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rippled/src/Amount.cpp
Arthur Britto a3fb732e24 Rework offer amount calculation.
2012-07-13 15:28:58 -07:00

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#include <cmath>
#include <iomanip>
#include <algorithm>
#include <boost/lexical_cast.hpp>
#include <boost/test/unit_test.hpp>
#include "Config.h"
#include "SerializedTypes.h"
#include "utils.h"
bool STAmount::currencyFromString(uint160& uDstCurrency, const std::string& sCurrency)
{
bool bSuccess = true;
if (sCurrency.empty() || !sCurrency.compare(SYSTEM_CURRENCY_CODE))
{
uDstCurrency.zero();
}
else if (3 == sCurrency.size())
{
std::vector<unsigned char> vucIso(3);
std::transform(sCurrency.begin(), sCurrency.end(), vucIso.begin(), ::toupper);
// std::string sIso;
// sIso.assign(vucIso.begin(), vucIso.end());
// std::cerr << "currency: " << sIso << std::endl;
Serializer s;
s.addZeros(96/8);
s.addRaw(vucIso);
s.addZeros(16/8);
s.addZeros(24/8);
s.get160(uDstCurrency, 0);
}
else
{
bSuccess = false;
}
return bSuccess;
}
// XXX Broken for custom currencies?
std::string STAmount::getCurrencyHuman() const
{
std::string sCurrency;
if (mIsNative)
{
return SYSTEM_CURRENCY_CODE;
}
else
{
uint160 uReserved = mCurrency;
Serializer s(160/8);
s.add160(mCurrency);
SerializerIterator sit(s);
std::vector<unsigned char> vucZeros = sit.getRaw(96/8);
std::vector<unsigned char> vucIso = sit.getRaw(24/8);
std::vector<unsigned char> vucVersion = sit.getRaw(16/8);
std::vector<unsigned char> vucReserved = sit.getRaw(24/8);
if (!::isZero(vucZeros.begin(), vucZeros.size()))
{
throw std::runtime_error("bad currency: zeros");
}
else if (!::isZero(vucVersion.begin(), vucVersion.size()))
{
throw std::runtime_error("bad currency: version");
}
else if (!::isZero(vucReserved.begin(), vucReserved.size()))
{
throw std::runtime_error("bad currency: reserved");
}
else
{
sCurrency.assign(vucIso.begin(), vucIso.end());
}
}
return sCurrency;
}
// Not meant to be the ultimate parser. For use by RPC which is supposed to be sane and trusted.
// Native has special handling:
// - Integer values are in base units.
// - Float values are in float units.
// - To avoid a mistake float value for native are specified with a "^" in place of a "."
bool STAmount::setValue(const std::string& sAmount, const std::string& sCurrency)
{
if (!currencyFromString(mCurrency, sCurrency))
return false;
mIsNative = !mCurrency;
uint64 uValue;
int iOffset;
size_t uDecimal = sAmount.find_first_of(mIsNative ? "^" : ".");
bool bInteger = uDecimal == std::string::npos;
if (bInteger)
{
try
{
uValue = sAmount.empty() ? 0 : boost::lexical_cast<uint64>(sAmount);
}
catch (...)
{
return false;
}
iOffset = 0;
}
else
{
// Example size decimal size-decimal offset
// ^1 2 0 2 -1
// 123^ 4 3 1 0
// 1^23 4 1 3 -2
iOffset = -(sAmount.size()-uDecimal-1);
// Issolate integer and fraction.
uint64 uInteger = uDecimal ? boost::lexical_cast<uint64>(sAmount.substr(0, uDecimal)) : 0;
uint64 uFraction = iOffset ? boost::lexical_cast<uint64>(sAmount.substr(uDecimal+1)) : 0;
// Scale the integer portion to the same offset as the fraction.
uValue = uInteger;
for (int i=-iOffset; i--;)
uValue *= 10;
// Add in the fraction.
