bool
AllowTrustOpFrame::doApply(LedgerDelta& delta, LedgerManager& ledgerManager)
{
if (!(mSourceAccount->getAccount().flags & AUTH_REQUIRED_FLAG))
{ // this account doesn't require authorization to hold credit
innerResult().code(ALLOW_TRUST_TRUST_NOT_REQUIRED);
return false;
}
if (!(mSourceAccount->getAccount().flags & AUTH_REVOCABLE_FLAG) &&
!mAllowTrust.authorize)
{
innerResult().code(ALLOW_TRUST_CANT_REVOKE);
return false;
}
Currency ci;
ci.type(CURRENCY_TYPE_ALPHANUM);
ci.alphaNum().currencyCode = mAllowTrust.currency.currencyCode();
ci.alphaNum().issuer = getSourceID();
Database& db = ledgerManager.getDatabase();
TrustFrame::pointer trustLine;
trustLine = TrustFrame::loadTrustLine(mAllowTrust.trustor, ci, db);
if (!trustLine)
{
innerResult().code(ALLOW_TRUST_NO_TRUST_LINE);
return false;
}
innerResult().code(ALLOW_TRUST_SUCCESS);
trustLine->setAuthorized(mAllowTrust.authorize);
trustLine->storeChange(delta, db);
return true;
}
bool
PathPaymentOpFrame::doApply(medida::MetricsRegistry& metrics,
LedgerDelta& delta, LedgerManager& ledgerManager)
{
Database& db = ledgerManager.getDatabase();
innerResult().code(PATH_PAYMENT_SUCCESS);
// tracks the last amount that was traded
int64_t curBReceived = mPathPayment.destAmount;
Asset curB = mPathPayment.destAsset;
// update balances, walks backwards
// build the full path to the destination, starting with sendAsset
std::vector<Asset> fullPath;
fullPath.emplace_back(mPathPayment.sendAsset);
fullPath.insert(fullPath.end(), mPathPayment.path.begin(),
mPathPayment.path.end());
bool bypassIssuerCheck = false;
// if the payment doesn't involve intermediate accounts
// and the destination is the issuer we don't bother
// checking if the destination account even exist
// so that it's always possible to send credits back to its issuer
bypassIssuerCheck = (curB.type() != ASSET_TYPE_NATIVE) &&
(fullPath.size() == 1) &&
(mPathPayment.sendAsset == mPathPayment.destAsset) &&
(getIssuer(curB) == mPathPayment.destination);
AccountFrame::pointer destination;
if (!bypassIssuerCheck)
{
destination = AccountFrame::loadAccount(mPathPayment.destination, db);
if (!destination)
{
metrics.NewMeter({"op-path-payment", "failure", "no-destination"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NO_DESTINATION);
return false;
}
}
// update last balance in the chain
if (curB.type() == ASSET_TYPE_NATIVE)
{
destination->getAccount().balance += curBReceived;
destination->storeChange(delta, db);
}
else
{
TrustFrame::pointer destLine;
if (bypassIssuerCheck)
{
destLine =
TrustFrame::loadTrustLine(mPathPayment.destination, curB, db);
}
else
{
auto tlI = TrustFrame::loadTrustLineIssuer(mPathPayment.destination,
curB, db);
if (!tlI.second)
{
metrics.NewMeter({"op-path-payment", "failure", "no-issuer"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NO_ISSUER);
innerResult().noIssuer() = curB;
return false;
}
destLine = tlI.first;
}
if (!destLine)
{
metrics.NewMeter({"op-path-payment", "failure", "no-trust"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NO_TRUST);
return false;
}
if (!destLine->isAuthorized())
{
metrics.NewMeter({"op-path-payment", "failure", "not-authorized"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NOT_AUTHORIZED);
return false;
}
if (!destLine->addBalance(curBReceived))
{
metrics.NewMeter({"op-path-payment", "failure", "line-full"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_LINE_FULL);
return false;
}
destLine->storeChange(delta, db);
}
innerResult().success().last =
