feat: comptime deriving generators in macros (#9195)

aztec/src/macros/notes/mod.nr

@@ -1,8 +1,8 @@
-use crate::note::{note_getter_options::PropertySelector, note_header::NoteHeader};
+use crate::{note::{note_getter_options::PropertySelector, note_header::NoteHeader}, prelude::Point};
 use protocol_types::meta::{flatten_to_fields, pack_from_fields};
 use std::{
     collections::umap::UHashMap,
-    hash::{BuildHasherDefault, poseidon2::Poseidon2Hasher},
+    hash::{BuildHasherDefault, derive_generators, poseidon2::Poseidon2Hasher},
     meta::{typ::fresh_type_variable, type_of, unquote},
 };
 
@@ -310,16 +310,24 @@ comptime fn generate_multi_scalar_mul(
     let mut scalars_list = &[];
     let mut args_list = &[];
     let mut aux_vars_list = &[];
-    // TODO(#8648): Generate generators at comptime instead of importing here.
     for i in 0..indexed_fields.len() {
         let (field_name, typ, index) = indexed_fields[i];
         let start_generator_index = index + 1;
         let (flattened_field, aux_vars) = flatten_to_fields(field_name, typ, &[]);
         for j in 0..flattened_field.len() {
             let flattened_as_field = flattened_field[j];
             let generator_index = start_generator_index + j;
-            generators_list = generators_list.push_back(f"aztec::generators::Ga{generator_index}"
-                .quoted_contents());
+
+            let generators: [Point; 1] =
+                derive_generators("aztec_nr_generators".as_bytes(), generator_index);
+            let generator_x = generators[0].x;
+            let generator_y = generators[0].y;
+
+            generators_list = generators_list.push_back(
+                quote {
+                aztec::protocol_types::point::Point { x: $generator_x, y: $generator_y, is_infinite: false }
+                },
+            );
             scalars_list =
                 scalars_list.push_back(quote { std::hash::from_field_unsafe($flattened_as_field) });
         }