uValue += uFraction;
}
if (mIsNative)
{
if (bInteger)
iOffset = -SYSTEM_CURRENCY_PRECISION;
while (iOffset > -SYSTEM_CURRENCY_PRECISION) {
uValue *= 10;
--iOffset;
}
while (iOffset < -SYSTEM_CURRENCY_PRECISION) {
uValue /= 10;
++iOffset;
}
mValue = uValue;
}
else
{
mValue = uValue;
mOffset = iOffset;
canonicalize();
}
return true;
}
// amount = value * [10 ^ offset]
// representation range is 10^80 - 10^(-80)
// on the wire, high 8 bits are (offset+142), low 56 bits are value
// value is zero if amount is zero, otherwise value is 10^15 to (10^16 - 1) inclusive
void STAmount::canonicalize()
{
if (!mCurrency)
{ // native currency amounts should always have an offset of zero
mIsNative = true;
if (mValue == 0)
{
mOffset = 0;
mIsNegative = false;
return;
}
while (mOffset < 0)
{
mValue /= 10;
++mOffset;
}
while (mOffset > 0)
{
mValue *= 10;
--mOffset;
}
assert(mValue <= cMaxNative);
return;
}
mIsNative = false;
if (mValue == 0)
{
mOffset = -100;
mIsNegative = false;
return;
}
while (mValue < cMinValue)
{
if (mOffset <= cMinOffset)
throw std::runtime_error("value overflow");
mValue *= 10;
if (mValue >= cMaxValue)
throw std::runtime_error("value overflow");
--mOffset;
}
while (mValue > cMaxValue)
{
if (mOffset >= cMaxOffset)
throw std::runtime_error("value underflow");
mValue /= 10;
++mOffset;
}
assert((mValue == 0) || ((mValue >= cMinValue) && (mValue <= cMaxValue)) );
assert((mValue == 0) || ((mOffset >= cMinOffset) && (mOffset <= cMaxOffset)) );
assert((mValue != 0) || (mOffset != -100) );
}
void STAmount::add(Serializer& s) const
{
if (mIsNative)
{
assert(mOffset == 0);
if (!mIsNegative)
s.add64(mValue | cPosNative);
else
s.add64(mValue);
}
else
{
if (isZero())
s.add64(cNotNative);
else if (mIsNegative) // 512 = not native
s.add64(mValue | (static_cast<uint64>(mOffset + 512 + 97) << (64 - 10)));
else // 256 = positive
s.add64(mValue | (static_cast<uint64>(mOffset + 512 + 256 + 97) << (64 - 10)));
s.add160(mCurrency);
}
}
STAmount::STAmount(const char* name, int64 value) : SerializedType(name), mOffset(0), mIsNative(true)
{
if (value >= 0)
{
mIsNegative = false;
mValue = static_cast<uint64>(value);
}
else
{
mIsNegative = true;
mValue = static_cast<uint64>(-value);
}
}
void STAmount::setValue(const STAmount &a)
{
mCurrency = a.mCurrency;
mIssuer = a.mIssuer;
mValue = a.mValue;
mOffset = a.mOffset;
mIsNative = a.mIsNative;
mIsNegative = a.mIsNegative;
}
uint64 STAmount::toUInt64() const
{ // makes them sort easily
if (mValue == 0) return 0x4000000000000000ull;
if (mIsNegative)
return mValue | (static_cast<uint64>(mOffset + 97) << (64 - 10));
return mValue | (static_cast<uint64>(mOffset + 256 + 97) << (64 - 10));
}
STAmount* STAmount::construct(SerializerIterator& sit, const char *name)
{
uint64 value = sit.get64();
if ((value & cNotNative) == 0)
{ // native
if ((value & cPosNative) != 0)
return new STAmount(name, value & ~cPosNative, false); // positive
return new STAmount(name, value, true); // negative
}
uint160 currency = sit.get160();
if (!currency)
throw std::runtime_error("invalid native currency");
int offset = static_cast<int>(value >> (64 - 10)); // 10 bits for the offset, sign and "not native" flag
value &= ~(1023ull << (64-10));
if (value == 0)
{
if (offset != 512)
throw std::runtime_error("invalid currency value");
return new STAmount(name, currency);
}
bool isNegative = (offset & 256) == 0;
offset = (offset & 255) - 97; // center the range
if ((value < cMinValue) || (value > cMaxValue) || (offset < cMinOffset) || (offset > cMaxOffset))
throw std::runtime_error("invalid currency value");
return new STAmount(name, currency, value, offset, isNegative);
}
int64 STAmount::getSNValue() const
{ // signed native value
if (!mIsNative) throw std::runtime_error("not native");
if (mIsNegative) return - static_cast<int64>(mValue);
return static_cast<int64>(mValue);
}
void STAmount::setSNValue(int64 v)
{
if (!mIsNative) throw std::runtime_error("not native");
if (v > 0)
{
mIsNegative = false;
mValue = static_cast<uint64>(v);
}
else
{
mIsNegative = true;
mValue = static_cast<uint64>(-v);
}
}
std::string STAmount::getRaw() const
{ // show raw internal form
if (mValue == 0) return "0";
if (mIsNative)
{
if (mIsNegative) return std::string("-") + boost::lexical_cast<std::string>(mValue);
else return boost::lexical_cast<std::string>(mValue);
}
if (mIsNegative)
