Updated on 2026-08-14

domain/core/.gitignore

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

domain/core/build.gradle.kts

@@ -0,0 +1,10 @@
+plugins {
+    alias(deps.plugins.kotlin.jvm)
+    id("configuration")
+}
+
+dependencies {
+    api(deps.kotlin.coroutines)
+    api(deps.arrow.core)
+    api(deps.arrow.fx)
+}

domain/core/src/main/kotlin/com/tangem/domain/core/chain/Chain.kt

@@ -0,0 +1,7 @@
+package com.tangem.domain.core.chain
+
+import arrow.core.Either
+
+interface Chain<E, R> {
+    suspend operator fun invoke(previousChainResult: Either<E, R>): Either<E, R>
+}

domain/core/src/main/kotlin/com/tangem/domain/core/chain/ChainProcessor.kt

@@ -0,0 +1,28 @@
+package com.tangem.domain.core.chain
+
+import arrow.core.Either
+
+class ChainProcessor<E, R> {
+    private val chains: MutableList<Chain<E, R>> = mutableListOf()
+
+    fun addChains(vararg chains: Chain<E, R>) {
+        this.chains.addAll(chains)
+    }
+
+    suspend fun launchChains(initial: R, returnOnFirstError: Boolean = true): Either<E, R> {
+        return launchChains(initial = Either.Right(initial), returnOnFirstError)
+    }
+
+    private suspend fun launchChains(initial: Either<E, R>, returnOnFirstError: Boolean = true): Either<E, R> {
+        var result = initial
+
+        chains.forEach { chain ->
+            result = chain(result)
+                .onRight {
+                    if (returnOnFirstError) return result
+                }
+        }
+
+        return result
+    }
+}

gradle/dependencies.toml

@@ -68,6 +68,7 @@ zxingQrBarcodeScanner = "1.9.8"
 zxingQrCode = "3.5.1"
 mviCore = "1.3.1"
 kotlinSerialization = "1.4.1"
+arrow = "1.2.0-RC"
 # endregion Other libraries
 
 # region Tangem
@@ -206,4 +207,6 @@ zxing-qrBarcodeScanner = { module = "me.dm7.barcodescanner:zxing", version.ref =
 zxing-qrCore = { module = "com.google.zxing:core", version.ref = "zxingQrCode" }
 mviCore-watcher = { module = "com.github.badoo.mvicore:mvicore-diff", version.ref = "mviCore" }
 kotlin-serialization = { module = "org.jetbrains.kotlinx:kotlinx-serialization-json", version.ref = "kotlinSerialization" }
+arrow-core = { module = "io.arrow-kt:arrow-core", version.ref = "arrow" }
+arrow-fx = { module = "io.arrow-kt:arrow-fx-coroutines", version.ref = "arrow" }
 # endregion Other

settings.gradle.kts

@@ -62,4 +62,6 @@ include(":features:tester:impl")
 // TODO: Remove, temporary modules
 include(":domain:models")
 include(":domain:legacy")
+
+include(":domain:core")
 // endregion Domain modules