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Merge bitcoin/bitcoin#34401: kernel: add serialization method for btck_BlockHeader API

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577a3e74c8 test: Add check for return type in `HasToBytes` concept (yuvicc)
1ad551281a kernel: Add Block Header serialization method (yuvicc)
86662623ec Add `SpanWriter` class for zero-allocation stream writing (yuvicc)

Pull request description:

  This adds serialization for `btck_BlockHeader` API. Also, updated the `CheckHandle` to compare the byte content instead of size.

  The changes here is done in two commits. First commit adds the `SpanWriter` class and next one moves the block header serialization to `SpanWriter`. See commit message for more details.

  Follow-up to #33822 .

ACKs for top commit:
  stickies-v:
    re-ACK 577a3e74c8
  alexanderwiederin:
    ACK 577a3e74c8
  theStack:
    Code-review ACK 577a3e74c8
  w0xlt:
    ACK 577a3e74c8

Tree-SHA512: 1eda5b204588ccb23e9357f68c5529474e7d248736a371c47d8db71ba6ca95e121869514478ad7a519d190e4c30725f64fd1ef4dd9f97d2627dc4441e51458e0
This commit is contained in:
merge-script
2026-04-15 15:47:33 +01:00
parent 53f4743c21 577a3e74c8
commit 44ac0c32b9
6 changed files with 97 additions and 1 deletions
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22
src/test/streams_tests.cpp
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@@ -208,6 +208,28 @@ BOOST_AUTO_TEST_CASE(streams_vector_writer)
vch.clear();
}
BOOST_AUTO_TEST_CASE(streams_span_writer)
{
unsigned char a(1);
unsigned char b(2);
unsigned char bytes[] = {3, 4, 5, 6};
std::array<std::byte, 8> arr{};
// Test operator<<
SpanWriter writer{arr};
writer << a << b;
BOOST_CHECK_EQUAL(HexStr(arr), "0102000000000000");
// Use variadic constructor and write to subspan.
SpanWriter{std::span{arr}.subspan(2), a, bytes, b};
BOOST_CHECK_EQUAL(HexStr(arr), "0102010304050602");
// Writing past the end throws
std::array<std::byte, 1> small{};
BOOST_CHECK_THROW(SpanWriter(std::span{small}, a, b), std::ios_base::failure);
BOOST_CHECK_THROW(SpanWriter(std::span{small}) << a << b, std::ios_base::failure);
}
BOOST_AUTO_TEST_CASE(streams_vector_reader)
{
std::vector<unsigned char> vch = {1, 255, 3, 4, 5, 6};