return mCurrency.GetHex() + ": -" +
boost::lexical_cast<std::string>(mValue) + "e" + boost::lexical_cast<std::string>(mOffset);
else return mCurrency.GetHex() + ": " +
boost::lexical_cast<std::string>(mValue) + "e" + boost::lexical_cast<std::string>(mOffset);
}
std::string STAmount::getText() const
{ // keep full internal accuracy, but make more human friendly if posible
if (isZero()) return "0";
if (mIsNative)
{
if (mIsNegative)
return std::string("-") + boost::lexical_cast<std::string>(mValue);
else return boost::lexical_cast<std::string>(mValue);
}
if ((mOffset < -25) || (mOffset > -5))
{
if (mIsNegative)
return std::string("-") + boost::lexical_cast<std::string>(mValue) +
"e" + boost::lexical_cast<std::string>(mOffset);
else
return boost::lexical_cast<std::string>(mValue) + "e" + boost::lexical_cast<std::string>(mOffset);
}
std::string val = "000000000000000000000000000";
val += boost::lexical_cast<std::string>(mValue);
val += "00000000000000000000000";
std::string pre = val.substr(0, mOffset + 43);
std::string post = val.substr(mOffset + 43);
size_t s_pre = pre.find_first_not_of('0');
if (s_pre == std::string::npos)
pre="0";
else
pre = pre.substr(s_pre);
size_t s_post = post.find_last_not_of('0');
if (mIsNegative) pre = std::string("-") + pre;
if (s_post == std::string::npos)
return pre;
else
return pre + "." + post.substr(0, s_post+1);
}
bool STAmount::isComparable(const STAmount& t) const
{ // are these two STAmount instances in the same currency
if (mIsNative) return t.mIsNative;
if (t.mIsNative) return false;
return mCurrency == t.mCurrency;
}
bool STAmount::isEquivalent(const SerializedType& t) const
{
const STAmount* v = dynamic_cast<const STAmount*>(&t);
if (!v) return false;
return isComparable(*v) && (mIsNegative == v->mIsNegative) && (mValue == v->mValue) && (mOffset == v->mOffset);
}
void STAmount::throwComparable(const STAmount& t) const
{ // throw an exception if these two STAmount instances are incomparable
if (!isComparable(t))
throw std::runtime_error("amounts are not comparable");
}
bool STAmount::operator==(const STAmount& a) const
{
return isComparable(a) && (mIsNegative == a.mIsNegative) && (mOffset == a.mOffset) && (mValue == a.mValue);
}
bool STAmount::operator!=(const STAmount& a) const
{
return (mOffset != a.mOffset) || (mValue != a.mValue) || (mIsNegative!= a.mIsNegative) || !isComparable(a);
}
bool STAmount::operator<(const STAmount& a) const
{
throwComparable(a);
return toUInt64() < a.toUInt64();
}
bool STAmount::operator>(const STAmount& a) const
{
throwComparable(a);
return toUInt64() > a.toUInt64();
}
bool STAmount::operator<=(const STAmount& a) const
{
throwComparable(a);
return toUInt64() <= a.toUInt64();
}
bool STAmount::operator>=(const STAmount& a) const
{
throwComparable(a);
return toUInt64() >= a.toUInt64();
}
STAmount& STAmount::operator+=(const STAmount& a)
{
*this = *this + a;
return *this;
}
STAmount& STAmount::operator-=(const STAmount& a)
{
*this = *this - a;
return *this;
}
STAmount STAmount::operator-(void) const
{
if (mValue == 0) return *this;
return STAmount(name, mCurrency, mValue, mOffset, mIsNative, !mIsNegative);
}
STAmount& STAmount::operator=(const STAmount& a)
{
mValue = a.mValue;
mOffset = a.mOffset;
mIssuer = a.mIssuer;
mCurrency = a.mCurrency;
mIsNative = a.mIsNative;
mIsNegative = a.mIsNegative;
return *this;
}
STAmount& STAmount::operator=(uint64 v)
{ // does not copy name, does not change currency type
mOffset = 0;
mValue = v;
mIsNegative = false;
if (!mIsNative) canonicalize();
return *this;
}
STAmount& STAmount::operator+=(uint64 v)
{
if (mIsNative)
setSNValue(getSNValue() + static_cast<int64>(v));
else *this += STAmount(mCurrency, v);
return *this;
}
STAmount& STAmount::operator-=(uint64 v)
{
if (mIsNative)
setSNValue(getSNValue() - static_cast<int64>(v));
else *this -= STAmount(mCurrency, v);
return *this;
}
bool STAmount::operator<(uint64 v) const
{
return getSNValue() < static_cast<int64>(v);
}
bool STAmount::operator>(uint64 v) const
{
return getSNValue() > static_cast<int64>(v);
}
bool STAmount::operator<=(uint64 v) const
{
return getSNValue() <= static_cast<int64>(v);
}
bool STAmount::operator>=(uint64 v) const
{
return getSNValue() >= static_cast<int64>(v);
}
STAmount STAmount::operator+(uint64 v) const
{
return STAmount(name, getSNValue() + static_cast<int64>(v));
}
