BasketContract.cpp

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/************************************************************
 *
 *  BasketContract.cpp
 *
 */

/************************************************************
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 *                 OPEN TRANSACTIONS
 *
 *       Financial Cryptography and Digital Cash
 *       Library, Protocol, API, Server, CLI, GUI
 *
 *       -- Anonymous Numbered Accounts.
 *       -- Untraceable Digital Cash.
 *       -- Triple-Signed Receipts.
 *       -- Cheques, Vouchers, Transfers, Inboxes.
 *       -- Basket Currencies, Markets, Payment Plans.
 *       -- Signed, XML, Ricardian-style Contracts.
 *       -- Scripted smart contracts.
 *
 *  Copyright (C) 2010-2013 by "Fellow Traveler" (A pseudonym)
 *
 *  EMAIL:
 *  [email protected]
 *
 *  BITCOIN:  1NtTPVVjDsUfDWybS4BwvHpG2pdS9RnYyQ
 *
 *  KEY FINGERPRINT (PGP Key in license file):
 *  9DD5 90EB 9292 4B48 0484  7910 0308 00ED F951 BB8E
 *
 *  OFFICIAL PROJECT WIKI(s):
 *  https://github.com/FellowTraveler/Moneychanger
 *  https://github.com/FellowTraveler/Open-Transactions/wiki
 *
 *  WEBSITE:
 *  http://www.OpenTransactions.org/
 *
 *  Components and licensing:
 *   -- Moneychanger..A Java client GUI.....LICENSE:.....GPLv3
 *   -- otlib.........A class library.......LICENSE:...LAGPLv3
 *   -- otapi.........A client API..........LICENSE:...LAGPLv3
 *   -- opentxs/ot....Command-line client...LICENSE:...LAGPLv3
 *   -- otserver......Server Application....LICENSE:....AGPLv3
 *  Github.com/FellowTraveler/Open-Transactions/wiki/Components
 *
 *  All of the above OT components were designed and written by
 *  Fellow Traveler, with the exception of Moneychanger, which
 *  was contracted out to Vicky C ([email protected]).
 *  The open-source community has since actively contributed.
 *
 *  -----------------------------------------------------
 *
 *   LICENSE:
 *   This program is free software: you can redistribute it
 *   and/or modify it under the terms of the GNU Affero
 *   General Public License as published by the Free Software
 *   Foundation, either version 3 of the License, or (at your
 *   option) any later version.
 *
 *   ADDITIONAL PERMISSION under the GNU Affero GPL version 3
 *   section 7: (This paragraph applies only to the LAGPLv3
 *   components listed above.) If you modify this Program, or
 *   any covered work, by linking or combining it with other
 *   code, such other code is not for that reason alone subject
 *   to any of the requirements of the GNU Affero GPL version 3.
 *   (==> This means if you are only using the OT API, then you
 *   don't have to open-source your code--only your changes to
 *   Open-Transactions itself must be open source. Similar to
 *   LGPLv3, except it applies to software-as-a-service, not
 *   just to distributing binaries.)
 *
 *   Extra WAIVER for OpenSSL, Lucre, and all other libraries
 *   used by Open Transactions: This program is released under
 *   the AGPL with the additional exemption that compiling,
 *   linking, and/or using OpenSSL is allowed. The same is true
 *   for any other open source libraries included in this
 *   project: complete waiver from the AGPL is hereby granted to
 *   compile, link, and/or use them with Open-Transactions,
 *   according to their own terms, as long as the rest of the
 *   Open-Transactions terms remain respected, with regard to
 *   the Open-Transactions code itself.
 *
 *   Lucre License:
 *   This code is also "dual-license", meaning that Ben Lau-
 *   rie's license must also be included and respected, since
 *   the code for Lucre is also included with Open Transactions.
 *   See Open-Transactions/src/otlib/lucre/LUCRE_LICENSE.txt
 *   The Laurie requirements are light, but if there is any
 *   problem with his license, simply remove the Lucre code.
 *   Although there are no other blind token algorithms in Open
 *   Transactions (yet. credlib is coming), the other functions
 *   will continue to operate.
 *   See Lucre on Github:  https://github.com/benlaurie/lucre
 *   -----------------------------------------------------
 *   You should have received a copy of the GNU Affero General
 *   Public License along with this program.  If not, see:
 *   http://www.gnu.org/licenses/
 *
 *   If you would like to use this software outside of the free
 *   software license, please contact FellowTraveler.
 *   (Unfortunately many will run anonymously and untraceably,
 *   so who could really stop them?)
 *
 *   DISCLAIMER:
 *   This program is distributed in the hope that it will be
 *   useful, but WITHOUT ANY WARRANTY; without even the implied
 *   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *   PURPOSE.  See the GNU Affero General Public License for
 *   more details.

