From ef5484eff9ffea09720c678c54b49ff5b962e9b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timoth=C3=A9e=20Delabrouille?=
 <timothee.delabrouille@gmail.com>
Date: Mon, 3 Jun 2024 12:20:41 +0200
Subject: [PATCH] feat: compute_hash_on_elements takes ExactSizeIterator

---
 starknet-core/src/crypto.rs | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/starknet-core/src/crypto.rs b/starknet-core/src/crypto.rs
index 634faab9..1977f4da 100644
--- a/starknet-core/src/crypto.rs
+++ b/starknet-core/src/crypto.rs
@@ -46,14 +46,19 @@ mod errors {
 }
 pub use errors::{EcdsaSignError, EcdsaVerifyError};
 
-pub fn compute_hash_on_elements(data: &[Felt]) -> Felt {
+pub fn compute_hash_on_elements<'a, ESI, II>(data: II) -> Felt
+where
+    ESI: ExactSizeIterator<Item = &'a Felt>,
+    II: IntoIterator<IntoIter = ESI>,
+{
     let mut current_hash = Felt::ZERO;
+    let data_iter = data.into_iter();
+    let data_len = Felt::from(data_iter.len());
 
-    for item in data.iter() {
-        current_hash = pedersen_hash(&current_hash, item);
+    for elem in data_iter {
+        current_hash = pedersen_hash(&current_hash, elem);
     }
 
-    let data_len = Felt::from(data.len());
     pedersen_hash(&current_hash, &data_len)
 }