498 lines
17 KiB
C++
498 lines
17 KiB
C++
#include "chainparams.h"
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#include "consensus/params.h"
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#include "consensus/validation.h"
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#include "key_io.h"
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#include "main.h"
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#include "pubkey.h"
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#include "rpc/protocol.h"
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#include "transaction_builder.h"
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#include "utiltest.h"
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#include "zcash/Address.hpp"
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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extern ZCJoinSplit* params;
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// Fake an empty view
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class TransactionBuilderCoinsViewDB : public CCoinsView {
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public:
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std::map<uint256, SproutMerkleTree> sproutTrees;
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TransactionBuilderCoinsViewDB() {}
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bool GetSproutAnchorAt(const uint256 &rt, SproutMerkleTree &tree) const {
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auto it = sproutTrees.find(rt);
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if (it != sproutTrees.end()) {
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tree = it->second;
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return true;
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} else {
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return false;
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}
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}
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bool GetSaplingAnchorAt(const uint256 &rt, SaplingMerkleTree &tree) const {
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return false;
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}
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bool GetNullifier(const uint256 &nf, ShieldedType type) const {
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return false;
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}
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bool GetCoins(const uint256 &txid, CCoins &coins) const {
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return false;
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}
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bool HaveCoins(const uint256 &txid) const {
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return false;
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}
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uint256 GetBestBlock() const {
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uint256 a;
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return a;
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}
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uint256 GetBestAnchor(ShieldedType type) const {
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uint256 a;
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return a;
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}
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bool BatchWrite(CCoinsMap &mapCoins,
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const uint256 &hashBlock,
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const uint256 &hashSproutAnchor,
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const uint256 &hashSaplingAnchor,
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CAnchorsSproutMap &mapSproutAnchors,
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CAnchorsSaplingMap &mapSaplingAnchors,
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CNullifiersMap &mapSproutNullifiers,
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CNullifiersMap saplingNullifiersMap) {
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return false;
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}
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bool GetStats(CCoinsStats &stats) const {
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return false;
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}
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};
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TEST(TransactionBuilder, TransparentToSapling)
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{
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auto consensusParams = RegtestActivateSapling();
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CBasicKeyStore keystore;
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CKey tsk = AddTestCKeyToKeyStore(keystore);
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auto scriptPubKey = GetScriptForDestination(tsk.GetPubKey().GetID());
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auto sk_from = libzcash::SaplingSpendingKey::random();
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auto fvk_from = sk_from.full_viewing_key();
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auto sk = libzcash::SaplingSpendingKey::random();
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auto expsk = sk.expanded_spending_key();
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auto fvk = sk.full_viewing_key();
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auto ivk = fvk.in_viewing_key();
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libzcash::diversifier_t d = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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auto pk = *ivk.address(d);
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// Create a shielding transaction from transparent to Sapling
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// 0.0005 t-ZEC in, 0.0004 z-ZEC out, 0.0001 t-ZEC fee
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auto builder = TransactionBuilder(consensusParams, 1, &keystore);
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builder.AddTransparentInput(COutPoint(), scriptPubKey, 50000);
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builder.AddSaplingOutput(fvk_from.ovk, pk, 40000, {});
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 1);
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EXPECT_EQ(tx.vout.size(), 0);
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EXPECT_EQ(tx.vJoinSplit.size(), 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 0);
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EXPECT_EQ(tx.vShieldedOutput.size(), 1);
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EXPECT_EQ(tx.valueBalance, -40000);
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CValidationState state;
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EXPECT_TRUE(ContextualCheckTransaction(tx, state, Params(), 2, 0));
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EXPECT_EQ(state.GetRejectReason(), "");
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// Revert to default
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RegtestDeactivateSapling();
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}
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TEST(TransactionBuilder, SaplingToSapling) {
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auto consensusParams = RegtestActivateSapling();
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auto sk = libzcash::SaplingSpendingKey::random();
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auto expsk = sk.expanded_spending_key();
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auto fvk = sk.full_viewing_key();
