package io.bitsquare.gui.main.offer.createoffer.monetary;
import com.google.common.math.LongMath;
import org.bitcoinj.core.Monetary;
import org.bitcoinj.utils.MonetaryFormat;
import org.jetbrains.annotations.NotNull;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Serializable;
import java.math.BigDecimal;
import static com.google.common.base.Preconditions.checkArgument;
/**
* Cloned from Fiat class and altered SMALLEST_UNIT_EXPONENT as Fiat is final.
* <p>
* Represents a monetary fiat value. It was decided to not fold this into {@link org.bitcoinj.core.Coin} because of type
* safety. Volume values always come with an attached currency code.
* <p>
* This class is immutable.
*/
public final class Altcoin implements Monetary, Comparable<Altcoin>, Serializable {
private static final Logger log = LoggerFactory.getLogger(Altcoin.class);
/**
* The absolute value of exponent of the value of a "smallest unit" in scientific notation. We picked 4 rather than
* 2, because in financial applications it's common to use sub-cent precision.
*/
public static final int SMALLEST_UNIT_EXPONENT = 8;
/**
* The number of smallest units of this monetary value.
*/
public final long value;
public final String currencyCode;
private Altcoin(final String currencyCode, final long value) {
this.value = value;
this.currencyCode = currencyCode;
}
public static Altcoin valueOf(final String currencyCode, final long value) {
return new Altcoin(currencyCode, value);
}
@Override
public int smallestUnitExponent() {
return SMALLEST_UNIT_EXPONENT;
}
/**
* Returns the number of "smallest units" of this monetary value.
*/
@Override
public long getValue() {
return value;
}
public String getCurrencyCode() {
return currencyCode;
}
/**
* Parses an amount expressed in the way humans are used to.
* <p>
* <p>
* This takes string in a format understood by {@link BigDecimal#BigDecimal(String)}, for example "0", "1", "0.10",
* "1.23E3", "1234.5E-5".
*
* @throws IllegalArgumentException if you try to specify fractional satoshis, or a value out of range.
*/
public static Altcoin parseAltcoin(final String currencyCode, final String str) {
try {
long val = new BigDecimal(str).movePointRight(SMALLEST_UNIT_EXPONENT)
.toBigIntegerExact().longValue();
return Altcoin.valueOf(currencyCode, val);
} catch (ArithmeticException e) {
throw new IllegalArgumentException(e);
}
}
public Altcoin add(final Altcoin value) {
checkArgument(value.currencyCode.equals(currencyCode));
return new Altcoin(currencyCode, LongMath.checkedAdd(this.value, value.value));
}
public Altcoin subtract(final Altcoin value) {
checkArgument(value.currencyCode.equals(currencyCode));
return new Altcoin(currencyCode, LongMath.checkedSubtract(this.value, value.value));
}
public Altcoin multiply(final long factor) {
return new Altcoin(currencyCode, LongMath.checkedMultiply(this.value, factor));
}
public Altcoin divide(final long divisor) {
return new Altcoin(currencyCode, this.value / divisor);
}
public Altcoin[] divideAndRemainder(final long divisor) {
return new Altcoin[]{new Altcoin(currencyCode, this.value / divisor), new Altcoin(currencyCode, this.value % divisor)};
}
public long divide(final Altcoin divisor) {
checkArgument(divisor.currencyCode.equals(currencyCode));
return this.value / divisor.value;
}
/**
* Returns true if and only if this instance represents a monetary value greater than zero, otherwise false.
*/
public boolean isPositive() {
return signum() == 1;
}
/**
* Returns true if and only if this instance represents a monetary value less than zero, otherwise false.
*/
public boolean isNegative() {
return signum() == -1;
}
/**
* Returns true if and only if this instance represents zero monetary value, otherwise false.
*/
public boolean isZero() {
return signum() == 0;
}
/**
* Returns true if the monetary value represented by this instance is greater than that of the given other Coin,
* otherwise false.
*/
public boolean isGreaterThan(Altcoin other) {
return compareTo(other) > 0;
}
/**
* Returns true if the monetary value represented by this instance is less than that of the given other Coin,
* otherwise false.
*/
public boolean isLessThan(Altcoin other) {
return compareTo(other) < 0;
}
@Override
public int signum() {
if (this.value == 0)
return 0;
return this.value < 0 ? -1 : 1;
}
public Altcoin negate() {
return new Altcoin(currencyCode, -this.value);
}
/**
* Returns the number of satoshis of this monetary value. It's deprecated in favour of accessing {@link #value}
* directly.
*/
public long longValue() {
return this.value;
}
private static final MonetaryFormat FRIENDLY_FORMAT = MonetaryFormat.FIAT.postfixCode();
/**
* Returns the value as a 0.12 type string. More digits after the decimal place will be used if necessary, but two
* will always be present.
*/
public String toFriendlyString() {
return FRIENDLY_FORMAT.code(0, currencyCode).format(this).toString();
}
private static final MonetaryFormat PLAIN_FORMAT = MonetaryFormat.FIAT.minDecimals(0).repeatOptionalDecimals(1, 8).noCode();
/**
* <p>
* Returns the value as a plain string denominated in BTC. The result is unformatted with no trailing zeroes. For
* instance, a value of 150000 satoshis gives an output string of "0.0015" BTC
* </p>
*/
public String toPlainString() {
return PLAIN_FORMAT.format(this).toString();
}
@Override
public String toString() {
return Long.toString(value);
}
@Override
public boolean equals(final Object o) {
if (o == this)
return true;
if (o == null || o.getClass() != getClass())
return false;
final Altcoin other = (Altcoin) o;
if (this.value != other.value)
return false;
if (!this.currencyCode.equals(other.currencyCode))
return false;
return true;
}
@Override
public int hashCode() {
return (int) this.value + 37 * this.currencyCode.hashCode();
}
@Override
public int compareTo(@NotNull final Altcoin other) {
if (!this.currencyCode.equals(other.currencyCode))
return this.currencyCode.compareTo(other.currencyCode);
if (this.value != other.value)
return this.value > other.value ? 1 : -1;
return 0;
}
}