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coinjoin_tests.cpp
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// Copyright (c) 2020-2021 The Dash Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <test/test_jagoancoin.h>
#include <amount.h>
#include <coinjoin/coinjoin-util.h>
#include <coinjoin/coinjoin.h>
#include <consensus/validation.h>
#include <validation.h>
#include <wallet/wallet.h>
#include <boost/test/unit_test.hpp>
BOOST_FIXTURE_TEST_SUITE(coinjoin_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(coinjoin_collateral_tests)
{
// Good collateral values
BOOST_CHECK(CCoinJoin::IsCollateralAmount(0.00010000 * COIN));
BOOST_CHECK(CCoinJoin::IsCollateralAmount(0.00012345 * COIN));
BOOST_CHECK(CCoinJoin::IsCollateralAmount(0.00032123 * COIN));
BOOST_CHECK(CCoinJoin::IsCollateralAmount(0.00019000 * COIN));
// Bad collateral values
BOOST_CHECK(!CCoinJoin::IsCollateralAmount(0.00009999 * COIN));
BOOST_CHECK(!CCoinJoin::IsCollateralAmount(0.00040001 * COIN));
BOOST_CHECK(!CCoinJoin::IsCollateralAmount(0.00100000 * COIN));
BOOST_CHECK(!CCoinJoin::IsCollateralAmount(0.00100001 * COIN));
}
class CTransactionBuilderTestSetup : public TestChain100Setup
{
public:
CTransactionBuilderTestSetup()
{
CreateAndProcessBlock({}, GetScriptForRawPubKey(coinbaseKey.GetPubKey()));
wallet = MakeUnique<CWallet>(WalletLocation(), WalletDatabase::CreateMock());
bool firstRun;
wallet->LoadWallet(firstRun);
AddWallet(wallet);
{
LOCK(wallet->cs_wallet);
wallet->AddKeyPubKey(coinbaseKey, coinbaseKey.GetPubKey());
}
WalletRescanReserver reserver(wallet.get());
reserver.reserve();
wallet->ScanForWalletTransactions(chainActive.Genesis(), nullptr, reserver);
}
~CTransactionBuilderTestSetup()
{
RemoveWallet(wallet);
}
std::shared_ptr<CWallet> wallet;
CWalletTx& AddTxToChain(uint256 nTxHash)
{
auto it = wallet->mapWallet.find(nTxHash);
assert(it != wallet->mapWallet.end());
CMutableTransaction blocktx;
{
LOCK(wallet->cs_wallet);
blocktx = CMutableTransaction(*it->second.tx);
}
CreateAndProcessBlock({blocktx}, GetScriptForRawPubKey(coinbaseKey.GetPubKey()));
LOCK2(cs_main, wallet->cs_wallet);
it->second.SetMerkleBranch(chainActive.Tip(), 1);
return it->second;
}
CompactTallyItem GetTallyItem(const std::vector<CAmount>& vecAmounts)
{
CompactTallyItem tallyItem;
CTransactionRef tx;
CReserveKey destKey(wallet.get());
CReserveKey reserveKey(wallet.get());
CAmount nFeeRet;
int nChangePosRet = -1;
std::string strError;
CCoinControl coinControl;
CPubKey pubKey;
BOOST_CHECK(destKey.GetReservedKey(pubKey, false));
tallyItem.txdest = pubKey.GetID();
for (CAmount nAmount : vecAmounts) {
BOOST_CHECK(wallet->CreateTransaction({{GetScriptForDestination(tallyItem.txdest), nAmount, false}}, tx, reserveKey, nFeeRet, nChangePosRet, strError, coinControl));
CValidationState state;
BOOST_CHECK(wallet->CommitTransaction(tx, {}, {}, {}, reserveKey, nullptr, state));
AddTxToChain(tx->GetHash());
for (size_t n = 0; n < tx->vout.size(); ++n) {
if (nChangePosRet != -1 && n == nChangePosRet) {
// Skip the change output to only return the requested coins
continue;
}
tallyItem.vecInputCoins.emplace_back(tx, n);
tallyItem.nAmount += tx->vout[n].nValue;
}
}
assert(tallyItem.vecInputCoins.size() == vecAmounts.size());
destKey.KeepKey();
return tallyItem;
}
};
BOOST_FIXTURE_TEST_CASE(CTransactionBuilderTest, CTransactionBuilderTestSetup)
{
// NOTE: Mock wallet version is FEATURE_BASE which means that it uses uncompressed pubkeys
// (65 bytes instead of 33 bytes), so CTxIn size is 180 bytes, not 148 bytes as one might expect.
