From a888f2f5164ea98c4c59cf5f9ef3f29eaeb28435 Mon Sep 17 00:00:00 2001
From: Trent Nelson <trent@solana.com>
Date: Wed, 29 Jul 2020 20:07:12 -0600
Subject: [PATCH] Reject TXs sent via RPC with no signatures

---
 core/src/rpc.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/src/rpc.rs b/core/src/rpc.rs
index 464765f23f..2ba4ede1b5 100644
--- a/core/src/rpc.rs
+++ b/core/src/rpc.rs
@@ -1401,6 +1401,9 @@ fn _send_transaction(
     wire_transaction: Vec<u8>,
     last_valid_slot: Slot,
 ) -> Result<String> {
+    if transaction.signatures.is_empty() {
+        return Err(RpcCustomError::SendTransactionIsNotSigned.into());
+    }
     let signature = transaction.signatures[0];
     let transaction_info = TransactionInfo::new(signature, wire_transaction, last_valid_slot);
     meta.transaction_sender