C++ CBasicKeyStore类代码示例

// Explicit calculation which is used to test the wallet constant
// We get the same virtual size due to rounding(weight/4) for both use_max_sig values
static size_t CalculateNestedKeyhashInputSize(bool use_max_sig)
{
    // Generate ephemeral valid pubkey
    CKey key;
    key.MakeNewKey(true);
    CPubKey pubkey = key.GetPubKey();

    // Generate pubkey hash
    uint160 key_hash(Hash160(pubkey.begin(), pubkey.end()));

    // Create inner-script to enter into keystore. Key hash can't be 0...
    CScript inner_script = CScript() << OP_0 << std::vector<unsigned char>(key_hash.begin(), key_hash.end());

    // Create outer P2SH script for the output
    uint160 script_id(Hash160(inner_script.begin(), inner_script.end()));
    CScript script_pubkey = CScript() << OP_HASH160 << std::vector<unsigned char>(script_id.begin(), script_id.end()) << OP_EQUAL;

    // Add inner-script to key store and key to watchonly
    CBasicKeyStore keystore;
    keystore.AddCScript(inner_script);
    keystore.AddKeyPubKey(key, pubkey);

    // Fill in dummy signatures for fee calculation.
    SignatureData sig_data;

    if (!ProduceSignature(keystore, use_max_sig ? DUMMY_MAXIMUM_SIGNATURE_CREATOR : DUMMY_SIGNATURE_CREATOR, script_pubkey, sig_data)) {
        // We're hand-feeding it correct arguments; shouldn't happen
        assert(false);
    }

    CTxIn tx_in;
    UpdateInput(tx_in, sig_data);
    return (size_t)GetVirtualTransactionInputSize(tx_in);
}

//
// Helper: create two dummy transactions, each with
// two outputs.  The first has 11 and 50 CENT outputs
// paid to a TX_PUBKEY, the second 21 and 22 CENT outputs
// paid to a TX_PUBKEYHASH.
// Both are shares.
//
static std::vector<CTransaction>
SetupDummyInputs(CBasicKeyStore& keystoreRet, MapPrevTx& inputsRet)
{
    std::vector<CTransaction> dummyTransactions;
    dummyTransactions.resize(2);

    keystoreRet.SetUnit('S');

    // Add some keys to the keystore:
    CKey key[4];
    for (int i = 0; i < 4; i++)
    {
        key[i].MakeNewKey(i % 2);
        keystoreRet.AddKey(key[i]);
    }

    // Create some dummy input transactions
    dummyTransactions[0].cUnit = 'S';
    dummyTransactions[0].vout.resize(2);
    dummyTransactions[0].vout[0].nValue = 11*CENT;
    dummyTransactions[0].vout[0].scriptPubKey << key[0].GetPubKey() << OP_CHECKSIG;
    dummyTransactions[0].vout[1].nValue = 50*CENT;
    dummyTransactions[0].vout[1].scriptPubKey << key[1].GetPubKey() << OP_CHECKSIG;
    inputsRet[dummyTransactions[0].GetHash()] = make_pair(CTxIndex(), dummyTransactions[0]);

    dummyTransactions[1].cUnit = 'S';
    dummyTransactions[1].vout.resize(2);
    dummyTransactions[1].vout[0].nValue = 21*CENT;
    dummyTransactions[1].vout[0].scriptPubKey.SetDestination(key[2].GetPubKey().GetID());
    dummyTransactions[1].vout[1].nValue = 22*CENT;
    dummyTransactions[1].vout[1].scriptPubKey.SetDestination(key[3].GetPubKey().GetID());
    inputsRet[dummyTransactions[1].GetHash()] = make_pair(CTxIndex(), dummyTransactions[1]);

    return dummyTransactions;
}

TEST(keystore_tests, store_and_retrieve_note_decryptor) {
    CBasicKeyStore keyStore;
    ZCNoteDecryption decOut;

    auto sk = libzcash::SpendingKey::random();
    auto addr = sk.address();

    EXPECT_FALSE(keyStore.GetNoteDecryptor(addr, decOut));

    keyStore.AddSpendingKey(sk);
    EXPECT_TRUE(keyStore.GetNoteDecryptor(addr, decOut));
    EXPECT_EQ(ZCNoteDecryption(sk.viewing_key()), decOut);
}

//
// Helper: create two dummy transactions, each with
// two outputs.  The first has 11 and 50 CENT outputs
// paid to a TX_PUBKEY, the second 21 and 22 CENT outputs
// paid to a TX_PUBKEYHASH.
//
static std::vector<CMutableTransaction>
SetupDummyInputs(CBasicKeyStore& keystoreRet, CCoinsViewCache& coinsRet)
{
    std::vector<CMutableTransaction> dummyTransactions;
    dummyTransactions.resize(2);

