TER
SetAccount::preclaim(PreclaimContext const& ctx)
{
auto const id = ctx.tx[sfAccount];
std::uint32_t const uTxFlags = ctx.tx.getFlags();
auto const sle = ctx.view.read(
keylet::account(id));
std::uint32_t const uFlagsIn = sle->getFieldU32(sfFlags);
std::uint32_t const uSetFlag = ctx.tx.getFieldU32(sfSetFlag);
// legacy AccountSet flags
bool bSetRequireAuth = (uTxFlags & tfRequireAuth) || (uSetFlag == asfRequireAuth);
//
// RequireAuth
//
if (bSetRequireAuth && !(uFlagsIn & lsfRequireAuth))
{
if (!dirIsEmpty(ctx.view,
keylet::ownerDir(id)))
{
JLOG(ctx.j.trace) << "Retry: Owner directory not empty.";
return (ctx.flags & tapRETRY) ? terOWNERS : tecOWNERS;
}
}
return tesSUCCESS;
}
TER
CancelOffer::doApply ()
{
std::uint32_t const uOfferSequence = tx().getFieldU32 (sfOfferSequence);
auto const sle = view().read(
keylet::account(account_));
if (sle->getFieldU32 (sfSequence) - 1 <= uOfferSequence)
{
j_.trace << "Malformed transaction: " <<
"Sequence " << uOfferSequence << " is invalid.";
return temBAD_SEQUENCE;
}
uint256 const offerIndex (getOfferIndex (account_, uOfferSequence));
auto sleOffer = view().peek (
keylet::offer(offerIndex));
if (sleOffer)
{
j_.debug << "Trying to cancel offer #" << uOfferSequence;
return offerDelete (view(), sleOffer, ctx_.app.journal ("View"));
}
j_.debug << "Offer #" << uOfferSequence << " can't be found.";
return tesSUCCESS;
}
static
Rate
rippleQuality (
ReadView const& view,
AccountID const& destination,
AccountID const& source,
Currency const& currency,
SField const& sfLow,
SField const& sfHigh)
{
if (destination == source)
return parityRate;
auto const& sfField = destination < source ? sfLow : sfHigh;
auto const sle = view.read(
keylet::line(destination, source, currency));
if (!sle || !sle->isFieldPresent (sfField))
return parityRate;
auto quality = sle->getFieldU32 (sfField);
// Avoid divide by zero. NIKB CHECKME: if we
// allow zero qualities now, then we shouldn't.
if (quality == 0)
quality = 1;
return Rate{ quality };
}
bool SerializedLedgerEntry::thread (uint256 const& txID, uint32 ledgerSeq, uint256& prevTxID, uint32& prevLedgerID)
{
uint256 oldPrevTxID = getFieldH256 (sfPreviousTxnID);
WriteLog (lsTRACE, SerializedLedgerLog) << "Thread Tx:" << txID << " prev:" << oldPrevTxID;
if (oldPrevTxID == txID)
{
// this transaction is already threaded
assert (getFieldU32 (sfPreviousTxnLgrSeq) == ledgerSeq);
return false;
}
prevTxID = oldPrevTxID;
prevLedgerID = getFieldU32 (sfPreviousTxnLgrSeq);
setFieldH256 (sfPreviousTxnID, txID);
setFieldU32 (sfPreviousTxnLgrSeq, ledgerSeq);
return true;
}
void
nflags::operator()(Env& env) const
{
auto const sle = env.le(account_);
if (sle->isFieldPresent(sfFlags))
env.test.expect((sle->getFieldU32(sfFlags) &
mask_) == 0);
else
env.test.pass();
}
bool STLedgerEntry::thread (uint256 const& txID, std::uint32_t ledgerSeq,
uint256& prevTxID, std::uint32_t& prevLedgerID)
{
uint256 oldPrevTxID = getFieldH256 (sfPreviousTxnID);
JLOG (debugLog().info())
<< "Thread Tx:" << txID << " prev:" << oldPrevTxID;
if (oldPrevTxID == txID)
{
// this transaction is already threaded
assert (getFieldU32 (sfPreviousTxnLgrSeq) == ledgerSeq);
return false;
}
prevTxID = oldPrevTxID;
prevLedgerID = getFieldU32 (sfPreviousTxnLgrSeq);
setFieldH256 (sfPreviousTxnID, txID);
setFieldU32 (sfPreviousTxnLgrSeq, ledgerSeq);
return true;
}
NotTEC
Transactor::checkSeq (PreclaimContext const& ctx)
{
auto const id = ctx.tx.getAccountID(sfAccount);
auto const sle = ctx.view.read(
keylet::account(id));
if (!sle)
{
JLOG(ctx.j.trace()) <<
"applyTransaction: delay: source account does not exist " <<
toBase58(ctx.tx.getAccountID(sfAccount));
return terNO_ACCOUNT;
}
std::uint32_t const t_seq = ctx.tx.getSequence ();
std::uint32_t const a_seq = sle->getFieldU32 (sfSequence);
if (t_seq != a_seq)
{
if (a_seq < t_seq)
{
JLOG(ctx.j.trace()) <<
"applyTransaction: has future sequence number " <<
"a_seq=" << a_seq << " t_seq=" << t_seq;
return terPRE_SEQ;
}
if (ctx.view.txExists(ctx.tx.getTransactionID ()))
return tefALREADY;
JLOG(ctx.j.trace()) << "applyTransaction: has past sequence number " <<
"a_seq=" << a_seq << " t_seq=" << t_seq;
return tefPAST_SEQ;
}
if (ctx.tx.isFieldPresent (sfAccountTxnID) &&
(sle->getFieldH256 (sfAccountTxnID) != ctx.tx.getFieldH256 (sfAccountTxnID)))
return tefWRONG_PRIOR;
if (ctx.tx.isFieldPresent (sfLastLedgerSequence) &&
(ctx.view.seq() > ctx.tx.getFieldU32 (sfLastLedgerSequence)))
return tefMAX_LEDGER;
return tesSUCCESS;
}
TER
SetTrust::preclaim(PreclaimContext const& ctx)
{
auto const id = ctx.tx[sfAccount];
auto const sle = ctx.view.read(
keylet::account(id));
std::uint32_t const uTxFlags = ctx.tx.getFlags();
bool const bSetAuth = (uTxFlags & tfSetfAuth);
if (bSetAuth && !(sle->getFieldU32(sfFlags) & lsfRequireAuth))
{
JLOG(ctx.j.trace) <<
"Retry: Auth not required.";
return tefNO_AUTH_REQUIRED;
}
auto const saLimitAmount = ctx.tx[sfLimitAmount];
auto const currency = saLimitAmount.getCurrency();
auto const uDstAccountID = saLimitAmount.getIssuer();
if (id == uDstAccountID)
{
// Prevent trustline to self from being created,
// unless one has somehow already been created
// (in which case doApply will clean it up).