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auto pa = sk.default_address();
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auto testNote = GetTestSaplingNote(pa, 40000);
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// Create a Sapling-only transaction
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// 0.0004 z-ZEC in, 0.00025 z-ZEC out, 0.0001 t-ZEC fee, 0.00005 z-ZEC change
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auto builder = TransactionBuilder(consensusParams, 2);
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builder.AddSaplingSpend(expsk, testNote.note, testNote.tree.root(), testNote.tree.witness());
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// Check that trying to add a different anchor fails
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// TODO: the following check can be split out in to another test
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ASSERT_THROW(builder.AddSaplingSpend(expsk, testNote.note, uint256(), testNote.tree.witness()), UniValue);
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builder.AddSaplingOutput(fvk.ovk, pa, 25000, {});
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 0);
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EXPECT_EQ(tx.vout.size(), 0);
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EXPECT_EQ(tx.vJoinSplit.size(), 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 1);
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EXPECT_EQ(tx.vShieldedOutput.size(), 2);
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EXPECT_EQ(tx.valueBalance, 10000);
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CValidationState state;
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EXPECT_TRUE(ContextualCheckTransaction(tx, state, Params(), 3, 0));
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EXPECT_EQ(state.GetRejectReason(), "");
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// Revert to default
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RegtestDeactivateSapling();
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}
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TEST(TransactionBuilder, SaplingToSprout) {
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auto consensusParams = RegtestActivateSapling();
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auto sk = libzcash::SaplingSpendingKey::random();
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auto expsk = sk.expanded_spending_key();
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auto pa = sk.default_address();
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auto testNote = GetTestSaplingNote(pa, 40000);
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auto sproutSk = libzcash::SproutSpendingKey::random();
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auto sproutAddr = sproutSk.address();
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// Create a Sapling-to-Sprout transaction (reusing the note from above)
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// - 0.0004 Sapling-ZEC in - 0.00025 Sprout-ZEC out
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// - 0.00005 Sapling-ZEC change
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// - 0.0001 t-ZEC fee
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auto builder = TransactionBuilder(consensusParams, 2, nullptr, params);
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builder.AddSaplingSpend(expsk, testNote.note, testNote.tree.root(), testNote.tree.witness());
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builder.AddSproutOutput(sproutAddr, 25000);
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 0);
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EXPECT_EQ(tx.vout.size(), 0);
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EXPECT_EQ(tx.vJoinSplit.size(), 1);
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EXPECT_EQ(tx.vJoinSplit[0].vpub_old, 25000);
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EXPECT_EQ(tx.vJoinSplit[0].vpub_new, 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 1);
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EXPECT_EQ(tx.vShieldedOutput.size(), 1);
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EXPECT_EQ(tx.valueBalance, 35000);
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CValidationState state;
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EXPECT_TRUE(ContextualCheckTransaction(tx, state, Params(), 3, 0));
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EXPECT_EQ(state.GetRejectReason(), "");
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// Revert to default
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RegtestDeactivateSapling();
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}
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TEST(TransactionBuilder, SproutToSproutAndSapling) {
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auto consensusParams = RegtestActivateSapling();
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auto sk = libzcash::SaplingSpendingKey::random();
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auto fvk = sk.full_viewing_key();
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auto pa = sk.default_address();
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auto sproutSk = libzcash::SproutSpendingKey::random();
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auto sproutAddr = sproutSk.address();
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auto wtx = GetValidSproutReceive(*params, sproutSk, 25000, true);
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auto sproutNote = GetSproutNote(*params, sproutSk, wtx, 0, 1);
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SproutMerkleTree sproutTree;
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for (int i = 0; i < ZC_NUM_JS_OUTPUTS; i++) {
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sproutTree.append(wtx.vJoinSplit[0].commitments[i]);
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}
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SproutWitness sproutWitness = sproutTree.witness();
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// Fake a view with the Sprout note in it
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auto rt = sproutTree.root();
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TransactionBuilderCoinsViewDB fakeDB;
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fakeDB.sproutTrees.insert(std::pair<uint256, SproutMerkleTree>(rt, sproutTree));
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CCoinsViewCache view(&fakeDB);
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// Create a Sprout-to-[Sprout-and-Sapling] transaction
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// - 0.00025 Sprout-ZEC in - 0.00006 Sprout-ZEC out
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// - 0.00004 Sprout-ZEC out
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// - 0.00005 Sprout-ZEC change
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// - 0.00005 Sapling-ZEC out
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// - 0.00005 t-ZEC fee
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auto builder = TransactionBuilder(consensusParams, 2, nullptr, params, &view);
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builder.SetFee(5000);
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builder.AddSproutInput(sproutSk, sproutNote, sproutWitness);
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builder.AddSproutOutput(sproutAddr, 6000);
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builder.AddSproutOutput(sproutAddr, 4000);
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builder.AddSaplingOutput(fvk.ovk, pa, 5000);
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 0);
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EXPECT_EQ(tx.vout.size(), 0);
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// TODO: This should be doable in two JoinSplits.
