// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin Core developers
// Copyright (c) 2019-2020 The Hush developers
// Distributed under the GPLv3 software license, see the accompanying
// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html

/******************************************************************************
 * Copyright © 2014-2019 The SuperNET Developers.                             *
 *                                                                            *
 * See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at                  *
 * the top-level directory of this distribution for the individual copyright  *
 * holder information and the developer policies on copyright and licensing.  *
 *                                                                            *
 * Unless otherwise agreed in a custom licensing agreement, no part of the    *
 * SuperNET software, including this file may be copied, modified, propagated *
 * or distributed except according to the terms contained in the LICENSE file *
 *                                                                            *
 * Removal or modification of this copyright notice is prohibited.            *
 *                                                                            *
 ******************************************************************************/

#include "keystore.h"

#include "key.h"
#include "util.h"

#include <boost/foreach.hpp>

bool CKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const
{
    CKey key;
    if (!GetKey(address, key))
        return false;
    vchPubKeyOut = key.GetPubKey();
    return true;
}

bool CKeyStore::AddKey(const CKey &key) {
    return AddKeyPubKey(key, key.GetPubKey());
}

bool CBasicKeyStore::SetHDSeed(const HDSeed& seed)
{
    LOCK(cs_SpendingKeyStore);
    if (!hdSeed.IsNull()) {
        // Don't allow an existing seed to be changed. We can maybe relax this
        // restriction later once we have worked out the UX implications.
        return false;
    }
    hdSeed = seed;
    return true;
}

bool CBasicKeyStore::HaveHDSeed() const
{
    LOCK(cs_SpendingKeyStore);
    return !hdSeed.IsNull();
}

bool CBasicKeyStore::GetHDSeed(HDSeed& seedOut) const
{
    LOCK(cs_SpendingKeyStore);
    if (hdSeed.IsNull()) {
        return false;
    } else {
        seedOut = hdSeed;
        return true;
    }
}

bool CBasicKeyStore::AddKeyPubKey(const CKey& key, const CPubKey &pubkey)
{
    LOCK(cs_KeyStore);
    mapKeys[pubkey.GetID()] = key;
    return true;
}

bool CBasicKeyStore::AddCScript(const CScript& redeemScript)
{
    if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE)
        return error("CBasicKeyStore::AddCScript(): redeemScripts > %i bytes are invalid", MAX_SCRIPT_ELEMENT_SIZE);

    LOCK(cs_KeyStore);
    mapScripts[CScriptID(redeemScript)] = redeemScript;
    return true;
}

bool CBasicKeyStore::HaveCScript(const CScriptID& hash) const
{
    LOCK(cs_KeyStore);
    return mapScripts.count(hash) > 0;
}

bool CBasicKeyStore::GetCScript(const CScriptID &hash, CScript& redeemScriptOut) const
{
    LOCK(cs_KeyStore);
    ScriptMap::const_iterator mi = mapScripts.find(hash);
    if (mi != mapScripts.end())
    {
        redeemScriptOut = (*mi).second;
        return true;
    }
    return false;
}

bool CBasicKeyStore::AddWatchOnly(const CScript &dest)
{
    LOCK(cs_KeyStore);
    setWatchOnly.insert(dest);
    return true;
}

bool CBasicKeyStore::RemoveWatchOnly(const CScript &dest)
{
    LOCK(cs_KeyStore);
    setWatchOnly.erase(dest);
    return true;
}

bool CBasicKeyStore::HaveWatchOnly(const CScript &dest) const
{
    LOCK(cs_KeyStore);
    return setWatchOnly.count(dest) > 0;
}

bool CBasicKeyStore::HaveWatchOnly() const
{
    LOCK(cs_KeyStore);
    return (!setWatchOnly.empty());
}

//! Sapling 
bool CBasicKeyStore::AddSaplingSpendingKey(
    const libzcash::SaplingExtendedSpendingKey &sk,
    const libzcash::SaplingPaymentAddress &defaultAddr)
{
    LOCK(cs_SpendingKeyStore);
    auto fvk = sk.expsk.full_viewing_key();

    // if SaplingFullViewingKey is not in SaplingFullViewingKeyMap, add it
    if (!AddSaplingFullViewingKey(fvk, defaultAddr)) {
        return false;
    }

    mapSaplingSpendingKeys[fvk] = sk;

    return true;
}


bool CBasicKeyStore::AddSaplingFullViewingKey(
    const libzcash::SaplingFullViewingKey &fvk,
    const libzcash::SaplingPaymentAddress &defaultAddr)
{
    LOCK(cs_SpendingKeyStore);
    auto ivk = fvk.in_viewing_key();
    mapSaplingFullViewingKeys[ivk] = fvk;

    return CBasicKeyStore::AddSaplingIncomingViewingKey(ivk, defaultAddr);
}

// This function updates the wallet's internal address->ivk map. 
// If we add an address that is already in the map, the map will
// remain unchanged as each address only has one ivk.
bool CBasicKeyStore::AddSaplingIncomingViewingKey(
    const libzcash::SaplingIncomingViewingKey &ivk,
    const libzcash::SaplingPaymentAddress &addr)
{
    LOCK(cs_SpendingKeyStore);

    // Add addr -> SaplingIncomingViewing to SaplingIncomingViewingKeyMap
    mapSaplingIncomingViewingKeys[addr] = ivk;

    return true;
}



bool CBasicKeyStore::HaveSaplingFullViewingKey(const libzcash::SaplingIncomingViewingKey &ivk) const
{
    LOCK(cs_SpendingKeyStore);
    return mapSaplingFullViewingKeys.count(ivk) > 0;
}

bool CBasicKeyStore::HaveSaplingIncomingViewingKey(const libzcash::SaplingPaymentAddress &addr) const
{
    LOCK(cs_SpendingKeyStore);
    return mapSaplingIncomingViewingKeys.count(addr) > 0;
}

bool CBasicKeyStore::GetSaplingFullViewingKey(const libzcash::SaplingIncomingViewingKey &ivk,
                                   libzcash::SaplingFullViewingKey &fvkOut) const
{
    LOCK(cs_SpendingKeyStore);
    SaplingFullViewingKeyMap::const_iterator mi = mapSaplingFullViewingKeys.find(ivk);
    if (mi != mapSaplingFullViewingKeys.end()) {
        fvkOut = mi->second;
        return true;
    }
    return false;
}

bool CBasicKeyStore::GetSaplingIncomingViewingKey(const libzcash::SaplingPaymentAddress &addr,
                                   libzcash::SaplingIncomingViewingKey &ivkOut) const
{
    LOCK(cs_SpendingKeyStore);
    SaplingIncomingViewingKeyMap::const_iterator mi = mapSaplingIncomingViewingKeys.find(addr);
    if (mi != mapSaplingIncomingViewingKeys.end()) {
        ivkOut = mi->second;
        return true;
    }
    return false;
}

bool CBasicKeyStore::GetSaplingExtendedSpendingKey(const libzcash::SaplingPaymentAddress &addr, 
                                    libzcash::SaplingExtendedSpendingKey &extskOut) const {
    libzcash::SaplingIncomingViewingKey ivk;
    libzcash::SaplingFullViewingKey fvk;

    return GetSaplingIncomingViewingKey(addr, ivk) &&
            GetSaplingFullViewingKey(ivk, fvk) &&
            GetSaplingSpendingKey(fvk, extskOut);
}