auto const sleDelete = ctx.view.read(
keylet::line(id, uDstAccountID, currency));
if (!sleDelete)
{
JLOG(ctx.j.trace) <<
"Malformed transaction: Can not extend credit to self.";
return temDST_IS_SRC;
}
}
return tesSUCCESS;
}
void
fill_seq (Json::Value& jv,
ReadView const& view)
{
if (jv.isMember(jss::Sequence))
return;
auto const account =
parseBase58<AccountID>(
jv[jss::Account].asString());
if (! account)
Throw<parse_error> (
"unexpected invalid Account");
auto const ar = view.read(
keylet::account(*account));
if (! ar)
Throw<parse_error> (
"unexpected missing account root");
jv[jss::Sequence] =
ar->getFieldU32(sfSequence);
}
// {
// account: <account>|<account_public_key>
// account_index: <number> // optional, defaults to 0.
// ledger_hash : <ledger>
// ledger_index : <ledger_index>
// limit: integer // optional
// marker: opaque // optional, resume previous query
// }
Json::Value doAccountOffers (RPC::Context& context)
{
auto const& params (context.params);
if (! params.isMember (jss::account))
return RPC::missing_field_error (jss::account);
Ledger::pointer ledger;
Json::Value result (RPC::lookupLedger (params, ledger, context.netOps));
if (! ledger)
return result;
std::string strIdent (params[jss::account].asString ());
bool bIndex (params.isMember (jss::account_index));
int const iIndex (bIndex ? params[jss::account_index].asUInt () : 0);
DivvyAddress divvyAddress;
Json::Value const jv = RPC::accountFromString (
divvyAddress, bIndex, strIdent, iIndex, false);
if (! jv.empty ())
{
for (Json::Value::const_iterator it (jv.begin ()); it != jv.end (); ++it)
result[it.memberName ()] = it.key ();
return result;
}
// Get info on account.
result[jss::account] = divvyAddress.humanAccountID ();
if (bIndex)
result[jss::account_index] = iIndex;
if (! ledger->exists(getAccountRootIndex(
divvyAddress.getAccountID())))
return rpcError (rpcACT_NOT_FOUND);
unsigned int limit;
if (params.isMember (jss::limit))
{
auto const& jvLimit (params[jss::limit]);
if (! jvLimit.isIntegral ())
return RPC::expected_field_error (jss::limit, "unsigned integer");
limit = jvLimit.isUInt () ? jvLimit.asUInt () :
std::max (0, jvLimit.asInt ());
if (context.role != Role::ADMIN)
{
limit = std::max (RPC::Tuning::minOffersPerRequest,
std::min (limit, RPC::Tuning::maxOffersPerRequest));
}
}
else
{
limit = RPC::Tuning::defaultOffersPerRequest;
}
AccountID const& raAccount (divvyAddress.getAccountID ());
Json::Value& jsonOffers (result[jss::offers] = Json::arrayValue);
std::vector <std::shared_ptr<SLE const>> offers;
unsigned int reserve (limit);
uint256 startAfter;
std::uint64_t startHint;
if (params.isMember(jss::marker))
{
// We have a start point. Use limit - 1 from the result and use the
// very last one for the resume.
Json::Value const& marker (params[jss::marker]);
if (! marker.isString ())
return RPC::expected_field_error (jss::marker, "string");
startAfter.SetHex (marker.asString ());
auto const sleOffer = fetch (*ledger, startAfter,
getApp().getSLECache());
if (sleOffer == nullptr ||
sleOffer->getType () != ltOFFER ||
raAccount != sleOffer->getFieldAccount160 (sfAccount))
{
return rpcError (rpcINVALID_PARAMS);
}
startHint = sleOffer->getFieldU64(sfOwnerNode);
// Caller provided the first offer (startAfter), add it as first result
Json::Value& obj (jsonOffers.append (Json::objectValue));
sleOffer->getFieldAmount (sfTakerPays).setJson (obj[jss::taker_pays]);
sleOffer->getFieldAmount (sfTakerGets).setJson (obj[jss::taker_gets]);
obj[jss::seq] = sleOffer->getFieldU32 (sfSequence);
obj[jss::flags] = sleOffer->getFieldU32 (sfFlags);
offers.reserve (reserve);
}
else
{
startHint = 0;
// We have no start point, limit should be one higher than requested.
offers.reserve (++reserve);
}
if (! forEachItemAfter(*ledger, raAccount, getApp().getSLECache(),
startAfter, startHint, reserve,
[&offers](std::shared_ptr<SLE const> const& offer)
{
if (offer->getType () == ltOFFER)
{
offers.emplace_back (offer);
return true;
}
return false;
}))
{
return rpcError (rpcINVALID_PARAMS);
}
if (offers.size () == reserve)
{
result[jss::limit] = limit;
result[jss::marker] = to_string (offers.back ()->getIndex ());
offers.pop_back ();
}
for (auto const& offer : offers)
{
Json::Value& obj (jsonOffers.append (Json::objectValue));
offer->getFieldAmount (sfTakerPays).setJson (obj[jss::taker_pays]);
offer->getFieldAmount (sfTakerGets).setJson (obj[jss::taker_gets]);
obj[jss::seq] = offer->getFieldU32 (sfSequence);
obj[jss::flags] = offer->getFieldU32 (sfFlags);
}
context.loadType = Resource::feeMediumBurdenRPC;
return result;
}
std::uint32_t STLedgerEntry::getThreadedLedger () const
{
return getFieldU32 (sfPreviousTxnLgrSeq);
}
NetClock::time_point
STValidation::getSignTime () const
{
return NetClock::time_point{NetClock::duration{getFieldU32(sfSigningTime)}};
}
uint32 SerializedValidation::getFlags() const
{
return getFieldU32(sfFlags);
}
uint32 SerializedValidation::getSignTime() const
{
return getFieldU32(sfSigningTime);
}
std::uint32_t SerializedLedgerEntry::getThreadedLedger ()
{
return getFieldU32 (sfPreviousTxnLgrSeq);
}
// Append a node, then create and insert before it any implied nodes. Order
// book nodes may go back to back.
