Merge pull request #450 from cypherstack/fix-epiccash-send-all

Fix Epiccash sendAll not enough funds error

lib/services/coins/epiccash/epiccash_wallet.dart

@@ -862,6 +862,9 @@ class EpicCashWallet extends CoinServiceAPI
       Map<String, dynamic>? args}) async {
     try {
       int realfee = await nativeFee(satoshiAmount);
+      if (balance.spendable == satoshiAmount) {
+        satoshiAmount = balance.spendable - realfee;
+      }
 
       Map<String, dynamic> txData = {
         "fee": realfee,
@@ -906,6 +909,53 @@ class EpicCashWallet extends CoinServiceAPI
       });
       debugPrint(transactionFees);
       dynamic decodeData;
+
+      final available = balance.spendable;
+
+      if (available == satoshiAmount) {
+        if (transactionFees!.contains("Required")) {
+          var splits = transactionFees!.split(" ");
+          Decimal required = Decimal.zero;
+          Decimal available = Decimal.zero;
+          for (int i = 0; i < splits.length; i++) {
+            var word = splits[i];
+            if (word == "Required:") {
+              required = Decimal.parse(splits[i + 1].replaceAll(",", ""));
+            } else if (word == "Available:") {
+              available = Decimal.parse(splits[i + 1].replaceAll(",", ""));
+            }
+          }
+          int largestSatoshiFee =
+              ((required - available) * Decimal.fromInt(100000000))
+                  .toBigInt()
+                  .toInt();
+          var amountSending = satoshiAmount - largestSatoshiFee;
+
+          //Get fees for this new amount
+          await m.protect(() async {
+            ReceivePort receivePort = await getIsolate({
+              "function": "getTransactionFees",
+              "wallet": wallet!,
+              "amount": amountSending,
+              "minimumConfirmations": MINIMUM_CONFIRMATIONS,
+            }, name: walletName);
+
+            var message = await receivePort.first;
+            if (message is String) {
+              Logging.instance
+                  .log("this is a string $message", level: LogLevel.Error);
+              stop(receivePort);
+              throw Exception("getTransactionFees isolate failed");
+            }
+            stop(receivePort);
+            Logging.instance.log('Closing getTransactionFees!\n  $message',
+                level: LogLevel.Info);
+            // return message;
+            transactionFees = message['result'] as String;
+          });
+        }
+        decodeData = json.decode(transactionFees!);
+      } else {
         try {
           decodeData = json.decode(transactionFees!);
         } catch (e) {
@@ -934,6 +984,7 @@ class EpicCashWallet extends CoinServiceAPI
           }
           rethrow;
         }
+      }
 
       //TODO: first problem
       int realfee = 0;
@@ -1799,7 +1850,7 @@ class EpicCashWallet extends CoinServiceAPI
     //     final chunk = {
     //       "timestamp": txTimeArray[0],
     //       "transactions": [txObject],
-    //     };
+    //     };sendAll
     //
     //     // result["dateTimeChunks"].
     //     result["dateTimeChunks"].add(chunk);