STAmount STAmount::operator-(uint64 v) const
{
return STAmount(name, getSNValue() - static_cast<int64>(v));
}
STAmount::operator double() const
{ // Does not keep the precise value. Not recommended
if (!mValue)
return 0.0;
if (mIsNegative) return -1.0 * static_cast<double>(mValue) * pow(10.0, mOffset);
return static_cast<double>(mValue) * pow(10.0, mOffset);
}
STAmount operator+(const STAmount& v1, const STAmount& v2)
{
if (v1.isZero()) return v2;
if (v2.isZero()) return v1;
v1.throwComparable(v2);
if (v1.mIsNative)
return STAmount(v1.name, v1.getSNValue() + v2.getSNValue());
int ov1 = v1.mOffset, ov2 = v2.mOffset;
int64 vv1 = static_cast<int64>(v1.mValue), vv2 = static_cast<int64>(v2.mValue);
if (v1.mIsNegative) vv1 = -vv1;
if (v2.mIsNegative) vv2 = -vv2;
while (ov1 < ov2)
{
vv1 /= 10;
++ov1;
}
while (ov2 < ov1)
{
vv2 /= 10;
++ov2;
}
// this addition cannot overflow an int64, it can overflow an STAmount and the constructor will throw
int64 fv = vv1 + vv2;
if (fv >= 0)
return STAmount(v1.name, v1.mCurrency, fv, ov1, false);
else
return STAmount(v1.name, v1.mCurrency, -fv, ov1, true);
}
STAmount operator-(const STAmount& v1, const STAmount& v2)
{
if (v2.isZero()) return v1;
v1.throwComparable(v2);
if (v2.mIsNative)
return STAmount(v1.name, v1.getSNValue() - v2.getSNValue());
int ov1 = v1.mOffset, ov2 = v2.mOffset;
int64 vv1 = static_cast<int64>(v1.mValue), vv2 = static_cast<int64>(v2.mValue);
if (v1.mIsNegative) vv1 = -vv1;
if (v2.mIsNegative) vv2 = -vv2;
while (ov1 < ov2)
{
vv1 /= 10;
++ov1;
}
while (ov2 < ov1)
{
vv2 /= 10;
++ov2;
}
// this subtraction cannot overflow an int64, it can overflow an STAmount and the constructor will throw
int64 fv = vv1 - vv2;
if (fv >= 0)
return STAmount(v1.name, v1.mCurrency, fv, ov1, false);
else
return STAmount(v1.name, v1.mCurrency, -fv, ov1, true);
}
STAmount STAmount::divide(const STAmount& num, const STAmount& den, const uint160& currencyOut)
{
if (den.isZero()) throw std::runtime_error("division by zero");
if (num.isZero()) return STAmount(currencyOut);
uint64 numVal = num.mValue, denVal = den.mValue;
int numOffset = num.mOffset, denOffset = den.mOffset;
if (num.mIsNative)
while (numVal < STAmount::cMinValue)
{ // Need to bring into range
numVal *= 10;
--numOffset;
}
if (den.mIsNative)
while (denVal < STAmount::cMinValue)
{
denVal *= 10;
--denOffset;
}
int finOffset = numOffset - denOffset - 16;
if ((finOffset > cMaxOffset) || (finOffset < cMinOffset))
throw std::runtime_error("division produces out of range result");
// Compute (numerator * 10^16) / denominator
CBigNum v;
if ((BN_add_word(&v, numVal) != 1) ||
(BN_mul_word(&v, 10000000000000000ul) != 1) ||
(BN_div_word(&v, denVal) == ((BN_ULONG) -1)))
{
throw std::runtime_error("internal bn error");
}
// 10^15 <= quotient <= 10^17
assert(BN_num_bytes(&v) <= 64);
if (num.mIsNegative != den.mIsNegative)
return -STAmount(currencyOut, v.getulong(), finOffset);
else return STAmount(currencyOut, v.getulong(), finOffset);
}
STAmount STAmount::multiply(const STAmount& v1, const STAmount& v2, const uint160& currencyOut)
{
if (v1.isZero() || v2.isZero())
return STAmount(currencyOut);
if (v1.mIsNative && v2.mIsNative) // FIXME: overflow
return STAmount(v1.name, v1.getSNValue() * v2.getSNValue());
uint64 value1 = v1.mValue, value2 = v2.mValue;
int offset1 = v1.mOffset, offset2 = v2.mOffset;
int finOffset = offset1 + offset2;
if ((finOffset > 80) || (finOffset < 22))
throw std::runtime_error("multiplication produces out of range result");
if (v1.mIsNative)
{
while (value1 < STAmount::cMinValue)
{
value1 *= 10;
--offset1;
}
}
else
{ // round
value1 *= 10;
value1 += 3;
--offset1;
}
if (v2.mIsNative)
{
while (value2 < STAmount::cMinValue)
{
value2 *= 10;
--offset2;
}
}
else
{ // round
value2 *= 10;
value2 += 3;
--offset2;
}
// Compute (numerator*10 * denominator*10) / 10^18 with rounding
CBigNum v;
if ((BN_add_word(&v, value1) != 1) ||
(BN_mul_word(&v, value2) != 1) ||
(BN_div_word(&v, 1000000000000000000ul) == ((BN_ULONG) -1)))
{
throw std::runtime_error("internal bn error");
}
// 10^16 <= product <= 10^18
assert(BN_num_bytes(&v) <= 64);
if (v1.mIsNegative != v2.mIsNegative)
return -STAmount(currencyOut, v.getulong(), offset1 + offset2 + 14);
else return STAmount(currencyOut, v.getulong(), offset1 + offset2 + 14);
}
// Convert an offer into an index amount so they sort by rate.
