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Work in progress on offers and ripple.

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This commit is contained in:
Arthur Britto
2012-07-07 14:34:42 -07:00
parent 5cf06d45a0
commit 4b20162e7f
11 changed files with 447 additions and 77 deletions
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72
src/LedgerIndex.cpp
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@@ -59,55 +59,47 @@ uint256 Ledger::getRippleDirIndex(const uint160& uAccountID)
return s.getSHA512Half();
}
uint160 Ledger::getOfferBase(const uint160& currencyIn, const uint160& accountIn,
const uint160& currencyOut, const uint160& accountOut)
uint256 Ledger::getBookBase(const uint160& uCurrencyIn, const uint160& uAccountIn,
const uint160& uCurrencyOut, const uint160& uAccountOut)
{
bool inNative = currencyIn.isZero();
bool outNative = currencyOut.isZero();
bool bInNative = uCurrencyIn.isZero();
bool bOutNative = uCurrencyOut.isZero();
if (inNative && outNative)
throw std::runtime_error("native to native offer");
assert(!bInNative || !bOutNative); // Stamps to stamps not allowed.
assert(bInNative == !uAccountIn.isZero()); // Make sure issuer is specified as needed.
assert(bOutNative == !uAccountOut.isZero()); // Make sure issuer is specified as needed.
assert(uCurrencyIn != uCurrencyOut || uAccountIn != uAccountOut); // Currencies or accounts must differ.
Serializer s(80);
Serializer s(82);
if (inNative)
{
if (!currencyIn) throw std::runtime_error("native currencies are untied");
s.add32(0); // prevent collisions by ensuring different lengths
}
else
{
if (!!currencyIn) throw std::runtime_error("national currencies must be tied");
s.add160(currencyIn);
s.add160(accountIn);
}
s.add16(spaceBookDir); // 2
s.add160(uCurrencyIn); // 20
s.add160(uCurrencyOut); // 20
s.add160(uAccountIn); // 20
s.add160(uAccountOut); // 20
if (outNative)
{
if (!currencyOut) throw std::runtime_error("native currencies are untied");
}
else
{
if (!!currencyOut) throw std::runtime_error("national currencies must be tied");
s.add160(currencyOut);
s.add160(accountOut);
}
return s.getRIPEMD160();
return getDirIndex(s.getSHA512Half()); // Return with index 0.
}
uint256 Ledger::getOfferIndex(const uint160& offerBase, uint64 rate, int skip)
{ // the node for an offer index
Serializer s;
s.add160(offerBase);
s.add64(rate);
s.add32(skip);
return s.get256(0);
uint256 Ledger::getOfferIndex(const uint160& uAccountID, uint32 uSequence)
{
Serializer s;
s.add16(spaceOffer);
s.add160(uAccountID);
s.add32(uSequence);
return s.getSHA512Half();
}
int Ledger::getOfferSkip(const uint256& offerId)
{ // how far ahead we skip if an index node is full
return *offerId.begin();
uint256 Ledger::getOfferDirIndex(const uint160& uAccountID)
{
Serializer s;
s.add16(spaceOfferDir);
s.add160(uAccountID);
return s.getSHA512Half();
}
// vim:ts=4