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cryptonote_basic: fix add_extra_nonce_to_tx_extra() length

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Reviewed-by: selsta <selsta@sent.at>
Reviewed-by: SChernykh
This commit is contained in:
jeffro256
2026-02-24 17:13:37 -06:00
parent bba6aa518b
commit 2eed71e575
5 changed files with 362 additions and 4 deletions
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src/cryptonote_basic/cryptonote_format_utils.cpp
+8 -4
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@@ -718,15 +718,19 @@ namespace cryptonote
{
CHECK_AND_ASSERT_MES(extra_nonce.size() <= TX_EXTRA_NONCE_MAX_COUNT, false, "extra nonce could be 255 bytes max");
size_t start_pos = tx_extra.size();
tx_extra.resize(tx_extra.size() + 2 + extra_nonce.size());
const std::size_t len_varint_bytes = tools::get_varint_byte_size(extra_nonce.size());
tx_extra.resize(tx_extra.size() + 1 + len_varint_bytes + extra_nonce.size());
//write tag
tx_extra[start_pos] = TX_EXTRA_NONCE;
//write len
++start_pos;
tx_extra[start_pos] = static_cast<uint8_t>(extra_nonce.size());
unsigned char * vp = tx_extra.data() + start_pos;
tools::write_varint(vp, extra_nonce.size());
assert(vp == tx_extra.data() + tx_extra.size() - extra_nonce.size());
//write data
++start_pos;
memcpy(&tx_extra[start_pos], extra_nonce.data(), extra_nonce.size());
start_pos += len_varint_bytes;
if (!extra_nonce.empty())
memcpy(&tx_extra[start_pos], extra_nonce.data(), extra_nonce.size());
return true;
}
//---------------------------------------------------------------