Updated on 2026-08-14

domain/express/build.gradle.kts

@@ -1,24 +1,10 @@
 plugins {
-    alias(deps.plugins.android.library)
-    alias(deps.plugins.kotlin.android)
+    alias(deps.plugins.kotlin.jvm)
     alias(deps.plugins.kotlin.serialization)
     id("configuration")
 }
 
-android {
-    namespace = "com.tangem.domain.express.models"
-}
-
 dependencies {
-    /** Core */
-    implementation(projects.core.utils)
-    implementation(projects.core.datasource)
-
-    /** Domain */
-    implementation(projects.domain.express.models)
+    api(projects.domain.express.models)
     api(projects.domain.models)
-    implementation(projects.domain.tokens.models)
-
-    /** Other */
-    implementation(deps.moshi.adapters)
 }

domain/express/models/build.gradle.kts

@@ -1,12 +1,10 @@
 plugins {
     alias(deps.plugins.kotlin.jvm)
+    alias(deps.plugins.kotlin.serialization)
     id("configuration")
 }
 
 dependencies {
-    /** Domain */
-    implementation(projects.domain.tokens.models)
-
-    /* Other */
     implementation(deps.moshi.adapters)
+    implementation(deps.kotlin.serialization)
 }

domain/express/models/src/main/java/com/tangem/domain/express/models/ExpressAsset.kt

@@ -0,0 +1,48 @@
+package com.tangem.domain.express.models
+
+import kotlinx.serialization.Serializable
+
+/**
+ * Express asset model.
+ *
+ * @property id The unique identifier of the Express asset.
+ * @property isExchangeAvailable Indicates if exchange is available for this asset.
+ * @property isOnrampAvailable Indicates if onramp is available for this asset (nullable).
+ *
+[REDACTED_AUTHOR]
+ */
+@Serializable
+data class ExpressAsset(
+    val id: ID,
+    val isExchangeAvailable: Boolean,
+    val isOnrampAvailable: Boolean?,
+) {
+
+    /**
+     * Unique identifier for an Express asset, consisting of network ID and contract address.
+     *
+     * @property networkId The network ID of the asset.
+     * @property contractAddress The contract address of the asset.
+     */
+    @Serializable
+    data class ID(val networkId: String, val contractAddress: String) {
+
+        companion object {
+
+            /**
+             * Creates an [ID] instance, defaulting the contract address to "0" if null.
+             *
+             * @param networkId The network ID of the asset.
+             * @param contractAddress The contract address of the asset, or null to default to "0".
+             * @return An [ID] instance with the specified network ID and contract address.
+             */
+            operator fun invoke(networkId: String, contractAddress: String?): ID {
+                return ID(networkId = networkId, contractAddress = contractAddress ?: EMPTY_CONTRACT_ADDRESS_VALUE)
+            }
+        }
+    }
+
+    companion object {
+        const val EMPTY_CONTRACT_ADDRESS_VALUE = "0"
+    }
+}

domain/express/src/main/java/com/tangem/domain/express/ExpressServiceFetcher.kt

@@ -0,0 +1,38 @@
+package com.tangem.domain.express
+
+import arrow.core.Either
+import com.tangem.domain.core.lce.Lce
+import com.tangem.domain.express.models.ExpressAsset
+import com.tangem.domain.models.wallet.UserWallet
+import com.tangem.domain.models.wallet.UserWalletId
+import kotlinx.coroutines.flow.Flow
+
+/**
+ * Service interface to fetch Express assets data and monitor initialization status.
+ */
+interface ExpressServiceFetcher {
+
+    /**
+     * Fetches Express assets data for the given user wallet ID and asset IDs.
+     *
+     * @param userWalletId The ID of the user wallet.
+     * @param assetIds The list of Express asset IDs to fetch.
+     */
+    suspend fun fetch(userWalletId: UserWalletId, assetIds: Set<ExpressAsset.ID>): Either<Throwable, Unit>
+
+    /**
+     * Fetches Express assets data for the given user wallet and asset IDs.
+     *
+     * @param userWallet The user wallet for which to fetch assets.
+     * @param assetIds The list of Express asset IDs to fetch.
+     */
+    suspend fun fetch(userWallet: UserWallet, assetIds: Set<ExpressAsset.ID>): Either<Throwable, Unit>
+
+    /**
+     * Returns a flow that emits the initialization status of Express assets for the given user wallet ID.
+     *
+     * @param userWalletId The ID of the user wallet.
+     * @return A flow emitting Lce states containing either a list of Express assets or an error.
+     */
+    fun getInitializationStatus(userWalletId: UserWalletId): Flow<Lce<Throwable, List<ExpressAsset>>>
+}