SimplePaymentResult(mPathPayment.destination, curB, curBReceived);
// now, walk the path backwards
for (int i = (int)fullPath.size() - 1; i >= 0; i--)
{
int64_t curASent, actualCurBReceived;
Asset const& curA = fullPath[i];
if (curA == curB)
{
continue;
}
if (curA.type() != ASSET_TYPE_NATIVE)
{
if (!AccountFrame::loadAccount(getIssuer(curA), db))
{
metrics.NewMeter({"op-path-payment", "failure", "no-issuer"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NO_ISSUER);
innerResult().noIssuer() = curA;
return false;
}
}
OfferExchange oe(delta, ledgerManager);
// curA -> curB
OfferExchange::ConvertResult r = oe.convertWithOffers(
curA, INT64_MAX, curASent, curB, curBReceived, actualCurBReceived,
[this, &metrics](OfferFrame const& o)
{
if (o.getSellerID() == getSourceID())
{
// we are crossing our own offer, potentially invalidating
// mSourceAccount (balance or numSubEntries)
metrics.NewMeter({"op-path-payment", "failure",
"offer-cross-self"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_OFFER_CROSS_SELF);
return OfferExchange::eStop;
}
return OfferExchange::eKeep;
});
switch (r)
{
case OfferExchange::eFilterStop:
return false;
case OfferExchange::eOK:
if (curBReceived == actualCurBReceived)
{
break;
}
// fall through
case OfferExchange::ePartial:
metrics.NewMeter({"op-path-payment", "failure", "too-few-offers"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_TOO_FEW_OFFERS);
return false;
}
assert(curBReceived == actualCurBReceived);
curBReceived = curASent; // next round, we need to send enough
curB = curA;
// add offers that got taken on the way
// insert in front to match the path's order
auto& offers = innerResult().success().offers;
offers.insert(offers.begin(), oe.getOfferTrail().begin(),
oe.getOfferTrail().end());
}
// last step: we've reached the first account in the chain, update its
// balance
int64_t curBSent;
curBSent = curBReceived;
if (curBSent > mPathPayment.sendMax)
{ // make sure not over the max
metrics.NewMeter({"op-path-payment", "failure", "over-send-max"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_OVER_SENDMAX);
return false;
}
if (curB.type() == ASSET_TYPE_NATIVE)
{
int64_t minBalance = mSourceAccount->getMinimumBalance(ledgerManager);
if ((mSourceAccount->getAccount().balance - curBSent) < minBalance)
{ // they don't have enough to send
metrics.NewMeter({"op-path-payment", "failure", "underfunded"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_UNDERFUNDED);
return false;
}
mSourceAccount->getAccount().balance -= curBSent;
mSourceAccount->storeChange(delta, db);
}
else
{
TrustFrame::pointer sourceLineFrame;
if (bypassIssuerCheck)
{
sourceLineFrame =
TrustFrame::loadTrustLine(getSourceID(), curB, db);
}
else
{
auto tlI = TrustFrame::loadTrustLineIssuer(getSourceID(), curB, db);
if (!tlI.second)
{
metrics.NewMeter({"op-path-payment", "failure", "no-issuer"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NO_ISSUER);
innerResult().noIssuer() = curB;
return false;
}
sourceLineFrame = tlI.first;
}
if (!sourceLineFrame)
{
metrics.NewMeter({"op-path-payment", "failure", "src-no-trust"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_SRC_NO_TRUST);
return false;
}
if (!sourceLineFrame->isAuthorized())
{
metrics.NewMeter(
{"op-path-payment", "failure", "src-not-authorized"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_SRC_NOT_AUTHORIZED);
return false;
}
if (!sourceLineFrame->addBalance(-curBSent))
{
metrics.NewMeter({"op-path-payment", "failure", "underfunded"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_UNDERFUNDED);