    // Add some keys to the keystore:
    CKey key[4];
    for (int i = 0; i < 4; i++)
    {
        key[i].MakeNewKey(i % 2);
        keystoreRet.AddKey(key[i]);
    }

    // Create some dummy input transactions
    dummyTransactions[0].vout.resize(2);
    dummyTransactions[0].vout[0].nValue = 11*CENT;
    dummyTransactions[0].vout[0].scriptPubKey << ToByteVector(key[0].GetPubKey()) << OP_CHECKSIG;
    dummyTransactions[0].vout[1].nValue = 50*CENT;
    dummyTransactions[0].vout[1].scriptPubKey << ToByteVector(key[1].GetPubKey()) << OP_CHECKSIG;
    coinsRet.ModifyCoins(dummyTransactions[0].GetHash())->FromTx(dummyTransactions[0], 0);

    dummyTransactions[1].vout.resize(2);
    dummyTransactions[1].vout[0].nValue = 21*CENT;
    dummyTransactions[1].vout[0].scriptPubKey = GetScriptForDestination(key[2].GetPubKey().GetID());
    dummyTransactions[1].vout[1].nValue = 22*CENT;
    dummyTransactions[1].vout[1].scriptPubKey = GetScriptForDestination(key[3].GetPubKey().GetID());
    coinsRet.ModifyCoins(dummyTransactions[1].GetHash())->FromTx(dummyTransactions[1], 0);

    return dummyTransactions;
}

bool TestChainForComputingMediansSetup::GenerateRandomTransaction(CTransaction& txNew)
{
    CAmount amountToSend = 5000;
    std::vector<CTransaction> res;

    CKey key;
    key.MakeNewKey(true);
    CScript scriptPubKey = CScript() << ToByteVector(key.GetPubKey())
            << OP_CHECKSIG;

    CBasicKeyStore keystore;
    keystore.AddKeyPubKey(coinbaseKey, coinbaseKey.GetPubKey());

    CTransaction utxo = coinbaseTxns[0];
    coinbaseTxns.erase(coinbaseTxns.begin());

    txNew.nLockTime = chainActive.Height();
    txNew.vin.clear();
    txNew.vout.clear();

    for (int j = 0; j < nOutputs; ++j) {
        CTxOut txout(amountToSend, scriptPubKey);
        txNew.vout.push_back(txout);
    }

    //vin
    CTxIn vin = CTxIn(utxo.GetHash(), 0, CScript(),
            std::numeric_limits<unsigned int>::max() - 1);
    txNew.vin.push_back(vin);

    //previous tx's script pub key that we need to sign
    CScript& scriptSigRes = txNew.vin[0].scriptSig;
    CTransaction txNewConst(txNew);
    ProduceSignature(TransactionSignatureCreator(&keystore, &txNewConst, 0),
            utxo.vout[0].scriptPubKey, scriptSigRes);
    res.push_back(txNew);

    return true;
}

static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
{
    int nHashType = SIGHASH_ALL;

    if (flagStr.size() > 0)
        if (!findSighashFlags(nHashType, flagStr))
            throw runtime_error("unknown sighash flag/sign option");

    vector<CTransaction> txVariants;
    txVariants.push_back(tx);

    // mergedTx will end up with all the signatures; it
    // starts as a clone of the raw tx:
    CMutableTransaction mergedTx(txVariants[0]);
    bool fComplete = true;
    CCoinsView viewDummy;
    CCoinsViewCache view(&viewDummy);

    if (!registers.count("privatekeys"))
        throw runtime_error("privatekeys register variable must be set.");
    bool fGivenKeys = false;
    CBasicKeyStore tempKeystore;
    UniValue keysObj = registers["privatekeys"];
    fGivenKeys = true;

    for (unsigned int kidx = 0; kidx < keysObj.size(); kidx++) {
        if (!keysObj[kidx].isStr())
            throw runtime_error("privatekey not a string");
        COnlineSecret vchSecret;
        bool fGood = vchSecret.SetString(keysObj[kidx].getValStr());
        if (!fGood)
            throw runtime_error("privatekey not valid");

        CKey key = vchSecret.GetKey();
        tempKeystore.AddKey(key);
    }

    // Add previous txouts given in the RPC call:
    if (!registers.count("prevtxs"))
        throw runtime_error("prevtxs register variable must be set.");
    UniValue prevtxsObj = registers["prevtxs"];
    {
        for (unsigned int previdx = 0; previdx < prevtxsObj.size(); previdx++) {
            UniValue prevOut = prevtxsObj[previdx];
            if (!prevOut.isObject())
                throw runtime_error("expected prevtxs internal object");

            map<string,UniValue::VType> types = boost::assign::map_list_of("txid", UniValue::VSTR)("vout",UniValue::VNUM)("scriptPubKey",UniValue::VSTR);
            if (!prevOut.checkObject(types))
                throw runtime_error("prevtxs internal object typecheck fail");

            uint256 txid = ParseHashUV(prevOut["txid"], "txid");

            int nOut = atoi(prevOut["vout"].getValStr());
            if (nOut < 0)
                throw runtime_error("vout must be positive");

            vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey"));
            CScript scriptPubKey(pkData.begin(), pkData.end());

