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Added merkle_hash_full_tree

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SChernykh 2023-10-21 22:45:07 +02:00
parent b46da74c2c
commit e51af9e6e8
3 changed files with 190 additions and 2 deletions
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58
src/merkle.cpp
View file

@ -57,4 +57,62 @@ void merkle_hash(const std::vector<hash>& hashes, hash& root)
}
}
void merkle_hash_full_tree(const std::vector<hash>& hashes, std::vector<std::vector<hash>>& tree)
{
const size_t count = hashes.size();
const uint8_t* h = hashes[0].h;
tree.clear();
if (count == 1) {
tree.push_back(hashes);
}
else if (count == 2) {
hash tmp;
keccak(h, HASH_SIZE * 2, tmp.h);
tree.reserve(2);
tree.push_back(hashes);
tree.emplace_back(1, tmp);
}
else {
size_t cnt = 1, height = 1;
do {
cnt <<= 1;
++height;
} while (cnt <= count);
cnt >>= 1;
tree.reserve(height);
tree.push_back(hashes);
tree.emplace_back(cnt);
{
std::vector<hash>& cur = tree.back();
const size_t k = cnt * 2 - count;
memcpy(cur.data(), h, k * HASH_SIZE);
for (size_t i = k, j = k; j < cnt; i += 2, ++j) {
keccak(h + i * HASH_SIZE, HASH_SIZE * 2, cur[j].h);
}
}
while (cnt > 1) {
cnt >>= 1;
tree.emplace_back(cnt);
const std::vector<hash>& prev = tree[tree.size() - 2];
std::vector<hash>& cur = tree[tree.size() - 1];
cur.resize(cnt);
for (size_t i = 0, j = 0; j < cnt; i += 2, ++j) {
keccak(prev[i].h, HASH_SIZE * 2, cur[j].h);
}
}
}
}
} // namespace p2pool

1
src/merkle.h
View file

@ -20,5 +20,6 @@
namespace p2pool {
void merkle_hash(const std::vector<hash>& hashes, hash& root);
void merkle_hash_full_tree(const std::vector<hash>& hashes, std::vector<std::vector<hash>>& tree);
} // namespace p2pool

133
tests/src/merkle_tests.cpp
View file

@ -24,19 +24,57 @@ namespace p2pool {
TEST(merkle, root_hash)
{
hash input[5];
hash input[10];
uint8_t data[] = "data 0";
for (size_t i = 0; i < 5; ++i, ++data[sizeof(data) - 2]) {
for (size_t i = 0; i < 10; ++i, ++data[sizeof(data) - 2]) {
keccak(data, sizeof(data) - 1, input[i].h);
}
hash root;
std::vector<hash> hashes(1, input[0]);
auto check_full_tree = [&hashes, &root]() {
std::vector<std::vector<hash>> tree;
merkle_hash_full_tree(hashes, tree);
ASSERT_GE(tree.size(), 1);
const std::vector<hash>& tree_root = tree.back();
ASSERT_EQ(tree_root.size(), 1);
ASSERT_EQ(tree_root[0], root);
ASSERT_EQ(tree[0], hashes);
if (tree.size() > 1) {
ASSERT_LE(tree[1].size(), hashes.size());
ASSERT_GE(tree[1].size() * 2, hashes.size());
const size_t spill_size = tree[1].size() * 2 - hashes.size();
for (size_t i = 0; i < spill_size; ++i) {
ASSERT_EQ(tree[1][i], hashes[i]);
}
for (size_t i = spill_size, j = spill_size; i < tree[1].size(); ++i, j += 2) {
hash tmp;
keccak(hashes[j].h, HASH_SIZE * 2, tmp.h);
ASSERT_EQ(tmp, tree[1][i]);
}
}
for (size_t i = tree.size() - 1; i > 1; --i) {
ASSERT_EQ(tree[i].size() * 2, tree[i - 1].size());
for (size_t j = 0; j < tree[i].size(); ++j) {
hash tmp;
keccak(tree[i - 1][j * 2].h, HASH_SIZE * 2, tmp.h);
ASSERT_EQ(tmp, tree[i][j]);
}
}
};
// 1 leaf
merkle_hash(hashes, root);
ASSERT_EQ(root, input[0]);
check_full_tree();
// 2 leaves
hashes.push_back(input[1]);
@ -45,6 +83,7 @@ TEST(merkle, root_hash)
hash check[8];
keccak(input[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 3 leaves
hashes.push_back(input[2]);
@ -54,6 +93,7 @@ TEST(merkle, root_hash)
check[0] = input[0];
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 4 leaves
hashes.push_back(input[3]);
@ -63,6 +103,7 @@ TEST(merkle, root_hash)
keccak(input[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 5 leaves
hashes.push_back(input[4]);
@ -76,6 +117,94 @@ TEST(merkle, root_hash)
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 6 leaves
hashes.push_back(input[5]);
merkle_hash(hashes, root);
check[0] = input[0];
check[1] = input[1];
keccak(input[2].h, HASH_SIZE * 2, check[2].h);
keccak(input[4].h, HASH_SIZE * 2, check[3].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 7 leaves
hashes.push_back(input[6]);
merkle_hash(hashes, root);
check[0] = input[0];
keccak(input[1].h, HASH_SIZE * 2, check[1].h);
keccak(input[3].h, HASH_SIZE * 2, check[2].h);
keccak(input[5].h, HASH_SIZE * 2, check[3].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 8 leaves
hashes.push_back(input[7]);
merkle_hash(hashes, root);
keccak(input[0].h, HASH_SIZE * 2, check[0].h);
keccak(input[2].h, HASH_SIZE * 2, check[1].h);
keccak(input[4].h, HASH_SIZE * 2, check[2].h);
keccak(input[6].h, HASH_SIZE * 2, check[3].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 9 leaves
hashes.push_back(input[8]);
merkle_hash(hashes, root);
for (size_t i = 0; i < 7; ++i) {
check[i] = input[i];
}
keccak(input[7].h, HASH_SIZE * 2, check[7].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[4].h, HASH_SIZE * 2, check[2].h);
keccak(check[6].h, HASH_SIZE * 2, check[3].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
// 10 leaves
hashes.push_back(input[9]);
merkle_hash(hashes, root);
for (size_t i = 0; i < 6; ++i) {
check[i] = input[i];
}
keccak(input[6].h, HASH_SIZE * 2, check[6].h);
keccak(input[8].h, HASH_SIZE * 2, check[7].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[4].h, HASH_SIZE * 2, check[2].h);
keccak(check[6].h, HASH_SIZE * 2, check[3].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
keccak(check[2].h, HASH_SIZE * 2, check[1].h);
keccak(check[0].h, HASH_SIZE * 2, check[0].h);
ASSERT_EQ(root, check[0]);
check_full_tree();
}
}