CPubKey CKey::GetPubKey() const
{
    int nSize = i2o_ECPublicKey(pkey, NULL);
    if (!nSize)
        throw key_error("CKey::GetPubKey() : i2o_ECPublicKey failed");
    std::vector<unsigned char> vchPubKey(nSize, 0);
    unsigned char* pbegin = &vchPubKey[0];
    if (i2o_ECPublicKey(pkey, &pbegin) != nSize)
        throw key_error("CKey::GetPubKey() : i2o_ECPublicKey returned unexpected size");
    return CPubKey(vchPubKey);
}

unsigned int HaveKeys(const std::vector<valtype>& pubkeys, const CKeyStore& keystore)
{
    unsigned int nResult = 0;
    for (const valtype& pubkey : pubkeys)
    {
        CKeyID keyID = CPubKey(pubkey).GetID();
        if (keystore.HaveKey(keyID))
            ++nResult;
    }
    return nResult;
}

CMasternode::CMasternode()
{
    LOCK(cs);
    vin = CTxIn();
    addr = CService();
    pubkey = CPubKey();
    pubkey2 = CPubKey();
    sig = std::vector<unsigned char>();
    activeState = MASTERNODE_ENABLED;
    sigTime = GetAdjustedTime();
    lastPing = CMasternodePing();
    cacheInputAge = 0;
    cacheInputAgeBlock = 0;
    unitTest = false;
    allowFreeTx = true;
    protocolVersion = PROTOCOL_VERSION;
    nLastDsq = 0;
    nScanningErrorCount = 0;
    nLastScanningErrorBlockHeight = 0;
    lastTimeChecked = 0;
}

static bool SignN(const std::vector<valtype>& multisigdata, const BaseSignatureCreator& creator, const CScript& scriptCode, std::vector<valtype>& ret, SigVersion sigversion)
{
    int nSigned = 0;
    int nRequired = multisigdata.front()[0];
    for (unsigned int i = 1; i < multisigdata.size()-1 && nSigned < nRequired; i++)
    {
        const valtype& pubkey = multisigdata[i];
        CKeyID keyID = CPubKey(pubkey).GetID();
        if (Sign1(keyID, creator, scriptCode, ret, sigversion))
            ++nSigned;
    }
    return nSigned==nRequired;
}

static bool ExtractPubKey(const CScript &dest, CPubKey& pubKeyOut)
{
    //TODO: Use Solver to extract this?
    CScript::const_iterator pc = dest.begin();
    opcodetype opcode;
    std::vector<unsigned char> vch;
    if (!dest.GetOp(pc, opcode, vch) || vch.size() < 33 || vch.size() > 65)
        return false;
    pubKeyOut = CPubKey(vch);
    if (!pubKeyOut.IsFullyValid())
        return false;
    if (!dest.GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG || dest.GetOp(pc, opcode, vch))
        return false;
    return true;
}

CMasternode::CMasternode()
{
    LOCK(cs);
    vin = CTxIn();
    addr = CService();
    pubKeyCollateralAddress = CPubKey();
    pubKeyMasternode = CPubKey();
    sig = std::vector<unsigned char>();
    activeState = MASTERNODE_ENABLED;
    sigTime = GetAdjustedTime();
    lastPing = CMasternodePing();
    cacheInputAge = 0;
    cacheInputAgeBlock = 0;
    unitTest = false;
    allowFreeTx = true;
    nActiveState = MASTERNODE_ENABLED,
    protocolVersion = PROTOCOL_VERSION;
    nLastDsq = 0;
    nScanningErrorCount = 0;
    nLastScanningErrorBlockHeight = 0;
    lastTimeChecked = 0;
    nLastDsee = 0;  // temporary, do not save. Remove after migration to v12
    nLastDseep = 0; // temporary, do not save. Remove after migration to v12
}

CMasternode::CollateralStatus CMasternode::CheckCollateral(const COutPoint& outpoint, const CPubKey& pubkey, int& nHeightRet)
{
    AssertLockHeld(cs_main);

