Impl (DigestAwareReadView const& ledger)
{
auto const k = keylet::amendments();
digest_ = ledger.digest(k.key);
if (! digest_)
return;
auto const sle = ledger.read(k);
if (! sle)
{
// LogicError() ?
return;
}
for (auto const& item :
sle->getFieldV256(sfAmendments))
set_.insert(item);
}
explicit Impl(
DigestAwareReadView const& ledger,
std::unordered_set<uint256, beast::uhash<>> const& presets)
: presets_(presets)
{
auto const k = keylet::amendments();
digest_ = ledger.digest(k.key);
if (! digest_)
return;
auto const sle = ledger.read(k);
if (! sle)
{
// LogicError() ?
return;
}
for (auto const& item :
sle->getFieldV256(sfAmendments))
set_.insert(item);
}
// Handle the case where a directory item with no corresponding ledger entry
// is found. This shouldn't happen but if it does we clean it up.
void
OfferStream::erase (LedgerView& view)
{
// NIKB NOTE This should be using LedgerView::dirDelete, which would
// correctly remove the directory if its the last entry.
// Unfortunately this is a protocol breaking change.
auto p (view.entryCache (ltDIR_NODE, m_tip.dir()));
if (p == nullptr)
{
if (m_journal.error) m_journal.error <<
"Missing directory " << m_tip.dir() <<
" for offer " << m_tip.index();
return;
}
auto v (p->getFieldV256 (sfIndexes));
auto& x (v.peekValue());
auto it (std::find (x.begin(), x.end(), m_tip.index()));
if (it == x.end())
{
if (m_journal.error) m_journal.error <<
"Missing offer " << m_tip.index() <<
" for directory " << m_tip.dir();
return;
}
x.erase (it);
p->setFieldV256 (sfIndexes, v);
view.entryModify (p);
if (m_journal.trace) m_journal.trace <<
"Missing offer " << m_tip.index() <<
" removed from directory " << m_tip.dir();
}
// Handle the case where a directory item with no corresponding ledger entry
// is found. This shouldn't happen but if it does we clean it up.
void
OfferStream::erase (ApplyView& view)
{
// NIKB NOTE This should be using ApplyView::dirDelete, which would
// correctly remove the directory if its the last entry.
// Unfortunately this is a protocol breaking change.
auto p = view.peek (keylet::page(tip_.dir()));
if (p == nullptr)
{
JLOG(j_.error) <<
"Missing directory " << tip_.dir() <<
" for offer " << tip_.index();
return;
}
auto v (p->getFieldV256 (sfIndexes));
auto it (std::find (v.begin(), v.end(), tip_.index()));
if (it == v.end())
{
JLOG(j_.error) <<
"Missing offer " << tip_.index() <<
" for directory " << tip_.dir();
return;
}
v.erase (it);
p->setFieldV256 (sfIndexes, v);
view.update (p);
JLOG(j_.trace) <<
"Missing offer " << tip_.index() <<
" removed from directory " << tip_.dir();
}
// update the skip list with the information from our previous ledger
// VFALCO TODO Document this skip list concept
void Ledger::updateSkipList ()
{
if (info_.seq == 0) // genesis ledger has no previous ledger
return;
std::uint32_t prevIndex = info_.seq - 1;
// update record of every 256th ledger
if ((prevIndex & 0xff) == 0)
{
auto const k = keylet::skip(prevIndex);
auto sle = peek(k);
std::vector<uint256> hashes;
bool created;
if (! sle)
{
sle = std::make_shared<SLE>(k);
created = true;
}
else
{
hashes = static_cast<decltype(hashes)>(
sle->getFieldV256(sfHashes));
created = false;
}
assert (hashes.size () <= 256);
hashes.push_back (info_.parentHash);
sle->setFieldV256 (sfHashes, STVector256 (hashes));
sle->setFieldU32 (sfLastLedgerSequence, prevIndex);
if (created)
rawInsert(sle);
else
rawReplace(sle);
}
// update record of past 256 ledger
auto const k = keylet::skip();
auto sle = peek(k);
std::vector <uint256> hashes;
bool created;
if (! sle)
{
sle = std::make_shared<SLE>(k);
created = true;
}
else
{
hashes = static_cast<decltype(hashes)>(
sle->getFieldV256 (sfHashes));
created = false;
}
assert (hashes.size () <= 256);
if (hashes.size () == 256)
hashes.erase (hashes.begin ());
hashes.push_back (info_.parentHash);
sle->setFieldV256 (sfHashes, STVector256 (hashes));
sle->setFieldU32 (sfLastLedgerSequence, prevIndex);
if (created)
rawInsert(sle);
else
rawReplace(sle);
}