            {
                CCoinsModifier coins = view.ModifyCoins(txid);
                if (coins->IsAvailable(nOut) && coins->vout[nOut].scriptPubKey != scriptPubKey) {
                    string err("Previous output scriptPubKey mismatch:\n");
                    err = err + coins->vout[nOut].scriptPubKey.ToString() + "\nvs:\n"+
                        scriptPubKey.ToString();
                    throw runtime_error(err);
                }
                if ((unsigned int)nOut >= coins->vout.size())
                    coins->vout.resize(nOut+1);
                coins->vout[nOut].scriptPubKey = scriptPubKey;
                coins->vout[nOut].nValue = 0; // we don't know the actual output value
            }

            // if redeemScript given and private keys given,
            // add redeemScript to the tempKeystore so it can be signed:
            if (fGivenKeys && scriptPubKey.IsPayToScriptHash() &&
                prevOut.exists("redeemScript")) {
                UniValue v = prevOut["redeemScript"];
                vector<unsigned char> rsData(ParseHexUV(v, "redeemScript"));
                CScript redeemScript(rsData.begin(), rsData.end());
                tempKeystore.AddCScript(redeemScript);
            }
        }
    }

    const CKeyStore& keystore = tempKeystore;

    bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);

    // Sign what we can:
    for (unsigned int i = 0; i < mergedTx.vin.size(); i++) {
        CTxIn& txin = mergedTx.vin[i];
        const CCoins* coins = view.AccessCoins(txin.prevout.hash);
        if (!coins || !coins->IsAvailable(txin.prevout.n)) {
            fComplete = false;
            continue;
        }
        const CScript& prevPubKey = coins->vout[txin.prevout.n].scriptPubKey;

//.........这里部分代码省略.........

//.........这里部分代码省略.........
            txVariants.push_back(tx);
        }
        catch (const std::exception&) {
            throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
        }
    }

    if (txVariants.empty())
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Missing transaction");

    // mergedTx will end up with all the signatures; it
    // starts as a clone of the rawtx:
    CMutableTransaction mergedTx(txVariants[0]);

    // Fetch previous transactions (inputs):
    CCoinsView viewDummy;
    CCoinsViewCache view(&viewDummy);
    {
        LOCK(mempool.cs);
        CCoinsViewCache &viewChain = *pcoinsTip;
        CCoinsViewMemPool viewMempool(&viewChain, mempool);
        view.SetBackend(viewMempool); // temporarily switch cache backend to db+mempool view

        BOOST_FOREACH(const CTxIn& txin, mergedTx.vin) {
            const uint256& prevHash = txin.prevout.hash;
            CCoins coins;
            view.AccessCoins(prevHash); // this is certainly allowed to fail
        }

        view.SetBackend(viewDummy); // switch back to avoid locking mempool for too long
    }

    bool fGivenKeys = false;
    CBasicKeyStore tempKeystore;
    if (params.size() > 2 && !params[2].isNull()) {
        fGivenKeys = true;
        UniValue keys = params[2].get_array();
        for (unsigned int idx = 0; idx < keys.size(); idx++) {
            UniValue k = keys[idx];
            CBitcoinSecret vchSecret;
            bool fGood = vchSecret.SetString(k.get_str());
            if (!fGood)
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
            CKey key = vchSecret.GetKey();
            if (!key.IsValid())
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Private key outside allowed range");
            tempKeystore.AddKey(key);
        }
    }
#ifdef ENABLE_WALLET
    else if (pwalletMain)
        EnsureWalletIsUnlocked();
#endif

    // Add previous txouts given in the RPC call:
    if (params.size() > 1 && !params[1].isNull()) {
        UniValue prevTxs = params[1].get_array();
        for (unsigned int idx = 0; idx < prevTxs.size(); idx++) {
            const UniValue& p = prevTxs[idx];
            if (!p.isObject())
                throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "expected object with {\"txid'\",\"vout\",\"scriptPubKey\"}");

            UniValue prevOut = p.get_obj();

            RPCTypeCheckObj(prevOut,
                {

BOOST_FIXTURE_TEST_CASE(checkinputs_test, TestChain100Setup)
{
    // Test that passing CheckInputs with one set of script flags doesn't imply
    // that we would pass again with a different set of flags.
    {
        LOCK(cs_main);
        InitScriptExecutionCache();
    }

