Improve Send Workflow (#386)

* remove password query on initial spend screen

* report error if send tx fails

* better failed tx alert

app/src/main/java/com/m2049r/xmrwallet/WalletActivity.java

@@ -431,17 +431,7 @@ public class WalletActivity extends BaseActivity implements WalletFragment.Liste
 
     @Override
     public void onSendRequest() {
-        if (needVerifyIdentity) {
-            Helper.promptPassword(WalletActivity.this, getWallet().getName(), true, new Helper.PasswordAction() {
-                @Override
-                public void action(String walletName, String password, boolean fingerprintUsed) {
-                    replaceFragment(new SendFragment(), null, null);
-                    needVerifyIdentity = false;
-                }
-            });
-        } else {
-            replaceFragment(new SendFragment(), null, null);
-        }
+        replaceFragment(new SendFragment(), null, null);
     }
 
     @Override

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendBtcConfirmWizardFragment.java

@@ -216,9 +216,9 @@ public class SendBtcConfirmWizardFragment extends SendWizardFragment implements
     }
 
     @Override
-    public void sendFailed() {
-        Timber.e("SEND FAILED");
+    public void sendFailed(String error) {
         pbProgressSend.setVisibility(View.INVISIBLE);
+        Toast.makeText(getContext(), getString(R.string.status_transaction_failed, error), Toast.LENGTH_LONG).show();
     }
 
     @Override

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendConfirm.java

@@ -19,7 +19,7 @@ package com.m2049r.xmrwallet.fragment.send;
 import com.m2049r.xmrwallet.model.PendingTransaction;
 
 interface SendConfirm {
-    void sendFailed();
+    void sendFailed(String errorText);
 
     void createTransactionFailed(String errorText);
 

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendConfirmWizardFragment.java

@@ -145,17 +145,22 @@ public class SendConfirmWizardFragment extends SendWizardFragment implements Sen
     }
 
     @Override
-    public void sendFailed() {
+    public void sendFailed(String errorText) {
         pbProgressSend.setVisibility(View.INVISIBLE);
+        showAlert(getString(R.string.send_create_tx_error_title), errorText);
     }
 
     @Override
     public void createTransactionFailed(String errorText) {
         hideProgress();
+        showAlert(getString(R.string.send_create_tx_error_title), errorText);
+    }
+
+    private void showAlert(String title, String message) {
         AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
         builder.setCancelable(true).
-                setTitle(getString(R.string.send_create_tx_error_title)).
-                setMessage(errorText).
+                setTitle(title).
+                setMessage(message).
                 create().
                 show();
     }

app/src/main/java/com/m2049r/xmrwallet/fragment/send/SendFragment.java

@@ -534,12 +534,11 @@ public class SendFragment extends Fragment
     public void onSendTransactionFailed(final String error) {
         Timber.d("error=%s", error);
         committedTx = null;
-        Toast.makeText(getContext(), getString(R.string.status_transaction_failed, error), Toast.LENGTH_SHORT).show();
-        enableNavigation();
-        final SendConfirm fragment = getSendConfirm();
-        if (fragment != null) {
-            fragment.sendFailed();
+        final SendConfirm confirm = getSendConfirm();
+        if (confirm != null) {
+            confirm.sendFailed(getString(R.string.status_transaction_failed, error));
         }
+        enableNavigation();
     }
 
     @Override

app/src/main/java/com/m2049r/xmrwallet/service/WalletService.java

@@ -340,19 +340,21 @@ public class WalletService extends Service {
                         Wallet myWallet = getWallet();
                         Timber.d("SEND TX for wallet: %s", myWallet.getName());
                         PendingTransaction pendingTransaction = myWallet.getPendingTransaction();
-                        if ((pendingTransaction == null)
-                                || (pendingTransaction.getStatus() != PendingTransaction.Status.Status_Ok)) {
+                        if (pendingTransaction == null) {
+                            throw new IllegalArgumentException("PendingTransaction is null"); // die
+                        }
+                        if (pendingTransaction.getStatus() != PendingTransaction.Status.Status_Ok) {
                             Timber.e("PendingTransaction is %s", pendingTransaction.getStatus());
                             final String error = pendingTransaction.getErrorString();
                             myWallet.disposePendingTransaction(); // it's broken anyway
                             if (observer != null) observer.onSendTransactionFailed(error);
                             return;
                         }
-                        final String txid = pendingTransaction.getFirstTxId();
+                        final String txid = pendingTransaction.getFirstTxId(); // tx ids vanish after commit()!
                         boolean success = pendingTransaction.commit("", true);
-                        myWallet.disposePendingTransaction();
-                        if (observer != null) observer.onTransactionSent(txid);
                         if (success) {
+                            myWallet.disposePendingTransaction();
+                            if (observer != null) observer.onTransactionSent(txid);
                             String notes = extras.getString(REQUEST_CMD_SEND_NOTES);
                             if ((notes != null) && (!notes.isEmpty())) {
                                 myWallet.setUserNote(txid, notes);
@@ -364,6 +366,11 @@ public class WalletService extends Service {
                             }
                             if (observer != null) observer.onWalletStored(rc);
                             listener.updated = true;
+                        } else {
+                            final String error = pendingTransaction.getErrorString();
+                            myWallet.disposePendingTransaction();
+                            if (observer != null) observer.onSendTransactionFailed(error);
+                            return;
                         }
                     } else if (cmd.equals(REQUEST_CMD_SETNOTE)) {
                         Wallet myWallet = getWallet();