diff --git a/integration_tests/src/config.rs b/integration_tests/src/config.rs
index c4718f71..f385682f 100644
--- a/integration_tests/src/config.rs
+++ b/integration_tests/src/config.rs
@@ -60,11 +60,11 @@ impl InitialData {
 
         let mut private_charlie_key_chain = KeyChain::new_os_random();
         let mut private_charlie_account_id =
-            AccountId::from(&private_charlie_key_chain.nullifier_public_key);
+            AccountId::from((&private_charlie_key_chain.nullifier_public_key, 0));
 
         let mut private_david_key_chain = KeyChain::new_os_random();
         let mut private_david_account_id =
-            AccountId::from(&private_david_key_chain.nullifier_public_key);
+            AccountId::from((&private_david_key_chain.nullifier_public_key, 0));
 
         // Ensure consistent ordering
         if private_charlie_account_id > private_david_account_id {
@@ -139,7 +139,7 @@ impl InitialData {
                 })
             })
             .chain(self.private_accounts.iter().map(|(key_chain, account)| {
-                let account_id = AccountId::from(&key_chain.nullifier_public_key);
+                let account_id = AccountId::from((&key_chain.nullifier_public_key, 0));
                 InitialAccountData::Private(Box::new(PrivateAccountPrivateInitialData {
                     account_id,
                     account: account.clone(),
diff --git a/integration_tests/tests/tps.rs b/integration_tests/tests/tps.rs
index bd46849e..d670ba29 100644
--- a/integration_tests/tests/tps.rs
+++ b/integration_tests/tests/tps.rs
@@ -220,14 +220,14 @@ fn build_privacy_transaction() -> PrivacyPreservingTransaction {
             data: Data::default(),
         },
         true,
-        AccountId::from(&sender_npk),
+        AccountId::from((&sender_npk, 0)),
     );
     let recipient_nsk = [2; 32];
     let recipient_vsk = [99; 32];
     let recipient_vpk = ViewingPublicKey::from_scalar(recipient_vsk);
     let recipient_npk = NullifierPublicKey::from(&recipient_nsk);
     let recipient_pre =
-        AccountWithMetadata::new(Account::default(), false, AccountId::from(&recipient_npk));
+        AccountWithMetadata::new(Account::default(), false, AccountId::from((&recipient_npk, 0)));
 
     let eph_holder_from = EphemeralKeyHolder::new(&sender_npk);
     let sender_ss = eph_holder_from.calculate_shared_secret_sender(&sender_vpk);
diff --git a/integration_tests/tests/wallet_ffi.rs b/integration_tests/tests/wallet_ffi.rs
index ac548280..5a7f1787 100644
--- a/integration_tests/tests/wallet_ffi.rs
+++ b/integration_tests/tests/wallet_ffi.rs
@@ -332,7 +332,7 @@ fn wallet_ffi_save_and_load_persistent_storage() -> Result<()> {
     };
 
     assert_eq!(
-        nssa::AccountId::from(&private_account_keys.npk()),
+        nssa::AccountId::from((&private_account_keys.npk(), 0)),
         out_private_account_id.into()
     );
 
diff --git a/key_protocol/src/key_management/key_tree/keys_private.rs b/key_protocol/src/key_management/key_tree/keys_private.rs
index 42130b1f..ffee6687 100644
--- a/key_protocol/src/key_management/key_tree/keys_private.rs
+++ b/key_protocol/src/key_management/key_tree/keys_private.rs
@@ -10,6 +10,7 @@ use crate::key_management::{
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct ChildKeysPrivate {
+    // this should store value: (keychain, vec<identifier, account>) 
     pub value: (KeyChain, nssa::Account),
     pub ccc: [u8; 32],
     /// Can be [`None`] if root.
@@ -111,7 +112,7 @@ impl KeyNode for ChildKeysPrivate {
     }
 
     fn account_id(&self) -> nssa::AccountId {
-        nssa::AccountId::from(&self.value.0.nullifier_public_key)
+        nssa::AccountId::from((&self.value.0.nullifier_public_key, 0))
     }
 }
 