// A taker will take the best, lowest, rate first.
// (e.g. a taker will prefer pay 1 get 3 over pay 1 get 2.
// --> offerOut: takerGets: How much the offerer is selling to the taker.
// --> offerIn: takerPays: How much the offerer is receiving from the taker.
// <-- uRate: normalize(offerIn/offerOut)
// A lower rate is better for the person taking the order.
// The taker gets more for less with a lower rate.
uint64 STAmount::getRate(const STAmount& offerOut, const STAmount& offerIn)
{
if (offerOut.isZero()) throw std::runtime_error("Worthless offer");
STAmount r = divide(offerIn, offerOut, uint160(1));
assert((r.getExponent() >= -100) && (r.getExponent() <= 155));
uint64 ret = r.getExponent() + 100;
return (ret << (64 - 8)) | r.getMantissa();
}
// Taker gets all taker can pay for with saTakerFunds, limited by saOfferPays and saOfferFunds.
// --> saOfferFunds: Limit for saOfferPays
// --> saTakerFunds: Limit for saOfferGets
// --> saOfferPays: Request : this should be reduced as the offer is fullfilled.
// --> saOfferGets: Request : this should be reduced as the offer is fullfilled.
// --> saTakerPays: Total : Used to know the approximate ratio of the exchange.
// --> saTakerGets: Total : Used to know the approximate ratio of the exchange.
// <-- saTakerPaid: Actual
// <-- saTakerGot: Actual
// <-- bRemove: remove offer it is either fullfilled or unfunded
bool STAmount::applyOffer(
const STAmount& saOfferFunds, const STAmount& saTakerFunds,
const STAmount& saOfferPays, const STAmount& saOfferGets,
const STAmount& saTakerPays, const STAmount& saTakerGets,
STAmount& saTakerPaid, STAmount& saTakerGot)
{
saOfferGets.throwComparable(saTakerPays);
assert(!saOfferFunds.isZero() && !saTakerFunds.isZero()); // Must have funds.
assert(!saOfferGets.isZero() && !saOfferPays.isZero()); // Must not be a null offer.
// Amount offer can pay out, limited by offer and funds.
STAmount saOfferPaysAvailable = saOfferFunds < saOfferPays ? saOfferFunds : saOfferPays;
// Amount offer needs to get to be complete, limited by offer funds.
STAmount saOfferGetsAvailable =
saOfferFunds == saOfferPays
? saOfferGets // Offer was fully funded, avoid shenanigans.
: divide(multiply(saTakerPays, saOfferPaysAvailable, uint160(1)), saTakerGets, saOfferGets.getCurrency());
if (saTakerFunds >= saOfferGetsAvailable)
{
// Taker gets all of offer available.
saTakerPaid = saOfferGetsAvailable; // Taker paid what offer could get.
saTakerGot = saOfferPaysAvailable; // Taker got what offer could pay.
return true; // No left over offer.
}
// Taker only get's a portion of offer.
saTakerPaid = saTakerFunds; // Taker paid all he had.
saTakerGot = divide(multiply(saTakerFunds, saOfferPaysAvailable, uint160(1)), saOfferGetsAvailable, saOfferPays.getCurrency());
return saTakerGot >= saOfferPaysAvailable;
}
STAmount STAmount::getPay(const STAmount& offerOut, const STAmount& offerIn, const STAmount& needed)
{ // Someone wants to get (needed) out of the offer, how much should they pay in?
if (offerOut.isZero())
return STAmount(offerIn.getCurrency());
if (needed >= offerOut)
{
// They need more than offered, pay full amount.