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#include "BasketContract.hpp"
#include "Basket.hpp"
#include "opentxs/core/crypto/OTASCIIArmor.hpp"
#include "opentxs/core/OTContract.hpp"
#include "opentxs/core/OTPseudonym.hpp"
#include "opentxs/core/OTString.hpp"
#include "opentxs/core/OTLog.hpp"

#include <irrxml/irrXML.hpp>

namespace opentxs
{

// Normally, Asset Contracts do NOT update / rewrite their contents, since their
// primary goal is for the signature to continue to verify.  But when first
// creating a basket contract, we have to rewrite the contents, which is done
// here.
BasketContract::BasketContract(Basket& theBasket, OTPseudonym& theSigner)
    : OTAssetContract()
{
    // Grab a string copy of the basket information.
    theBasket.SaveContractRaw(m_strBasketInfo);

    OTString strTemplate;
    OTASCIIArmor theBasketArmor(m_strBasketInfo);

    m_xmlUnsigned.Concatenate("<?xml version=\"%s\"?>\n", "1.0");

    strTemplate.Concatenate("<basketContract version=\"%s\">\n\n",
                            m_strVersion.Get());
    strTemplate.Concatenate("<basketInfo>\n%s</basketInfo>\n\n",
                            theBasketArmor.Get());

    strTemplate.Concatenate("</%s>\n", "basketContract");

    CreateContract(strTemplate, theSigner);
}

BasketContract::~BasketContract()
{
}

void BasketContract::CreateContents()
{
    m_strVersion = "2.0"; // 2.0 since adding credentials.

    m_xmlUnsigned.Release();
    m_xmlUnsigned.Concatenate("<?xml version=\"%s\"?>\n", "1.0");

    OTASCIIArmor theBasketArmor(m_strBasketInfo);

    m_xmlUnsigned.Concatenate("<basketContract version=\"%s\">\n\n",
                              m_strVersion.Get());
    m_xmlUnsigned.Concatenate("<basketInfo>\n%s</basketInfo>\n\n",
                              theBasketArmor.Get());

    // This is where OTContract scribes m_xmlUnsigned with its keys, conditions,
    // etc.
    CreateInnerContents();

    m_xmlUnsigned.Concatenate("</%s>\n", "basketContract");
}

// return -1 if error, 0 if nothing, and 1 if the node was processed.
int32_t BasketContract::ProcessXMLNode(irr::io::IrrXMLReader*& xml)
{
    int32_t nReturnVal = OTContract::ProcessXMLNode(xml);

    // Here we call the parent class first.
    // If the node is found there, or there is some error,
    // then we just return either way.  But if it comes back
    // as '0', then nothing happened, and we'll continue executing.
    //
    // -- Note you can choose not to call the parent if
    // you don't want to use any of those xml tags.

    if (nReturnVal == 1 || nReturnVal == (-1)) return nReturnVal;

    OTString strNodeName(xml->getNodeName());

    if (strNodeName.Compare("basketContract")) {
        m_strVersion = xml->getAttributeValue("version");

        otWarn << "\n"
                  "===> Loading XML portion of basket contract into memory "
                  "structures...\n\n"
                  "Digital Basket Contract: " << m_strName
               << "\nContract version: " << m_strVersion << "\n----------\n";
        nReturnVal = 1;
    }
    else if (strNodeName.Compare("basketInfo")) {
        if (!OTContract::LoadEncodedTextField(xml, m_strBasketInfo)) {
            otErr << "Error in OTAssetContract::ProcessXMLNode: basketInfo "
                     "field without value.\n";
            return (-1); // error condition
        }
        nReturnVal = 1;
    }

    return nReturnVal;
}

} // namespace opentxs