feat: calculate FunctionSelectors and EventSelectors during comptime

Author: TomAFrench

noir-projects/aztec-nr/authwit/src/auth.nr

@@ -219,8 +219,9 @@ pub fn assert_inner_hash_valid_authwit(context: &mut PrivateContext, on_behalf_o
     // We perform a static call here and not a standard one to ensure that the account contract cannot re-enter.
     let result: Field = context.static_call_private_function(
         on_behalf_of,
-        FunctionSelector::from_signature("verify_private_authwit(Field)"),
-        [inner_hash]
+        comptime {
+        FunctionSelector::from_signature("verify_private_authwit(Field)")
+    }, [inner_hash]
     ).unpack_into();
     assert(result == IS_VALID_SELECTOR, "Message not authorized by account");
     // Compute the nullifier, similar computation to the outer hash, but without the chain_id and version.
@@ -263,7 +264,7 @@ pub fn assert_current_call_valid_authwit_public(context: &mut PublicContext, on_
 pub fn assert_inner_hash_valid_authwit_public(context: &mut PublicContext, on_behalf_of: AztecAddress, inner_hash: Field) {
     let result: Field = context.call_public_function(
         CANONICAL_AUTH_REGISTRY_ADDRESS,
-        FunctionSelector::from_signature("consume((Field),Field)"),
+        comptime { FunctionSelector::from_signature("consume((Field),Field)") },
         [on_behalf_of.to_field(), inner_hash].as_slice(),
         GasOpts::default()
     ).deserialize_into();
@@ -357,7 +358,7 @@ pub fn compute_authwit_message_hash(consumer: AztecAddress, chain_id: Field, ver
 pub fn set_authorized(context: &mut PublicContext, message_hash: Field, authorize: bool) {
     context.call_public_function(
         CANONICAL_AUTH_REGISTRY_ADDRESS,
-        FunctionSelector::from_signature("set_authorized(Field,bool)"),
+        comptime { FunctionSelector::from_signature("set_authorized(Field,bool)") },
         [message_hash, authorize as Field].as_slice(),
         GasOpts::default()
     ).assert_empty();
@@ -373,7 +374,7 @@ pub fn set_authorized(context: &mut PublicContext, message_hash: Field, authoriz
 pub fn set_reject_all(context: &mut PublicContext, reject: bool) {
     context.call_public_function(
         CANONICAL_AUTH_REGISTRY_ADDRESS,
-        FunctionSelector::from_signature("set_reject_all(bool)"),
+        comptime { FunctionSelector::from_signature("set_reject_all(bool)") },
         [context.this_address().to_field(), reject as Field].as_slice(),
         GasOpts::default()
     ).assert_empty();

noir-projects/aztec-nr/aztec/src/encrypted_logs/incoming_body.nr

@@ -177,7 +177,7 @@ mod test {
 
     impl EventInterface<TEST_EVENT_BYTES_LEN, TEST_EVENT_BYTES_LEN_WITHOUT_RANDOMNESS> for TestEvent {
         fn get_event_type_id() -> EventSelector {
-            EventSelector::from_signature("TestEvent(Field,Field,Field)")
+            comptime { EventSelector::from_signature("TestEvent(Field,Field,Field)") }
         }
 
         fn private_to_be_bytes(self, randomness: Field) -> [u8; TEST_EVENT_BYTES_LEN] {

noir-projects/noir-contracts/contracts/avm_test_contract/src/main.nr

@@ -341,7 +341,9 @@ contract AvmTest {
     #[aztec(public)]
     fn check_selector() {
         assert(
-            context.selector() == FunctionSelector::from_signature("check_selector()"), "Unexpected selector!"
+            context.selector() == comptime {
+                FunctionSelector::from_signature("check_selector()")
+            }, "Unexpected selector!"
         );
     }
 

