From 5fbac6d6f404bfe4aa132694c58f84d7be02b5cc Mon Sep 17 00:00:00 2001
From: maciektr <maciej.tratnowiecki@swmansion.com>
Date: Mon, 4 Mar 2024 11:34:59 +0100
Subject: [PATCH] Update scarb new/init hello world Cairo code

---
 examples/hello_world/src/lib.cairo           | 16 +++++++---------
 extensions/scarb-cairo-run/tests/examples.rs |  2 +-
 scarb/src/ops/new.rs                         | 16 +++++++---------
 3 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/examples/hello_world/src/lib.cairo b/examples/hello_world/src/lib.cairo
index 6d3ce3c14..c55f19bdf 100644
--- a/examples/hello_world/src/lib.cairo
+++ b/examples/hello_world/src/lib.cairo
@@ -1,19 +1,17 @@
-fn main() -> felt252 {
+fn main() -> u32 {
     fib(16)
 }
 
-fn fib(mut n: felt252) -> felt252 {
-    let mut a: felt252 = 0;
-    let mut b: felt252 = 1;
-    loop {
-        if n == 0 {
-            break a;
-        }
+fn fib(mut n: u32) -> u32 {
+    let mut a: u32 = 0;
+    let mut b: u32 = 1;
+    while n != 0 {
         n = n - 1;
         let temp = b;
         b = a + b;
         a = temp;
-    }
+    };
+    a
 }
 
 #[cfg(test)]
diff --git a/extensions/scarb-cairo-run/tests/examples.rs b/extensions/scarb-cairo-run/tests/examples.rs
index c68c5667a..3fd69252d 100644
--- a/extensions/scarb-cairo-run/tests/examples.rs
+++ b/extensions/scarb-cairo-run/tests/examples.rs
@@ -97,7 +97,7 @@ fn can_limit_gas() {
                 Finished release target(s) in [..]
                  Running hello_world
             Run completed successfully, returning [987]
-            Remaining gas: 68340
+            Remaining gas: 50760
         "#});
 }
 
diff --git a/scarb/src/ops/new.rs b/scarb/src/ops/new.rs
index e9e1602d2..e2003a264 100644
--- a/scarb/src/ops/new.rs
+++ b/scarb/src/ops/new.rs
@@ -156,22 +156,20 @@ fn mk(
         fsx::write(
             source_path,
             indoc! {r#"
-                fn main() -> felt252 {
+                fn main() -> u32 {
                     fib(16)
                 }
 
-                fn fib(mut n: felt252) -> felt252 {
-                    let mut a: felt252 = 0;
-                    let mut b: felt252 = 1;
-                    loop {
-                        if n == 0 {
-                            break a;
-                        }
+                fn fib(mut n: u32) -> u32 {
+                    let mut a: u32 = 0;
+                    let mut b: u32 = 1;
+                    while n != 0 {
                         n = n - 1;
                         let temp = b;
                         b = a + b;
                         a = temp;
-                    }
+                    };
+                    a
                 }
 
                 #[cfg(test)]