//
// For each non-matching pair of IssuedCurrency, there's an order book.
//
// <-- resultCode: tesSUCCESS, temBAD_PATH, terNO_ACCOUNT, terNO_AUTH,
// terNO_LINE, tecPATH_DRY
TER PathState::pushNode (
const int iType,
AccountID const& account, // If not specified, means an order book.
Currency const& currency, // If not specified, default to previous.
AccountID const& issuer) // If not specified, default to previous.
{
path::Node node;
const bool pathIsEmpty = nodes_.empty ();
// TODO(tom): if pathIsEmpty, we probably don't need to do ANYTHING below.
// Indeed, we might just not even call pushNode in the first place!
auto const& backNode = pathIsEmpty ? path::Node () : nodes_.back ();
// true, iff node is a ripple account. false, iff node is an offer node.
const bool hasAccount = (iType & STPathElement::typeAccount);
// Is currency specified for the output of the current node?
const bool hasCurrency = (iType & STPathElement::typeCurrency);
// Issuer is specified for the output of the current node.
const bool hasIssuer = (iType & STPathElement::typeIssuer);
TER resultCode = tesSUCCESS;
JLOG (j_.trace)
<< "pushNode> " << iType << ": "
<< (hasAccount ? to_string(account) : std::string("-")) << " "
<< (hasCurrency ? to_string(currency) : std::string("-")) << "/"
<< (hasIssuer ? to_string(issuer) : std::string("-")) << "/";
node.uFlags = iType;
node.issue_.currency = hasCurrency ?
currency : backNode.issue_.currency;
// TODO(tom): we can probably just return immediately whenever we hit an
// error in these next pages.
if (iType & ~STPathElement::typeAll)
{
// Of course, this could never happen.
JLOG (j_.debug) << "pushNode: bad bits.";
resultCode = temBAD_PATH;
}
else if (hasIssuer && isXRP (node.issue_))
{
JLOG (j_.debug) << "pushNode: issuer specified for XRP.";
resultCode = temBAD_PATH;
}
else if (hasIssuer && !issuer)
{
JLOG (j_.debug) << "pushNode: specified bad issuer.";
resultCode = temBAD_PATH;
}
else if (!hasAccount && !hasCurrency && !hasIssuer)
{
// You can't default everything to the previous node as you would make
// no progress.
JLOG (j_.debug)
<< "pushNode: offer must specify at least currency or issuer.";
resultCode = temBAD_PATH;
}
else if (hasAccount)
{
// Account link
node.account_ = account;
node.issue_.account = hasIssuer ? issuer :
(isXRP (node.issue_) ? xrpAccount() : account);
// Zero value - for accounts.
node.saRevRedeem = STAmount ({node.issue_.currency, account});
node.saRevIssue = node.saRevRedeem;
// For order books only - zero currency with the issuer ID.
node.saRevDeliver = STAmount (node.issue_);
node.saFwdDeliver = node.saRevDeliver;
if (pathIsEmpty)
{
// The first node is always correct as is.
}
else if (!account)
{
JLOG (j_.debug)
<< "pushNode: specified bad account.";
resultCode = temBAD_PATH;
}
else
{
// Add required intermediate nodes to deliver to current account.
JLOG (j_.trace)
<< "pushNode: imply for account.";
resultCode = pushImpliedNodes (
node.account_,
node.issue_.currency,
isXRP(node.issue_.currency) ? xrpAccount() : account);
// Note: backNode may no longer be the immediately previous node.
}
if (resultCode == tesSUCCESS && !nodes_.empty ())
{
auto const& backNode = nodes_.back ();
if (backNode.isAccount())
{
auto sleRippleState = view().peek(
keylet::line(backNode.account_, node.account_, backNode.issue_.currency));
// A "RippleState" means a balance betweeen two accounts for a
// specific currency.
if (!sleRippleState)
{
JLOG (j_.trace)
<< "pushNode: No credit line between "
<< backNode.account_ << " and " << node.account_
<< " for " << node.issue_.currency << "." ;
JLOG (j_.trace) << getJson ();
resultCode = terNO_LINE;
}
else
{
JLOG (j_.trace)
<< "pushNode: Credit line found between "
<< backNode.account_ << " and " << node.account_
<< " for " << node.issue_.currency << "." ;
auto sleBck = view().peek (
keylet::account(backNode.account_));
// Is the source account the highest numbered account ID?
bool bHigh = backNode.account_ > node.account_;
if (!sleBck)
{
JLOG (j_.warning)
<< "pushNode: delay: can't receive IOUs from "
<< "non-existent issuer: " << backNode.account_;
resultCode = terNO_ACCOUNT;
}
else if ((sleBck->getFieldU32 (sfFlags) & lsfRequireAuth) &&
!(sleRippleState->getFieldU32 (sfFlags) &
(bHigh ? lsfHighAuth : lsfLowAuth)) &&
sleRippleState->getFieldAmount(sfBalance) == zero)
{
JLOG (j_.warning)
<< "pushNode: delay: can't receive IOUs from "
<< "issuer without auth.";
resultCode = terNO_AUTH;
}
if (resultCode == tesSUCCESS)
{
STAmount saOwed = creditBalance (view(),
node.account_, backNode.account_,
node.issue_.currency);
STAmount saLimit;
if (saOwed <= zero)
{
saLimit = creditLimit (view(),
node.account_,
backNode.account_,
node.issue_.currency);
if (-saOwed >= saLimit)
{
JLOG (j_.debug) <<
"pushNode: dry:" <<
" saOwed=" << saOwed <<
" saLimit=" << saLimit;
resultCode = tecPATH_DRY;
}
}
}
}
}
}
if (resultCode == tesSUCCESS)
nodes_.push_back (node);
}
else
{
// Offer link.
