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kernel: Add Block Header serialization method

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Add `btck_block_header_to_bytes` serialization method to serialize a
`btck_BlockHeader` into an 80-byte buffer using `SpanWriter` to ensure
zero-allocation serialization.
This commit is contained in:
yuvicc
2026-04-01 20:12:39 +05:30
parent 86662623ec
commit 1ad551281a
4 changed files with 40 additions and 0 deletions
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10
src/kernel/bitcoinkernel.cpp
View File

@@ -1390,6 +1390,16 @@ uint32_t btck_block_header_get_nonce(const btck_BlockHeader* header)
return btck_BlockHeader::get(header).nNonce;
}
int btck_block_header_to_bytes(const btck_BlockHeader* header, unsigned char output[80])
{
try {
SpanWriter{std::as_writable_bytes(std::span{output, 80})} << btck_BlockHeader::get(header);
return 0;
} catch (...) {
return -1;
}
}
void btck_block_header_destroy(btck_BlockHeader* header)
{
delete header;

11
src/kernel/bitcoinkernel.h
View File

@@ -1768,6 +1768,17 @@ BITCOINKERNEL_API int32_t BITCOINKERNEL_WARN_UNUSED_RESULT btck_block_header_get
BITCOINKERNEL_API uint32_t BITCOINKERNEL_WARN_UNUSED_RESULT btck_block_header_get_nonce(
const btck_BlockHeader* header) BITCOINKERNEL_ARG_NONNULL(1);
/**
* @brief Serializes the btck_BlockHeader to bytes.
* This is consensus serialization that is also used for the P2P network.
*
* @param[in] header Non-null.
* @param[out] output The serialized block header (80 bytes).
* @return 0 on success.
*/
BITCOINKERNEL_API int BITCOINKERNEL_WARN_UNUSED_RESULT btck_block_header_to_bytes(
const btck_BlockHeader* header, unsigned char output[80]) BITCOINKERNEL_ARG_NONNULL(1, 2);
/**
* Destroy the btck_BlockHeader.
*/

10
src/kernel/bitcoinkernel_wrapper.h
View File

@@ -746,6 +746,16 @@ public:
{
return btck_block_header_get_nonce(impl());
}
std::array<std::byte, 80> ToBytes() const
{
std::array<std::byte, 80> header;
int res{btck_block_header_to_bytes(impl(), reinterpret_cast<unsigned char*>(header.data()))};
if (res != 0) {
throw std::runtime_error("Failed to serialize block header");
}
return header;
}
};
class BlockHeaderView : public View<btck_BlockHeader>, public BlockHeaderApi<BlockHeaderView>