    Coin coin;
    if (!GetUTXOCoin(outpoint, coin)) {
        return COLLATERAL_UTXO_NOT_FOUND;
    }

    if (coin.out.nValue != 25000 * COIN) {
        return COLLATERAL_INVALID_AMOUNT;
    }

    if (pubkey == CPubKey() || coin.out.scriptPubKey != GetScriptForDestination(CScriptID(GetScriptForDestination(WitnessV0KeyHash(pubkey.GetID()))))) {
        return COLLATERAL_INVALID_PUBKEY;
    }

    nHeightRet = coin.nHeight;
    return COLLATERAL_OK;
}

/**
 * Sign scriptPubKey using signature made with creator.
 * Signatures are returned in scriptSigRet (or returns false if scriptPubKey can't be signed),
 * unless whichTypeRet is TX_SCRIPTHASH, in which case scriptSigRet is the redemption script.
 * Returns false if scriptPubKey could not be completely satisfied.
 */
static bool SignStep(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& scriptPubKey,
                     std::vector<valtype>& ret, txnouttype& whichTypeRet, SigVersion sigversion, SignatureData& sigdata)
{
    CScript scriptRet;
    uint160 h160;
    ret.clear();
    std::vector<unsigned char> sig;

    std::vector<valtype> vSolutions;
    if (!Solver(scriptPubKey, whichTypeRet, vSolutions))
        return false;

    switch (whichTypeRet)
    {
    case TX_NONSTANDARD:
    case TX_NULL_DATA:
    case TX_WITNESS_UNKNOWN:
        return false;
    case TX_PUBKEY:
        if (!CreateSig(creator, sigdata, provider, sig, CPubKey(vSolutions[0]), scriptPubKey, sigversion)) return false;
        ret.push_back(std::move(sig));
        return true;
    case TX_PUBKEYHASH: {
        CKeyID keyID = CKeyID(uint160(vSolutions[0]));
        CPubKey pubkey;
        GetPubKey(provider, sigdata, keyID, pubkey);
        if (!CreateSig(creator, sigdata, provider, sig, pubkey, scriptPubKey, sigversion)) return false;
        ret.push_back(std::move(sig));
        ret.push_back(ToByteVector(pubkey));
        return true;
    }
    case TX_SCRIPTHASH:
        if (GetCScript(provider, sigdata, uint160(vSolutions[0]), scriptRet)) {
            ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
            return true;
        }
        return false;

    case TX_MULTISIG: {
        size_t required = vSolutions.front()[0];
        ret.push_back(valtype()); // workaround CHECKMULTISIG bug
        for (size_t i = 1; i < vSolutions.size() - 1; ++i) {
            CPubKey pubkey = CPubKey(vSolutions[i]);
            if (ret.size() < required + 1 && CreateSig(creator, sigdata, provider, sig, pubkey, scriptPubKey, sigversion)) {
                ret.push_back(std::move(sig));
            }
        }
        bool ok = ret.size() == required + 1;
        for (size_t i = 0; i + ret.size() < required + 1; ++i) {
            ret.push_back(valtype());
        }
        return ok;
    }
    case TX_WITNESS_V0_KEYHASH:
        ret.push_back(vSolutions[0]);
        return true;

    case TX_WITNESS_V0_SCRIPTHASH:
        CRIPEMD160().Write(&vSolutions[0][0], vSolutions[0].size()).Finalize(h160.begin());
        if (GetCScript(provider, sigdata, h160, scriptRet)) {
            ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
            return true;
        }
        return false;

    default:
        return false;
    }
}

void CAccount::SetNull()
{
    vchPubKey = CPubKey();
}

// Extracts signatures and scripts from incomplete scriptSigs. Please do not extend this, use PSBT instead
SignatureData DataFromTransaction(const CMutableTransaction& tx, unsigned int nIn, const CTxOut& txout)
{
    SignatureData data;
    assert(tx.vin.size() > nIn);
    data.scriptSig = tx.vin[nIn].scriptSig;
    data.scriptWitness = tx.vin[nIn].scriptWitness;
    Stacks stack(data);

    // Get signatures
    MutableTransactionSignatureChecker tx_checker(&tx, nIn, txout.nValue);
    SignatureExtractorChecker extractor_checker(data, tx_checker);
    if (VerifyScript(data.scriptSig, txout.scriptPubKey, &data.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, extractor_checker)) {
        data.complete = true;
        return data;
    }

