com.hedera.hashgraph.sdk.Hbar Maven / Gradle / Ivy
Show all versions of sdk-jdk7 Show documentation
/*-
*
* Hedera Java SDK
*
* Copyright (C) 2020 - 2022 Hedera Hashgraph, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.hedera.hashgraph.sdk;
import com.google.common.base.Splitter;
import javax.annotation.Nullable;
import java.math.BigDecimal;
import java.math.MathContext;
import java.util.Objects;
import java.util.regex.Pattern;
/**
* Represents a quantity of hbar.
*
* Implemented as a wrapper class to force handling of units. Direct interfacing with Hedera accepts amounts
* in tinybars however the nominal unit is hbar.
*/
public final class Hbar implements Comparable {
/**
* A constant value of zero hbars.
*/
public static final Hbar ZERO = Hbar.fromTinybars(0);
/**
* A constant value of the maximum number of hbars.
*/
public static final Hbar MAX = Hbar.from(50_000_000_000L);
/**
* A constant value of the minimum number of hbars.
*/
public static final Hbar MIN = Hbar.from(-50_000_000_000L);
private static final Pattern FROM_STRING_PATTERN = Pattern.compile("^((?:\\+|\\-)?\\d+(?:\\.\\d+)?)(\\ (tℏ|μℏ|mℏ|ℏ|kℏ|Mℏ|Gℏ))?$");
private final long valueInTinybar;
/**
* Constructs a new Hbar of the specified value.
*
* @param amount The amount of Hbar
*/
public Hbar(long amount) {
this(amount, HbarUnit.HBAR);
}
/**
* Constructs a new hbar of the specified value in the specified unit.
* {@link com.hedera.hashgraph.sdk.HbarUnit}
*
* @param amount the amount
* @param unit the unit for amount
*/
Hbar(long amount, HbarUnit unit) {
valueInTinybar = amount * unit.tinybar;
}
/**
* Constructs a new Hbar of the specified, possibly fractional value.
*
* The equivalent amount in tinybar must be an integer and fit in a {@code long} (64-bit signed integer).
*
* E.g., {@code 1.23456789} is a valid amount of hbar but {@code 0.123456789} is not.
*
* @param amount The amount of Hbar
*/
public Hbar(BigDecimal amount) {
this(amount, HbarUnit.HBAR);
}
/**
* Constructs a new hbar of the specified value in the specified unit.
* {@link com.hedera.hashgraph.sdk.HbarUnit}
*
* @param amount the amount
* @param unit the unit for amount
*/
Hbar(BigDecimal amount, HbarUnit unit) {
var tinybars = amount.multiply(BigDecimal.valueOf(unit.tinybar));
if (tinybars.doubleValue() % 1 != 0) {
throw new IllegalArgumentException("Amount and Unit combination results in a fractional value for tinybar. Ensure tinybar value is a whole number.");
}
valueInTinybar = tinybars.longValue();
}
private static HbarUnit getUnit(String symbolString) {
for (var unit : HbarUnit.values()) {
if (unit.getSymbol().equals(symbolString)) {
return unit;
}
}
throw new IllegalArgumentException("Attempted to convert string to Hbar, but unit symbol \"" + symbolString + "\" was not recognized");
}
/**
* Converts the provided string into an amount of hbars.
*
* @param text The string representing the amount of Hbar
* @return {@link com.hedera.hashgraph.sdk.Hbar}
*/
public static Hbar fromString(CharSequence text) {
var matcher = FROM_STRING_PATTERN.matcher(text);
if (!matcher.matches()) {
throw new IllegalArgumentException("Attempted to convert string to Hbar, but \"" + text + "\" was not correctly formatted");
}
var parts = Splitter.on(' ').splitToList(text.toString());
return new Hbar(new BigDecimal(parts.get(0)), parts.size() == 2 ? getUnit(parts.get(1)) : HbarUnit.HBAR);
}
/**
* Converts the provided string into an amount of hbars.
*
* @param text The string representing the amount of set units
* @param unit The unit to convert from to Hbar
* @return {@link com.hedera.hashgraph.sdk.Hbar}
*/
public static Hbar fromString(CharSequence text, HbarUnit unit) {
return new Hbar(new BigDecimal(text.toString()), unit);
}
/**
* Returns an Hbar whose value is equal to the specified long.
*
* @param hbars The value of Hbar
* @return {@link com.hedera.hashgraph.sdk.Hbar}
*/
public static Hbar from(long hbars) {
return new Hbar(hbars, HbarUnit.HBAR);
}
/**
* Returns an Hbar representing the value in the given units.
*
* @param amount The long representing the amount of set units
* @param unit The unit to convert from to Hbar
* @return {@link com.hedera.hashgraph.sdk.Hbar}
*/
public static Hbar from(long amount, HbarUnit unit) {
return new Hbar(amount, unit);
}
/**
* Returns an Hbar whose value is equal to the specified long.
*
* @param hbars The BigDecimal representing the amount of Hbar
* @return {@link com.hedera.hashgraph.sdk.Hbar}
*/
public static Hbar from(BigDecimal hbars) {
return new Hbar(hbars, HbarUnit.HBAR);
}
/**
* Returns an Hbar representing the value in the given units.
*
* @param amount The BigDecimal representing the amount of set units
* @param unit The unit to convert from to Hbar
* @return {@link com.hedera.hashgraph.sdk.Hbar}
*/
public static Hbar from(BigDecimal amount, HbarUnit unit) {
return new Hbar(amount, unit);
}
/**
* Returns an Hbar converted from the specified number of tinybars.
*
* @param tinybars The long representing the amount of tinybar
* @return {@link com.hedera.hashgraph.sdk.Hbar}
*/
public static Hbar fromTinybars(long tinybars) {
return new Hbar(tinybars, HbarUnit.TINYBAR);
}
/**
* Convert this hbar value to a different unit.
*
* @param unit The unit to convert to from Hbar
* @return BigDecimal
*/
public BigDecimal to(HbarUnit unit) {
return BigDecimal.valueOf(valueInTinybar).divide(BigDecimal.valueOf(unit.tinybar), MathContext.UNLIMITED);
}
/**
* Convert this hbar value to Tinybars.
*
* @return long
*/
public long toTinybars() {
return valueInTinybar;
}
/**
* Returns the number of Hbars.
*
* @return BigDecimal
*/
public BigDecimal getValue() {
return to(HbarUnit.HBAR);
}
/**
* Returns a Hbar whose value is {@code -this}.
*
* @return Hbar
*/
public Hbar negated() {
return Hbar.fromTinybars(-valueInTinybar);
}
@Override
public String toString() {
if (valueInTinybar < 10_000 && valueInTinybar > -10_000) {
return Long.toString(this.valueInTinybar) + " " + HbarUnit.TINYBAR.getSymbol();
}
return to(HbarUnit.HBAR).toString() + " " + HbarUnit.HBAR.getSymbol();
}
/**
* Convert hbar to string representation in specified units.
*
* @param unit the desired unit
* @return the string representation
*/
public String toString(HbarUnit unit) {
return to(unit).toString();
}
@Override
public boolean equals( Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Hbar hbar = (Hbar) o;
return valueInTinybar == hbar.valueInTinybar;
}
@Override
public int hashCode() {
return Objects.hash(valueInTinybar);
}
@Override
public int compareTo(Hbar o) {
return Long.compare(valueInTinybar, o.valueInTinybar);
}
}