keystore.cpp

// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#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::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);

    /* We assume that dest could be a script with OP_CHECKBLOCKATHEIGHT. In this case we cant search
     * for full match with watchonly scripts, cause OP_CHECKBLOCKATHEIGHT arguments are different all the time.
     * So, instead, check that dest starts with some of the scripts from setWatchOnly */
    auto predicate = [&dest](const CScript& script) {
        auto res = search(begin(dest), end(dest), begin(script), end(script));
        return res == begin(dest);
    };

    return std::find_if(setWatchOnly.begin(), setWatchOnly.end(), predicate) != setWatchOnly.end();
}

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

bool CBasicKeyStore::AddSpendingKey(const libzcash::SpendingKey &sk)
{
    LOCK(cs_SpendingKeyStore);
    auto address = sk.address();
    mapSpendingKeys[address] = sk;
    mapNoteDecryptors.insert(std::make_pair(address, ZCNoteDecryption(sk.receiving_key())));
    return true;
}

bool CBasicKeyStore::AddViewingKey(const libzcash::ViewingKey &vk)
{
    LOCK(cs_SpendingKeyStore);
    auto address = vk.address();
    mapViewingKeys[address] = vk;
    mapNoteDecryptors.insert(std::make_pair(address, ZCNoteDecryption(vk.sk_enc)));
    return true;
}

bool CBasicKeyStore::RemoveViewingKey(const libzcash::ViewingKey &vk)
{
    LOCK(cs_SpendingKeyStore);
    mapViewingKeys.erase(vk.address());
    return true;
}

bool CBasicKeyStore::HaveViewingKey(const libzcash::PaymentAddress &address) const
{
    LOCK(cs_SpendingKeyStore);
    return mapViewingKeys.count(address) > 0;
}

bool CBasicKeyStore::GetViewingKey(const libzcash::PaymentAddress &address,
                                   libzcash::ViewingKey &vkOut) const
{
    LOCK(cs_SpendingKeyStore);
    ViewingKeyMap::const_iterator mi = mapViewingKeys.find(address);
    if (mi != mapViewingKeys.end()) {
        vkOut = mi->second;
        return true;
    }
    return false;
}