    CScript p2pk_scriptPubKey = CScript() << ToByteVector(coinbaseKey.GetPubKey()) << OP_CHECKSIG;
    CScript p2sh_scriptPubKey = GetScriptForDestination(CScriptID(p2pk_scriptPubKey));
    CScript p2pkh_scriptPubKey = GetScriptForDestination(coinbaseKey.GetPubKey().GetID());
    CScript p2wpkh_scriptPubKey = GetScriptForWitness(p2pkh_scriptPubKey);

    CBasicKeyStore keystore;
    keystore.AddKey(coinbaseKey);
    keystore.AddCScript(p2pk_scriptPubKey);

    // flags to test: SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY, SCRIPT_VERIFY_CHECKSEQUENCE_VERIFY, SCRIPT_VERIFY_NULLDUMMY, uncompressed pubkey thing

    // Create 2 outputs that match the three scripts above, spending the first
    // coinbase tx.
    CMutableTransaction spend_tx;

    spend_tx.nVersion = 1;
    spend_tx.vin.resize(1);
    spend_tx.vin[0].prevout.hash = m_coinbase_txns[0]->GetHash();
    spend_tx.vin[0].prevout.n = 0;
    spend_tx.vout.resize(4);
    spend_tx.vout[0].nValue = 11*CENT;
    spend_tx.vout[0].scriptPubKey = p2sh_scriptPubKey;
    spend_tx.vout[1].nValue = 11*CENT;
    spend_tx.vout[1].scriptPubKey = p2wpkh_scriptPubKey;
    spend_tx.vout[2].nValue = 11*CENT;
    spend_tx.vout[2].scriptPubKey = CScript() << OP_CHECKLOCKTIMEVERIFY << OP_DROP << ToByteVector(coinbaseKey.GetPubKey()) << OP_CHECKSIG;
    spend_tx.vout[3].nValue = 11*CENT;
    spend_tx.vout[3].scriptPubKey = CScript() << OP_CHECKSEQUENCEVERIFY << OP_DROP << ToByteVector(coinbaseKey.GetPubKey()) << OP_CHECKSIG;

    // Sign, with a non-DER signature
    {
        std::vector<unsigned char> vchSig;
        uint256 hash = SignatureHash(p2pk_scriptPubKey, spend_tx, 0, SIGHASH_ALL, 0, SigVersion::BASE);
        BOOST_CHECK(coinbaseKey.Sign(hash, vchSig));
        vchSig.push_back((unsigned char) 0); // padding byte makes this non-DER
        vchSig.push_back((unsigned char)SIGHASH_ALL);
        spend_tx.vin[0].scriptSig << vchSig;
    }

    // Test that invalidity under a set of flags doesn't preclude validity
    // under other (eg consensus) flags.
    // spend_tx is invalid according to DERSIG
    {
        LOCK(cs_main);

        CValidationState state;
        PrecomputedTransactionData ptd_spend_tx(spend_tx);

        BOOST_CHECK(!CheckInputs(spend_tx, state, pcoinsTip.get(), true, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_DERSIG, true, true, ptd_spend_tx, nullptr));

        // If we call again asking for scriptchecks (as happens in
        // ConnectBlock), we should add a script check object for this -- we're
        // not caching invalidity (if that changes, delete this test case).
        std::vector<CScriptCheck> scriptchecks;
        BOOST_CHECK(CheckInputs(spend_tx, state, pcoinsTip.get(), true, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_DERSIG, true, true, ptd_spend_tx, &scriptchecks));
        BOOST_CHECK_EQUAL(scriptchecks.size(), 1U);

        // Test that CheckInputs returns true iff DERSIG-enforcing flags are
        // not present.  Don't add these checks to the cache, so that we can
        // test later that block validation works fine in the absence of cached
        // successes.
        ValidateCheckInputsForAllFlags(spend_tx, SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_LOW_S | SCRIPT_VERIFY_STRICTENC, false);
    }

    // And if we produce a block with this tx, it should be valid (DERSIG not
    // enabled yet), even though there's no cache entry.
    CBlock block;

    block = CreateAndProcessBlock({spend_tx}, p2pk_scriptPubKey);
    BOOST_CHECK(chainActive.Tip()->GetBlockHash() == block.GetHash());
    BOOST_CHECK(pcoinsTip->GetBestBlock() == block.GetHash());

    LOCK(cs_main);

    // Test P2SH: construct a transaction that is valid without P2SH, and
    // then test validity with P2SH.
    {
        CMutableTransaction invalid_under_p2sh_tx;
        invalid_under_p2sh_tx.nVersion = 1;
        invalid_under_p2sh_tx.vin.resize(1);
        invalid_under_p2sh_tx.vin[0].prevout.hash = spend_tx.GetHash();
        invalid_under_p2sh_tx.vin[0].prevout.n = 0;
        invalid_under_p2sh_tx.vout.resize(1);
        invalid_under_p2sh_tx.vout[0].nValue = 11*CENT;
        invalid_under_p2sh_tx.vout[0].scriptPubKey = p2pk_scriptPubKey;
        std::vector<unsigned char> vchSig2(p2pk_scriptPubKey.begin(), p2pk_scriptPubKey.end());
        invalid_under_p2sh_tx.vin[0].scriptSig << vchSig2;

