From 2569460880ee16db43b1cd4efb39bc4e5dbb7376 Mon Sep 17 00:00:00 2001
From: Dmytro Kozhevin <dmytro@stellar.org>
Date: Tue, 19 Dec 2023 21:44:37 -0500
Subject: [PATCH] Improve error for missing signatures. (#1306)

### What

Improve error for missing signatures.

### Why

[TODO: Why this change is being made. Include any context required to
understand the why.]

### Known limitations

[TODO or N/A]
---
 soroban-env-host/src/builtin_contracts/account_contract.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/soroban-env-host/src/builtin_contracts/account_contract.rs b/soroban-env-host/src/builtin_contracts/account_contract.rs
index f03dec402..d79e6a477 100644
--- a/soroban-env-host/src/builtin_contracts/account_contract.rs
+++ b/soroban-env-host/src/builtin_contracts/account_contract.rs
@@ -160,6 +160,13 @@ pub(crate) fn check_account_authentication(
             len
         ));
     }
+    if len == 0 {
+        return Err(host.error(
+            ContractError::AuthenticationError.into(),
+            "no account signatures found",
+            &[],
+        ));
+    }
     let payload_obj = host.bytes_new_from_slice(payload)?;
     let account = host.load_account(account_id)?;
     let mut prev_pk: Option<BytesN<32>> = None;