Updated on 2026-08-14

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/ui/fee/SendSpeedSelector.kt

@@ -10,18 +10,23 @@ import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.text.ClickableText
 import androidx.compose.material3.Icon
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.SpanStyle
 import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.buildAnnotatedString
 import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.tooling.preview.Preview
 import com.tangem.blockchain.common.Amount
 import com.tangem.blockchain.common.transaction.Fee
@@ -43,7 +48,6 @@ import com.tangem.features.send.impl.presentation.state.SendStates
 import com.tangem.features.send.impl.presentation.state.fee.FeeSelectorState
 import com.tangem.features.send.impl.presentation.state.fee.FeeType
 import com.tangem.features.send.impl.presentation.state.fee.SendFeeNotification
-import com.tangem.features.send.impl.presentation.ui.common.FooterContainer
 import com.tangem.features.send.impl.presentation.viewmodel.SendClickIntents
 import java.math.BigDecimal
 
@@ -60,10 +64,7 @@ internal fun SendSpeedSelector(
     clickIntents: SendClickIntents,
     modifier: Modifier = Modifier,
 ) {
-    FooterContainer(
-        footer = stringResource(R.string.common_fee_selector_footer),
-        modifier = modifier,
-    ) {
+    Column(modifier = modifier) {
         Column(
             modifier = Modifier
                 .fillMaxWidth()
@@ -147,9 +148,43 @@ internal fun SendSpeedSelector(
                 }
             }
         }
+        FooterText(clickIntents::onReadMoreClick)
     }
 }
 
+@Composable
+private fun FooterText(onReadMoreClick: () -> Unit) {
+    val linkText = stringResource(R.string.common_fee_selector_link_description)
+    val fullString = stringResource(R.string.common_fee_selector_footer, linkText)
+    val linkTextPosition = fullString.length - linkText.length
+    val defaultStyle = TangemTheme.colors.text.tertiary
+    val linkStyle = TangemTheme.colors.text.accent
+    val annotatedString = remember(defaultStyle, linkStyle) {
+        buildAnnotatedString {
+            withStyle(SpanStyle(defaultStyle)) {
+                append(fullString.substring(0, linkTextPosition))
+            }
+            withStyle(SpanStyle(linkStyle)) {
+                append(fullString.substring(linkTextPosition, fullString.length))
+            }
+        }
+    }
+
+    val click = { i: Int ->
+        val readMoreStyle = requireNotNull(annotatedString.spanStyles.getOrNull(1))
+        if (i in readMoreStyle.start..readMoreStyle.end) {
+            onReadMoreClick()
+        }
+    }
+
+    ClickableText(
+        text = annotatedString,
+        style = TangemTheme.typography.caption2.copy(textAlign = TextAlign.Start),
+        modifier = Modifier.padding(top = TangemTheme.dimens.spacing8),
+        onClick = click,
+    )
+}
+
 // todo remove after refactoring [REDACTED_JIRA]
 private fun getCryptoReference(amount: Amount, isFeeApproximate: Boolean) = combinedReference(
     if (isFeeApproximate) stringReference("$CAN_BE_LOWER_SIGN ") else TextReference.EMPTY,

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/viewmodel/SendClickIntents.kt

@@ -44,6 +44,8 @@ internal interface SendClickIntents {
     fun onCustomFeeValueChange(index: Int, value: String)
 
     fun onSubtractSelect(value: Boolean)
+
+    fun onReadMoreClick()
     // endregion
 
     // region Send

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/viewmodel/SendViewModel.kt

@@ -57,6 +57,7 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.*
 import kotlinx.coroutines.flow.*
 import timber.log.Timber
+import java.util.Locale
 import javax.inject.Inject
 import kotlin.properties.Delegates
 
@@ -524,6 +525,16 @@ internal class SendViewModel @Inject constructor(
         updateFeeNotifications()
     }
 
+    override fun onReadMoreClick() {
+        val locale = if (Locale.getDefault().language == RU_LOCALE) RU_LOCALE else EN_LOCALE
+        val url = buildString {
+            append(FEE_READ_MORE_URL_FIRST_PART)
+            append(locale)
+            append(FEE_READ_MORE_URL_SECOND_PART)
+        }
+        innerRouter.openUrl(url)
+    }
+
     private fun loadFee() {
         viewModelScope.launch(dispatchers.main) {
             uiState = feeStateFactory.onFeeOnLoadingState()
@@ -723,5 +734,10 @@ internal class SendViewModel @Inject constructor(
     companion object {
         private const val CHECK_FEE_UPDATE_DELAY = 60_000L
         private const val BALANCE_UPDATE_DELAY = 10_000L
+
+        private const val RU_LOCALE = "ru"
+        private const val EN_LOCALE = "en"
+        private const val FEE_READ_MORE_URL_FIRST_PART = "https://tangem.com/"
+        private const val FEE_READ_MORE_URL_SECOND_PART = "/blog/post/what-is-a-transaction-fee-and-why-do-we-need-it/"
     }
 }