        ValidateCheckInputsForAllFlags(invalid_under_p2sh_tx, SCRIPT_VERIFY_P2SH, true);
    }

//.........这里部分代码省略.........

bool MultisigDialog::signMultisigTx(CMutableTransaction& tx, string& errorOut, QVBoxLayout* keyList)
{
    //will be set false if all inputs are not fully signed(valid)
    bool fComplete = true;

    //if keyslist is not default value AND has items in list then true
    bool fGivenKeys = (keyList != nullptr) && (keyList->count() > 0);

    try{

        //copy of vin for reference before vin is mutated
        vector<CTxIn> oldVin(tx.vin);
        CBasicKeyStore privKeystore;

        //if keys were given, attempt to collect redeem and scriptpubkey
        if(fGivenKeys){
            for(int i = 0; i < keyList->count(); i++){
                QWidget* keyFrame = qobject_cast<QWidget*>(keyList->itemAt(i)->widget());
                QLineEdit* key = keyFrame->findChild<QLineEdit*>("key");
                CBitcoinSecret vchSecret;
                if (!vchSecret.SetString(key->text().toStdString()))
                    throw runtime_error("Invalid private key");
                CKey cKey = vchSecret.GetKey();
                if (!cKey.IsValid())
                    throw runtime_error("Private key outside allowed range");
                privKeystore.AddKey(cKey);
            }

            for(CTxIn& txin : tx.vin){
                //get inputs
                CTransaction txVin;
                uint256 hashBlock;
                if (!GetTransaction(txin.prevout.hash, txVin, hashBlock, true))
                    throw runtime_error("txin could not be found");

                if (hashBlock == 0)
                    throw runtime_error("txin is unconfirmed");

                //get pubkey from input
                CScript prevPubKey = txVin.vout[txin.prevout.n].scriptPubKey;

                //get payment destination
                CTxDestination address;
                if(!ExtractDestination(prevPubKey, address)){
                    throw runtime_error("Could not find address for destination.");
                }

                //get redeem script related to destination
                CScriptID hash = boost::get<CScriptID>(address);
                CScript redeemScript;

                if (!pwalletMain->GetCScript(hash, redeemScript)){
                    errorOut = "could not redeem";
                }
                privKeystore.AddCScript(redeemScript);
            }
        }else{
            if (model->getEncryptionStatus() == model->Locked) {
                if (!model->requestUnlock(true).isValid()) {
                    // Unlock wallet was cancelled
                    throw runtime_error("Error: Your wallet is locked. Please enter the wallet passphrase first.");
                }
            }
        }

        //choose between local wallet and provided
        const CKeyStore& keystore = fGivenKeys ? privKeystore : *pwalletMain;

        //attempt to sign each input from local wallet
        int nIn = 0;
        for(CTxIn& txin : tx.vin){
            //get inputs
            CTransaction txVin;
            uint256 hashBlock;
            if (!GetTransaction(txin.prevout.hash, txVin, hashBlock, true))
                throw runtime_error("txin could not be found");

            if (hashBlock == 0)
                throw runtime_error("txin is unconfirmed");

            txin.scriptSig.clear();
            CScript prevPubKey = txVin.vout[txin.prevout.n].scriptPubKey;

            //sign what we can
            SignSignature(keystore, prevPubKey, tx, nIn);

            //merge in any previous signatures
            txin.scriptSig = CombineSignatures(prevPubKey, tx, nIn, txin.scriptSig, oldVin[nIn].scriptSig);

            if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&tx, nIn))){
                fComplete = false;
            }
            nIn++;
        }

        ui->signButtonStatus->setText(buildMultisigTxStatusString(fComplete, tx));

    }catch(const runtime_error& e){
        errorOut = string(e.what());
        fComplete = false;
//.........这里部分代码省略.........

static void MutateTxSign(CMutableTransaction& tx, const std::string& flagStr)
{
    int nHashType = SIGHASH_ALL;

    if (flagStr.size() > 0)
        if (!findSighashFlags(nHashType, flagStr))
            throw std::runtime_error("unknown sighash flag/sign option");

    // mergedTx will end up with all the signatures; it
    // starts as a clone of the raw tx:
    CMutableTransaction mergedTx{tx};
    const CMutableTransaction txv{tx};
    CCoinsView viewDummy;
    CCoinsViewCache view(&viewDummy);

    if (!registers.count("privatekeys"))
        throw std::runtime_error("privatekeys register variable must be set.");
    CBasicKeyStore tempKeystore;
    UniValue keysObj = registers["privatekeys"];

    for (unsigned int kidx = 0; kidx < keysObj.size(); kidx++) {
        if (!keysObj[kidx].isStr())
            throw std::runtime_error("privatekey not a std::string");
        CKey key = DecodeSecret(keysObj[kidx].getValStr());
        if (!key.IsValid()) {
            throw std::runtime_error("privatekey not valid");
        }
        tempKeystore.AddKey(key);
    }