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// There's an inefficiency in the implementation.
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EXPECT_EQ(tx.vJoinSplit.size(), 3);
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EXPECT_EQ(tx.vJoinSplit[0].vpub_old, 0);
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EXPECT_EQ(tx.vJoinSplit[0].vpub_new, 0);
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EXPECT_EQ(tx.vJoinSplit[1].vpub_old, 0);
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EXPECT_EQ(tx.vJoinSplit[1].vpub_new, 0);
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EXPECT_EQ(tx.vJoinSplit[2].vpub_old, 0);
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EXPECT_EQ(tx.vJoinSplit[2].vpub_new, 10000);
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EXPECT_EQ(tx.vShieldedSpend.size(), 0);
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EXPECT_EQ(tx.vShieldedOutput.size(), 1);
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EXPECT_EQ(tx.valueBalance, -5000);
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CValidationState state;
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EXPECT_TRUE(ContextualCheckTransaction(tx, state, Params(), 4, 0));
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EXPECT_EQ(state.GetRejectReason(), "");
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// Revert to default
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RegtestDeactivateSapling();
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}
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TEST(TransactionBuilder, ThrowsOnSproutOutputWithoutParams)
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{
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auto consensusParams = Params().GetConsensus();
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auto sk = libzcash::SproutSpendingKey::random();
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auto addr = sk.address();
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auto builder = TransactionBuilder(consensusParams, 1);
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ASSERT_THROW(builder.AddSproutOutput(addr, 10), std::runtime_error);
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}
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TEST(TransactionBuilder, ThrowsOnTransparentInputWithoutKeyStore)
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{
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SelectParams(CBaseChainParams::REGTEST);
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auto consensusParams = Params().GetConsensus();
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auto builder = TransactionBuilder(consensusParams, 1);
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ASSERT_THROW(builder.AddTransparentInput(COutPoint(), CScript(), 1), std::runtime_error);
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}
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TEST(TransactionBuilder, RejectsInvalidTransparentOutput)
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{
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SelectParams(CBaseChainParams::REGTEST);
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auto consensusParams = Params().GetConsensus();
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// Default CTxDestination type is an invalid address
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CTxDestination taddr;
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auto builder = TransactionBuilder(consensusParams, 1);
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ASSERT_THROW(builder.AddTransparentOutput(taddr, 50), UniValue);
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}
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TEST(TransactionBuilder, RejectsInvalidTransparentChangeAddress)
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{
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SelectParams(CBaseChainParams::REGTEST);
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auto consensusParams = Params().GetConsensus();
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// Default CTxDestination type is an invalid address
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CTxDestination taddr;
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auto builder = TransactionBuilder(consensusParams, 1);
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ASSERT_THROW(builder.SendChangeTo(taddr), UniValue);
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}
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TEST(TransactionBuilder, FailsWithNegativeChange)
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{
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auto consensusParams = RegtestActivateSapling();
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// Generate dummy Sapling address
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auto sk = libzcash::SaplingSpendingKey::random();
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auto expsk = sk.expanded_spending_key();
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auto fvk = sk.full_viewing_key();
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auto pa = sk.default_address();
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// Set up dummy transparent address
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CBasicKeyStore keystore;
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CKey tsk = AddTestCKeyToKeyStore(keystore);
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auto tkeyid = tsk.GetPubKey().GetID();
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auto scriptPubKey = GetScriptForDestination(tkeyid);
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CTxDestination taddr = tkeyid;
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auto testNote = GetTestSaplingNote(pa, 59999);
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// Fail if there is only a Sapling output
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// 0.0005 z-ZEC out, 0.0001 t-ZEC fee
