[wallet] Fix crash when exchange is missing currency

Can happen when exchange info in wallet-core was not yet fully loaded

#7480

2 files changed, 11 insertions, 5 deletions

diff --git a/wallet/src/main/java/net/taler/wallet/exchanges/ExchangeAdapter.kt b/wallet/src/main/java/net/taler/wallet/exchanges/ExchangeAdapter.kt
index 5b0d947..e0cf5be 100644
--- a/wallet/src/main/java/net/taler/wallet/exchanges/ExchangeAdapter.kt
+++ b/wallet/src/main/java/net/taler/wallet/exchanges/ExchangeAdapter.kt
@@ -34,8 +34,9 @@ import net.taler.wallet.exchanges.ExchangeAdapter.ExchangeItemViewHolder
 @Serializable
 data class ExchangeItem(
     val exchangeBaseUrl: String,
-    val currency: String,
-    val paytoUris: List<String>
+    // can be null before exchange info in wallet-core was fully loaded
+    val currency: String? = null,
+    val paytoUris: List<String>,
 ) {
     val name: String get() = cleanExchange(exchangeBaseUrl)
 }
@@ -79,7 +80,11 @@ internal class ExchangeAdapter(
 
         fun bind(item: ExchangeItem) {
             urlView.text = item.name
-            currencyView.text = context.getString(R.string.exchange_list_currency, item.currency)
+            currencyView.text = if (item.currency == null) {
+                context.getString(R.string.settings_version_unknown)
+            } else {
+                context.getString(R.string.exchange_list_currency, item.currency)
+            }
             if (selectOnly) {
                 itemView.setOnClickListener { listener.onExchangeSelected(item) }
                 overflowIcon.visibility = GONE
diff --git a/wallet/src/main/java/net/taler/wallet/withdraw/manual/ManualWithdrawFragment.kt b/wallet/src/main/java/net/taler/wallet/withdraw/manual/ManualWithdrawFragment.kt
index 148b8c0..aae8c95 100644
--- a/wallet/src/main/java/net/taler/wallet/withdraw/manual/ManualWithdrawFragment.kt
+++ b/wallet/src/main/java/net/taler/wallet/withdraw/manual/ManualWithdrawFragment.kt
@@ -67,7 +67,8 @@ class ManualWithdrawFragment : Fragment() {
     }
 
     private fun onCheckFees() {
-        if (ui.amountView.text?.isEmpty() != false) {
+        val currency = exchangeItem.currency
+        if (currency == null || ui.amountView.text?.isEmpty() != false) {
             ui.amountLayout.error = getString(R.string.withdraw_amount_error)
             return
         }
@@ -79,7 +80,7 @@ class ManualWithdrawFragment : Fragment() {
             ui.amountLayout.error = getString(R.string.withdraw_amount_error)
             return
         }
-        val amount = Amount.fromDouble(exchangeItem.currency, value)
+        val amount = Amount.fromDouble(currency, value)
         ui.amountView.hideKeyboard()
 
         withdrawManager.getWithdrawalDetails(exchangeItem.exchangeBaseUrl, amount)