    // Get scripts
    txnouttype script_type;
    std::vector<std::vector<unsigned char>> solutions;
    Solver(txout.scriptPubKey, script_type, solutions);
    SigVersion sigversion = SigVersion::BASE;
    CScript next_script = txout.scriptPubKey;

    if (script_type == TX_SCRIPTHASH && !stack.script.empty() && !stack.script.back().empty()) {
        // Get the redeemScript
        CScript redeem_script(stack.script.back().begin(), stack.script.back().end());
        data.redeem_script = redeem_script;
        next_script = std::move(redeem_script);

        // Get redeemScript type
        Solver(next_script, script_type, solutions);
        stack.script.pop_back();
    }
    if (script_type == TX_WITNESS_V0_SCRIPTHASH && !stack.witness.empty() && !stack.witness.back().empty()) {
        // Get the witnessScript
        CScript witness_script(stack.witness.back().begin(), stack.witness.back().end());
        data.witness_script = witness_script;
        next_script = std::move(witness_script);

        // Get witnessScript type
        Solver(next_script, script_type, solutions);
        stack.witness.pop_back();
        stack.script = std::move(stack.witness);
        stack.witness.clear();
        sigversion = SigVersion::WITNESS_V0;
    }
    if (script_type == TX_MULTISIG && !stack.script.empty()) {
        // Build a map of pubkey -> signature by matching sigs to pubkeys:
        assert(solutions.size() > 1);
        unsigned int num_pubkeys = solutions.size()-2;
        unsigned int last_success_key = 0;
        for (const valtype& sig : stack.script) {
            for (unsigned int i = last_success_key; i < num_pubkeys; ++i) {
                const valtype& pubkey = solutions[i+1];
                // We either have a signature for this pubkey, or we have found a signature and it is valid
                if (data.signatures.count(CPubKey(pubkey).GetID()) || extractor_checker.CheckSig(sig, pubkey, next_script, sigversion)) {
                    last_success_key = i + 1;
                    break;
                }
            }
        }
    }

    return data;
}

CMessage::CMessage()
	: m_header( (int)CPayloadKind::Uninitiated, std::vector<unsigned char>(), 0, CPubKey(), uint256(), uint256() )
{
}

isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey, bool& isInvalid, SigVersion sigversion)
{
    std::vector<valtype> vSolutions;
    txnouttype whichType;
    if (!Solver(scriptPubKey, whichType, vSolutions)) {
        if (keystore.HaveWatchOnly(scriptPubKey))
            return ISMINE_WATCH_UNSOLVABLE;
        return ISMINE_NO;
    }

    CKeyID keyID;
    switch (whichType)
    {
    case TX_NONSTANDARD:
    case TX_NULL_DATA:
        break;
    case TX_PUBKEY:
        keyID = CPubKey(vSolutions[0]).GetID();
        if (sigversion != SIGVERSION_BASE && vSolutions[0].size() != 33) {
            isInvalid = true;
            return ISMINE_NO;
        }
        if (keystore.HaveKey(keyID))
            return ISMINE_SPENDABLE;
        break;
    case TX_WITNESS_V0_KEYHASH:
    {
        if (!keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) {
            // We do not support bare witness outputs unless the P2SH version of it would be
            // acceptable as well. This protects against matching before segwit activates.
            // This also applies to the P2WSH case.
            break;
        }
        isminetype ret = ::IsMine(keystore, GetScriptForDestination(CKeyID(uint160(vSolutions[0]))), isInvalid, SIGVERSION_WITNESS_V0);
        if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid))
            return ret;
        break;
    }
    case TX_PUBKEYHASH:
        keyID = CKeyID(uint160(vSolutions[0]));
        if (sigversion != SIGVERSION_BASE) {
            CPubKey pubkey;
            if (keystore.GetPubKey(keyID, pubkey) && !pubkey.IsCompressed()) {
                isInvalid = true;
                return ISMINE_NO;
            }
        }
        if (keystore.HaveKey(keyID))
            return ISMINE_SPENDABLE;
        break;
    case TX_SCRIPTHASH:
    {
        CScriptID scriptID = CScriptID(uint160(vSolutions[0]));
        CScript subscript;
        if (keystore.GetCScript(scriptID, subscript)) {
            isminetype ret = IsMine(keystore, subscript, isInvalid);
            if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid))
                return ret;
        }
        break;
    }
    case TX_WITNESS_V0_SCRIPTHASH:
    {
        if (!keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) {
            break;
        }
        uint160 hash;
        CRIPEMD160().Write(&vSolutions[0][0], vSolutions[0].size()).Finalize(hash.begin());
        CScriptID scriptID = CScriptID(hash);
        CScript subscript;
        if (keystore.GetCScript(scriptID, subscript)) {
            isminetype ret = IsMine(keystore, subscript, isInvalid, SIGVERSION_WITNESS_V0);
            if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid))
                return ret;
        }
        break;
    }