diff --git a/key_protocol/src/key_protocol_core/mod.rs b/key_protocol/src/key_protocol_core/mod.rs
index 8186865f..3d3eb1b5 100644
--- a/key_protocol/src/key_protocol_core/mod.rs
+++ b/key_protocol/src/key_protocol_core/mod.rs
@@ -17,6 +17,7 @@ pub struct NSSAUserData {
     /// Default public accounts.
     pub default_pub_account_signing_keys: BTreeMap<nssa::AccountId, nssa::PrivateKey>,
     /// Default private accounts.
+    // TODO: this should store (keychain, account, identifier) in the values of the map
     pub default_user_private_accounts:
         BTreeMap<nssa::AccountId, (KeyChain, nssa_core::account::Account)>,
     /// Tree of public keys.
@@ -46,7 +47,8 @@ impl NSSAUserData {
     ) -> bool {
         let mut check_res = true;
         for (account_id, (key, _)) in accounts_keys_map {
-            let expected_account_id = nssa::AccountId::from(&key.nullifier_public_key);
+            // TODO: Generalize to other identifiers
+            let expected_account_id = nssa::AccountId::from((&key.nullifier_public_key, 0));
             if expected_account_id != *account_id {
                 println!("{expected_account_id}, {account_id}");
                 check_res = false;
diff --git a/nssa/core/src/nullifier.rs b/nssa/core/src/nullifier.rs
index 0e15ec74..6cff8246 100644
--- a/nssa/core/src/nullifier.rs
+++ b/nssa/core/src/nullifier.rs
@@ -8,14 +8,22 @@ use crate::{Commitment, account::AccountId};
 #[cfg_attr(any(feature = "host", test), derive(Clone, Hash))]
 pub struct NullifierPublicKey(pub [u8; 32]);
 
-impl From<&NullifierPublicKey> for AccountId {
-    fn from(value: &NullifierPublicKey) -> Self {
+pub type Identifier = u128;
+
+impl From<(&NullifierPublicKey, Identifier)> for AccountId {
+    fn from(value: (&NullifierPublicKey, Identifier)) -> Self {
+        let (npk, _identifier) = value;
         const PRIVATE_ACCOUNT_ID_PREFIX: &[u8; 32] =
             b"/LEE/v0.3/AccountId/Private/\x00\x00\x00\x00";
 
+        // 32 bytes prefix || 32 bytes npk || 16 bytes identifier
+        // TODO: change bytes to [0; 80] and include identifier in little endian;
         let mut bytes = [0; 64];
         bytes[0..32].copy_from_slice(PRIVATE_ACCOUNT_ID_PREFIX);
-        bytes[32..].copy_from_slice(&value.0);
+        bytes[32..64].copy_from_slice(&npk.0);
+        // // TODO: uncomment this line
+        // bytes[64..].copy_from_slice(&identifier.to_le_bytes());
+
         Self::new(
             Impl::hash_bytes(&bytes)
                 .as_bytes()
@@ -149,7 +157,7 @@ mod tests {
             81, 186, 14, 167, 234, 28, 236, 32, 213, 125, 251, 193, 233,
         ]);
 
-        let account_id = AccountId::from(&npk);
+        let account_id = AccountId::from((&npk, 0));
 
         assert_eq!(account_id, expected_account_id);
     }
diff --git a/nssa/src/privacy_preserving_transaction/circuit.rs b/nssa/src/privacy_preserving_transaction/circuit.rs
index 6c174450..6506e9fe 100644
--- a/nssa/src/privacy_preserving_transaction/circuit.rs
+++ b/nssa/src/privacy_preserving_transaction/circuit.rs
@@ -214,7 +214,7 @@ mod tests {
         let recipient = AccountWithMetadata::new(
             Account::default(),
             false,
-            AccountId::from(&recipient_keys.npk()),
+            AccountId::from((&recipient_keys.npk(), 0)),
         );
 
         let balance_to_move: u128 = 37;
@@ -284,14 +284,14 @@ mod tests {
                 data: Data::default(),
             },
             true,
-            AccountId::from(&sender_keys.npk()),
+            AccountId::from((&sender_keys.npk(), 0)),
         );
         let commitment_sender = Commitment::new(&sender_keys.npk(), &sender_pre.account);
 
         let recipient = AccountWithMetadata::new(
             Account::default(),
             false,
-            AccountId::from(&recipient_keys.npk()),
+            AccountId::from((&recipient_keys.npk(), 0)),
         );
         let balance_to_move: u128 = 37;
 
