fix:refine example nonce

Signed-off-by: grapebaba <281165273@qq.com>

Author: GrapeBaBa

example/bundle/RpcMevSimBundle.java

@@ -73,7 +73,7 @@ public static void main(String[] args) throws IOException, ExecutionException, I
                 .getTransactionCount();
         final String to = "0x56EdF679B0C80D528E17c5Ffe514dc9a1b254b9c";
         RawTransaction rawTransaction = RawTransaction.createEtherTransaction(
-                nonce.add(BigInteger.ONE),
+                nonce,
                 web3j.ethGasPrice().send().getGasPrice(),
                 DefaultGasProvider.GAS_LIMIT,
                 to,

src/main/java/net/flashbots/provider/HttpProvider.java

@@ -163,6 +163,10 @@ public <T> CompletableFuture<T> send(
                     return future;
                 })
                 .exceptionallyCompose(throwable -> {
+                    if (throwable instanceof MevShareApiException) {
+                        future.completeExceptionally(throwable);
+                        return future;
+                    }
                     MevShareApiException e = new MevShareApiException(throwable);
                     future.completeExceptionally(e);
                     return future;