return needed;
}
STAmount ret = divide(multiply(needed, offerIn, uint160(1)), offerOut, offerIn.getCurrency());
return (ret > offerIn) ? offerIn : ret;
}
uint64 STAmount::muldiv(uint64 a, uint64 b, uint64 c)
{ // computes (a*b)/c rounding up - supports values up to 10^18
if (c == 0) throw std::runtime_error("underflow");
if ((a == 0) || (b == 0)) return 0;
CBigNum v;
if ((BN_add_word(&v, a * 10 + 3) != 1) || (BN_mul_word(&v, b * 10 + 3) != 1) ||
(BN_div_word(&v, c) == ((BN_ULONG) -1)) || (BN_div_word(&v, 100) == ((BN_ULONG) -1)))
throw std::runtime_error("muldiv error");
return v.getulong();
}
uint64 STAmount::convertToDisplayAmount(const STAmount& internalAmount, uint64 totalNow, uint64 totalInit)
{ // Convert an internal ledger/account quantity of native currency to a display amount
return muldiv(internalAmount.getNValue(), totalInit, totalNow);
}
STAmount STAmount::convertToInternalAmount(uint64 displayAmount, uint64 totalNow, uint64 totalInit,
const char *name)
{ // Convert a display/request currency amount to an internal amount
return STAmount(name, muldiv(displayAmount, totalNow, totalInit));
}
STAmount STAmount::deserialize(SerializerIterator& it)
{
STAmount *s = construct(it);
STAmount ret(*s);
delete s;
return ret;
}
Json::Value STAmount::getJson(int) const
{
Json::Value elem(Json::objectValue);
elem["value"] = getText();
// This is a hack, many places don't specify a currency. STAmount is used just as a value.
if (!mIsNative)
elem["currency"] = getCurrencyHuman();
return elem;
}
// For unit tests:
static STAmount serdes(const STAmount &s)
{
Serializer ser;
s.add(ser);
SerializerIterator sit(ser);
return STAmount::deserialize(sit);
}
BOOST_AUTO_TEST_SUITE(amount)
BOOST_AUTO_TEST_CASE( setValue_test )
{
STAmount saTmp;
// Check native floats
saTmp.setValue("1^0",""); BOOST_CHECK_MESSAGE(SYSTEM_CURRENCY_PARTS == saTmp.getNValue(), "float integer failed");
saTmp.setValue("0^1",""); BOOST_CHECK_MESSAGE(SYSTEM_CURRENCY_PARTS/10 == saTmp.getNValue(), "float fraction failed");
saTmp.setValue("0^12",""); BOOST_CHECK_MESSAGE(12*SYSTEM_CURRENCY_PARTS/100 == saTmp.getNValue(), "float fraction failed");
saTmp.setValue("1^2",""); BOOST_CHECK_MESSAGE(SYSTEM_CURRENCY_PARTS+(2*SYSTEM_CURRENCY_PARTS/10) == saTmp.getNValue(), "float combined failed");
// Check native integer
saTmp.setValue("1",""); BOOST_CHECK_MESSAGE(1 == saTmp.getNValue(), "integer failed");
}
BOOST_AUTO_TEST_CASE( NativeCurrency_test )
{
STAmount zero, one(1), hundred(100);
if (sizeof(BN_ULONG) < (64 / 8)) BOOST_FAIL("BN too small");
if (serdes(zero) != zero) BOOST_FAIL("STAmount fail");
if (serdes(one) != one) BOOST_FAIL("STAmount fail");
if (serdes(hundred) != hundred) BOOST_FAIL("STAmount fail");
if (!zero.isNative()) BOOST_FAIL("STAmount fail");
if (!hundred.isNative()) BOOST_FAIL("STAmount fail");
if (!zero.isZero()) BOOST_FAIL("STAmount fail");
if (one.isZero()) BOOST_FAIL("STAmount fail");
if (hundred.isZero()) BOOST_FAIL("STAmount fail");
if ((zero < zero)) BOOST_FAIL("STAmount fail");
if (!(zero < one)) BOOST_FAIL("STAmount fail");
if (!(zero < hundred)) BOOST_FAIL("STAmount fail");
if ((one < zero)) BOOST_FAIL("STAmount fail");
if ((one < one)) BOOST_FAIL("STAmount fail");
if (!(one < hundred)) BOOST_FAIL("STAmount fail");
if ((hundred < zero)) BOOST_FAIL("STAmount fail");
if ((hundred < one)) BOOST_FAIL("STAmount fail");
if ((hundred < hundred)) BOOST_FAIL("STAmount fail");
if ((zero > zero)) BOOST_FAIL("STAmount fail");
if ((zero > one)) BOOST_FAIL("STAmount fail");
if ((zero > hundred)) BOOST_FAIL("STAmount fail");
if (!(one > zero)) BOOST_FAIL("STAmount fail");
if ((one > one)) BOOST_FAIL("STAmount fail");
