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Add a function to check if a currency/issuer/currency/issuer set

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defines a valid order book.
This commit is contained in:
JoelKatz
2013-03-12 09:42:38 -07:00
parent 7285f98972
commit 80233579f1
2 changed files with 25 additions and 0 deletions
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22
src/cpp/ripple/Ledger.cpp
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@@ -1302,6 +1302,28 @@ std::vector< std::pair<uint32, uint256> > Ledger::getLedgerHashes()
return ret;
}
bool Ledger::isValidBook(const uint160& uTakerPaysCurrency, const uint160& uTakerPaysIssuerID,
const uint160& uTakerGetsCurrency, const uint160& uTakerGetsIssuerID)
{
if (uTakerPaysCurrency.isZero())
{ // XRP in
if (uTakerPaysIssuerID.isNonZero()) // XRP cannot have an issuer
return false;
if (uTakerGetsCurrency.isZero()) // XRP to XRP not allowed
return false;
if (uTakerGetsIssuerID.isZero()) // non-XRP must have issuer
return false;
return true;
}
// non-XRP in
if (uTakerPaysIssuerID.isZero()) // non-XRP must have issuer
return false;
if (uTakerGetsCurrency.isZero() != uTakerGetsIssuerID.isZero())
return false; // XRP must have issuer, non-XRP must not
return true;
}
uint256 Ledger::getBookBase(const uint160& uTakerPaysCurrency, const uint160& uTakerPaysIssuerID,
const uint160& uTakerGetsCurrency, const uint160& uTakerGetsIssuerID)
{