    case TX_MULTISIG:
    {
        // Only consider transactions "mine" if we own ALL the
        // keys involved. Multi-signature transactions that are
        // partially owned (somebody else has a key that can spend
        // them) enable spend-out-from-under-you attacks, especially
        // in shared-wallet situations.
        std::vector<valtype> keys(vSolutions.begin()+1, vSolutions.begin()+vSolutions.size()-1);
        if (sigversion != SIGVERSION_BASE) {
            for (size_t i = 0; i < keys.size(); i++) {
                if (keys[i].size() != 33) {
                    isInvalid = true;
                    return ISMINE_NO;
                }
            }
        }
        if (HaveKeys(keys, keystore) == keys.size())
            return ISMINE_SPENDABLE;
        break;
    }
    }

//.........这里部分代码省略.........

QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
{
    QString strHTML;
    QString explorer(fTestNet ? "http://explorer.butterflycoin.info/" : "http://explorer.butterflycoin.info/");

    LOCK2(cs_main, wallet->cs_wallet);
    strHTML.reserve(4000);
    strHTML += "<html><font face='verdana, arial, helvetica, sans-serif'>";

    int64_t nTime = wtx.GetTxTime();
    int64_t nCredit = wtx.GetCredit();
    int64_t nDebit = wtx.GetDebit();
    int64_t nNet = nCredit - nDebit;

    strHTML += "<b>" + tr("Status") + ":</b> " + FormatTxStatus(wtx);
    int nRequests = wtx.GetRequestCount();
    if (nRequests != -1)
    {
        if (nRequests == 0)
            strHTML += tr(", has not been successfully broadcast yet");
        else if (nRequests > 0)
            strHTML += tr(", broadcast through %n node(s)", "", nRequests);
    };

    strHTML += "<br>";

    strHTML += "<b>" + tr("Date") + ":</b> " + (nTime ? GUIUtil::dateTimeStr(nTime) : "") + "<br>";

    //
    // From
    //
    if (wtx.IsCoinBase() || wtx.IsCoinStake())
    {
        strHTML += "<b>" + tr("Source") + ":</b> " + tr("Generated") + "<br>";
    } else
    if (wtx.mapValue.count("from") && !wtx.mapValue["from"].empty())
    {
        // Online transaction
        strHTML += "<b>" + tr("From") + ":</b> " + GUIUtil::HtmlEscape(wtx.mapValue["from"]) + "<br>";
    } else
    {
        // Offline transaction
        if (nNet > 0)
        {
            // Credit
            BOOST_FOREACH(const CTxOut& txout, wtx.vout)
            {
                if (wtx.nVersion == ANON_TXN_VERSION
                    && txout.IsAnonOutput())
                {
                    const CScript &s = txout.scriptPubKey;
                    CKeyID ckidD = CPubKey(&s[2+1], 33).GetID();
                    std::string sAnonPrefix("ao ");
                    if (wallet->HaveKey(ckidD) && (wallet->mapAddressBook[ckidD].empty() || !wallet->mapAddressBook[ckidD].compare(0, sAnonPrefix.length(), sAnonPrefix) == 0))
                    {
                        strHTML += "<b>" + tr("From") + ":</b> " + tr("unknown") + "<br>";
                        strHTML += "<b>" + tr("To") + ":</b> <a href='"+explorer+"address.asp?address=";
                        strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(ckidD).ToString())+"' target='_blank'>";
                        strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(ckidD).ToString());
                        if (!wallet->mapAddressBook[ckidD].empty())
                            strHTML += " (" + tr("own address") + ", " + tr("label") + ": " + GUIUtil::HtmlEscape(wallet->mapAddressBook[ckidD]) + ")";
                        else
                            strHTML += " (" + tr("own address") + ")";
                        strHTML += "</a><br>";
                    };
                    continue;
                }

