Implement CurveTrees & CurveTreesUnitTest classes to simplify callers

tests/unit_tests/curve_trees.h

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+// Copyright (c) 2014, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// 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.
+
+#pragma once
+
+#include "fcmp/curve_trees.h"
+#include "fcmp/tower_cycle.h"
+#include "misc_log_ex.h"
+
+using Helios = fcmp::tower_cycle::helios::Helios;
+using Selene = fcmp::tower_cycle::selene::Selene;
+
+// TODO: make this the instantiation in curve_trees.h/.cpp
+using CurveTreesV1 = fcmp::CurveTrees<Helios, Selene>;
+
+class CurveTreesUnitTest
+{
+public:
+    CurveTreesUnitTest(CurveTreesV1 &curve_trees): m_curve_trees(curve_trees) {};
+
+//member structs
+public:
+    template<typename C>
+    using Layer = std::vector<typename C::Point>;
+
+    // A complete tree, useful for testing (don't want to keep the whole tree in memory during normal operation)
+    struct Tree final
+    {
+        std::vector<CurveTreesV1::LeafTuple> leaves;
+        std::vector<Layer<Helios>> c1_layers;
+        std::vector<Layer<Selene>> c2_layers;
+    };
+
+//public member functions
+public:
+    // Read the in-memory tree and get data from last chunks from each layer
+    CurveTreesV1::LastChunks get_last_chunks(const Tree &tree);
+
+    // Use the tree extension to extend the in-memory tree
+    void extend_tree(const CurveTreesV1::TreeExtension &tree_extension, Tree &tree_inout);
+
+    // Validate the in-memory tree by re-hashing every layer, starting from root and working down to leaf layer
+    bool validate_tree(const Tree &tree);
+
+//private member functions
+private:
+    template<typename C_PARENT>
+    bool validate_layer(const C_PARENT &c_parent,
+        const Layer<C_PARENT> &parents,
+        const std::vector<typename C_PARENT::Scalar> &child_scalars,
+        const std::size_t max_chunk_size);
+
+private:
+    CurveTreesV1 &m_curve_trees;
+};