void WalletModel::pollBalanceChanged()
{
    // Get required locks upfront. This avoids the GUI from getting stuck on
    // periodical polls if the core is holding the locks for a longer time -
    // for example, during a wallet rescan.
    TRY_LOCK(cs_main, lockMain);
    if(!lockMain)
        return;
    TRY_LOCK(wallet->cs_wallet, lockWallet);
    if(!lockWallet)
        return;

    if(fForceCheckBalanceChanged || chainActive.Height() != cachedNumBlocks || privateSendClient.nPrivateSendRounds != cachedPrivateSendRounds || cachedTxLocks != nCompleteTXLocks)
    {
        fForceCheckBalanceChanged = false;

        // Balance and number of transactions might have changed
        cachedNumBlocks = chainActive.Height();
        cachedPrivateSendRounds = privateSendClient.nPrivateSendRounds;

        checkBalanceChanged();
        if(transactionTableModel)
            transactionTableModel->updateConfirmations();
    }
}

void WalletModel::pollBalanceChanged()
{
    // Try to get balances and return early if locks can't be acquired. This
    // avoids the GUI from getting stuck on periodical polls if the core is
    // holding the locks for a longer time - for example, during a wallet
    // rescan.
    interfaces::WalletBalances new_balances;
    interfaces::CoinJoinStatus new_status;
    int numBlocks = -1;
    if (!m_wallet->tryGetBalances(new_balances, new_status, numBlocks)) {
        return;
    }

    if(fForceCheckBalanceChanged || m_node.getNumBlocks() != cachedNumBlocks)
    {
        fForceCheckBalanceChanged = false;

        // Balance and number of transactions might have changed
        cachedNumBlocks = m_node.getNumBlocks();

        checkBalanceChanged(new_balances);
        checkCoinJoinChanged(new_status);
        if(transactionTableModel)
            transactionTableModel->updateConfirmations();
    }
}

void WalletModel::pollBalanceChanged()
{
    if(nBestHeight != cachedNumBlocks)
    {
        // Balance and number of transactions might have changed
        cachedNumBlocks = nBestHeight;
        checkBalanceChanged();

        if (!IsInitialBlockDownload())
        {
            if (!fSyncedAtLeastOnce)
            {
                // On client start it fails to broadcast (too few connections?), so we wait for full synchronization
                QDateTime lastBlockDate = QDateTime::fromTime_t(pindexBest->GetBlockTime());
                QDateTime currentDate = QDateTime::currentDateTime();
                int secs = lastBlockDate.secsTo(currentDate);
                if (secs < 90*60 && nBestHeight >= GetNumBlocksOfPeers())
                    fSyncedAtLeastOnce = true;
            }

            if (fSyncedAtLeastOnce)
                sendPendingNameFirstUpdates();
        }
    }
}

void WalletModel::updateTransaction(const QString &hash, int status)
{
    if(transactionTableModel)
        transactionTableModel->updateTransaction(hash, status);

    // Balance and number of transactions might have changed
    checkBalanceChanged();
}

void WalletModel::pollBalanceChanged()
{
    if(nBestHeight != cachedNumBlocks)
    {
        // Balance and number of transactions might have changed
        cachedNumBlocks = nBestHeight;
        checkBalanceChanged();
    }
}

void WalletModel::pollBalanceChanged()
{
    if(nBestHeight != cachedNumBlocks) {
        cachedNumBlocks = nBestHeight;
        checkBalanceChanged();
    }

    if(cachedUnconfirmedBalance || cachedImmatureBalance)
        pollTimer->start();
}

void WalletModel::updateTransaction()
{
    // Balance and number of transactions might have changed
    checkBalanceChanged();

    int newNumTransactions = getNumTransactions();
    if(cachedNumTransactions != newNumTransactions)
    {
        cachedNumTransactions = newNumTransactions;
        emit numTransactionsChanged(newNumTransactions);
    }
}

void WalletModel::pollBalanceChanged()
{
    if(nBestHeight != cachedNumBlocks)
    {
        // Balance and number of transactions might have changed
        cachedNumBlocks = nBestHeight;
        checkBalanceChanged();
    }
	if (bForceUpdate)
	{
		emit balanceChanged(cachedBalance, cachedUnconfirmedBalance, cachedImmatureBalance);
		bForceUpdate=false;

	}
}

void WalletModel::pollBalanceChanged()
{
    bool heightChanged = false;
    {
        LOCK(cs_main);
        if(chainActive.Height() != cachedNumBlocks)
        {
            // Balance and number of transactions might have changed
            cachedNumBlocks = chainActive.Height();
            heightChanged = true;
        }
    }
    if(heightChanged)
    {
        checkBalanceChanged();
        if(transactionTableModel)
            transactionTableModel->updateConfirmations();
    }
}

void WalletModel::pollBalanceChanged()
{
    // Get required locks upfront. This avoids the GUI from getting stuck on
    // periodical polls if the core is holding the locks for a longer time -
    // for example, during a wallet rescan.
    TRY_LOCK(cs_main, lockMain);
    if(!lockMain)
        return;
    TRY_LOCK(wallet->cs_wallet, lockWallet);
    if(!lockWallet)
        return;

    if(nBestHeight != cachedNumBlocks)
    {
        // Balance and number of transactions might have changed
        cachedNumBlocks = nBestHeight;
        checkBalanceChanged();
        if(transactionTableModel)
            transactionTableModel->updateConfirmations();
    }
}

WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &transaction)
{
    QByteArray transaction_array; /* store serialized transaction */

