From b56bbf23a0ac7cfd94610d3ffca576cc877e0670 Mon Sep 17 00:00:00 2001
From: Tyera Eulberg <tyera@solana.com>
Date: Tue, 16 Feb 2021 10:26:59 -0700
Subject: [PATCH] Clean nonce

---
 sdk/src/nonce_keyed_account.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sdk/src/nonce_keyed_account.rs b/sdk/src/nonce_keyed_account.rs
index 8a4f8b2840..17761b2986 100644
--- a/sdk/src/nonce_keyed_account.rs
+++ b/sdk/src/nonce_keyed_account.rs
@@ -3,7 +3,7 @@ use crate::{
     nonce_account::create_account,
 };
 use solana_program::{
-    instruction::InstructionError,
+    instruction::{checked_add, InstructionError},
     nonce::{self, state::Versions, State},
     pubkey::Pubkey,
     system_instruction::NonceError,
@@ -93,7 +93,7 @@ impl<'a> NonceKeyedAccount for KeyedAccount<'a> {
                     self.set_state(&Versions::new_current(State::Uninitialized))?;
                 } else {
                     let min_balance = rent.minimum_balance(self.data_len()?);
-                    if lamports + min_balance > self.lamports()? {
+                    if checked_add(lamports, min_balance)? > self.lamports()? {
                         return Err(InstructionError::InsufficientFunds);
                     }
                 }