if ((one > hundred)) BOOST_FAIL("STAmount fail");
if (!(hundred > zero)) BOOST_FAIL("STAmount fail");
if (!(hundred > one)) BOOST_FAIL("STAmount fail");
if ((hundred > hundred)) BOOST_FAIL("STAmount fail");
if (!(zero <= zero)) BOOST_FAIL("STAmount fail");
if (!(zero <= one)) BOOST_FAIL("STAmount fail");
if (!(zero <= hundred)) BOOST_FAIL("STAmount fail");
if ((one <= zero)) BOOST_FAIL("STAmount fail");
if (!(one <= one)) BOOST_FAIL("STAmount fail");
if (!(one <= hundred)) BOOST_FAIL("STAmount fail");
if ((hundred <= zero)) BOOST_FAIL("STAmount fail");
if ((hundred <= one)) BOOST_FAIL("STAmount fail");
if (!(hundred <= hundred)) BOOST_FAIL("STAmount fail");
if (!(zero >= zero)) BOOST_FAIL("STAmount fail");
if ((zero >= one)) BOOST_FAIL("STAmount fail");
if ((zero >= hundred)) BOOST_FAIL("STAmount fail");
if (!(one >= zero)) BOOST_FAIL("STAmount fail");
if (!(one >= one)) BOOST_FAIL("STAmount fail");
if ((one >= hundred)) BOOST_FAIL("STAmount fail");
if (!(hundred >= zero)) BOOST_FAIL("STAmount fail");
if (!(hundred >= one)) BOOST_FAIL("STAmount fail");
if (!(hundred >= hundred)) BOOST_FAIL("STAmount fail");
if (!(zero == zero)) BOOST_FAIL("STAmount fail");
if ((zero == one)) BOOST_FAIL("STAmount fail");
if ((zero == hundred)) BOOST_FAIL("STAmount fail");
if ((one == zero)) BOOST_FAIL("STAmount fail");
if (!(one == one)) BOOST_FAIL("STAmount fail");
if ((one == hundred)) BOOST_FAIL("STAmount fail");
if ((hundred == zero)) BOOST_FAIL("STAmount fail");
if ((hundred == one)) BOOST_FAIL("STAmount fail");
if (!(hundred == hundred)) BOOST_FAIL("STAmount fail");
if ((zero != zero)) BOOST_FAIL("STAmount fail");
if (!(zero != one)) BOOST_FAIL("STAmount fail");
if (!(zero != hundred)) BOOST_FAIL("STAmount fail");
if (!(one != zero)) BOOST_FAIL("STAmount fail");
if ((one != one)) BOOST_FAIL("STAmount fail");
if (!(one != hundred)) BOOST_FAIL("STAmount fail");
if (!(hundred != zero)) BOOST_FAIL("STAmount fail");
if (!(hundred != one)) BOOST_FAIL("STAmount fail");
if ((hundred != hundred)) BOOST_FAIL("STAmount fail");
if (STAmount().getText() != "0") BOOST_FAIL("STAmount fail");
if (STAmount(31).getText() != "31") BOOST_FAIL("STAmount fail");
if (STAmount(310).getText() != "310") BOOST_FAIL("STAmount fail");
BOOST_TEST_MESSAGE("Amount NC Complete");
}
BOOST_AUTO_TEST_CASE( CustomCurrency_test )
{
uint160 currency(1);
STAmount zero(currency), one(currency, 1), hundred(currency, 100);
serdes(one).getRaw();
if (serdes(zero) != zero) BOOST_FAIL("STAmount fail");
if (serdes(one) != one) BOOST_FAIL("STAmount fail");
if (serdes(hundred) != hundred) BOOST_FAIL("STAmount fail");
if (zero.isNative()) BOOST_FAIL("STAmount fail");
if (hundred.isNative()) BOOST_FAIL("STAmount fail");
if (!zero.isZero()) BOOST_FAIL("STAmount fail");
if (one.isZero()) BOOST_FAIL("STAmount fail");
if (hundred.isZero()) BOOST_FAIL("STAmount fail");
if ((zero < zero)) BOOST_FAIL("STAmount fail");
if (!(zero < one)) BOOST_FAIL("STAmount fail");
if (!(zero < hundred)) BOOST_FAIL("STAmount fail");
if ((one < zero)) BOOST_FAIL("STAmount fail");
if ((one < one)) BOOST_FAIL("STAmount fail");
if (!(one < hundred)) BOOST_FAIL("STAmount fail");
if ((hundred < zero)) BOOST_FAIL("STAmount fail");
if ((hundred < one)) BOOST_FAIL("STAmount fail");
if ((hundred < hundred)) BOOST_FAIL("STAmount fail");
if ((zero > zero)) BOOST_FAIL("STAmount fail");
if ((zero > one)) BOOST_FAIL("STAmount fail");
if ((zero > hundred)) BOOST_FAIL("STAmount fail");
if (!(one > zero)) BOOST_FAIL("STAmount fail");
if ((one > one)) BOOST_FAIL("STAmount fail");
if ((one > hundred)) BOOST_FAIL("STAmount fail");
if (!(hundred > zero)) BOOST_FAIL("STAmount fail");
