diff --git a/noir-projects/aztec-nr/aztec/src/context/private_context.nr b/noir-projects/aztec-nr/aztec/src/context/private_context.nr
index ce7987cf015..9cfe1bc834c 100644
--- a/noir-projects/aztec-nr/aztec/src/context/private_context.nr
+++ b/noir-projects/aztec-nr/aztec/src/context/private_context.nr
@@ -3,8 +3,7 @@ use crate::{
     keys::getters::get_nullifier_keys, messaging::process_l1_to_l2_message,
     hash::{hash_args_array, ArgsHasher, compute_encrypted_log_hash, compute_unencrypted_log_hash},
     oracle::{
-    nullifier_keys::NullifierKeys, arguments, returns,
-    call_private_function::call_private_function_internal, header::get_header_at,
+    arguments, returns, call_private_function::call_private_function_internal, header::get_header_at,
     logs::emit_encrypted_log, logs_traits::{LensForEncryptedLog, ToBytesForUnencryptedLog},
     enqueue_public_function_call::{
     enqueue_public_function_call_internal, set_public_teardown_function_call_internal,
@@ -69,7 +68,7 @@ struct PrivateContext {
     encrypted_log_preimages_length: Field,
     unencrypted_log_preimages_length: Field,
 
-    nullifier_key: Option<NullifierKeys>,
+    nullifier_key: Option<NullifierKeyValidationRequest>,
 }
 
 impl ContextInterface for PrivateContext {
@@ -205,7 +204,7 @@ impl PrivateContext {
 
     pub fn request_nsk_app(&mut self, npk_m_hash: Field) -> Field {
         // A value of empty nullifier keys will fail the key validation request.
-        let cached_nullifier_keys = self.nullifier_key.unwrap_or(NullifierKeys::empty());
+        let cached_nullifier_keys = self.nullifier_key.unwrap_or(NullifierKeyValidationRequest::empty());
 
         let nullifier_keys = if cached_nullifier_keys.master_nullifier_public_key.hash() == npk_m_hash {
             cached_nullifier_keys
diff --git a/noir-projects/aztec-nr/aztec/src/keys/getters.nr b/noir-projects/aztec-nr/aztec/src/keys/getters.nr
index 1759d3a9e57..ad7c7275920 100644
--- a/noir-projects/aztec-nr/aztec/src/keys/getters.nr
+++ b/noir-projects/aztec-nr/aztec/src/keys/getters.nr
@@ -1,9 +1,12 @@
-use dep::protocol_types::{address::AztecAddress, constants::CANONICAL_KEY_REGISTRY_ADDRESS, grumpkin_point::GrumpkinPoint};
+use dep::protocol_types::{
+    abis::nullifier_key_validation_request::NullifierKeyValidationRequest, address::AztecAddress,
+    constants::CANONICAL_KEY_REGISTRY_ADDRESS, grumpkin_point::GrumpkinPoint
+};
 use crate::{
     context::PrivateContext,
     oracle::{
     keys::get_public_keys_and_partial_address,
-    nullifier_keys::{NullifierKeys, get_nullifier_keys as get_nullifier_keys_oracle}
+    nullifier_keys::get_nullifier_keys as get_nullifier_keys_oracle
 },
     keys::public_keys::{PublicKeys, NULLIFIER_INDEX, INCOMING_INDEX},
     state_vars::{
@@ -92,7 +95,7 @@ fn fetch_and_constrain_keys(address: AztecAddress) -> PublicKeys {
 }
 
 // We get the full struct Nullifier Keys here
-pub fn get_nullifier_keys(npk_m_hash: Field) -> NullifierKeys {
+pub fn get_nullifier_keys(npk_m_hash: Field) -> NullifierKeyValidationRequest {
     let nullifier_keys = get_nullifier_keys_oracle(npk_m_hash);
     assert_eq(nullifier_keys.master_nullifier_public_key.hash(), npk_m_hash);
 
diff --git a/noir-projects/aztec-nr/aztec/src/oracle/nullifier_keys.nr b/noir-projects/aztec-nr/aztec/src/oracle/nullifier_keys.nr
index 1d8fd94052f..37ec10e5919 100644
--- a/noir-projects/aztec-nr/aztec/src/oracle/nullifier_keys.nr
+++ b/noir-projects/aztec-nr/aztec/src/oracle/nullifier_keys.nr
@@ -1,35 +1,17 @@
-use dep::protocol_types::{
-    address::AztecAddress, traits::Empty, grumpkin_point::GrumpkinPoint,
-    grumpkin_private_key::GrumpkinPrivateKey
-};
-
-// Nullifier keys pertaining to a specific account
-struct NullifierKeys {
-    master_nullifier_public_key: GrumpkinPoint,
-    app_nullifier_secret_key: Field,
-}
-
-impl Empty for NullifierKeys {
-    fn empty() -> Self {
-        NullifierKeys {
-            master_nullifier_public_key: GrumpkinPoint::zero(),
-            app_nullifier_secret_key: 0
-        }
-    }
-}
+use dep::protocol_types::{grumpkin_point::GrumpkinPoint, abis::nullifier_key_validation_request::NullifierKeyValidationRequest};
 
 #[oracle(getNullifierKeys)]
 fn get_nullifier_keys_oracle(_npk_m_hash: Field) -> [Field; 3] {}
 
-unconstrained fn get_nullifier_keys_internal(npk_m_hash: Field) -> NullifierKeys {
+unconstrained fn get_nullifier_keys_internal(npk_m_hash: Field) -> NullifierKeyValidationRequest {
     let result = get_nullifier_keys_oracle(npk_m_hash);
-    NullifierKeys {
+    NullifierKeyValidationRequest {
         master_nullifier_public_key: GrumpkinPoint { x: result[0], y: result[1] },
         app_nullifier_secret_key: result[2]
     }
 }
 
 // We get the full struct Nullifier Keys here
-pub fn get_nullifier_keys(npk_m_hash: Field) -> NullifierKeys {
+pub fn get_nullifier_keys(npk_m_hash: Field) -> NullifierKeyValidationRequest {
     get_nullifier_keys_internal(npk_m_hash)
 }