noir-projects/noir-contracts/contracts/fpc_contract/src/main.nr

@@ -28,7 +28,9 @@ contract FPC {
         // FPC::at(context.this_address()).pay_refund_with_shielded_rebate(amount, asset, secret_hash).set_public_teardown_function(&mut context);
         context.set_public_teardown_function(
             context.this_address(),
-            FunctionSelector::from_signature("pay_refund_with_shielded_rebate(Field,(Field),Field)"),
+            comptime {
+            FunctionSelector::from_signature("pay_refund_with_shielded_rebate(Field,(Field),Field)")
+        },
             [amount, asset.to_field(), secret_hash]
         );
     }
@@ -41,7 +43,9 @@ contract FPC {
         // FPC::at(context.this_address()).pay_refund(context.msg_sender(), amount, asset).set_public_teardown_function(&mut context);
         context.set_public_teardown_function(
             context.this_address(),
-            FunctionSelector::from_signature("pay_refund((Field),Field,(Field))"),
+            comptime {
+            FunctionSelector::from_signature("pay_refund((Field),Field,(Field))")
+        },
             [context.msg_sender().to_field(), amount, asset.to_field()]
         );
     }

noir-projects/noir-contracts/contracts/parent_contract/src/main.nr

@@ -56,15 +56,17 @@ contract Parent {
         context.call_public_function(target_contract, target_selector, [target_value]);
     }
 
-    // Private function that enqueues two calls to a child contract: 
+    // Private function that enqueues two calls to a child contract:
     // - one through a nested call to enqueue_call_to_child with value 10,
     // - followed by one issued directly from this function with value 20.
     #[aztec(private)]
     fn enqueue_calls_to_child_with_nested_first(
         target_contract: AztecAddress,
         target_selector: FunctionSelector
     ) {
-        let enqueue_call_to_child_selector = FunctionSelector::from_signature("enqueue_call_to_child((Field),(u32),Field)");
+        let enqueue_call_to_child_selector = comptime {
+            FunctionSelector::from_signature("enqueue_call_to_child((Field),(u32),Field)")
+        };
         let _ret = context.call_private_function(
             context.this_address(),
             enqueue_call_to_child_selector,
@@ -73,7 +75,7 @@ contract Parent {
         context.call_public_function(target_contract, target_selector, [20]);
     }
 
-    // Private function that enqueues two calls to a child contract: 
+    // Private function that enqueues two calls to a child contract:
     // - one issued directly from this function with value 20,
     // - followed by one through a nested call to enqueue_call_to_child with value 10.
     #[aztec(private)]
@@ -82,7 +84,9 @@ contract Parent {
         target_selector: FunctionSelector
     ) {
         context.call_public_function(target_contract, target_selector, [20]);
-        let enqueue_call_to_child_selector = FunctionSelector::from_signature("enqueue_call_to_child((Field),(u32),Field)");
+        let enqueue_call_to_child_selector = comptime {
+            FunctionSelector::from_signature("enqueue_call_to_child((Field),(u32),Field)")
+        };
         let _ret = context.call_private_function(
             context.this_address(),
             enqueue_call_to_child_selector,
@@ -110,7 +114,9 @@ contract Parent {
         target_selector: FunctionSelector,
         target_value: Field
     ) {
-        let pub_entry_point_selector = FunctionSelector::from_signature("pub_entry_point((Field),(u32),Field)");
+        let pub_entry_point_selector = comptime {
+            FunctionSelector::from_signature("pub_entry_point((Field),(u32),Field)")
+        };
         let this_address = context.this_address();
         let _void = context.call_public_function(
             this_address,
@@ -126,7 +132,9 @@ contract Parent {
         target_selector: FunctionSelector,
         target_value: Field
     ) {
-        let pub_entry_point_selector = FunctionSelector::from_signature("pub_entry_point((Field),(u32),Field)");
+        let pub_entry_point_selector = comptime {
+            FunctionSelector::from_signature("pub_entry_point((Field),(u32),Field)")
+        };
         let this_address = context.this_address();
 
         context.call_public_function(
@@ -265,7 +273,9 @@ contract Parent {
         let value_to_set = 7;
         let parent_private_set_call_interface = Parent::interface().private_call(
             child_contract_address,
-            FunctionSelector::from_signature("private_set_value(Field,(Field))"),
+            comptime {
+            FunctionSelector::from_signature("private_set_value(Field,(Field))")
+        },
             [value_to_set, owner.to_field()]
         );
         let result: Field = env.call_private(parent_private_set_call_interface);
@@ -282,7 +292,9 @@ contract Parent {
         // Get value from child through parent
         let parent_private_get_call_interface = Parent::interface().private_call(
             child_contract_address,
-            FunctionSelector::from_signature("private_get_value(Field,(Field))"),
+            comptime {
+            FunctionSelector::from_signature("private_get_value(Field,(Field))")
+        },
             [7, owner.to_field()]
         );
         let read_result: Field = env.call_private(parent_private_get_call_interface);