return false;
}
sourceLineFrame->storeChange(delta, db);
}
metrics.NewMeter({"op-path-payment", "success", "apply"}, "operation")
.Mark();
return true;
}
OfferExchange::CrossOfferResult
OfferExchange::crossOffer(OfferFrame& sellingWheatOffer,
int64_t maxWheatReceived, int64_t& numWheatReceived,
int64_t maxSheepSend, int64_t& numSheepSend)
{
Asset& sheep = sellingWheatOffer.getOffer().buying;
Asset& wheat = sellingWheatOffer.getOffer().selling;
AccountID& accountBID = sellingWheatOffer.getOffer().sellerID;
Database& db = mLedgerManager.getDatabase();
AccountFrame::pointer accountB;
accountB = AccountFrame::loadAccount(accountBID, db);
if (!accountB)
{
throw std::runtime_error(
"invalid database state: offer must have matching account");
}
TrustFrame::pointer wheatLineAccountB;
if (wheat.type() != ASSET_TYPE_NATIVE)
{
wheatLineAccountB = TrustFrame::loadTrustLine(accountBID, wheat, db);
if (!wheatLineAccountB)
{
throw std::runtime_error(
"invalid database state: offer must have matching trust line");
}
}
TrustFrame::pointer sheepLineAccountB;
if (sheep.type() == ASSET_TYPE_NATIVE)
{
numWheatReceived = INT64_MAX;
}
else
{
sheepLineAccountB = TrustFrame::loadTrustLine(accountBID, sheep, db);
if (!sheepLineAccountB)
{
throw std::runtime_error(
"invalid database state: offer must have matching trust line");
}
// compute numWheatReceived based on what the account can receive
int64_t sellerMaxSheep = sheepLineAccountB->getMaxAmountReceive();
if (!bigDivide(numWheatReceived, sellerMaxSheep,
sellingWheatOffer.getOffer().price.d,
sellingWheatOffer.getOffer().price.n))
{
numWheatReceived = INT64_MAX;
}
}
// adjust numWheatReceived with what the seller has
{
int64_t wheatCanSell;
if (wheat.type() == ASSET_TYPE_NATIVE)
{
// can only send above the minimum balance
wheatCanSell = accountB->getBalanceAboveReserve(mLedgerManager);
}
else
{
if (wheatLineAccountB->isAuthorized())
{
wheatCanSell = wheatLineAccountB->getBalance();
}
else
{
wheatCanSell = 0;
}
}
if (numWheatReceived > wheatCanSell)
{
numWheatReceived = wheatCanSell;
}
}
// you can receive the lesser of the amount of wheat offered or
// the amount the guy has
if (numWheatReceived >= sellingWheatOffer.getOffer().amount)
{
numWheatReceived = sellingWheatOffer.getOffer().amount;
}
else
{
// update the offer based on the balance (to determine if it should be
// deleted or not)
// note that we don't need to write into the db at this point as the
// actual update
// is done further down
sellingWheatOffer.getOffer().amount = numWheatReceived;
}
bool reducedOffer = false;
if (numWheatReceived > maxWheatReceived)
{
numWheatReceived = maxWheatReceived;
reducedOffer = true;
}
// this guy can get X wheat to you. How many sheep does that get him?
if (!bigDivide(numSheepSend, numWheatReceived,
sellingWheatOffer.getOffer().price.n,
sellingWheatOffer.getOffer().price.d))
{
numSheepSend = INT64_MAX;
}
if (numSheepSend > maxSheepSend)
{
// reduce the number even more if there is a limit on Sheep
numSheepSend = maxSheepSend;
reducedOffer = true;
}
// bias towards seller (this cannot overflow at this point)
numWheatReceived =
bigDivide(numSheepSend, sellingWheatOffer.getOffer().price.d,
sellingWheatOffer.getOffer().price.n);
bool offerTaken = false;
if (numWheatReceived == 0 || numSheepSend == 0)
{
if (reducedOffer)
{
return eOfferCantConvert;
}
else
{
// force delete the offer as it represents a bogus offer
numWheatReceived = 0;
numSheepSend = 0;