    // Add previous txouts given in the RPC call:
    if (!registers.count("prevtxs"))
        throw std::runtime_error("prevtxs register variable must be set.");
    UniValue prevtxsObj = registers["prevtxs"];
    {
        for (unsigned int previdx = 0; previdx < prevtxsObj.size(); previdx++) {
            UniValue prevOut = prevtxsObj[previdx];
            if (!prevOut.isObject())
                throw std::runtime_error("expected prevtxs internal object");

            std::map<std::string, UniValue::VType> types = {
                {"txid", UniValue::VSTR},
                {"vout", UniValue::VNUM},
                {"scriptPubKey", UniValue::VSTR},
            };
            if (!prevOut.checkObject(types))
                throw std::runtime_error("prevtxs internal object typecheck fail");

            uint256 txid = ParseHashStr(prevOut["txid"].get_str(), "txid");

            int nOut = atoi(prevOut["vout"].getValStr());
            if (nOut < 0)
                throw std::runtime_error("vout must be positive");

            COutPoint out(txid, nOut);
            std::vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey"));
            CScript scriptPubKey(pkData.begin(), pkData.end());

            {
                const Coin& coin = view.AccessCoin(out);
                if (!coin.IsSpent() && coin.out.scriptPubKey != scriptPubKey) {
                    std::string err("Previous output scriptPubKey mismatch:\n");
                    err = err + ScriptToAsmStr(coin.out.scriptPubKey) + "\nvs:\n"+
                        ScriptToAsmStr(scriptPubKey);
                    throw std::runtime_error(err);
                }
                Coin newcoin;
                newcoin.out.scriptPubKey = scriptPubKey;
                newcoin.out.nValue = 0;
                if (prevOut.exists("amount")) {
                    newcoin.out.nValue = AmountFromValue(prevOut["amount"]);
                }
                newcoin.nHeight = 1;
                view.AddCoin(out, std::move(newcoin), true);
            }

            // if redeemScript given and private keys given,
            // add redeemScript to the tempKeystore so it can be signed:
            if ((scriptPubKey.IsPayToScriptHash() || scriptPubKey.IsPayToWitnessScriptHash()) &&
                prevOut.exists("redeemScript")) {
                UniValue v = prevOut["redeemScript"];
                std::vector<unsigned char> rsData(ParseHexUV(v, "redeemScript"));
                CScript redeemScript(rsData.begin(), rsData.end());
                tempKeystore.AddCScript(redeemScript);
            }
        }
    }

    const CKeyStore& keystore = tempKeystore;

    bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);

    // Sign what we can:
    for (unsigned int i = 0; i < mergedTx.vin.size(); i++) {
        CTxIn& txin = mergedTx.vin[i];
        const Coin& coin = view.AccessCoin(txin.prevout);
        if (coin.IsSpent()) {
            continue;
        }
        const CScript& prevPubKey = coin.out.scriptPubKey;
//.........这里部分代码省略.........

UniValue signrawtransaction(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() < 1 || params.size() > 4)
        throw runtime_error(
            "signrawtransaction <hex string> [{\"txid\":txid,\"vout\":n,\"scriptPubKey\":hex,\"redeemScript\":hex},...] [<privatekey1>,...] [sighashtype=\"ALL\"]\n"
            "Sign inputs for raw transaction (serialized, hex-encoded).\n"
            "Second optional argument (may be null) is an array of previous transaction outputs that\n"
            "this transaction depends on but may not yet be in the blockchain.\n"
            "Third optional argument (may be null) is an array of base58-encoded private\n"
            "keys that can also be used to sign the transaction.\n"
            "Fourth optional argument is a string that is one of six values; ALL, NONE, SINGLE or\n"
            "ALL|ANYONECANPAY, NONE|ANYONECANPAY, SINGLE|ANYONECANPAY.\n"
            "Returns json object with keys:\n"
            "  hex : raw transaction with signature(s) (hex-encoded string)\n"
            "  complete : 1 if transaction has a complete set of signature (0 if not)"
#ifdef ENABLE_WALLET
            + HelpRequiringPassphrase()
#endif
            );

    RPCTypeCheck(params, list_of(UniValue::VSTR)(UniValue::VARR)(UniValue::VARR)(UniValue::VSTR), true);

    vector<unsigned char> txData(ParseHex(params[0].get_str()));
    CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION);
    vector<CTransaction> txVariants;
    while (!ssData.empty())
    {
        try {
            CTransaction tx;
            ssData >> tx;
            txVariants.push_back(tx);
        }
        catch (std::exception &e) {
            throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
        }
    }

    if (txVariants.empty())
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Missing transaction");