// Each output is 34 bytes, vin and vout compact sizes are 1 byte each.
// Therefore base size (i.e. for a tx with 1 input, 0 outputs) is expected to be
// 4(n32bitVersion) + 1(vin size) + 180(vin[0]) + 1(vout size) + 4(nLockTime) = 190 bytes.
minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
// Tests with single outpoint tallyItem
{
CompactTallyItem tallyItem = GetTallyItem({5000});
CTransactionBuilder txBuilder(wallet, tallyItem);
BOOST_CHECK_EQUAL(txBuilder.CountOutputs(), 0);
BOOST_CHECK_EQUAL(txBuilder.GetAmountInitial(), tallyItem.nAmount);
BOOST_CHECK_EQUAL(txBuilder.GetAmountLeft(), 4810); // 5000 - 190
BOOST_CHECK(txBuilder.CouldAddOutput(4776)); // 4810 - 34
BOOST_CHECK(!txBuilder.CouldAddOutput(4777));
BOOST_CHECK(txBuilder.CouldAddOutput(0));
BOOST_CHECK(!txBuilder.CouldAddOutput(-1));
BOOST_CHECK(txBuilder.CouldAddOutputs({1000, 1000, 2708})); // (4810 - 34 * 3) split in 3 outputs
BOOST_CHECK(!txBuilder.CouldAddOutputs({1000, 1000, 2709}));
BOOST_CHECK_EQUAL(txBuilder.AddOutput(5000), nullptr);
BOOST_CHECK_EQUAL(txBuilder.AddOutput(-1), nullptr);
CTransactionBuilderOutput* output = txBuilder.AddOutput();
BOOST_CHECK(output->UpdateAmount(txBuilder.GetAmountLeft()));
BOOST_CHECK(output->UpdateAmount(1));
BOOST_CHECK(output->UpdateAmount(output->GetAmount() + txBuilder.GetAmountLeft()));
BOOST_CHECK(!output->UpdateAmount(output->GetAmount() + 1));
BOOST_CHECK(!output->UpdateAmount(0));
BOOST_CHECK(!output->UpdateAmount(-1));
BOOST_CHECK_EQUAL(txBuilder.CountOutputs(), 1);
std::string strResult;
BOOST_CHECK(txBuilder.Commit(strResult));
CWalletTx& wtx = AddTxToChain(uint256S(strResult));
BOOST_CHECK_EQUAL(wtx.tx->vout.size(), txBuilder.CountOutputs()); // should have no change output
BOOST_CHECK_EQUAL(wtx.tx->vout[0].nValue, output->GetAmount());
BOOST_CHECK(wtx.tx->vout[0].scriptPubKey == output->GetScript());
}
// Tests with multiple outpoint tallyItem
{
CompactTallyItem tallyItem = GetTallyItem({10000, 20000, 30000, 40000, 50000});
CTransactionBuilder txBuilder(wallet, tallyItem);
std::vector<CTransactionBuilderOutput*> vecOutputs;
std::string strResult;
auto output = txBuilder.AddOutput(100);
BOOST_CHECK(output != nullptr);
BOOST_CHECK(!txBuilder.Commit(strResult));
if (output != nullptr) {
output->UpdateAmount(1000);
vecOutputs.push_back(output);
}
while (vecOutputs.size() < 100) {
output = txBuilder.AddOutput(1000 + vecOutputs.size());
if (output == nullptr) {
break;
}
vecOutputs.push_back(output);
}
BOOST_CHECK_EQUAL(vecOutputs.size(), 100);
BOOST_CHECK_EQUAL(txBuilder.CountOutputs(), vecOutputs.size());
BOOST_CHECK(txBuilder.Commit(strResult));
CWalletTx& wtx = AddTxToChain(uint256S(strResult));
BOOST_CHECK_EQUAL(wtx.tx->vout.size(), txBuilder.CountOutputs() + 1); // should have change output
for (const auto& out : wtx.tx->vout) {
auto it = std::find_if(vecOutputs.begin(), vecOutputs.end(), [&](CTransactionBuilderOutput* output) -> bool {
return output->GetAmount() == out.nValue && output->GetScript() == out.scriptPubKey;
});
if (it != vecOutputs.end()) {
vecOutputs.erase(it);
} else {
// change output
BOOST_CHECK_EQUAL(txBuilder.GetAmountLeft() - 34, out.nValue);
}
}
BOOST_CHECK(vecOutputs.size() == 0);
}
}
BOOST_AUTO_TEST_SUITE_END()