@@ -380,7 +380,7 @@ mod tests {
         let pre = AccountWithMetadata::new(
             Account::default(),
             false,
-            AccountId::from(&account_keys.npk()),
+            AccountId::from((&account_keys.npk(), 0)),
         );
 
         let validity_window_chain_caller = Program::validity_window_chain_caller();
diff --git a/nssa/src/state.rs b/nssa/src/state.rs
index 17abc6d1..5c15e192 100644
--- a/nssa/src/state.rs
+++ b/nssa/src/state.rs
@@ -1212,7 +1212,7 @@ pub mod tests {
 
         let sender_nonce = sender.account.nonce;
 
-        let recipient = AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+        let recipient = AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         let esk = [3; 32];
         let shared_secret = SharedSecretKey::new(&esk, &recipient_keys.vpk());
@@ -1251,9 +1251,9 @@ pub mod tests {
         let program = Program::authenticated_transfer_program();
         let sender_commitment = Commitment::new(&sender_keys.npk(), sender_private_account);
         let sender_pre =
-            AccountWithMetadata::new(sender_private_account.clone(), true, &sender_keys.npk());
+            AccountWithMetadata::new(sender_private_account.clone(), true, (&sender_keys.npk(), 0));
         let recipient_pre =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         let esk_1 = [3; 32];
         let shared_secret_1 = SharedSecretKey::new(&esk_1, &sender_keys.vpk());
@@ -1303,7 +1303,7 @@ pub mod tests {
         let program = Program::authenticated_transfer_program();
         let sender_commitment = Commitment::new(&sender_keys.npk(), sender_private_account);
         let sender_pre =
-            AccountWithMetadata::new(sender_private_account.clone(), true, &sender_keys.npk());
+            AccountWithMetadata::new(sender_private_account.clone(), true, (&sender_keys.npk(), 0));
         let recipient_pre = AccountWithMetadata::new(
             state.get_account_by_id(*recipient_account_id),
             false,
@@ -1824,10 +1824,10 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
@@ -1862,7 +1862,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
             AccountWithMetadata::new(Account::default(), false, AccountId::new([1; 32]));
@@ -1897,10 +1897,10 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         // Setting no second commitment proof.
         let private_account_membership_proofs = [Some((0, vec![]))];
@@ -1938,10 +1938,10 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         // Setting no auth key for an execution with one non default private accounts.
         let private_account_nsks = [];
@@ -1979,10 +1979,10 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         let private_account_keys = [
             // First private account is the sender
@@ -2027,7 +2027,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 = AccountWithMetadata::new(
             Account {
@@ -2036,7 +2036,7 @@ pub mod tests {
                 ..Account::default()
             },
             false,
-            &recipient_keys.npk(),
+            (&recipient_keys.npk(), 0),
         );
 
         let result = execute_and_prove(
@@ -2073,7 +2073,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 = AccountWithMetadata::new(
             Account {
@@ -2082,7 +2082,7 @@ pub mod tests {
                 ..Account::default()
             },
             false,
-            &recipient_keys.npk(),
+            (&recipient_keys.npk(), 0),
         );
 
         let result = execute_and_prove(
@@ -2119,7 +2119,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 = AccountWithMetadata::new(
             Account {
@@ -2128,7 +2128,7 @@ pub mod tests {
                 ..Account::default()
             },
             false,
-            &recipient_keys.npk(),
+            (&recipient_keys.npk(), 0),
         );
 
         let result = execute_and_prove(
@@ -2165,7 +2165,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 = AccountWithMetadata::new(
             Account {
@@ -2174,7 +2174,7 @@ pub mod tests {
                 ..Account::default()
             },
             false,
-            &recipient_keys.npk(),
+            (&recipient_keys.npk(), 0),
         );
 
         let result = execute_and_prove(
@@ -2212,13 +2212,13 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 = AccountWithMetadata::new(
             Account::default(),
             // This should be set to false in normal circumstances
             true,
-            &recipient_keys.npk(),
+            (&recipient_keys.npk(), 0),
         );
 
         let result = execute_and_prove(
@@ -2284,10 +2284,10 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
@@ -2323,10 +2323,10 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         // Setting three private account keys for a circuit execution with only two private
         // accounts.
@@ -2369,10 +2369,10 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
         let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
         // Setting two private account keys for a circuit execution with only one non default
         // private account (visibility mask equal to 1 means that auth keys are expected).
@@ -2468,7 +2468,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &sender_keys.npk(),
+            (&sender_keys.npk(), 0),
         );
 
