feat(elements): refactor annex iteration to use iter_mut instead of index

Author: stringhandler

src/jet/elements/c_env.rs

@@ -156,18 +156,17 @@ pub(super) fn new_tx(
 
     let txid = tx.txid();
     let tx_data = new_tx_data(tx, in_utxos);
-    for (((n, inp), in_utxo), inp_data) in tx
-        .input
-        .iter()
-        .enumerate()
+    for (((raw_annex, inp), in_utxo), inp_data) in raw_annexes
+        .iter_mut()
+        .zip(tx.input.iter())
         .zip(in_utxos.iter())
         .zip(tx_data.inputs.iter())
     {
-        raw_annexes[n] = inp_data
+        *raw_annex = inp_data
             .annex
             .as_ref()
             .map(|annex| c_elements::CRawBuffer::new(annex));
-        let annex_ptr = raw_annexes[n]
+        let annex_ptr = raw_annex
             .as_ref()
             .map_or(core::ptr::null(), |b| b as *const _);
         let res = new_raw_input(inp, in_utxo, inp_data, annex_ptr);