Updated on 2026-08-14

app/build.gradle.kts

@@ -64,6 +64,7 @@ dependencies {
     implementation(projects.domain.analytics)
     implementation(projects.domain.visa)
     implementation(projects.domain.onboarding)
+    implementation(projects.domain.feedback)
 
     implementation(projects.common)
     implementation(projects.core.analytics)

app/src/main/java/com/tangem/tap/common/feedback/FeedbackData.kt

@@ -73,15 +73,9 @@ class SendTransactionFailedEmail(
 
 class FeedbackEmail : FeedbackData {
     override val subjectResId: Int
-        get() = if (isS2CCard) s2cSubject else tangemSubject
-    override val mainMessageResId: Int
-        get() = if (isS2CCard) s2cMainMessage else tangemMainMessage
+        get() = if (isS2CCard) R.string.feedback_subject_support else R.string.feedback_subject_support_tangem
 
-    private val tangemSubject: Int = R.string.feedback_subject_support_tangem
-    private val tangemMainMessage: Int = R.string.feedback_preface_support
-
-    private val s2cSubject: Int = R.string.feedback_subject_support
-    private val s2cMainMessage: Int = R.string.feedback_preface_support
+    override val mainMessageResId: Int = R.string.feedback_preface_support
 
     private var isS2CCard = false
 

domain/feedback/.gitignore

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

domain/feedback/build.gradle.kts

@@ -0,0 +1,13 @@
+plugins {
+    alias(deps.plugins.android.library)
+    alias(deps.plugins.kotlin.android)
+    id("configuration")
+}
+
+android {
+    namespace = "com.tangem.domain.feedback"
+}
+
+dependencies {
+    implementation(projects.core.res)
+}

domain/feedback/src/main/java/com/tangem/domain/feedback/FeedbackDataBuilder.kt

@@ -0,0 +1,78 @@
+package com.tangem.domain.feedback
+
+import com.tangem.domain.feedback.models.BlockchainInfo
+import com.tangem.domain.feedback.models.CardInfo
+import com.tangem.domain.feedback.models.PhoneInfo
+import com.tangem.domain.feedback.utils.breakLine
+
+internal class FeedbackDataBuilder {
+
+    private val builder = StringBuilder()
+
+    fun addCardInfo(cardInfo: CardInfo) {
+        builder.appendKeyValue("Card ID", cardInfo.cardId)
+        builder.appendKeyValue("Firmware version", cardInfo.firmwareVersion)
+        builder.appendKeyValue("Card Blockchain", cardInfo.cardBlockchain)
+        builder.appendSignedHashes(cardInfo.signedHashesList)
+        builder.appendKeyValue("User Wallet ID", cardInfo.userWalletId)
+    }
+
+    fun addBlockchainInfoList(blockchainInfoList: List<BlockchainInfo>) {
+        blockchainInfoList.forEachBlockchain { isLastIndex ->
+            builder.appendKeyValue("Blockchain", blockchain)
+            builder.appendKeyValue("Derivation path", derivationPath)
+
+            // enable later
+            // if (walletInfo.blockchain == Blockchain.Bitcoin) {
+            //     builder.appendKeyValue("XPUB", infoHolder.extendedPublicKey)
+            // }
+
+            builder.appendKeyValue("Outputs count", outputsCount)
+
+            if (tokens.isNotEmpty()) {
+                builder.append("Tokens:")
+                builder.breakLine()
+                tokens.forEach { token ->
+                    builder.appendKeyValue("ID", token.id ?: "[custom token]")
+                    builder.appendKeyValue("Name", token.name)
+                    builder.appendKeyValue("Contract address", token.contractAddress)
+                }
+            }
+
+            builder.appendKeyValue("Host", host)
+            builder.appendKeyValue("Wallet address", addresses)
+            builder.appendKeyValue("Explorer link", explorerLink)
+
+            if (!isLastIndex) builder.appendDelimiter()
+        }
+    }
+
+    fun addPhoneInfo(phoneInfo: PhoneInfo) {
+        builder.appendKeyValue("Phone model", phoneInfo.phoneModel)
+        builder.appendKeyValue("OS version", phoneInfo.osVersion)
+        builder.appendKeyValue("App version", phoneInfo.appVersion)
+    }
+
+    fun addDelimiter(): StringBuilder = builder.appendDelimiter()
+
+    fun build(): String = builder.toString()
+
+    private fun StringBuilder.appendKeyValue(key: String, value: String?) {
+        if (value.isNullOrBlank()) return
+
+        val keyValuePrefix = if (key.isBlank()) "" else "$key: "
+        append("$keyValuePrefix$value\n")
+    }
+
+    private fun StringBuilder.appendSignedHashes(signedHashesList: List<CardInfo.SignedHashes>) {
+        signedHashesList.forEach {
+            appendKeyValue("Signed hashes [${it.curve}]", it.total)
+        }
+    }
+
+    private fun StringBuilder.appendDelimiter(): StringBuilder = append("----------\n")
+
+    private inline fun List<BlockchainInfo>.forEachBlockchain(action: BlockchainInfo.(Boolean) -> Unit) {
+        return forEachIndexed { index, info -> info.action(index == lastIndex) }
+    }
+}

domain/feedback/src/main/java/com/tangem/domain/feedback/models/BlockchainInfo.kt

@@ -0,0 +1,18 @@
+package com.tangem.domain.feedback.models
+
+data class BlockchainInfo(
+    val blockchain: String,
+    val derivationPath: String,
+    val outputsCount: String?,
+    val host: String,
+    val addresses: String,
+    val explorerLink: String,
+    val tokens: List<TokenInfo>,
+) {
+
+    data class TokenInfo(
+        val id: String?,
+        val name: String,
+        val contractAddress: String,
+    )
+}

domain/feedback/src/main/java/com/tangem/domain/feedback/models/CardInfo.kt

@@ -0,0 +1,13 @@
+package com.tangem.domain.feedback.models
+
+data class CardInfo(
+    val userWalletId: String,
+    val cardId: String,
+    val firmwareVersion: String,
+    val cardBlockchain: String?,
+    val signedHashesList: List<SignedHashes>,
+    val isStart2Coin: Boolean,
+) {
+
+    data class SignedHashes(val curve: String, val total: String?)
+}

domain/feedback/src/main/java/com/tangem/domain/feedback/models/PhoneInfo.kt

@@ -0,0 +1,7 @@
+package com.tangem.domain.feedback.models
+
+data class PhoneInfo(
+    val phoneModel: String,
+    val osVersion: String,
+    val appVersion: String,
+)

domain/feedback/src/main/java/com/tangem/domain/feedback/utils/StringBuilderExt.kt

@@ -0,0 +1,5 @@
+package com.tangem.domain.feedback.utils
+
+fun StringBuilder.breakLine(count: Int = 1): StringBuilder = append("\n".repeat(count))
+
+fun StringBuilder.skipLine(): StringBuilder = breakLine(count = 2)

settings.gradle.kts

@@ -138,6 +138,7 @@ include(":domain:transaction")
 include(":domain:analytics")
 include(":domain:visa")
 include(":domain:onboarding")
+include(":domain:feedback")
 // endregion Domain modules
 
 // region Data modules