian Jahr)
de95953d87 rpc: Optimize serialization disk space of dumptxoutset (Fabian Jahr)

Pull request description:

  The second attempt at implementing the `dumptxoutset` space optimization as suggested in #25675. Closes #25675.

  This builds on the work done in #26045, addresses open feedback, adds some further improvements (most importantly usage of compact size), documentation, and an additional test.

  The [original snapshot at height 830,000](https://github.com/bitcoin/bitcoin/pull/29551) came in at 10.82 GB. With this change, the same snapshot is 8.94 GB, a reduction of 17.4%.

  This also enhances the metadata of the output file and adds the following data to allow for better error handling and make future upgrades easier:
  - A newly introduced utxo set magic
  - A version number
  - The network magic
  - The block height

ACKs for top commit:
  achow101:
    ACK 542e13b293
  TheCharlatan:
    Re-ACK 542e13b293
  theStack:
    ACK 542e13b293

Tree-SHA512: 0825d30e5c3c364062db3c6cbca4e3c680e6e6d3e259fa70c0c2b2a7020f24a47406a623582040988d5c7745b08649c31110df4c10656aa25f3f27eb35843d99

2024-05-23 12:31:23 -04:00

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