bitcoin

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Ava Chow 4a020ca443 Merge bitcoin/bitcoin#29401 : test: Remove struct.pack from almost all places

fa52e13ee8 test: Remove struct.pack from almost all places (MarcoFalke)
fa826db477 scripted-diff: test: Use int.to_bytes over struct packing (MarcoFalke)
faf2a975ad test: Use int.to_bytes over struct packing (MarcoFalke)
faf3cd659a test: Normalize struct.pack format (MarcoFalke)

Pull request description:

  `struct.pack` has many issues:

  * The format string consists of characters that may be confusing and may need to be looked up in the documentation, as opposed to using easy to understand self-documenting code.

  This lead to many test bugs, which weren't hit, which is fine, but still confusing. Ref: https://github.com/bitcoin/bitcoin/pull/29400, https://github.com/bitcoin/bitcoin/pull/29399, https://github.com/bitcoin/bitcoin/pull/29363, fa3886b7c6, ...

  Fix all issues by using the built-in `int` helpers `to_bytes` via a scripted diff.

  Review notes:

  * For `struct.pack` and `int.to_bytes` the error behavior is the same, although the error messages are not identical.
  * Two `struct.pack` remain. One for float serialization in a C++ code comment, and one for native serialization.

ACKs for top commit:
  achow101:
    ACK fa52e13ee8
  rkrux:
    tACK [fa52e13](fa52e13ee8)
  theStack:
    Code-review ACK fa52e13ee8

Tree-SHA512: ee80d935b68ae43d1654b047e84ceb80abbd20306df35cca848b3f7874634b518560ddcbc7e714e2e7a19241e153dee64556dc4701287ae811e26e4f8c57fe3e