if (!(hundred > one)) BOOST_FAIL("STAmount fail");
if ((hundred > hundred)) BOOST_FAIL("STAmount fail");
if (!(zero <= zero)) BOOST_FAIL("STAmount fail");
if (!(zero <= one)) BOOST_FAIL("STAmount fail");
if (!(zero <= hundred)) BOOST_FAIL("STAmount fail");
if ((one <= zero)) BOOST_FAIL("STAmount fail");
if (!(one <= one)) BOOST_FAIL("STAmount fail");
if (!(one <= hundred)) BOOST_FAIL("STAmount fail");
if ((hundred <= zero)) BOOST_FAIL("STAmount fail");
if ((hundred <= one)) BOOST_FAIL("STAmount fail");
if (!(hundred <= hundred)) BOOST_FAIL("STAmount fail");
if (!(zero >= zero)) BOOST_FAIL("STAmount fail");
if ((zero >= one)) BOOST_FAIL("STAmount fail");
if ((zero >= hundred)) BOOST_FAIL("STAmount fail");
if (!(one >= zero)) BOOST_FAIL("STAmount fail");
if (!(one >= one)) BOOST_FAIL("STAmount fail");
if ((one >= hundred)) BOOST_FAIL("STAmount fail");
if (!(hundred >= zero)) BOOST_FAIL("STAmount fail");
if (!(hundred >= one)) BOOST_FAIL("STAmount fail");
if (!(hundred >= hundred)) BOOST_FAIL("STAmount fail");
if (!(zero == zero)) BOOST_FAIL("STAmount fail");
if ((zero == one)) BOOST_FAIL("STAmount fail");
if ((zero == hundred)) BOOST_FAIL("STAmount fail");
if ((one == zero)) BOOST_FAIL("STAmount fail");
if (!(one == one)) BOOST_FAIL("STAmount fail");
if ((one == hundred)) BOOST_FAIL("STAmount fail");
if ((hundred == zero)) BOOST_FAIL("STAmount fail");
if ((hundred == one)) BOOST_FAIL("STAmount fail");
if (!(hundred == hundred)) BOOST_FAIL("STAmount fail");
if ((zero != zero)) BOOST_FAIL("STAmount fail");
if (!(zero != one)) BOOST_FAIL("STAmount fail");
if (!(zero != hundred)) BOOST_FAIL("STAmount fail");
if (!(one != zero)) BOOST_FAIL("STAmount fail");
if ((one != one)) BOOST_FAIL("STAmount fail");
if (!(one != hundred)) BOOST_FAIL("STAmount fail");
if (!(hundred != zero)) BOOST_FAIL("STAmount fail");
if (!(hundred != one)) BOOST_FAIL("STAmount fail");
if ((hundred != hundred)) BOOST_FAIL("STAmount fail");
if (STAmount(currency).getText() != "0") BOOST_FAIL("STAmount fail");
if (STAmount(currency,31).getText() != "31") BOOST_FAIL("STAmount fail");
if (STAmount(currency,31,1).getText() != "310") BOOST_FAIL("STAmount fail");
if (STAmount(currency,31,-1).getText() != "3.1") BOOST_FAIL("STAmount fail");
if (STAmount(currency,31,-2).getText() != "0.31") BOOST_FAIL("STAmount fail");
BOOST_TEST_MESSAGE("Amount CC Complete");
}
BOOST_AUTO_TEST_CASE( CurrencyMulDivTests )
{
// Test currency multiplication and division operations such as
// convertToDisplayAmount, convertToInternalAmount, getRate, getClaimed, and getNeeded
uint160 c(1);
if (STAmount::getRate(STAmount(1), STAmount(10)) != (((100ul-14)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
if (STAmount::getRate(STAmount(10), STAmount(1)) != (((100ul-16)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
if (STAmount::getRate(STAmount(c, 1), STAmount(c, 10)) != (((100ul-14)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
if (STAmount::getRate(STAmount(c, 10), STAmount(c, 1)) != (((100ul-16)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
if (STAmount::getRate(STAmount(c, 1), STAmount(10)) != (((100ul-14)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
if (STAmount::getRate(STAmount(c, 10), STAmount(1)) != (((100ul-16)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
if (STAmount::getRate(STAmount(1), STAmount(c, 10)) != (((100ul-14)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
if (STAmount::getRate(STAmount(10), STAmount(c, 1)) != (((100ul-16)<<(64-8))|1000000000000000ul))
BOOST_FAIL("STAmount getrate fail");
}
BOOST_AUTO_TEST_SUITE_END()
// vim:ts=4
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