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auto builder = TransactionBuilder(consensusParams, 1);
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builder.AddSaplingOutput(fvk.ovk, pa, 50000, {});
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EXPECT_EQ("Change cannot be negative", builder.Build().GetError());
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// Fail if there is only a transparent output
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// 0.0005 t-ZEC out, 0.0001 t-ZEC fee
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builder = TransactionBuilder(consensusParams, 1, &keystore);
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builder.AddTransparentOutput(taddr, 50000);
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EXPECT_EQ("Change cannot be negative", builder.Build().GetError());
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// Fails if there is insufficient input
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// 0.0005 t-ZEC out, 0.0001 t-ZEC fee, 0.00059999 z-ZEC in
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builder.AddSaplingSpend(expsk, testNote.note, testNote.tree.root(), testNote.tree.witness());
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EXPECT_EQ("Change cannot be negative", builder.Build().GetError());
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// Succeeds if there is sufficient input
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builder.AddTransparentInput(COutPoint(), scriptPubKey, 1);
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EXPECT_TRUE(builder.Build().IsTx());
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// Revert to default
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RegtestDeactivateSapling();
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}
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TEST(TransactionBuilder, ChangeOutput)
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{
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auto consensusParams = RegtestActivateSapling();
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// Generate dummy Sapling address
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auto sk = libzcash::SaplingSpendingKey::random();
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auto expsk = sk.expanded_spending_key();
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auto pa = sk.default_address();
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auto testNote = GetTestSaplingNote(pa, 25000);
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// Generate change Sapling address
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auto sk2 = libzcash::SaplingSpendingKey::random();
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auto fvkOut = sk2.full_viewing_key();
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auto zChangeAddr = sk2.default_address();
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// Set up dummy transparent address
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CBasicKeyStore keystore;
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CKey tsk = AddTestCKeyToKeyStore(keystore);
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auto tkeyid = tsk.GetPubKey().GetID();
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auto scriptPubKey = GetScriptForDestination(tkeyid);
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CTxDestination taddr = tkeyid;
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// No change address and no Sapling spends
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{
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auto builder = TransactionBuilder(consensusParams, 1, &keystore);
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builder.AddTransparentInput(COutPoint(), scriptPubKey, 25000);
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EXPECT_EQ("Could not determine change address", builder.Build().GetError());
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}
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// Change to the same address as the first Sapling spend
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{
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auto builder = TransactionBuilder(consensusParams, 1, &keystore);
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builder.AddTransparentInput(COutPoint(), scriptPubKey, 25000);
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builder.AddSaplingSpend(expsk, testNote.note, testNote.tree.root(), testNote.tree.witness());
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 1);
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EXPECT_EQ(tx.vout.size(), 0);
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EXPECT_EQ(tx.vJoinSplit.size(), 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 1);
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EXPECT_EQ(tx.vShieldedOutput.size(), 1);
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EXPECT_EQ(tx.valueBalance, -15000);
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}
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// Change to a Sapling address
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{
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auto builder = TransactionBuilder(consensusParams, 1, &keystore);
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builder.AddTransparentInput(COutPoint(), scriptPubKey, 25000);
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builder.SendChangeTo(zChangeAddr, fvkOut.ovk);
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 1);
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EXPECT_EQ(tx.vout.size(), 0);
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EXPECT_EQ(tx.vJoinSplit.size(), 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 0);
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EXPECT_EQ(tx.vShieldedOutput.size(), 1);
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EXPECT_EQ(tx.valueBalance, -15000);
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}
