Updated on 2026-08-14

app/src/main/java/com/tangem/tap/common/entities/FiatCurrency.kt

@@ -0,0 +1,18 @@
+package com.tangem.tap.common.entities
+
+data class FiatCurrency(
+    val code: String,
+    val name: String,
+    val symbol: String,
+) {
+    val displayName: String
+        get() = "${this.name} (${this.code}) - ${this.symbol}"
+
+    companion object {
+        val Default = FiatCurrency(
+            symbol = "$",
+            code = "USD",
+            name = "US Dollar",
+        )
+    }
+}

app/src/main/java/com/tangem/tap/common/entities/TapCurrency.kt

@@ -1,10 +0,0 @@
-package com.tangem.tap.common.entities
-
-/**
-[REDACTED_AUTHOR]
- */
-class TapCurrency {
-    companion object{
-        const val DEFAULT_FIAT_CURRENCY = "USD"
-    }
-}

app/src/main/java/com/tangem/tap/common/extensions/Specific.kt

@@ -1,8 +1,10 @@
 package com.tangem.tap.common.extensions
 
+import android.text.Spanned
+import android.text.SpannedString
+import android.text.style.RelativeSizeSpan
+import androidx.core.text.buildSpannedString
 import com.tangem.common.extensions.isZero
-import com.tangem.network.api.tangemTech.CurrenciesResponse
-import com.tangem.tap.common.redux.global.FiatCurrencyName
 import java.math.BigDecimal
 import java.math.RoundingMode
 import java.text.DecimalFormat
@@ -37,7 +39,7 @@ fun BigDecimal.toFormattedCurrencyString(
     return "$formattedAmount $currency"
 }
 
-fun BigDecimal.toFiatString(rateValue: BigDecimal, fiatCurrencyName: FiatCurrencyName): String {
+fun BigDecimal.toFiatString(rateValue: BigDecimal, fiatCurrencyName: String): String {
     var fiatValue = rateValue.multiply(this)
     fiatValue = fiatValue.setScale(2, RoundingMode.HALF_UP)
     return "≈ ${fiatCurrencyName}  $fiatValue"
@@ -48,12 +50,10 @@ fun BigDecimal.toFiatValue(rateValue: BigDecimal): BigDecimal {
     return fiatValue.setScale(2, RoundingMode.HALF_UP)
 }
 
-fun BigDecimal.toFormattedFiatValue(fiatCurrencyName: FiatCurrencyName): String {
+fun BigDecimal.toFormattedFiatValue(fiatCurrencyName: String): String {
     return "≈ ${fiatCurrencyName}  $this"
 }
 
-fun CurrenciesResponse.Currency.toFormattedString(): String = "${this.name} (${this.code}) - ${this.unit}"
-
 fun BigDecimal.stripZeroPlainString(): String = this.stripTrailingZeros().toPlainString()
 
 // 0.00 -> 0.00
@@ -87,4 +87,28 @@ fun BigDecimal.isGreaterThanOrEqual(value: BigDecimal): Boolean {
 fun BigDecimal.isLessThanOrEqual(value: BigDecimal): Boolean {
     val compareResult = this.compareTo(value)
     return compareResult == -1 || compareResult == 0
+}
+
+fun BigDecimal.formatAmountAsSpannedString(
+    currencySymbol: String,
+    integerPartSizeProportion: Float = 1.4f
+): SpannedString {
+    val amount = this.toFormattedString(
+        decimals = 2,
+        roundingMode = RoundingMode.HALF_UP
+    )
+    val integer = amount.substringAfter('.')
+    val reminder = amount.substringBefore('.')
+
+    return buildSpannedString {
+        append(
+            integer,
+            RelativeSizeSpan(integerPartSizeProportion),
+            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
+        )
+        append('.')
+        append(reminder)
+        append(' ')
+        append(currencySymbol)
+    }
 }

app/src/main/java/com/tangem/tap/common/extensions/UI.kt

@@ -1,5 +1,7 @@
 package com.tangem.tap.common.extensions
 
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
 import android.app.Activity
 import android.content.*
 import android.content.res.Resources
@@ -16,6 +18,7 @@ import androidx.annotation.ColorRes
 import androidx.annotation.DrawableRes
 import androidx.annotation.StringRes
 import androidx.core.content.ContextCompat
+import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import com.google.android.material.card.MaterialCardView
 import com.tangem.common.extensions.VoidCallback
@@ -187,4 +190,47 @@ fun Context.safeStartActivity(
 