offerTaken = true;
}
}
offerTaken =
offerTaken || sellingWheatOffer.getOffer().amount <= numWheatReceived;
if (offerTaken)
{ // entire offer is taken
sellingWheatOffer.storeDelete(mDelta, db);
accountB->addNumEntries(-1, mLedgerManager);
accountB->storeChange(mDelta, db);
}
else
{
sellingWheatOffer.getOffer().amount -= numWheatReceived;
sellingWheatOffer.storeChange(mDelta, db);
}
// Adjust balances
if (sheep.type() == ASSET_TYPE_NATIVE)
{
accountB->getAccount().balance += numSheepSend;
accountB->storeChange(mDelta, db);
}
else
{
if (!sheepLineAccountB->addBalance(numSheepSend))
{
return eOfferCantConvert;
}
sheepLineAccountB->storeChange(mDelta, db);
}
if (wheat.type() == ASSET_TYPE_NATIVE)
{
accountB->getAccount().balance -= numWheatReceived;
accountB->storeChange(mDelta, db);
}
else
{
if (!wheatLineAccountB->addBalance(-numWheatReceived))
{
return eOfferCantConvert;
}
wheatLineAccountB->storeChange(mDelta, db);
}
mOfferTrail.push_back(
ClaimOfferAtom(accountB->getID(), sellingWheatOffer.getOfferID(), wheat,
numWheatReceived, sheep, numSheepSend));
return offerTaken ? eOfferTaken : eOfferPartial;
}
// you are selling sheep for wheat
// need to check the counter offers selling wheat for sheep
// see if this is modifying an old offer
// see if this offer crosses any existing offers
bool
ManageOfferOpFrame::doApply(medida::MetricsRegistry& metrics,
LedgerDelta& delta, LedgerManager& ledgerManager)
{
Database& db = ledgerManager.getDatabase();
if (!checkOfferValid(metrics, db))
{
return false;
}
Asset const& sheep = mManageOffer.selling;
Asset const& wheat = mManageOffer.buying;
bool creatingNewOffer = false;
uint64_t offerID = mManageOffer.offerID;
if (offerID)
{ // modifying an old offer
mSellSheepOffer = OfferFrame::loadOffer(getSourceID(), offerID, db);
if (mSellSheepOffer)
{
// make sure the currencies are the same
if (!compareAsset(mManageOffer.selling,
mSellSheepOffer->getOffer().selling) ||
!compareAsset(mManageOffer.buying,
mSellSheepOffer->getOffer().buying))
{
metrics.NewMeter({"op-manage-offer", "invalid", "mismatch"},
"operation").Mark();
innerResult().code(MANAGE_OFFER_MISMATCH);
return false;
}
mPassive = mSellSheepOffer->getFlags() & PASSIVE_FLAG;
}
else
{
metrics.NewMeter({"op-manage-offer", "invalid", "not-found"},
"operation").Mark();
innerResult().code(MANAGE_OFFER_NOT_FOUND);
return false;
}
}
else
{ // creating a new Offer
creatingNewOffer = true;
mSellSheepOffer = OfferFrame::from(getSourceID(), mManageOffer);
if (mPassive)
mSellSheepOffer->mEntry.data.offer().flags = PASSIVE_FLAG;
}
int64_t maxSheepSend = mManageOffer.amount;
int64_t maxAmountOfSheepCanSell;
if (sheep.type() == ASSET_TYPE_NATIVE)
{
maxAmountOfSheepCanSell =
mSourceAccount->getBalanceAboveReserve(ledgerManager);
}
else
{
maxAmountOfSheepCanSell = mSheepLineA->getBalance();
}
// the maximum is defined by how much wheat it can receive
int64_t maxWheatCanSell;
if (wheat.type() == ASSET_TYPE_NATIVE)
{
maxWheatCanSell = INT64_MAX;
}
else
{
maxWheatCanSell = mWheatLineA->getMaxAmountReceive();
if (maxWheatCanSell == 0)
{
metrics.NewMeter({"op-manage-offer", "invalid", "line-full"},
"operation").Mark();
innerResult().code(MANAGE_OFFER_LINE_FULL);
return false;
}
}
{
int64_t maxSheepBasedOnWheat;
if (!bigDivide(maxSheepBasedOnWheat, maxWheatCanSell,
mManageOffer.price.d, mManageOffer.price.n))
{
maxSheepBasedOnWheat = INT64_MAX;
}
if (maxAmountOfSheepCanSell > maxSheepBasedOnWheat)
{
maxAmountOfSheepCanSell = maxSheepBasedOnWheat;
}
}
