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cryptonote: scope 202612 PoW workaround

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The block 202612 PoW workaround previously applied to any block at
height 202612. Restrict it to the object hashes of the known historical
mainnet, testnet, and stagenet block hashing blobs so new chains do not
inherit the fixed PoW hash, which would prevent sync or mining past that
height if their difficulty is higher.

Reported-by: DataHoarder
Co-authored-by: jeffro256 <jeffro256@tutanota.com>
This commit is contained in:
selsta
2026-07-03 14:59:41 +02:00
co-authored by jeffro256
parent ee50ba98c9
commit dc8bc028a6
5 changed files with 141 additions and 6 deletions
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src/cryptonote_basic/cryptonote_format_utils.cpp
+30 -6
View File
@@ -1598,6 +1598,32 @@ namespace cryptonote
return get_tx_tree_hash(txs_ids);
}
//---------------------------------------------------------------
static bool get_block_longhash_202612(const blobdata_ref block_hashing_blob, crypto::hash &res)
{
static constexpr const char longhash_202612[] = "84f64766475d51837ac9efbef1926486e58563c95a19fef4aec3254f03000000";
// Object hashes of get_block_hashing_blob(block). The mainnet value differs
// from the public block id because calculate_block_hash() replaces that id.
static constexpr const char * const block_hashing_blob_ids_202612[] =
{
"426d16cff04c71f8b16340b722dc4010a2dd3831c22041431f772547ba6e331a", // mainnet
"248fde4b96b829c4ddbd00e3f76d35b03d01257898bc1b5578bc9e04b379a676", // testnet
"f3449e658b5f880c4b0e69007ed5d092c9c883ac3a518166fa652d5cc505e7b1", // stagenet
};
crypto::hash block_id;
const blobdata block_hashing_blob_copy(block_hashing_blob.data(), block_hashing_blob.size());
get_object_hash(block_hashing_blob_copy, block_id);
const std::string block_id_hex = string_tools::pod_to_hex(block_id);
for (const char * const expected_block_id: block_hashing_blob_ids_202612)
{
if (block_id_hex == expected_block_id)
{
return epee::string_tools::hex_to_pod(longhash_202612, res);
}
}
return false;
}
//---------------------------------------------------------------
crypto::hash get_block_longhash(const blobdata_ref block_hashing_blob,
const uint64_t height,
const uint8_t major_version,
@@ -1605,12 +1631,10 @@ namespace cryptonote
{
crypto::hash res;
if (height == 202612) // block 202612 bug workaround
{
static const std::string longhash_202612 = "84f64766475d51837ac9efbef1926486e58563c95a19fef4aec3254f03000000";
epee::string_tools::hex_to_pod(longhash_202612, res);
}
else if (major_version >= RX_BLOCK_VERSION) // RandomX
if (height == 202612 && get_block_longhash_202612(block_hashing_blob, res))
return res;
if (major_version >= RX_BLOCK_VERSION) // RandomX
{
crypto::rx_slow_hash(seed_hash.data, block_hashing_blob.data(), block_hashing_blob.size(), res.data);
}