Updated on 2026-08-14

core/datasource/build.gradle.kts

@@ -18,6 +18,10 @@ android {
     }
 }
 
+tasks.withType<Test>().configureEach {
+    useJUnitPlatform()
+}
+
 dependencies {
 
     /** Project */
@@ -84,7 +88,8 @@ dependencies {
     ksp(deps.room.compiler)
 
     testImplementation(deps.test.coroutine)
-    testImplementation(deps.test.junit)
+    testImplementation(deps.test.junit5)
+    testRuntimeOnly(deps.test.junit5.engine)
     testImplementation(deps.test.mockk)
     testImplementation(deps.test.truth)
 }

core/datasource/src/main/java/com/tangem/datasource/local/logs/AppLogsStore.kt

@@ -115,7 +115,8 @@ class AppLogsStore @Inject constructor(
         BufferedWriter(FileWriter(logFile, true)).use { writer ->
             writer.append(formatter.print(DateTime.now()))
             writer.append(": $tag ")
-            messages.forEach(writer::append)
+            messages.map(LogsSanitizer::sanitize)
+                .forEach(writer::append)
             writer.newLine()
         }
     }

core/datasource/src/main/java/com/tangem/datasource/local/logs/LogsSanitizer.kt

@@ -0,0 +1,16 @@
+package com.tangem.datasource.local.logs
+
+/**
+ * Logs sanitizer
+ *
+[REDACTED_AUTHOR]
+ */
+internal object LogsSanitizer {
+
+    private val HEX_REGEX = Regex("(0[xX])?(?:[A-Fa-f0-9]{2}-?){4,}")
+    private const val HIDDEN_TEXT = "******"
+
+    fun sanitize(value: String): String {
+        return HEX_REGEX.replace(input = value, replacement = HIDDEN_TEXT)
+    }
+}

core/datasource/src/test/kotlin/com/tangem/datasource/local/logs/LogsSanitizerTest.kt

@@ -0,0 +1,53 @@
+package com.tangem.datasource.local.logs
+
+import com.google.common.truth.Truth
+import org.junit.jupiter.api.TestInstance
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.MethodSource
+
+/**
+[REDACTED_AUTHOR]
+ */
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+internal class LogsSanitizerTest {
+
+    @ParameterizedTest
+    @MethodSource("provideTestModels")
+    fun sanitize(model: TestModel) {
+        // Act
+        val actual = LogsSanitizer.sanitize(model.input)
+
+        // Assert
+        val expected = model.expected
+        Truth.assertThat(actual).isEqualTo(expected)
+    }
+
+    private fun provideTestModels() = listOf(
+        TestModel(input = "dead-beef-cafe-babe", expected = HIDDEN_TEXT),
+        TestModel(input = "[dead-beef-cafe-babe]", expected = "[$HIDDEN_TEXT]"),
+        TestModel(input = "0xdead-beef-cafe-babe", expected = HIDDEN_TEXT),
+        TestModel(input = "0XaA-Bb-Cc-Dd-Ee-Ff", expected = HIDDEN_TEXT),
+        TestModel(input = "A1B2C3D4E5F6", expected = HIDDEN_TEXT),
+        TestModel(input = "deadbeefcafebabe", expected = HIDDEN_TEXT),
+        TestModel(input = "deadbeefcafebabe", expected = HIDDEN_TEXT),
+        TestModel(
+            input = "Values: 12345678 and ABCDEF12 and cafe9876",
+            expected = "Values: $HIDDEN_TEXT and $HIDDEN_TEXT and $HIDDEN_TEXT",
+        ),
+        TestModel(
+            input = "Chunks: DEADBEEF CAFEBABE F00DBABE",
+            expected = "Chunks: $HIDDEN_TEXT $HIDDEN_TEXT $HIDDEN_TEXT",
+        ),
+        TestModel(
+            input = "Normal log message without secrets",
+            expected = "Normal log message without secrets",
+        ),
+    )
+
+    data class TestModel(val input: String, val expected: String)
+
+    private companion object {
+
+        const val HIDDEN_TEXT = "******"
+    }
+}