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Cleanups. Function to fully remove/undo a transaction from a ledger.

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This commit is contained in:
JoelKatz
2011-11-25 21:50:58 -08:00
parent c6f50c8d59
commit d4030472e7
1 changed files with 45 additions and 5 deletions
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50
Ledger.cpp
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@@ -44,7 +44,7 @@ AccountState::pointer Ledger::getAccountState(const uint160& accountID)
{
ScopedLock l(mTransactionMap->Lock());
SHAMapItem::pointer item=mTransactionMap->peekItem(uint160to256(accountID));
if(item==NULL) return AccountState::pointer();
if(!item) return AccountState::pointer();
return AccountState::pointer(new AccountState(item->getData()));
}
@@ -60,11 +60,16 @@ bool Ledger::addTransaction(Transaction::pointer trans)
return mTransactionMap->addGiveItem(item);
}
bool Ledger::delTransaction(const uint256& transID)
{
return mTransactionMap->delItem(transID);
}
Transaction::pointer Ledger::getTransaction(const uint256& transID)
{
ScopedLock l(mTransactionMap->Lock());
SHAMapItem::pointer item=mTransactionMap->peekItem(transID);
if(item==NULL) return Transaction::pointer();
if(!item) return Transaction::pointer();
Transaction *t=new Transaction(item->getData(), true);
if(t->getStatus()==NEW) t->setStatus(mCurrent ? INCLUDED : COMMITTED, mLedgerSeq);
return Transaction::pointer(t);
@@ -75,17 +80,17 @@ Ledger::TransResult Ledger::applyTransaction(Transaction::pointer trans)
ScopedLock l(mLock);
if(trans->getSourceLedger()<mLedgerSeq) return TR_BADLSEQ;
if(trans->getAmount()<trans->getFee()) return TR_TOOSMALL;
if((mTransactionMap==NULL) || (mAccountStateMap==NULL)) return TR_ERROR;
if(!mTransactionMap || !mAccountStateMap) return TR_ERROR;
try
{
// already applied?
Transaction::pointer dupTrans=getTransaction(trans->getID());
if(dupTrans!=NULL) return TR_ALREADY;
if(dupTrans) return TR_ALREADY;
// accounts exist?
AccountState::pointer fromAccount=getAccountState(trans->getFromAccount());
AccountState::pointer toAccount=getAccountState(trans->getToAccount());
if((fromAccount==NULL)||(toAccount==NULL)) return TR_BADACCT;
if(!fromAccount || !toAccount) return TR_BADACCT;
// pass sanity checks?
if(fromAccount->getBalance()<trans->getAmount()) return TR_INSUFF;
@@ -113,6 +118,41 @@ Ledger::TransResult Ledger::applyTransaction(Transaction::pointer trans)
Ledger::TransResult Ledger::removeTransaction(Transaction::pointer trans)
{ // high-level - reverse application of transaction
ScopedLock l(mLock);
if(!mTransactionMap || !mAccountStateMap) return TR_ERROR;
try
{
Transaction::pointer ourTrans=getTransaction(trans->getID());
if(!ourTrans) return TR_NOTFOUND;
// accounts exist
AccountState::pointer fromAccount=getAccountState(trans->getFromAccount());
AccountState::pointer toAccount=getAccountState(trans->getToAccount());
if(!fromAccount || !toAccount) return TR_BADACCT;
// pass sanity checks?
if(toAccount->getBalance()<trans->getAmount()) return TR_INSUFF;
if(fromAccount->getSeq()!=(trans->getFromAccountSeq()+1)) return TR_PASTASEQ;
// reverse
fromAccount->credit(trans->getAmount());
fromAccount->decSeq();
toAccount->charge(trans->getAmount()-trans->getFee());
mFeeHeld-=trans->getFee();
trans->setStatus(REMOVED, mLedgerSeq);
if(!delTransaction(trans->getID()))
{
assert(false);
return TR_ERROR;
}
updateAccountState(fromAccount);
updateAccountState(toAccount);
}
catch (SHAMapException)
{
return TR_ERROR;
}
}
Ledger::TransResult Ledger::hasTransaction(Transaction::pointer trans)