diff --git a/src/main/kotlin/com/cubetiqs/money/Money.kt b/src/main/kotlin/com/cubetiqs/money/Money.kt
index 380ff38..3377617 100644
--- a/src/main/kotlin/com/cubetiqs/money/Money.kt
+++ b/src/main/kotlin/com/cubetiqs/money/Money.kt
@@ -6,23 +6,23 @@ open class Money(
 ) : StdMoney, StdMoney.Operator<Money>, StdMoney.ExchangeOperator {
     //////////////////// - PROPERTIES - ////////////////////
 
-    override fun getMoneyValue(): Double {
+    override fun getValue(): Double {
         return this.value
     }
 
     // not imply with exchange rate yet
     override fun StdMoney.getExchangedTo(currency: StdMoney.Currency): Double {
-        return MoneyExchangeUtils.exchange(this, currency).getMoneyValue()
+        return MoneyExchangeUtils.exchange(this, currency).getValue()
     }
 
-    override fun getMoneyCurrency(): StdMoney.Currency {
+    override fun getCurrency(): StdMoney.Currency {
         return this.currency
     }
 
     //////////////////// - GENERIC - ////////////////////
 
     override fun toString(): String {
-        return "Money(value=${getMoneyValue()}, currency='${getMoneyCurrency().getCurrency()}')"
+        return "Money(value=${getValue()}, currency='${getCurrency().getCurrency()}')"
     }
 
     override fun inc(): Money = apply {
@@ -49,7 +49,7 @@ open class Money(
     }
 
     override fun multiply(other: StdMoney): Money {
-        val temp = this.value * other.getExchangedTo(this.getMoneyCurrency())
+        val temp = this.value * other.getExchangedTo(this.getCurrency())
         return Money(value = temp, currency = this.currency)
     }
 
@@ -66,7 +66,7 @@ open class Money(
     }
 
     override fun multiplyAssign(other: StdMoney): Money = apply {
-        this.value = this.value * other.getExchangedTo(this.getMoneyCurrency())
+        this.value = this.value * other.getExchangedTo(this.getCurrency())
     }
 
     companion object {
@@ -91,7 +91,7 @@ open class Money(
         }
 
         fun from(money: StdMoney): Money {
-            return create(value = money.getMoneyValue(), currency = money.getMoneyCurrency())
+            return create(value = money.getValue(), currency = money.getCurrency())
         }
     }
 }
diff --git a/src/main/kotlin/com/cubetiqs/money/MoneyConfig.kt b/src/main/kotlin/com/cubetiqs/money/MoneyConfig.kt
index 8b68f19..3266288 100644
--- a/src/main/kotlin/com/cubetiqs/money/MoneyConfig.kt
+++ b/src/main/kotlin/com/cubetiqs/money/MoneyConfig.kt
@@ -94,7 +94,7 @@ object MoneyConfig {
      *  "...": ...
      * }
      */
-    fun fromJson(configJson: String, clearAllStates: Boolean = false) {
+    fun fromJsonRates(configJson: String, clearAllStates: Boolean = false) {
         val transformValues = configJson
             .removePrefix("{")
             .removeSuffix("}")
diff --git a/src/main/kotlin/com/cubetiqs/money/MoneyExchangeUtils.kt b/src/main/kotlin/com/cubetiqs/money/MoneyExchangeUtils.kt
index fe9f2a5..19a7ceb 100644
--- a/src/main/kotlin/com/cubetiqs/money/MoneyExchangeUtils.kt
+++ b/src/main/kotlin/com/cubetiqs/money/MoneyExchangeUtils.kt
@@ -2,9 +2,9 @@ package com.cubetiqs.money
 
 object MoneyExchangeUtils {
     fun exchange(exchangeFrom: StdMoney, exchangeToCurrency: StdMoney.Currency): StdMoney {
-        val rateFrom = MoneyConfig.getRate(exchangeFrom.getMoneyCurrency())
+        val rateFrom = MoneyConfig.getRate(exchangeFrom.getCurrency())
         val rateTo = MoneyConfig.getRate(exchangeToCurrency)
-        return Money(value = computeRate(rateFrom, rateTo, amountFrom = exchangeFrom.getMoneyValue()), currency = exchangeToCurrency)
+        return Money(value = computeRate(rateFrom, rateTo, amountFrom = exchangeFrom.getValue()), currency = exchangeToCurrency)
     }
 
     private fun computeRate(rateFrom: Double, rateTo: Double, baseRate: Double = 1.0, amountFrom: Double = 1.0): Double {
diff --git a/src/main/kotlin/com/cubetiqs/money/MoneyExtension.kt b/src/main/kotlin/com/cubetiqs/money/MoneyExtension.kt
index e82a0e6..32d343f 100644
--- a/src/main/kotlin/com/cubetiqs/money/MoneyExtension.kt
+++ b/src/main/kotlin/com/cubetiqs/money/MoneyExtension.kt
@@ -16,51 +16,51 @@ infix fun StdMoney.divideWith(other: StdMoney): StdMoney = this / other
 infix fun StdMoney.multiplyWith(other: StdMoney): StdMoney = this * other
 
 infix fun StdMoney.plusOf(value: Number): StdMoney = object : StdMoney {
-    override fun getMoneyCurrency(): StdMoney.Currency {
-        return this@plusOf.getMoneyCurrency()
+    override fun getCurrency(): StdMoney.Currency {
+        return this@plusOf.getCurrency()
     }
 