                if (wallet->IsMine(txout))
                {
                    CTxDestination address;
                    if (ExtractDestination(txout.scriptPubKey, address) && IsMine(*wallet, address))
                    {
                        if (wallet->mapAddressBook.count(address))
                        {
                            strHTML += "<b>" + tr("From") + ":</b> " + tr("unknown") + "<br>";
                            strHTML += "<b>" + tr("To") + ":</b> <a href='"+explorer+"address.asp?address=";
                            strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(address).ToString())+"' target='_blank'>";
                            strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(address).ToString());
                            if (!wallet->mapAddressBook[address].empty())
                                strHTML += " (" + tr("own address") + ", " + tr("label") + ": " + GUIUtil::HtmlEscape(wallet->mapAddressBook[address]) + ")";
                            else
                                strHTML += " (" + tr("own address") + ")";
                            strHTML += "</a><br>";
                        };
                    };
                    break;
                };
            };
        };
    };

/*
 * Decompose CWallet transaction to model transaction records.
 */
QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *wallet, const CWalletTx &wtx)
{
    QList<TransactionRecord> parts;
    int64_t nTime = wtx.GetTxTime();

    int64_t nCredMOIN, nCredMoinX;
    wtx.GetCredit(nCredMOIN, nCredMoinX, true);
    int64_t nCredit = nCredMOIN + nCredMoinX;
    int64_t nDebit = wtx.GetDebit();
    int64_t nNet = nCredit - nDebit;
    uint256 hash = wtx.GetHash(), hashPrev = 0;
    std::map<std::string, std::string> mapValue = wtx.mapValue;

    char cbuf[256];

    if (wtx.nVersion == ANON_TXN_VERSION)
    {
        if (nNet > 0 && nCredMoinX > 0)
        {
            // -- credit
            TransactionRecord sub(hash, nTime, TransactionRecord::RecvMoinX, "", "", nNet, 0);

            for (unsigned int nOut = 0; nOut < wtx.vout.size(); nOut++)
            {
                // display 1st transaction
                snprintf(cbuf, sizeof(cbuf), "n_%u", nOut);
                mapValue_t::const_iterator mi = wtx.mapValue.find(cbuf);
                if (mi != wtx.mapValue.end() && !mi->second.empty())
                {
                    sub.narration = mi->second;
                    break;
                };
            };

            parts.append(sub);
            return parts;
        } else
        if (nNet <= 0)
        {
            // -- debit
            TransactionRecord sub(hash, nTime, TransactionRecord::SendMoinX, "", "", nNet, 0);

            for (unsigned int nOut = 0; nOut < wtx.vout.size(); nOut++)
            {
                // display 1st transaction
                snprintf(cbuf, sizeof(cbuf), "n_%u", nOut);
                mapValue_t::const_iterator mi = wtx.mapValue.find(cbuf);
                if (mi != wtx.mapValue.end() && !mi->second.empty())
                {
                    sub.narration = mi->second;
                    break;
                }
            };

            parts.append(sub);
            return parts;
        };

        // continue on
    };


    if (nNet > 0 || wtx.IsCoinBase() || wtx.IsCoinStake())
    {
        //
        // Credit
        //

        for (unsigned int nOut = 0; nOut < wtx.vout.size(); nOut++)
        {
            const CTxOut& txout = wtx.vout[nOut];

            if (wtx.nVersion == ANON_TXN_VERSION
                && txout.IsAnonOutput())
            {
                const CScript &s = txout.scriptPubKey;
                CKeyID ckidD = CPubKey(&s[2+1], 33).GetID();

                if (wallet->HaveKey(ckidD))
                {
                    TransactionRecord sub(hash, nTime);
                    sub.idx = parts.size(); // sequence number

                    sub.credit = txout.nValue;

                    sub.type = TransactionRecord::RecvMoinX;
                    sub.address = CBitcoinAddress(ckidD).ToString();
                    //sub.address = wallet->mapAddressBook[ckidD]

                    snprintf(cbuf, sizeof(cbuf), "n_%u", nOut);
                    mapValue_t::const_iterator mi = wtx.mapValue.find(cbuf);
                    if (mi != wtx.mapValue.end() && !mi->second.empty())
                        sub.narration = mi->second;

                    parts.append(sub);
                };
            };
//.........这里部分代码省略.........