Updated on 2026-08-14

common/src/main/java/com/tangem/common/Validator.kt

@@ -0,0 +1,8 @@
+package com.tangem.common
+
+/**
+[REDACTED_AUTHOR]
+ */
+interface Validator<Data, Error> {
+    fun validate(data: Data? = null): Error?
+}

common/src/main/java/com/tangem/common/module/ModuleException.kt

@@ -0,0 +1,14 @@
+package com.tangem.common.module
+
+/**
+[REDACTED_AUTHOR]
+ * A module exception
+ */
+interface ModuleException {
+    val message: String
+}
+
+/**
+ * An exception marked as FbConsumeException should be submitted to Firebase.Crashlytics as a non-fatal issue.
+ */
+interface FbConsumeException

common/src/main/java/com/tangem/common/module/ModuleMessage.kt

@@ -0,0 +1,22 @@
+package com.tangem.common.module
+
+/**
+[REDACTED_AUTHOR]
+ * The base object for communication between modules
+ */
+interface ModuleMessage
+
+interface ModuleMessageConverter<ModuleMessage, R> {
+    fun convert(message: ModuleMessage): R
+}
+
+/**
+ * @property code describes what feature is the error coming from
+ * @property message the error description
+ * @property data any data that can help in the part where this error is being handled
+ */
+interface ModuleError : ModuleMessage {
+    val code: Int
+    val message: String
+    val data: Any?
+}