-    override fun getMoneyValue(): Double {
-        return this@plusOf.getMoneyValue() + value.toDouble()
+    override fun getValue(): Double {
+        return this@plusOf.getValue() + value.toDouble()
     }
 }
 
 infix fun StdMoney.minusOf(value: Number): StdMoney = object : StdMoney {
-    override fun getMoneyCurrency(): StdMoney.Currency {
-        return this@minusOf.getMoneyCurrency()
+    override fun getCurrency(): StdMoney.Currency {
+        return this@minusOf.getCurrency()
     }
 
-    override fun getMoneyValue(): Double {
-        return this@minusOf.getMoneyValue() - value.toDouble()
+    override fun getValue(): Double {
+        return this@minusOf.getValue() - value.toDouble()
     }
 }
 
 infix fun StdMoney.divideOf(value: Number): StdMoney = object : StdMoney {
-    override fun getMoneyCurrency(): StdMoney.Currency {
-        return this@divideOf.getMoneyCurrency()
+    override fun getCurrency(): StdMoney.Currency {
+        return this@divideOf.getCurrency()
     }
 
-    override fun getMoneyValue(): Double {
-        return this@divideOf.getMoneyValue() / value.toDouble()
+    override fun getValue(): Double {
+        return this@divideOf.getValue() / value.toDouble()
     }
 }
 
 infix fun StdMoney.multiplyOf(value: Number): StdMoney = object : StdMoney {
-    override fun getMoneyCurrency(): StdMoney.Currency {
-        return this@multiplyOf.getMoneyCurrency()
+    override fun getCurrency(): StdMoney.Currency {
+        return this@multiplyOf.getCurrency()
     }
 
-    override fun getMoneyValue(): Double {
-        return this@multiplyOf.getMoneyValue() * value.toDouble()
+    override fun getValue(): Double {
+        return this@multiplyOf.getValue() * value.toDouble()
     }
 }
 
 infix fun Number.withCurrency(currency: StdMoney.Currency): StdMoney = object : StdMoney {
-    override fun getMoneyCurrency(): StdMoney.Currency {
+    override fun getCurrency(): StdMoney.Currency {
         return currency
     }
 
-    override fun getMoneyValue(): Double {
+    override fun getValue(): Double {
         return this@withCurrency.toDouble()
     }
 }
@@ -72,8 +72,8 @@ infix fun Number.withCurrency(currency: String): StdMoney = this withCurrency ob
 }
 
 // toString function for StdMoney interface
-fun StdMoney.asString(): String = "StdMoney(value=${getMoneyValue()}, currency=${getMoneyCurrency().getCurrency()})"
-fun StdMoney.asMoneyString(): String = "${getMoneyValue()}:${getMoneyCurrency().getCurrency()}"
+fun StdMoney.asString(): String = "StdMoney(value=${getValue()}, currency=${getCurrency().getCurrency()})"
+fun StdMoney.asMoneyString(): String = "${getValue()}:${getCurrency().getCurrency()}"
 fun String?.fromStringToMoney(): StdMoney {
     val values = this?.split(":")
     if (values.isNullOrEmpty()) {
@@ -84,18 +84,18 @@ fun String?.fromStringToMoney(): StdMoney {
     val value = values.lastOrNull()?.toDouble() ?: 0.0
 
     return object : StdMoney {
-        override fun getMoneyCurrency(): StdMoney.Currency {
+        override fun getCurrency(): StdMoney.Currency {
             return currency
         }
 
-        override fun getMoneyValue(): Double {
+        override fun getValue(): Double {
             return value
         }
     }
 }
 
 fun StdMoney.isMatchedCurrency(currency: StdMoney.Currency) =
-    this.getMoneyCurrency().getCurrency().equals(currency.getCurrency(), ignoreCase = true)
+    this.getCurrency().getCurrency().equals(currency.getCurrency(), ignoreCase = true)
 
 inline fun buildMoneyConfigProperties(
     builderAction: MoneyConfig.MoneyConfigProperties.MoneyConfigPropertiesBuilder.() -> Unit
diff --git a/src/main/kotlin/com/cubetiqs/money/MoneyObject.kt b/src/main/kotlin/com/cubetiqs/money/MoneyObject.kt
index 777f362..2f38cdf 100644
--- a/src/main/kotlin/com/cubetiqs/money/MoneyObject.kt
+++ b/src/main/kotlin/com/cubetiqs/money/MoneyObject.kt
@@ -9,16 +9,16 @@ import java.util.*
  * @author sombochea
  */
 class MoneyObject(
-    var value: Double,
-    var currency: String,
+    private var value: Double,
+    private var currency: String,
     var operator: MoneyOperator? = null,
     var with: MoneyObject? = null,
 ) : StdMoney {
-    override fun getMoneyCurrency(): StdMoney.Currency {
+    override fun getCurrency(): StdMoney.Currency {
         return StdMoney.initCurrency(currency)
     }
 