//
// Offers bridge a change in currency and issuer, or just a change in
// issuer.
if (hasIssuer)
node.issue_.account = issuer;
else if (isXRP (node.issue_.currency))
node.issue_.account = xrpAccount();
else if (isXRP (backNode.issue_.account))
node.issue_.account = backNode.account_;
else
node.issue_.account = backNode.issue_.account;
node.saRateMax = STAmount::saZero;
node.saRevDeliver = STAmount (node.issue_);
node.saFwdDeliver = node.saRevDeliver;
if (!isConsistent (node.issue_))
{
JLOG (j_.debug)
<< "pushNode: currency is inconsistent with issuer.";
resultCode = temBAD_PATH;
}
else if (backNode.issue_ == node.issue_)
{
JLOG (j_.debug) <<
"pushNode: bad path: offer to same currency and issuer";
resultCode = temBAD_PATH;
}
else {
JLOG (j_.trace) << "pushNode: imply for offer.";
// Insert intermediary issuer account if needed.
resultCode = pushImpliedNodes (
xrpAccount(), // Rippling, but offers don't have an account.
backNode.issue_.currency,
backNode.issue_.account);
}
if (resultCode == tesSUCCESS)
nodes_.push_back (node);
}
JLOG (j_.trace) << "pushNode< : " << transToken (resultCode);
return resultCode;
}
TER
CreateTicket::doApply ()
{
auto const sle = view().peek(keylet::account(account_));
// A ticket counts against the reserve of the issuing account, but we
// check the starting balance because we want to allow dipping into the
// reserve to pay fees.
{
auto const reserve = view().fees().accountReserve(
sle->getFieldU32(sfOwnerCount) + 1);
if (mPriorBalance < reserve)
return tecINSUFFICIENT_RESERVE;
}
NetClock::time_point expiration{};
if (ctx_.tx.isFieldPresent (sfExpiration))
{
expiration = NetClock::time_point(NetClock::duration(ctx_.tx[sfExpiration]));
if (view().parentCloseTime() >= expiration)
return tesSUCCESS;
}
SLE::pointer sleTicket = std::make_shared<SLE>(ltTICKET,
getTicketIndex (account_, ctx_.tx.getSequence ()));
sleTicket->setAccountID (sfAccount, account_);
sleTicket->setFieldU32 (sfSequence, ctx_.tx.getSequence ());
if (expiration != NetClock::time_point{})
sleTicket->setFieldU32 (sfExpiration, expiration.time_since_epoch().count());
view().insert (sleTicket);
if (ctx_.tx.isFieldPresent (sfTarget))
{
AccountID const target_account (ctx_.tx.getAccountID (sfTarget));
SLE::pointer sleTarget = view().peek (keylet::account(target_account));
// Destination account does not exist.
if (!sleTarget)
return tecNO_TARGET;
// The issuing account is the default account to which the ticket
// applies so don't bother saving it if that's what's specified.
if (target_account != account_)
sleTicket->setAccountID (sfTarget, target_account);
}
auto viewJ = ctx_.app.journal ("View");
auto const page = dirAdd(view(), keylet::ownerDir (account_),
sleTicket->key(), false, describeOwnerDir (account_), viewJ);
JLOG(j_.trace()) <<
"Creating ticket " << to_string (sleTicket->key()) <<
": " << (page ? "success" : "failure");
if (!page)
return tecDIR_FULL;
sleTicket->setFieldU64(sfOwnerNode, *page);
// If we succeeded, the new entry counts against the
// creator's reserve.
adjustOwnerCount(view(), sle, 1, viewJ);
return tesSUCCESS;
}
// account_dividend [account]
Json::Value doAccountDividend (RPC::Context& context)
{
auto const& params (context.params);
if (! params.isMember (jss::account))
return RPC::missing_field_error (jss::account);
std::shared_ptr<ReadView const> ledger;
auto result = RPC::lookupLedger (ledger, context);
if (! ledger)
return result;
std::string strIdent (params[jss::account].asString ());
AccountID accountID;
if (auto jv = RPC::accountFromString (accountID, strIdent))
{
for (auto it = jv.begin (); it != jv.end (); ++it)
result[it.memberName ()] = it.key ();
return result;
}
auto accountSLE = ledger->read (keylet::account (accountID));
if (!accountSLE)
return rpcError (rpcACT_NOT_FOUND);
result[jss::account] = context.app.accountIDCache ().toBase58 (accountID);
std::uint32_t baseLedgerSeq = 0;
auto dividendSLE = ledger->read (keylet::dividend ());
if (dividendSLE)
{
if (dividendSLE->getFieldU8 (sfDividendState) != DividendMaster::DivState_Done)
{
return RPC::make_error (rpcNOT_READY, "Dividend in progress");
}
Json::Value resumeToken;
baseLedgerSeq = dividendSLE->getFieldU32 (sfDividendLedger);
auto txns = context.netOps.getTxsAccount (
accountID, baseLedgerSeq, ledger->info ().seq, false, resumeToken, 1,
context.role == Role::ADMIN, "Dividend");
if (!txns.empty ())
{
auto& txn = txns.begin ()->first->getSTransaction ();
result["DividendCoins"] = to_string (txn->getFieldU64 (sfDividendCoins));
result["DividendCoinsVBC"] = to_string (txn->getFieldU64 (sfDividendCoinsVBC));
result["DividendCoinsVBCRank"] = to_string (txn->getFieldU64 (sfDividendCoinsVBCRank));
result["DividendCoinsVBCSprd"] = to_string (txn->getFieldU64 (sfDividendCoinsVBCSprd));
result["DividendTSprd"] = to_string (txn->getFieldU64 (sfDividendTSprd));
result["DividendVRank"] = to_string (txn->getFieldU64 (sfDividendVRank));
result["DividendVSprd"] = to_string (txn->getFieldU64 (sfDividendVSprd));
result["DividendLedger"] = to_string (txn->getFieldU32 (sfDividendLedger));
return result;
}
}
result["DividendCoins"] = "0";
result["DividendCoinsVBC"] = "0";
result["DividendCoinsVBCRank"] = "0";
result["DividendCoinsVBCSprd"] = "0";
result["DividendTSprd"] = "0";
result["DividendVRank"] = "0";
result["DividendVSprd"] = "0";
result["DividendLedger"] = to_string (baseLedgerSeq);
return result;
}
TER
SetTrust::doApply ()
{
TER terResult = tesSUCCESS;
STAmount const saLimitAmount (tx().getFieldAmount (sfLimitAmount));
bool const bQualityIn (tx().isFieldPresent (sfQualityIn));
bool const bQualityOut (tx().isFieldPresent (sfQualityOut));
Currency const currency (saLimitAmount.getCurrency ());
AccountID uDstAccountID (saLimitAmount.getIssuer ());
// true, iff current is high account.