 fun View.getString(resId: Int, vararg formatArgs: Any?): String {
     return context.getString(resId, formatArgs)
+}
+
+fun View.showAnimated(durationMillis: Long = 300) {
+    this.animateVisibility(
+        show = true,
+        durationMillis = durationMillis
+    )
+}
+
+fun View.hideAnimated(
+    durationMillis: Long = 300,
+    hiddenVisibility: Int = View.GONE
+) {
+    this.animateVisibility(
+        show = false,
+        durationMillis = durationMillis,
+        hiddenVisibility = hiddenVisibility
+    )
+}
+
+private fun View.animateVisibility(
+    show: Boolean,
+    durationMillis: Long = 300,
+    hiddenVisibility: Int = View.GONE
+) {
+    if (this.isVisible == show) return
+    if (show) {
+        this.alpha = 0f
+        this.isVisible = true
+        this.animate()
+            .alpha(1f)
+            .setDuration(durationMillis)
+            .setListener(null)
+    } else {
+        this.animate()
+            .alpha(0f)
+            .setDuration(durationMillis)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator?) {
+                    this@animateVisibility.visibility = hiddenVisibility
+                }
+            })
+    }
 }

app/src/main/java/com/tangem/tap/common/extensions/WalletManager.kt

@@ -57,7 +57,7 @@ fun WalletManager?.getToUpUrl(): String? {
         action = CurrencyExchangeManager.Action.Buy,
         blockchain = wallet.blockchain,
         cryptoCurrencyName = wallet.blockchain.currency,
-        fiatCurrency = globalState.appCurrency,
+        fiatCurrencyName = globalState.appCurrency.code,
         walletAddress = defaultAddress,
     )
 }

app/src/main/java/com/tangem/tap/common/redux/global/GlobalAction.kt

@@ -6,6 +6,7 @@ import com.tangem.common.CompletionResult
 import com.tangem.common.core.TangemError
 import com.tangem.domain.common.ScanResponse
 import com.tangem.tap.common.analytics.GlobalAnalyticsHandler
+import com.tangem.tap.common.entities.FiatCurrency
 import com.tangem.tap.common.redux.*
 import com.tangem.tap.domain.TapError
 import com.tangem.tap.domain.configurable.config.ConfigManager
@@ -54,9 +55,9 @@ sealed class GlobalAction : Action {
 
     data class SetIfCardVerifiedOnline(val verified: Boolean) : GlobalAction()
 
-    data class ChangeAppCurrency(val appCurrency: FiatCurrencyName) : GlobalAction()
+    data class ChangeAppCurrency(val appCurrency: FiatCurrency) : GlobalAction()
     object RestoreAppCurrency : GlobalAction() {
-        data class Success(val appCurrency: FiatCurrencyName) : GlobalAction()
+        data class Success(val appCurrency: FiatCurrency) : GlobalAction()
     }
 
     data class UpdateWalletSignedHashes(

app/src/main/java/com/tangem/tap/common/redux/global/GlobalMidlleware.kt

@@ -24,7 +24,7 @@ class GlobalMiddleware {
     }
 }
 
-private val globalMiddlewareHandler: Middleware<AppState> = { dispatch, appState ->
+private val globalMiddlewareHandler: Middleware<AppState> = { _, appState ->
     { nextDispatch ->
         { action ->
             when (action) {
@@ -45,7 +45,7 @@ private val globalMiddlewareHandler: Middleware<AppState> = { dispatch, appState
                 }
                 is GlobalAction.RestoreAppCurrency -> {
                     store.dispatch(GlobalAction.RestoreAppCurrency.Success(
-                        preferencesStorage.getAppCurrency()
+                        preferencesStorage.fiatCurrenciesPrefStorage.getAppCurrency()
                     ))
                 }
                 is GlobalAction.HideWarningMessage -> {

app/src/main/java/com/tangem/tap/common/redux/global/GlobalState.kt

@@ -2,7 +2,7 @@ package com.tangem.tap.common.redux.global
 
 import com.tangem.domain.common.ScanResponse
 import com.tangem.tap.common.analytics.AnalyticsHandler
-import com.tangem.tap.common.entities.TapCurrency.Companion.DEFAULT_FIAT_CURRENCY
+import com.tangem.tap.common.entities.FiatCurrency
 import com.tangem.tap.common.redux.StateDialog
 import com.tangem.tap.domain.PayIdManager
 import com.tangem.tap.domain.TapWalletManager
@@ -22,7 +22,7 @@ data class GlobalState(
     val configManager: ConfigManager? = null,
     val warningManager: WarningMessagesManager? = null,
     val feedbackManager: FeedbackManager? = null,
-    val appCurrency: FiatCurrencyName = DEFAULT_FIAT_CURRENCY,
+    val appCurrency: FiatCurrency = FiatCurrency.Default,
     val scanCardFailsCounter: Int = 0,
     val dialog: StateDialog? = null,
     val currencyExchangeManager: CurrencyExchangeManager? = null,
@@ -40,7 +40,6 @@ data class AndroidResources(
     )
 }
 typealias CryptoCurrencyName = String
-typealias FiatCurrencyName = String
 
 data class OnboardingState(
     val onboardingStarted: Boolean = false,