// amount of sheep for sale is the lesser of amount we can sell and amount
// put in the offer
if (maxAmountOfSheepCanSell < maxSheepSend)
{
maxSheepSend = maxAmountOfSheepCanSell;
}
Price sheepPrice = mManageOffer.price;
innerResult().code(MANAGE_OFFER_SUCCESS);
{
soci::transaction sqlTx(db.getSession());
LedgerDelta tempDelta(delta);
int64_t sheepSent, wheatReceived;
OfferExchange oe(tempDelta, ledgerManager);
Price maxWheatPrice(sheepPrice.d, sheepPrice.n);
OfferExchange::ConvertResult r = oe.convertWithOffers(
sheep, maxSheepSend, sheepSent, wheat, maxWheatCanSell,
wheatReceived, [this, maxWheatPrice](OfferFrame const& o)
{
if ((mPassive && (o.getPrice() >= maxWheatPrice)) ||
(o.getPrice() > maxWheatPrice))
{
return OfferExchange::eStop;
}
if (o.getSellerID() == getSourceID())
{
// we are crossing our own offer
innerResult().code(MANAGE_OFFER_CROSS_SELF);
return OfferExchange::eStop;
}
return OfferExchange::eKeep;
});
bool offerIsValid = false;
switch (r)
{
case OfferExchange::eOK:
case OfferExchange::ePartial:
offerIsValid = true;
break;
case OfferExchange::eFilterStop:
if (innerResult().code() != MANAGE_OFFER_SUCCESS)
{
return false;
}
offerIsValid = true;
break;
}
// updates the result with the offers that got taken on the way
for (auto const& oatom : oe.getOfferTrail())
{
innerResult().success().offersClaimed.push_back(oatom);
}
if (wheatReceived > 0)
{
if (wheat.type() == ASSET_TYPE_NATIVE)
{
mSourceAccount->getAccount().balance += wheatReceived;
mSourceAccount->storeChange(delta, db);
}
else
{
TrustFrame::pointer wheatLineSigningAccount;
wheatLineSigningAccount =
TrustFrame::loadTrustLine(getSourceID(), wheat, db);
if (!wheatLineSigningAccount)
{
throw std::runtime_error("invalid database state: must "
"have matching trust line");
}
if (!wheatLineSigningAccount->addBalance(wheatReceived))
{
// this would indicate a bug in OfferExchange
throw std::runtime_error("offer claimed over limit");
}
wheatLineSigningAccount->storeChange(delta, db);
}
if (sheep.type() == ASSET_TYPE_NATIVE)
{
mSourceAccount->getAccount().balance -= sheepSent;
mSourceAccount->storeChange(delta, db);
}
else
{
if (!mSheepLineA->addBalance(-sheepSent))
{
// this would indicate a bug in OfferExchange
throw std::runtime_error("offer sold more than balance");
}
mSheepLineA->storeChange(delta, db);
}
}
// recomputes the amount of sheep for sale
mSellSheepOffer->getOffer().amount = maxSheepSend - sheepSent;
if (offerIsValid && mSellSheepOffer->getOffer().amount > 0)
{ // we still have sheep to sell so leave an offer
if (creatingNewOffer)
{
// make sure we don't allow us to add offers when we don't have
// the minbalance
if (!mSourceAccount->addNumEntries(1, ledgerManager))
{
metrics.NewMeter(
{"op-manage-offer", "invalid", "low reserve"},
"operation").Mark();
innerResult().code(MANAGE_OFFER_LOW_RESERVE);
return false;
}
mSellSheepOffer->mEntry.data.offer().offerID =
tempDelta.getHeaderFrame().generateID();
innerResult().success().offer.effect(MANAGE_OFFER_CREATED);
mSellSheepOffer->storeAdd(tempDelta, db);
mSourceAccount->storeChange(tempDelta, db);
}
else
{
innerResult().success().offer.effect(MANAGE_OFFER_UPDATED);
mSellSheepOffer->storeChange(tempDelta, db);
}
innerResult().success().offer.offer() = mSellSheepOffer->getOffer();
}
else
{
innerResult().success().offer.effect(MANAGE_OFFER_DELETED);
if (!creatingNewOffer)
{
mSellSheepOffer->storeDelete(tempDelta, db);
mSourceAccount->addNumEntries(-1, ledgerManager);
mSourceAccount->storeChange(tempDelta, db);