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// Change to a transparent address
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{
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auto builder = TransactionBuilder(consensusParams, 1, &keystore);
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builder.AddTransparentInput(COutPoint(), scriptPubKey, 25000);
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builder.SendChangeTo(taddr);
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 1);
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EXPECT_EQ(tx.vout.size(), 1);
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EXPECT_EQ(tx.vJoinSplit.size(), 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 0);
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EXPECT_EQ(tx.vShieldedOutput.size(), 0);
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EXPECT_EQ(tx.valueBalance, 0);
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EXPECT_EQ(tx.vout[0].nValue, 15000);
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}
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// Revert to default
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RegtestDeactivateSapling();
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}
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TEST(TransactionBuilder, SetFee)
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{
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auto consensusParams = RegtestActivateSapling();
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// Generate dummy Sapling address
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auto sk = libzcash::SaplingSpendingKey::random();
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auto expsk = sk.expanded_spending_key();
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auto fvk = sk.full_viewing_key();
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auto pa = sk.default_address();
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auto testNote = GetTestSaplingNote(pa, 50000);
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// Default fee
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{
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auto builder = TransactionBuilder(consensusParams, 1);
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builder.AddSaplingSpend(expsk, testNote.note, testNote.tree.root(), testNote.tree.witness());
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builder.AddSaplingOutput(fvk.ovk, pa, 25000, {});
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 0);
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EXPECT_EQ(tx.vout.size(), 0);
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EXPECT_EQ(tx.vJoinSplit.size(), 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 1);
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EXPECT_EQ(tx.vShieldedOutput.size(), 2);
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EXPECT_EQ(tx.valueBalance, 10000);
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}
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// Configured fee
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{
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auto builder = TransactionBuilder(consensusParams, 1);
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builder.AddSaplingSpend(expsk, testNote.note, testNote.tree.root(), testNote.tree.witness());
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builder.AddSaplingOutput(fvk.ovk, pa, 25000, {});
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builder.SetFee(20000);
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auto tx = builder.Build().GetTxOrThrow();
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EXPECT_EQ(tx.vin.size(), 0);
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EXPECT_EQ(tx.vout.size(), 0);
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EXPECT_EQ(tx.vJoinSplit.size(), 0);
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EXPECT_EQ(tx.vShieldedSpend.size(), 1);
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EXPECT_EQ(tx.vShieldedOutput.size(), 2);
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EXPECT_EQ(tx.valueBalance, 20000);
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}
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// Revert to default
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RegtestDeactivateSapling();
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}
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TEST(TransactionBuilder, CheckSaplingTxVersion)
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{
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SelectParams(CBaseChainParams::REGTEST);
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UpdateNetworkUpgradeParameters(Consensus::UPGRADE_OVERWINTER, Consensus::NetworkUpgrade::ALWAYS_ACTIVE);
|
|
auto consensusParams = Params().GetConsensus();
|
|
|
|
auto sk = libzcash::SaplingSpendingKey::random();
|
|
auto expsk = sk.expanded_spending_key();
|
|
auto pk = sk.default_address();
|
|
|
|
// Cannot add Sapling outputs to a non-Sapling transaction
|
|
auto builder = TransactionBuilder(consensusParams, 1);
|
|
try {
|
|
builder.AddSaplingOutput(uint256(), pk, 12345, {});
|
|
} catch (std::runtime_error const & err) {
|
|
EXPECT_EQ(err.what(), std::string("TransactionBuilder cannot add Sapling output to pre-Sapling transaction"));
|
|
} catch(...) {
|
|
FAIL() << "Expected std::runtime_error";
|
|
}
|
|
|
|
// Cannot add Sapling spends to a non-Sapling transaction
|
|
libzcash::SaplingNote note(pk, 50000);
|
|
SaplingMerkleTree tree;
|
|
try {
|
|
builder.AddSaplingSpend(expsk, note, uint256(), tree.witness());
|
|
} catch (std::runtime_error const & err) {
|
|
EXPECT_EQ(err.what(), std::string("TransactionBuilder cannot add Sapling spend to pre-Sapling transaction"));
|
|
} catch(...) {
|
|
FAIL() << "Expected std::runtime_error";
|
|
}
|
|
|
|
// Revert to default
|
|
UpdateNetworkUpgradeParameters(Consensus::UPGRADE_OVERWINTER, Consensus::NetworkUpgrade::NO_ACTIVATION_HEIGHT);
|
|
}
|