bulletproofs: add multi output bulletproofs to rct

1 files changed, 63 insertions, 0 deletions

diff --git a/tests/unit_tests/bulletproofs.cpp b/tests/unit_tests/bulletproofs.cpp
index d3b804530..183bb5167 100644
--- a/tests/unit_tests/bulletproofs.cpp
+++ b/tests/unit_tests/bulletproofs.cpp
@@ -31,7 +31,9 @@
 #include "gtest/gtest.h"
 
 #include "ringct/rctOps.h"
+#include "ringct/rctSigs.h"
 #include "ringct/bulletproofs.h"
+#include "device/device.hpp"
 #include "misc_log_ex.h"
 
 TEST(bulletproofs, valid_zero)
@@ -72,6 +74,67 @@ TEST(bulletproofs, valid_multi_random)
   }
 }
 
+TEST(bulletproofs, multi_splitting)
+{
+  rct::ctkeyV sc, pc;
+  rct::ctkey sctmp, pctmp;
+
+  std::tie(sctmp, pctmp) = rct::ctskpkGen(6000);
+  sc.push_back(sctmp);
+  pc.push_back(pctmp);
+
+  std::tie(sctmp, pctmp) = rct::ctskpkGen(7000);
+  sc.push_back(sctmp);
+  pc.push_back(pctmp);
+
+  const int mixin = 3, max_outputs = 16;
+
+  for (int n_outputs = 1; n_outputs <= max_outputs; ++n_outputs)
+  {
+    std::vector<uint64_t> amounts;
+    rct::keyV amount_keys;
+    rct::keyV destinations;
+    rct::key Sk, Pk;
+    uint64_t available = 6000 + 7000;
+    uint64_t amount;
+    rct::ctkeyM mixRing(mixin+1);
+
+    //add output
+    for (size_t i = 0; i < n_outputs; ++i)
+    {
+      amount = rct::randXmrAmount(available);
+      amounts.push_back(amount);
+      amount_keys.push_back(rct::hash_to_scalar(rct::zero()));
+      rct::skpkGen(Sk, Pk);
+      destinations.push_back(Pk);
+      available -= amount;
+    }
+    if (!amounts.empty())
+      amounts.back() += available;
+
+    for (size_t j = 0; j <= mixin; ++j)
+    {
+      for (size_t i = 0; i < sc.size(); ++i)
+      {
+        if (j == 1)
+          mixRing[j].push_back(pc[i]);
+        else
+          mixRing[j].push_back({rct::scalarmultBase(rct::skGen()), rct::scalarmultBase(rct::skGen())});
+      }
+    }
+
+    rct::ctkeyV outSk;
+    rct::rctSig s = rct::genRct(rct::zero(), sc, destinations, amounts, mixRing, amount_keys, NULL, NULL, 1, outSk, rct::RangeProofMultiOutputBulletproof, hw::get_device("default"));
+    ASSERT_TRUE(rct::verRct(s));
+    for (size_t i = 0; i < n_outputs; ++i)
+    {
+      rct::key mask;
+      rct::decodeRct(s, amount_keys[i], i, mask, hw::get_device("default"));
+      ASSERT_TRUE(mask == outSk[i].mask);
+    }
+  }
+}
+
 
 TEST(bulletproofs, invalid_8)
 {