    // mergedTx will end up with all the signatures; it
    // starts as a clone of the rawtx:
    CTransaction mergedTx(txVariants[0]);
    bool fComplete = true;

    // Fetch previous transactions (inputs):
    map<COutPoint, CScript> mapPrevOut;
    for (unsigned int i = 0; i < mergedTx.vin.size(); i++)
    {
        CTransaction tempTx;
        MapPrevTx mapPrevTx;
        CTxDB txdb("r");
        map<uint256, CTxIndex> unused;
        bool fInvalid;

        // FetchInputs aborts on failure, so we go one at a time.
        tempTx.vin.push_back(mergedTx.vin[i]);
        tempTx.FetchInputs(txdb, unused, false, false, mapPrevTx, fInvalid);

        // Copy results into mapPrevOut:
        BOOST_FOREACH(const CTxIn& txin, tempTx.vin)
        {
            const uint256& prevHash = txin.prevout.hash;
            if (mapPrevTx.count(prevHash) && mapPrevTx[prevHash].second.vout.size()>txin.prevout.n)
                mapPrevOut[txin.prevout] = mapPrevTx[prevHash].second.vout[txin.prevout.n].scriptPubKey;
        }
    }

    bool fGivenKeys = false;
#ifdef ENABLE_WALLET
    CMergedKeyStore tempKeystore(pwalletMain);
#else
    CBasicKeyStore tempKeystore;
#endif
    if (params.size() > 2 && !params[2].isNull())
    {
        fGivenKeys = true;
        UniValue keys = params[2].get_array();

        for (unsigned int idx = 0; idx < keys.size(); idx++) 
        {
            CBitcoinSecret vchSecret;
            bool fGood = vchSecret.SetString(keys[idx].get_str());
            if (!fGood)
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
            CKey key = vchSecret.GetKey();

            // 5TY1TqhFLax7w7Hoa6YtrejzoAuWTf5Tf1RKSvVED9tadmUMYjX and Lg7s3TveHSrHbpmAZ5Vmt9an6nim2f4gekrLRR5bJeEfT2fXkRoT are the zero privkey
            // they pass the above check, but aren't valid privkeys
            if (!key.IsValid()) {
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
            }
            tempKeystore.AddKey(key);
        }
    }
#ifdef ENABLE_WALLET
    else
        EnsureWalletIsUnlocked();
#endif

//.........这里部分代码省略.........

double benchmark_large_tx()
{
    // Number of inputs in the spending transaction that we will simulate
    const size_t NUM_INPUTS = 555;

    // Create priv/pub key
    CKey priv;
    priv.MakeNewKey(false);
    auto pub = priv.GetPubKey();
    CBasicKeyStore tempKeystore;
    tempKeystore.AddKey(priv);

    // The "original" transaction that the spending transaction will spend
    // from.
    CMutableTransaction m_orig_tx;
    m_orig_tx.vout.resize(1);
    m_orig_tx.vout[0].nValue = 1000000;
    CScript prevPubKey = GetScriptForDestination(pub.GetID());
    m_orig_tx.vout[0].scriptPubKey = prevPubKey;

    auto orig_tx = CTransaction(m_orig_tx);

    CMutableTransaction spending_tx;
    auto input_hash = orig_tx.GetHash();
    // Add NUM_INPUTS inputs
    for (size_t i = 0; i < NUM_INPUTS; i++) {
        spending_tx.vin.emplace_back(input_hash, 0);
    }

    // Sign for all the inputs
    for (size_t i = 0; i < NUM_INPUTS; i++) {
        SignSignature(tempKeystore, prevPubKey, spending_tx, i, SIGHASH_ALL);
    }

    // Serialize:
    {
        CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
        ss << spending_tx;
        //std::cout << "SIZE OF SPENDING TX: " << ss.size() << std::endl;

        auto error = MAX_TX_SIZE / 20; // 5% error
        assert(ss.size() < MAX_TX_SIZE + error);
        assert(ss.size() > MAX_TX_SIZE - error);
    }

    // Spending tx has all its inputs signed and does not need to be mutated anymore
    CTransaction final_spending_tx(spending_tx);

    // Benchmark signature verification costs:
    struct timeval tv_start;
    timer_start(tv_start);
    for (size_t i = 0; i < NUM_INPUTS; i++) {
        ScriptError serror = SCRIPT_ERR_OK;
        assert(VerifyScript(final_spending_tx.vin[i].scriptSig,
                            prevPubKey,
                            STANDARD_SCRIPT_VERIFY_FLAGS,
                            TransactionSignatureChecker(&final_spending_tx, i),
                            &serror));
    }
    return timer_stop(tv_start);
}