bool const bHigh = account_ > uDstAccountID;
auto const sle = view().peek(
keylet::account(account_));
std::uint32_t const uOwnerCount = sle->getFieldU32 (sfOwnerCount);
// The reserve required to create the line. Note that we allow up to
// two trust lines without requiring a reserve because being able to
// exchange currencies is a powerful Ripple feature.
//
// This is also a security feature: if you're a gateway and you want to
// be able to let someone use your services, you would otherwise have to
// give them enough XRP to cover the incremental reserve for their trust
// line. If they had no intention of using your services, they could use
// the XRP for their own purposes. So we make it possible for gateways
// to fund accounts in a way where there's no incentive to trick them
// into creating an account you have no intention of using.
XRPAmount const reserveCreate ((uOwnerCount < 2)
? XRPAmount (zero)
: view().fees().accountReserve(uOwnerCount + 1));
std::uint32_t uQualityIn (bQualityIn ? tx().getFieldU32 (sfQualityIn) : 0);
std::uint32_t uQualityOut (bQualityOut ? tx().getFieldU32 (sfQualityOut) : 0);
if (bQualityOut && QUALITY_ONE == uQualityOut)
uQualityOut = 0;
std::uint32_t const uTxFlags = tx().getFlags ();
bool const bSetAuth = (uTxFlags & tfSetfAuth);
bool const bSetNoRipple = (uTxFlags & tfSetNoRipple);
bool const bClearNoRipple = (uTxFlags & tfClearNoRipple);
bool const bSetFreeze = (uTxFlags & tfSetFreeze);
bool const bClearFreeze = (uTxFlags & tfClearFreeze);
auto viewJ = ctx_.app.journal ("View");
if (bSetAuth && !(sle->getFieldU32 (sfFlags) & lsfRequireAuth))
{
j_.trace <<
"Retry: Auth not required.";
return tefNO_AUTH_REQUIRED;
}
if (account_ == uDstAccountID)
{
// The only purpose here is to allow a mistakenly created
// trust line to oneself to be deleted. If no such trust
// lines exist now, why not remove this code and simply
// return an error?
SLE::pointer sleDelete = view().peek (
keylet::line(account_, uDstAccountID, currency));
if (sleDelete)
{
j_.warning <<
"Clearing redundant line.";
return trustDelete (view(),
sleDelete, account_, uDstAccountID, viewJ);
}
else
{
j_.trace <<
"Malformed transaction: Can not extend credit to self.";
return temDST_IS_SRC;
}
}
SLE::pointer sleDst =
view().peek (keylet::account(uDstAccountID));
if (!sleDst)
{
j_.trace <<
"Delay transaction: Destination account does not exist.";
return tecNO_DST;
}
STAmount saLimitAllow = saLimitAmount;
saLimitAllow.setIssuer (account_);
SLE::pointer sleRippleState = view().peek (
keylet::line(account_, uDstAccountID, currency));
if (sleRippleState)
{
STAmount saLowBalance;
STAmount saLowLimit;
STAmount saHighBalance;
STAmount saHighLimit;
std::uint32_t uLowQualityIn;
std::uint32_t uLowQualityOut;
std::uint32_t uHighQualityIn;
std::uint32_t uHighQualityOut;
auto const& uLowAccountID = !bHigh ? account_ : uDstAccountID;
auto const& uHighAccountID = bHigh ? account_ : uDstAccountID;
SLE::ref sleLowAccount = !bHigh ? sle : sleDst;
SLE::ref sleHighAccount = bHigh ? sle : sleDst;
//
// Balances
//
saLowBalance = sleRippleState->getFieldAmount (sfBalance);
saHighBalance = -saLowBalance;
//
// Limits
//
sleRippleState->setFieldAmount (!bHigh ? sfLowLimit : sfHighLimit, saLimitAllow);
saLowLimit = !bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfLowLimit);
saHighLimit = bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfHighLimit);
//
// Quality in
//
if (!bQualityIn)
{
// Not setting. Just get it.
uLowQualityIn = sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = sleRippleState->getFieldU32 (sfHighQualityIn);
}
else if (uQualityIn)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityIn : sfHighQualityIn, uQualityIn);
uLowQualityIn = !bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfHighQualityIn);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityIn : sfHighQualityIn);
uLowQualityIn = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityIn);
}
if (QUALITY_ONE == uLowQualityIn) uLowQualityIn = 0;
if (QUALITY_ONE == uHighQualityIn) uHighQualityIn = 0;
//
// Quality out
//
if (!bQualityOut)
{
// Not setting. Just get it.
