Currency
makeCurrency(SecretKey& issuer, std::string const& code)
{
Currency currency;
currency.type(CURRENCY_TYPE_ALPHANUM);
currency.alphaNum().issuer = issuer.getPublicKey();
strToCurrencyCode(currency.alphaNum().currencyCode, code);
return currency;
}
bool
AllowTrustOpFrame::doCheckValid()
{
if (mAllowTrust.currency.type() != CURRENCY_TYPE_ALPHANUM)
{
innerResult().code(ALLOW_TRUST_MALFORMED);
return false;
}
Currency ci;
ci.type(CURRENCY_TYPE_ALPHANUM);
ci.alphaNum().currencyCode = mAllowTrust.currency.currencyCode();
ci.alphaNum().issuer = getSourceID();
if (!isCurrencyValid(ci))
{
innerResult().code(ALLOW_TRUST_MALFORMED);
return false;
}
return true;
}
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;
}
// work backward to determine how much they need to send to get the
// specified amount of currency to the recipient
bool
PaymentOpFrame::sendNoCreate(AccountFrame& destination, LedgerDelta& delta,
LedgerManager& ledgerManager)
{
Database& db = ledgerManager.getDatabase();
bool multi_mode = mPayment.path.size() != 0;
if (multi_mode)
{
innerResult().code(PAYMENT_SUCCESS_MULTI);
}
else
{
innerResult().code(PAYMENT_SUCCESS);
}
// tracks the last amount that was traded
int64_t curBReceived = mPayment.amount;
Currency curB = mPayment.currency;
// update balances, walks backwards
// update last balance in the chain
{
if (curB.type() == CURRENCY_TYPE_NATIVE)
{
destination.getAccount().balance += curBReceived;
destination.storeChange(delta, db);
}
else
{
TrustFrame destLine;
if (!TrustFrame::loadTrustLine(destination.getID(), curB, destLine,
db))
{
innerResult().code(PAYMENT_NO_TRUST);
return false;
}
if (!destLine.isAuthorized())
{
innerResult().code(PAYMENT_NOT_AUTHORIZED);
return false;
}
if (!destLine.addBalance(curBReceived))
{
innerResult().code(PAYMENT_LINE_FULL);
return false;
}
destLine.storeChange(delta, db);
}
if (multi_mode)
{
innerResult().multi().last =
SimplePaymentResult(destination.getID(), curB, curBReceived);
}
}
if (multi_mode)
{
// now, walk the path backwards
for (int i = (int)mPayment.path.size() - 1; i >= 0; i--)
{
int64_t curASent, actualCurBReceived;
Currency const& curA = mPayment.path[i];
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:
innerResult().code(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().multi().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 > mPayment.sendMax)
{ // make sure not over the max
innerResult().code(PAYMENT_OVER_SENDMAX);
return false;
}
if (curB.type() == CURRENCY_TYPE_NATIVE)
{
int64_t minBalance = mSourceAccount->getMinimumBalance(ledgerManager);
if (mSourceAccount->getAccount().balance < (minBalance + curBSent))
{ // they don't have enough to send
innerResult().code(PAYMENT_UNDERFUNDED);
return false;
}
mSourceAccount->getAccount().balance -= curBSent;
mSourceAccount->storeChange(delta, db);
}
else
{
AccountFrame issuer;
if (!AccountFrame::loadAccount(curB.alphaNum().issuer, issuer, db))
{
throw std::runtime_error("sendCredit Issuer not found");
}
TrustFrame sourceLineFrame;
if (!TrustFrame::loadTrustLine(getSourceID(), curB, sourceLineFrame,
db))
{
innerResult().code(PAYMENT_UNDERFUNDED);
return false;
}
if (!sourceLineFrame.addBalance(-curBSent))
{
innerResult().code(PAYMENT_UNDERFUNDED);
return false;
}
sourceLineFrame.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;
Currency curB = mPathPayment.destCurrency;
// update balances, walks backwards
// build the full path to the destination, starting with sendCurrency
std::vector<Currency> fullPath;
fullPath.emplace_back(mPathPayment.sendCurrency);
fullPath.insert(fullPath.end(), mPathPayment.path.begin(),
mPathPayment.path.end());
// update last balance in the chain
{
if (curB.type() == CURRENCY_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;
Currency 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() == CURRENCY_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;
issuer = AccountFrame::loadAccount(curB.alphaNum().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;
}