}
}
sqlTx.commit();
tempDelta.commit();
}
metrics.NewMeter({"op-create-offer", "success", "apply"}, "operation")
.Mark();
return true;
}
bool
AllowTrustOpFrame::doApply(Application& app, LedgerDelta& delta,
LedgerManager& ledgerManager)
{
if (ledgerManager.getCurrentLedgerVersion() > 2)
{
if (mAllowTrust.trustor == getSourceID())
{ // since version 3 it is not
// allowed to use ALLOW_TRUST on
// self
app.getMetrics()
.NewMeter({"op-allow-trust", "failure", "trust-self"},
"operation")
.Mark();
innerResult().code(ALLOW_TRUST_SELF_NOT_ALLOWED);
return false;
}
}
if (!(mSourceAccount->getAccount().flags & AUTH_REQUIRED_FLAG))
{ // this account doesn't require authorization to
// hold credit
app.getMetrics()
.NewMeter({"op-allow-trust", "failure", "not-required"},
"operation")
.Mark();
innerResult().code(ALLOW_TRUST_TRUST_NOT_REQUIRED);
return false;
}
if (!(mSourceAccount->getAccount().flags & AUTH_REVOCABLE_FLAG) &&
!mAllowTrust.authorize)
{
app.getMetrics()
.NewMeter({"op-allow-trust", "failure", "cant-revoke"}, "operation")
.Mark();
innerResult().code(ALLOW_TRUST_CANT_REVOKE);
return false;
}
Asset ci;
ci.type(mAllowTrust.asset.type());
if (mAllowTrust.asset.type() == ASSET_TYPE_CREDIT_ALPHANUM4)
{
ci.alphaNum4().assetCode = mAllowTrust.asset.assetCode4();
ci.alphaNum4().issuer = getSourceID();
}
else if (mAllowTrust.asset.type() == ASSET_TYPE_CREDIT_ALPHANUM12)
{
ci.alphaNum12().assetCode = mAllowTrust.asset.assetCode12();
ci.alphaNum12().issuer = getSourceID();
}
Database& db = ledgerManager.getDatabase();
TrustFrame::pointer trustLine;
trustLine = TrustFrame::loadTrustLine(mAllowTrust.trustor, ci, db, &delta);
if (!trustLine)
{
app.getMetrics()
.NewMeter({"op-allow-trust", "failure", "no-trust-line"},
"operation")
.Mark();
innerResult().code(ALLOW_TRUST_NO_TRUST_LINE);
return false;
}
app.getMetrics()
.NewMeter({"op-allow-trust", "success", "apply"}, "operation")
.Mark();
innerResult().code(ALLOW_TRUST_SUCCESS);
trustLine->setAuthorized(mAllowTrust.authorize);
trustLine->storeChange(delta, db);
return true;
}
bool
PathPaymentOpFrame::doApply(medida::MetricsRegistry& metrics,
LedgerDelta& delta, LedgerManager& ledgerManager)
{
AccountFrame::pointer destination;
Database& db = ledgerManager.getDatabase();
destination = AccountFrame::loadAccount(mPathPayment.destination, db);
if (!destination)
{
metrics.NewMeter({"op-path-payment", "failure", "no-destination"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NO_DESTINATION);
return false;
}
innerResult().code(PATH_PAYMENT_SUCCESS);
// tracks the last amount that was traded
int64_t curBReceived = mPathPayment.destAmount;
Asset curB = mPathPayment.destAsset;
// update balances, walks backwards
// build the full path to the destination, starting with sendAsset
std::vector<Asset> fullPath;
fullPath.emplace_back(mPathPayment.sendAsset);
fullPath.insert(fullPath.end(), mPathPayment.path.begin(),
mPathPayment.path.end());
// update last balance in the chain
{
if (curB.type() == ASSET_TYPE_NATIVE)
{
destination->getAccount().balance += curBReceived;
destination->storeChange(delta, db);
}
else
{
TrustFrame::pointer destLine;
destLine =
TrustFrame::loadTrustLine(destination->getID(), curB, db);
if (!destLine)
{
metrics.NewMeter({"op-path-payment", "failure", "no-trust"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NO_TRUST);
return false;
}
if (!destLine->isAuthorized())
{
metrics.NewMeter(
{"op-path-payment", "failure", "not-authorized"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_NOT_AUTHORIZED);
