Updated on 2026-08-14

domain/core/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     alias(deps.plugins.kotlin.jvm)
+    alias(deps.plugins.kotlin.serialization)
     id("configuration")
 }
 
@@ -7,4 +8,6 @@ dependencies {
     api(deps.kotlin.coroutines)
     api(deps.arrow.core)
     api(deps.arrow.fx)
+
+    implementation(deps.kotlin.serialization)
 }

domain/core/src/main/kotlin/com/tangem/domain/core/serialization/BigDecimalSerializer.kt

@@ -0,0 +1,21 @@
+package com.tangem.domain.core.serialization
+
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.descriptors.PrimitiveKind
+import kotlinx.serialization.descriptors.PrimitiveSerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import java.math.BigDecimal
+
+internal object BigDecimalSerializer : KSerializer<BigDecimal> {
+
+    override val descriptor = PrimitiveSerialDescriptor(serialName = "BigDecimal", PrimitiveKind.STRING)
+
+    override fun serialize(encoder: Encoder, value: BigDecimal) {
+        encoder.encodeString(value.toString())
+    }
+
+    override fun deserialize(decoder: Decoder): BigDecimal {
+        return BigDecimal(decoder.decodeString())
+    }
+}

domain/core/src/main/kotlin/com/tangem/domain/core/serialization/SerializedBigDecimal.kt

@@ -0,0 +1,6 @@
+package com.tangem.domain.core.serialization
+
+import kotlinx.serialization.Serializable
+import java.math.BigDecimal
+
+typealias SerializedBigDecimal = @Serializable(with = BigDecimalSerializer::class) BigDecimal

domain/staking/build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     alias(deps.plugins.android.library)
     alias(deps.plugins.kotlin.android)
+    alias(deps.plugins.kotlin.serialization)
     id("configuration")
 }
 
@@ -10,10 +11,10 @@ android {
 
 
 dependencies {
-    implementation(deps.kotlin.coroutines)
-    implementation(deps.arrow.core)
-    implementation(deps.kotlin.serialization)
+    api(projects.domain.staking.models)
 
+    api(projects.domain.core)
+    implementation(deps.kotlin.serialization)
 
     implementation(projects.domain.tokens.models)
 }

domain/staking/models/.gitignore

@@ -0,0 +1 @@
+/build

domain/staking/models/build.gradle.kts

@@ -0,0 +1,11 @@
+plugins {
+    alias(deps.plugins.kotlin.jvm)
+    alias(deps.plugins.kotlin.serialization)
+    id("configuration")
+}
+
+dependencies {
+    implementation(projects.domain.core)
+
+    implementation(deps.kotlin.serialization)
+}

domain/staking/models/src/main/kotlin/com/tangem/domain/staking/model/Yield.kt

@@ -1,54 +1,64 @@
 package com.tangem.domain.staking.model
 
-import java.io.Serializable
-import java.math.BigDecimal
+import com.tangem.domain.core.serialization.SerializedBigDecimal
+import kotlinx.serialization.Serializable
 
+@Serializable
 data class Yield(
     val id: String,
     val token: Token,
     val tokens: List<Token>,
     val args: Args,
     val status: Status,
-    val apy: BigDecimal,
+    val apy: SerializedBigDecimal,
     val rewardRate: Double,
     val rewardType: RewardType,
     val metadata: Metadata,
     val validators: List<Validator>,
     val isAvailable: Boolean,
-) : Serializable {
+) {
+
+    @Serializable
     data class Status(
         val enter: Boolean,
         val exit: Boolean?,
-    ) : Serializable
+    )
 
+    @Serializable
     data class Args(
         val enter: Enter,
         val exit: Enter?,
-    ) : Serializable {
+    ) {
+
+        @Serializable
         data class Enter(
             val addresses: Addresses,
             val args: Map<String, AddressArgument>,
-        ) : Serializable {
+        ) {
+
+            @Serializable
             data class Addresses(
                 val address: AddressArgument,
                 val additionalAddresses: Map<String, AddressArgument>? = null,
-            ) : Serializable
+            )
         }
     }
 
+    @Serializable
     data class Validator(
         val address: String,
         val status: String,
         val name: String,
         val image: String?,
         val website: String?,
-        val apr: BigDecimal?,
+        val apr: SerializedBigDecimal?,
         val commission: Double?,
         val stakedBalance: String?,
         val votingPower: Double?,
         val preferred: Boolean,
-    ) : Serializable
+    )
 
+    @Serializable
     data class Metadata(
         val name: String,
         val logoUri: String,
@@ -67,14 +77,17 @@ data class Yield(
         val supportsMultipleValidators: Boolean,
         val revshare: Enabled,
         val fee: Enabled,
-    ) : Serializable {
+    ) {
+
+        @Serializable
         data class Period(
             val days: Int,
-        ) : Serializable
+        )
 
+        @Serializable
         data class Enabled(
             val enabled: Boolean,
-        ) : Serializable
+        )
     }
 
     enum class RewardType {
@@ -84,6 +97,7 @@ data class Yield(
     }
 }
 
+@Serializable
 data class Token(
     val name: String,
     val network: NetworkType,
@@ -93,7 +107,7 @@ data class Token(
     val coinGeckoId: String?,
     val logoURI: String?,
     val isPoints: Boolean?,
-) : Serializable {
+) {
     enum class NetworkType {
         AVALANCHE_C,
         AVALANCHE_ATOMIC,
@@ -165,9 +179,10 @@ data class Token(
     }
 }
 
+@Serializable
 data class AddressArgument(
     val required: Boolean,
     val network: String? = null,
     val minimum: Double? = null,
     val maximum: Double? = null,
-) : Serializable
+)

domain/tokens/models/src/main/java/com/tangem/domain/tokens/model/CryptoCurrency.kt

@@ -188,11 +188,11 @@ sealed class CryptoCurrency {
             return "ID(value='$value')"
         }
 
-        private companion object {
+        companion object {
             // should use delimiters that could be used in URL not like path or query delimiters
-            const val PREFIX_DELIMITER = '_'
-            const val SUFFIX_DELIMITER = ';'
-            const val DERIVATION_PATH_DELIMITER = 'd'
+            private const val PREFIX_DELIMITER = '_'
+            private const val SUFFIX_DELIMITER = ';'
+            private const val DERIVATION_PATH_DELIMITER = 'd'
         }
     }