UniValue signrawtransaction(const JSONRPCRequest& request)
{
#ifdef ENABLE_WALLET
    CWallet * const pwallet = GetWalletForJSONRPCRequest(request);
#endif

    if (request.fHelp || request.params.size() < 1 || request.params.size() > 4)
        throw std::runtime_error(
            "signrawtransaction \"hexstring\" ( [{\"txid\":\"id\",\"vout\":n,\"scriptPubKey\":\"hex\",\"redeemScript\":\"hex\"},...] [\"privatekey1\",...] sighashtype )\n"
            "\nSign inputs for raw transaction (serialized, hex-encoded).\n"
            "The second optional argument (may be null) is an array of previous transaction outputs that\n"
            "this transaction depends on but may not yet be in the block chain.\n"
            "The third optional argument (may be null) is an array of base58-encoded private\n"
            "keys that, if given, will be the only keys used to sign the transaction.\n"
#ifdef ENABLE_WALLET
            + HelpRequiringPassphrase(pwallet) + "\n"
#endif

            "\nArguments:\n"
            "1. \"hexstring\"     (string, required) The transaction hex string\n"
            "2. \"prevtxs\"       (string, optional) An json array of previous dependent transaction outputs\n"
            "     [               (json array of json objects, or 'null' if none provided)\n"
            "       {\n"
            "         \"txid\":\"id\",             (string, required) The transaction id\n"
            "         \"vout\":n,                  (numeric, required) The output number\n"
            "         \"scriptPubKey\": \"hex\",   (string, required) script key\n"
            "         \"redeemScript\": \"hex\",   (string, required for P2SH or P2WSH) redeem script\n"
            "         \"amount\": value            (numeric, required) The amount spent\n"
            "       }\n"
            "       ,...\n"
            "    ]\n"
            "3. \"privkeys\"     (string, optional) A json array of base58-encoded private keys for signing\n"
            "    [                  (json array of strings, or 'null' if none provided)\n"
            "      \"privatekey\"   (string) private key in base58-encoding\n"
            "      ,...\n"
            "    ]\n"
            "4. \"sighashtype\"     (string, optional, default=ALL) The signature hash type. Must be one of\n"
            "       \"ALL\"\n"
            "       \"NONE\"\n"
            "       \"SINGLE\"\n"
            "       \"ALL|ANYONECANPAY\"\n"
            "       \"NONE|ANYONECANPAY\"\n"
            "       \"SINGLE|ANYONECANPAY\"\n"

            "\nResult:\n"
            "{\n"
            "  \"hex\" : \"value\",           (string) The hex-encoded raw transaction with signature(s)\n"
            "  \"complete\" : true|false,   (boolean) If the transaction has a complete set of signatures\n"
            "  \"errors\" : [                 (json array of objects) Script verification errors (if there are any)\n"
            "    {\n"
            "      \"txid\" : \"hash\",           (string) The hash of the referenced, previous transaction\n"
            "      \"vout\" : n,                (numeric) The index of the output to spent and used as input\n"
            "      \"scriptSig\" : \"hex\",       (string) The hex-encoded signature script\n"
            "      \"sequence\" : n,            (numeric) Script sequence number\n"
            "      \"error\" : \"text\"           (string) Verification or signing error related to the input\n"
            "    }\n"
            "    ,...\n"
            "  ]\n"
            "}\n"

            "\nExamples:\n"
            + HelpExampleCli("signrawtransaction", "\"myhex\"")
            + HelpExampleRpc("signrawtransaction", "\"myhex\"")
        );

    ObserveSafeMode();
#ifdef ENABLE_WALLET
    LOCK2(cs_main, pwallet ? &pwallet->cs_wallet : nullptr);
#else
    LOCK(cs_main);
#endif
    RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VARR, UniValue::VARR, UniValue::VSTR}, true);

    CMutableTransaction mtx;
    if (!DecodeHexTx(mtx, request.params[0].get_str(), true))
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");

    // Fetch previous transactions (inputs):
    CCoinsView viewDummy;
    CCoinsViewCache view(&viewDummy);
    {
        LOCK(mempool.cs);
        CCoinsViewCache &viewChain = *pcoinsTip;
        CCoinsViewMemPool viewMempool(&viewChain, mempool);
        view.SetBackend(viewMempool); // temporarily switch cache backend to db+mempool view

        for (const CTxIn& txin : mtx.vin) {
            view.AccessCoin(txin.prevout); // Load entries from viewChain into view; can fail.
        }

        view.SetBackend(viewDummy); // switch back to avoid locking mempool for too long
    }

    bool fGivenKeys = false;
    CBasicKeyStore tempKeystore;
    if (!request.params[2].isNull()) {
        fGivenKeys = true;
        UniValue keys = request.params[2].get_array();
        for (unsigned int idx = 0; idx < keys.size(); idx++) {
            UniValue k = keys[idx];
//.........这里部分代码省略.........