return false;
}
if (!destLine->addBalance(curBReceived))
{
metrics.NewMeter({"op-path-payment", "failure", "line-full"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_LINE_FULL);
return false;
}
destLine->storeChange(delta, db);
}
innerResult().success().last =
SimplePaymentResult(destination->getID(), curB, curBReceived);
}
// now, walk the path backwards
for (int i = (int)fullPath.size() - 1; i >= 0; i--)
{
int64_t curASent, actualCurBReceived;
Asset const& curA = fullPath[i];
if (curA == curB)
{
continue;
}
OfferExchange oe(delta, ledgerManager);
// curA -> curB
OfferExchange::ConvertResult r =
oe.convertWithOffers(curA, INT64_MAX, curASent, curB, curBReceived,
actualCurBReceived, nullptr);
switch (r)
{
case OfferExchange::eFilterStop:
assert(false); // no filter -> should not happen
break;
case OfferExchange::eOK:
if (curBReceived == actualCurBReceived)
{
break;
}
// fall through
case OfferExchange::ePartial:
metrics.NewMeter({"op-path-payment", "failure", "too-few-offers"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_TOO_FEW_OFFERS);
return false;
}
assert(curBReceived == actualCurBReceived);
curBReceived = curASent; // next round, we need to send enough
curB = curA;
// add offers that got taken on the way
// insert in front to match the path's order
auto& offers = innerResult().success().offers;
offers.insert(offers.begin(), oe.getOfferTrail().begin(),
oe.getOfferTrail().end());
}
// last step: we've reached the first account in the chain, update its
// balance
int64_t curBSent;
curBSent = curBReceived;
if (curBSent > mPathPayment.sendMax)
{ // make sure not over the max
metrics.NewMeter({"op-path-payment", "failure", "over-send-max"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_OVER_SENDMAX);
return false;
}
if (curB.type() == ASSET_TYPE_NATIVE)
{
int64_t minBalance = mSourceAccount->getMinimumBalance(ledgerManager);
if ((mSourceAccount->getAccount().balance - curBSent) < minBalance)
{ // they don't have enough to send
metrics.NewMeter({"op-path-payment", "failure", "underfunded"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_UNDERFUNDED);
return false;
}
mSourceAccount->getAccount().balance -= curBSent;
mSourceAccount->storeChange(delta, db);
}
else
{
AccountFrame::pointer issuer;
if(curB.type()==ASSET_TYPE_CREDIT_ALPHANUM4)
issuer = AccountFrame::loadAccount(curB.alphaNum4().issuer, db);
else if(curB.type()==ASSET_TYPE_CREDIT_ALPHANUM12)
issuer = AccountFrame::loadAccount(curB.alphaNum12().issuer, db);
if (!issuer)
{
metrics.NewMeter({"op-path-payment", "failure", "no-issuer"},
"operation").Mark();
throw std::runtime_error("sendCredit Issuer not found");
}
TrustFrame::pointer sourceLineFrame;
sourceLineFrame = TrustFrame::loadTrustLine(getSourceID(), curB, db);
if (!sourceLineFrame)
{
metrics.NewMeter({"op-path-payment", "failure", "src-no-trust"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_SRC_NO_TRUST);
return false;
}
if (!sourceLineFrame->isAuthorized())
{
metrics.NewMeter(
{"op-path-payment", "failure", "src-not-authorized"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_SRC_NOT_AUTHORIZED);
return false;
}
if (!sourceLineFrame->addBalance(-curBSent))
{
metrics.NewMeter({"op-path-payment", "failure", "underfunded"},
"operation").Mark();
innerResult().code(PATH_PAYMENT_UNDERFUNDED);
return false;
}
sourceLineFrame->storeChange(delta, db);
}
metrics.NewMeter({"op-path-payment", "success", "apply"}, "operation")
.Mark();
return true;
}