uLowQualityOut = sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = sleRippleState->getFieldU32 (sfHighQualityOut);
}
else if (uQualityOut)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityOut : sfHighQualityOut, uQualityOut);
uLowQualityOut = !bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfHighQualityOut);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityOut : sfHighQualityOut);
uLowQualityOut = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityOut);
}
std::uint32_t const uFlagsIn (sleRippleState->getFieldU32 (sfFlags));
std::uint32_t uFlagsOut (uFlagsIn);
if (bSetNoRipple && !bClearNoRipple && (bHigh ? saHighBalance : saLowBalance) >= zero)
{
uFlagsOut |= (bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
else if (bClearNoRipple && !bSetNoRipple)
{
uFlagsOut &= ~(bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
if (bSetFreeze && !bClearFreeze && !sle->isFlag (lsfNoFreeze))
{
uFlagsOut |= (bHigh ? lsfHighFreeze : lsfLowFreeze);
}
else if (bClearFreeze && !bSetFreeze)
{
uFlagsOut &= ~(bHigh ? lsfHighFreeze : lsfLowFreeze);
}
if (QUALITY_ONE == uLowQualityOut) uLowQualityOut = 0;
if (QUALITY_ONE == uHighQualityOut) uHighQualityOut = 0;
bool const bLowDefRipple = sleLowAccount->getFlags() & lsfDefaultRipple;
bool const bHighDefRipple = sleHighAccount->getFlags() & lsfDefaultRipple;
bool const bLowReserveSet = uLowQualityIn || uLowQualityOut ||
((uFlagsOut & lsfLowNoRipple) == 0) != bLowDefRipple ||
(uFlagsOut & lsfLowFreeze) ||
saLowLimit || saLowBalance > zero;
bool const bLowReserveClear = !bLowReserveSet;
bool const bHighReserveSet = uHighQualityIn || uHighQualityOut ||
((uFlagsOut & lsfHighNoRipple) == 0) != bHighDefRipple ||
(uFlagsOut & lsfHighFreeze) ||
saHighLimit || saHighBalance > zero;
bool const bHighReserveClear = !bHighReserveSet;
bool const bDefault = bLowReserveClear && bHighReserveClear;
bool const bLowReserved = (uFlagsIn & lsfLowReserve);
bool const bHighReserved = (uFlagsIn & lsfHighReserve);
bool bReserveIncrease = false;
if (bSetAuth)
{
uFlagsOut |= (bHigh ? lsfHighAuth : lsfLowAuth);
}
if (bLowReserveSet && !bLowReserved)
{
// Set reserve for low account.
adjustOwnerCount(view(),
sleLowAccount, 1, viewJ);
uFlagsOut |= lsfLowReserve;
if (!bHigh)
bReserveIncrease = true;
}
if (bLowReserveClear && bLowReserved)
{
// Clear reserve for low account.
adjustOwnerCount(view(),
sleLowAccount, -1, viewJ);
uFlagsOut &= ~lsfLowReserve;
}
if (bHighReserveSet && !bHighReserved)
{
// Set reserve for high account.
adjustOwnerCount(view(),
sleHighAccount, 1, viewJ);
uFlagsOut |= lsfHighReserve;
if (bHigh)
bReserveIncrease = true;
}
if (bHighReserveClear && bHighReserved)
{
// Clear reserve for high account.
adjustOwnerCount(view(),
sleHighAccount, -1, viewJ);
uFlagsOut &= ~lsfHighReserve;
}
if (uFlagsIn != uFlagsOut)
sleRippleState->setFieldU32 (sfFlags, uFlagsOut);
if (bDefault || badCurrency() == currency)
{
// Delete.
terResult = trustDelete (view(),
sleRippleState, uLowAccountID, uHighAccountID, viewJ);
}
// Reserve is not scaled by load.
else if (bReserveIncrease && mPriorBalance < reserveCreate)
{
j_.trace <<
"Delay transaction: Insufficent reserve to add trust line.";
// Another transaction could provide XRP to the account and then
// this transaction would succeed.
terResult = tecINSUF_RESERVE_LINE;
}
else
{
view().update (sleRippleState);
j_.trace << "Modify ripple line";
}
}
// Line does not exist.
else if (! saLimitAmount && // Setting default limit.
(! bQualityIn || ! uQualityIn) && // Not setting quality in or setting default quality in.
(! bQualityOut || ! uQualityOut) && // Not setting quality out or setting default quality out.
(! ((view().flags() & tapENABLE_TESTING) ||
view().rules().enabled(featureTrustSetAuth,
ctx_.config.features)) || ! bSetAuth))
{
j_.trace <<
"Redundant: Setting non-existent ripple line to defaults.";
return tecNO_LINE_REDUNDANT;
}
else if (mPriorBalance < reserveCreate) // Reserve is not scaled by load.
{
j_.trace <<
"Delay transaction: Line does not exist. Insufficent reserve to create line.";
// Another transaction could create the account and then this transaction would succeed.
terResult = tecNO_LINE_INSUF_RESERVE;
}
else
{
// Zero balance in currency.
STAmount saBalance ({currency, noAccount()});
uint256 index (getRippleStateIndex (
account_, uDstAccountID, currency));
j_.trace <<
"doTrustSet: Creating ripple line: " <<
to_string (index);
// Create a new ripple line.
terResult = trustCreate (view(),
bHigh,
account_,
uDstAccountID,
index,
sle,
bSetAuth,
bSetNoRipple && !bClearNoRipple,
bSetFreeze && !bClearFreeze,
saBalance,
saLimitAllow, // Limit for who is being charged.
uQualityIn,
uQualityOut, viewJ);
}
return terResult;
}
NotTEC
Transactor::checkMultiSign (PreclaimContext const& ctx)
{
auto const id = ctx.tx.getAccountID(sfAccount);
// Get mTxnAccountID's SignerList and Quorum.
std::shared_ptr<STLedgerEntry const> sleAccountSigners =
ctx.view.read (keylet::signers(id));
// If the signer list doesn't exist the account is not multi-signing.
if (!sleAccountSigners)
{
JLOG(ctx.j.trace()) <<
"applyTransaction: Invalid: Not a multi-signing account.";
return tefNOT_MULTI_SIGNING;
}
// We have plans to support multiple SignerLists in the future. The
// presence and defaulted value of the SignerListID field will enable that.
assert (sleAccountSigners->isFieldPresent (sfSignerListID));
assert (sleAccountSigners->getFieldU32 (sfSignerListID) == 0);
auto accountSigners =
SignerEntries::deserialize (*sleAccountSigners, ctx.j, "ledger");
if (accountSigners.second != tesSUCCESS)
return accountSigners.second;
// Get the array of transaction signers.
STArray const& txSigners (ctx.tx.getFieldArray (sfSigners));
// Walk the accountSigners performing a variety of checks and see if
// the quorum is met.
