diff options
| -rw-r--r-- | src/ringct/multiexp.cc | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/ringct/multiexp.cc b/src/ringct/multiexp.cc index b70d92d46..7ed9672f2 100644 --- a/src/ringct/multiexp.cc +++ b/src/ringct/multiexp.cc @@ -155,7 +155,7 @@ rct::key bos_coster_heap_conv_robust(std::vector<MultiexpData> data) MULTIEXP_PERF(PERF_TIMER_START_UNIT(bos_coster, 1000000)); MULTIEXP_PERF(PERF_TIMER_START_UNIT(setup, 1000000)); size_t points = data.size(); - CHECK_AND_ASSERT_THROW_MES(points > 1, "Not enough points"); + CHECK_AND_ASSERT_THROW_MES(points > 0, "Not enough points"); std::vector<size_t> heap; heap.reserve(points); for (size_t n = 0; n < points; ++n) @@ -164,6 +164,16 @@ rct::key bos_coster_heap_conv_robust(std::vector<MultiexpData> data) heap.push_back(n); } points = heap.size(); + if (points == 0) + return rct::identity(); + if (points < 2) + { + ge_p2 p2; + ge_scalarmult(&p2, data[0].scalar.bytes, &data[0].point); + rct::key res; + ge_tobytes(res.bytes, &p2); + return res; + } auto Comp = [&](size_t e0, size_t e1) { return data[e0].scalar < data[e1].scalar; }; std::make_heap(heap.begin(), heap.end(), Comp); |