From c4e700aa1885c13116eac860afe6e09db9c7af7b 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 | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/starknet-core/src/crypto.rs b/starknet-core/src/crypto.rs
index e703fc24..41af08e8 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: &[FieldElement]) -> FieldElement {
+pub fn compute_hash_on_elements<'a, ESI, II>(data: II) -> FieldElement
+where
+    ESI: ExactSizeIterator<Item = &'a FieldElement>,
+    II: IntoIterator<IntoIter = ESI>,
+{
     let mut current_hash = FieldElement::ZERO;
+    let iter = data.into_iter();
+    let data_len = FieldElement::from(iter.len());
 
-    for item in data.iter() {
+    for item in iter {
         current_hash = pedersen_hash(&current_hash, item);
     }
 
-    let data_len = FieldElement::from(data.len());
     pedersen_hash(&current_hash, &data_len)
 }