// Both the multiSigners and accountSigners are sorted by account. So
// matching multi-signers to account signers should be a simple
// linear walk. *All* signers must be valid or the transaction fails.
std::uint32_t weightSum = 0;
auto iter = accountSigners.first.begin ();
for (auto const& txSigner : txSigners)
{
AccountID const txSignerAcctID = txSigner.getAccountID (sfAccount);
// Attempt to match the SignerEntry with a Signer;
while (iter->account < txSignerAcctID)
{
if (++iter == accountSigners.first.end ())
{
JLOG(ctx.j.trace()) <<
"applyTransaction: Invalid SigningAccount.Account.";
return tefBAD_SIGNATURE;
}
}
if (iter->account != txSignerAcctID)
{
// The SigningAccount is not in the SignerEntries.
JLOG(ctx.j.trace()) <<
"applyTransaction: Invalid SigningAccount.Account.";
return tefBAD_SIGNATURE;
}
// We found the SigningAccount in the list of valid signers. Now we
// need to compute the accountID that is associated with the signer's
// public key.
auto const spk = txSigner.getFieldVL (sfSigningPubKey);
if (!publicKeyType (makeSlice(spk)))
{
JLOG(ctx.j.trace()) <<
"checkMultiSign: signing public key type is unknown";
return tefBAD_SIGNATURE;
}
AccountID const signingAcctIDFromPubKey =
calcAccountID(PublicKey (makeSlice(spk)));
// Verify that the signingAcctID and the signingAcctIDFromPubKey
// belong together. Here is are the rules:
//
// 1. "Phantom account": an account that is not in the ledger
// A. If signingAcctID == signingAcctIDFromPubKey and the
// signingAcctID is not in the ledger then we have a phantom
// account.
// B. Phantom accounts are always allowed as multi-signers.
//
// 2. "Master Key"
// A. signingAcctID == signingAcctIDFromPubKey, and signingAcctID
// is in the ledger.
// B. If the signingAcctID in the ledger does not have the
// asfDisableMaster flag set, then the signature is allowed.
//
// 3. "Regular Key"
// A. signingAcctID != signingAcctIDFromPubKey, and signingAcctID
// is in the ledger.
// B. If signingAcctIDFromPubKey == signingAcctID.RegularKey (from
// ledger) then the signature is allowed.
//
// No other signatures are allowed. (January 2015)
// In any of these cases we need to know whether the account is in
// the ledger. Determine that now.
auto sleTxSignerRoot =
ctx.view.read (keylet::account(txSignerAcctID));
if (signingAcctIDFromPubKey == txSignerAcctID)
{
// Either Phantom or Master. Phantoms automatically pass.
if (sleTxSignerRoot)
{
// Master Key. Account may not have asfDisableMaster set.
std::uint32_t const signerAccountFlags =
sleTxSignerRoot->getFieldU32 (sfFlags);
if (signerAccountFlags & lsfDisableMaster)
{
JLOG(ctx.j.trace()) <<
"applyTransaction: Signer:Account lsfDisableMaster.";
return tefMASTER_DISABLED;
}
}
}
else
{
// May be a Regular Key. Let's find out.
// Public key must hash to the account's regular key.
if (!sleTxSignerRoot)
{
JLOG(ctx.j.trace()) <<
"applyTransaction: Non-phantom signer lacks account root.";
return tefBAD_SIGNATURE;
}
if (!sleTxSignerRoot->isFieldPresent (sfRegularKey))
{
JLOG(ctx.j.trace()) <<
"applyTransaction: Account lacks RegularKey.";
return tefBAD_SIGNATURE;
}
if (signingAcctIDFromPubKey !=
sleTxSignerRoot->getAccountID (sfRegularKey))
{
JLOG(ctx.j.trace()) <<
"applyTransaction: Account doesn't match RegularKey.";
return tefBAD_SIGNATURE;
}
}
// The signer is legitimate. Add their weight toward the quorum.
weightSum += iter->weight;
}
// Cannot perform transaction if quorum is not met.
if (weightSum < sleAccountSigners->getFieldU32 (sfSignerQuorum))
{
JLOG(ctx.j.trace()) <<
"applyTransaction: Signers failed to meet quorum.";
return tefBAD_QUORUM;
}
// Met the quorum. Continue.
return tesSUCCESS;
}
std::uint32_t STValidation::getFlags () const
{
return getFieldU32 (sfFlags);
}
TER
SetAccount::doApply ()
{
std::uint32_t const uTxFlags = ctx_.tx.getFlags ();
auto const sle = view().peek(
keylet::account(account_));
std::uint32_t const uFlagsIn = sle->getFieldU32 (sfFlags);
std::uint32_t uFlagsOut = uFlagsIn;
std::uint32_t const uSetFlag = ctx_.tx.getFieldU32 (sfSetFlag);
std::uint32_t const uClearFlag = ctx_.tx.getFieldU32 (sfClearFlag);
// legacy AccountSet flags
bool bSetRequireDest = (uTxFlags & TxFlag::requireDestTag) || (uSetFlag == asfRequireDest);
bool bClearRequireDest = (uTxFlags & tfOptionalDestTag) || (uClearFlag == asfRequireDest);
bool bSetRequireAuth = (uTxFlags & tfRequireAuth) || (uSetFlag == asfRequireAuth);
bool bClearRequireAuth = (uTxFlags & tfOptionalAuth) || (uClearFlag == asfRequireAuth);
bool bSetDisallowXRP = (uTxFlags & tfDisallowXRP) || (uSetFlag == asfDisallowXRP);
bool bClearDisallowXRP = (uTxFlags & tfAllowXRP) || (uClearFlag == asfDisallowXRP);
bool sigWithMaster = false;
{
auto const blob = ctx_.tx.getSigningPubKey();
if (!blob.empty ())
{
auto const signingPubKey =
RippleAddress::createAccountPublic(blob);
if (calcAccountID(signingPubKey) == account_)
sigWithMaster = true;
}
}
//
// RequireAuth
//
if (bSetRequireAuth && !(uFlagsIn & lsfRequireAuth))
{
j_.trace << "Set RequireAuth.";
uFlagsOut |= lsfRequireAuth;
}
if (bClearRequireAuth && (uFlagsIn & lsfRequireAuth))
{
j_.trace << "Clear RequireAuth.";
uFlagsOut &= ~lsfRequireAuth;
}
//
// RequireDestTag
//
if (bSetRequireDest && !(uFlagsIn & lsfRequireDestTag))
{
j_.trace << "Set lsfRequireDestTag.";
uFlagsOut |= lsfRequireDestTag;
}
if (bClearRequireDest && (uFlagsIn & lsfRequireDestTag))
{
j_.trace << "Clear lsfRequireDestTag.";
uFlagsOut &= ~lsfRequireDestTag;
}
//
// DisallowXRP
//
if (bSetDisallowXRP && !(uFlagsIn & lsfDisallowXRP))
{
j_.trace << "Set lsfDisallowXRP.";
uFlagsOut |= lsfDisallowXRP;
}
if (bClearDisallowXRP && (uFlagsIn & lsfDisallowXRP))
{
j_.trace << "Clear lsfDisallowXRP.";
uFlagsOut &= ~lsfDisallowXRP;
}
//
// DisableMaster
//
if ((uSetFlag == asfDisableMaster) && !(uFlagsIn & lsfDisableMaster))
{
if (!sigWithMaster)
{
j_.trace << "Must use master key to disable master key.";
return tecNEED_MASTER_KEY;
}
if ((!sle->isFieldPresent (sfRegularKey)) &&
(!view().peek (keylet::signers (account_))))
{
// Account has no regular key or multi-signer signer list.
