Add GetKeyBirthTimes to wallet

Compute safe lower bounds on the birth times of all wallet keys. For
pool keys or keys with metadata, the actually stored birth time is
used. For all others, the birth times are inferred from the wallet
transactions.
This commit is contained in:
Pieter Wuille 2013-04-29 19:50:40 +02:00
parent acc775c554
commit 434e4273b9
3 changed files with 63 additions and 2 deletions

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@ -1846,7 +1846,7 @@ void CReserveKey::ReturnKey()
vchPubKey = CPubKey(); vchPubKey = CPubKey();
} }
void CWallet::GetAllReserveKeys(set<CKeyID>& setAddress) void CWallet::GetAllReserveKeys(set<CKeyID>& setAddress) const
{ {
setAddress.clear(); setAddress.clear();
@ -1908,3 +1908,53 @@ void CWallet::ListLockedCoins(std::vector<COutPoint>& vOutpts)
} }
} }
void CWallet::GetKeyBirthTimes(std::map<CKeyID, int64> &mapKeyBirth) const {
mapKeyBirth.clear();
// get birth times for keys with metadata
for (std::map<CKeyID, CKeyMetadata>::const_iterator it = mapKeyMetadata.begin(); it != mapKeyMetadata.end(); it++)
if (it->second.nCreateTime)
mapKeyBirth[it->first] = it->second.nCreateTime;
// map in which we'll infer heights of other keys
CBlockIndex *pindexMax = FindBlockByHeight(std::max(0, nBestHeight - 144)); // the tip can be reorganised; use a 144-block safety margin
std::map<CKeyID, CBlockIndex*> mapKeyFirstBlock;
std::set<CKeyID> setKeys;
GetKeys(setKeys);
BOOST_FOREACH(const CKeyID &keyid, setKeys) {
if (mapKeyBirth.count(keyid) == 0)
mapKeyFirstBlock[keyid] = pindexMax;
}
setKeys.clear();
// if there are no such keys, we're done
if (mapKeyFirstBlock.empty())
return;
// find first block that affects those keys, if there are any left
std::vector<CKeyID> vAffected;
for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); it++) {
// iterate over all wallet transactions...
const CWalletTx &wtx = (*it).second;
std::map<uint256, CBlockIndex*>::const_iterator blit = mapBlockIndex.find(wtx.hashBlock);
if (blit != mapBlockIndex.end() && blit->second->IsInMainChain()) {
// ... which are already in a block
int nHeight = blit->second->nHeight;
BOOST_FOREACH(const CTxOut &txout, wtx.vout) {
// iterate over all their outputs
::ExtractAffectedKeys(*this, txout.scriptPubKey, vAffected);
BOOST_FOREACH(const CKeyID &keyid, vAffected) {
// ... and all their affected keys
std::map<CKeyID, CBlockIndex*>::iterator rit = mapKeyFirstBlock.find(keyid);
if (rit != mapKeyFirstBlock.end() && nHeight < rit->second->nHeight)
rit->second = blit->second;
}
vAffected.clear();
}
}
}
// Extract block timestamps for those keys
for (std::map<CKeyID, CBlockIndex*>::const_iterator it = mapKeyFirstBlock.begin(); it != mapKeyFirstBlock.end(); it++)
mapKeyBirth[it->first] = it->second->nTime - 7200; // block times can be 2h off
}

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@ -159,6 +159,8 @@ public:
bool ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase); bool ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase);
bool EncryptWallet(const SecureString& strWalletPassphrase); bool EncryptWallet(const SecureString& strWalletPassphrase);
void GetKeyBirthTimes(std::map<CKeyID, int64> &mapKeyBirth) const;
/** Increment the next transaction order id /** Increment the next transaction order id
@return next transaction order id @return next transaction order id
*/ */
@ -200,7 +202,7 @@ public:
void ReturnKey(int64 nIndex); void ReturnKey(int64 nIndex);
bool GetKeyFromPool(CPubKey &key, bool fAllowReuse=true); bool GetKeyFromPool(CPubKey &key, bool fAllowReuse=true);
int64 GetOldestKeyPoolTime(); int64 GetOldestKeyPoolTime();
void GetAllReserveKeys(std::set<CKeyID>& setAddress); void GetAllReserveKeys(std::set<CKeyID>& setAddress) const;
std::set< std::set<CTxDestination> > GetAddressGroupings(); std::set< std::set<CTxDestination> > GetAddressGroupings();
std::map<CTxDestination, int64> GetAddressBalances(); std::map<CTxDestination, int64> GetAddressBalances();

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@ -365,7 +365,16 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
{ {
int64 nIndex; int64 nIndex;
ssKey >> nIndex; ssKey >> nIndex;
CKeyPool keypool;
ssValue >> keypool;
pwallet->setKeyPool.insert(nIndex); pwallet->setKeyPool.insert(nIndex);
// If no metadata exists yet, create a default with the pool key's
// creation time. Note that this may be overwritten by actually
// stored metadata for that key later, which is fine.
CKeyID keyid = keypool.vchPubKey.GetID();
if (pwallet->mapKeyMetadata.count(keyid) == 0)
pwallet->mapKeyMetadata[keyid] = CKeyMetadata(keypool.nTime);
} }
else if (strType == "version") else if (strType == "version")
{ {