         let visibility_mask = [1, 1];
@@ -2802,7 +2802,7 @@ pub mod tests {
             vec![(sender_commitment.clone(), sender_init_nullifier)],
             0,
         );
-        let sender_pre = AccountWithMetadata::new(sender_private_account, true, &sender_keys.npk());
+        let sender_pre = AccountWithMetadata::new(sender_private_account, true, (&sender_keys.npk(), 0));
         let recipient_private_key = PrivateKey::try_new([2; 32]).unwrap();
         let recipient_account_id =
             AccountId::from(&PublicKey::new_from_private_key(&recipient_private_key));
@@ -2868,7 +2868,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &from_keys.npk(),
+            (&from_keys.npk(), 0),
         );
         let to_account = AccountWithMetadata::new(
             Account {
@@ -2876,7 +2876,7 @@ pub mod tests {
                 ..Account::default()
             },
             true,
-            &to_keys.npk(),
+            (&to_keys.npk(), 0),
         );
 
         let from_commitment = Commitment::new(&from_keys.npk(), &from_account.account);
@@ -3166,7 +3166,7 @@ pub mod tests {
 
         // Create an authorized private account with default values (new account being initialized)
         let authorized_account =
-            AccountWithMetadata::new(Account::default(), true, &private_keys.npk());
+            AccountWithMetadata::new(Account::default(), true, (&private_keys.npk(), 0));
 
         let program = Program::authenticated_transfer_program();
 
@@ -3219,7 +3219,7 @@ pub mod tests {
         // operate them without the corresponding private keys, so unauthorized private claiming
         // remains allowed.
         let unauthorized_account =
-            AccountWithMetadata::new(Account::default(), false, &private_keys.npk());
+            AccountWithMetadata::new(Account::default(), false, (&private_keys.npk(), 0));
 
         let program = Program::claimer();
         let esk = [5; 32];
@@ -3265,7 +3265,7 @@ pub mod tests {
 
         // Step 1: Create a new private account with authorization
         let authorized_account =
-            AccountWithMetadata::new(Account::default(), true, &private_keys.npk());
+            AccountWithMetadata::new(Account::default(), true, (&private_keys.npk(), 0));
 
         let claimer_program = Program::claimer();
 
@@ -3387,7 +3387,7 @@ pub mod tests {
         let program = Program::changer_claimer();
         let sender_keys = test_private_account_keys_1();
         let private_account =
-            AccountWithMetadata::new(Account::default(), true, &sender_keys.npk());
+            AccountWithMetadata::new(Account::default(), true, (&sender_keys.npk(), 0));
         // Don't change data (None) and don't claim (false)
         let instruction: (Option<Vec<u8>>, bool) = (None, false);
 
@@ -3413,7 +3413,7 @@ pub mod tests {
         let program = Program::changer_claimer();
         let sender_keys = test_private_account_keys_1();
         let private_account =
-            AccountWithMetadata::new(Account::default(), true, &sender_keys.npk());
+            AccountWithMetadata::new(Account::default(), true, (&sender_keys.npk(), 0));
         // Change data but don't claim (false) - should fail
         let new_data = vec![1, 2, 3, 4, 5];
         let instruction: (Option<Vec<u8>>, bool) = (Some(new_data), false);
@@ -3453,7 +3453,7 @@ pub mod tests {
             sender_keys.account_id(),
         );
         let recipient_account =
-            AccountWithMetadata::new(Account::default(), true, &recipient_keys.npk());
+            AccountWithMetadata::new(Account::default(), true, (&recipient_keys.npk(), 0));
 
