TxMeta::TxMeta (uint256 const& txid, std::uint32_t ledger, STObject const& obj,
beast::Journal j)
: mTransactionID (txid)
, mLedger (ledger)
, mNodes (obj.getFieldArray (sfAffectedNodes))
, j_ (j)
{
mResult = obj.getFieldU8 (sfTransactionResult);
mIndex = obj.getFieldU32 (sfTransactionIndex);
auto affectedNodes = dynamic_cast <STArray const*>
(obj.peekAtPField (sfAffectedNodes));
assert (affectedNodes);
if (affectedNodes)
mNodes = *affectedNodes;
if (obj.isFieldPresent (sfDeliveredAmount))
setDeliveredAmount (obj.getFieldAmount (sfDeliveredAmount));
}
std::pair<std::vector<SignerEntries::SignerEntry>, TER>
SignerEntries::deserialize (
STObject const& obj, beast::Journal journal, std::string const& annotation)
{
std::pair<std::vector<SignerEntry>, TER> s;
if (!obj.isFieldPresent (sfSignerEntries))
{
if (journal.trace) journal.trace <<
"Malformed " << annotation << ": Need signer entry array.";
s.second = temMALFORMED;
return s;
}
auto& accountVec = s.first;
accountVec.reserve (STTx::maxMultiSigners);
STArray const& sEntries (obj.getFieldArray (sfSignerEntries));
for (STObject const& sEntry : sEntries)
{
// Validate the SignerEntry.
if (sEntry.getFName () != sfSignerEntry)
{
journal.trace <<
"Malformed " << annotation << ": Expected SignerEntry.";
s.second = temMALFORMED;
return s;
}
// Extract SignerEntry fields.
AccountID const account = sEntry.getAccountID (sfAccount);
std::uint16_t const weight = sEntry.getFieldU16 (sfSignerWeight);
accountVec.emplace_back (account, weight);
}
s.second = tesSUCCESS;
return s;
}
static
bool
isMemoOkay (STObject const& st, std::string& reason)
{
if (!st.isFieldPresent (sfMemos))
return true;
auto const& memos = st.getFieldArray (sfMemos);
// The number 2048 is a preallocation hint, not a hard limit
// to avoid allocate/copy/free's
Serializer s (2048);
memos.add (s);
// FIXME move the memo limit into a config tunable
if (s.getDataLength () > 1024)
{
reason = "The memo exceeds the maximum allowed size.";
return false;
}
for (auto const& memo : memos)
{
auto memoObj = dynamic_cast <STObject const*> (&memo);
if (!memoObj || (memoObj->getFName() != sfMemo))
{
reason = "A memo array may contain only Memo objects.";
return false;
}
for (auto const& memoElement : *memoObj)
{
auto const& name = memoElement.getFName();
if (name != sfMemoType &&
name != sfMemoData &&
name != sfMemoFormat)
{
reason = "A memo may contain only MemoType, MemoData or "
"MemoFormat fields.";
return false;
}
// The raw data is stored as hex-octets, which we want to decode.
auto data = strUnHex (memoElement.getText ());
if (!data.second)
{
reason = "The MemoType, MemoData and MemoFormat fields may "
"only contain hex-encoded data.";
return false;
}
if (name == sfMemoData)
continue;
// The only allowed characters for MemoType and MemoFormat are the
// characters allowed in URLs per RFC 3986: alphanumerics and the
// following symbols: -._~:/?#[]@!$&'()*+,;=%
static std::array<char, 256> const allowedSymbols = []
{
std::array<char, 256> a;
a.fill(0);
std::string symbols (
"0123456789"
"-._~:/?#[]@!$&'()*+,;=%"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz");
for(char c : symbols)
a[c] = 1;
return a;
}();
for (auto c : data.first)
{
if (!allowedSymbols[c])
{
reason = "The MemoType and MemoFormat fields may only "
"contain characters that are allowed in URLs "
"under RFC 3986.";
return false;
}
}
}
}
return true;
}
void testSerialization ()
{
testcase ("serialization");
unexpected (sfGeneric.isUseful (), "sfGeneric must not be useful");
SField const& sfTestVL = SField::getField (STI_VL, 255);
SField const& sfTestH256 = SField::getField (STI_HASH256, 255);
SField const& sfTestU32 = SField::getField (STI_UINT32, 255);
SField const& sfTestObject = SField::getField (STI_OBJECT, 255);
SOTemplate elements;
elements.push_back (SOElement (sfFlags, SOE_REQUIRED));
elements.push_back (SOElement (sfTestVL, SOE_REQUIRED));
elements.push_back (SOElement (sfTestH256, SOE_OPTIONAL));
elements.push_back (SOElement (sfTestU32, SOE_REQUIRED));
STObject object1 (elements, sfTestObject);
STObject object2 (object1);
unexpected (object1.getSerializer () != object2.getSerializer (),
"STObject error 1");
unexpected (object1.isFieldPresent (sfTestH256) ||
!object1.isFieldPresent (sfTestVL), "STObject error");
object1.makeFieldPresent (sfTestH256);
unexpected (!object1.isFieldPresent (sfTestH256), "STObject Error 2");
unexpected (object1.getFieldH256 (sfTestH256) != uint256 (),
"STObject error 3");
if (object1.getSerializer () == object2.getSerializer ())
{
WriteLog (lsINFO, STObject) << "O1: " << object1.getJson (0);
WriteLog (lsINFO, STObject) << "O2: " << object2.getJson (0);
fail ("STObject error 4");
}
else
{
pass ();
}
object1.makeFieldAbsent (sfTestH256);
unexpected (object1.isFieldPresent (sfTestH256), "STObject error 5");
unexpected (object1.getFlags () != 0, "STObject error 6");
unexpected (object1.getSerializer () != object2.getSerializer (),
"STObject error 7");
STObject copy (object1);
unexpected (object1.isFieldPresent (sfTestH256), "STObject error 8");
unexpected (copy.isFieldPresent (sfTestH256), "STObject error 9");
unexpected (object1.getSerializer () != copy.getSerializer (),
"STObject error 10");
copy.setFieldU32 (sfTestU32, 1);
unexpected (object1.getSerializer () == copy.getSerializer (),
"STObject error 11");
for (int i = 0; i < 1000; i++)
{
Blob j (i, 2);
object1.setFieldVL (sfTestVL, j);
Serializer s;
object1.add (s);
SerialIter it (s.slice());
STObject object3 (elements, it, sfTestObject);
unexpected (object1.getFieldVL (sfTestVL) != j, "STObject error");
unexpected (object3.getFieldVL (sfTestVL) != j, "STObject error");
}
}