noir-projects/noir-contracts/contracts/test_contract/src/main.nr

@@ -213,7 +213,9 @@ contract Test {
     fn test_setting_teardown() {
         context.set_public_teardown_function(
             context.this_address(),
-            FunctionSelector::from_signature("dummy_public_call()"),
+            comptime {
+            FunctionSelector::from_signature("dummy_public_call()")
+        },
             []
         );
     }

noir-projects/noir-contracts/contracts/token_contract/src/main.nr

@@ -572,7 +572,9 @@ contract Token {
         // function has access to the final transaction fee, which is needed to compute the actual refund amount.
         context.set_public_teardown_function(
             context.this_address(),
-            FunctionSelector::from_signature("complete_refund(((Field,Field,bool)),((Field,Field,bool)),Field)"),
+            comptime {
+            FunctionSelector::from_signature("complete_refund(((Field,Field,bool)),((Field,Field,bool)),Field)")
+        },
             [
             fee_payer_point.inner.x, fee_payer_point.inner.y, fee_payer_point.inner.is_infinite as Field, user_point.inner.x, user_point.inner.y, user_point.inner.is_infinite as Field, funded_amount
         ]

noir/noir-repo/aztec_macros/src/transforms/events.rs

@@ -230,7 +230,7 @@ fn generate_fn_get_event_type_id(
     let function_source = format!(
         "
         fn get_event_type_id() -> dep::aztec::protocol_types::abis::event_selector::EventSelector {{
-           dep::aztec::protocol_types::abis::event_selector::EventSelector::from_signature(\"{event_type}({from_signature_input})\")
+           comptime {{ dep::aztec::protocol_types::abis::event_selector::EventSelector::from_signature(\"{event_type}({from_signature_input})\") }}
     }}
     ",
     )

noir/noir-repo/tooling/nargo_fmt/tests/expected/contract.nr

@@ -1,6 +1,6 @@
-// Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 
-// Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 
-// Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. 
+// Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+// Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+// Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
 // Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
 contract Benchmarking {
     use aztec::protocol_types::abis::function_selector::FunctionSelector;
@@ -63,8 +63,9 @@ contract Benchmarking {
         storage.balances.at(owner).write(current + value);
         let _callStackItem1 = context.call_public_function(
             context.this_address(),
-            FunctionSelector::from_signature("broadcast(Field)"),
-            [owner]
+            comptime {
+            FunctionSelector::from_signature("broadcast(Field)")
+        }, [owner]
         );
     }
 
@@ -75,5 +76,5 @@ contract Benchmarking {
     }
 }
 
-// Uses the token bridge contract, which tells which input token we need to talk to and handles the exit funds to L1 
+// Uses the token bridge contract, which tells which input token we need to talk to and handles the exit funds to L1
 contract Uniswap {}

noir/noir-repo/tooling/nargo_fmt/tests/input/contract.nr

@@ -1,6 +1,6 @@
-// Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 
-// Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 
-// Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. 
+// Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+// Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+// Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
 // Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
 contract Benchmarking {
     use aztec::protocol_types::abis::function_selector::FunctionSelector;
@@ -63,8 +63,9 @@ contract Benchmarking {
         storage.balances.at(owner).write(current + value);
         let _callStackItem1 = context.call_public_function(
             context.this_address(),
-            FunctionSelector::from_signature("broadcast(Field)"),
-            [owner]
+            comptime {
+            FunctionSelector::from_signature("broadcast(Field)")
+        }, [owner]
         );
     }
 
@@ -75,5 +76,5 @@ contract Benchmarking {
     }
 }
 
-// Uses the token bridge contract, which tells which input token we need to talk to and handles the exit funds to L1 
+// Uses the token bridge contract, which tells which input token we need to talk to and handles the exit funds to L1
 contract Uniswap {}