Updated on 2026-08-14

app/build.gradle

@@ -84,6 +84,7 @@ dependencies {
     implementation 'com.squareup.okhttp3:logging-interceptor:3.11.0'
     implementation 'com.skyfishjy.ripplebackground:library:1.0.1'
     implementation 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0'
+    implementation "com.orhanobut:hawk:2.0.1"
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'org.bitcoinj:bitcoinj-parent:0.14.7'
     implementation 'org.bitcoinj:bitcoinj-core:0.14.7'
@@ -93,4 +94,5 @@ dependencies {
     implementation 'io.reactivex.rxjava2:rxjava:2.2.0'
     implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
     implementation 'io.reactivex.rxjava2:rxkotlin:2.3.0'
+
 }

app/src/main/java/com/tangem/App.kt

@@ -8,6 +8,7 @@ import com.tangem.data.local.PendingTransactionsStorage
 import com.tangem.card_android.android.data.Firmwares
 import com.tangem.card_android.android.data.PINStorage
 import com.tangem.card_common.data.Issuer
+import com.tangem.data.dp.PrefsManager
 import com.tangem.di.*
 import com.tangem.server_android.data.LocalStorage
 import java.io.InputStreamReader
@@ -42,6 +43,8 @@ class App : Application() {
         navigatorComponent = buildNavigatorComponent()
         toastHelperComponent = buildToastHelperComponent()
 
+        PrefsManager.getInstance().init(this)
+
         // common init
         if (PINStorage.needInit())
             PINStorage.init(applicationContext)

app/src/main/java/com/tangem/Constant.kt

@@ -7,6 +7,9 @@ object Constant {
     const val FLAVOR_TANGEM_ACCESS = "tangemAccess"
     const val FLAVOR_TANGEM_CARDANO = "tangemCardano"
 
+
+    const val PREF_LAST_WALLET_ADDRESS = "last_wallet_address"
+
     const val URL_TANGEM = "https://play.google.com/store/apps/details?id=com.tangem.wallet"
 
     const val EXTRA_BLOCKCHAIN_DATA = "BLOCKCHAIN_DATA"

app/src/main/java/com/tangem/data/dp/PrefsManager.kt

@@ -0,0 +1,44 @@
+package com.tangem.data.dp
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.SharedPreferences
+
+import com.orhanobut.hawk.Hawk
+import com.tangem.Constant
+
+class PrefsManager {
+    companion object {
+        const val PREF_NAME = "tangem_access"
+        @SuppressLint("StaticFieldLeak")
+        private var instance: PrefsManager? = null
+
+        fun getInstance(): PrefsManager {
+            if (instance == null) {
+                instance = PrefsManager()
+            }
+            return instance as PrefsManager
+        }
+    }
+
+    private lateinit var context: Context
+    private lateinit var preferences: SharedPreferences
+
+    fun init(context: Context) {
+        this.context = context
+        preferences = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
+        Hawk.init(context).build()
+    }
+
+    val lastWalletAddress: String
+        get() = Hawk.get(Constant.PREF_LAST_WALLET_ADDRESS, "")
+
+    fun saveLastWalletAddress(value: String) {
+        Hawk.put(Constant.PREF_LAST_WALLET_ADDRESS, value)
+    }
+
+    fun clearLastWalletAddress() {
+        Hawk.delete(Constant.PREF_LAST_WALLET_ADDRESS)
+    }
+
+}

app/src/tangemCardano/java/com/tangem/ui/PrepareTransactionActivity.kt

@@ -20,6 +20,7 @@ import com.tangem.Constant
 import com.tangem.card_android.android.nfc.NfcLifecycleObserver
 import com.tangem.card_android.android.reader.NfcManager
 import com.tangem.data.Blockchain
+import com.tangem.data.dp.PrefsManager
 import com.tangem.di.Navigator
 import com.tangem.domain.wallet.CoinEngineFactory
 import com.tangem.domain.wallet.TangemContext
@@ -80,6 +81,8 @@ class PrepareTransactionActivity : AppCompatActivity(), NfcAdapter.ReaderCallbac
         // limit number of symbols after comma
         etAmount.filters = engine.amountInputFilters
 
+        etWallet.setText(PrefsManager.getInstance().lastWalletAddress)
+
         // set listeners
         etAmount.setOnEditorActionListener { lv, actionId, _ ->
             if (actionId == EditorInfo.IME_ACTION_DONE) {
@@ -134,9 +137,14 @@ class PrepareTransactionActivity : AppCompatActivity(), NfcAdapter.ReaderCallbac
             intent.putExtra(Constant.EXTRA_AMOUNT, strAmount)
             intent.putExtra(Constant.EXTRA_AMOUNT_CURRENCY, tvCurrency.text.toString())
             startActivityForResult(intent, Constant.REQUEST_CODE_SEND_TRANSACTION__)
+
+            PrefsManager.getInstance().saveLastWalletAddress(etWallet.text.toString())
         }
 
-        ivCamera.setOnClickListener { navigator.showQrScanActivity(this, Constant.REQUEST_CODE_SCAN_QR) }
+        ivCamera.setOnClickListener {
+            navigator.showQrScanActivity(this, Constant.REQUEST_CODE_SCAN_QR)
+            etWallet.text.clear()
+        }
 
         etWallet.setOnTouchListener(OnTouchListener { _, event ->
             if (event.action == MotionEvent.ACTION_UP) {