Value sendtoaddress(const Array& params, const CRPCContext& ctx, bool fHelp)
{    if (fHelp || params.size() < 2 || params.size() > 4)
        throw runtime_error(
            "sendtoaddress [:mixed] [comment] [comment-to]\n"
            " is a real and is rounded to the nearest 0.00000001\n"
            "coins can be mixed by appending :mixed to the destination address, which will conceal the address you sent them from."
            + HelpRequiringPassphrase(ctx));

    string strAddress = params[0].get_str();
    size_t iSeperator = strAddress.find_last_of(":");
  bool bMixCoins = false;
    if (iSeperator != std::string::npos)
    {
        string action = strAddress.substr(iSeperator+1);
        strAddress = strAddress.substr(0, iSeperator);
        bMixCoins = boost::iequals(action, "mixed");
    }

    CBitcoinAddress address(strAddress);
    if (!address.IsValid())
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid FedoraCoin address");

    // Amount
    uint64 nAmount = AmountFromValue(params[1]);

    // Wallet comments
    CWalletTx wtx;
    if (params.size() > 2 && params[2].type() != null_type && !params[2].get_str().empty())
        wtx.mapValue["comment"] = params[2].get_str();
    if (params.size() > 3 && params[3].type() != null_type && !params[3].get_str().empty())
        wtx.mapValue["to"]      = params[3].get_str();

    if (ctx.wallet->IsLocked())
        throw JSONRPCError(RPC_WALLET_UNLOCK_NEEDED, "Error: Please enter the wallet passphrase with walletpassphrase first.");

    string strError = ctx.wallet->SendMoneyToDestination(address.Get(), nAmount, wtx, bMixCoins);
    if (strError != "")
        throw JSONRPCError(RPC_WALLET_ERROR, strError);

    return wtx.GetHash().GetHex();
}