         let recipient_commitment =
             Commitment::new(&recipient_keys.npk(), &recipient_account.account);
@@ -3615,7 +3615,7 @@ pub mod tests {
         let block_validity_window: BlockValidityWindow = validity_window.try_into().unwrap();
         let validity_window_program = Program::validity_window();
         let account_keys = test_private_account_keys_1();
-        let pre = AccountWithMetadata::new(Account::default(), false, &account_keys.npk());
+        let pre = AccountWithMetadata::new(Account::default(), false, (&account_keys.npk(), 0));
         let mut state = V03State::new_with_genesis_accounts(&[], vec![], 0).with_test_programs();
         let tx = {
             let esk = [3; 32];
@@ -3684,7 +3684,7 @@ pub mod tests {
             validity_window.try_into().unwrap();
         let validity_window_program = Program::validity_window();
         let account_keys = test_private_account_keys_1();
-        let pre = AccountWithMetadata::new(Account::default(), false, &account_keys.npk());
+        let pre = AccountWithMetadata::new(Account::default(), false, (&account_keys.npk(), 0));
         let mut state = V03State::new_with_genesis_accounts(&[], vec![], 0).with_test_programs();
         let tx = {
             let esk = [3; 32];
diff --git a/program_methods/guest/src/bin/privacy_preserving_circuit.rs b/program_methods/guest/src/bin/privacy_preserving_circuit.rs
index 1d091e1c..b9287558 100644
--- a/program_methods/guest/src/bin/privacy_preserving_circuit.rs
+++ b/program_methods/guest/src/bin/privacy_preserving_circuit.rs
@@ -343,7 +343,7 @@ fn compute_circuit_output(
                 };
 
                 assert_eq!(
-                    AccountId::from(npk),
+                    AccountId::from((npk, 0)),
                     pre_state.account_id,
                     "AccountId mismatch"
                 );
diff --git a/sequencer/core/src/lib.rs b/sequencer/core/src/lib.rs
index cbf8e910..16f5b4d5 100644
--- a/sequencer/core/src/lib.rs
+++ b/sequencer/core/src/lib.rs
@@ -1107,7 +1107,7 @@ mod tests {
         let epk = EphemeralPublicKey::from_scalar(esk);
 
         let (output, proof) = execute_and_prove(
-            vec![AccountWithMetadata::new(Account::default(), true, &npk)],
+            vec![AccountWithMetadata::new(Account::default(), true, (&npk, 0))],
             Program::serialize_instruction(0_u128).unwrap(),
             vec![1],
             vec![(npk.clone(), shared_secret)],
diff --git a/testnet_initial_state/src/lib.rs b/testnet_initial_state/src/lib.rs
index 91315eec..8532968e 100644
--- a/testnet_initial_state/src/lib.rs
+++ b/testnet_initial_state/src/lib.rs
@@ -142,7 +142,7 @@ pub fn initial_priv_accounts_private_keys() -> Vec<PrivateAccountPrivateInitialD
 
     vec![
         PrivateAccountPrivateInitialData {
-            account_id: AccountId::from(&key_chain_1.nullifier_public_key),
+            account_id: AccountId::from((&key_chain_1.nullifier_public_key, 0)),
             account: Account {
                 program_owner: DEFAULT_PROGRAM_OWNER,
                 balance: PRIV_ACC_A_INITIAL_BALANCE,
@@ -152,7 +152,7 @@ pub fn initial_priv_accounts_private_keys() -> Vec<PrivateAccountPrivateInitialD
             key_chain: key_chain_1,
         },
         PrivateAccountPrivateInitialData {
-            account_id: AccountId::from(&key_chain_2.nullifier_public_key),
+            account_id: AccountId::from((&key_chain_2.nullifier_public_key, 0)),
             account: Account {
                 program_owner: DEFAULT_PROGRAM_OWNER,
                 balance: PRIV_ACC_B_INITIAL_BALANCE,
diff --git a/wallet/src/privacy_preserving_tx.rs b/wallet/src/privacy_preserving_tx.rs
index 04056111..3a81e22a 100644
--- a/wallet/src/privacy_preserving_tx.rs
+++ b/wallet/src/privacy_preserving_tx.rs
@@ -83,7 +83,7 @@ impl AccountManager {
                 }
                 PrivacyPreservingAccount::PrivateForeign { npk, vpk } => {
                     let acc = nssa_core::account::Account::default();
-                    let auth_acc = AccountWithMetadata::new(acc, false, &npk);
+                    let auth_acc = AccountWithMetadata::new(acc, false, (&npk, 0));
                     let pre = AccountPreparedData {
                         nsk: None,
                         npk,
@@ -224,7 +224,7 @@ async fn private_acc_preparation(
 
     // TODO: Technically we could allow unauthorized owned accounts, but currently we don't have
     // support from that in the wallet.
-    let sender_pre = AccountWithMetadata::new(from_acc.clone(), true, &from_npk);
+    let sender_pre = AccountWithMetadata::new(from_acc.clone(), true, (&from_npk, 0));
 
     Ok(AccountPreparedData {
         nsk: Some(nsk),