// Prevent transaction changes until we're ready.
if (view().rules().enabled(featureMultiSign,
ctx_.app.config().features))
return tecNO_ALTERNATIVE_KEY;
return tecNO_REGULAR_KEY;
}
j_.trace << "Set lsfDisableMaster.";
uFlagsOut |= lsfDisableMaster;
}
if ((uClearFlag == asfDisableMaster) && (uFlagsIn & lsfDisableMaster))
{
j_.trace << "Clear lsfDisableMaster.";
uFlagsOut &= ~lsfDisableMaster;
}
//
// DefaultRipple
//
if (uSetFlag == asfDefaultRipple)
{
uFlagsOut |= lsfDefaultRipple;
}
else if (uClearFlag == asfDefaultRipple)
{
uFlagsOut &= ~lsfDefaultRipple;
}
//
// NoFreeze
//
if (uSetFlag == asfNoFreeze)
{
if (!sigWithMaster && !(uFlagsIn & lsfDisableMaster))
{
j_.trace << "Can't use regular key to set NoFreeze.";
return tecNEED_MASTER_KEY;
}
j_.trace << "Set NoFreeze flag";
uFlagsOut |= lsfNoFreeze;
}
// Anyone may set global freeze
if (uSetFlag == asfGlobalFreeze)
{
j_.trace << "Set GlobalFreeze flag";
uFlagsOut |= lsfGlobalFreeze;
}
// If you have set NoFreeze, you may not clear GlobalFreeze
// This prevents those who have set NoFreeze from using
// GlobalFreeze strategically.
if ((uSetFlag != asfGlobalFreeze) && (uClearFlag == asfGlobalFreeze) &&
((uFlagsOut & lsfNoFreeze) == 0))
{
j_.trace << "Clear GlobalFreeze flag";
uFlagsOut &= ~lsfGlobalFreeze;
}
//
// Track transaction IDs signed by this account in its root
//
if ((uSetFlag == asfAccountTxnID) && !sle->isFieldPresent (sfAccountTxnID))
{
j_.trace << "Set AccountTxnID";
sle->makeFieldPresent (sfAccountTxnID);
}
if ((uClearFlag == asfAccountTxnID) && sle->isFieldPresent (sfAccountTxnID))
{
j_.trace << "Clear AccountTxnID";
sle->makeFieldAbsent (sfAccountTxnID);
}
//
// EmailHash
//
if (ctx_.tx.isFieldPresent (sfEmailHash))
{
uint128 const uHash = ctx_.tx.getFieldH128 (sfEmailHash);
if (!uHash)
{
j_.trace << "unset email hash";
sle->makeFieldAbsent (sfEmailHash);
}
else
{
j_.trace << "set email hash";
sle->setFieldH128 (sfEmailHash, uHash);
}
}
//
// WalletLocator
//
if (ctx_.tx.isFieldPresent (sfWalletLocator))
{
uint256 const uHash = ctx_.tx.getFieldH256 (sfWalletLocator);
if (!uHash)
{
j_.trace << "unset wallet locator";
sle->makeFieldAbsent (sfWalletLocator);
}
else
{
j_.trace << "set wallet locator";
sle->setFieldH256 (sfWalletLocator, uHash);
}
}
//
// MessageKey
//
if (ctx_.tx.isFieldPresent (sfMessageKey))
{
Blob const messageKey = ctx_.tx.getFieldVL (sfMessageKey);
if (messageKey.empty ())
{
j_.debug << "set message key";
sle->makeFieldAbsent (sfMessageKey);
}
else
{
j_.debug << "set message key";
sle->setFieldVL (sfMessageKey, messageKey);
}
}
//
// Domain
//
if (ctx_.tx.isFieldPresent (sfDomain))
{
Blob const domain = ctx_.tx.getFieldVL (sfDomain);
if (domain.empty ())
{
j_.trace << "unset domain";
sle->makeFieldAbsent (sfDomain);
}
else
{
j_.trace << "set domain";
sle->setFieldVL (sfDomain, domain);
}
}
//
// TransferRate
//
if (ctx_.tx.isFieldPresent (sfTransferRate))
{
std::uint32_t uRate = ctx_.tx.getFieldU32 (sfTransferRate);
if (uRate == 0 || uRate == QUALITY_ONE)
{
j_.trace << "unset transfer rate";
sle->makeFieldAbsent (sfTransferRate);
}
else if (uRate > QUALITY_ONE)
{
j_.trace << "set transfer rate";
sle->setFieldU32 (sfTransferRate, uRate);
}
}
if (uFlagsIn != uFlagsOut)
sle->setFieldU32 (sfFlags, uFlagsOut);
return tesSUCCESS;
}