-    override fun getMoneyValue(): Double {
+    override fun getValue(): Double {
         return value
     }
 
@@ -55,9 +55,9 @@ class MoneyObject(
                 else -> this plusWith next
             }
             // move the temp value that computed
-            this.value = temp.getMoneyValue()
+            this.value = temp.getValue()
             // move the currency into parent, if changed
-            this.currency = temp.getMoneyCurrency().getCurrency()
+            this.currency = temp.getCurrency().getCurrency()
             // move the first operator to previous next operator
             // example: first ops = +, then next ops = -, then inside next ops = *, n
             // return next: first ops = -, then next ops = *, then n
diff --git a/src/main/kotlin/com/cubetiqs/money/MoneyOperator.kt b/src/main/kotlin/com/cubetiqs/money/MoneyOperator.kt
index 9d3b3eb..d5657ed 100644
--- a/src/main/kotlin/com/cubetiqs/money/MoneyOperator.kt
+++ b/src/main/kotlin/com/cubetiqs/money/MoneyOperator.kt
@@ -1,8 +1,8 @@
 package com.cubetiqs.money
 
 // unary operators
-operator fun StdMoney.unaryMinus() = (-getMoneyValue())
-operator fun StdMoney.unaryPlus() = (+getMoneyValue())
+operator fun StdMoney.unaryMinus() = (-getValue())
+operator fun StdMoney.unaryPlus() = (+getValue())
 
 // operators
 operator fun StdMoney.inc() = Money.from(this).inc()
diff --git a/src/main/kotlin/com/cubetiqs/money/StdMoney.kt b/src/main/kotlin/com/cubetiqs/money/StdMoney.kt
index 0857fde..260ff26 100644
--- a/src/main/kotlin/com/cubetiqs/money/StdMoney.kt
+++ b/src/main/kotlin/com/cubetiqs/money/StdMoney.kt
@@ -13,14 +13,14 @@ interface StdMoney {
      *
      * @return Double
      */
-    fun getMoneyValue(): Double
+    fun getValue(): Double
 
     /**
      * Get money's currency from current state.
      *
      * @return String
      */
-    fun getMoneyCurrency(): Currency
+    fun getCurrency(): Currency
 
     /**
      * Allow for money currency called and implemented
@@ -68,11 +68,11 @@ interface StdMoney {
 
         fun initMoney(initValue: Double, currency: Currency = USD): StdMoney {
             return object : StdMoney {
-                override fun getMoneyCurrency(): Currency {
+                override fun getCurrency(): Currency {
                     return currency
                 }
 
-                override fun getMoneyValue(): Double {
+                override fun getValue(): Double {
                     return initValue
                 }
             }
diff --git a/src/test/kotlin/MoneyTests.kt b/src/test/kotlin/MoneyTests.kt
index 7d78ebd..73c40e5 100644
--- a/src/test/kotlin/MoneyTests.kt
+++ b/src/test/kotlin/MoneyTests.kt
@@ -10,7 +10,7 @@ class MoneyTests {
                 setDeliSplit(',')
             })
 
-            fromJson(MyBatchRates.getJsonRates())
+            fromJsonRates(MyBatchRates.getJsonRates())
         }
     }
 
@@ -46,13 +46,13 @@ class MoneyTests {
         val moneyKhr = moneyUsd exchangeTo "khr"
 
         // Is correct exchange?
-        Assert.assertEquals(8000.0, moneyKhr.getMoneyValue(), 0.0)
+        Assert.assertEquals(8000.0, moneyKhr.getValue(), 0.0)
 
         // complex operators and exchanging
         val sum =
             ((moneyUsd + moneyKhr) * Money.TEN) exchangeTo MoneyCurrency.KHR minusWith (Money.ONE exchangeTo MoneyCurrency.KHR)
 
-        Assert.assertEquals(156000.0, sum.getMoneyValue(), 0.0)
+        Assert.assertEquals(156000.0, sum.getValue(), 0.0)
     }
 
     @Test
@@ -76,7 +76,7 @@ class MoneyTests {
 
         val result = moneyGen.compute()
 
-        Assert.assertEquals(2.75, result.getMoneyValue(), 0.0)
+        Assert.assertEquals(2.75, result.getValue(), 0.0)
     }
 
     @Test
@@ -100,7 +100,7 @@ class MoneyTests {
 
         println(result)
 
-        Assert.assertEquals(expected, result.getMoneyValue(), 0.0)
+        Assert.assertEquals(expected, result.getValue(), 0.0)
     }
 
     @Test
@@ -132,7 +132,7 @@ class MoneyTests {
             .compute()
         val result2 = builder.compute()
 
-        Assert.assertEquals(expected1, result1.getMoneyValue(), 0.0)
-        Assert.assertEquals(expected2, result2.getMoneyValue(), 0.0)
+        Assert.assertEquals(expected1, result1.getValue(), 0.0)
+        Assert.assertEquals(expected2, result2.getValue(), 0.0)
     }
 }
\ No newline at end of file