    {
        std::vector<std::pair<std::string, std::string>> vOrderForm;
        for (const SendCoinsRecipient &rcp : transaction.getRecipients())
        {
#ifdef ENABLE_BIP70
            if (rcp.paymentRequest.IsInitialized())
            {
                // Make sure any payment requests involved are still valid.
                if (PaymentServer::verifyExpired(rcp.paymentRequest.getDetails())) {
                    return PaymentRequestExpired;
                }

                // Store PaymentRequests in wtx.vOrderForm in wallet.
                std::string value;
                rcp.paymentRequest.SerializeToString(&value);
                vOrderForm.emplace_back("PaymentRequest", std::move(value));
            }
            else
#endif
            if (!rcp.message.isEmpty()) // Message from normal bitcoin:URI (bitcoin:123...?message=example)
                vOrderForm.emplace_back("Message", rcp.message.toStdString());
        }

        auto& newTx = transaction.getWtx();
        bool fCoinJoin = true;
        // CoinJoin is executed per-tx
        for (const SendCoinsRecipient &rcp : transaction.getRecipients())
        {
            if (!rcp.fCoinJoin)
            {
                fCoinJoin = false;
                continue;
            }
        }
        std::string rejectReason;
        if (!newTx->commit({} /* mapValue */, std::move(vOrderForm), rejectReason, fCoinJoin))
            return SendCoinsReturn(TransactionCommitFailed, QString::fromStdString(rejectReason));

        CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
        ssTx << newTx->get();
        transaction_array.append(&(ssTx[0]), ssTx.size());
    }

    // Add addresses / update labels that we've sent to the address book,
    // and emit coinsSent signal for each recipient
    for (const SendCoinsRecipient &rcp : transaction.getRecipients())
    {
        // Don't touch the address book when we have a payment request
#ifdef ENABLE_BIP70
        if (!rcp.paymentRequest.IsInitialized())
#endif
        {
            std::string strAddress = rcp.address.toStdString();
            CTxDestination dest = DecodeDestination(strAddress);
            std::string strLabel = rcp.label.toStdString();
            {
                // Check if we have a new address or an updated label
                std::string name;
                if (!m_wallet->getAddress(
                     dest, &name, /* is_mine= */ nullptr, /* purpose= */ nullptr))
                {
                    m_wallet->setAddressBook(dest, strLabel, "send");
                }
                else if (name != strLabel)
                {
                    m_wallet->setAddressBook(dest, strLabel, ""); // "" means don't change purpose
                }
            }
        }
        Q_EMIT coinsSent(this, rcp, transaction_array);
    }

    checkBalanceChanged(m_wallet->getBalances()); // update balance immediately, otherwise there could be a short noticeable delay until pollBalanceChanged hits
    checkCoinJoinChanged(m_wallet->getCoinJoinStatus()); // update status immediately, otherwise there could be a short noticeable delay until pollBalanceChanged hits

    return SendCoinsReturn(OK);
}

WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &transaction)
{
    QByteArray transaction_array; /* store serialized transaction */

    {
        LOCK2(cs_main, wallet->cs_wallet);
        CWalletTx *newTx = transaction.getTransaction();

        Q_FOREACH(const SendCoinsRecipient &rcp, transaction.getRecipients())
        {
            if (rcp.paymentRequest.IsInitialized())
            {
                // Make sure any payment requests involved are still valid.
                if (PaymentServer::verifyExpired(rcp.paymentRequest.getDetails())) {
                    return PaymentRequestExpired;
                }

                // Store PaymentRequests in wtx.vOrderForm in wallet.
                std::string key("PaymentRequest");
                std::string value;
                rcp.paymentRequest.SerializeToString(&value);
                newTx->vOrderForm.push_back(make_pair(key, value));
            }
            else if (!rcp.message.isEmpty()) // Message from normal bitcoin:URI (bitcoin:123...?message=example)
                newTx->vOrderForm.push_back(make_pair("Message", rcp.message.toStdString()));
        }

        CReserveKey *keyChange = transaction.getPossibleKeyChange();
        if(!wallet->CommitTransaction(*newTx, *keyChange))
            return TransactionCommitFailed;

        CTransaction* t = (CTransaction*)newTx;
        CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
        ssTx << *t;
        transaction_array.append(&(ssTx[0]), ssTx.size());
    }

    // Add addresses / update labels that we've sent to to the address book,
    // and emit coinsSent signal for each recipient
    Q_FOREACH(const SendCoinsRecipient &rcp, transaction.getRecipients())
    {
        // Don't touch the address book when we have a payment request
        if (!rcp.paymentRequest.IsInitialized())
        {
            std::string strAddress = rcp.address.toStdString();
            CTxDestination dest = CBitcoinAddress(strAddress).Get();
            std::string strLabel = rcp.label.toStdString();
            {
                LOCK(wallet->cs_wallet);

                std::map<CTxDestination, CAddressBookData>::iterator mi = wallet->mapAddressBook.find(dest);

                // Check if we have a new address or an updated label
                if (mi == wallet->mapAddressBook.end())
                {
                    wallet->SetAddressBook(dest, strLabel, "send");
                }
                else if (mi->second.name != strLabel)
                {
                    wallet->SetAddressBook(dest, strLabel, ""); // "" means don't change purpose
                }
            }
        }
        Q_EMIT coinsSent(wallet, rcp, transaction_array);
    }
    checkBalanceChanged(); // update balance immediately, otherwise there could be a short noticeable delay until pollBalanceChanged hits

    return SendCoinsReturn(OK);
}