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| author | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2018-11-23 12:11:51 +0000 |
|---|---|---|
| committer | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2019-03-05 11:58:16 +0000 |
| commit | 9feda0eeba34ca6c23e6e7fd819d00932b3ce5aa (patch) | |
| tree | 97a04369dd9a6373ec030af498792cba5f2ebf5d | |
| parent | core: avoid double parsing blocks after hoh (diff) | |
| download | monero-9feda0eeba34ca6c23e6e7fd819d00932b3ce5aa.tar.xz | |
cryptonote: speed up calculating coinbase tx prunable hash
It's a hash of an empty buffer, so we can avoid keccak
| -rw-r--r-- | src/cryptonote_basic/cryptonote_format_utils.cpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/cryptonote_basic/cryptonote_format_utils.cpp b/src/cryptonote_basic/cryptonote_format_utils.cpp index e0033b682..f4e7c9d36 100644 --- a/src/cryptonote_basic/cryptonote_format_utils.cpp +++ b/src/cryptonote_basic/cryptonote_format_utils.cpp @@ -981,11 +981,15 @@ namespace cryptonote { if (t.version == 1) return false; + static const crypto::hash empty_hash = { (char)0x70, (char)0xa4, (char)0x85, (char)0x5d, (char)0x04, (char)0xd8, (char)0xfa, (char)0x7b, (char)0x3b, (char)0x27, (char)0x82, (char)0xca, (char)0x53, (char)0xb6, (char)0x00, (char)0xe5, (char)0xc0, (char)0x03, (char)0xc7, (char)0xdc, (char)0xb2, (char)0x7d, (char)0x7e, (char)0x92, (char)0x3c, (char)0x23, (char)0xf7, (char)0x86, (char)0x01, (char)0x46, (char)0xd2, (char)0xc5 }; const unsigned int unprunable_size = t.unprunable_size; if (blob && unprunable_size) { CHECK_AND_ASSERT_MES(unprunable_size <= blob->size(), false, "Inconsistent transaction unprunable and blob sizes"); - cryptonote::get_blob_hash(epee::span<const char>(blob->data() + unprunable_size, blob->size() - unprunable_size), res); + if (blob->size() - unprunable_size == 0) + res = empty_hash; + else + cryptonote::get_blob_hash(epee::span<const char>(blob->data() + unprunable_size, blob->size() - unprunable_size), res); } else { @@ -997,7 +1001,10 @@ namespace cryptonote const size_t mixin = t.vin.empty() ? 0 : t.vin[0].type() == typeid(txin_to_key) ? boost::get<txin_to_key>(t.vin[0]).key_offsets.size() - 1 : 0; bool r = tt.rct_signatures.p.serialize_rctsig_prunable(ba, t.rct_signatures.type, inputs, outputs, mixin); CHECK_AND_ASSERT_MES(r, false, "Failed to serialize rct signatures prunable"); - cryptonote::get_blob_hash(ss.str(), res); + if (ss.str().empty()) + res = empty_hash; + else + cryptonote::get_blob_hash(ss.str(), res); } return true; } |