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Port monero-lws to wownero-lws

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Adapts monero-lws for Wownero cryptocurrency:

- Rename all monero-lws-* binaries to wownero-lws-*
- Update submodule to point to official Wownero repo
- Use Wownero default ports (RPC: 34568, ZMQ: 34569)
- Update data directory to ~/.wownero/light_wallet_server
- Adapt next_difficulty() calls for Wownero API signature

Key technical changes for Wownero compatibility:

- BulletproofPlus (RCTTypeBulletproofPlus, type 8) commitment verification:
  Wownero stores BP+ commitments in 'divided by 8' form. Must call
  rct::scalarmult8() on outPk commitment before comparing with computed
  commitment (mask*G + amount*H). This is essential for amount decryption.

- Pass rct_type to decode_amount() for proper commitment handling

- Handle Wownero's ZMQ JSON format for ecdhTuple (32-byte mask/amount fields)

No fork of Wownero is required - uses official codeberg.org/wownero/wownero.
This commit is contained in:
jwinterm
2026-01-04 13:12:56 -05:00
parent f2b3534002
commit 3427c60315
35 changed files with 789 additions and 395 deletions
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9
src/util/CMakeLists.txt
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@@ -1,4 +1,5 @@
# Copyright (c) 2020, The Monero Project
# Copyright (c) 2024-2025, The Wownero Project
#
# All rights reserved.
#
@@ -26,8 +27,8 @@
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
set(monero-lws-util_sources blocks.cpp gamma_picker.cpp random_outputs.cpp source_location.cpp transactions.cpp)
set(monero-lws-util_headers blocks.h fwd.h gamma_picker.h random_outputs.h source_location.h transactions.h)
set(wownero-lws-util_sources blocks.cpp gamma_picker.cpp random_outputs.cpp source_location.cpp transactions.cpp)
set(wownero-lws-util_headers blocks.h fwd.h gamma_picker.h random_outputs.h source_location.h transactions.h)
add_library(monero-lws-util ${monero-lws-util_sources} ${monero-lws-util_headers})
target_link_libraries(monero-lws-util monero::libraries monero-lws-db)
add_library(wownero-lws-util ${wownero-lws-util_sources} ${wownero-lws-util_headers})
target_link_libraries(wownero-lws-util wownero::libraries wownero-lws-db)

11
src/util/transactions.cpp
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@@ -45,7 +45,7 @@ void lws::decrypt_payment_id(crypto::hash8& out, const crypto::key_derivation& k
out.data[b] ^= hash.data[b];
}
boost::optional<std::pair<std::uint64_t, rct::key>> lws::decode_amount(const rct::key& commitment, const rct::ecdhTuple& info, const crypto::key_derivation& sk, std::size_t index, const bool bulletproof2)
boost::optional<std::pair<std::uint64_t, rct::key>> lws::decode_amount(const rct::key& commitment, const rct::ecdhTuple& info, const crypto::key_derivation& sk, std::size_t index, const bool bulletproof2, const std::uint8_t rct_type)
{
crypto::secret_key scalar{};
crypto::derivation_to_scalar(sk, index, scalar);
@@ -55,7 +55,14 @@ boost::optional<std::pair<std::uint64_t, rct::key>> lws::decode_amount(const rct
rct::key Ctmp;
rct::addKeys2(Ctmp, copy.mask, copy.amount, rct::H);
if (rct::equalKeys(commitment, Ctmp))
// Wownero BulletproofPlus: commitments are stored in "divided by 8" form
// Must multiply by 8 (scalarmult8) before comparing
rct::key C = commitment;
if (rct_type == rct::RCTTypeBulletproofPlus)
C = rct::scalarmult8(C);
if (rct::equalKeys(C, Ctmp))
return {{rct::h2d(copy.amount), copy.mask}};
return boost::none;
}

2
src/util/transactions.h
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@@ -41,5 +41,5 @@ namespace crypto
namespace lws
{
void decrypt_payment_id(crypto::hash8& out, const crypto::key_derivation& key);
boost::optional<std::pair<std::uint64_t, rct::key>> decode_amount(const rct::key& commitment, const rct::ecdhTuple& info, const crypto::key_derivation& sk, std::size_t index, const bool bulletproof2);
boost::optional<std::pair<std::uint64_t, rct::key>> decode_amount(const rct::key& commitment, const rct::ecdhTuple& info, const crypto::key_derivation& sk, std::size_t index, const bool bulletproof2, const std::uint8_t rct_type);
}